53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
/* fcntl.cc: fcntl syscall
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Copyright 1996, 1997, 1998, 1999, 2000, 2001 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 <fcntl.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <unistd.h>
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#include "security.h"
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#include "fhandler.h"
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#include "path.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "cygerrno.h"
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#include "thread.h"
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extern "C"
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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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int res;
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if (cygheap->fdtab.not_open (fd))
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{
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set_errno (EBADF);
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res = -1;
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goto done;
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}
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SetResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK, "_fcntl");
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va_start (args, cmd);
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arg = va_arg (args, void *);
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if (cmd == F_DUPFD)
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res = dup2 (fd, cygheap->fdtab.find_unused_handle ((int) arg));
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else
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res = cygheap->fdtab[fd]->fcntl(cmd, arg);
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va_end (args);
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ReleaseResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK,"_fcntl");
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done:
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syscall_printf ("%d = fcntl (%d, %d, %p)", res, fd, cmd, arg);
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return res;
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}
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