source: branches/3.0/mindi-busybox/loginutils/chpasswd.c @ 2899

Last change on this file since 2899 was 2725, checked in by bruno, 8 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
  • Property svn:eol-style set to native
File size: 1.9 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * chpasswd.c
4 *
5 * Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org>
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
7 */
8#include "libbb.h"
9
10#if ENABLE_LONG_OPTS
11static const char chpasswd_longopts[] ALIGN1 =
12    "encrypted\0" No_argument "e"
13    "md5\0"       No_argument "m"
14    ;
15#endif
16
17#define OPT_ENC  1
18#define OPT_MD5  2
19
20int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
21int chpasswd_main(int argc UNUSED_PARAM, char **argv)
22{
23    char *name, *pass;
24    char salt[sizeof("$N$XXXXXXXX")];
25    int opt, rc;
26    int rnd = rnd; /* we *want* it to be non-initialized! */
27
28    if (getuid())
29        bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
30
31    opt_complementary = "m--e:e--m";
32    IF_LONG_OPTS(applet_long_options = chpasswd_longopts;)
33    opt = getopt32(argv, "em");
34
35    while ((name = xmalloc_fgetline(stdin)) != NULL) {
36        pass = strchr(name, ':');
37        if (!pass)
38            bb_error_msg_and_die("missing new password");
39        *pass++ = '\0';
40
41        xuname2uid(name); /* dies if there is no such user */
42
43        if (!(opt & OPT_ENC)) {
44            rnd = crypt_make_salt(salt, 1, rnd);
45            if (opt & OPT_MD5) {
46                strcpy(salt, "$1$");
47                rnd = crypt_make_salt(salt + 3, 4, rnd);
48            }
49            pass = pw_encrypt(pass, salt, 0);
50        }
51
52        /* This is rather complex: if user is not found in /etc/shadow,
53         * we try to find & change his passwd in /etc/passwd */
54#if ENABLE_FEATURE_SHADOWPASSWDS
55        rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
56        if (rc == 0) /* no lines updated, no errors detected */
57#endif
58            rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
59        /* LOGMODE_BOTH logs to syslog also */
60        logmode = LOGMODE_BOTH;
61        if (rc < 0)
62            bb_error_msg_and_die("an error occurred updating password for %s", name);
63        if (rc)
64            bb_info_msg("Password for '%s' changed", name);
65        logmode = LOGMODE_STDIO;
66        free(name);
67        if (!(opt & OPT_ENC))
68            free(pass);
69    }
70    return EXIT_SUCCESS;
71}
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