diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 2313 |
1 files changed, 0 insertions, 2313 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc deleted file mode 100644 index 25dc93c16..000000000 --- a/winsup/cygwin/syscalls.cc +++ /dev/null @@ -1,2313 +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 <lmcons.h> /* for UNLEN */ -#include <cygwin/version.h> -#include <sys/cygwin.h> -#include "cygerrno.h" -#include "perprocess.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 "security.h" -#include "cygheap.h" - -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 (); -} - -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 ()); - - DWORD atts; - atts = win32_name.file_attributes (); - if (atts != 0xffffffff && atts & FILE_ATTRIBUTE_DIRECTORY) - { - 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 (atts != 0xffffffff && atts & FILE_ATTRIBUTE_READONLY) - { - int len = strlen (win32_name.get_win32 ()); - if (len > 4 && strcasematch (win32_name.get_win32 () + len - 4, ".lnk")) - SetFileAttributes (win32_name.get_win32 (), - win32_name.file_attributes () & ~FILE_ATTRIBUTE_READONLY); - } - - for (int i = 0; i < 2; i++) - { - if (DeleteFile (win32_name)) - { - syscall_printf ("DeleteFile succeeded"); - res = 0; - break; - } - - DWORD lasterr; - lasterr = GetLastError (); - - /* FIXME: There's a race here. */ - HANDLE 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) - { - CloseHandle (h); - syscall_printf ("CreateFile/CloseHandle succeeded"); - if (os_being_run == winNT || GetFileAttributes (win32_name) == (DWORD) -1) - { - res = 0; - break; - } - } - - if (i > 0) - { - DWORD dtype; - if (os_being_run == winNT || lasterr != ERROR_ACCESS_DENIED) - goto err; - - char root[MAX_PATH]; - strcpy (root, win32_name); - dtype = GetDriveType (rootdir (root)); - if (dtype & DRIVE_REMOTE) - { - syscall_printf ("access denied on remote drive"); - goto err; /* Can't detect this, unfortunately */ - } - lasterr = ERROR_SHARING_VIOLATION; - } - - syscall_printf ("i %d, couldn't delete file, %E", i); - - /* If we get ERROR_SHARING_VIOLATION, the file may still be open - - Windows NT doesn't support deleting a file while it's open. */ - if (lasterr == ERROR_SHARING_VIOLATION) - { - cygwin_shared->delqueue.queue_file (win32_name); - res = 0; - break; - } - - /* if access denied, chmod to be writable in case it is not - and try again */ - /* FIXME: Should check whether ourname is directory or file - and only try again if permissions are not sufficient */ - if (lasterr == ERROR_ACCESS_DENIED && chmod (win32_name, 0777) == 0) - continue; - - err: - __seterrno (); - res = -1; - break; - } - -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; - } - - DWORD atts = win32_name.file_attributes (); - if (atts != 0xffffffff && atts & FILE_ATTRIBUTE_DIRECTORY) - return rmdir (ourname); - - return _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) -{ - /* FIXME: for now */ - if (myself->pgid != _getpid ()) - { - 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) -{ - int res; - fhandler_base *fh; - extern int sigcatchers; - - while (1) - { - sigframe thisframe (mainthread); - - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - return -1; - } - - // set_sig_errno (0); - fh = cygheap->fdtab[fd]; - DWORD wait = (fh->get_flags () & (O_NONBLOCK | OLD_O_NDELAY)) ? 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 && (!sigcatchers || !fh->is_slow () || fh->get_r_no_interrupt ())) - debug_printf ("non-interruptible read\n"); - else if (!fh->ready_for_read (fd, wait, 0)) - { - if (!wait) - set_sig_errno (EAGAIN); /* Don't really need 'set_sig_errno' here, but... */ - else - set_sig_errno (EINTR); - res = -1; - goto out; - } - - /* Check to see if this is a background read from a "tty", - sending a SIGTTIN, if appropriate */ - res = fh->bg_check (SIGTTIN); - if (res > bg_eof) - { - myself->process_state |= PID_TTYIN; - res = fh->read (ptr, len); - myself->process_state &= ~PID_TTYIN; - } - - out: - if (res >= 0 || get_errno () != EINTR || !thisframe.call_signal_handler ()) - break; - } - - syscall_printf ("%d = read (%d<%s>, %p, %d), bin %d, errno %d", res, fd, fh->get_name (), - ptr, len, fh->get_r_binary (), get_errno ()); - MALLOC_CHECK; - return res; -} - -extern "C" ssize_t -_write (int fd, const void *ptr, size_t len) -{ - int res = -1; - sigframe thisframe (mainthread); - - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - 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); - - fhandler_base *fh; - fh = cygheap->fdtab[fd]; - - res = fh->bg_check (SIGTTOU); -syscall_printf ("write fh %p, name '%s' bg_check %d, bg_eof %d", fh, fh->get_name(), res, bg_eof); - if (res > bg_eof) - { - myself->process_state |= PID_TTYOU; - res = fh->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); - - MALLOC_CHECK; - 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 fd; - int res = -1; - va_list ap; - mode_t mode = 0; - fhandler_base *fh; - sigframe thisframe (mainthread); - - syscall_printf ("open (%s, %p)", unix_path, flags); - if (!check_null_empty_path_errno (unix_path)) - { - SetResourceLock (LOCK_FD_LIST, WRITE_LOCK|READ_LOCK, " open "); - - /* check for optional mode argument */ - va_start (ap, flags); - mode = va_arg (ap, mode_t); - va_end (ap); - - fd = cygheap->fdtab.find_unused_handle (); - - if (fd < 0) - set_errno (ENMFILE); - else if ((fh = cygheap->fdtab.build_fhandler (fd, unix_path, NULL)) == NULL) - res = -1; // errno already set - else if (!fh->open (unix_path, flags, (mode & 0777) & ~cygheap->umask)) - { - cygheap->fdtab.release (fd); - res = -1; - } - else if ((res = fd) <= 2) - set_std_handle (res); - ReleaseResourceLock (LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," open"); - } - - 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 if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - res = -1; - } - else - { - res = cygheap->fdtab[fd]->lseek (pos, dir); - } - 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; - if (cygheap->fdtab.not_open (fd)) - { - debug_printf ("handle %d not open", fd); - set_errno (EBADF); - res = -1; - } - else - { - SetResourceLock (LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," close"); - res = cygheap->fdtab[fd]->close (); - cygheap->fdtab.release (fd); - ReleaseResourceLock (LOCK_FD_LIST,WRITE_LOCK|READ_LOCK," close"); - } - - syscall_printf ("%d = close (%d)", res, fd); - MALLOC_CHECK; - return res; -} - -extern "C" int -isatty (int fd) -{ - int res; - sigframe thisframe (mainthread); - - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf ("0 = isatty (%d)", fd); - return 0; - } - - res = cygheap->fdtab[fd]->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.file_attributes () != (DWORD)-1) - { - 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 (os_being_run == winNT) - { - 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_path_errno (name)) - return -1; - - if (os_being_run != winNT) // 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.file_attributes () & FILE_ATTRIBUTE_DIRECTORY) - 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.file_attributes () & FILE_ATTRIBUTE_DIRECTORY) - attrib |= S_IFDIR; - res = set_file_attribute (win32_path.has_acls (), - win32_path.get_win32 (), - uid, gid, attrib, - cygheap->user.logsrv ()); - } - if (res != 0 && get_errno () == ENOSYS) - { - /* 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); - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf ("-1 = fchown (%d,...)", fd); - set_errno (EBADF); - return -1; - } - - const char *path = cygheap->fdtab[fd]->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.file_attributes () == (DWORD)-1) - __seterrno (); - else - { - DWORD attr = win32_path.file_attributes (); - /* temporary erase read only bit, to be able to set file security */ - SetFileAttributesA (win32_path.get_win32 (), - attr & ~FILE_ATTRIBUTE_READONLY); - - uid_t uid; - gid_t gid; - - if (win32_path.file_attributes () & FILE_ATTRIBUTE_DIRECTORY) - mode |= S_IFDIR; - get_file_attribute (win32_path.has_acls (), - win32_path.get_win32 (), - NULL, &uid, &gid); - if (win32_path.file_attributes () & FILE_ATTRIBUTE_DIRECTORY) - mode |= S_IFDIR; - if (!set_file_attribute (win32_path.has_acls (), - win32_path.get_win32 (), - 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)) - attr &= ~FILE_ATTRIBUTE_READONLY; - else - attr |= FILE_ATTRIBUTE_READONLY; - - if (S_ISLNK (mode) || S_ISSOCK (mode)) - attr |= FILE_ATTRIBUTE_SYSTEM; - - if (!SetFileAttributesA (win32_path.get_win32 (), attr)) - __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); - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf ("-1 = fchmod (%d, 0%o)", fd, mode); - set_errno (EBADF); - return -1; - } - - const char *path = cygheap->fdtab[fd]->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); -} - -/* Cygwin internal */ -static int -num_entries (const char *win32_name) -{ - WIN32_FIND_DATA buf; - HANDLE handle; - char buf1[MAX_PATH]; - int count = 0; - - strcpy (buf1, win32_name); - int len = strlen (buf1); - if (len == 0 || isdirsep (buf1[len - 1])) - strcat (buf1, "*"); - else - strcat (buf1, "/*"); /* */ - - handle = FindFirstFileA (buf1, &buf); - - if (handle == INVALID_HANDLE_VALUE) - return 0; - count ++; - while (FindNextFileA (handle, &buf)) - { - if ((buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) - count ++; - } - FindClose (handle); - return count; -} - -extern "C" int -_fstat (int fd, struct stat *buf) -{ - int r; - sigframe thisframe (mainthread); - - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf ("-1 = fstat (%d, %p)", fd, buf); - set_errno (EBADF); - r = -1; - } - else - { - memset (buf, 0, sizeof (struct stat)); - r = cygheap->fdtab[fd]->fstat (buf); - syscall_printf ("%d = fstat (%d, %x)", r, fd, buf); - } - - return r; -} - -/* fsync: P96 6.6.1.1 */ -extern "C" int -fsync (int fd) -{ - sigframe thisframe (mainthread); - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf ("-1 = fsync (%d)", fd); - set_errno (EBADF); - return -1; - } - - HANDLE h = cygheap->fdtab[fd]->get_handle (); - - if (FlushFileBuffers (h) == 0) - { - __seterrno (); - return -1; - } - return 0; -} - -/* sync: standards? */ -extern "C" int -sync () -{ - return 0; -} - -int __stdcall -stat_dev (DWORD devn, int unit, unsigned long ino, struct stat *buf) -{ - sigframe thisframe (mainthread); - switch (devn) - { - case FH_PIPEW: - buf->st_mode = STD_WBITS | S_IWGRP | S_IWOTH; - break; - case FH_PIPER: - buf->st_mode = STD_RBITS; - break; - default: - buf->st_mode = STD_RBITS | STD_WBITS | S_IWGRP | S_IWOTH; - break; - } - - buf->st_mode |= S_IFCHR; - buf->st_blksize = S_BLKSIZE; - buf->st_nlink = 1; - buf->st_dev = buf->st_rdev = FHDEVN (devn) << 8 | (unit & 0xff); - buf->st_ino = ino; - buf->st_atime = buf->st_mtime = buf->st_ctime = time (NULL); - return 0; -} - -suffix_info stat_suffixes[] = -{ - suffix_info ("", 1), - suffix_info (".exe", 1), - suffix_info (NULL) -}; - -/* Cygwin internal */ -static int -stat_worker (const char *caller, const char *name, struct stat *buf, - int nofollow) -{ - int res = -1; - int oret = 1; - int atts; - - int attribute = 0; - uid_t uid; - gid_t gid; - - char root[MAX_PATH]; - UINT dtype; - fhandler_disk_file fh (NULL); - - MALLOC_CHECK; - - debug_printf ("%s (%s, %p)", caller, name, buf); - - path_conv real_path (name, (nofollow ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW) | - PC_FULL, stat_suffixes); - - if (real_path.error) - { - set_errno (real_path.error); - goto done; - } - - memset (buf, 0, sizeof (struct stat)); - - if (real_path.is_device ()) - return stat_dev (real_path.get_devn (), real_path.get_unitn (), - hash_path_name (0, real_path.get_win32 ()), buf); - - atts = real_path.file_attributes (); - - debug_printf ("%d = file_attributes for '%s'", atts, real_path.get_win32 ()); - - strcpy (root, real_path.get_win32 ()); - dtype = GetDriveType (rootdir (root)); - - if ((atts == -1 || ! (atts & FILE_ATTRIBUTE_DIRECTORY) || - (os_being_run == winNT - && dtype != DRIVE_NO_ROOT_DIR - && dtype != DRIVE_UNKNOWN))) - { - oret = fh.open (real_path, O_RDONLY | O_BINARY | O_DIROPEN | - (nofollow ? O_NOSYMLINK : 0), 0); - /* Check a special case here. If ntsec is ON it happens - that a process creates a file using mode 000 to disallow - other processes access. In contrast to UNIX, this results - in a failing open call in the same process. Check that - case. */ - if (!oret && allow_ntsec && get_errno () == EACCES - && !get_file_attribute (TRUE, real_path, &attribute, &uid, &gid) - && !attribute && uid == myself->uid && gid == myself->gid) - { - set_file_attribute (TRUE, real_path, 0400); - oret = fh.open (real_path, O_RDONLY | O_BINARY | O_DIROPEN | - (nofollow ? O_NOSYMLINK : 0), 0); - set_file_attribute (TRUE, real_path.get_win32 (), 0); - } - if (oret) - { - res = fh.fstat (buf); - fh.close (); - /* The number of links to a directory includes the - number of subdirectories in the directory, since all - those subdirectories point to it. - This is too slow on remote drives, so we do without it and - set the number of links to 2. */ - /* Unfortunately the count of 2 confuses `find (1)' command. So - let's try it with `1' as link count. */ - if (atts != -1 && (atts & FILE_ATTRIBUTE_DIRECTORY)) - buf->st_nlink = (dtype == DRIVE_REMOTE - ? 1 - : num_entries (real_path.get_win32 ())); - goto done; - } - } - if (atts != -1 && (oret || (!oret && get_errno () != ENOENT - && get_errno () != ENOSHARE))) - { - /* Unfortunately, the above open may fail if the file exists, though. - So we have to care for this case here, too. */ - WIN32_FIND_DATA wfd; - HANDLE handle; - buf->st_nlink = 1; - if (atts != -1 - && (atts & FILE_ATTRIBUTE_DIRECTORY) - && dtype != DRIVE_REMOTE) - buf->st_nlink = num_entries (real_path.get_win32 ()); - buf->st_dev = FHDEVN (FH_DISK) << 8; - buf->st_ino = hash_path_name (0, real_path.get_win32 ()); - if (atts != -1 && (atts & FILE_ATTRIBUTE_DIRECTORY)) - buf->st_mode = S_IFDIR; - else if (real_path.issymlink ()) - buf->st_mode = S_IFLNK; - else if (real_path.issocket ()) - buf->st_mode = S_IFSOCK; - else - buf->st_mode = S_IFREG; - if (!real_path.has_acls () - || get_file_attribute (real_path.has_acls (), real_path.get_win32 (), - &buf->st_mode, &buf->st_uid, &buf->st_gid)) - { - buf->st_mode |= STD_RBITS | STD_XBITS; - if ((atts & FILE_ATTRIBUTE_READONLY) == 0) - buf->st_mode |= STD_WBITS; - if (real_path.issymlink ()) - buf->st_mode |= S_IRWXU | S_IRWXG | S_IRWXO; - get_file_attribute (FALSE, real_path.get_win32 (), - NULL, &buf->st_uid, &buf->st_gid); - } - if ((handle = FindFirstFile (real_path.get_win32 (), &wfd)) - != INVALID_HANDLE_VALUE) - { - buf->st_atime = to_time_t (&wfd.ftLastAccessTime); - buf->st_mtime = to_time_t (&wfd.ftLastWriteTime); - buf->st_ctime = to_time_t (&wfd.ftCreationTime); - buf->st_size = wfd.nFileSizeLow; - buf->st_blksize = S_BLKSIZE; - buf->st_blocks = ((unsigned long) buf->st_size + - S_BLKSIZE-1) / S_BLKSIZE; - FindClose (handle); - } - res = 0; - } - - done: - MALLOC_CHECK; - syscall_printf ("%d = %s (%s, %p)", res, caller, name, buf); - return res; -} - -extern "C" int -_stat (const char *name, struct stat *buf) -{ - sigframe thisframe (mainthread); - return stat_worker ("stat", 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); - return stat_worker ("lstat", 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 (fn, &st); - 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; - - 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.get_win32 ()) - || !writable_directory (real_new.get_win32 ())) - { - syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath); - set_errno (EACCES); - return -1; - } - - if (real_old.file_attributes () == (DWORD) -1) /* file to move doesn't exist */ - { - syscall_printf ("file to move doesn't exist"); - set_errno (ENOENT); - return (-1); - } - - if (real_new.file_attributes () != (DWORD) -1 && - real_new.file_attributes () & FILE_ATTRIBUTE_READONLY) - { - /* Destination file exists and is read only, change that or else - the rename won't work. */ - SetFileAttributesA (real_new.get_win32 (), real_new.file_attributes () & ~ FILE_ATTRIBUTE_READONLY); - } - - if (!MoveFile (real_old.get_win32 (), real_new.get_win32 ())) - res = -1; - - if (res == 0 || (GetLastError () != ERROR_ALREADY_EXISTS - && GetLastError () != ERROR_FILE_EXISTS)) - goto done; - - if (os_being_run == winNT) - { - if (MoveFileEx (real_old.get_win32 (), real_new.get_win32 (), - MOVEFILE_REPLACE_EXISTING)) - res = 0; - } - else - { - syscall_printf ("try win95 hack"); - for (;;) - { - 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 (); - - if (res == 0) - { - /* make the new file have the permissions of the old one */ - SetFileAttributesA (real_new.get_win32 (), real_old.file_attributes ()); - } - - syscall_printf ("%d = rename (%s, %s)", res, real_old.get_win32 (), - real_new.get_win32 ()); - - return res; -} - -extern "C" int -system (const char *cmdstring) -{ - 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; -} - -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 (os_being_run != winNT) - 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) -{ - 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 4096; - case _PC_CHOWN_RESTRICTED: - case _PC_NO_TRUNC: - return -1; - case _PC_VDISABLE: - if (isatty (fd)) - return -1; - else - { - set_errno (EBADF); - return -1; - } - case _PC_POSIX_PERMISSIONS: - case _PC_POSIX_SECURITY: - if (cygheap->fdtab.not_open (fd)) - set_errno (EBADF); - else - { - fhandler_base *fh = cygheap->fdtab[fd]; - if (fh->get_device () == FH_DISK) - return check_posix_perm (fh->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 4096; - 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) -{ - if (cygheap->fdtab.not_open (fd) || !cygheap->fdtab[fd]->is_tty ()) - { - return 0; - } - return (char *) (cygheap->fdtab[fd]->ttyname ()); -} - -extern "C" char * -ctermid (char *str) -{ - static NO_COPY char buf[16]; - if (str == NULL) - str = buf; - if (!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 */ - } - - if (cygheap->fdtab.not_open (fd)) - { - syscall_printf (" _cifs: fd not open\n"); - return 0; - } - - fhandler_base *p = cygheap->fdtab[fd]; - - if (p->get_device () != FH_DISK) - { - syscall_printf (" _cifs: fd not disk file\n"); - return 0; - } - - if (p->get_w_binary () || p->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) -{ - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - return -1; - } - - return cygheap->fdtab[fd]->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) -{ - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - return -1; - } - if (mode != O_BINARY && mode != O_TEXT) - { - set_errno (EINVAL); - return -1; - } - - fhandler_base *p = cygheap->fdtab[fd]; - - /* 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 (p->get_w_binary () && p->get_r_binary ()) - res = O_BINARY; - else - res = O_TEXT; - - if (mode & O_BINARY) - { - p->set_w_binary (1); - p->set_r_binary (1); - } - else - { - p->set_w_binary (0); - p->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, p->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 (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - } - else - { - HANDLE h = cygheap->fdtab[fd]->get_handle (); - off_t prev_loc; - - if (h) - { - /* remember curr file pointer location */ - prev_loc = cygheap->fdtab[fd]->lseek (0, SEEK_CUR); - - cygheap->fdtab[fd]->lseek (length, SEEK_SET); - if (!SetEndOfFile (h)) - { - __seterrno (); - } - else - res = 0; - - /* restore original file pointer location */ - cygheap->fdtab[fd]->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 */ -/* FIXME: untested */ -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 = -1; - - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - } - else - { - res = (long) cygheap->fdtab[fd]->get_handle (); - } - 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); - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - return -1; - } - fhandler_disk_file *f = (fhandler_disk_file *) cygheap->fdtab[fd]; - return statfs (f->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); - if (cygheap->fdtab.not_open (fd)) - { - set_errno (EBADF); - return 0; - } - return (char *) (cygheap->fdtab[fd]->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 const char *internal_getlogin (cygheap_user &user); - -/* seteuid: standards? */ -extern "C" int -seteuid (uid_t uid) -{ - sigframe thisframe (mainthread); - if (os_being_run == winNT) - { - if (uid != (uid_t) -1) - { - struct passwd *pw_new = getpwuid (uid); - if (!pw_new) - { - set_errno (EINVAL); - return -1; - } - - if (uid != myself->uid) - 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; - } - else if (!cygheap->user.impersonated) - { - debug_printf ("Impersonate (uid == %d)", uid); - RevertToSelf (); - if (cygheap->user.token != INVALID_HANDLE_VALUE) - if (!ImpersonateLoggedOnUser (cygheap->user.token)) - system_printf ("Impersonate (%d) in set (e)uid failed: %E", - cygheap->user.token); - else - cygheap->user.impersonated = TRUE; - } - - 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; - struct passwd *pw_cur = getpwnam (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); - 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 (os_being_run == winNT) - { - if (gid != (gid_t) -1) - { - if (!getgrgid (gid)) - { - set_errno (EINVAL); - return -1; - } - myself->gid = gid; - } - } - 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); - int ret = -1; - path_conv path (newroot, PC_SYM_FOLLOW | PC_FULL); - - if (path.error) - goto done; - if (path.file_attributes () == (DWORD)-1) - { - set_errno (ENOENT); - goto done; - } - if (! (path.file_attributes () & FILE_ATTRIBUTE_DIRECTORY)) - { - set_errno (ENOTDIR); - goto done; - } - char buf[MAX_PATH + 1]; - ret = mount_table->conv_to_posix_path (path.get_win32 (), buf, 0); - if (ret) - { - set_errno (ret); - goto done; - } - cygheap->root = buf; - ret = 0; - -done: - 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; -} |