diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 3876 |
1 files changed, 0 insertions, 3876 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc deleted file mode 100644 index 7801ea2b3..000000000 --- a/winsup/cygwin/syscalls.cc +++ /dev/null @@ -1,3876 +0,0 @@ -/* syscalls.cc: syscalls - - Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, - 2005, 2006, 2007, 2008 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#define fstat __FOOfstat__ -#define lstat __FOOlstat__ -#define stat __FOOstat__ -#define _close __FOO_close__ -#define _lseek __FOO_lseek__ -#define _open __FOO_open__ -#define _read __FOO_read__ -#define _write __FOO_write__ -#define _open64 __FOO_open64__ -#define _lseek64 __FOO_lseek64__ -#define _fstat64 __FOO_fstat64__ -#define pread __FOO_pread -#define pwrite __FOO_pwrite - -#include "winsup.h" -#include "miscfuncs.h" -#include <sys/stat.h> -#include <sys/vfs.h> /* needed for statfs */ -#include <sys/statvfs.h> /* needed for statvfs */ -#include <stdlib.h> -#include <stdio.h> -#include <process.h> -#include <utmp.h> -#include <utmpx.h> -#include <sys/uio.h> -#include <ctype.h> -#include <unistd.h> -#include <sys/wait.h> -#include <rpc.h> -#include "ntdll.h" - -#undef fstat -#undef lstat -#undef stat -#undef pread -#undef pwrite - -#include <cygwin/version.h> -#include "cygerrno.h" -#include "perprocess.h" -#include "security.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "sigproc.h" -#include "pinfo.h" -#include "shared_info.h" -#include "cygheap.h" -#include "pwdgrp.h" -#include "cpuid.h" -#include "registry.h" -#include "environ.h" -#include "tls_pbuf.h" - -#undef _close -#undef _lseek -#undef _open -#undef _read -#undef _write -#undef _open64 -#undef _lseek64 -#undef _fstat64 - -suffix_info stat_suffixes[] = -{ - suffix_info ("", 1), - suffix_info (".exe", 1), - suffix_info (NULL) -}; - -SYSTEM_INFO system_info; - -static int __stdcall mknod_worker (const char *, mode_t, mode_t, _major_t, - _minor_t); - -/* Close all files and process any queued deletions. - Lots of unix style applications will open a tmp file, unlink it, - but never call close. This function is called by _exit to - ensure we don't leave any such files lying around. */ - -void __stdcall -close_all_files (bool norelease) -{ - cygheap->fdtab.lock (); - - semaphore::terminate (); - - fhandler_base *fh; - HANDLE h = NULL; - - for (int i = 0; i < (int) cygheap->fdtab.size; i++) - if ((fh = cygheap->fdtab[i]) != NULL) - { -#ifdef DEBUGGING - debug_printf ("closing fd %d", i); -#endif - if (i == 2) - DuplicateHandle (GetCurrentProcess (), fh->get_output_handle (), GetCurrentProcess (), &h, 0, false, - DUPLICATE_SAME_ACCESS); - fh->close (); - if (!norelease) - cygheap->fdtab.release (i); - } - - if (!hExeced && cygheap->ctty) - cygheap->close_ctty (); - - if (h) - SetStdHandle (STD_ERROR_HANDLE, h); - cygheap->fdtab.unlock (); -} - -int -dup (int fd) -{ - return cygheap->fdtab.dup2 (fd, cygheap_fdnew ()); -} - -int -dup2 (int oldfd, int newfd) -{ - return cygheap->fdtab.dup2 (oldfd, newfd); -} - -static char desktop_ini[] = - "[.ShellClassInfo]\r\nCLSID={645FF040-5081-101B-9F08-00AA002F954E}\r\n"; -static BYTE info2[] = -{ - 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x20, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 -}; - -static void -try_to_bin (path_conv &win32_path, HANDLE h) -{ - NTSTATUS status; - OBJECT_ATTRIBUTES attr; - IO_STATUS_BLOCK io; - HANDLE rootdir = NULL, recyclerdir = NULL; - USHORT recycler_base_len = 0, recycler_user_len = 0; - UNICODE_STRING root, recycler, fname; - WCHAR recyclerbuf[NAME_MAX + 1]; /* Enough for recycler + SID + filename */ - PFILE_NAME_INFORMATION pfni; - PFILE_INTERNAL_INFORMATION pfii; - PFILE_RENAME_INFORMATION pfri; - BYTE infobuf[sizeof (FILE_NAME_INFORMATION ) + 32767 * sizeof (WCHAR)]; - - pfni = (PFILE_NAME_INFORMATION) infobuf; - status = NtQueryInformationFile (h, &io, pfni, sizeof infobuf, - FileNameInformation); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtQueryInformationFile (FileNameInformation) failed, %08x", - status); - goto out; - } - /* The filename could change, the parent dir not. So we split both paths - and take the prefix. However, there are two special cases: - - The handle refers to the root dir of the volume. - - The handle refers to the recycler or a subdir. - Both cases are handled by just returning and not even trying to move - them into the recycler. */ - if (pfni->FileNameLength == 2) /* root dir. */ - goto out; - /* Initialize recycler path. */ - RtlInitEmptyUnicodeString (&recycler, recyclerbuf, sizeof recyclerbuf); - if (wincap.has_recycle_dot_bin ()) /* NTFS and FAT since Vista */ - RtlAppendUnicodeToString (&recycler, L"\\$Recycle.Bin\\"); - else if (win32_path.fs_is_ntfs ()) /* NTFS up to 2K3 */ - RtlAppendUnicodeToString (&recycler, L"\\RECYCLER\\"); - else if (win32_path.fs_is_fat ()) /* FAT up to 2K3 */ - RtlAppendUnicodeToString (&recycler, L"\\Recycled\\"); - else - goto out; - /* Is the file a subdir of the recycler? */ - RtlInitCountedUnicodeString(&fname, pfni->FileName, pfni->FileNameLength); - if (RtlEqualUnicodePathPrefix (&fname, recycler.Buffer, TRUE)) - goto out; - /* Is fname the recycler? Temporarily hide trailing backslash. */ - recycler.Length -= sizeof (WCHAR); - if (RtlEqualUnicodeString (&fname, &recycler, TRUE)) - goto out; - - /* Create root dir path from file name information. */ - RtlSplitUnicodePath (&fname, &fname, NULL); - RtlSplitUnicodePath (win32_path.get_nt_native_path (), &root, NULL); - root.Length -= fname.Length - sizeof (WCHAR); - - /* Open root directory. All recycler bin ops are caseinsensitive. */ - InitializeObjectAttributes (&attr, &root, OBJ_CASE_INSENSITIVE, NULL, NULL); - status = NtOpenFile (&rootdir, FILE_TRAVERSE, &attr, &io, - FILE_SHARE_VALID_FLAGS, FILE_OPEN_FOR_BACKUP_INTENT); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtOpenFile (%S) failed, %08x", &root, status); - goto out; - } - - /* Strip leading backslash */ - ++recycler.Buffer; - recycler.Length -= sizeof (WCHAR); - /* Store length of recycler base dir, should it be necessary to create it. */ - recycler_base_len = recycler.Length; - /* On NTFS the recycler dir contains user specific subdirs, which are the - actual recycle bins per user. The name if this dir is the string - representation of the user SID. */ - if (win32_path.fs_is_ntfs ()) - { - UNICODE_STRING sid; - WCHAR sidbuf[128]; - /* Unhide trailing backslash. */ - recycler.Length += sizeof (WCHAR); - RtlInitEmptyUnicodeString (&sid, sidbuf, sizeof sidbuf); - /* In contrast to what MSDN claims, this function is already available - since NT4. */ - RtlConvertSidToUnicodeString (&sid, cygheap->user.sid (), FALSE); - RtlAppendUnicodeStringToString (&recycler, &sid); - recycler_user_len = recycler.Length; - } - /* Create hopefully unique filename. */ - RtlAppendUnicodeToString (&recycler, L"\\cyg"); - pfii = (PFILE_INTERNAL_INFORMATION) infobuf; - status = NtQueryInformationFile (h, &io, pfii, sizeof infobuf, - FileInternalInformation); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtQueryInformationFile (FileInternalInformation) failed, " - "%08x", status); - goto out; - } - RtlInt64ToHexUnicodeString (pfii->FileId.QuadPart, &recycler, TRUE); - /* Shoot. */ - pfri = (PFILE_RENAME_INFORMATION) infobuf; - pfri->ReplaceIfExists = TRUE; - pfri->RootDirectory = rootdir; - pfri->FileNameLength = recycler.Length; - memcpy (pfri->FileName, recycler.Buffer, recycler.Length); - status = NtSetInformationFile (h, &io, pfri, sizeof infobuf, - FileRenameInformation); - if (status == STATUS_OBJECT_PATH_NOT_FOUND) - { - /* Ok, so the recycler and/or the recycler/SID directory don't exist. - First reopen root dir with permission to create subdirs. */ - NtClose (rootdir); - status = NtOpenFile (&rootdir, FILE_ADD_SUBDIRECTORY, &attr, &io, - FILE_SHARE_VALID_FLAGS, FILE_OPEN_FOR_BACKUP_INTENT); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtOpenFile (%S) failed, %08x", &recycler, status); - goto out; - } - /* Then check if recycler exists by opening and potentially creating it. - Yes, we can really do that. Typically the recycle bin is created - by the first user actually using the bin. The permissions are the - default permissions propagated from the root directory. */ - InitializeObjectAttributes (&attr, &recycler, OBJ_CASE_INSENSITIVE, - rootdir, NULL); - recycler.Length = recycler_base_len; - status = NtCreateFile (&recyclerdir, - READ_CONTROL - | (win32_path.fs_is_ntfs () ? 0 : FILE_ADD_FILE), - &attr, &io, NULL, - FILE_ATTRIBUTE_DIRECTORY - | FILE_ATTRIBUTE_SYSTEM - | FILE_ATTRIBUTE_HIDDEN, - FILE_SHARE_VALID_FLAGS, FILE_OPEN_IF, - FILE_DIRECTORY_FILE, NULL, 0); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtCreateFile (%S) failed, %08x", &recycler, status); - goto out; - } - /* Next, if necessary, check if the recycler/SID dir exists and - create it if not. */ - if (win32_path.fs_is_ntfs ()) - { - NtClose (recyclerdir); - recycler.Length = recycler_user_len; - status = NtCreateFile (&recyclerdir, READ_CONTROL | FILE_ADD_FILE, - &attr, &io, NULL, FILE_ATTRIBUTE_DIRECTORY - | FILE_ATTRIBUTE_SYSTEM - | FILE_ATTRIBUTE_HIDDEN, - FILE_SHARE_VALID_FLAGS, FILE_OPEN_IF, - FILE_DIRECTORY_FILE, NULL, 0); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtCreateFile (%S) failed, %08x", - &recycler, status); - goto out; - } - } - /* The desktop.ini and INFO2 (pre-Vista) files are expected by - Windows Explorer. Otherwise, the created bin is treated as - corrupted */ - if (io.Information == FILE_CREATED) - { - HANDLE fh; - RtlInitUnicodeString (&fname, L"desktop.ini"); - InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE, - recyclerdir, NULL); - status = NtCreateFile (&fh, FILE_GENERIC_WRITE, &attr, &io, NULL, - FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN, - FILE_SHARE_VALID_FLAGS, FILE_CREATE, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_NON_DIRECTORY_FILE, NULL, 0); - if (!NT_SUCCESS (status)) - debug_printf ("NtCreateFile (%S) failed, %08x", &recycler, status); - else - { - status = NtWriteFile (fh, NULL, NULL, NULL, &io, desktop_ini, - sizeof desktop_ini - 1, NULL, NULL); - if (!NT_SUCCESS (status)) - debug_printf ("NtWriteFile (%S) failed, %08x", &fname, status); - NtClose (fh); - } - if (!wincap.has_recycle_dot_bin ()) /* No INFO2 file since Vista */ - { - RtlInitUnicodeString (&fname, L"INFO2"); - status = NtCreateFile (&fh, FILE_GENERIC_WRITE, &attr, &io, NULL, - FILE_ATTRIBUTE_ARCHIVE - | FILE_ATTRIBUTE_HIDDEN, - FILE_SHARE_VALID_FLAGS, FILE_CREATE, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_NON_DIRECTORY_FILE, NULL, 0); - if (!NT_SUCCESS (status)) - debug_printf ("NtCreateFile (%S) failed, %08x", - &recycler, status); - else - { - status = NtWriteFile (fh, NULL, NULL, NULL, &io, info2, - sizeof info2, NULL, NULL); - if (!NT_SUCCESS (status)) - debug_printf ("NtWriteFile (%S) failed, %08x", - &fname, status); - NtClose (fh); - } - } - } - NtClose (recyclerdir); - /* Shoot again. */ - status = NtSetInformationFile (h, &io, pfri, sizeof infobuf, - FileRenameInformation); - } - if (!NT_SUCCESS (status)) - debug_printf ("Move %S to %S failed, status = %p", - win32_path.get_nt_native_path (), &recycler, status); -out: - if (rootdir) - NtClose (rootdir); -} - -static NTSTATUS -check_dir_not_empty (HANDLE dir) -{ - IO_STATUS_BLOCK io; - const ULONG bufsiz = 3 * sizeof (FILE_NAMES_INFORMATION) - + 3 * NAME_MAX * sizeof (WCHAR); - PFILE_NAMES_INFORMATION pfni = (PFILE_NAMES_INFORMATION) - alloca (bufsiz); - NTSTATUS status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, pfni, - bufsiz, FileNamesInformation, - FALSE, NULL, TRUE); - if (!NT_SUCCESS (status)) - { - syscall_printf ("Checking if directory is empty failed, " - "status = %p", status); - return status; - } - int cnt = 1; - while (pfni->NextEntryOffset) - { - pfni = (PFILE_NAMES_INFORMATION) - ((caddr_t) pfni + pfni->NextEntryOffset); - ++cnt; - } - if (cnt > 2) - { - syscall_printf ("Directory not empty"); - return STATUS_DIRECTORY_NOT_EMPTY; - } - return STATUS_SUCCESS; -} - -NTSTATUS -unlink_nt (path_conv &pc) -{ - NTSTATUS status; - HANDLE fh; - OBJECT_ATTRIBUTES attr; - IO_STATUS_BLOCK io; - FILE_BASIC_INFORMATION fbi; - - ACCESS_MASK access = DELETE; - /* If the R/O attribute is set, we have to open the file with - FILE_WRITE_ATTRIBUTES to be able to remove this flags before trying - to delete it. */ - if (pc.file_attributes () & FILE_ATTRIBUTE_READONLY) - access |= FILE_WRITE_ATTRIBUTES; - - ULONG flags = FILE_OPEN_FOR_BACKUP_INTENT; - /* Add the reparse point flag to native symlinks, otherwise we remove the - target, not the symlink. */ - if (pc.is_rep_symlink ()) - flags |= FILE_OPEN_REPARSE_POINT; - - pc.get_object_attr (attr, sec_none_nih); - /* First try to open the file with sharing not allowed. If the file - has an open handle on it, this will fail. That indicates that the - file has to be moved to the recycle bin so that it actually disappears - from its directory even though its in use. Otherwise, if opening - doesn't fail, the file is not in use and by simply closing the handle - the file will disappear. */ - bool move_to_bin = false; - status = NtOpenFile (&fh, access, &attr, &io, 0, flags); - if (status == STATUS_SHARING_VIOLATION) - { - move_to_bin = true; - if (!pc.isdir () || pc.isremote ()) - status = NtOpenFile (&fh, access, &attr, &io, - FILE_SHARE_VALID_FLAGS, flags); - else - { - /* It's getting tricky. The directory is opened in some process, - so we're supposed to move it to the recycler and mark it for - deletion. But what if the directory is not empty? The move - will work, but the subsequent delete will fail. So we would - have to move it back. That's bad, because the directory would - be moved around which results in a temporary inconsistent state. - So, what we do here is to test if the directory is empty. If - not, we bail out with ERROR_DIR_NOT_EMTPY. The below code - tests for at least three entries in the directory, ".", "..", - and another one. Three entries means, not empty. This doesn't - work for the root directory of a drive, but the root dir can - neither be deleted, nor moved anyway. */ - status = NtOpenFile (&fh, access | FILE_LIST_DIRECTORY | SYNCHRONIZE, - &attr, &io, FILE_SHARE_VALID_FLAGS, - flags | FILE_SYNCHRONOUS_IO_NONALERT); - if (NT_SUCCESS (status)) - { - status = check_dir_not_empty (fh); - if (!NT_SUCCESS (status)) - { - NtClose (fh); - return status; - } - } - } - } - if (!NT_SUCCESS (status)) - { - if (status == STATUS_DELETE_PENDING) - { - syscall_printf ("Delete already pending"); - return 0; - } - syscall_printf ("Opening file for delete failed, status = %p", status); - return status; - } - - if (move_to_bin && !pc.isremote ()) - try_to_bin (pc, fh); - - /* Get rid of read-only attribute. */ - if (access & FILE_WRITE_ATTRIBUTES) - { - fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart = - fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; - fbi.FileAttributes = (pc.file_attributes () & ~FILE_ATTRIBUTE_READONLY) - ?: FILE_ATTRIBUTE_NORMAL; - NtSetInformationFile (fh, &io, &fbi, sizeof fbi, FileBasicInformation); - } - - FILE_DISPOSITION_INFORMATION disp = { TRUE }; - status = NtSetInformationFile (fh, &io, &disp, sizeof disp, - FileDispositionInformation); - if (!NT_SUCCESS (status)) - { - syscall_printf ("Setting delete disposition failed, status = %p", status); - if (access & FILE_WRITE_ATTRIBUTES) - { - /* Restore R/O attributes. */ - fbi.FileAttributes = pc.file_attributes (); - NtSetInformationFile (fh, &io, &fbi, sizeof fbi, - FileBasicInformation); - } - } - else if ((access & FILE_WRITE_ATTRIBUTES) && !pc.isdir ()) - { - /* Restore R/O attribute to accommodate hardlinks. Don't try this - with directories! For some reason the below NtSetInformationFile - changes the disposition for delete back to FALSE, at least on XP. */ - fbi.FileAttributes = pc.file_attributes (); - NtSetInformationFile (fh, &io, &fbi, sizeof fbi, - FileBasicInformation); - } - - NtClose (fh); - return status; -} - -extern "C" int -unlink (const char *ourname) -{ - int res = -1; - DWORD devn; - NTSTATUS status; - - path_conv win32_name (ourname, PC_SYM_NOFOLLOW, stat_suffixes); - - if (win32_name.error) - { - set_errno (win32_name.error); - goto done; - } - - devn = win32_name.get_devn (); - if (isproc_dev (devn)) - { - set_errno (EROFS); - goto done; - } - - if (!win32_name.exists ()) - { - syscall_printf ("unlinking a nonexistent file"); - set_errno (ENOENT); - goto done; - } - else if (win32_name.isdir ()) - { - syscall_printf ("unlinking a directory"); - set_errno (EPERM); - goto done; - } - - status = unlink_nt (win32_name); - if (NT_SUCCESS (status)) - res = 0; - else - __seterrno_from_nt_status (status); - - done: - syscall_printf ("%d = unlink (%s)", res, ourname); - return res; -} - -extern "C" int -_remove_r (struct _reent *, const char *ourname) -{ - path_conv win32_name (ourname, PC_SYM_NOFOLLOW); - - if (win32_name.error) - { - set_errno (win32_name.error); - syscall_printf ("-1 = remove (%s)", ourname); - return -1; - } - - return win32_name.isdir () ? rmdir (ourname) : unlink (ourname); -} - -extern "C" int -remove (const char *ourname) -{ - path_conv win32_name (ourname, PC_SYM_NOFOLLOW); - - if (win32_name.error) - { - set_errno (win32_name.error); - syscall_printf ("-1 = remove (%s)", ourname); - return -1; - } - - return win32_name.isdir () ? rmdir (ourname) : unlink (ourname); -} - -extern "C" pid_t -getpid () -{ - return myself->pid; -} - -extern "C" pid_t -_getpid_r (struct _reent *) -{ - return getpid (); -} - -/* getppid: POSIX 4.1.1.1 */ -extern "C" pid_t -getppid () -{ - return myself->ppid; -} - -/* setsid: POSIX 4.3.2.1 */ -extern "C" pid_t -setsid (void) -{ -#ifdef NEWVFORK - vfork_save *vf = vfork_storage.val (); - /* This is a horrible, horrible kludge */ - if (vf && vf->pid < 0) - { - pid_t pid = fork (); - if (pid > 0) - { - syscall_printf ("longjmping due to vfork"); - vf->restore_pid (pid); - } - /* assuming that fork was successful */ - } -#endif - - if (myself->pgid == myself->pid) - syscall_printf ("hmm. pgid %d pid %d", myself->pgid, myself->pid); - else - { - myself->ctty = -1; - cygheap->manage_console_count ("setsid", 0); - myself->sid = getpid (); - myself->pgid = getpid (); - if (cygheap->ctty) - cygheap->close_ctty (); - syscall_printf ("sid %d, pgid %d, %s", myself->sid, myself->pgid, myctty ()); - return myself->sid; - } - - set_errno (EPERM); - return -1; -} - -extern "C" pid_t -getsid (pid_t pid) -{ - pid_t res; - if (!pid) - res = myself->sid; - else - { - pinfo p (pid); - if (p) - res = p->sid; - else - { - set_errno (ESRCH); - res = -1; - } - } - return res; -} - -extern "C" ssize_t -read (int fd, void *ptr, size_t len) -{ - const iovec iov = - { - iov_base: ptr, - iov_len: len - }; - - return readv (fd, &iov, 1); -} - -extern "C" ssize_t -pread (int fd, void *ptr, size_t len, _off64_t off) -{ - ssize_t res; - cygheap_fdget cfd (fd); - if (cfd < 0) - res = -1; - else - res = cfd->pread (ptr, len, off); - - syscall_printf ("%d = pread (%d, %p, %d, %d), errno %d", - res, fd, ptr, len, off, get_errno ()); - return res; -} - -extern "C" ssize_t -pwrite (int fd, void *ptr, size_t len, _off64_t off) -{ - ssize_t res; - cygheap_fdget cfd (fd); - if (cfd < 0) - res = -1; - else - res = cfd->pwrite (ptr, len, off); - - syscall_printf ("%d = pwrite (%d, %p, %d, %d), errno %d", - res, fd, ptr, len, off, get_errno ()); - return res; -} - -EXPORT_ALIAS (read, _read) - -extern "C" ssize_t -write (int fd, const void *ptr, size_t len) -{ - const struct iovec iov = - { - iov_base: (void *) ptr, // const_cast - iov_len: len - }; - - return writev (fd, &iov, 1); -} - -EXPORT_ALIAS (write, _write) - -extern "C" ssize_t -readv (int fd, const struct iovec *const iov, const int iovcnt) -{ - extern int sigcatchers; - const int e = get_errno (); - - int res = -1; - - const ssize_t tot = check_iovec_for_read (iov, iovcnt); - - if (tot <= 0) - { - res = tot; - goto done; - } - - while (1) - { - cygheap_fdget cfd (fd); - if (cfd < 0) - break; - - if ((cfd->get_flags () & O_ACCMODE) == O_WRONLY) - { - set_errno (EBADF); - break; - } - - DWORD wait = cfd->is_nonblocking () ? 0 : INFINITE; - - /* Could block, so let user know we at least got here. */ - syscall_printf ("readv (%d, %p, %d) %sblocking, sigcatchers %d", - fd, iov, iovcnt, wait ? "" : "non", sigcatchers); - - if (wait && (!cfd->is_slow () || cfd->uninterruptible_io ())) - debug_printf ("no need to call ready_for_read"); - else if (!cfd->ready_for_read (fd, wait)) - { - res = -1; - goto out; - } - - /* FIXME: This is not thread safe. We need some method to - ensure that an fd, closed in another thread, aborts I/O - operations. */ - if (!cfd.isopen ()) - break; - - /* Check to see if this is a background read from a "tty", - sending a SIGTTIN, if appropriate */ - res = cfd->bg_check (SIGTTIN); - - if (!cfd.isopen ()) - { - res = -1; - break; - } - - if (res > bg_eof) - { - myself->process_state |= PID_TTYIN; - if (!cfd.isopen ()) - { - res = -1; - break; - } - res = cfd->readv (iov, iovcnt, tot); - myself->process_state &= ~PID_TTYIN; - } - - out: - if (res >= 0 || get_errno () != EINTR || !_my_tls.call_signal_handler ()) - break; - set_errno (e); - } - -done: - syscall_printf ("%d = readv (%d, %p, %d), errno %d", res, fd, iov, iovcnt, - get_errno ()); - MALLOC_CHECK; - return res; -} - -extern "C" ssize_t -writev (const int fd, const struct iovec *const iov, const int iovcnt) -{ - int res = -1; - const ssize_t tot = check_iovec_for_write (iov, iovcnt); - - cygheap_fdget cfd (fd); - if (cfd < 0) - goto done; - - if (tot <= 0) - { - res = tot; - goto done; - } - - if ((cfd->get_flags () & O_ACCMODE) == O_RDONLY) - { - set_errno (EBADF); - goto done; - } - - /* Could block, so let user know we at least got here. */ - if (fd == 1 || fd == 2) - paranoid_printf ("writev (%d, %p, %d)", fd, iov, iovcnt); - else - syscall_printf ("writev (%d, %p, %d)", fd, iov, iovcnt); - - res = cfd->bg_check (SIGTTOU); - - if (res > (int) bg_eof) - { - myself->process_state |= PID_TTYOU; - res = cfd->writev (iov, iovcnt, tot); - myself->process_state &= ~PID_TTYOU; - } - -done: - if (fd == 1 || fd == 2) - paranoid_printf ("%d = write (%d, %p, %d), errno %d", - res, fd, iov, iovcnt, get_errno ()); - else - syscall_printf ("%d = write (%d, %p, %d), errno %d", - res, fd, iov, iovcnt, get_errno ()); - - MALLOC_CHECK; - return res; -} - -/* _open */ -/* newlib's fcntl.h defines _open as taking variable args so we must - correspond. The third arg if it exists is: mode_t mode. */ -extern "C" int -open (const char *unix_path, int flags, ...) -{ - int res = -1; - va_list ap; - mode_t mode = 0; - sig_dispatch_pending (); - - syscall_printf ("open (%s, %p)", unix_path, flags); - myfault efault; - if (efault.faulted (EFAULT)) - /* errno already set */; - else if (!*unix_path) - set_errno (ENOENT); - else - { - /* check for optional mode argument */ - va_start (ap, flags); - mode = va_arg (ap, mode_t); - va_end (ap); - - fhandler_base *fh; - cygheap_fdnew fd; - - if (fd >= 0) - { - if (!(fh = build_fh_name (unix_path, NULL, - (flags & (O_NOFOLLOW | O_EXCL)) - ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW, - stat_suffixes))) - res = -1; // errno already set - else if ((flags & O_NOFOLLOW) && fh->issymlink ()) - { - delete fh; - res = -1; - set_errno (ELOOP); - } - else if (((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) && fh->exists ()) - { - delete fh; - res = -1; - set_errno (EEXIST); - } - else if (fh->is_fs_special () && fh->device_access_denied (flags)) - { - delete fh; - res = -1; - } - else if (!fh->open (flags, (mode & 07777) & ~cygheap->umask)) - { - delete fh; - res = -1; - } - else - { - cygheap->fdtab[fd] = fh; - if ((res = fd) <= 2) - set_std_handle (res); - } - } - } - - syscall_printf ("%d = open (%s, %p)", res, unix_path, flags); - return res; -} - -EXPORT_ALIAS (open, _open ) -EXPORT_ALIAS (open, _open64 ) - -extern "C" _off64_t -lseek64 (int fd, _off64_t pos, int dir) -{ - _off64_t res; - - if (dir != SEEK_SET && dir != SEEK_CUR && dir != SEEK_END) - { - set_errno (EINVAL); - res = -1; - } - else - { - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = cfd->lseek (pos, dir); - else - res = -1; - } - syscall_printf ("%D = lseek (%d, %D, %d)", res, fd, pos, dir); - - return res; -} - -EXPORT_ALIAS (lseek64, _lseek64) - -extern "C" _off_t -lseek (int fd, _off_t pos, int dir) -{ - return lseek64 (fd, (_off64_t) pos, dir); -} - -EXPORT_ALIAS (lseek, _lseek) - -extern "C" int -close (int fd) -{ - int res; - - syscall_printf ("close (%d)", fd); - - MALLOC_CHECK; - cygheap_fdget cfd (fd, true); - if (cfd < 0) - res = -1; - else - { - res = cfd->close (); - cfd.release (); - } - - syscall_printf ("%d = close (%d)", res, fd); - MALLOC_CHECK; - return res; -} - -EXPORT_ALIAS (close, _close) - -extern "C" int -isatty (int fd) -{ - int res; - - cygheap_fdget cfd (fd); - if (cfd < 0) - res = 0; - else - res = cfd->is_tty (); - syscall_printf ("%d = isatty (%d)", res, fd); - return res; -} -EXPORT_ALIAS (isatty, _isatty) - -/* Under NT, try to make a hard link using backup API. If that - fails or we are Win 95, just copy the file. - FIXME: We should actually be checking partition type, not OS. - Under NTFS, we should support hard links. On FAT partitions, - we should just copy the file. -*/ - -extern "C" int -link (const char *oldpath, const char *newpath) -{ - int res = -1; - fhandler_base *fh; - - if (!(fh = build_fh_name (oldpath, NULL, PC_SYM_NOFOLLOW, stat_suffixes))) - goto error; - - if (fh->error ()) - { - debug_printf ("got %d error from build_fh_name", fh->error ()); - set_errno (fh->error ()); - } - else - res = fh->link (newpath); - - delete fh; - error: - syscall_printf ("%d = link (%s, %s)", res, oldpath, newpath); - return res; -} - -/* chown: POSIX 5.6.5.1 */ -/* - * chown () is only implemented for Windows NT. Under other operating - * systems, it is only a stub that always returns zero. - */ -static int -chown_worker (const char *name, unsigned fmode, __uid32_t uid, __gid32_t gid) -{ - int res = -1; - fhandler_base *fh; - - if (!(fh = build_fh_name (name, NULL, fmode, stat_suffixes))) - goto error; - - if (fh->error ()) - { - debug_printf ("got %d error from build_fh_name", fh->error ()); - set_errno (fh->error ()); - } - else - res = fh->fchown (uid, gid); - - delete fh; - error: - syscall_printf ("%d = %schown (%s,...)", - res, (fmode & PC_SYM_NOFOLLOW) ? "l" : "", name); - return res; -} - -extern "C" int -chown32 (const char * name, __uid32_t uid, __gid32_t gid) -{ - return chown_worker (name, PC_SYM_FOLLOW, uid, gid); -} - -extern "C" int -chown (const char * name, __uid16_t uid, __gid16_t gid) -{ - return chown_worker (name, PC_SYM_FOLLOW, - uid16touid32 (uid), gid16togid32 (gid)); -} - -extern "C" int -lchown32 (const char * name, __uid32_t uid, __gid32_t gid) -{ - return chown_worker (name, PC_SYM_NOFOLLOW, uid, gid); -} - -extern "C" int -lchown (const char * name, __uid16_t uid, __gid16_t gid) -{ - return chown_worker (name, PC_SYM_NOFOLLOW, - uid16touid32 (uid), gid16togid32 (gid)); -} - -extern "C" int -fchown32 (int fd, __uid32_t uid, __gid32_t gid) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fchown (%d,...)", fd); - return -1; - } - - int res = cfd->fchown (uid, gid); - - syscall_printf ("%d = fchown (%s,...)", res, cfd->get_name ()); - return res; -} - -extern "C" int -fchown (int fd, __uid16_t uid, __gid16_t gid) -{ - return fchown32 (fd, uid16touid32 (uid), gid16togid32 (gid)); -} - -/* umask: POSIX 5.3.3.1 */ -extern "C" mode_t -umask (mode_t mask) -{ - mode_t oldmask; - - oldmask = cygheap->umask; - cygheap->umask = mask & 0777; - return oldmask; -} - -int -chmod_device (path_conv& pc, mode_t mode) -{ - return mknod_worker (pc.get_win32 (), pc.dev.mode & S_IFMT, mode, pc.dev.major, pc.dev.minor); -} - -#define FILTERED_MODE(m) ((m) & (S_ISUID | S_ISGID | S_ISVTX \ - | S_IRWXU | S_IRWXG | S_IRWXO)) - -/* chmod: POSIX 5.6.4.1 */ -extern "C" int -chmod (const char *path, mode_t mode) -{ - int res = -1; - fhandler_base *fh; - if (!(fh = build_fh_name (path, NULL, PC_SYM_FOLLOW, stat_suffixes))) - goto error; - - if (fh->error ()) - { - debug_printf ("got %d error from build_fh_name", fh->error ()); - set_errno (fh->error ()); - } - else - res = fh->fchmod (FILTERED_MODE (mode)); - - delete fh; - error: - syscall_printf ("%d = chmod (%s, %p)", res, path, mode); - return res; -} - -/* fchmod: P96 5.6.4.1 */ - -extern "C" int -fchmod (int fd, mode_t mode) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fchmod (%d, 0%o)", fd, mode); - return -1; - } - - return cfd->fchmod (FILTERED_MODE (mode)); -} - -static void -stat64_to_stat32 (struct __stat64 *src, struct __stat32 *dst) -{ - dst->st_dev = ((src->st_dev >> 8) & 0xff00) | (src->st_dev & 0xff); - dst->st_ino = ((unsigned) (src->st_ino >> 32)) | (unsigned) src->st_ino; - dst->st_mode = src->st_mode; - dst->st_nlink = src->st_nlink; - dst->st_uid = src->st_uid; - dst->st_gid = src->st_gid; - dst->st_rdev = ((src->st_rdev >> 8) & 0xff00) | (src->st_rdev & 0xff); - dst->st_size = src->st_size; - dst->st_atim = src->st_atim; - dst->st_mtim = src->st_mtim; - dst->st_ctim = src->st_ctim; - dst->st_blksize = src->st_blksize; - dst->st_blocks = src->st_blocks; -} - -extern "C" int -fstat64 (int fd, struct __stat64 *buf) -{ - int res; - - cygheap_fdget cfd (fd); - if (cfd < 0) - res = -1; - else - { - memset (buf, 0, sizeof (struct __stat64)); - res = cfd->fstat (buf); - if (!res) - { - if (!buf->st_ino) - buf->st_ino = cfd->get_ino (); - if (!buf->st_dev) - buf->st_dev = cfd->get_device (); - if (!buf->st_rdev) - buf->st_rdev = buf->st_dev; - } - } - - syscall_printf ("%d = fstat (%d, %p)", res, fd, buf); - return res; -} - -extern "C" int -_fstat64_r (struct _reent *ptr, int fd, struct __stat64 *buf) -{ - int ret; - - if ((ret = fstat64 (fd, buf)) == -1) - ptr->_errno = get_errno (); - return ret; -} - -extern "C" int -fstat (int fd, struct __stat32 *buf) -{ - struct __stat64 buf64; - int ret = fstat64 (fd, &buf64); - if (!ret) - stat64_to_stat32 (&buf64, buf); - return ret; -} - -extern "C" int -_fstat_r (struct _reent *ptr, int fd, struct __stat32 *buf) -{ - int ret; - - if ((ret = fstat (fd, buf)) == -1) - ptr->_errno = get_errno (); - return ret; -} - -/* fsync: P96 6.6.1.1 */ -extern "C" int -fsync (int fd) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fsync (%d)", fd); - return -1; - } - return cfd->fsync (); -} - -EXPORT_ALIAS (fsync, fdatasync) - -static void -sync_worker (const char *vol) -{ - HANDLE fh = CreateFileA (vol, GENERIC_WRITE, FILE_SHARE_VALID_FLAGS, - &sec_none_nih, OPEN_EXISTING, 0, NULL); - if (fh != INVALID_HANDLE_VALUE) - { - FlushFileBuffers (fh); - CloseHandle (fh); - } - else - debug_printf ("Open failed with %E"); -} - -/* sync: SUSv3 */ -extern "C" void -sync () -{ - /* Per MSDN, 50 bytes should be enough here. */ - char vol[MAX_PATH]; - - if (wincap.has_guid_volumes ()) /* Win2k and newer */ - { - char a_drive[MAX_PATH] = {0}; - char b_drive[MAX_PATH] = {0}; - - if (is_floppy ("A:")) - GetVolumeNameForVolumeMountPointA ("A:\\", a_drive, MAX_PATH); - if (is_floppy ("B:")) - GetVolumeNameForVolumeMountPointA ("B:\\", b_drive, MAX_PATH); - - HANDLE sh = FindFirstVolumeA (vol, MAX_PATH); - if (sh != INVALID_HANDLE_VALUE) - { - do - { - debug_printf ("Try volume %s", vol); - - /* Check vol for being a floppy on A: or B:. Skip them. */ - if (strcasematch (vol, a_drive) || strcasematch (vol, b_drive)) - { - debug_printf ("Is floppy, don't sync"); - continue; - } - - /* Eliminate trailing backslash. */ - vol[strlen (vol) - 1] = '\0'; - sync_worker (vol); - } - while (FindNextVolumeA (sh, vol, MAX_PATH)); - FindVolumeClose (sh); - } - } - else - { - DWORD drives = GetLogicalDrives (); - DWORD mask = 1; - /* Skip floppies on A: and B: as in setmntent. */ - if ((drives & 1) && is_floppy ("A:")) - drives &= ~1; - if ((drives & 2) && is_floppy ("B:")) - drives &= ~2; - strcpy (vol, "\\\\.\\A:"); - do - { - /* Geeh. Try to sync only non-floppy drives. */ - if (drives & mask) - { - debug_printf ("Try volume %s", vol); - sync_worker (vol); - } - vol[4]++; - } - while ((mask <<= 1) <= 1 << 25); - } -} - -/* Cygwin internal */ -int __stdcall -stat_worker (path_conv &pc, struct __stat64 *buf) -{ - int res = -1; - - myfault efault; - if (efault.faulted (EFAULT)) - goto error; - - if (pc.error) - { - debug_printf ("got %d error from build_fh_name", pc.error); - set_errno (pc.error); - } - else if (pc.exists ()) - { - fhandler_base *fh; - - if (!(fh = build_fh_pc (pc))) - goto error; - - debug_printf ("(%S, %p, %p), file_attributes %d", - pc.get_nt_native_path (), buf, fh, (DWORD) *fh); - memset (buf, 0, sizeof (*buf)); - res = fh->fstat (buf); - if (!res) - { - if (!buf->st_ino) - buf->st_ino = fh->get_ino (); - if (!buf->st_dev) - buf->st_dev = fh->get_device (); - if (!buf->st_rdev) - buf->st_rdev = buf->st_dev; - } - delete fh; - } - else - set_errno (ENOENT); - - error: - MALLOC_CHECK; - syscall_printf ("%d = (%S, %p)", res, pc.get_nt_native_path (), buf); - return res; -} - -extern "C" int -stat64 (const char *name, struct __stat64 *buf) -{ - syscall_printf ("entering"); - path_conv pc (name, PC_SYM_FOLLOW | PC_POSIX, stat_suffixes); - return stat_worker (pc, buf); -} - -extern "C" int -_stat64_r (struct _reent *ptr, const char *name, struct __stat64 *buf) -{ - int ret; - - if ((ret = stat64 (name, buf)) == -1) - ptr->_errno = get_errno (); - return ret; -} - -extern "C" int -stat (const char *name, struct __stat32 *buf) -{ - struct __stat64 buf64; - int ret = stat64 (name, &buf64); - if (!ret) - stat64_to_stat32 (&buf64, buf); - return ret; -} - -extern "C" int -_stat_r (struct _reent *ptr, const char *name, struct __stat32 *buf) -{ - int ret; - - if ((ret = stat (name, buf)) == -1) - ptr->_errno = get_errno (); - return ret; -} - -/* lstat: Provided by SVR4 and 4.3+BSD, POSIX? */ -extern "C" int -lstat64 (const char *name, struct __stat64 *buf) -{ - syscall_printf ("entering"); - path_conv pc (name, PC_SYM_NOFOLLOW | PC_POSIX, stat_suffixes); - return stat_worker (pc, buf); -} - -/* lstat: Provided by SVR4 and 4.3+BSD, POSIX? */ -extern "C" int -lstat (const char *name, struct __stat32 *buf) -{ - struct __stat64 buf64; - int ret = lstat64 (name, &buf64); - if (!ret) - stat64_to_stat32 (&buf64, buf); - return ret; -} - -extern "C" int -access (const char *fn, int flags) -{ - // flags were incorrectly specified - int res = -1; - if (flags & ~(F_OK|R_OK|W_OK|X_OK)) - set_errno (EINVAL); - else - { - fhandler_base *fh = build_fh_name (fn, NULL, PC_SYM_FOLLOW, stat_suffixes); - if (fh) - { - res = fh->fhaccess (flags); - delete fh; - } - } - debug_printf ("returning %d", res); - return res; -} - -static void -rename_append_suffix (path_conv &pc, const char *path, size_t len, - const char *suffix) -{ - char buf[len + 5]; - - if (ascii_strcasematch (path + len - 4, ".lnk") - || ascii_strcasematch (path + len - 4, ".exe")) - len -= 4; - stpcpy (stpncpy (buf, path, len), suffix); - pc.check (buf, PC_SYM_NOFOLLOW); -} - -static void -start_transaction (HANDLE &old_trans, HANDLE &trans) -{ - NTSTATUS status = NtCreateTransaction (&trans, - SYNCHRONIZE | TRANSACTION_ALL_ACCESS, - NULL, NULL, NULL, 0, 0, 0, NULL, NULL); - if (NT_SUCCESS (status)) - { - old_trans = RtlGetCurrentTransaction (); - RtlSetCurrentTransaction (trans); - } - else - { - debug_printf ("NtCreateTransaction failed, %p", status); - old_trans = trans = NULL; - } -} - -static NTSTATUS -stop_transaction (NTSTATUS status, HANDLE old_trans, HANDLE trans) -{ - RtlSetCurrentTransaction (old_trans); - if (NT_SUCCESS (status)) - status = NtCommitTransaction (trans, TRUE); - else - status = NtRollbackTransaction (trans, TRUE); - NtClose (trans); - return status; -} - -extern "C" int -rename (const char *oldpath, const char *newpath) -{ - tmp_pathbuf tp; - int res = -1; - char *oldbuf, *newbuf; - path_conv oldpc, newpc, new2pc, *dstpc, *removepc = NULL; - bool old_dir_requested = false, new_dir_requested = false; - bool old_explicit_suffix = false, new_explicit_suffix = false; - size_t olen, nlen; - bool equal_path; - NTSTATUS status = 0; - HANDLE fh = NULL, nfh; - HANDLE old_trans = NULL, trans = NULL; - OBJECT_ATTRIBUTES attr; - IO_STATUS_BLOCK io; - ULONG size; - FILE_STANDARD_INFORMATION ofsi; - PFILE_RENAME_INFORMATION pfri; - - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - if (has_dot_last_component (oldpath, true)) - { - oldpc.check (oldpath, PC_SYM_NOFOLLOW, stat_suffixes); - set_errno (oldpc.isdir () ? EBUSY : ENOTDIR); - goto out; - } - if (has_dot_last_component (newpath, true)) - { - newpc.check (newpath, PC_SYM_NOFOLLOW, stat_suffixes); - set_errno (!newpc.exists () ? ENOENT : newpc.isdir () ? EBUSY : ENOTDIR); - goto out; - } - - /* A trailing slash requires that the pathname points to an existing - directory. If it's not, it's a ENOTDIR condition. The same goes - for newpath a bit further down this function. */ - olen = strlen (oldpath); - if (isdirsep (oldpath[olen - 1])) - { - stpcpy (oldbuf = tp.c_get (), oldpath); - while (olen > 0 && isdirsep (oldbuf[olen - 1])) - oldbuf[--olen] = '\0'; - oldpath = oldbuf; - old_dir_requested = true; - } - oldpc.check (oldpath, PC_SYM_NOFOLLOW, stat_suffixes); - if (oldpc.error) - { - set_errno (oldpc.error); - goto out; - } - if (!oldpc.exists ()) - { - set_errno (ENOENT); - goto out; - } - if (oldpc.isspecial ()) /* No renames from virtual FS */ - { - set_errno (EROFS); - goto out; - } - if (old_dir_requested && !oldpc.isdir ()) - { - set_errno (ENOTDIR); - goto out; - } - if (oldpc.known_suffix - && (ascii_strcasematch (oldpath + olen - 4, ".lnk") - || ascii_strcasematch (oldpath + olen - 4, ".exe"))) - old_explicit_suffix = true; - - nlen = strlen (newpath); - if (isdirsep (newpath[nlen - 1])) - { - stpcpy (newbuf = tp.c_get (), newpath); - while (nlen > 0 && isdirsep (newbuf[nlen - 1])) - newbuf[--nlen] = '\0'; - newpath = newbuf; - new_dir_requested = true; - } - newpc.check (newpath, PC_SYM_NOFOLLOW, stat_suffixes); - if (newpc.error) - { - set_errno (newpc.error); - goto out; - } - if (newpc.isspecial ()) /* No renames to virtual FSes */ - { - set_errno (EROFS); - goto out; - } - if (new_dir_requested && !newpc.isdir ()) - { - set_errno (ENOTDIR); - goto out; - } - if (newpc.known_suffix - && (ascii_strcasematch (newpath + nlen - 4, ".lnk") - || ascii_strcasematch (newpath + nlen - 4, ".exe"))) - new_explicit_suffix = true; - - /* This test is necessary in almost every case, so just do it once here. */ - equal_path = RtlEqualUnicodeString (oldpc.get_nt_native_path (), - newpc.get_nt_native_path (), - oldpc.objcaseinsensitive ()); - - /* First check if oldpath and newpath only differ by case. If so, it's - just a request to change the case of the filename. By simply setting - the file attributes to INVALID_FILE_ATTRIBUTES (which translates to - "file doesn't exist"), all later tests are skipped. */ - if (oldpc.objcaseinsensitive () && newpc.exists () && equal_path) - { - if (RtlEqualUnicodeString (oldpc.get_nt_native_path (), - newpc.get_nt_native_path (), - FALSE)) - { - res = 0; - goto out; - } - newpc.file_attributes (INVALID_FILE_ATTRIBUTES); - } - else if (oldpc.isdir ()) - { - if (newpc.exists () && !newpc.isdir ()) - { - set_errno (ENOTDIR); - goto out; - } - /* Check for newpath being a subdir of oldpath. */ - if (RtlPrefixUnicodeString (oldpc.get_nt_native_path (), - newpc.get_nt_native_path (), - TRUE) - && newpc.get_nt_native_path ()->Length > - oldpc.get_nt_native_path ()->Length - && *(PWCHAR) ((PBYTE) newpc.get_nt_native_path ()->Buffer - + oldpc.get_nt_native_path ()->Length) == L'\\') - { - set_errno (EINVAL); - goto out; - } - } - else if (!newpc.exists ()) - { - if (equal_path && old_explicit_suffix != new_explicit_suffix) - { - newpc.check (newpath, PC_SYM_NOFOLLOW); - if (RtlEqualUnicodeString (oldpc.get_nt_native_path (), - newpc.get_nt_native_path (), - oldpc.objcaseinsensitive ())) - { - res = 0; - goto out; - } - } - else if (oldpc.is_lnk_symlink () - && !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".lnk", TRUE)) - rename_append_suffix (newpc, newpath, nlen, ".lnk"); - else if (oldpc.is_binary () && !old_explicit_suffix - && !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".exe", TRUE)) - /* To rename an executable foo.exe to bar-without-exe-suffix, the - .exe suffix must be given explicitly in oldpath. */ - rename_append_suffix (newpc, newpath, nlen, ".exe"); - } - else if (newpc.isdir ()) - { - set_errno (EISDIR); - goto out; - } - else - { - if (equal_path && old_explicit_suffix != new_explicit_suffix) - { - newpc.check (newpath, PC_SYM_NOFOLLOW); - if (RtlEqualUnicodeString (oldpc.get_nt_native_path (), - newpc.get_nt_native_path (), - oldpc.objcaseinsensitive ())) - { - res = 0; - goto out; - } - } - else if (oldpc.is_lnk_symlink ()) - { - if (!newpc.is_lnk_symlink () - && !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".lnk", TRUE)) - { - rename_append_suffix (new2pc, newpath, nlen, ".lnk"); - removepc = &newpc; - } - } - else if (oldpc.is_binary ()) - { - if (!RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".exe", TRUE)) - { - rename_append_suffix (new2pc, newpath, nlen, ".exe"); - removepc = &newpc; - } - } - else - { - if ((RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".lnk", TRUE) - || RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (), - L".exe", TRUE)) - && !new_explicit_suffix) - { - new2pc.check (newpath, PC_SYM_NOFOLLOW, stat_suffixes); - newpc.get_nt_native_path ()->Length -= 4 * sizeof (WCHAR); - if (new2pc.is_binary () || new2pc.is_lnk_symlink ()) - removepc = &new2pc; - } - } - } - dstpc = (removepc == &newpc) ? &new2pc : &newpc; - - /* Opening the file must be part of the transaction. It's not sufficient - to call only NtSetInformationFile under the transaction. Therefore we - have to start the transaction here, if necessary. */ - if (wincap.has_transactions () - && (dstpc->fs_flags () & FILE_SUPPORTS_TRANSACTIONS) - && (dstpc->isdir () - || (!removepc && dstpc->has_attribute (FILE_ATTRIBUTE_READONLY)))) - start_transaction (old_trans, trans); - - /* DELETE is required to rename a file. */ - status = NtOpenFile (&fh, DELETE, oldpc.get_object_attr (attr, sec_none_nih), - &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | (oldpc.is_rep_symlink () ? FILE_OPEN_REPARSE_POINT : 0)); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto out; - } - - /* Renaming a dir to another, existing dir fails always, even if - ReplaceIfExists is set to TRUE and the existing dir is empty. So - we have to remove the destination dir first. This also covers the - case that the destination directory is not empty. In that case, - unlink_nt returns with STATUS_DIRECTORY_NOT_EMPTY. */ - if (dstpc->isdir ()) - { - status = unlink_nt (*dstpc); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto out; - } - } - /* You can't copy a file if the destination exists and has the R/O - attribute set. Remove the R/O attribute first. But first check - if a removepc exists. If so, dstpc points to a non-existing file - due to a mangled suffix. */ - else if (!removepc && dstpc->has_attribute (FILE_ATTRIBUTE_READONLY)) - { - status = NtOpenFile (&nfh, FILE_WRITE_ATTRIBUTES, - dstpc->get_object_attr (attr, sec_none_nih), - &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | (dstpc->is_rep_symlink () - ? FILE_OPEN_REPARSE_POINT : 0)); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto out; - } - FILE_BASIC_INFORMATION fbi; - fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart = - fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; - fbi.FileAttributes = (dstpc->file_attributes () - & ~FILE_ATTRIBUTE_READONLY) - ?: FILE_ATTRIBUTE_NORMAL; - status = NtSetInformationFile (nfh, &io, &fbi, sizeof fbi, - FileBasicInformation); - NtClose (nfh); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto out; - } - } - - /* SUSv3: If the old argument and the new argument resolve to the same - existing file, rename() shall return successfully and perform no - other action. - The test tries to be as quick as possible. First it tests for identical - volume serial numbers because that information is available anyway. - Then it tests if oldpath has more than 1 hardlink, then it opens newpath - and tests for identical file ids. If so, oldpath and newpath refer to - the same file. */ - if ((removepc || dstpc->exists ()) - && !oldpc.isdir () - && dstpc->fs_serial_number () == oldpc.fs_serial_number () - && NT_SUCCESS (NtQueryInformationFile (fh, &io, &ofsi, sizeof ofsi, - FileStandardInformation)) - && ofsi.NumberOfLinks > 1 - && NT_SUCCESS (NtOpenFile (&nfh, READ_CONTROL, - (removepc ?: dstpc)->get_object_attr (attr, sec_none_nih), - &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | ((removepc ?: dstpc)->is_rep_symlink () - ? FILE_OPEN_REPARSE_POINT : 0)))) - { - FILE_INTERNAL_INFORMATION ofii, nfii; - - if (NT_SUCCESS (NtQueryInformationFile (fh, &io, &ofii, sizeof ofii, - FileInternalInformation)) - && NT_SUCCESS (NtQueryInformationFile (nfh, &io, &nfii, sizeof nfii, - FileInternalInformation)) - && ofii.FileId.QuadPart == nfii.FileId.QuadPart) - { - debug_printf ("%s and %s are the same file", oldpath, newpath); - NtClose (nfh); - res = 0; - goto out; - } - NtClose (nfh); - } - size = sizeof (FILE_RENAME_INFORMATION) - + dstpc->get_nt_native_path ()->Length; - if (size > NT_MAX_PATH * sizeof (WCHAR)) /* Hopefully very seldom. */ - pfri = (PFILE_RENAME_INFORMATION) alloca (size); - else - pfri = (PFILE_RENAME_INFORMATION) tp.w_get (); - pfri->ReplaceIfExists = TRUE; - pfri->RootDirectory = NULL; - pfri->FileNameLength = dstpc->get_nt_native_path ()->Length; - memcpy (&pfri->FileName, dstpc->get_nt_native_path ()->Buffer, - pfri->FileNameLength); - status = NtSetInformationFile (fh, &io, pfri, size, FileRenameInformation); - /* This happens if the access rights don't allow deleting the destination. - Even if the handle to the original file is opened with BACKUP - and/or RECOVERY, these flags don't apply to the destination of the - rename operation. So, a privileged user can't rename a file to an - existing file, if the permissions of the existing file aren't right. - Like directories, we have to handle this separately by removing the - destination before renaming. */ - if (status == STATUS_ACCESS_DENIED && dstpc->exists () && !dstpc->isdir ()) - { - if (wincap.has_transactions () - && (dstpc->fs_flags () & FILE_SUPPORTS_TRANSACTIONS) - && !trans) - { - start_transaction (old_trans, trans); - /* As mentioned earlier, opening the file must be part of the - transaction. Therefore we have to reopen the file here if the - transaction hasn't been started already. Unfortunately we can't - use the NT "reopen file from existing handle" feature. In that - case NtOpenFile returns STATUS_TRANSACTIONAL_CONFLICT. We *have* - to close the handle to the file first, *then* we can re-open it. - Fortunately nothing has happened yet, so the atomicity of the - rename functionality is not spoiled. */ - NtClose (fh); - status = NtOpenFile (&fh, DELETE, - oldpc.get_object_attr (attr, sec_none_nih), - &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | (oldpc.is_rep_symlink () - ? FILE_OPEN_REPARSE_POINT : 0)); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto out; - } - } - if (NT_SUCCESS (status = unlink_nt (*dstpc))) - status = NtSetInformationFile (fh, &io, pfri, size, - FileRenameInformation); - } - if (NT_SUCCESS (status)) - { - if (removepc) - unlink_nt (*removepc); - res = 0; - } - else - __seterrno_from_nt_status (status); - -out: - if (fh) - NtClose (fh); - if (wincap.has_transactions () && trans) - stop_transaction (status, old_trans, trans); - syscall_printf ("%d = rename (%s, %s)", res, oldpath, newpath); - return res; -} - -extern "C" int -system (const char *cmdstring) -{ - pthread_testcancel (); - - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - int res; - const char* command[4]; - - if (cmdstring == NULL) - return 1; - - command[0] = "sh"; - command[1] = "-c"; - command[2] = cmdstring; - command[3] = (const char *) NULL; - - if ((res = spawnvp (_P_SYSTEM, "/bin/sh", command)) == -1) - { - // when exec fails, return value should be as if shell - // executed exit (127) - res = 127; - } - - return res; -} - -extern "C" int -setdtablesize (int size) -{ - if (size <= (int)cygheap->fdtab.size || cygheap->fdtab.extend (size - cygheap->fdtab.size)) - return 0; - - return -1; -} - -extern "C" int -getdtablesize () -{ - return cygheap->fdtab.size > OPEN_MAX ? cygheap->fdtab.size : OPEN_MAX; -} - -extern "C" size_t -getpagesize () -{ - if (!system_info.dwAllocationGranularity) - GetSystemInfo (&system_info); - return (size_t) system_info.dwAllocationGranularity; -} - -size_t -getsystempagesize () -{ - if (!system_info.dwPageSize) - GetSystemInfo (&system_info); - return (size_t) system_info.dwPageSize; -} - -/* FIXME: not all values are correct... */ -extern "C" long int -fpathconf (int fd, int v) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - return cfd->fpathconf (v); -} - -extern "C" long int -pathconf (const char *file, int v) -{ - fhandler_base *fh; - - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - if (!*file) - { - set_errno (ENOENT); - return -1; - } - if (!(fh = build_fh_name (file, NULL, PC_SYM_FOLLOW, stat_suffixes))) - return -1; - if (!fh->exists ()) - { - set_errno (ENOENT); - return -1; - } - return fh->fpathconf (v); -} - -extern "C" int -ttyname_r (int fd, char *buf, size_t buflen) -{ - int ret = 0; - myfault efault; - if (efault.faulted ()) - ret = EFAULT; - else - { - cygheap_fdget cfd (fd, true); - if (cfd < 0) - ret = EBADF; - else if (!cfd->is_tty ()) - ret = ENOTTY; - else if (buflen < strlen (cfd->ttyname ()) + 1) - ret = ERANGE; - else - strcpy (buf, cfd->ttyname ()); - } - debug_printf ("returning %d tty: %s", ret, ret ? "NULL" : buf); - return ret; -} - -extern "C" char * -ttyname (int fd) -{ - static char name[TTY_NAME_MAX]; - int ret = ttyname_r (fd, name, TTY_NAME_MAX); - if (ret) - { - set_errno (ret); - return NULL; - } - return name; -} - -extern "C" char * -ctermid (char *str) -{ - static NO_COPY char buf[16]; - if (str == NULL) - str = buf; - if (!real_tty_attached (myself)) - strcpy (str, "/dev/conin"); - else - __small_sprintf (str, "/dev/tty%d", myself->ctty); - return str; -} - -/* Tells stdio if it should do the cr/lf conversion for this file */ -extern "C" int -_cygwin_istext_for_stdio (int fd) -{ - if (CYGWIN_VERSION_OLD_STDIO_CRLF_HANDLING) - { - syscall_printf ("fd %d: old API", fd); - return 0; /* we do it for old apps, due to getc/putc macros */ - } - - cygheap_fdget cfd (fd, false, false); - if (cfd < 0) - { - syscall_printf ("fd %d: not open", fd); - return 0; - } - -#if 0 - if (cfd->get_device () != FH_FS) - { - syscall_printf ("fd not disk file. Defaulting to binary."); - return 0; - } -#endif - - if (cfd->wbinary () || cfd->rbinary ()) - { - syscall_printf ("fd %d: opened as binary", fd); - return 0; - } - - syscall_printf ("fd %d: defaulting to text", fd); - return 1; -} - -/* internal newlib function */ -extern "C" int _fwalk (struct _reent *ptr, int (*function) (FILE *)); - -static int -setmode_helper (FILE *f) -{ - if (fileno (f) != _my_tls.locals.setmode_file) - { - syscall_printf ("improbable, but %d != %d", fileno (f), _my_tls.locals.setmode_file); - return 0; - } - syscall_printf ("file was %s now %s", f->_flags & __SCLE ? "text" : "binary", - _my_tls.locals.setmode_mode & O_TEXT ? "text" : "binary"); - if (_my_tls.locals.setmode_mode & O_TEXT) - f->_flags |= __SCLE; - else - f->_flags &= ~__SCLE; - return 0; -} - -extern "C" int -getmode (int fd) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - - return cfd->get_flags () & (O_BINARY | O_TEXT); -} - -/* Set a file descriptor into text or binary mode, returning the - previous mode. */ - -extern "C" int -setmode (int fd, int mode) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - if (mode != O_BINARY && mode != O_TEXT && mode != 0) - { - set_errno (EINVAL); - return -1; - } - - /* Note that we have no way to indicate the case that writes are - binary but not reads, or vice-versa. These cases can arise when - using the tty or console interface. People using those - interfaces should not use setmode. */ - - int res; - if (cfd->wbinary () && cfd->rbinary ()) - res = O_BINARY; - else if (cfd->wbinset () && cfd->rbinset ()) - res = O_TEXT; /* Specifically set O_TEXT */ - else - res = 0; - - if (!mode) - cfd->reset_to_open_binmode (); - else - cfd->set_flags ((cfd->get_flags () & ~(O_TEXT | O_BINARY)) | mode); - - syscall_printf ("(%d<%S>, %p) returning %s", fd, - cfd->pc.get_nt_native_path (), mode, - res & O_TEXT ? "text" : "binary"); - return res; -} - -extern "C" int -cygwin_setmode (int fd, int mode) -{ - int res = setmode (fd, mode); - if (res != -1) - { - _my_tls.locals.setmode_file = fd; - if (_cygwin_istext_for_stdio (fd)) - _my_tls.locals.setmode_mode = O_TEXT; - else - _my_tls.locals.setmode_mode = O_BINARY; - _fwalk (_GLOBAL_REENT, setmode_helper); - } - return res; -} - -extern "C" int -posix_fadvise (int fd, _off64_t offset, _off64_t len, int advice) -{ - int res = -1; - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = cfd->fadvise (offset, len, advice); - else - set_errno (EBADF); - syscall_printf ("%d = posix_fadvice (%d, %D, %D, %d)", - res, fd, offset, len, advice); - return res; -} - -extern "C" int -posix_fallocate (int fd, _off64_t offset, _off64_t len) -{ - int res = -1; - if (offset < 0 || len == 0) - set_errno (EINVAL); - else - { - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = cfd->ftruncate (offset + len, false); - else - set_errno (EBADF); - } - syscall_printf ("%d = posix_fallocate (%d, %D, %D)", res, fd, offset, len); - return res; -} - -extern "C" int -ftruncate64 (int fd, _off64_t length) -{ - int res = -1; - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = cfd->ftruncate (length, true); - else - set_errno (EBADF); - syscall_printf ("%d = ftruncate (%d, %D)", res, fd, length); - return res; -} - -/* ftruncate: P96 5.6.7.1 */ -extern "C" int -ftruncate (int fd, _off_t length) -{ - return ftruncate64 (fd, (_off64_t)length); -} - -/* truncate: Provided by SVR4 and 4.3+BSD. Not part of POSIX.1 or XPG3 */ -extern "C" int -truncate64 (const char *pathname, _off64_t length) -{ - int fd; - int res = -1; - - fd = open (pathname, O_RDWR); - - if (fd != -1) - { - res = ftruncate64 (fd, length); - close (fd); - } - syscall_printf ("%d = truncate (%s, %D)", res, pathname, length); - - return res; -} - -/* truncate: Provided by SVR4 and 4.3+BSD. Not part of POSIX.1 or XPG3 */ -extern "C" int -truncate (const char *pathname, _off_t length) -{ - return truncate64 (pathname, (_off64_t)length); -} - -extern "C" long -get_osfhandle (int fd) -{ - long res; - - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = (long) cfd->get_handle (); - else - res = -1; - - syscall_printf ("%d = get_osfhandle (%d)", res, fd); - return res; -} - -extern "C" int -fstatvfs (int fd, struct statvfs *sfs) -{ - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - return cfd->fstatvfs (sfs); -} - -extern "C" int -statvfs (const char *name, struct statvfs *sfs) -{ - int res = -1; - fhandler_base *fh = NULL; - - myfault efault; - if (efault.faulted (EFAULT)) - goto error; - - if (!(fh = build_fh_name (name, NULL, PC_SYM_FOLLOW, stat_suffixes))) - goto error; - - if (fh->error ()) - { - debug_printf ("got %d error from build_fh_name", fh->error ()); - set_errno (fh->error ()); - } - else if (fh->exists ()) - { - debug_printf ("(%s, %p), file_attributes %d", name, sfs, (DWORD) *fh); - res = fh->fstatvfs (sfs); - } - else - set_errno (ENOENT); - - delete fh; - error: - MALLOC_CHECK; - syscall_printf ("%d = (%s, %p)", res, name, sfs); - return res; -} - -extern "C" int -fstatfs (int fd, struct statfs *sfs) -{ - struct statvfs vfs; - int ret = fstatvfs (fd, &vfs); - if (!ret) - { - sfs->f_type = vfs.f_flag; - sfs->f_bsize = vfs.f_bsize; - sfs->f_blocks = vfs.f_blocks; - sfs->f_bavail = vfs.f_bavail; - sfs->f_bfree = vfs.f_bfree; - sfs->f_files = -1; - sfs->f_ffree = -1; - sfs->f_fsid = vfs.f_fsid; - sfs->f_namelen = vfs.f_namemax; - } - return ret; -} - -extern "C" int -statfs (const char *fname, struct statfs *sfs) -{ - struct statvfs vfs; - int ret = statvfs (fname, &vfs); - if (!ret) - { - sfs->f_type = vfs.f_flag; - sfs->f_bsize = vfs.f_bsize; - sfs->f_blocks = vfs.f_blocks; - sfs->f_bavail = vfs.f_bavail; - sfs->f_bfree = vfs.f_bfree; - sfs->f_files = -1; - sfs->f_ffree = -1; - sfs->f_fsid = vfs.f_fsid; - sfs->f_namelen = vfs.f_namemax; - } - return ret; -} - -/* setpgid: POSIX 4.3.3.1 */ -extern "C" int -setpgid (pid_t pid, pid_t pgid) -{ - int res = -1; - if (pid == 0) - pid = getpid (); - if (pgid == 0) - pgid = pid; - - if (pgid < 0) - set_errno (EINVAL); - else - { - pinfo p (pid, PID_MAP_RW); - if (!p) - set_errno (ESRCH); - else if (p->pgid == pgid) - res = 0; - /* A process may only change the process group of itself and its children */ - else if (p != myself && p->ppid != myself->pid) - set_errno (EPERM); - else - { - p->pgid = pgid; - if (p->pid != p->pgid) - p->set_has_pgid_children (0); - res = 0; - } - } - - syscall_printf ("pid %d, pgid %d, res %d", pid, pgid, res); - return res; -} - -extern "C" pid_t -getpgid (pid_t pid) -{ - if (pid == 0) - pid = getpid (); - - pinfo p (pid); - if (p == 0) - { - set_errno (ESRCH); - return -1; - } - return p->pgid; -} - -extern "C" int -setpgrp (void) -{ - return setpgid (0, 0); -} - -extern "C" pid_t -getpgrp (void) -{ - return getpgid (0); -} - -extern "C" char * -ptsname (int fd) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - return 0; - return (char *) (cfd->ptsname ()); -} - -static int __stdcall -mknod_worker (const char *path, mode_t type, mode_t mode, _major_t major, - _minor_t minor) -{ - char buf[sizeof (":\\00000000:00000000:00000000") + PATH_MAX]; - sprintf (buf, ":\\%x:%x:%x", major, minor, - type | (mode & (S_IRWXU | S_IRWXG | S_IRWXO))); - return symlink_worker (buf, path, true, true); -} - -extern "C" int -mknod32 (const char *path, mode_t mode, __dev32_t dev) -{ - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - if (!*path) - { - set_errno (ENOENT); - return -1; - } - - if (strlen (path) >= PATH_MAX) - return -1; - - path_conv w32path (path, PC_SYM_NOFOLLOW); - if (w32path.exists ()) - { - set_errno (EEXIST); - return -1; - } - - mode_t type = mode & S_IFMT; - _major_t major = _major (dev); - _minor_t minor = _minor (dev); - switch (type) - { - case S_IFCHR: - case S_IFBLK: - break; - - case S_IFIFO: - major = _major (FH_FIFO); - minor = _minor (FH_FIFO); - break; - - case 0: - case S_IFREG: - { - int fd = open (path, O_CREAT, mode); - if (fd < 0) - return -1; - close (fd); - return 0; - } - - default: - set_errno (EINVAL); - return -1; - } - - return mknod_worker (w32path.get_win32 (), type, mode, major, minor); -} - -extern "C" int -mknod (const char *_path, mode_t mode, __dev16_t dev) -{ - return mknod32 (_path, mode, (__dev32_t) dev); -} - -extern "C" int -mkfifo (const char *path, mode_t mode) -{ - return mknod32 (path, (mode & ~S_IFMT) | S_IFIFO, 0); -} - -/* seteuid: standards? */ -extern "C" int -seteuid32 (__uid32_t uid) -{ - debug_printf ("uid: %u myself->uid: %u myself->gid: %u", - uid, myself->uid, myself->gid); - - if (uid == myself->uid && !cygheap->user.groups.ischanged) - { - debug_printf ("Nothing happens"); - return 0; - } - - cygsid usersid; - user_groups &groups = cygheap->user.groups; - HANDLE new_token = INVALID_HANDLE_VALUE; - struct passwd * pw_new; - bool token_is_internal, issamesid = false; - - pw_new = internal_getpwuid (uid); - if (!usersid.getfrompw (pw_new)) - { - set_errno (EINVAL); - return -1; - } - - cygheap->user.deimpersonate (); - - /* Verify if the process token is suitable. */ - if (verify_token (hProcToken, usersid, groups)) - new_token = hProcToken; - /* Verify if the external token is suitable */ - else if (cygheap->user.external_token != NO_IMPERSONATION - && verify_token (cygheap->user.external_token, usersid, groups)) - new_token = cygheap->user.external_token; - /* Verify if the current token (internal or former external) is suitable */ - else if (cygheap->user.curr_primary_token != NO_IMPERSONATION - && cygheap->user.curr_primary_token != cygheap->user.external_token - && verify_token (cygheap->user.curr_primary_token, usersid, groups, - &token_is_internal)) - new_token = cygheap->user.curr_primary_token; - /* Verify if the internal token is suitable */ - else if (cygheap->user.internal_token != NO_IMPERSONATION - && cygheap->user.internal_token != cygheap->user.curr_primary_token - && verify_token (cygheap->user.internal_token, usersid, groups, - &token_is_internal)) - new_token = cygheap->user.internal_token; - - debug_printf ("Found token %d", new_token); - - /* If no impersonation token is available, try to - authenticate using NtCreateToken () or LSA authentication. */ - if (new_token == INVALID_HANDLE_VALUE) - { - if (!(new_token = lsaauth (usersid, groups, pw_new))) - { - debug_printf ("lsaauth failed, try create_token."); - new_token = create_token (usersid, groups, pw_new); - if (new_token == INVALID_HANDLE_VALUE) - { - debug_printf ("create_token failed, bail out of here"); - cygheap->user.reimpersonate (); - return -1; - } - } - - /* Keep at most one internal token */ - if (cygheap->user.internal_token != NO_IMPERSONATION) - CloseHandle (cygheap->user.internal_token); - cygheap->user.internal_token = new_token; - } - - if (new_token != hProcToken) - { - /* Avoid having HKCU use default user */ - WCHAR name[128]; - load_registry_hive (usersid.string (name)); - - /* Try setting owner to same value as user. */ - if (!SetTokenInformation (new_token, TokenOwner, - &usersid, sizeof usersid)) - debug_printf ("SetTokenInformation(user.token, TokenOwner), %E"); - /* Try setting primary group in token to current group */ - if (!SetTokenInformation (new_token, TokenPrimaryGroup, - &groups.pgsid, sizeof (cygsid))) - debug_printf ("SetTokenInformation(user.token, TokenPrimaryGroup), %E"); - /* Try setting default DACL */ - PACL dacl_buf = (PACL) alloca (MAX_DACL_LEN (5)); - if (sec_acl (dacl_buf, true, true, usersid)) - { - TOKEN_DEFAULT_DACL tdacl = { dacl_buf }; - if (!SetTokenInformation (new_token, TokenDefaultDacl, - &tdacl, sizeof (tdacl))) - debug_printf ("SetTokenInformation (TokenDefaultDacl), %E"); - } - } - - issamesid = (usersid == cygheap->user.sid ()); - cygheap->user.set_sid (usersid); - cygheap->user.curr_primary_token = new_token == hProcToken ? NO_IMPERSONATION - : new_token; - if (cygheap->user.curr_imp_token != NO_IMPERSONATION) - { - CloseHandle (cygheap->user.curr_imp_token); - cygheap->user.curr_imp_token = NO_IMPERSONATION; - } - if (cygheap->user.curr_primary_token != NO_IMPERSONATION) - { - if (!DuplicateTokenEx (cygheap->user.curr_primary_token, MAXIMUM_ALLOWED, - &sec_none, SecurityImpersonation, - TokenImpersonation, &cygheap->user.curr_imp_token)) - { - __seterrno (); - cygheap->user.curr_primary_token = NO_IMPERSONATION; - return -1; - } - set_cygwin_privileges (cygheap->user.curr_imp_token); - } - if (!cygheap->user.reimpersonate ()) - { - __seterrno (); - return -1; - } - - cygheap->user.set_name (pw_new->pw_name); - myself->uid = uid; - groups.ischanged = FALSE; - if (!issamesid) - /* Recreate and fill out the user shared region for a new user. */ - user_shared_create (true); - return 0; -} - -extern "C" int -seteuid (__uid16_t uid) -{ - return seteuid32 (uid16touid32 (uid)); -} - -/* setuid: POSIX 4.2.2.1 */ -extern "C" int -setuid32 (__uid32_t uid) -{ - int ret = seteuid32 (uid); - if (!ret) - cygheap->user.real_uid = myself->uid; - debug_printf ("real: %d, effective: %d", cygheap->user.real_uid, myself->uid); - return ret; -} - -extern "C" int -setuid (__uid16_t uid) -{ - return setuid32 (uid16touid32 (uid)); -} - -extern "C" int -setreuid32 (__uid32_t ruid, __uid32_t euid) -{ - int ret = 0; - bool tried = false; - __uid32_t old_euid = myself->uid; - - if (ruid != ILLEGAL_UID && cygheap->user.real_uid != ruid && euid != ruid) - tried = !(ret = seteuid32 (ruid)); - if (!ret && euid != ILLEGAL_UID) - ret = seteuid32 (euid); - if (tried && (ret || euid == ILLEGAL_UID) && seteuid32 (old_euid)) - system_printf ("Cannot restore original euid %u", old_euid); - if (!ret && ruid != ILLEGAL_UID) - cygheap->user.real_uid = ruid; - debug_printf ("real: %u, effective: %u", cygheap->user.real_uid, myself->uid); - return ret; -} - -extern "C" int -setreuid (__uid16_t ruid, __uid16_t euid) -{ - return setreuid32 (uid16touid32 (ruid), uid16touid32 (euid)); -} - -/* setegid: from System V. */ -extern "C" int -setegid32 (__gid32_t gid) -{ - debug_printf ("new egid: %u current: %u", gid, myself->gid); - - if (gid == myself->gid) - { - myself->gid = gid; - return 0; - } - - user_groups * groups = &cygheap->user.groups; - cygsid gsid; - struct __group32 * gr = internal_getgrgid (gid); - - if (!gsid.getfromgr (gr)) - { - set_errno (EINVAL); - return -1; - } - myself->gid = gid; - - groups->update_pgrp (gsid); - if (cygheap->user.issetuid ()) - { - /* If impersonated, update impersonation token... */ - if (!SetTokenInformation (cygheap->user.primary_token (), - TokenPrimaryGroup, &gsid, sizeof gsid)) - debug_printf ("SetTokenInformation(primary_token, " - "TokenPrimaryGroup), %E"); - if (!SetTokenInformation (cygheap->user.imp_token (), TokenPrimaryGroup, - &gsid, sizeof gsid)) - debug_printf ("SetTokenInformation(token, TokenPrimaryGroup), %E"); - } - cygheap->user.deimpersonate (); - if (!SetTokenInformation (hProcToken, TokenPrimaryGroup, &gsid, sizeof gsid)) - debug_printf ("SetTokenInformation(hProcToken, TokenPrimaryGroup), %E"); - clear_procimptoken (); - cygheap->user.reimpersonate (); - return 0; -} - -extern "C" int -setegid (__gid16_t gid) -{ - return setegid32 (gid16togid32 (gid)); -} - -/* setgid: POSIX 4.2.2.1 */ -extern "C" int -setgid32 (__gid32_t gid) -{ - int ret = setegid32 (gid); - if (!ret) - cygheap->user.real_gid = myself->gid; - return ret; -} - -extern "C" int -setgid (__gid16_t gid) -{ - int ret = setegid32 (gid16togid32 (gid)); - if (!ret) - cygheap->user.real_gid = myself->gid; - return ret; -} - -extern "C" int -setregid32 (__gid32_t rgid, __gid32_t egid) -{ - int ret = 0; - bool tried = false; - __gid32_t old_egid = myself->gid; - - if (rgid != ILLEGAL_GID && cygheap->user.real_gid != rgid && egid != rgid) - tried = !(ret = setegid32 (rgid)); - if (!ret && egid != ILLEGAL_GID) - ret = setegid32 (egid); - if (tried && (ret || egid == ILLEGAL_GID) && setegid32 (old_egid)) - system_printf ("Cannot restore original egid %u", old_egid); - if (!ret && rgid != ILLEGAL_GID) - cygheap->user.real_gid = rgid; - debug_printf ("real: %u, effective: %u", cygheap->user.real_gid, myself->gid); - return ret; -} - -extern "C" int -setregid (__gid16_t rgid, __gid16_t egid) -{ - return setregid32 (gid16togid32 (rgid), gid16togid32 (egid)); -} - -/* chroot: privileged Unix system call. */ -/* FIXME: Not privileged here. How should this be done? */ -extern "C" int -chroot (const char *newroot) -{ - path_conv path (newroot, PC_SYM_FOLLOW | PC_POSIX); - - int ret = -1; - if (path.error) - set_errno (path.error); - else if (!path.exists ()) - set_errno (ENOENT); - else if (!path.isdir ()) - set_errno (ENOTDIR); - else if (path.isspecial ()) - set_errno (EPERM); - else - { - getwinenv("PATH="); /* Save the native PATH */ - cygheap->root.set (path.normalized_path, path.get_win32 (), - !!path.objcaseinsensitive ()); - ret = 0; - } - - syscall_printf ("%d = chroot (%s)", ret ? get_errno () : 0, - newroot ? newroot : "NULL"); - return ret; -} - -extern "C" int -creat (const char *path, mode_t mode) -{ - return open (path, O_WRONLY | O_CREAT | O_TRUNC, mode); -} - -extern "C" void -__assertfail () -{ - exit (99); -} - -extern "C" int -vhangup () -{ - set_errno (ENOSYS); - return -1; -} - -extern "C" int -setpriority (int which, id_t who, int value) -{ - DWORD prio = nice_to_winprio (value); - int error = 0; - - switch (which) - { - case PRIO_PROCESS: - if (!who) - who = myself->pid; - if ((pid_t) who == myself->pid) - { - if (!SetPriorityClass (hMainProc, prio)) - { - set_errno (EACCES); - return -1; - } - myself->nice = value; - debug_printf ("Set nice to %d", myself->nice); - return 0; - } - break; - case PRIO_PGRP: - if (!who) - who = myself->pgid; - break; - case PRIO_USER: - if (!who) - who = myself->uid; - break; - default: - set_errno (EINVAL); - return -1; - } - winpids pids ((DWORD) PID_MAP_RW); - for (DWORD i = 0; i < pids.npids; ++i) - { - _pinfo *p = pids[i]; - if (p) - { - switch (which) - { - case PRIO_PROCESS: - if ((pid_t) who != p->pid) - continue; - break; - case PRIO_PGRP: - if ((pid_t) who != p->pgid) - continue; - break; - case PRIO_USER: - if ((__uid32_t) who != p->uid) - continue; - break; - } - HANDLE proc_h = OpenProcess (PROCESS_SET_INFORMATION, FALSE, - p->dwProcessId); - if (!proc_h) - error = EPERM; - else - { - if (!SetPriorityClass (proc_h, prio)) - error = EACCES; - else - p->nice = value; - CloseHandle (proc_h); - } - } - } - pids.reset (); - if (error) - { - set_errno (error); - return -1; - } - return 0; -} - -extern "C" int -getpriority (int which, id_t who) -{ - int nice = NZERO * 2; /* Illegal value */ - - switch (which) - { - case PRIO_PROCESS: - if (!who) - who = myself->pid; - if ((pid_t) who == myself->pid) - return myself->nice; - break; - case PRIO_PGRP: - if (!who) - who = myself->pgid; - break; - case PRIO_USER: - if (!who) - who = myself->uid; - break; - default: - set_errno (EINVAL); - return -1; - } - winpids pids ((DWORD) 0); - for (DWORD i = 0; i < pids.npids; ++i) - { - _pinfo *p = pids[i]; - if (p) - switch (which) - { - case PRIO_PROCESS: - if ((pid_t) who == p->pid) - { - nice = p->nice; - goto out; - } - break; - case PRIO_PGRP: - if ((pid_t) who == p->pgid && p->nice < nice) - nice = p->nice; - break; - case PRIO_USER: - if ((__uid32_t) who == p->uid && p->nice < nice) - nice = p->nice; - break; - } - } -out: - pids.reset (); - if (nice == NZERO * 2) - { - set_errno (ESRCH); - return -1; - } - return nice; -} - -extern "C" int -nice (int incr) -{ - return setpriority (PRIO_PROCESS, myself->pid, myself->nice + incr); -} - -/* - * Find the first bit set in I. - */ - -extern "C" int -ffs (int i) -{ - static const unsigned char table[] = - { - 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, - 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 - }; - unsigned long int a; - unsigned long int x = i & -i; - - a = x <= 0xffff ? (x <= 0xff ? 0 : 8) : (x <= 0xffffff ? 16 : 24); - - return table[x >> a] + a; -} - -static void -locked_append (int fd, const void * buf, size_t size) -{ - struct __flock64 lock_buffer = {F_WRLCK, SEEK_SET, 0, 0, 0}; - int count = 0; - - do - if ((lock_buffer.l_start = lseek64 (fd, 0, SEEK_END)) != (_off64_t) -1 - && fcntl64 (fd, F_SETLKW, &lock_buffer) != -1) - { - if (lseek64 (fd, 0, SEEK_END) != (_off64_t) -1) - write (fd, buf, size); - lock_buffer.l_type = F_UNLCK; - fcntl64 (fd, F_SETLK, &lock_buffer); - break; - } - while (count++ < 1000 - && (errno == EACCES || errno == EAGAIN) - && !usleep (1000)); -} - -extern "C" void -updwtmp (const char *wtmp_file, const struct utmp *ut) -{ - int fd; - - if ((fd = open (wtmp_file, O_WRONLY | O_BINARY, 0)) >= 0) - { - locked_append (fd, ut, sizeof *ut); - close (fd); - } -} - -static int utmp_fd = -1; -static bool utmp_readonly = false; -static char *utmp_file = (char *) _PATH_UTMP; - -static void -internal_setutent (bool force_readwrite) -{ - if (force_readwrite && utmp_readonly) - endutent (); - if (utmp_fd < 0) - { - utmp_fd = open (utmp_file, O_RDWR | O_BINARY); - /* If open fails, we assume an unprivileged process (who?). In this - case we try again for reading only unless the process calls - pututline() (==force_readwrite) in which case opening just fails. */ - if (utmp_fd < 0 && !force_readwrite) - { - utmp_fd = open (utmp_file, O_RDONLY | O_BINARY); - if (utmp_fd >= 0) - utmp_readonly = true; - } - } - else - lseek (utmp_fd, 0, SEEK_SET); -} - -extern "C" void -setutent () -{ - internal_setutent (false); -} - -extern "C" void -endutent () -{ - if (utmp_fd >= 0) - { - close (utmp_fd); - utmp_fd = -1; - utmp_readonly = false; - } -} - -extern "C" void -utmpname (const char *file) -{ - myfault efault; - if (efault.faulted () || !*file) - { - debug_printf ("Invalid file"); - return; - } - endutent (); - utmp_file = strdup (file); - debug_printf ("New UTMP file: %s", utmp_file); -} -EXPORT_ALIAS (utmpname, utmpxname) - -/* Note: do not make NO_COPY */ -static struct utmp utmp_data_buf[16]; -static unsigned utix = 0; -#define nutdbuf (sizeof (utmp_data_buf) / sizeof (utmp_data_buf[0])) -#define utmp_data ({ \ - if (utix > nutdbuf) \ - utix = 0; \ - utmp_data_buf + utix++; \ -}) - -static struct utmpx * -copy_ut_to_utx (struct utmp *ut, struct utmpx *utx) -{ - if (!ut) - return NULL; - memcpy (utx, ut, sizeof *ut); - utx->ut_tv.tv_sec = ut->ut_time; - utx->ut_tv.tv_usec = 0; - return utx; -} - -extern "C" struct utmp * -getutent () -{ - if (utmp_fd < 0) - { - internal_setutent (false); - if (utmp_fd < 0) - return NULL; - } - - utmp *ut = utmp_data; - if (read (utmp_fd, ut, sizeof *ut) != sizeof *ut) - return NULL; - return ut; -} - -extern "C" struct utmp * -getutid (const struct utmp *id) -{ - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - if (utmp_fd < 0) - { - internal_setutent (false); - if (utmp_fd < 0) - return NULL; - } - - utmp *ut = utmp_data; - while (read (utmp_fd, ut, sizeof *ut) == sizeof *ut) - { - switch (id->ut_type) - { - case RUN_LVL: - case BOOT_TIME: - case OLD_TIME: - case NEW_TIME: - if (id->ut_type == ut->ut_type) - return ut; - break; - case INIT_PROCESS: - case LOGIN_PROCESS: - case USER_PROCESS: - case DEAD_PROCESS: - if (strncmp (id->ut_id, ut->ut_id, UT_IDLEN) == 0) - return ut; - break; - default: - return NULL; - } - } - return NULL; -} - -extern "C" struct utmp * -getutline (const struct utmp *line) -{ - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - if (utmp_fd < 0) - { - internal_setutent (false); - if (utmp_fd < 0) - return NULL; - } - - utmp *ut = utmp_data; - while (read (utmp_fd, ut, sizeof *ut) == sizeof *ut) - if ((ut->ut_type == LOGIN_PROCESS || - ut->ut_type == USER_PROCESS) && - !strncmp (ut->ut_line, line->ut_line, sizeof (ut->ut_line))) - return ut; - - return NULL; -} - -extern "C" struct utmp * -pututline (const struct utmp *ut) -{ - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - internal_setutent (true); - if (utmp_fd < 0) - { - debug_printf ("error: utmp_fd %d", utmp_fd); - return NULL; - } - debug_printf ("ut->ut_type %d, ut->ut_pid %d, ut->ut_line '%s', ut->ut_id '%s'\n", - ut->ut_type, ut->ut_pid, ut->ut_line, ut->ut_id); - debug_printf ("ut->ut_user '%s', ut->ut_host '%s'\n", - ut->ut_user, ut->ut_host); - - struct utmp *u; - if ((u = getutid (ut))) - { - lseek (utmp_fd, -sizeof *ut, SEEK_CUR); - write (utmp_fd, ut, sizeof *ut); - } - else - locked_append (utmp_fd, ut, sizeof *ut); - /* The documentation says to return a pointer to this which implies that - this has to be cast from a const. That doesn't seem right but the - documentation seems pretty clear on this. */ - return (struct utmp *) ut; -} - -extern "C" void -setutxent () -{ - internal_setutent (false); -} - -extern "C" void -endutxent () -{ - endutent (); -} - -extern "C" struct utmpx * -getutxent () -{ - /* UGH. Not thread safe. */ - static struct utmpx utx; - return copy_ut_to_utx (getutent (), &utx); -} - -extern "C" struct utmpx * -getutxid (const struct utmpx *id) -{ - /* UGH. Not thread safe. */ - static struct utmpx utx; - - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - ((struct utmpx *)id)->ut_time = id->ut_tv.tv_sec; - return copy_ut_to_utx (getutid ((struct utmp *) id), &utx); -} - -extern "C" struct utmpx * -getutxline (const struct utmpx *line) -{ - /* UGH. Not thread safe. */ - static struct utmpx utx; - - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - ((struct utmpx *)line)->ut_time = line->ut_tv.tv_sec; - return copy_ut_to_utx (getutline ((struct utmp *) line), &utx); -} - -extern "C" struct utmpx * -pututxline (const struct utmpx *utmpx) -{ - /* UGH. Not thread safe. */ - static struct utmpx utx; - - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - ((struct utmpx *)utmpx)->ut_time = utmpx->ut_tv.tv_sec; - return copy_ut_to_utx (pututline ((struct utmp *) utmpx), &utx); -} - -extern "C" void -updwtmpx (const char *wtmpx_file, const struct utmpx *utmpx) -{ - ((struct utmpx *)utmpx)->ut_time = utmpx->ut_tv.tv_sec; - updwtmp (wtmpx_file, (const struct utmp *) utmpx); -} - -extern "C" -long gethostid (void) -{ - unsigned data[13] = {0x92895012, - 0x10293412, - 0x29602018, - 0x81928167, - 0x34601329, - 0x75630198, - 0x89860395, - 0x62897564, - 0x00194362, - 0x20548593, - 0x96839102, - 0x12219854, - 0x00290012}; - - bool has_cpuid = false; - - DWORD opmask = SetThreadAffinityMask (GetCurrentThread (), 1); - if (!opmask) - debug_printf ("SetThreadAffinityMask to 1 failed, %E"); - - if (!can_set_flag (0x00040000)) - debug_printf ("386 processor - no cpuid"); - else - { - debug_printf ("486 processor"); - if (can_set_flag (0x00200000)) - { - debug_printf ("processor supports CPUID instruction"); - has_cpuid = true; - } - else - debug_printf ("processor does not support CPUID instruction"); - } - if (has_cpuid) - { - unsigned maxf, unused[3]; - cpuid (&maxf, &unused[0], &unused[1], &unused[2], 0); - maxf &= 0xffff; - if (maxf >= 1) - { - unsigned features; - cpuid (&data[0], &unused[0], &unused[1], &features, 1); - if (features & (1 << 18)) - { - debug_printf ("processor has psn"); - if (maxf >= 3) - { - cpuid (&unused[0], &unused[1], &data[1], &data[2], 3); - debug_printf ("Processor PSN: %04x-%04x-%04x-%04x-%04x-%04x", - data[0] >> 16, data[0] & 0xffff, data[2] >> 16, data[2] & 0xffff, data[1] >> 16, data[1] & 0xffff); - } - } - else - debug_printf ("processor does not have psn"); - } - } - - UUID Uuid; - RPC_STATUS status = UuidCreateSequential (&Uuid); - if (GetLastError () == ERROR_PROC_NOT_FOUND) - status = UuidCreate (&Uuid); - if (status == RPC_S_OK) - { - data[4] = *(unsigned *)&Uuid.Data4[2]; - data[5] = *(unsigned short *)&Uuid.Data4[6]; - // Unfortunately Windows will sometimes pick a virtual Ethernet card - // e.g. VMWare Virtual Ethernet Adaptor - debug_printf ("MAC address of first Ethernet card: %02x:%02x:%02x:%02x:%02x:%02x", - Uuid.Data4[2], Uuid.Data4[3], Uuid.Data4[4], - Uuid.Data4[5], Uuid.Data4[6], Uuid.Data4[7]); - } - else - { - debug_printf ("no Ethernet card installed"); - } - - reg_key key (HKEY_LOCAL_MACHINE, KEY_READ, "SOFTWARE", "Microsoft", "Windows", "CurrentVersion", NULL); - key.get_string ("ProductId", (char *)&data[6], 24, "00000-000-0000000-00000"); - debug_printf ("Windows Product ID: %s", (char *)&data[6]); - - /* Contrary to MSDN, NT4 requires the second argument - or a STATUS_ACCESS_VIOLATION is generated */ - ULARGE_INTEGER availb; - GetDiskFreeSpaceEx ("C:\\", &availb, (PULARGE_INTEGER) &data[11], NULL); - - debug_printf ("hostid entropy: %08x %08x %08x %08x " - "%08x %08x %08x %08x " - "%08x %08x %08x %08x " - "%08x", - data[0], data[1], - data[2], data[3], - data[4], data[5], - data[6], data[7], - data[8], data[9], - data[10], data[11], - data[12]); - - long hostid = 0x40291372; - // a random hashing algorithm - // dependancy on md5 is probably too costly - for (int i=0;i<13;i++) - hostid ^= ((data[i] << (i << 2)) | (data[i] >> (32 - (i << 2)))); - - if (opmask && !SetThreadAffinityMask (GetCurrentThread (), opmask)) - debug_printf ("SetThreadAffinityMask to %p failed, %E", opmask); - - debug_printf ("hostid: %08x", hostid); - - return hostid; -} - -#define ETC_SHELLS "/etc/shells" -static int shell_index; -static struct __sFILE64 *shell_fp; - -extern "C" char * -getusershell () -{ - /* List of default shells if no /etc/shells exists, defined as on Linux. - FIXME: SunOS has a far longer list, containing all shells which - might be shipped with the OS. Should we do the same for the Cygwin - distro, adding bash, tcsh, ksh, pdksh and zsh? */ - static NO_COPY const char *def_shells[] = { - "/bin/sh", - "/bin/csh", - "/usr/bin/sh", - "/usr/bin/csh", - NULL - }; - static char buf[PATH_MAX]; - int ch, buf_idx; - - if (!shell_fp && !(shell_fp = fopen64 (ETC_SHELLS, "rt"))) - { - if (def_shells[shell_index]) - return strcpy (buf, def_shells[shell_index++]); - return NULL; - } - /* Skip white space characters. */ - while ((ch = getc (shell_fp)) != EOF && isspace (ch)) - ; - /* Get each non-whitespace character as part of the shell path as long as - it fits in buf. */ - for (buf_idx = 0; - ch != EOF && !isspace (ch) && buf_idx < PATH_MAX; - buf_idx++, ch = getc (shell_fp)) - buf[buf_idx] = ch; - /* Skip any trailing non-whitespace character not fitting in buf. If the - path is longer than PATH_MAX, it's invalid anyway. */ - while (ch != EOF && !isspace (ch)) - ch = getc (shell_fp); - if (buf_idx) - { - buf[buf_idx] = '\0'; - return buf; - } - return NULL; -} - -extern "C" void -setusershell () -{ - if (shell_fp) - fseek (shell_fp, 0L, SEEK_SET); - shell_index = 0; -} - -extern "C" void -endusershell () -{ - if (shell_fp) - { - fclose (shell_fp); - shell_fp = NULL; - } - shell_index = 0; -} - -extern "C" void -flockfile (FILE *file) -{ - _flockfile (file); -} - -extern "C" int -ftrylockfile (FILE *file) -{ - return _ftrylockfile (file); -} - -extern "C" void -funlockfile (FILE *file) -{ - _funlockfile (file); -} - -extern "C" FILE * -popen (const char *command, const char *in_type) -{ - const char *type = in_type; - char rw = *type++; - - if (*type == 'b' || *type == 't') - type++; - if ((rw != 'r' && rw != 'w') || (*type != '\0')) - { - set_errno (EINVAL); - return NULL; - } - - int fd, other_fd, __stdin, __stdout, stdwhat; - - int fds[2]; - if (pipe (fds) < 0) - return NULL; - - switch (rw) - { - case 'r': - __stdin = -1; - stdwhat = 1; - other_fd = __stdout = fds[1]; - fd = fds[0]; - break; - case 'w': - __stdout = -1; - stdwhat = 0; - other_fd = __stdin = fds[0]; - fd = fds[1]; - break; - default: - return NULL; /* avoid a compiler warning */ - } - - FILE *fp = fdopen (fd, in_type); - fcntl64 (fd, F_SETFD, fcntl64 (fd, F_GETFD, 0) | FD_CLOEXEC); - - if (!fp) - goto err; - - pid_t pid; - const char *argv[4]; - - argv[0] = "/bin/sh"; - argv[1] = "-c"; - argv[2] = command; - argv[3] = NULL; - - { - lock_process now; - int state = fcntl64 (stdwhat, F_GETFD, 0); - fcntl64 (stdwhat, F_SETFD, state | FD_CLOEXEC); - pid = spawn_guts ("/bin/sh", argv, cur_environ (), _P_NOWAIT, - __stdin, __stdout); - fcntl64 (stdwhat, F_SETFD, state); - } - - if (pid < 0) - goto err; - close (other_fd); - - fhandler_pipe *fh = (fhandler_pipe *) cygheap->fdtab[fd]; - fh->set_popen_pid (pid); - - return fp; - -err: - int save_errno = get_errno (); - close (fds[0]); - close (fds[1]); - set_errno (save_errno); - return NULL; -} - -int -pclose (FILE *fp) -{ - fhandler_pipe *fh = (fhandler_pipe *) cygheap->fdtab[fileno(fp)]; - - if (fh->get_device () != FH_PIPEW && fh->get_device () != FH_PIPER) - { - set_errno (EBADF); - return -1; - } - - int pid = fh->get_popen_pid (); - if (!pid) - { - set_errno (ECHILD); - return -1; - } - - if (fclose (fp)) - return -1; - - int status; - while (1) - if (waitpid (pid, &status, 0) == pid) - break; - else if (get_errno () == EINTR) - continue; - else - return -1; - - return status; -} - -/* Preliminary(?) implementation of the openat family of functions. */ - -static int -gen_full_path_at (char *path_ret, int dirfd, const char *pathname, - bool null_pathname_allowed = false) -{ - /* Set null_pathname_allowed to true to allow GLIBC compatible behaviour - for NULL pathname. Only used by futimesat. */ - if (!pathname && !null_pathname_allowed) - { - set_errno (EFAULT); - return -1; - } - if (pathname) - { - if (!*pathname) - { - set_errno (ENOENT); - return -1; - } - if (strlen (pathname) >= PATH_MAX) - { - set_errno (ENAMETOOLONG); - return -1; - } - } - if (pathname && isdirsep (*pathname)) - stpcpy (path_ret, pathname); - else - { - char *p; - - if (dirfd == AT_FDCWD) - p = stpcpy (path_ret, cygheap->cwd.posix); - else - { - cygheap_fdget cfd (dirfd); - if (cfd < 0) - return -1; - if (!cfd->pc.isdir ()) - { - set_errno (ENOTDIR); - return -1; - } - p = stpcpy (path_ret, cfd->get_name ()); - } - if (!p) - { - set_errno (ENOTDIR); - return -1; - } - if (pathname) - { - if (p[-1] != '/') - *p++ = '/'; - stpcpy (p, pathname); - } - } - return 0; -} - -extern "C" int -openat (int dirfd, const char *pathname, int flags, ...) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - - va_list ap; - mode_t mode; - - va_start (ap, flags); - mode = va_arg (ap, mode_t); - va_end (ap); - return open (path, flags, mode); -} - -extern "C" int -faccessat (int dirfd, const char *pathname, int mode, int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - int res = -1; - char *path = tp.c_get (); - if (!gen_full_path_at (path, dirfd, pathname)) - { - if (flags & ~(F_OK|R_OK|W_OK|X_OK)) - set_errno (EINVAL); - else - { - fhandler_base *fh = build_fh_name (path, NULL, - (flags & AT_SYMLINK_NOFOLLOW) - ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW, - stat_suffixes); - if (fh) - { - res = fh->fhaccess (mode); - delete fh; - } - } - } - debug_printf ("returning %d", res); - return res; -} - -extern "C" int -fchmodat (int dirfd, const char *pathname, mode_t mode, int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return chmod (path, mode); -} - -extern "C" int -fchownat (int dirfd, const char *pathname, __uid32_t uid, __gid32_t gid, - int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return chown_worker (path, (flags & AT_SYMLINK_NOFOLLOW) - ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW, uid, gid); -} - -extern "C" int -fstatat (int dirfd, const char *pathname, struct __stat64 *st, int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return (flags & AT_SYMLINK_NOFOLLOW) ? lstat64 (path, st) : stat64 (path, st); -} - -extern int utimens_worker (path_conv &, const struct timespec *); - -extern "C" int -utimensat (int dirfd, const char *pathname, const struct timespec *times, - int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - path_conv win32 (path, PC_POSIX | ((flags & AT_SYMLINK_NOFOLLOW) - ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW), - stat_suffixes); - return utimens_worker (win32, times); -} - -extern "C" int -futimesat (int dirfd, const char *pathname, const struct timeval *times) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname, true)) - return -1; - return utimes (path, times); -} - -extern "C" int -linkat (int olddirfd, const char *oldpathname, - int newdirfd, const char *newpathname, - int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *oldpath = tp.c_get (); - if (gen_full_path_at (oldpath, olddirfd, oldpathname)) - return -1; - char *newpath = tp.c_get (); - if (gen_full_path_at (newpath, newdirfd, newpathname)) - return -1; - if (flags & AT_SYMLINK_FOLLOW) - { - path_conv old_name (oldpath, PC_SYM_FOLLOW | PC_POSIX, stat_suffixes); - if (old_name.error) - { - set_errno (old_name.error); - return -1; - } - strcpy (oldpath, old_name.normalized_path); - } - return link (oldpath, newpath); -} - -extern "C" int -mkdirat (int dirfd, const char *pathname, mode_t mode) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return mkdir (path, mode); -} - -extern "C" int -mkfifoat (int dirfd, const char *pathname, mode_t mode) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return mkfifo (path, mode); -} - -extern "C" int -mknodat (int dirfd, const char *pathname, mode_t mode, __dev32_t dev) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return mknod32 (path, mode, dev); -} - -extern "C" ssize_t -readlinkat (int dirfd, const char *pathname, char *buf, size_t bufsize) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return readlink (path, buf, bufsize); -} - -extern "C" int -renameat (int olddirfd, const char *oldpathname, - int newdirfd, const char *newpathname) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *oldpath = tp.c_get (); - if (gen_full_path_at (oldpath, olddirfd, oldpathname)) - return -1; - char *newpath = tp.c_get (); - if (gen_full_path_at (newpath, newdirfd, newpathname)) - return -1; - return rename (oldpath, newpath); -} - -extern "C" int -symlinkat (const char *oldpath, int newdirfd, const char *newpathname) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *newpath = tp.c_get (); - if (gen_full_path_at (newpath, newdirfd, newpathname)) - return -1; - return symlink (oldpath, newpath); -} - -extern "C" int -unlinkat (int dirfd, const char *pathname, int flags) -{ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - char *path = tp.c_get (); - if (gen_full_path_at (path, dirfd, pathname)) - return -1; - return (flags & AT_REMOVEDIR) ? rmdir (path) : unlink (path); -} |