/* 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"; USE_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); if (rc == 0) /* no lines updated, no errors detected */ #endif rc = update_passwd(bb_path_passwd_file, name, pass); /* 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; }