114 lines
2.3 KiB
C++
114 lines
2.3 KiB
C++
/* fcntl.cc: fcntl syscall
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2008,
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2009, 2010, 2011, 2012 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <unistd.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "cygtls.h"
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extern "C" int
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fcntl64 (int fd, int cmd, ...)
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{
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int res = -1;
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void *arg = NULL;
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va_list args;
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pthread_testcancel ();
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debug_printf ("fcntl(%d, %d, ...)", fd, cmd);
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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cygheap_fdget cfd (fd, true);
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if (cfd < 0)
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goto done;
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va_start (args, cmd);
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arg = va_arg (args, void *);
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va_end (args);
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switch (cmd)
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{
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case F_DUPFD:
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case F_DUPFD_CLOEXEC:
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if ((int) arg >= 0 && (int) arg < OPEN_MAX_MAX)
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{
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int flags = cmd == F_DUPFD_CLOEXEC ? O_CLOEXEC : 0;
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res = cygheap->fdtab.dup3 (fd, cygheap_fdnew (((int) arg) - 1), flags);
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}
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else
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{
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set_errno (EINVAL);
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res = -1;
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}
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break;
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case F_GETLK:
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case F_SETLK:
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case F_SETLKW:
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{
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struct __flock64 *fl = (struct __flock64 *) arg;
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fl->l_type &= F_RDLCK | F_WRLCK | F_UNLCK;
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res = cfd->lock (cmd, fl);
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}
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break;
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default:
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res = cfd->fcntl (cmd, arg);
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break;
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}
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done:
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syscall_printf ("%R = fcntl(%d, %d, %p)", res, fd, cmd, arg);
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return res;
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}
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extern "C" int
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_fcntl (int fd, int cmd, ...)
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{
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void *arg = NULL;
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va_list args;
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struct __flock32 *src = NULL;
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struct __flock64 dst;
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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va_start (args, cmd);
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arg = va_arg (args, void *);
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va_end (args);
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if (cmd == F_GETLK || cmd == F_SETLK || cmd == F_SETLKW)
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{
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src = (struct __flock32 *) arg;
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dst.l_type = src->l_type;
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dst.l_whence = src->l_whence;
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dst.l_start = src->l_start;
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dst.l_len = src->l_len;
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dst.l_pid = src->l_pid;
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arg = &dst;
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}
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int res = fcntl64 (fd, cmd, arg);
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if (cmd == F_GETLK)
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{
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src->l_type = dst.l_type;
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src->l_whence = dst.l_whence;
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src->l_start = dst.l_start;
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src->l_len = dst.l_len;
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src->l_pid = (short) dst.l_pid;
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}
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return res;
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}
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