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 fatal(0, "cannot find user %s", config->user);
46 if(pw->pw_uid != getuid()) {
47 if(initgroups(config->user, pw->pw_gid))
48 fatal(errno, "error calling initgroups");
49 if(setgid(pw->pw_gid) < 0) fatal(errno, "error calling setgid");
50 if(setuid(pw->pw_uid) < 0) fatal(errno, "error calling setgid");
51 info("changed to user %s (uid %lu)", config->user, (unsigned long)getuid());
54 if(getuid() != pw->pw_uid) fatal(0, "wrong real uid");
55 if(geteuid() != pw->pw_uid) fatal(0, "wrong effective uid");
56 if(getgid() != pw->pw_gid) fatal(0, "wrong real gid");
57 if(getegid() != pw->pw_gid) fatal(0, "wrong effective gid");
58 if(setuid(0) != -1) fatal(0, "setuid(0) unexpectedly succeeded");
59 if(seteuid(0) != -1) fatal(0, "seteuid(0) unexpectedly succeeded");
63 /** @brief Create the jukebox state directory
65 * If the home directory does not exist then creates it and assigns
66 * it suitable permissions.
68 void make_home(void) {
73 if(stat(config->home, &sb) < 0) {
74 /* create parent directories */
75 home = xstrdup(config->home);
78 if(*p == '/' && p > home) {
85 /* create the directory itself */
86 if(mkdir(config->home, 02755) < 0)
87 fatal(errno, "error creating %s", config->home);
88 /* make sure it has the right ownership */
90 if(!(pw = getpwnam(config->user)))
91 fatal(0, "cannot find user %s", config->user);
92 if(chown(config->home, pw->pw_uid, pw->pw_gid) < 0)
93 fatal(errno, "error chowning %s", config->home);