Contents of /trunk/mkinitrd-magellan/busybox/loginutils/addgroup.c
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 2473 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * addgroup - add users to /etc/passwd and /etc/shadow |
4 | * |
5 | * Copyright (C) 1999 by Lineo, inc. and John Beppu |
6 | * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org> |
7 | * |
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
9 | * |
10 | */ |
11 | |
12 | #include "busybox.h" |
13 | |
14 | /* make sure gr_name isn't taken, make sure gid is kosher |
15 | * return 1 on failure */ |
16 | static int group_study(struct group *g) |
17 | { |
18 | FILE *etc_group; |
19 | gid_t desired; |
20 | |
21 | struct group *grp; |
22 | const int max = 65000; |
23 | |
24 | etc_group = xfopen(bb_path_group_file, "r"); |
25 | |
26 | /* make sure gr_name isn't taken, make sure gid is kosher */ |
27 | desired = g->gr_gid; |
28 | while ((grp = fgetgrent(etc_group))) { |
29 | if ((strcmp(grp->gr_name, g->gr_name)) == 0) { |
30 | bb_error_msg_and_die("%s: group already in use", g->gr_name); |
31 | } |
32 | if ((desired) && grp->gr_gid == desired) { |
33 | bb_error_msg_and_die("%d: gid already in use", |
34 | desired); |
35 | } |
36 | if ((grp->gr_gid > g->gr_gid) && (grp->gr_gid < max)) { |
37 | g->gr_gid = grp->gr_gid; |
38 | } |
39 | } |
40 | fclose(etc_group); |
41 | |
42 | /* gid */ |
43 | if (desired) { |
44 | g->gr_gid = desired; |
45 | } else { |
46 | g->gr_gid++; |
47 | } |
48 | /* return 1; */ |
49 | return 0; |
50 | } |
51 | |
52 | /* append a new user to the passwd file */ |
53 | static int addgroup(char *group, gid_t gid, const char *user) |
54 | { |
55 | FILE *file; |
56 | struct group gr; |
57 | |
58 | /* make sure gid and group haven't already been allocated */ |
59 | gr.gr_gid = gid; |
60 | gr.gr_name = group; |
61 | if (group_study(&gr)) |
62 | return 1; |
63 | |
64 | /* add entry to group */ |
65 | file = xfopen(bb_path_group_file, "a"); |
66 | /* group:passwd:gid:userlist */ |
67 | fprintf(file, "%s:%s:%d:%s\n", group, "x", gr.gr_gid, user); |
68 | fclose(file); |
69 | |
70 | #if ENABLE_FEATURE_SHADOWPASSWDS |
71 | file = xfopen(bb_path_gshadow_file, "a"); |
72 | fprintf(file, "%s:!::\n", group); |
73 | fclose(file); |
74 | #endif |
75 | |
76 | /* return 1; */ |
77 | return 0; |
78 | } |
79 | |
80 | /* |
81 | * addgroup will take a login_name as its first parameter. |
82 | * |
83 | * gid |
84 | * |
85 | * can be customized via command-line parameters. |
86 | * ________________________________________________________________________ */ |
87 | int addgroup_main(int argc, char **argv) |
88 | { |
89 | char *group; |
90 | gid_t gid = 0; |
91 | |
92 | /* check for min, max and missing args and exit on error */ |
93 | opt_complementary = "-1:?2:?"; |
94 | if (getopt32(argc, argv, "g:", &group)) { |
95 | gid = xatoul_range(group, 0, (gid_t)ULONG_MAX); |
96 | } |
97 | /* move past the commandline options */ |
98 | argv += optind; |
99 | |
100 | /* need to be root */ |
101 | if (geteuid()) { |
102 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); |
103 | } |
104 | |
105 | /* werk */ |
106 | return addgroup(argv[0], gid, (argv[1]) ? argv[1] : ""); |
107 | } |