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(),
11
35
SIGQUIT, SIGHUP, SIGTERM */
12
36
#include <stddef.h> /* NULL, size_t */
13
37
#include <sys/types.h> /* ssize_t */
14
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE */
38
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
15
40
#include <stdio.h> /* fprintf(), stderr, getline(),
16
41
stdin, feof(), perror(), fputc(),
42
stdout, getopt_long */
18
43
#include <errno.h> /* errno, EINVAL */
19
44
#include <iso646.h> /* or, not */
20
45
#include <stdbool.h> /* bool, false, true */
21
46
#include <string.h> /* strlen, rindex, strncmp, strcmp */
47
#include <getopt.h> /* getopt_long */
23
49
volatile bool quit_now = false;
24
50
bool debug = false;
26
void termination_handler(int signum){
52
static void termination_handler(__attribute__((unused))int signum){
30
56
int main(int argc, char **argv){
33
59
struct termios t_new, t_old;
34
60
char *buffer = NULL;
35
62
int status = EXIT_SUCCESS;
36
63
struct sigaction old_action,
37
64
new_action = { .sa_handler = termination_handler,
39
const char db[] = "--debug";
40
char *basename = rindex(argv[0], '/');
47
char *program_name = malloc(strlen(basename) + sizeof(db));
48
if (program_name == NULL){
53
program_name[0] = '\0';
55
for (int i = 1; i < argc; i++){
56
if (not strncmp(argv[i], db, 5)){
57
strcat(strcat(strcat(program_name, db ), "="), basename);
58
if(not strcmp(argv[i], db) or not strcmp(argv[i], program_name)){
68
static struct option long_options[] = {
69
{"debug", no_argument, (int *)&debug, 1},
70
{"prefix", required_argument, 0, 'p'},
74
ret = getopt_long (argc, argv, "p:", long_options, &option_index);
87
fprintf(stderr, "bad arguments\n");
66
93
fprintf(stderr, "Starting %s\n", argv[0]);
76
103
sigemptyset(&new_action.sa_mask);
77
104
sigaddset(&new_action.sa_mask, SIGINT);
78
sigaddset(&new_action.sa_mask, SIGQUIT);
79
105
sigaddset(&new_action.sa_mask, SIGHUP);
80
106
sigaddset(&new_action.sa_mask, SIGTERM);
81
107
sigaction(SIGINT, NULL, &old_action);
82
108
if (old_action.sa_handler != SIG_IGN)
83
109
sigaction(SIGINT, &new_action, NULL);
84
sigaction(SIGQUIT, NULL, &old_action);
85
if (old_action.sa_handler != SIG_IGN)
86
sigaction(SIGQUIT, &new_action, NULL);
87
110
sigaction(SIGHUP, NULL, &old_action);
88
111
if (old_action.sa_handler != SIG_IGN)
89
112
sigaction(SIGHUP, &new_action, NULL);
111
134
status = EXIT_FAILURE;
114
fprintf(stderr, "Password: ");
139
fprintf(stderr, "%s Password: ", prefix);
141
fprintf(stderr, "Password: ");
115
143
ret = getline(&buffer, &n, stdin);
117
145
fprintf(stdout, "%s", buffer);