void blkid__scan_dir(char *dirname, dev_t devno, struct dir_list **list,
char **devname)
{
DIR *dir;
struct dirent *dp;
struct stat st;
if ((dir = opendir(dirname)) == NULL)
return;
while ((dp = readdir(dir)) != NULL) {
#ifdef _DIRENT_HAVE_D_TYPE
if (dp->d_type != DT_UNKNOWN && dp->d_type != DT_BLK &&
dp->d_type != DT_LNK && dp->d_type != DT_DIR)
continue;
#endif
if (dp->d_name[0] == '.' &&
((dp->d_name[1] == 0) ||
((dp->d_name[1] == '.') && (dp->d_name[2] == 0))))
continue;
if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 0))
continue;
if (S_ISBLK(st.st_mode) && st.st_rdev == devno) {
*devname = blkid_strconcat(dirname, "/", dp->d_name);
DBG(DEBUG_DEVNO,
printf("found 0x%llx at %s\n", (long long)devno,
*devname));
break;
}
if (!list || !S_ISDIR(st.st_mode))
continue;
/* add subdirectory (but not symlink) to the list */
#ifdef _DIRENT_HAVE_D_TYPE
if (dp->d_type == DT_LNK)
continue;
if (dp->d_type == DT_UNKNOWN)
#endif
{
if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 1) ||
!S_ISDIR(st.st_mode))
continue; /* symlink or lstat() failed */
}
if (*dp->d_name == '.' || (
#ifdef _DIRENT_HAVE_D_TYPE
dp->d_type == DT_DIR &&
#endif
strcmp(dp->d_name, "shm") == 0))
/* ignore /dev/.{udev,mount,mdadm} and /dev/shm */
continue;
add_to_dirlist(dirname, dp->d_name, list);
}
closedir(dir);
return;
}
int sysfs_stat(struct sysfs_cxt *cxt, const char *attr, struct stat *st)
{
int rc = fstat_at(cxt->dir_fd, cxt->dir_path, attr, st, 0);
if (rc != 0 && errno == ENOENT &&
strncmp(attr, "queue/", 6) == 0 && cxt->parent) {
/* Exception for "queue/<attr>". These attributes are available
* for parental devices only
*/
return fstat_at(cxt->parent->dir_fd,
cxt->parent->dir_path, attr, st, 0);
}
return rc;
}
static int mnt_table_parse_dir(struct libmnt_table *tb, const char *dirname)
{
int n = 0, i;
DIR *dir = NULL;
struct dirent **namelist = NULL;
/* TODO: it would be nice to have a scandir() implementation that
* is able to use already opened directory */
n = scandir(dirname, &namelist, NULL, versionsort);
if (n <= 0)
return 0;
/* let use "at" functions rather than play crazy games with paths... */
dir = opendir(dirname);
if (!dir)
return -errno;
for (i = 0; i < n; i++) {
struct dirent *d = namelist[i];
struct stat st;
size_t namesz;
FILE *f;
#ifdef _DIRENT_HAVE_D_TYPE
if (d->d_type != DT_UNKNOWN && d->d_type != DT_REG &&
d->d_type != DT_LNK)
continue;
#endif
if (*d->d_name == '.')
continue;
#define MNT_MNTTABDIR_EXTSIZ (sizeof(MNT_MNTTABDIR_EXT) - 1)
namesz = strlen(d->d_name);
if (!namesz || namesz < MNT_MNTTABDIR_EXTSIZ + 1 ||
strcmp(d->d_name + (namesz - MNT_MNTTABDIR_EXTSIZ),
MNT_MNTTABDIR_EXT))
continue;
if (fstat_at(dirfd(dir), _PATH_MNTTAB_DIR, d->d_name, &st, 0) ||
!S_ISREG(st.st_mode))
continue;
f = fopen_at(dirfd(dir), _PATH_MNTTAB_DIR,
d->d_name, O_RDONLY, "r");
if (f) {
mnt_table_parse_stream(tb, f, d->d_name);
fclose(f);
}
}
for (i = 0; i < n; i++)
free(namelist[i]);
free(namelist);
if (dir)
closedir(dir);
return 0;
}
static int __mnt_table_parse_dir(struct libmnt_table *tb, const char *dirname)
{
int n = 0, i, r = 0;
DIR *dir = NULL;
struct dirent **namelist = NULL;
n = scandir(dirname, &namelist, mnt_table_parse_dir_filter, versionsort);
if (n <= 0)
return 0;
/* let use "at" functions rather than play crazy games with paths... */
dir = opendir(dirname);
if (!dir) {
r = -errno;
goto out;
}
for (i = 0; i < n; i++) {
struct dirent *d = namelist[i];
struct stat st;
FILE *f;
if (fstat_at(dirfd(dir), _PATH_MNTTAB_DIR, d->d_name, &st, 0) ||
!S_ISREG(st.st_mode))
continue;
f = fopen_at(dirfd(dir), _PATH_MNTTAB_DIR,
d->d_name, O_RDONLY, "r");
if (f) {
mnt_table_parse_stream(tb, f, d->d_name);
fclose(f);
}
}
out:
for (i = 0; i < n; i++)
free(namelist[i]);
free(namelist);
if (dir)
closedir(dir);
return r;
}
static int __mnt_table_parse_dir(struct libmnt_table *tb, const char *dirname)
{
int n = 0, i;
int dd;
struct dirent **namelist = NULL;
dd = open(dirname, O_RDONLY|O_CLOEXEC|O_DIRECTORY);
if (dd < 0)
return -errno;
n = scandirat(dd, ".", &namelist, mnt_table_parse_dir_filter, versionsort);
if (n <= 0) {
close(dd);
return 0;
}
for (i = 0; i < n; i++) {
struct dirent *d = namelist[i];
struct stat st;
FILE *f;
if (fstat_at(dd, ".", d->d_name, &st, 0) ||
!S_ISREG(st.st_mode))
continue;
f = fopen_at(dd, ".", d->d_name, O_RDONLY, "r");
if (f) {
mnt_table_parse_stream(tb, f, d->d_name);
fclose(f);
}
}
for (i = 0; i < n; i++)
free(namelist[i]);
free(namelist);
close(dd);
return 0;
}
int proc_next_pid(struct proc_processes *ps, pid_t *pid)
{
struct dirent *d;
if (!ps || !pid)
return -EINVAL;
*pid = 0;
errno = 0;
do {
char buf[BUFSIZ], *p;
d = readdir(ps->dir);
if (!d)
return errno ? -1 : 1; /* error or end-of-dir */
if (!isdigit((unsigned char) *d->d_name))
continue;
/* filter out by UID */
if (ps->has_fltr_uid) {
struct stat st;
if (fstat_at(dirfd(ps->dir), "/proc", d->d_name, &st, 0))
continue;
if (ps->fltr_uid != st.st_uid)
continue;
}
/* filter out by NAME */
if (ps->has_fltr_name) {
char procname[256];
FILE *f;
snprintf(buf, sizeof(buf), "%s/stat", d->d_name);
f = fopen_at(dirfd(ps->dir), "/proc", buf,
O_CLOEXEC|O_RDONLY, "r");
if (!f)
continue;
p = fgets(buf, sizeof(buf), f);
fclose(f);
if (sscanf(buf, "%*d (%255[^)])", procname) != 1)
continue;
/* ok, we got the process name. */
if (strcmp(procname, ps->fltr_name) != 0)
continue;
}
p = NULL;
errno = 0;
*pid = (pid_t) strtol(d->d_name, &p, 10);
if (errno || d->d_name == p || (p && *p))
return errno ? -errno : -1;
return 0;
} while (1);
return 0;
}