Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
659d87e8 | 3 | * Copyright (C) 2005, 2007 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
9 | * |
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. | |
14 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
659d87e8 RK |
18 | /** @file lib/user.c |
19 | * @brief Jukebox user management | |
20 | */ | |
460b9539 | 21 | |
05b75f8d | 22 | #include "common.h" |
460b9539 | 23 | |
24 | #include <sys/types.h> | |
659d87e8 | 25 | #include <sys/stat.h> |
460b9539 | 26 | #include <errno.h> |
27 | #include <pwd.h> | |
28 | #include <grp.h> | |
29 | #include <unistd.h> | |
30 | ||
31 | #include "user.h" | |
32 | #include "log.h" | |
33 | #include "configuration.h" | |
659d87e8 | 34 | #include "mem.h" |
460b9539 | 35 | |
659d87e8 RK |
36 | /** @brief Become the jukebox user |
37 | * | |
38 | * If a jukebox user is configured then becomes that user. | |
39 | */ | |
460b9539 | 40 | void become_mortal(void) { |
41 | struct passwd *pw; | |
42 | ||
43 | if(config->user) { | |
44 | if(!(pw = getpwnam(config->user))) | |
2e9ba080 | 45 | disorder_fatal(0, "cannot find user %s", config->user); |
460b9539 | 46 | if(pw->pw_uid != getuid()) { |
e5af9e8d RK |
47 | disorder_info("becoming user %u group %u", |
48 | (unsigned)pw->pw_uid, | |
49 | (unsigned)pw->pw_gid); | |
460b9539 | 50 | if(initgroups(config->user, pw->pw_gid)) |
2e9ba080 RK |
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()); | |
460b9539 | 58 | } |
59 | /* sanity checks */ | |
2e9ba080 RK |
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"); | |
68 | if(setuid(0) != -1) | |
69 | disorder_fatal(0, "setuid(0) unexpectedly succeeded"); | |
70 | if(seteuid(0) != -1) | |
71 | disorder_fatal(0, "seteuid(0) unexpectedly succeeded"); | |
460b9539 | 72 | } |
73 | } | |
74 | ||
659d87e8 RK |
75 | /** @brief Create the jukebox state directory |
76 | * | |
77 | * If the home directory does not exist then creates it and assigns | |
78 | * it suitable permissions. | |
79 | */ | |
80 | void make_home(void) { | |
81 | struct stat sb; | |
82 | struct passwd *pw; | |
83 | char *home, *p; | |
84 | ||
85 | if(stat(config->home, &sb) < 0) { | |
86 | /* create parent directories */ | |
87 | home = xstrdup(config->home); | |
88 | p = home; | |
89 | while(*p) { | |
90 | if(*p == '/' && p > home) { | |
91 | *p = 0; | |
92 | mkdir(home, 0755); | |
93 | *p = '/'; | |
94 | } | |
95 | ++p; | |
96 | } | |
97 | /* create the directory itself */ | |
98 | if(mkdir(config->home, 02755) < 0) | |
2e9ba080 | 99 | disorder_fatal(errno, "error creating %s", config->home); |
659d87e8 RK |
100 | /* make sure it has the right ownership */ |
101 | if(config->user) { | |
102 | if(!(pw = getpwnam(config->user))) | |
2e9ba080 | 103 | disorder_fatal(0, "cannot find user %s", config->user); |
659d87e8 | 104 | if(chown(config->home, pw->pw_uid, pw->pw_gid) < 0) |
2e9ba080 | 105 | disorder_fatal(errno, "error chowning %s", config->home); |
659d87e8 RK |
106 | } |
107 | } | |
108 | } | |
109 | ||
460b9539 | 110 | /* |
111 | Local Variables: | |
112 | c-basic-offset:2 | |
113 | comment-column:40 | |
114 | fill-column:79 | |
115 | indent-tabs-mode:nil | |
116 | End: | |
117 | */ |