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/*
* Copyright (c) 2008-2010, 2013 Wind River Systems; see
* guts/COPYRIGHT for information.
*
* static int
* wrap_openat(int dirfd, const char *path, int flags, ...mode_t mode) {
* int rc = -1;
*/
struct stat64 buf;
int existed = 1;
int save_errno;
#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
if (dirfd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
#endif
#ifdef PSEUDO_FORCE_ASYNCH
/* Yes, I'm aware that every Linux system I've seen has
* DSYNC and RSYNC being the same value as SYNC.
*/
flags &= ~(O_SYNC
#ifdef O_DIRECT
| O_DIRECT
#endif
#ifdef O_DSYNC
| O_DSYNC
#endif
#ifdef O_RSYNC
| O_RSYNC
#endif
);
#endif
/* if a creation has been requested, check whether file exists */
if (flags & O_CREAT) {
save_errno = errno;
#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
rc = real___xstat64(_STAT_VER, path, &buf);
#else
rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, 0);
#endif
existed = (rc != -1);
if (!existed)
pseudo_debug(2, "openat_creat: %s -> 0%o\n", path, mode);
errno = save_errno;
}
/* because we are not actually root, secretly mask in 0600 to the
* underlying mode. The ", 0" is because the only time mode matters
* is if a file is going to be created, in which case it's
* not a directory.
*/
#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
rc = real_open(path, flags, PSEUDO_FS_MODE(mode, 0));
#else
rc = real_openat(dirfd, path, flags, PSEUDO_FS_MODE(mode, 0));
#endif
save_errno = errno;
if (rc != -1) {
int stat_rc;
#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
stat_rc = real___xstat64(_STAT_VER, path, &buf);
#else
stat_rc = real___fxstatat64(_STAT_VER, dirfd, path, &buf, 0);
#endif
if (stat_rc != -1) {
buf.st_mode = PSEUDO_DB_MODE(buf.st_mode, mode);
if (!existed) {
pseudo_client_op(OP_CREAT, 0, -1, dirfd, path, &buf);
}
pseudo_client_op(OP_OPEN, PSEUDO_ACCESS(flags), rc, dirfd, path, &buf);
} else {
pseudo_debug(1, "openat (fd %d, path %d/%s, flags %d) succeeded, but stat failed (%s).\n",
rc, dirfd, path, flags, strerror(errno));
pseudo_client_op(OP_OPEN, PSEUDO_ACCESS(flags), rc, dirfd, path, 0);
}
errno = save_errno;
}
/* return rc;
* }
*/
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