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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009-2020 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <limits.h>
#include <sys/stat.h>
#include "c-ctype.h"
#include "daemon.h"
#include "actions.h"
#define GUESTFSDIR "/dev/disk/guestfs"
char **
do_list_disk_labels (void)
{
DIR *dir = NULL;
struct dirent *d;
CLEANUP_FREE_STRINGSBUF DECLARE_STRINGSBUF (ret);
dir = opendir (GUESTFSDIR);
if (!dir) {
if (errno == ENOENT) {
/* The directory does not exist, and usually this happens when
* there are no labels set. In this case, act as if the directory
* was empty.
*/
return empty_list ();
}
reply_with_perror ("opendir: %s", GUESTFSDIR);
return NULL;
}
errno = 0;
while ((d = readdir (dir)) != NULL) {
CLEANUP_FREE char *path = NULL;
char *rawdev;
if (d->d_name[0] == '.')
continue;
if (asprintf (&path, "%s/%s", GUESTFSDIR, d->d_name) == -1) {
reply_with_perror ("asprintf");
goto error;
}
rawdev = realpath (path, NULL);
if (rawdev == NULL) {
reply_with_perror ("realpath: %s", path);
goto error;
}
if (add_string (&ret, d->d_name) == -1) {
free (rawdev);
goto error;
}
if (add_string_nodup (&ret, rawdev) == -1)
goto error;
}
/* Check readdir didn't fail */
if (errno != 0) {
reply_with_perror ("readdir: %s", GUESTFSDIR);
goto error;
}
/* Close the directory handle */
if (closedir (dir) == -1) {
reply_with_perror ("closedir: %s", GUESTFSDIR);
dir = NULL;
goto error;
}
dir = NULL;
if (end_stringsbuf (&ret) == -1)
goto error;
return take_stringsbuf (&ret); /* caller frees */
error:
if (dir)
closedir (dir);
return NULL;
}
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