32
33
#include <signal.h> /* sig_atomic_t, raise(), struct
33
34
sigaction, sigemptyset(),
34
35
sigaction(), sigaddset(), SIGINT,
35
SIGQUIT, SIGHUP, SIGTERM,
36
SIGQUIT, SIGHUP, SIGTERM */
37
37
#include <stddef.h> /* NULL, size_t, ssize_t */
38
38
#include <sys/types.h> /* ssize_t */
39
39
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
40
getopt_long, getenv() */
41
41
#include <stdio.h> /* fprintf(), stderr, getline(),
42
stdin, feof(), perror(), fputc()
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
42
stdin, feof(), perror(), fputc(),
43
stdout, getopt_long */
44
#include <errno.h> /* errno, EINVAL */
47
45
#include <iso646.h> /* or, not */
48
46
#include <stdbool.h> /* bool, false, true */
49
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
86
77
.doc = "Prefix shown before the prompt", .group = 2 },
87
78
{ .name = "debug", .key = 128,
88
79
.doc = "Debug mode", .group = 3 },
90
* These reproduce what we would get without ARGP_NO_HELP
92
{ .name = "help", .key = '?',
93
.doc = "Give this help list", .group = -1 },
94
{ .name = "usage", .key = -3,
95
.doc = "Give a short usage message", .group = -1 },
96
{ .name = "version", .key = 'V',
97
.doc = "Print program version", .group = -1 },
101
error_t parse_opt (int key, char *arg, struct argp_state *state){
83
error_t parse_opt (int key, char *arg, struct argp_state *state) {
84
/* Get the INPUT argument from `argp_parse', which we know is a
85
pointer to our plugin list pointer. */
111
* These reproduce what we would get without ARGP_NO_HELP
113
case '?': /* --help */
114
argp_state_help(state, state->out_stream,
115
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
116
& ~(unsigned int)ARGP_HELP_EXIT_OK);
117
case -3: /* --usage */
118
argp_state_help(state, state->out_stream,
119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
120
case 'V': /* --version */
121
fprintf(state->out_stream, "%s\n", argp_program_version);
122
exit(argp_err_exit_status);
125
99
return ARGP_ERR_UNKNOWN;
130
104
struct argp argp = { .options = options, .parser = parse_opt,
132
106
.doc = "Mandos password-prompt -- Read and"
133
107
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
142
perror("argp_parse");
108
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
109
if (ret == ARGP_ERR_UNKNOWN){
110
fprintf(stderr, "Unknown error while parsing arguments\n");
150
116
fprintf(stderr, "Starting %s\n", argv[0]);
153
119
fprintf(stderr, "Storing current terminal attributes\n");
156
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
122
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
158
123
perror("tcgetattr");
162
return EX_UNAVAILABLE;
168
127
sigemptyset(&new_action.sa_mask);
169
ret = sigaddset(&new_action.sa_mask, SIGINT);
174
ret = sigaddset(&new_action.sa_mask, SIGHUP);
179
ret = sigaddset(&new_action.sa_mask, SIGTERM);
184
/* Need to check if the handler is SIG_IGN before handling:
185
| [[info:libc:Initial Signal Actions]] |
186
| [[info:libc:Basic Signal Handling]] |
128
sigaddset(&new_action.sa_mask, SIGINT);
129
sigaddset(&new_action.sa_mask, SIGHUP);
130
sigaddset(&new_action.sa_mask, SIGTERM);
188
131
ret = sigaction(SIGINT, NULL, &old_action);
190
133
perror("sigaction");
193
if(old_action.sa_handler != SIG_IGN){
136
if (old_action.sa_handler != SIG_IGN){
194
137
ret = sigaction(SIGINT, &new_action, NULL);
196
139
perror("sigaction");
200
143
ret = sigaction(SIGHUP, NULL, &old_action);
202
145
perror("sigaction");
205
if(old_action.sa_handler != SIG_IGN){
148
if (old_action.sa_handler != SIG_IGN){
206
149
ret = sigaction(SIGHUP, &new_action, NULL);
208
151
perror("sigaction");
212
155
ret = sigaction(SIGTERM, NULL, &old_action);
214
157
perror("sigaction");
217
if(old_action.sa_handler != SIG_IGN){
160
if (old_action.sa_handler != SIG_IGN){
218
161
ret = sigaction(SIGTERM, &new_action, NULL);
220
163
perror("sigaction");
227
170
fprintf(stderr, "Removing echo flag from terminal attributes\n");
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
232
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
174
t_new.c_lflag &= ~ECHO;
175
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
176
perror("tcsetattr-echo");
238
return EX_UNAVAILABLE;
246
181
fprintf(stderr, "Waiting for input from stdin \n");
251
186
fprintf(stderr, "Interrupted by signal, exiting.\n");
258
193
fprintf(stderr, "%s ", prefix);
261
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
262
const char *crypttarget = getenv("CRYPTTAB_NAME");
263
/* Before cryptsetup 1.1.0~rc2 */
264
if(cryptsource == NULL){
265
cryptsource = getenv("cryptsource");
267
if(crypttarget == NULL){
268
crypttarget = getenv("crypttarget");
270
const char *const prompt1 = "Unlocking the disk";
271
const char *const prompt2 = "Enter passphrase";
196
const char *cryptsource = getenv("cryptsource");
197
const char *crypttarget = getenv("crypttarget");
198
const char *const prompt
199
= "Enter passphrase to unlock the disk";
272
200
if(cryptsource == NULL){
273
201
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
202
fprintf(stderr, "%s: ", prompt);
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
204
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
280
207
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
208
fprintf(stderr, "%s %s: ", prompt, cryptsource);
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
210
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
289
215
ret = getline(&buffer, &n, stdin);
291
217
status = EXIT_SUCCESS;
292
218
/* Make n = data size instead of allocated buffer size */
294
220
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
221
if(n>0 and buffer[n-1] == '\n'){
296
222
buffer[n-1] = '\0'; /* not strictly necessary */