* chpasswd.c
*
* Written for SLIND (from passwd.c) by Alexander Shishkin <virtuoso@slind.org>
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
-#if ENABLE_GETOPT_LONG
+//usage:#define chpasswd_trivial_usage
+//usage: IF_LONG_OPTS("[--md5|--encrypted]") IF_NOT_LONG_OPTS("[-m|-e]")
+//usage:#define chpasswd_full_usage "\n\n"
+//usage: "Read user:password from stdin and update /etc/passwd\n"
+//usage: IF_LONG_OPTS(
+//usage: "\n -e,--encrypted Supplied passwords are in encrypted form"
+//usage: "\n -m,--md5 Use MD5 encryption instead of DES"
+//usage: )
+//usage: IF_NOT_LONG_OPTS(
+//usage: "\n -e Supplied passwords are in encrypted form"
+//usage: "\n -m Use MD5 encryption instead of DES"
+//usage: )
+
+//TODO: implement -c ALGO
+
+#if ENABLE_LONG_OPTS
static const char chpasswd_longopts[] ALIGN1 =
"encrypted\0" No_argument "e"
"md5\0" No_argument "m"
;
#endif
-#define OPT_ENC 1
-#define OPT_MD5 2
+#define OPT_ENC 1
+#define OPT_MD5 2
int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int chpasswd_main(int argc UNUSED_PARAM, char **argv)
{
- char *name, *pass;
- char salt[sizeof("$N$XXXXXXXX")];
- int opt, rc;
- int rnd = rnd; /* we *want* it to be non-initialized! */
+ char *name;
+ int opt;
- if (getuid())
+ if (getuid() != 0)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
opt_complementary = "m--e:e--m";
- USE_GETOPT_LONG(applet_long_options = chpasswd_longopts;)
+ IF_LONG_OPTS(applet_long_options = chpasswd_longopts;)
opt = getopt32(argv, "em");
while ((name = xmalloc_fgetline(stdin)) != NULL) {
+ char *free_me;
+ char *pass;
+ int rc;
+
pass = strchr(name, ':');
if (!pass)
bb_error_msg_and_die("missing new password");
xuname2uid(name); /* dies if there is no such user */
+ free_me = NULL;
if (!(opt & OPT_ENC)) {
- rnd = crypt_make_salt(salt, 1, rnd);
+ char salt[sizeof("$N$XXXXXXXX")];
+
+ crypt_make_salt(salt, 1);
if (opt & OPT_MD5) {
- strcpy(salt, "$1$");
- rnd = crypt_make_salt(salt + 3, 4, rnd);
+ salt[0] = '$';
+ salt[1] = '1';
+ salt[2] = '$';
+ crypt_make_salt(salt + 3, 4);
}
- pass = pw_encrypt(pass, salt, 0);
+ free_me = pass = pw_encrypt(pass, salt, 0);
}
/* This is rather complex: if user is not found in /etc/shadow,
* we try to find & change his passwd in /etc/passwd */
#if ENABLE_FEATURE_SHADOWPASSWDS
rc = update_passwd(bb_path_shadow_file, name, pass, NULL);
- if (rc == 0) /* no lines updated, no errors detected */
+ if (rc > 0) /* password in /etc/shadow was updated */
+ pass = (char*)"x";
+ if (rc >= 0)
+ /* 0 = /etc/shadow missing (not an error), >0 = passwd changed in /etc/shadow */
#endif
rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
/* LOGMODE_BOTH logs to syslog also */
bb_info_msg("Password for '%s' changed", name);
logmode = LOGMODE_STDIO;
free(name);
- if (!(opt & OPT_ENC))
- free(pass);
+ free(free_me);
}
return EXIT_SUCCESS;
}