mirror of https://github.com/tmux/tmux.git
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*
|
|
* Copyright (c) 2013 Nicholas Marriott <nicm@users.sourceforge.net>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdarg.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
int
|
|
openat(int fd, const char *path, int flags, ...)
|
|
{
|
|
mode_t mode;
|
|
va_list ap;
|
|
int dotfd, retval, saved_errno;
|
|
|
|
if (flags & O_CREAT) {
|
|
va_start(ap, flags);
|
|
mode = va_arg(ap, mode_t);
|
|
va_end(ap);
|
|
} else
|
|
mode = 0;
|
|
|
|
dotfd = -1;
|
|
if (fd != AT_FDCWD) {
|
|
dotfd = open(".", O_RDONLY);
|
|
if (dotfd == -1)
|
|
return (-1);
|
|
if (fchdir(fd) != 0) {
|
|
saved_errno = errno;
|
|
close(dotfd);
|
|
errno = saved_errno;
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
retval = open(path, flags, mode);
|
|
|
|
if (dotfd != -1) {
|
|
if (fchdir(dotfd) != 0) {
|
|
saved_errno = errno;
|
|
close(retval);
|
|
close(dotfd);
|
|
errno = saved_errno;
|
|
return (-1);
|
|
}
|
|
close(dotfd);
|
|
}
|
|
|
|
return (retval);
|
|
}
|