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
;