107 lines
1.9 KiB
C++
107 lines
1.9 KiB
C++
|
/* fcntl.cc: fcntl syscall
|
||
|
|
|
||
|
|
Copyright 1996, 1997, 1998 Cygnus Solutions.
|
||
|
|
|
||
|
|
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 <fcntl.h>
|
||
|
|
#include <stdarg.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include "winsup.h"
|
||
|
|
|
||
|
|
extern "C"
|
||
|
|
int
|
||
|
|
_fcntl (int fd, int cmd,...)
|
||
|
|
{
|
||
|
|
va_list args;
|
||
|
|
int arg = 0;
|
||
|
|
int res;
|
||
|
|
SetResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK, "_fcntl");
|
||
|
|
|
||
|
|
if (dtable.not_open (fd))
|
||
|
|
{
|
||
|
|
set_errno (EBADF);
|
||
|
|
res = -1;
|
||
|
|
goto done;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (cmd)
|
||
|
|
{
|
||
|
|
case F_DUPFD:
|
||
|
|
va_start (args, cmd);
|
||
|
|
arg = va_arg (args,int);
|
||
|
|
va_end (args);
|
||
|
|
res = dup2 (fd, dtable.find_unused_handle (arg));
|
||
|
|
goto done;
|
||
|
|
|
||
|
|
case F_GETFD:
|
||
|
|
res = dtable[fd]->get_close_on_exec () ? FD_CLOEXEC : 0;
|
||
|
|
goto done;
|
||
|
|
|
||
|
|
case F_SETFD:
|
||
|
|
va_start (args, cmd);
|
||
|
|
arg = va_arg (args, int);
|
||
|
|
va_end (args);
|
||
|
|
dtable[fd]->set_close_on_exec (arg);
|
||
|
|
res = 0;
|
||
|
|
goto done;
|
||
|
|
|
||
|
|
case F_GETFL:
|
||
|
|
{
|
||
|
|
res = dtable[fd]->get_flags ();
|
||
|
|
goto done;
|
||
|
|
}
|
||
|
|
case F_SETFL:
|
||
|
|
{
|
||
|
|
int temp = 0;
|
||
|
|
|
||
|
|
va_start (args, cmd);
|
||
|
|
arg = va_arg (args, int);
|
||
|
|
va_end (args);
|
||
|
|
|
||
|
|
if (arg & O_RDONLY)
|
||
|
|
temp |= GENERIC_READ;
|
||
|
|
if (arg & O_WRONLY)
|
||
|
|
temp |= GENERIC_WRITE;
|
||
|
|
|
||
|
|
syscall_printf ("fcntl (%d, F_SETFL, %d)", arg);
|
||
|
|
|
||
|
|
dtable[fd]->set_access (temp);
|
||
|
|
dtable[fd]->set_flags (arg);
|
||
|
|
|
||
|
|
res = 0;
|
||
|
|
goto done;
|
||
|
|
}
|
||
|
|
|
||
|
|
case F_GETLK:
|
||
|
|
case F_SETLK:
|
||
|
|
case F_SETLKW:
|
||
|
|
{
|
||
|
|
struct flock *fl;
|
||
|
|
va_start (args, cmd);
|
||
|
|
fl = va_arg (args,struct flock *);
|
||
|
|
va_end (args);
|
||
|
|
res = dtable[fd]->lock (cmd, fl);
|
||
|
|
goto done;
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
set_errno (EINVAL);
|
||
|
|
res = -1;
|
||
|
|
goto done;
|
||
|
|
}
|
||
|
|
|
||
|
|
set_errno (ENOSYS);
|
||
|
|
res = -1;
|
||
|
|
|
||
|
|
done:
|
||
|
|
ReleaseResourceLock(LOCK_FD_LIST,WRITE_LOCK|READ_LOCK,"_fcntl");
|
||
|
|
|
||
|
|
syscall_printf ("%d = fcntl (%d, %d, %d)", res, fd, cmd, arg);
|
||
|
|
return res;
|
||
|
|
}
|