2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2007 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * @brief Jukebox user management
24 #include <sys/types.h>
33 #include "configuration.h"
36 /** @brief Become the jukebox user
38 * If a jukebox user is configured then becomes that user.
40 void become_mortal(void) {
44 if(!(pw = getpwnam(config->user)))
45 disorder_fatal(0, "cannot find user %s", config->user);
46 if(pw->pw_uid != getuid()) {
47 disorder_info("becoming user %u group %u",
49 (unsigned)pw->pw_gid);
50 if(initgroups(config->user, pw->pw_gid))
51 disorder_fatal(errno, "error calling initgroups");
52 if(setgid(pw->pw_gid) < 0)
53 disorder_fatal(errno, "error calling setgid");
54 if(setuid(pw->pw_uid) < 0)
55 disorder_fatal(errno, "error calling setgid");
56 disorder_info("changed to user %s (uid %lu)",
57 config->user, (unsigned long)getuid());
60 if(getuid() != pw->pw_uid)
61 disorder_fatal(0, "wrong real uid");
62 if(geteuid() != pw->pw_uid)
63 disorder_fatal(0, "wrong effective uid");
64 if(getgid() != pw->pw_gid)
65 disorder_fatal(0, "wrong real gid");
66 if(getegid() != pw->pw_gid)
67 disorder_fatal(0, "wrong effective gid");
69 disorder_fatal(0, "setuid(0) unexpectedly succeeded");
71 disorder_fatal(0, "seteuid(0) unexpectedly succeeded");
75 /** @brief Create the jukebox state directory
77 * If the home directory does not exist then creates it and assigns
78 * it suitable permissions.
80 void make_home(void) {
85 if(stat(config->home, &sb) < 0) {
86 /* create parent directories */
87 home = xstrdup(config->home);
90 if(*p == '/' && p > home) {
97 /* create the directory itself */
98 if(mkdir(config->home, 02755) < 0)
99 disorder_fatal(errno, "error creating %s", config->home);
100 /* make sure it has the right ownership */
102 if(!(pw = getpwnam(config->user)))
103 disorder_fatal(0, "cannot find user %s", config->user);
104 if(chown(config->home, pw->pw_uid, pw->pw_gid) < 0)
105 disorder_fatal(errno, "error chowning %s", config->home);