Annotation of /tags/mkinitrd-6_2_0/libpwdgrp/uidgid_get.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/libpwdgrp/uidgid_get.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/libpwdgrp/uidgid_get.c
File MIME type: text/plain
File size: 2861 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 | niro | 532 | /* |
2 | Copyright (c) 2001-2006, Gerrit Pape | ||
3 | All rights reserved. | ||
4 | |||
5 | Redistribution and use in source and binary forms, with or without | ||
6 | modification, are permitted provided that the following conditions are met: | ||
7 | |||
8 | 1. Redistributions of source code must retain the above copyright notice, | ||
9 | this list of conditions and the following disclaimer. | ||
10 | 2. Redistributions in binary form must reproduce the above copyright | ||
11 | notice, this list of conditions and the following disclaimer in the | ||
12 | documentation and/or other materials provided with the distribution. | ||
13 | 3. The name of the author may not be used to endorse or promote products | ||
14 | derived from this software without specific prior written permission. | ||
15 | |||
16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | ||
17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
18 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | ||
19 | EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
20 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | ||
22 | OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
23 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | ||
24 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | ||
25 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
26 | */ | ||
27 | |||
28 | #include "busybox.h" | ||
29 | |||
30 | int get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok) | ||
31 | { | ||
32 | struct passwd *pwd; | ||
33 | struct group *gr; | ||
34 | char *user, *group; | ||
35 | unsigned n; | ||
36 | |||
37 | user = (char*)ug; | ||
38 | group = strchr(ug, ':'); | ||
39 | if (group) { | ||
40 | int sz = (++group) - ug; | ||
41 | user = alloca(sz); | ||
42 | /* copies sz-1 bytes, stores terminating '\0' */ | ||
43 | safe_strncpy(user, ug, sz); | ||
44 | } | ||
45 | if (numeric_ok) { | ||
46 | n = bb_strtou(user, NULL, 10); | ||
47 | if (!errno) { | ||
48 | u->uid = n; | ||
49 | pwd = getpwuid(n); | ||
50 | /* If we have e.g. "500" string without user */ | ||
51 | /* with uid 500 in /etc/passwd, we set gid == uid */ | ||
52 | u->gid = pwd ? pwd->pw_gid : n; | ||
53 | goto skip; | ||
54 | } | ||
55 | } | ||
56 | pwd = getpwnam(user); | ||
57 | if (!pwd) | ||
58 | return 0; | ||
59 | u->uid = pwd->pw_uid; | ||
60 | u->gid = pwd->pw_gid; | ||
61 | |||
62 | skip: | ||
63 | if (group) { | ||
64 | if (numeric_ok) { | ||
65 | n = bb_strtou(group, NULL, 10); | ||
66 | if (!errno) { | ||
67 | u->gid = n; | ||
68 | return 1; | ||
69 | } | ||
70 | } | ||
71 | gr = getgrnam(group); | ||
72 | if (!gr) return 0; | ||
73 | u->gid = gr->gr_gid; | ||
74 | } | ||
75 | return 1; | ||
76 | } | ||
77 | |||
78 | #if 0 | ||
79 | #include <stdio.h> | ||
80 | int main() | ||
81 | { | ||
82 | unsigned u; | ||
83 | struct bb_uidgid_t ug; | ||
84 | u = get_uidgid(&ug, "apache", 0); | ||
85 | printf("%u = %u:%u\n", u, ug.uid, ug.gid); | ||
86 | ug.uid = ug.gid = 1111; | ||
87 | u = get_uidgid(&ug, "apache", 0); | ||
88 | printf("%u = %u:%u\n", u, ug.uid, ug.gid); | ||
89 | ug.uid = ug.gid = 1111; | ||
90 | u = get_uidgid(&ug, "apache:users", 0); | ||
91 | printf("%u = %u:%u\n", u, ug.uid, ug.gid); | ||
92 | ug.uid = ug.gid = 1111; | ||
93 | u = get_uidgid(&ug, "apache:users", 0); | ||
94 | printf("%u = %u:%u\n", u, ug.uid, ug.gid); | ||
95 | return 0; | ||
96 | } | ||
97 | #endif |