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/***
This file is part of pam_dotfile.
pam_dotfile is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
pam_dotfile is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with pam_dotfile; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
***/
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <pwd.h>
#include "common.h"
#include "log.h"
#define DELAY 5
int main(int argc, char* argv[]) {
context_t c;
char *username;
static char password[128];
int r;
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
signal(SIGUSR1, SIG_IGN);
signal(SIGUSR2, SIG_IGN);
signal(SIGTSTP, SIG_IGN);
memset(&c, 0, sizeof(context_t));
if (isatty(0) || isatty(1) || isatty(2)) {
int n;
struct passwd *pw;
uid_t uid = getuid();
pw = getpwuid(uid);
fprintf(stderr, "This program is not intended to be run in this way.\n");
logmsg(&c, LOG_WARNING, "A stupid user (%s; uid=%i) ran pam-dotfile-helper on the command line", pw ? pw->pw_name : "???", uid);
n = 5;
while ((n = sleep(n)) > 0);
return 1;
}
if (argc != 7) {
logmsg(&c, LOG_WARNING, "Invalid invocation");
return 4;
}
c.service = argv[1];
username = argv[2];
if (!strcmp(argv[3], "debug"))
c.opt_debug = 1;
if (!strcmp(argv[4], "no_warn"))
c.opt_no_warn = 1;
if (!strcmp(argv[5], "stat_only_home"))
c.opt_stat_only_home = 1;
#ifdef COMPAT05
if (!strcmp(argv[6], "nocompat05"))
c.opt_nocompat05 = 1;
#endif
logmsg(&c, LOG_DEBUG, "%s|%s|%s",
c.opt_debug ? "debug" : "nodebug",
c.opt_no_warn ? "no_warn" : "warn"
#ifdef COMPAT05
,c.opt_nocompat05 ? "nocompat05" : "compat05"
#endif
);
if (geteuid() != 0) {
logmsg(&c, LOG_WARNING, "Not run as root, executable is probably not SETUID?");
return 4;
}
logmsg(&c, LOG_DEBUG, "Helper started");
if (!fgets(password, sizeof(password), stdin)) {
logmsg(&c, LOG_WARNING, "Failure reading from STDIN");
return 4;
}
switch (user_authentication(&c, username, password)) {
case PAM_SUCCESS: r = 0; break;
case PAM_AUTH_ERR: r = 1; break;
case PAM_AUTHINFO_UNAVAIL: r = 2; break;
case PAM_USER_UNKNOWN: r = 3; break;
default: r = 4; break;
}
logmsg(&c, LOG_DEBUG, "Helper exiting with return value %u", r);
return r;
}
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