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Patch from Tito to make vlock much smaller.

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This commit is contained in:
Rob Landley 2005-12-19 02:50:10 +00:00
parent 553d83d427
commit 68eb9dd371
1 changed files with 15 additions and 95 deletions
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110
loginutils/vlock.c
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@ -45,29 +45,7 @@ static struct passwd *pw;
static struct vt_mode ovtm; static struct vt_mode ovtm;
static struct termios oterm; static struct termios oterm;
static int vfd; static int vfd;
static int o_lock_all = 0; static unsigned long o_lock_all;
#ifdef CONFIG_FEATURE_SHADOWPASSWDS
static struct spwd *spw;
/* getspuid - get a shadow entry by uid */
static struct spwd *getspuid(uid_t uid)
{
struct spwd *sp;
struct passwd *mypw;
if ((mypw = getpwuid(getuid())) == NULL) {
return (NULL);
}
setspent();
while ((sp = getspent()) != NULL) {
if (strcmp(mypw->pw_name, sp->sp_namp) == 0)
break;
}
endspent();
return (sp);
}
#endif
static void release_vt(int signo) static void release_vt(int signo)
{ {
@ -93,52 +71,23 @@ extern int vlock_main(int argc, char **argv)
sigset_t sig; sigset_t sig;
struct sigaction sa; struct sigaction sa;
struct vt_mode vtm; struct vt_mode vtm;
int times = 0;
struct termios term; struct termios term;
if (argc > 2) { if (argc > 2) {
bb_show_usage(); bb_show_usage();
} }
if (argc == 2) { o_lock_all = bb_getopt_ulflags (argc, argv, "a");
if (strcmp(argv[1], "-a")) {
bb_show_usage(); if((pw = getpwuid(getuid())) == NULL) {
} else { bb_error_msg_and_die("Unknown uid %d", getuid());
o_lock_all = 1;
}
} }
if ((pw = getpwuid(getuid())) == NULL) { vfd = bb_xopen(CURRENT_TTY, O_RDWR);
bb_error_msg_and_die("no password for uid %d\n", getuid());
}
#ifdef CONFIG_FEATURE_SHADOWPASSWDS
if ((strcmp(pw->pw_passwd, "x") == 0)
|| (strcmp(pw->pw_passwd, "*") == 0)) {
if ((spw = getspuid(getuid())) == NULL) {
bb_error_msg_and_die("could not read shadow password for uid %d: %s\n",
getuid(), strerror(errno));
}
if (spw->sp_pwdp) {
pw->pw_passwd = spw->sp_pwdp;
}
}
#endif /* CONFIG_FEATURE_SHADOWPASSWDS */
if (pw->pw_passwd[0] == '!' || pw->pw_passwd[0] == '*') {
bb_error_msg_and_die("Account disabled for uid %d\n", getuid());
}
/* we no longer need root privs */
setuid(getuid());
setgid(getgid());
if ((vfd = open("/dev/tty", O_RDWR)) < 0) {
bb_error_msg_and_die("/dev/tty");
};
if (ioctl(vfd, VT_GETMODE, &vtm) < 0) { if (ioctl(vfd, VT_GETMODE, &vtm) < 0) {
bb_error_msg_and_die("/dev/tty"); bb_perror_msg_and_die("VT_GETMODE");
}; }
/* mask a bunch of signals */ /* mask a bunch of signals */
sigprocmask(SIG_SETMASK, NULL, &sig); sigprocmask(SIG_SETMASK, NULL, &sig);
@ -181,45 +130,16 @@ extern int vlock_main(int argc, char **argv)
tcsetattr(STDIN_FILENO, TCSANOW, &term); tcsetattr(STDIN_FILENO, TCSANOW, &term);
do { do {
char *pass, *crypt_pass; printf("Virtual Console%s locked.\n%s's ", (o_lock_all) ? "s" : "", pw->pw_name);
char prompt[100];
if (o_lock_all) {
printf("All Virtual Consoles locked.\n");
} else {
printf("This Virtual Console locked.\n");
}
fflush(stdout); fflush(stdout);
if (correct_password (pw)) {
snprintf(prompt, 100, "%s's password: ", pw->pw_name); break;
if ((pass = bb_askpass(0, prompt)) == NULL) {
restore_terminal();
bb_perror_msg_and_die("password");
}
crypt_pass = pw_encrypt(pass, pw->pw_passwd);
if (strcmp(crypt_pass, pw->pw_passwd) == 0) {
memset(pass, 0, strlen(pass));
memset(crypt_pass, 0, strlen(crypt_pass));
restore_terminal();
return 0;
}
memset(pass, 0, strlen(pass));
memset(crypt_pass, 0, strlen(crypt_pass));
if (isatty(STDIN_FILENO) == 0) {
restore_terminal();
bb_perror_msg_and_die("isatty");
}
sleep(++times);
printf("Password incorrect.\n");
if (times >= 3) {
sleep(15);
times = 2;
} }
sleep(10);
puts("Password incorrect.");
} while (1); } while (1);
restore_terminal();
return 0;
} }
/* /*