19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
* <https://www.fukt.bsnet.se/~teddy/>.
25
26
#define _GNU_SOURCE /* getline() */
37
38
#include <stddef.h> /* NULL, size_t, ssize_t */
38
39
#include <sys/types.h> /* ssize_t */
39
40
#include <stdlib.h> /* EXIT_SUCCESS, EXIT_FAILURE,
41
getopt_long, getenv() */
41
42
#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
43
stdin, feof(), perror(), fputc(),
44
stdout, getopt_long */
45
#include <errno.h> /* errno, EINVAL */
47
46
#include <iso646.h> /* or, not */
48
47
#include <stdbool.h> /* bool, false, true */
49
48
#include <string.h> /* strlen, rindex, strncmp, strcmp */
52
51
argp_parse(), error_t,
53
52
ARGP_KEY_ARG, ARGP_KEY_END,
54
53
ARGP_ERR_UNKNOWN */
55
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
56
EX_UNAVAILABLE, EX_IOERR, EX_OK */
58
55
volatile sig_atomic_t quit_now = 0;
59
56
int signal_received;
86
83
.doc = "Prefix shown before the prompt", .group = 2 },
87
84
{ .name = "debug", .key = 128,
88
85
.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
89
error_t parse_opt (int key, char *arg, struct argp_state *state){
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
103
return ARGP_ERR_UNKNOWN;
130
108
struct argp argp = { .options = options, .parser = parse_opt,
132
110
.doc = "Mandos password-prompt -- Read and"
133
111
" output a password" };
134
ret = argp_parse(&argp, argc, argv,
135
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
142
perror("argp_parse");
112
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
113
if(ret == ARGP_ERR_UNKNOWN){
114
fprintf(stderr, "Unknown error while parsing arguments\n");
156
126
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
158
127
perror("tcgetattr");
162
return EX_UNAVAILABLE;
168
131
sigemptyset(&new_action.sa_mask);
169
132
ret = sigaddset(&new_action.sa_mask, SIGINT);
171
134
perror("sigaddset");
174
137
ret = sigaddset(&new_action.sa_mask, SIGHUP);
176
139
perror("sigaddset");
179
142
ret = sigaddset(&new_action.sa_mask, SIGTERM);
181
144
perror("sigaddset");
184
147
/* Need to check if the handler is SIG_IGN before handling:
185
148
| [[info:libc:Initial Signal Actions]] |
188
151
ret = sigaction(SIGINT, NULL, &old_action);
190
153
perror("sigaction");
193
156
if(old_action.sa_handler != SIG_IGN){
194
157
ret = sigaction(SIGINT, &new_action, NULL);
196
159
perror("sigaction");
200
163
ret = sigaction(SIGHUP, NULL, &old_action);
202
165
perror("sigaction");
205
168
if(old_action.sa_handler != SIG_IGN){
206
169
ret = sigaction(SIGHUP, &new_action, NULL);
208
171
perror("sigaction");
212
175
ret = sigaction(SIGTERM, NULL, &old_action);
214
177
perror("sigaction");
217
180
if(old_action.sa_handler != SIG_IGN){
218
181
ret = sigaction(SIGTERM, &new_action, NULL);
220
183
perror("sigaction");
231
t_new.c_lflag &= ~(tcflag_t)ECHO;
194
t_new.c_lflag &= ~ECHO;
232
195
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
234
196
perror("tcsetattr-echo");
238
return EX_UNAVAILABLE;
246
201
fprintf(stderr, "Waiting for input from stdin \n");
258
213
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";
216
const char *cryptsource = getenv("cryptsource");
217
const char *crypttarget = getenv("crypttarget");
218
const char *const prompt
219
= "Enter passphrase to unlock the disk";
272
220
if(cryptsource == NULL){
273
221
if(crypttarget == NULL){
274
fprintf(stderr, "%s to unlock the disk: ", prompt2);
222
fprintf(stderr, "%s: ", prompt);
276
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
224
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
280
227
if(crypttarget == NULL){
281
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
228
fprintf(stderr, "%s %s: ", prompt, cryptsource);
284
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
285
crypttarget, prompt2);
230
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
292
238
/* Make n = data size instead of allocated buffer size */
294
240
/* Strip final newline */
295
if(n > 0 and buffer[n-1] == '\n'){
241
if(n>0 and buffer[n-1] == '\n'){
296
242
buffer[n-1] = '\0'; /* not strictly necessary */
385
294
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
388
if(status == EXIT_SUCCESS or status == EX_OK){
297
if(status == EXIT_SUCCESS){
389
298
fputc('\n', stderr);