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/*
* Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include "udev.h"
int create_path(struct udev *udev, const char *path)
{
char p[UTIL_PATH_SIZE];
char *pos;
struct stat stats;
int ret;
util_strlcpy(p, path, sizeof(p));
pos = strrchr(p, '/');
if (pos == p || pos == NULL)
return 0;
while (pos[-1] == '/')
pos--;
pos[0] = '\0';
dbg(udev, "stat '%s'\n", p);
if (stat(p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
return 0;
if (create_path(udev, p) != 0)
return -1;
dbg(udev, "mkdir '%s'\n", p);
udev_selinux_setfscreatecon(udev, p, S_IFDIR|0755);
ret = mkdir(p, 0755);
udev_selinux_resetfscreatecon(udev);
if (ret == 0)
return 0;
if (errno == EEXIST)
if (stat(p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
return 0;
return -1;
}
int delete_path(struct udev *udev, const char *path)
{
char p[UTIL_PATH_SIZE];
char *pos;
int retval;
strcpy (p, path);
pos = strrchr(p, '/');
if (pos == p || pos == NULL)
return 0;
while (1) {
*pos = '\0';
pos = strrchr(p, '/');
/* don't remove the last one */
if ((pos == p) || (pos == NULL))
break;
/* remove if empty */
retval = rmdir(p);
if (errno == ENOENT)
retval = 0;
if (retval) {
if (errno == ENOTEMPTY)
return 0;
err(udev, "rmdir(%s) failed: %m\n", p);
break;
}
dbg(udev, "removed '%s'\n", p);
}
return 0;
}
/* Reset permissions on the device node, before unlinking it to make sure,
* that permisions of possible hard links will be removed too.
*/
int unlink_secure(struct udev *udev, const char *filename)
{
int retval;
retval = chown(filename, 0, 0);
if (retval)
err(udev, "chown(%s, 0, 0) failed: %m\n", filename);
retval = chmod(filename, 0000);
if (retval)
err(udev, "chmod(%s, 0000) failed: %m\n", filename);
retval = unlink(filename);
if (errno == ENOENT)
retval = 0;
if (retval)
err(udev, "unlink(%s) failed: %m\n", filename);
return retval;
}
uid_t lookup_user(struct udev *udev, const char *user)
{
struct passwd *pw;
uid_t uid = 0;
errno = 0;
pw = getpwnam(user);
if (pw == NULL) {
if (errno == 0 || errno == ENOENT || errno == ESRCH)
err(udev, "specified user '%s' unknown\n", user);
else
err(udev, "error resolving user '%s': %m\n", user);
} else
uid = pw->pw_uid;
return uid;
}
extern gid_t lookup_group(struct udev *udev, const char *group)
{
struct group *gr;
gid_t gid = 0;
errno = 0;
gr = getgrnam(group);
if (gr == NULL) {
if (errno == 0 || errno == ENOENT || errno == ESRCH)
err(udev, "specified group '%s' unknown\n", group);
else
err(udev, "error resolving group '%s': %m\n", group);
} else
gid = gr->gr_gid;
return gid;
}
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