1
/* -*- coding: utf-8 -*- */
3
* Passprompt - Read a password from the terminal and print it
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
12
* This program is distributed in the hope that it will be useful, but
13
* WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* General Public License for more details.
17
* You should have received a copy of the GNU General Public License
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
21
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
22
* <https://www.fukt.bsnet.se/~teddy/>.
1
25
#define _GNU_SOURCE /* getline() */
2
#define _FORTIFY_SOURCE 2
3
27
#include <termios.h> /* struct termios, tcsetattr(),
4
28
TCSAFLUSH, tcgetattr(), ECHO */
5
29
#include <unistd.h> /* struct termios, tcsetattr(),
20
44
#include <iso646.h> /* or, not */
21
45
#include <stdbool.h> /* bool, false, true */
22
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
23
#include <getopt.h> /* getopt_long */
47
#include <argp.h> /* struct argp_option,
48
struct argp_state, struct argp,
25
51
volatile bool quit_now = false;
26
52
bool debug = false;
53
const char *argp_program_version = "passprompt 0.9";
54
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
28
void termination_handler(int signum){
56
static void termination_handler(__attribute__((unused))int signum){
39
67
struct sigaction old_action,
40
68
new_action = { .sa_handler = termination_handler,
44
static struct option long_options[] = {
45
{"debug", no_argument, (int *)&debug, 1},
46
{"prefix", required_argument, 0, 'p'},
50
ret = getopt_long (argc, argv, "p:", long_options, &option_index);
63
fprintf(stderr, "bad arguments\n");
71
struct argp_option options[] = {
72
{ .name = "prefix", .key = 'p',
73
.arg = "PREFIX", .flags = 0,
74
.doc = "Prefix used before the passprompt", .group = 2 },
75
{ .name = "debug", .key = 128,
76
.doc = "Debug mode", .group = 3 },
80
error_t parse_opt (int key, char *arg, struct argp_state *state) {
81
/* Get the INPUT argument from `argp_parse', which we know is a
82
pointer to our plugin list pointer. */
96
return ARGP_ERR_UNKNOWN;
101
struct argp argp = { .options = options, .parser = parse_opt,
103
.doc = "Mandos Passprompt -- Provides a passprompt" };
104
argp_parse (&argp, argc, argv, 0, 0, NULL);
69
108
fprintf(stderr, "Starting %s\n", argv[0]);
79
118
sigemptyset(&new_action.sa_mask);
80
119
sigaddset(&new_action.sa_mask, SIGINT);
81
sigaddset(&new_action.sa_mask, SIGQUIT);
82
120
sigaddset(&new_action.sa_mask, SIGHUP);
83
121
sigaddset(&new_action.sa_mask, SIGTERM);
84
122
sigaction(SIGINT, NULL, &old_action);
85
123
if (old_action.sa_handler != SIG_IGN)
86
124
sigaction(SIGINT, &new_action, NULL);
87
sigaction(SIGQUIT, NULL, &old_action);
88
if (old_action.sa_handler != SIG_IGN)
89
sigaction(SIGQUIT, &new_action, NULL);
90
125
sigaction(SIGHUP, NULL, &old_action);
91
126
if (old_action.sa_handler != SIG_IGN)
92
127
sigaction(SIGHUP, &new_action, NULL);
171
/* if(ret == 0), then the only sensible thing to do is to retry to
137
173
fputc('\n', stderr);
141
177
fprintf(stderr, "Restoring terminal attributes\n");
143
179
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
144
180
perror("tcsetattr+echo");
148
184
fprintf(stderr, "%s is exiting\n", argv[0]);