mirror of
https://github.com/sheumann/hush.git
synced 2024-07-04 21:29:34 +00:00
1d42665b6b
function old new delta getopt32 1370 1385 +15 sulogin_main 490 494 +4 realpath_main 84 86 +2 sleep_main 76 77 +1 mt_main 256 257 +1 printenv_main 75 74 -1 fdformat_main 546 545 -1 usleep_main 44 42 -2 setlogcons_main 77 75 -2 ed_main 2654 2649 -5 deallocvt_main 69 64 -5 addgroup_main 373 368 -5 mkfs_minix_main 2989 2982 -7 tail_main 1221 1213 -8 sv_main 1254 1241 -13 du_main 348 328 -20 tftp_main 325 302 -23 split_main 581 558 -23 nc_main 1000 977 -23 diff_main 891 868 -23 arping_main 1797 1770 -27 ls_main 893 847 -46 od_main 2797 2750 -47 readprofile_main 1944 1895 -49 tcpudpsvd_main 1973 1922 -51 udhcpc_main 2590 2513 -77 grep_main 824 722 -102 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/22 up/down: 23/-560) Total: -537 bytes text data bss dec hex filename 796973 658 7428 805059 c48c3 busybox_old 796479 662 7420 804561 c46d1 busybox_unstripped
111 lines
2.4 KiB
C
111 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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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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opt_complementary = "t+"; /* -t N */
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getopt32(argv, "t:", &timeout);
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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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/* Malicious use like "sulogin /dev/sda"? */
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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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