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/* vi: set sw=4 ts=4: */
/*
* 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.
*/
#include "libbb.h"
#if ENABLE_GETOPT_LONG
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
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! */
if (getuid())
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
opt_complementary = "m--e:e--m";
IF_GETOPT_LONG(applet_long_options = chpasswd_longopts;)
opt = getopt32(argv, "em");
while ((name = xmalloc_fgetline(stdin)) != NULL) {
pass = strchr(name, ':');
if (!pass)
bb_error_msg_and_die("missing new password");
*pass++ = '\0';
xuname2uid(name); /* dies if there is no such user */
if (!(opt & OPT_ENC)) {
rnd = crypt_make_salt(salt, 1, rnd);
if (opt & OPT_MD5) {
strcpy(salt, "$1$");
rnd = crypt_make_salt(salt + 3, 4, rnd);
}
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 */
#endif
rc = update_passwd(bb_path_passwd_file, name, pass, NULL);
/* LOGMODE_BOTH logs to syslog also */
logmode = LOGMODE_BOTH;
if (rc < 0)
bb_error_msg_and_die("an error occurred updating password for %s", name);
if (rc)
bb_info_msg("Password for '%s' changed", name);
logmode = LOGMODE_STDIO;
free(name);
if (!(opt & OPT_ENC))
free(pass);
}
return EXIT_SUCCESS;
}
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