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/*
* Copyright (c) 2020 Christian Weisgerber <naddy@FreeBSD.org>
*
* 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 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>
/*
* POSIX mandates that open(symlink, O_NOFOLLOW) fail with errno == ELOOP.
* FreeBSD chooses to deviate from this, but Got depends on it.
*/
int
open_posix(const char *path, int flags, ...)
{
va_list ap;
mode_t mode;
int ret;
if (flags & O_CREAT) {
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
ret = open(path, flags, mode);
} else
ret = open(path, flags);
if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
errno = ELOOP;
return (ret);
}
int
openat_posix(int fd, const char *path, int flags, ...)
{
va_list ap;
mode_t mode;
int ret;
if (flags & O_CREAT) {
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
ret = openat(fd, path, flags, mode);
} else
ret = openat(fd, path, flags);
if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
errno = ELOOP;
return (ret);
}
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