diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 2393 |
1 files changed, 0 insertions, 2393 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc deleted file mode 100644 index 3b2104d7f..000000000 --- a/winsup/cygwin/syscalls.cc +++ /dev/null @@ -1,2393 +0,0 @@ -/* syscalls.cc: syscalls - - Copyright 1996, 1997, 1998, 1999, 2000, 2001 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. */ - -#include "winsup.h" -#include <sys/stat.h> -#include <sys/vfs.h> /* needed for statfs */ -#include <fcntl.h> -#include <pwd.h> -#include <grp.h> -#include <stdlib.h> -#include <stdio.h> -#include <process.h> -#include <utmp.h> -#include <sys/uio.h> -#include <errno.h> -#include <limits.h> -#include <winnls.h> -#include <wininet.h> -#include <lmcons.h> /* for UNLEN */ -#include <cygwin/version.h> -#include <sys/cygwin.h> -#include "cygerrno.h" -#include "perprocess.h" -#include "security.h" -#include "fhandler.h" -#include "path.h" -#include "dtable.h" -#include "sync.h" -#include "sigproc.h" -#include "pinfo.h" -#include <unistd.h> -#include "shared_info.h" -#include "cygheap.h" - -extern int normalize_posix_path (const char *, char *); - -SYSTEM_INFO system_info; - -/* 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 (void) -{ - SetResourceLock (LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "close_all_files"); - - fhandler_base *fh; - for (int i = 0; i < (int) cygheap->fdtab.size; i++) - if ((fh = cygheap->fdtab[i]) != NULL) - { - fh->close (); - cygheap->fdtab.release (i); - } - - ReleaseResourceLock (LOCK_FD_LIST, WRITE_LOCK | READ_LOCK, "close_all_files"); - cygwin_shared->delqueue.process_queue (); -} - -BOOL __stdcall -check_pty_fds (void) -{ - int res = FALSE; - SetResourceLock (LOCK_FD_LIST, WRITE_LOCK, "check_pty_fds"); - fhandler_base *fh; - for (int i = 0; i < (int) cygheap->fdtab.size; i++) - if ((fh = cygheap->fdtab[i]) != NULL && - (fh->get_device () == FH_TTYS || fh->get_device () == FH_PTYM)) - { - res = TRUE; - break; - } - ReleaseResourceLock (LOCK_FD_LIST, WRITE_LOCK, "check_pty_fds"); - return res; -} - -int -dup (int fd) -{ - int res; - cygheap_fdnew newfd; - - if (newfd < 0) - res = -1; - else - res = dup2 (fd, newfd); - - return res; -} - -int -dup2 (int oldfd, int newfd) -{ - return cygheap->fdtab.dup2 (oldfd, newfd); -} - -extern "C" int -_unlink (const char *ourname) -{ - int res = -1; - sigframe thisframe (mainthread); - - path_conv win32_name (ourname, PC_SYM_NOFOLLOW | PC_FULL); - - if (win32_name.error) - { - set_errno (win32_name.error); - goto done; - } - - syscall_printf ("_unlink (%s)", win32_name.get_win32 ()); - - 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; - } - - /* Windows won't check the directory mode, so we do that ourselves. */ - if (!writable_directory (win32_name)) - { - syscall_printf ("non-writable directory"); - goto done; - } - - /* Check for shortcut as symlink condition. */ - if (win32_name.has_attribute (FILE_ATTRIBUTE_READONLY)) - { - int len = strlen (win32_name); - if (len > 4 && strcasematch ((char *) win32_name + len - 4, ".lnk")) - SetFileAttributes (win32_name, (DWORD) win32_name & ~FILE_ATTRIBUTE_READONLY); - } - - DWORD lasterr; - lasterr = 0; - for (int i = 0; i < 2; i++) - { - if (DeleteFile (win32_name)) - { - syscall_printf ("DeleteFile succeeded"); - goto ok; - } - - lasterr = GetLastError (); - if (i || lasterr != ERROR_ACCESS_DENIED || win32_name.issymlink ()) - break; /* Couldn't delete it. */ - - /* if access denied, chmod to be writable, in case it is not, - and try again */ - (void) chmod (win32_name, 0777); - } - - /* Windows 9x seems to report ERROR_ACCESS_DENIED rather than sharing - violation. So, set lasterr to ERROR_SHARING_VIOLATION in this case - to simplify tests. */ - if (wincap.access_denied_on_delete () && lasterr == ERROR_ACCESS_DENIED - && !win32_name.isremote ()) - lasterr = ERROR_SHARING_VIOLATION; - - /* Tried to delete file by normal DeleteFile and by resetting protection - and then deleting. That didn't work. - - There are two possible reasons for this: 1) The file may be opened and - Windows is not allowing it to be deleted, or 2) We may not have permissions - to delete the file. - - So, first assume that it may be 1) and try to remove the file using the - Windows FILE_FLAG_DELETE_ON_CLOSE semantics. This seems to work only - spottily on Windows 9x/Me but it does seem to work reliably on NT as - long as the file doesn't exist on a remote drive. */ - - bool delete_on_close_ok; - - delete_on_close_ok = !win32_name.isremote () - && wincap.has_delete_on_close (); - - /* Attempt to use "delete on close" semantics to handle removing - a file which may be open. */ - HANDLE h; - h = CreateFile (win32_name, GENERIC_READ, FILE_SHARE_READ, &sec_none_nih, - OPEN_EXISTING, FILE_FLAG_DELETE_ON_CLOSE, 0); - if (h == INVALID_HANDLE_VALUE) - { - if (GetLastError () == ERROR_FILE_NOT_FOUND) - goto ok; - } - else - { - CloseHandle (h); - syscall_printf ("CreateFile/CloseHandle succeeded"); - /* Everything is fine if the file has disappeared or if we know that the - FILE_FLAG_DELETE_ON_CLOSE will eventually work. */ - if (GetFileAttributes (win32_name) == (DWORD) -1 || delete_on_close_ok) - goto ok; /* The file is either gone already or will eventually be - deleted by the OS. */ - } - - /* FILE_FLAGS_DELETE_ON_CLOSE was a bust. If this is a sharing - violation, then queue the file for deletion when the process - exits. Otherwise, punt. */ - if (lasterr != ERROR_SHARING_VIOLATION) - goto err; - - syscall_printf ("couldn't delete file, err %d", lasterr); - - /* Add file to the "to be deleted" queue. */ - cygwin_shared->delqueue.queue_file (win32_name); - - /* Success condition. */ - ok: - res = 0; - goto done; - - /* Error condition. */ - err: - __seterrno (); - res = -1; - - done: - syscall_printf ("%d = unlink (%s)", res, ourname); - return res; -} - -extern "C" int -remove (const char *ourname) -{ - path_conv win32_name (ourname, PC_SYM_NOFOLLOW | PC_FULL); - - 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; -} - -/* 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) -{ - if (myself->pgid != _getpid ()) - { - if (myself->ctty == TTY_CONSOLE && - !cygheap->fdtab.has_console_fds () && - !check_pty_fds ()) - FreeConsole (); - myself->ctty = -1; - myself->sid = _getpid (); - myself->pgid = _getpid (); - syscall_printf ("sid %d, pgid %d, ctty %d", myself->sid, myself->pgid, myself->ctty); - return myself->sid; - } - set_errno (EPERM); - return -1; -} - -extern "C" ssize_t -_read (int fd, void *ptr, size_t len) -{ - if (len == 0) - return 0; - - if (__check_null_invalid_struct_errno (ptr, len)) - return -1; - - int res; - extern int sigcatchers; - int e = get_errno (); - - while (1) - { - sigframe thisframe (mainthread); - - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - - DWORD wait = cfd->is_nonblocking () ? 0 : INFINITE; - - /* Could block, so let user know we at least got here. */ - syscall_printf ("read (%d, %p, %d) %sblocking, sigcatchers %d", fd, ptr, len, wait ? "" : "non", sigcatchers); - - if (wait && (!cfd->is_slow () || cfd->get_r_no_interrupt ())) - debug_printf ("non-interruptible read\n"); - 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()) - return -1; - - /* 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()) - return -1; - - if (res > bg_eof) - { - myself->process_state |= PID_TTYIN; - if (!cfd.isopen()) - return -1; - res = cfd->read (ptr, len); - myself->process_state &= ~PID_TTYIN; - } - - out: - if (res >= 0 || get_errno () != EINTR || !thisframe.call_signal_handler ()) - break; - set_errno (e); - } - - syscall_printf ("%d = read (%d, %p, %d), errno %d", res, fd, ptr, len, - get_errno ()); - MALLOC_CHECK; - return res; -} - -extern "C" ssize_t -_write (int fd, const void *ptr, size_t len) -{ - if (__check_invalid_read_ptr_errno (ptr, len)) - return -1; - - int res = -1; - - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - goto done; - - /* Could block, so let user know we at least got here. */ - if (fd == 1 || fd == 2) - paranoid_printf ("write (%d, %p, %d)", fd, ptr, len); - else - syscall_printf ("write (%d, %p, %d)", fd, ptr, len); - - res = cfd->bg_check (SIGTTOU); - - if (res > bg_eof) - { - myself->process_state |= PID_TTYOU; - res = cfd->write (ptr, len); - myself->process_state &= ~PID_TTYOU; - } - -done: - if (fd == 1 || fd == 2) - paranoid_printf ("%d = write (%d, %p, %d)", res, fd, ptr, len); - else - syscall_printf ("%d = write (%d, %p, %d)", res, fd, ptr, len); - - return (ssize_t) res; -} - -/* - * FIXME - should really move this interface into fhandler, and implement - * write in terms of it. There are devices in Win32 that could do this with - * overlapped I/O much more efficiently - we should eventually use - * these. - */ - -extern "C" ssize_t -writev (int fd, const struct iovec *iov, int iovcnt) -{ - int i; - ssize_t len, total; - char *base; - - if (iovcnt < 1 || iovcnt > IOV_MAX) - { - set_errno (EINVAL); - return -1; - } - - /* Ensure that the sum of the iov_len values is less than - SSIZE_MAX (per spec), if so, we must fail with no output (per spec). - */ - total = 0; - for (i = 0; i < iovcnt; ++i) - { - total += iov[i].iov_len; - if (total > SSIZE_MAX) - { - set_errno (EINVAL); - return -1; - } - } - /* Now write the data */ - for (i = 0, total = 0; i < iovcnt; i++, iov++) - { - len = iov->iov_len; - base = iov->iov_base; - while (len > 0) - { - register int nbytes; - nbytes = write (fd, base, len); - if (nbytes < 0 && total == 0) - return -1; - if (nbytes <= 0) - return total; - len -= nbytes; - total += nbytes; - base += nbytes; - } - } - return total; -} - -/* - * FIXME - should really move this interface into fhandler, and implement - * read in terms of it. There are devices in Win32 that could do this with - * overlapped I/O much more efficiently - we should eventually use - * these. - */ - -extern "C" ssize_t -readv (int fd, const struct iovec *iov, int iovcnt) -{ - int i; - ssize_t len, total; - char *base; - - for (i = 0, total = 0; i < iovcnt; i++, iov++) - { - len = iov->iov_len; - base = iov->iov_base; - while (len > 0) - { - register int nbytes; - nbytes = read (fd, base, len); - if (nbytes < 0 && total == 0) - return -1; - if (nbytes <= 0) - return total; - len -= nbytes; - total += nbytes; - base += nbytes; - } - } - return total; -} - -/* _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; - sigframe thisframe (mainthread); - - syscall_printf ("open (%s, %p)", unix_path, flags); - if (!check_null_empty_str_errno (unix_path)) - { - /* 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) - { - path_conv pc; - if (!(fh = cygheap->fdtab.build_fhandler_from_name (fd, unix_path, - NULL, pc))) - res = -1; // errno already set - else if (!fh->open (&pc, flags, (mode & 07777) & ~cygheap->umask)) - { - fd.release (); - res = -1; - } - else if ((res = fd) <= 2) - set_std_handle (res); - } - } - - syscall_printf ("%d = open (%s, %p)", res, unix_path, flags); - return res; -} - -extern "C" off_t -_lseek (int fd, off_t pos, int dir) -{ - off_t res; - sigframe thisframe (mainthread); - - 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; -} - -extern "C" int -_close (int fd) -{ - int res; - sigframe thisframe (mainthread); - - syscall_printf ("close (%d)", fd); - - MALLOC_CHECK; - cygheap_fdget cfd (fd, true); - if (cfd < 0) - res = -1; - else - { - cfd->close (); - cfd.release (); - res = 0; - } - - syscall_printf ("%d = close (%d)", res, fd); - MALLOC_CHECK; - return res; -} - -extern "C" int -isatty (int fd) -{ - int res; - sigframe thisframe (mainthread); - - cygheap_fdget cfd (fd); - if (cfd < 0) - res = 0; - else - res = cfd->is_tty (); - syscall_printf ("%d = isatty (%d)", res, fd); - return res; -} - -/* 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 *a, const char *b) -{ - int res = -1; - sigframe thisframe (mainthread); - path_conv real_a (a, PC_SYM_NOFOLLOW | PC_FULL); - path_conv real_b (b, PC_SYM_NOFOLLOW | PC_FULL); - - if (real_a.error) - { - set_errno (real_a.error); - goto done; - } - if (real_b.error) - { - set_errno (real_b.case_clash ? ECASECLASH : real_b.error); - goto done; - } - - if (real_b.exists ()) - { - syscall_printf ("file '%s' exists?", (char *)real_b); - set_errno (EEXIST); - goto done; - } - if (real_b.get_win32 ()[strlen (real_b.get_win32 ()) - 1] == '.') - { - syscall_printf ("trailing dot, bailing out"); - set_errno (EINVAL); - goto done; - } - - /* Try to make hard link first on Windows NT */ - if (wincap.has_hard_links ()) - { - if (CreateHardLinkA (real_b.get_win32 (), real_a.get_win32 (), NULL)) - { - res = 0; - goto done; - } - - HANDLE hFileSource; - - WIN32_STREAM_ID StreamId; - DWORD dwBytesWritten; - LPVOID lpContext; - DWORD cbPathLen; - DWORD StreamSize; - WCHAR wbuf[MAX_PATH]; - - BOOL bSuccess; - - hFileSource = CreateFile ( - real_a.get_win32 (), - FILE_WRITE_ATTRIBUTES, - FILE_SHARE_READ | FILE_SHARE_WRITE /*| FILE_SHARE_DELETE*/, - &sec_none_nih, // sa - OPEN_EXISTING, - 0, - NULL - ); - - if (hFileSource == INVALID_HANDLE_VALUE) - { - syscall_printf ("cannot open source, %E"); - goto docopy; - } - - lpContext = NULL; - cbPathLen = sys_mbstowcs (wbuf, real_b.get_win32 (), MAX_PATH) * sizeof (WCHAR); - - StreamId.dwStreamId = BACKUP_LINK; - StreamId.dwStreamAttributes = 0; - StreamId.dwStreamNameSize = 0; - StreamId.Size.HighPart = 0; - StreamId.Size.LowPart = cbPathLen; - - StreamSize = sizeof (WIN32_STREAM_ID) - sizeof (WCHAR**) + - StreamId.dwStreamNameSize; - - /* Write the WIN32_STREAM_ID */ - bSuccess = BackupWrite ( - hFileSource, - (LPBYTE) &StreamId, // buffer to write - StreamSize, // number of bytes to write - &dwBytesWritten, - FALSE, // don't abort yet - FALSE, // don't process security - &lpContext); - - if (bSuccess) - { - /* write the buffer containing the path */ - /* FIXME: BackupWrite sometimes traps if linkname is invalid. - Need to handle. */ - bSuccess = BackupWrite ( - hFileSource, - (LPBYTE) wbuf, // buffer to write - cbPathLen, // number of bytes to write - &dwBytesWritten, - FALSE, // don't abort yet - FALSE, // don't process security - &lpContext - ); - - if (!bSuccess) - syscall_printf ("cannot write linkname, %E"); - - /* Free context */ - BackupWrite ( - hFileSource, - NULL, // buffer to write - 0, // number of bytes to write - &dwBytesWritten, - TRUE, // abort - FALSE, // don't process security - &lpContext); - } - else - syscall_printf ("cannot write streamId, %E"); - - CloseHandle (hFileSource); - - if (!bSuccess) - goto docopy; - - res = 0; - goto done; - } -docopy: - /* do this with a copy */ - if (CopyFileA (real_a.get_win32 (), real_b.get_win32 (), 1)) - res = 0; - else - __seterrno (); - -done: - syscall_printf ("%d = link (%s, %s)", res, a, b); - 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, uid_t uid, gid_t gid) -{ - int res; - uid_t old_uid; - gid_t old_gid; - - if (check_null_empty_str_errno (name)) - return -1; - - if (!wincap.has_security ()) // real chown only works on NT - res = 0; // return zero (and do nothing) under Windows 9x - else - { - /* we need Win32 path names because of usage of Win32 API functions */ - path_conv win32_path (PC_NONULLEMPTY, name, fmode); - - if (win32_path.error) - { - set_errno (win32_path.error); - res = -1; - goto done; - } - - /* FIXME: This makes chown on a device succeed always. Someday we'll want - to actually allow chown to work properly on devices. */ - if (win32_path.is_device ()) - { - res = 0; - goto done; - } - - DWORD attrib = 0; - if (win32_path.isdir ()) - attrib |= S_IFDIR; - res = get_file_attribute (win32_path.has_acls (), - win32_path.get_win32 (), - (int *) &attrib, - &old_uid, - &old_gid); - if (!res) - { - if (uid == (uid_t) -1) - uid = old_uid; - if (gid == (gid_t) -1) - gid = old_gid; - if (win32_path.isdir()) - attrib |= S_IFDIR; - res = set_file_attribute (win32_path.has_acls (), win32_path, uid, - gid, attrib, cygheap->user.logsrv ()); - } - if (res != 0 && (!win32_path.has_acls () || !allow_ntsec)) - { - /* fake - if not supported, pretend we're like win95 - where it just works */ - res = 0; - } - } - -done: - syscall_printf ("%d = %schown (%s,...)", - res, (fmode & PC_SYM_NOFOLLOW) ? "l" : "", name); - return res; -} - -extern "C" int -chown (const char * name, uid_t uid, gid_t gid) -{ - sigframe thisframe (mainthread); - return chown_worker (name, PC_SYM_FOLLOW, uid, gid); -} - -extern "C" int -lchown (const char * name, uid_t uid, gid_t gid) -{ - sigframe thisframe (mainthread); - return chown_worker (name, PC_SYM_NOFOLLOW, uid, gid); -} - -extern "C" int -fchown (int fd, uid_t uid, gid_t gid) -{ - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fchown (%d,...)", fd); - return -1; - } - - const char *path = cfd->get_name (); - - if (path == NULL) - { - syscall_printf ("-1 = fchown (%d,...) (no name)", fd); - set_errno (ENOSYS); - return -1; - } - - syscall_printf ("fchown (%d,...): calling chown_worker (%s,FOLLOW,...)", - fd, path); - return chown_worker (path, PC_SYM_FOLLOW, uid, 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; -} - -/* chmod: POSIX 5.6.4.1 */ -extern "C" int -chmod (const char *path, mode_t mode) -{ - int res = -1; - sigframe thisframe (mainthread); - - path_conv win32_path (path); - - if (win32_path.error) - { - set_errno (win32_path.error); - goto done; - } - - /* FIXME: This makes chmod on a device succeed always. Someday we'll want - to actually allow chmod to work properly on devices. */ - if (win32_path.is_device ()) - { - res = 0; - goto done; - } - - if (!win32_path.exists ()) - __seterrno (); - else - { - /* temporary erase read only bit, to be able to set file security */ - SetFileAttributes (win32_path, (DWORD) win32_path & ~FILE_ATTRIBUTE_READONLY); - - uid_t uid; - gid_t gid; - - if (win32_path.isdir ()) - mode |= S_IFDIR; - get_file_attribute (win32_path.has_acls (), - win32_path.get_win32 (), - NULL, &uid, &gid); - /* FIXME: Do we really need this to be specified twice? */ - if (win32_path.isdir ()) - mode |= S_IFDIR; - if (!set_file_attribute (win32_path.has_acls (), win32_path, uid, gid, - mode, cygheap->user.logsrv ()) - && allow_ntsec) - res = 0; - - /* if the mode we want has any write bits set, we can't - be read only. */ - if (mode & (S_IWUSR | S_IWGRP | S_IWOTH)) - (DWORD) win32_path &= ~FILE_ATTRIBUTE_READONLY; - else - (DWORD) win32_path |= FILE_ATTRIBUTE_READONLY; - - if (S_ISLNK (mode) || S_ISSOCK (mode)) - (DWORD) win32_path |= FILE_ATTRIBUTE_SYSTEM; - - if (!SetFileAttributes (win32_path, win32_path)) - __seterrno (); - else - { - /* Correct NTFS security attributes have higher priority */ - if (res == 0 || !allow_ntsec) - res = 0; - } - } - -done: - 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) -{ - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fchmod (%d, 0%o)", fd, mode); - return -1; - } - - const char *path = cfd->get_name (); - - if (path == NULL) - { - syscall_printf ("-1 = fchmod (%d, 0%o) (no name)", fd, mode); - set_errno (ENOSYS); - return -1; - } - - syscall_printf ("fchmod (%d, 0%o): calling chmod (%s, 0%o)", - fd, mode, path, mode); - return chmod (path, mode); -} - -extern "C" int -_fstat (int fd, struct stat *buf) -{ - int res; - sigframe thisframe (mainthread); - - cygheap_fdget cfd (fd); - if (cfd < 0) - res = -1; - else - { - memset (buf, 0, sizeof (struct stat)); - res = cfd->fstat (buf, NULL); - } - - syscall_printf ("%d = fstat (%d, %p)", res, fd, buf); - return res; -} - -/* fsync: P96 6.6.1.1 */ -extern "C" int -fsync (int fd) -{ - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - { - syscall_printf ("-1 = fsync (%d)", fd); - return -1; - } - - if (FlushFileBuffers (cfd->get_handle ()) == 0) - { - __seterrno (); - return -1; - } - return 0; -} - -/* sync: standards? */ -extern "C" int -sync () -{ - return 0; -} - -suffix_info stat_suffixes[] = -{ - suffix_info ("", 1), - suffix_info (".exe", 1), - suffix_info (NULL) -}; - -/* Cygwin internal */ -int __stdcall -stat_worker (const char *name, struct stat *buf, int nofollow, path_conv *pc) -{ - int res = -1; - path_conv real_path; - fhandler_base *fh = NULL; - - if (!pc) - pc = &real_path; - - MALLOC_CHECK; - if (check_null_invalid_struct_errno (buf)) - goto done; - - fh = cygheap->fdtab.build_fhandler_from_name (-1, name, NULL, *pc, - (nofollow ? - PC_SYM_NOFOLLOW - : PC_SYM_FOLLOW) - | PC_FULL, stat_suffixes); - if (pc->error) - { - debug_printf ("got %d error from build_fhandler_from_name", pc->error); - set_errno (pc->error); - } - else - { - debug_printf ("(%s, %p, %d, %p), file_attributes %d", name, buf, nofollow, - pc, (DWORD) real_path); - memset (buf, 0, sizeof (struct stat)); - res = fh->fstat (buf, pc); - } - - done: - if (fh) - delete fh; - MALLOC_CHECK; - syscall_printf ("%d = (%s, %p)", res, name, buf); - return res; -} - -extern "C" int -_stat (const char *name, struct stat *buf) -{ - sigframe thisframe (mainthread); - syscall_printf ("entering"); - return stat_worker (name, buf, 0); -} - -/* lstat: Provided by SVR4 and 4.3+BSD, POSIX? */ -extern "C" int -lstat (const char *name, struct stat *buf) -{ - sigframe thisframe (mainthread); - syscall_printf ("entering"); - return stat_worker (name, buf, 1); -} - -extern int acl_access (const char *, int); - -extern "C" int -access (const char *fn, int flags) -{ - sigframe thisframe (mainthread); - // flags were incorrectly specified - if (flags & ~(F_OK|R_OK|W_OK|X_OK)) - { - set_errno (EINVAL); - return -1; - } - - if (allow_ntsec) - return acl_access (fn, flags); - - struct stat st; - int r = stat_worker (fn, &st, 0); - if (r) - return -1; - r = -1; - if (flags & R_OK) - { - if (st.st_uid == myself->uid) - { - if (! (st.st_mode & S_IRUSR)) - goto done; - } - else if (st.st_gid == myself->gid) - { - if (! (st.st_mode & S_IRGRP)) - goto done; - } - else if (! (st.st_mode & S_IROTH)) - goto done; - } - if (flags & W_OK) - { - if (st.st_uid == myself->uid) - { - if (! (st.st_mode & S_IWUSR)) - goto done; - } - else if (st.st_gid == myself->gid) - { - if (! (st.st_mode & S_IWGRP)) - goto done; - } - else if (! (st.st_mode & S_IWOTH)) - goto done; - } - if (flags & X_OK) - { - if (st.st_uid == myself->uid) - { - if (! (st.st_mode & S_IXUSR)) - goto done; - } - else if (st.st_gid == myself->gid) - { - if (! (st.st_mode & S_IXGRP)) - goto done; - } - else if (! (st.st_mode & S_IXOTH)) - goto done; - } - r = 0; -done: - if (r) - set_errno (EACCES); - return r; -} - -extern "C" int -_rename (const char *oldpath, const char *newpath) -{ - sigframe thisframe (mainthread); - int res = 0; - char *lnk_suffix = NULL; - - path_conv real_old (oldpath, PC_SYM_NOFOLLOW); - - if (real_old.error) - { - syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath); - set_errno (real_old.error); - return -1; - } - - path_conv real_new (newpath, PC_SYM_NOFOLLOW); - - /* Shortcut hack. */ - char new_lnk_buf[MAX_PATH + 5]; - if (real_old.issymlink () && !real_new.error && !real_new.case_clash) - { - int len_old = strlen (real_old.get_win32 ()); - if (strcasematch (real_old.get_win32 () + len_old - 4, ".lnk")) - { - strcpy (new_lnk_buf, newpath); - strcat (new_lnk_buf, ".lnk"); - newpath = new_lnk_buf; - real_new.check (newpath, PC_SYM_NOFOLLOW); - } - } - - if (real_new.error || real_new.case_clash) - { - syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath); - set_errno (real_new.case_clash ? ECASECLASH : real_new.error); - return -1; - } - - if (!writable_directory (real_old) || !writable_directory (real_new)) - { - syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath); - set_errno (EACCES); - return -1; - } - - if (!real_old.exists ()) /* file to move doesn't exist */ - { - syscall_printf ("file to move doesn't exist"); - set_errno (ENOENT); - return (-1); - } - - /* Destination file exists and is read only, change that or else - the rename won't work. */ - if (real_new.has_attribute (FILE_ATTRIBUTE_READONLY)) - SetFileAttributes (real_new, (DWORD) real_new & ~FILE_ATTRIBUTE_READONLY); - - /* Shortcut hack No. 2, part 1 */ - if (!real_old.issymlink () && !real_new.error && real_new.issymlink () && - real_new.known_suffix && strcasematch (real_new.known_suffix, ".lnk") && - (lnk_suffix = strrchr (real_new.get_win32 (), '.'))) - *lnk_suffix = '\0'; - - if (!MoveFile (real_old, real_new)) - res = -1; - - if (res == 0 || (GetLastError () != ERROR_ALREADY_EXISTS - && GetLastError () != ERROR_FILE_EXISTS)) - goto done; - - if (wincap.has_move_file_ex ()) - { - if (MoveFileEx (real_old.get_win32 (), real_new.get_win32 (), - MOVEFILE_REPLACE_EXISTING)) - res = 0; - } - else - { - syscall_printf ("try win95 hack"); - for (int i = 0; i < 2; i++) - { - if (!DeleteFileA (real_new.get_win32 ()) && - GetLastError () != ERROR_FILE_NOT_FOUND) - { - syscall_printf ("deleting %s to be paranoid", - real_new.get_win32 ()); - break; - } - else if (MoveFile (real_old.get_win32 (), real_new.get_win32 ())) - { - res = 0; - break; - } - } - } - -done: - if (res) - { - __seterrno (); - /* Reset R/O attributes if neccessary. */ - if (real_new.has_attribute (FILE_ATTRIBUTE_READONLY)) - SetFileAttributes (real_new, real_new); - } - else - { - /* make the new file have the permissions of the old one */ - SetFileAttributes (real_new, real_old); - - /* Shortcut hack, No. 2, part 2 */ - /* if the new filename was an existing shortcut, remove it now if the - new filename is equal to the shortcut name without .lnk suffix. */ - if (lnk_suffix) - { - *lnk_suffix = '.'; - DeleteFile (real_new); - } - } - - syscall_printf ("%d = rename (%s, %s)", res, (char *) real_old, - (char *) real_new); - - return res; -} - -extern "C" int -system (const char *cmdstring) -{ - if (check_null_empty_str_errno (cmdstring)) - return -1; - - sigframe thisframe (mainthread); - int res; - const char* command[4]; - _sig_func_ptr oldint, oldquit; - sigset_t child_block, old_mask; - - if (cmdstring == (const char *) NULL) - return 1; - - oldint = signal (SIGINT, SIG_IGN); - oldquit = signal (SIGQUIT, SIG_IGN); - sigemptyset (&child_block); - sigaddset (&child_block, SIGCHLD); - (void) sigprocmask (SIG_BLOCK, &child_block, &old_mask); - - command[0] = "sh"; - command[1] = "-c"; - command[2] = cmdstring; - command[3] = (const char *) NULL; - - if ((res = spawnvp (_P_WAIT, "sh", command)) == -1) - { - // when exec fails, return value should be as if shell - // executed exit (127) - res = 127; - } - - signal (SIGINT, oldint); - signal (SIGQUIT, oldquit); - (void) sigprocmask (SIG_SETMASK, &old_mask, 0); - 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.dwPageSize) - GetSystemInfo (&system_info); - return (int) system_info.dwPageSize; -} - -static int -check_posix_perm (const char *fname, int v) -{ - extern int allow_ntea, allow_ntsec, allow_smbntsec; - - /* Windows 95/98/ME don't support file system security at all. */ - if (!wincap.has_security ()) - return 0; - - /* ntea is ok for supporting permission bits but it doesn't support - full POSIX security settings. */ - if (v == _PC_POSIX_PERMISSIONS && allow_ntea) - return 1; - - if (!allow_ntsec) - return 0; - - char *root = rootdir (strcpy ((char *)alloca (strlen (fname)), fname)); - - if (!allow_smbntsec - && ((root[0] == '\\' && root[1] == '\\') - || GetDriveType (root) == DRIVE_REMOTE)) - return 0; - - DWORD vsn, len, flags; - if (!GetVolumeInformation (root, NULL, 0, &vsn, &len, &flags, NULL, 16)) - { - __seterrno (); - return 0; - } - - return (flags & FS_PERSISTENT_ACLS) ? 1 : 0; -} - -/* FIXME: not all values are correct... */ -extern "C" long int -fpathconf (int fd, int v) -{ - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - switch (v) - { - case _PC_LINK_MAX: - return _POSIX_LINK_MAX; - case _PC_MAX_CANON: - case _PC_MAX_INPUT: - if (isatty (fd)) - return _POSIX_MAX_CANON; - else - { - set_errno (EBADF); - return -1; - } - case _PC_NAME_MAX: - case _PC_PATH_MAX: - return PATH_MAX; - case _PC_PIPE_BUF: - return PIPE_BUF; - case _PC_CHOWN_RESTRICTED: - case _PC_NO_TRUNC: - return -1; - case _PC_VDISABLE: - if (cfd->is_tty ()) - return -1; - else - { - set_errno (EBADF); - return -1; - } - case _PC_POSIX_PERMISSIONS: - case _PC_POSIX_SECURITY: - if (cfd->get_device () == FH_DISK) - return check_posix_perm (cfd->get_win32_name (), v); - set_errno (EINVAL); - return -1; - default: - set_errno (EINVAL); - return -1; - } -} - -extern "C" long int -pathconf (const char *file, int v) -{ - switch (v) - { - case _PC_PATH_MAX: - return PATH_MAX - strlen (file); - case _PC_NAME_MAX: - return PATH_MAX; - case _PC_LINK_MAX: - return _POSIX_LINK_MAX; - case _PC_MAX_CANON: - case _PC_MAX_INPUT: - return _POSIX_MAX_CANON; - case _PC_PIPE_BUF: - return PIPE_BUF; - case _PC_CHOWN_RESTRICTED: - case _PC_NO_TRUNC: - return -1; - case _PC_VDISABLE: - return -1; - case _PC_POSIX_PERMISSIONS: - case _PC_POSIX_SECURITY: - { - path_conv full_path (file, PC_SYM_FOLLOW | PC_FULL); - if (full_path.error) - { - set_errno (full_path.error); - return -1; - } - if (full_path.is_device ()) - { - set_errno (EINVAL); - return -1; - } - return check_posix_perm (full_path, v); - } - default: - set_errno (EINVAL); - return -1; - } -} - -extern "C" char * -ttyname (int fd) -{ - cygheap_fdget cfd (fd); - if (cfd < 0 || !cfd->is_tty ()) - { - return 0; - } - return (char *) (cfd->ttyname ()); -} - -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) -{ - syscall_printf ("_cygwin_istext_for_stdio (%d)\n", fd); - if (CYGWIN_VERSION_OLD_STDIO_CRLF_HANDLING) - { - syscall_printf (" _cifs: old API\n"); - return 0; /* we do it for old apps, due to getc/putc macros */ - } - - cygheap_fdget cfd (fd, false, false); - if (cfd < 0) - { - syscall_printf (" _cifs: fd not open\n"); - return 0; - } - - if (cfd->get_device () != FH_DISK) - { - syscall_printf (" _cifs: fd not disk file\n"); - return 0; - } - - if (cfd->get_w_binary () || cfd->get_r_binary ()) - { - syscall_printf (" _cifs: get_*_binary\n"); - return 0; - } - - syscall_printf ("_cygwin_istext_for_stdio says yes\n"); - return 1; -} - -/* internal newlib function */ -extern "C" int _fwalk (struct _reent *ptr, int (*function) (FILE *)); - -static int setmode_mode; -static int setmode_file; - -static int -setmode_helper (FILE *f) -{ - if (fileno (f) != setmode_file) - return 0; - syscall_printf ("setmode: file was %s now %s\n", - f->_flags & __SCLE ? "cle" : "raw", - setmode_mode & O_TEXT ? "cle" : "raw"); - if (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->get_w_binary () && cfd->get_r_binary ()) - res = O_BINARY; - else if (cfd->get_w_binset () && cfd->get_r_binset ()) - res = O_TEXT; /* Specifically set O_TEXT */ - else - res = 0; - - if (!mode) - cfd->reset_to_open_binmode (); - else if (mode & O_BINARY) - { - cfd->set_w_binary (1); - cfd->set_r_binary (1); - } - else - { - cfd->set_w_binary (0); - cfd->set_r_binary (0); - } - - if (_cygwin_istext_for_stdio (fd)) - setmode_mode = O_TEXT; - else - setmode_mode = O_BINARY; - setmode_file = fd; - _fwalk (_REENT, setmode_helper); - - syscall_printf ("setmode (%d<%s>, %s) returns %s\n", fd, cfd->get_name (), - mode & O_TEXT ? "text" : "binary", - res & O_TEXT ? "text" : "binary"); - return res; -} - -/* ftruncate: P96 5.6.7.1 */ -extern "C" int -ftruncate (int fd, off_t length) -{ - sigframe thisframe (mainthread); - int res = -1; - - if (length < 0) - set_errno (EINVAL); - else - { - cygheap_fdget cfd (fd); - if (cfd >= 0) - { - HANDLE h = cygheap->fdtab[fd]->get_handle (); - - if (cfd->get_handle ()) - { - /* remember curr file pointer location */ - off_t prev_loc = cfd->lseek (0, SEEK_CUR); - - cfd->lseek (length, SEEK_SET); - if (!SetEndOfFile (h)) - __seterrno (); - else - res = 0; - - /* restore original file pointer location */ - cfd->lseek (prev_loc, 0); - } - } - } - - syscall_printf ("%d = ftruncate (%d, %d)", res, fd, 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) -{ - sigframe thisframe (mainthread); - int fd; - int res = -1; - - fd = open (pathname, O_RDWR); - - if (fd == -1) - set_errno (EBADF); - else - { - res = ftruncate (fd, length); - close (fd); - } - syscall_printf ("%d = truncate (%s, %d)", res, pathname, length); - - return res; -} - -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 -statfs (const char *fname, struct statfs *sfs) -{ - sigframe thisframe (mainthread); - if (!sfs) - { - set_errno (EFAULT); - return -1; - } - - path_conv full_path (fname, PC_SYM_FOLLOW | PC_FULL); - char *root = rootdir (full_path); - - syscall_printf ("statfs %s", root); - - DWORD spc, bps, freec, totalc; - - if (!GetDiskFreeSpace (root, &spc, &bps, &freec, &totalc)) - { - __seterrno (); - return -1; - } - - DWORD vsn, maxlen, flags; - - if (!GetVolumeInformation (root, NULL, 0, &vsn, &maxlen, &flags, NULL, 0)) - { - __seterrno (); - return -1; - } - sfs->f_type = flags; - sfs->f_bsize = spc*bps; - sfs->f_blocks = totalc; - sfs->f_bfree = sfs->f_bavail = freec; - sfs->f_files = -1; - sfs->f_ffree = -1; - sfs->f_fsid = vsn; - sfs->f_namelen = maxlen; - return 0; -} - -extern "C" int -fstatfs (int fd, struct statfs *sfs) -{ - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - return -1; - return statfs (cfd->get_name (), sfs); -} - -/* setpgid: POSIX 4.3.3.1 */ -extern "C" int -setpgid (pid_t pid, pid_t pgid) -{ - sigframe thisframe (mainthread); - int res = -1; - if (pid == 0) - pid = getpid (); - if (pgid == 0) - pgid = pid; - - if (pgid < 0) - { - set_errno (EINVAL); - goto out; - } - else - { - pinfo p (pid); - if (!p) - { - set_errno (ESRCH); - goto out; - } - /* A process may only change the process group of itself and its children */ - if (p == myself || p->ppid == myself->pid) - { - p->pgid = pgid; - if (p->pid != p->pgid) - p->set_has_pgid_children (0); - res = 0; - } - else - { - set_errno (EPERM); - goto out; - } - } -out: - syscall_printf ("pid %d, pgid %d, res %d", pid, pgid, res); - return res; -} - -extern "C" pid_t -getpgid (pid_t pid) -{ - sigframe thisframe (mainthread); - if (pid == 0) - pid = getpid (); - - pinfo p (pid); - if (p == 0) - { - set_errno (ESRCH); - return -1; - } - return p->pgid; -} - -extern "C" int -setpgrp (void) -{ - sigframe thisframe (mainthread); - return setpgid (0, 0); -} - -extern "C" pid_t -getpgrp (void) -{ - sigframe thisframe (mainthread); - return getpgid (0); -} - -extern "C" char * -ptsname (int fd) -{ - sigframe thisframe (mainthread); - cygheap_fdget cfd (fd); - if (cfd < 0) - return 0; - return (char *) (cfd->ptsname ()); -} - -/* FIXME: what is this? */ -extern "C" int -regfree () -{ - return 0; -} - -/* mknod was the call to create directories before the introduction - of mkdir in 4.2BSD and SVR3. Use of mknod required superuser privs - so the mkdir command had to be setuid root. - Although mknod hasn't been implemented yet, some GNU tools (e.g. the - fileutils) assume its existence so we must provide a stub that always - fails. */ -extern "C" int -mknod (const char *_path, mode_t mode, dev_t dev) -{ - set_errno (ENOSYS); - return -1; -} - -extern "C" int -mkfifo (const char *_path, mode_t mode) -{ - set_errno (ENOSYS); - return -1; -} - -/* setgid: POSIX 4.2.2.1 */ -extern "C" int -setgid (gid_t gid) -{ - int ret = setegid (gid); - if (!ret) - cygheap->user.real_gid = myself->gid; - return ret; -} - -/* setuid: POSIX 4.2.2.1 */ -extern "C" int -setuid (uid_t uid) -{ - int ret = seteuid (uid); - if (!ret) - cygheap->user.real_uid = myself->uid; - debug_printf ("real: %d, effective: %d", cygheap->user.real_uid, myself->uid); - return ret; -} - -extern struct passwd *internal_getlogin (cygheap_user &user); - -/* seteuid: standards? */ -extern "C" int -seteuid (uid_t uid) -{ - sigframe thisframe (mainthread); - if (wincap.has_security ()) - { - char orig_username[UNLEN + 1]; - char orig_domain[INTERNET_MAX_HOST_NAME_LENGTH + 1]; - char username[UNLEN + 1]; - DWORD ulen = UNLEN + 1; - char domain[INTERNET_MAX_HOST_NAME_LENGTH + 1]; - DWORD dlen = INTERNET_MAX_HOST_NAME_LENGTH + 1; - SID_NAME_USE use; - - if (uid == (uid_t) -1 || uid == myself->uid) - { - debug_printf ("new euid == current euid, nothing happens"); - return 0; - } - struct passwd *pw_new = getpwuid (uid); - if (!pw_new) - { - set_errno (EINVAL); - return -1; - } - - cygsid tok_usersid; - DWORD siz; - - char *env; - orig_username[0] = orig_domain[0] = '\0'; - if ((env = getenv ("USERNAME"))) - strncat (orig_username, env, UNLEN + 1); - if ((env = getenv ("USERDOMAIN"))) - strncat (orig_domain, env, INTERNET_MAX_HOST_NAME_LENGTH + 1); - if (uid == cygheap->user.orig_uid) - { - - debug_printf ("RevertToSelf () (uid == orig_uid, token=%d)", - cygheap->user.token); - RevertToSelf (); - if (cygheap->user.token != INVALID_HANDLE_VALUE) - cygheap->user.impersonated = FALSE; - - HANDLE ptok = INVALID_HANDLE_VALUE; - if (!OpenProcessToken (GetCurrentProcess (), TOKEN_QUERY, &ptok)) - debug_printf ("OpenProcessToken(): %E\n"); - else if (!GetTokenInformation (ptok, TokenUser, &tok_usersid, - sizeof tok_usersid, &siz)) - debug_printf ("GetTokenInformation(): %E"); - else if (!LookupAccountSid (NULL, tok_usersid, username, &ulen, - domain, &dlen, &use)) - debug_printf ("LookupAccountSid(): %E"); - else - { - setenv ("USERNAME", username, 1); - setenv ("USERDOMAIN", domain, 1); - } - if (ptok != INVALID_HANDLE_VALUE) - CloseHandle (ptok); - } - else - { - cygsid usersid, pgrpsid, tok_pgrpsid; - HANDLE sav_token = INVALID_HANDLE_VALUE; - BOOL sav_impersonation; - BOOL current_token_is_internal_token = FALSE; - BOOL explicitely_created_token = FALSE; - - struct group *gr = getgrgid (myself->gid); - debug_printf ("myself->gid: %d, gr: %d", myself->gid, gr); - - usersid.getfrompw (pw_new); - pgrpsid.getfromgr (gr); - - /* Only when ntsec is ON! */ - /* Check if new user == user of impersonation token and - - if reasonable - new pgrp == pgrp of impersonation token. */ - if (allow_ntsec && cygheap->user.token != INVALID_HANDLE_VALUE) - { - if (!GetTokenInformation (cygheap->user.token, TokenUser, - &tok_usersid, sizeof tok_usersid, &siz)) - { - debug_printf ("GetTokenInformation(): %E"); - tok_usersid = NO_SID; - } - if (!GetTokenInformation (cygheap->user.token, TokenPrimaryGroup, - &tok_pgrpsid, sizeof tok_pgrpsid, &siz)) - { - debug_printf ("GetTokenInformation(): %E"); - tok_pgrpsid = NO_SID; - } - /* Check if the current user token was internally created. */ - TOKEN_SOURCE ts; - if (!GetTokenInformation (cygheap->user.token, TokenSource, - &ts, sizeof ts, &siz)) - debug_printf ("GetTokenInformation(): %E"); - else if (!memcmp (ts.SourceName, "Cygwin.1", 8)) - current_token_is_internal_token = TRUE; - if ((usersid && tok_usersid && usersid != tok_usersid) || - /* Check for pgrp only if current token is an internal - token. Otherwise the external provided token is - very likely overwritten here. */ - (current_token_is_internal_token && - pgrpsid && tok_pgrpsid && pgrpsid != tok_pgrpsid)) - { - /* If not, RevertToSelf and close old token. */ - debug_printf ("tsid != usersid"); - RevertToSelf (); - sav_token = cygheap->user.token; - sav_impersonation = cygheap->user.impersonated; - cygheap->user.token = INVALID_HANDLE_VALUE; - cygheap->user.impersonated = FALSE; - } - } - - /* Only when ntsec is ON! */ - /* If no impersonation token is available, try to - authenticate using NtCreateToken() or subauthentication. */ - if (allow_ntsec && cygheap->user.token == INVALID_HANDLE_VALUE) - { - HANDLE ptok = INVALID_HANDLE_VALUE; - - ptok = create_token (usersid, pgrpsid); - if (ptok != INVALID_HANDLE_VALUE) - explicitely_created_token = TRUE; - else - { - /* create_token failed. Try subauthentication. */ - debug_printf ("create token failed, try subauthentication."); - ptok = subauth (pw_new); - } - if (ptok != INVALID_HANDLE_VALUE) - { - cygwin_set_impersonation_token (ptok); - /* If sav_token was internally created, destroy it. */ - if (sav_token != INVALID_HANDLE_VALUE && - current_token_is_internal_token) - CloseHandle (sav_token); - } - else if (sav_token != INVALID_HANDLE_VALUE) - cygheap->user.token = sav_token; - } - /* If no impersonation is active but an impersonation - token is available, try to impersonate. */ - if (cygheap->user.token != INVALID_HANDLE_VALUE && - !cygheap->user.impersonated) - { - debug_printf ("Impersonate (uid == %d)", uid); - RevertToSelf (); - - /* If the token was explicitely created, all information has - already been set correctly. */ - if (!explicitely_created_token) - { - /* Try setting owner to same value as user. */ - if (usersid && - !SetTokenInformation (cygheap->user.token, TokenOwner, - &usersid, sizeof usersid)) - debug_printf ("SetTokenInformation(user.token, " - "TokenOwner): %E"); - /* Try setting primary group in token to current group - if token not explicitely created. */ - if (pgrpsid && - !SetTokenInformation (cygheap->user.token, - TokenPrimaryGroup, - &pgrpsid, sizeof pgrpsid)) - debug_printf ("SetTokenInformation(user.token, " - "TokenPrimaryGroup): %E"); - - } - - /* Now try to impersonate. */ - if (!LookupAccountSid (NULL, usersid, username, &ulen, - domain, &dlen, &use)) - debug_printf ("LookupAccountSid (): %E"); - else if (!ImpersonateLoggedOnUser (cygheap->user.token)) - system_printf ("Impersonating (%d) in set(e)uid failed: %E", - cygheap->user.token); - else - { - cygheap->user.impersonated = TRUE; - setenv ("USERNAME", username, 1); - setenv ("USERDOMAIN", domain, 1); - } - } - } - - cygheap_user user; - /* user.token is used in internal_getlogin () to determine if - impersonation is active. If so, the token is used for - retrieving user's SID. */ - user.token = cygheap->user.impersonated ? cygheap->user.token - : INVALID_HANDLE_VALUE; - /* Unsetting these both env vars is necessary to get NetUserGetInfo() - called in internal_getlogin (). Otherwise the wrong path is used - after a user switch, probably. */ - unsetenv ("HOMEDRIVE"); - unsetenv ("HOMEPATH"); - struct passwd *pw_cur = internal_getlogin (user); - if (pw_cur != pw_new) - { - debug_printf ("Diffs!!! token: %d, cur: %d, new: %d, orig: %d", - cygheap->user.token, pw_cur->pw_uid, - pw_new->pw_uid, cygheap->user.orig_uid); - setenv ("USERNAME", orig_username, 1); - setenv ("USERDOMAIN", orig_domain, 1); - set_errno (EPERM); - return -1; - } - myself->uid = uid; - cygheap->user = user; - } - else - set_errno (ENOSYS); - debug_printf ("real: %d, effective: %d", cygheap->user.real_uid, myself->uid); - return 0; -} - -/* setegid: from System V. */ -extern "C" int -setegid (gid_t gid) -{ - sigframe thisframe (mainthread); - if (wincap.has_security ()) - { - if (gid != (gid_t) -1) - { - struct group *gr; - - if (!(gr = getgrgid (gid))) - { - set_errno (EINVAL); - return -1; - } - myself->gid = gid; - if (allow_ntsec) - { - cygsid gsid; - HANDLE ptok; - - if (gsid.getfromgr (gr)) - { - if (!OpenProcessToken (GetCurrentProcess (), - TOKEN_ADJUST_DEFAULT, - &ptok)) - debug_printf ("OpenProcessToken(): %E\n"); - else - { - if (!SetTokenInformation (ptok, TokenPrimaryGroup, - &gsid, sizeof gsid)) - debug_printf ("SetTokenInformation(myself, " - "TokenPrimaryGroup): %E"); - CloseHandle (ptok); - } - } - } - } - } - else - set_errno (ENOSYS); - return 0; -} - -/* chroot: privileged Unix system call. */ -/* FIXME: Not privileged here. How should this be done? */ -extern "C" int -chroot (const char *newroot) -{ - sigframe thisframe (mainthread); - path_conv path (newroot, PC_SYM_FOLLOW | PC_FULL); - - int ret; - if (path.error) - ret = -1; - else if (!path.exists ()) - { - set_errno (ENOENT); - ret = -1; - } - else if (!path.isdir ()) - { - set_errno (ENOTDIR); - ret = -1; - } - else - { - char buf[MAX_PATH]; - normalize_posix_path (newroot, buf); - cygheap->root.set (buf, path); - 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) -{ - sigframe thisframe (mainthread); - return open (path, O_WRONLY | O_CREAT | O_TRUNC, mode); -} - -extern "C" void -__assertfail () -{ - exit (99); -} - -extern "C" int -getw (FILE *fp) -{ - sigframe thisframe (mainthread); - int w, ret; - ret = fread (&w, sizeof (int), 1, fp); - return ret != 1 ? EOF : w; -} - -extern "C" int -putw (int w, FILE *fp) -{ - sigframe thisframe (mainthread); - int ret; - ret = fwrite (&w, sizeof (int), 1, fp); - if (feof (fp) || ferror (fp)) - return -1; - return 0; -} - -extern "C" int -wcscmp (const wchar_t *s1, const wchar_t *s2) -{ - while (*s1 && *s1 == *s2) - { - s1++; - s2++; - } - - return (* (unsigned short *) s1) - (* (unsigned short *) s2); -} - -extern "C" size_t -wcslen (const wchar_t *s1) -{ - int l = 0; - while (s1[l]) - l++; - return l; -} - -/* FIXME: to do this right, maybe work out the usoft va_list machine - and use wsvprintfW instead? -*/ -extern "C" int -wprintf (const char *fmt, ...) -{ - va_list ap; - int ret; - - va_start (ap, fmt); - ret = vprintf (fmt, ap); - va_end (ap); - return ret; -} - -extern "C" int -vhangup () -{ - set_errno (ENOSYS); - return -1; -} - -extern "C" _PTR -memccpy (_PTR out, const _PTR in, int c, size_t len) -{ - const char *inc = (char *) in; - char *outc = (char *) out; - - while (len) - { - char x = *inc++; - *outc++ = x; - if (x == c) - return outc; - len --; - } - return 0; -} - -extern "C" int -nice (int incr) -{ - sigframe thisframe (mainthread); - DWORD priority[] = - { - IDLE_PRIORITY_CLASS, - IDLE_PRIORITY_CLASS, - NORMAL_PRIORITY_CLASS, - HIGH_PRIORITY_CLASS, - REALTIME_PRIORITY_CLASS, - REALTIME_PRIORITY_CLASS - }; - int curr = 2; - - switch (GetPriorityClass (hMainProc)) - { - case IDLE_PRIORITY_CLASS: - curr = 1; - break; - case NORMAL_PRIORITY_CLASS: - curr = 2; - break; - case HIGH_PRIORITY_CLASS: - curr = 3; - break; - case REALTIME_PRIORITY_CLASS: - curr = 4; - break; - } - if (incr > 0) - incr = -1; - else if (incr < 0) - incr = 1; - - if (SetPriorityClass (hMainProc, priority[curr + incr]) == FALSE) - { - __seterrno (); - return -1; - } - - return 0; -} - -/* - * 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; -} - -extern "C" void -login (struct utmp *ut) -{ - sigframe thisframe (mainthread); - register int fd; - int currtty = ttyslot (); - - if (currtty >= 0 && (fd = open (_PATH_UTMP, O_WRONLY | O_CREAT | O_BINARY, - 0644)) >= 0) - { - (void) lseek (fd, (long) (currtty * sizeof (struct utmp)), SEEK_SET); - (void) write (fd, (char *) ut, sizeof (struct utmp)); - (void) close (fd); - } - if ((fd = open (_PATH_WTMP, O_WRONLY | O_APPEND | O_BINARY, 0)) >= 0) - { - (void) write (fd, (char *) ut, sizeof (struct utmp)); - (void) close (fd); - } -} - -/* It isn't possible to use unix-style I/O function in logout code because -cygwin's I/O subsystem may be inaccessible at logout () call time. -FIXME (cgf): huh? -*/ -extern "C" int -logout (char *line) -{ - sigframe thisframe (mainthread); - int res = 0; - HANDLE ut_fd; - static const char path_utmp[] = _PATH_UTMP; - - path_conv win32_path (path_utmp); - if (win32_path.error) - return 0; - - ut_fd = CreateFile (win32_path.get_win32 (), - GENERIC_READ | GENERIC_WRITE, - FILE_SHARE_READ | FILE_SHARE_WRITE, - &sec_none_nih, - OPEN_EXISTING, - FILE_ATTRIBUTE_NORMAL, - NULL); - if (ut_fd != INVALID_HANDLE_VALUE) - { - struct utmp *ut; - struct utmp ut_buf[100]; - off_t pos = 0; /* Position in file */ - DWORD rd; - - while (!res && ReadFile (ut_fd, ut_buf, sizeof ut_buf, &rd, NULL) - && rd != 0) - { - struct utmp *ut_end = (struct utmp *) ((char *) ut_buf + rd); - - for (ut = ut_buf; ut < ut_end; ut++, pos += sizeof (*ut)) - if (ut->ut_name[0] - && strncmp (ut->ut_line, line, sizeof (ut->ut_line)) == 0) - /* Found the entry for LINE; mark it as logged out. */ - { - /* Zero out entries describing who's logged in. */ - bzero (ut->ut_name, sizeof (ut->ut_name)); - bzero (ut->ut_host, sizeof (ut->ut_host)); - time (&ut->ut_time); - - /* Now seek back to the position in utmp at which UT occured, - and write the new version of UT there. */ - if ((SetFilePointer (ut_fd, pos, 0, FILE_BEGIN) != 0xFFFFFFFF) - && (WriteFile (ut_fd, (char *) ut, sizeof (*ut), - &rd, NULL))) - { - res = 1; - break; - } - } - } - - CloseHandle (ut_fd); - } - - return res; -} |