ec70b956fd
These functions will need custom implementations on Darwin. Since the implementation is very similar among all of them, and 9p-util already has the _nofollow version of fgetxattrat, let's move them all there. Signed-off-by: Keno Fischer <keno@juliacomputing.com> Signed-off-by: Greg Kurz <groug@kaod.org>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
|
|
* 9p utilities
|
|
*
|
|
* Copyright IBM, Corp. 2017
|
|
*
|
|
* Authors:
|
|
* Greg Kurz <groug@kaod.org>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef QEMU_9P_UTIL_H
|
|
#define QEMU_9P_UTIL_H
|
|
|
|
#ifdef O_PATH
|
|
#define O_PATH_9P_UTIL O_PATH
|
|
#else
|
|
#define O_PATH_9P_UTIL 0
|
|
#endif
|
|
|
|
static inline void close_preserve_errno(int fd)
|
|
{
|
|
int serrno = errno;
|
|
close(fd);
|
|
errno = serrno;
|
|
}
|
|
|
|
static inline int openat_dir(int dirfd, const char *name)
|
|
{
|
|
return openat(dirfd, name,
|
|
O_DIRECTORY | O_RDONLY | O_NOFOLLOW | O_PATH_9P_UTIL);
|
|
}
|
|
|
|
static inline int openat_file(int dirfd, const char *name, int flags,
|
|
mode_t mode)
|
|
{
|
|
int fd, serrno, ret;
|
|
|
|
fd = openat(dirfd, name, flags | O_NOFOLLOW | O_NOCTTY | O_NONBLOCK,
|
|
mode);
|
|
if (fd == -1) {
|
|
return -1;
|
|
}
|
|
|
|
serrno = errno;
|
|
/* O_NONBLOCK was only needed to open the file. Let's drop it. We don't
|
|
* do that with O_PATH since fcntl(F_SETFL) isn't supported, and openat()
|
|
* ignored it anyway.
|
|
*/
|
|
if (!(flags & O_PATH_9P_UTIL)) {
|
|
ret = fcntl(fd, F_SETFL, flags);
|
|
assert(!ret);
|
|
}
|
|
errno = serrno;
|
|
return fd;
|
|
}
|
|
|
|
ssize_t fgetxattrat_nofollow(int dirfd, const char *path, const char *name,
|
|
void *value, size_t size);
|
|
int fsetxattrat_nofollow(int dirfd, const char *path, const char *name,
|
|
void *value, size_t size, int flags);
|
|
ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
|
|
char *list, size_t size);
|
|
ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
|
|
const char *name);
|
|
|
|
#endif
|