mirror of
https://github.com/sheumann/hush.git
synced 2024-08-13 19:29:09 +00:00
68404f13d4
function old new delta procps_scan 1265 1298 +33 aliascmd 278 283 +5 parse_file_cmd 116 120 +4 dname_enc 373 377 +4 setcmd 90 93 +3 execcmd 57 60 +3 count_lines 72 74 +2 process_command_subs 340 339 -1 test_main 409 407 -2 mknod_main 179 177 -2 handle_incoming_and_exit 2653 2651 -2 argstr 1312 1310 -2 shiftcmd 131 128 -3 exitcmd 46 43 -3 dotcmd 297 294 -3 breakcmd 86 83 -3 evalpipe 353 349 -4 evalcommand 1180 1176 -4 evalcmd 109 105 -4 send_tree 374 369 -5 mkfifo_main 82 77 -5 evalsubshell 152 147 -5 typecmd 75 69 -6 letcmd 61 55 -6 add_cmd 1190 1183 -7 main 891 883 -8 ash_main 1415 1407 -8 parse_stream 1377 1367 -10 alloc_procps_scan 55 - -55 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148) Total: -94 bytes text data bss dec hex filename 797195 658 7428 805281 c49a1 busybox_old 797101 658 7428 805187 c4943 busybox_unstripped
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini sulogin implementation for busybox
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include <syslog.h>
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//static void catchalarm(int ATTRIBUTE_UNUSED junk)
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//{
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// exit(EXIT_FAILURE);
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//}
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int sulogin_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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char *cp;
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int timeout = 0;
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char *timeout_arg;
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struct passwd *pwd;
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const char *shell;
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#if ENABLE_FEATURE_SHADOWPASSWDS
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/* Using _r function to avoid pulling in static buffers */
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char buffer[256];
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struct spwd spw;
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#endif
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logmode = LOGMODE_BOTH;
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openlog(applet_name, 0, LOG_AUTH);
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if (getopt32(argv, "t:", &timeout_arg)) {
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timeout = xatoi_u(timeout_arg);
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}
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if (argv[optind]) {
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close(0);
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close(1);
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dup(xopen(argv[optind], O_RDWR));
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close(2);
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dup(0);
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}
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if (!isatty(0) || !isatty(1) || !isatty(2)) {
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logmode = LOGMODE_SYSLOG;
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bb_error_msg_and_die("not a tty");
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}
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/* Clear dangerous stuff, set PATH */
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sanitize_env_if_suid();
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// bb_askpass() already handles this
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// signal(SIGALRM, catchalarm);
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pwd = getpwuid(0);
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if (!pwd) {
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goto auth_error;
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}
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#if ENABLE_FEATURE_SHADOWPASSWDS
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{
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/* getspnam_r may return 0 yet set result to NULL.
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* At least glibc 2.4 does this. Be extra paranoid here. */
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struct spwd *result = NULL;
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int r = getspnam_r(pwd->pw_name, &spw, buffer, sizeof(buffer), &result);
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if (r || !result) {
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goto auth_error;
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}
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pwd->pw_passwd = result->sp_pwdp;
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}
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#endif
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while (1) {
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/* cp points to a static buffer that is zeroed every time */
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cp = bb_askpass(timeout,
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"Give root password for system maintenance\n"
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"(or type Control-D for normal startup):");
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if (!cp || !*cp) {
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bb_info_msg("Normal startup");
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return 0;
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}
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if (strcmp(pw_encrypt(cp, pwd->pw_passwd), pwd->pw_passwd) == 0) {
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break;
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}
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bb_do_delay(FAIL_DELAY);
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bb_error_msg("login incorrect");
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}
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memset(cp, 0, strlen(cp));
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// signal(SIGALRM, SIG_DFL);
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bb_info_msg("System Maintenance Mode");
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USE_SELINUX(renew_current_security_context());
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shell = getenv("SUSHELL");
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if (!shell)
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shell = getenv("sushell");
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if (!shell) {
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shell = "/bin/sh";
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if (pwd->pw_shell[0])
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shell = pwd->pw_shell;
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}
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/* Exec login shell with no additional parameters. Never returns. */
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run_shell(shell, 1, NULL, NULL);
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auth_error:
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bb_error_msg_and_die("no password entry for root");
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}
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