diff options
Diffstat (limited to 'libbb/change_identity.c')
-rw-r--r-- | libbb/change_identity.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libbb/change_identity.c b/libbb/change_identity.c new file mode 100644 index 000000000..3f888f523 --- /dev/null +++ b/libbb/change_identity.c | |||
@@ -0,0 +1,51 @@ | |||
1 | /* vi: set sw=4 ts=4: */ | ||
2 | /* | ||
3 | * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com> | ||
4 | * All rights reserved. | ||
5 | * | ||
6 | * Redistribution and use in source and binary forms, with or without | ||
7 | * modification, are permitted provided that the following conditions | ||
8 | * are met: | ||
9 | * 1. Redistributions of source code must retain the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer. | ||
11 | * 2. Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * 3. Neither the name of Julianne F. Haugh nor the names of its contributors | ||
15 | * may be used to endorse or promote products derived from this software | ||
16 | * without specific prior written permission. | ||
17 | * | ||
18 | * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND | ||
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
21 | * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE | ||
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
28 | * SUCH DAMAGE. | ||
29 | */ | ||
30 | |||
31 | #include "libbb.h" | ||
32 | |||
33 | |||
34 | /* Become the user and group(s) specified by PW. */ | ||
35 | const char *change_identity_e2str(const struct passwd *pw) | ||
36 | { | ||
37 | if (initgroups(pw->pw_name, pw->pw_gid) == -1) | ||
38 | return "cannot set groups"; | ||
39 | endgrent(); /* ?? */ | ||
40 | xsetgid(pw->pw_gid); | ||
41 | xsetuid(pw->pw_uid); | ||
42 | return NULL; | ||
43 | } | ||
44 | |||
45 | void change_identity(const struct passwd *pw) | ||
46 | { | ||
47 | const char *err_msg = change_identity_e2str(pw); | ||
48 | |||
49 | if (err_msg) | ||
50 | bb_perror_msg_and_die("%s", err_msg); | ||
51 | } | ||