1 /* vi: set sw=4 ts=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.
10 //usage:#define chpasswd_trivial_usage
11 //usage: IF_LONG_OPTS("[--md5|--encrypted]") IF_NOT_LONG_OPTS("[-m|-e]")
12 //usage:#define chpasswd_full_usage "\n\n"
13 //usage: "Read user:password from stdin and update /etc/passwd\n"
14 //usage: IF_LONG_OPTS(
15 //usage: "\n -e,--encrypted Supplied passwords are in encrypted form"
16 //usage: "\n -m,--md5 Use MD5 encryption instead of DES"
18 //usage: IF_NOT_LONG_OPTS(
19 //usage: "\n -e Supplied passwords are in encrypted form"
20 //usage: "\n -m Use MD5 encryption instead of DES"
23 //TODO: implement -c ALGO
26 static const char chpasswd_longopts[] ALIGN1 =
27 "encrypted\0" No_argument "e"
28 "md5\0" No_argument "m"
35 int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
36 int chpasswd_main(int argc UNUSED_PARAM, char **argv)
42 bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
44 opt_complementary = "m--e:e--m";
45 IF_LONG_OPTS(applet_long_options = chpasswd_longopts;)
46 opt = getopt32(argv, "em");
48 while ((name = xmalloc_fgetline(stdin)) != NULL) {
53 pass = strchr(name, ':');
55 bb_error_msg_and_die("missing new password");
58 xuname2uid(name); /* dies if there is no such user */
61 if (!(opt & OPT_ENC)) {
62 char salt[sizeof("$N$XXXXXXXX")];
64 crypt_make_salt(salt, 1);
69 crypt_make_salt(salt + 3, 4);
71 free_me = pass = pw_encrypt(pass, salt, 0);
74 /* This is rather complex: if user is not found in /etc/shadow,
75 * we try to find & change his passwd in /etc/passwd */
76 #if ENABLE_FEATURE_SHADOWPASSWDS
77 rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
78 if (rc > 0) /* password in /etc/shadow was updated */
81 /* 0 = /etc/shadow missing (not an error), >0 = passwd changed in /etc/shadow */
83 rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
84 /* LOGMODE_BOTH logs to syslog also */
85 logmode = LOGMODE_BOTH;
87 bb_error_msg_and_die("an error occurred updating password for %s", name);
89 bb_info_msg("Password for '%s' changed", name);
90 logmode = LOGMODE_STDIO;