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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 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 <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
GUESTFSD_EXT_CMD(str_rm, rm);
int
do_rmdir (const char *path)
{
int r;
CHROOT_IN;
r = rmdir (path);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
return 0;
}
/* This implementation is quick and dirty, and allows people to try
* to remove parts of the initramfs (eg. "rm -r /..") but if people
* do stupid stuff, who are we to try to stop them?
*/
int
do_rm_rf (const char *path)
{
int r;
char *buf, *err;
if (STREQ (path, "/")) {
reply_with_error ("cannot remove root directory");
return -1;
}
buf = sysroot_path (path);
if (buf == NULL) {
reply_with_perror ("malloc");
return -1;
}
r = command (NULL, &err, str_rm, "-rf", buf, NULL);
free (buf);
/* rm -rf is never supposed to fail. I/O errors perhaps? */
if (r == -1) {
reply_with_error ("%s: %s", path, err);
free (err);
return -1;
}
free (err);
return 0;
}
int
do_mkdir (const char *path)
{
int r;
CHROOT_IN;
r = mkdir (path, 0777);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
return 0;
}
int
do_mkdir_mode (const char *path, int mode)
{
int r;
if (mode < 0) {
reply_with_error ("%s: mode is negative", path);
return -1;
}
CHROOT_IN;
r = mkdir (path, mode);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
return 0;
}
/* Returns:
* 0 if everything was OK,
* -1 for a general error (sets errno),
* -2 if an existing path element was not a directory.
*/
static int
recursive_mkdir (const char *path)
{
int loop = 0;
int r;
char *ppath, *p;
struct stat buf;
again:
r = mkdir (path, 0777);
if (r == -1) {
if (errno == EEXIST) { /* Something exists here, might not be a dir. */
r = lstat (path, &buf);
if (r == -1) return -1;
if (!S_ISDIR (buf.st_mode)) return -2;
return 0; /* OK - directory exists here already. */
}
if (!loop && errno == ENOENT) {
loop = 1; /* Stops it looping forever. */
/* If we're at the root, and we failed, just give up. */
if (path[0] == '/' && path[1] == '\0') return -1;
/* Try to make the parent directory first. */
ppath = strdup (path);
if (ppath == NULL) return -1;
p = strrchr (ppath, '/');
if (p) *p = '\0';
r = recursive_mkdir (ppath);
free (ppath);
if (r != 0) return r;
goto again;
} else /* Failed for some other reason, so return error. */
return -1;
}
return 0;
}
int
do_mkdir_p (const char *path)
{
int r;
CHROOT_IN;
r = recursive_mkdir (path);
CHROOT_OUT;
if (r == -1) {
reply_with_perror ("%s", path);
return -1;
}
if (r == -2) {
reply_with_error ("%s: a path element was not a directory", path);
return -1;
}
return 0;
}
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