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 | * |
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 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
659d87e8 RK |
20 | /** @file lib/user.c |
21 | * @brief Jukebox user management | |
22 | */ | |
460b9539 | 23 | |
24 | #include <config.h> | |
25 | #include "types.h" | |
26 | ||
27 | #include <sys/types.h> | |
659d87e8 | 28 | #include <sys/stat.h> |
460b9539 | 29 | #include <errno.h> |
30 | #include <pwd.h> | |
31 | #include <grp.h> | |
32 | #include <unistd.h> | |
33 | ||
34 | #include "user.h" | |
35 | #include "log.h" | |
36 | #include "configuration.h" | |
659d87e8 | 37 | #include "mem.h" |
460b9539 | 38 | |
659d87e8 RK |
39 | /** @brief Become the jukebox user |
40 | * | |
41 | * If a jukebox user is configured then becomes that user. | |
42 | */ | |
460b9539 | 43 | void become_mortal(void) { |
44 | struct passwd *pw; | |
45 | ||
46 | if(config->user) { | |
47 | if(!(pw = getpwnam(config->user))) | |
48 | fatal(0, "cannot find user %s", config->user); | |
49 | if(pw->pw_uid != getuid()) { | |
50 | if(initgroups(config->user, pw->pw_gid)) | |
51 | fatal(errno, "error calling initgroups"); | |
52 | if(setgid(pw->pw_gid) < 0) fatal(errno, "error calling setgid"); | |
53 | if(setuid(pw->pw_uid) < 0) fatal(errno, "error calling setgid"); | |
54 | info("changed to user %s (uid %lu)", config->user, (unsigned long)getuid()); | |
55 | } | |
56 | /* sanity checks */ | |
57 | if(getuid() != pw->pw_uid) fatal(0, "wrong real uid"); | |
58 | if(geteuid() != pw->pw_uid) fatal(0, "wrong effective uid"); | |
59 | if(getgid() != pw->pw_gid) fatal(0, "wrong real gid"); | |
60 | if(getegid() != pw->pw_gid) fatal(0, "wrong effective gid"); | |
61 | if(setuid(0) != -1) fatal(0, "setuid(0) unexpectedly succeeded"); | |
62 | if(seteuid(0) != -1) fatal(0, "seteuid(0) unexpectedly succeeded"); | |
63 | } | |
64 | } | |
65 | ||
659d87e8 RK |
66 | /** @brief Create the jukebox state directory |
67 | * | |
68 | * If the home directory does not exist then creates it and assigns | |
69 | * it suitable permissions. | |
70 | */ | |
71 | void make_home(void) { | |
72 | struct stat sb; | |
73 | struct passwd *pw; | |
74 | char *home, *p; | |
75 | ||
76 | if(stat(config->home, &sb) < 0) { | |
77 | /* create parent directories */ | |
78 | home = xstrdup(config->home); | |
79 | p = home; | |
80 | while(*p) { | |
81 | if(*p == '/' && p > home) { | |
82 | *p = 0; | |
83 | mkdir(home, 0755); | |
84 | *p = '/'; | |
85 | } | |
86 | ++p; | |
87 | } | |
88 | /* create the directory itself */ | |
89 | if(mkdir(config->home, 02755) < 0) | |
90 | fatal(errno, "error creating %s", config->home); | |
91 | /* make sure it has the right ownership */ | |
92 | if(config->user) { | |
93 | if(!(pw = getpwnam(config->user))) | |
94 | fatal(0, "cannot find user %s", config->user); | |
95 | if(chown(config->home, pw->pw_uid, pw->pw_gid) < 0) | |
96 | fatal(errno, "error chowning %s", config->home); | |
97 | } | |
98 | } | |
99 | } | |
100 | ||
460b9539 | 101 | /* |
102 | Local Variables: | |
103 | c-basic-offset:2 | |
104 | comment-column:40 | |
105 | fill-column:79 | |
106 | indent-tabs-mode:nil | |
107 | End: | |
108 | */ |