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(),
43
stdout, getopt_long */
44
#include <errno.h> /* errno, EINVAL */
42
stdin, feof(), fputc()
44
#include <errno.h> /* errno, EBADF, ENOTTY, EINVAL,
45
EFAULT, EFBIG, EIO, ENOSPC, EINTR
47
#include <error.h> /* error() */
45
48
#include <iso646.h> /* or, not */
46
49
#include <stdbool.h> /* bool, false, true */
47
#include <string.h> /* strlen, rindex, strncmp, strcmp */
50
#include <string.h> /* strlen, rindex */
48
51
#include <argp.h> /* struct argp_option, struct
49
52
argp_state, struct argp,
50
53
argp_parse(), error_t,
51
54
ARGP_KEY_ARG, ARGP_KEY_END,
52
55
ARGP_ERR_UNKNOWN */
56
#include <sysexits.h> /* EX_SOFTWARE, EX_OSERR,
57
EX_UNAVAILABLE, EX_IOERR, EX_OK */
54
59
volatile sig_atomic_t quit_now = 0;
55
60
int signal_received;
82
88
.doc = "Prefix shown before the prompt", .group = 2 },
83
89
{ .name = "debug", .key = 128,
84
90
.doc = "Debug mode", .group = 3 },
92
* These reproduce what we would get without ARGP_NO_HELP
94
{ .name = "help", .key = '?',
95
.doc = "Give this help list", .group = -1 },
96
{ .name = "usage", .key = -3,
97
.doc = "Give a short usage message", .group = -1 },
98
{ .name = "version", .key = 'V',
99
.doc = "Print program version", .group = -1 },
88
103
error_t parse_opt (int key, char *arg, struct argp_state *state){
113
* These reproduce what we would get without ARGP_NO_HELP
115
case '?': /* --help */
116
argp_state_help(state, state->out_stream,
117
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
118
& ~(unsigned int)ARGP_HELP_EXIT_OK);
119
case -3: /* --usage */
120
argp_state_help(state, state->out_stream,
121
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
122
case 'V': /* --version */
123
fprintf(state->out_stream, "%s\n", argp_program_version);
124
exit(argp_err_exit_status);
102
127
return ARGP_ERR_UNKNOWN;
107
132
struct argp argp = { .options = options, .parser = parse_opt,
109
134
.doc = "Mandos password-prompt -- Read and"
110
135
" output a password" };
111
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
112
if(ret == ARGP_ERR_UNKNOWN){
113
fprintf(stderr, "Unknown error while parsing arguments\n");
136
ret = argp_parse(&argp, argc, argv,
137
ARGP_IN_ORDER | ARGP_NO_HELP, NULL, NULL);
144
error(0, errno, "argp_parse");
125
158
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
160
error(0, errno, "tcgetattr");
164
return EX_UNAVAILABLE;
130
170
sigemptyset(&new_action.sa_mask);
131
171
ret = sigaddset(&new_action.sa_mask, SIGINT);
173
error(0, errno, "sigaddset");
136
176
ret = sigaddset(&new_action.sa_mask, SIGHUP);
178
error(0, errno, "sigaddset");
141
181
ret = sigaddset(&new_action.sa_mask, SIGTERM);
183
error(0, errno, "sigaddset");
146
186
/* Need to check if the handler is SIG_IGN before handling:
147
187
| [[info:libc:Initial Signal Actions]] |
150
190
ret = sigaction(SIGINT, NULL, &old_action);
192
error(0, errno, "sigaction");
155
195
if(old_action.sa_handler != SIG_IGN){
156
196
ret = sigaction(SIGINT, &new_action, NULL);
198
error(0, errno, "sigaction");
162
202
ret = sigaction(SIGHUP, NULL, &old_action);
204
error(0, errno, "sigaction");
167
207
if(old_action.sa_handler != SIG_IGN){
168
208
ret = sigaction(SIGHUP, &new_action, NULL);
210
error(0, errno, "sigaction");
174
214
ret = sigaction(SIGTERM, NULL, &old_action);
216
error(0, errno, "sigaction");
179
219
if(old_action.sa_handler != SIG_IGN){
180
220
ret = sigaction(SIGTERM, &new_action, NULL);
222
error(0, errno, "sigaction");
212
260
fprintf(stderr, "%s ", prefix);
215
const char *cryptsource = getenv("cryptsource");
216
const char *crypttarget = getenv("crypttarget");
217
const char *const prompt
218
= "Enter passphrase to unlock the disk";
263
const char *cryptsource = getenv("CRYPTTAB_SOURCE");
264
const char *crypttarget = getenv("CRYPTTAB_NAME");
265
/* Before cryptsetup 1.1.0~rc2 */
266
if(cryptsource == NULL){
267
cryptsource = getenv("cryptsource");
269
if(crypttarget == NULL){
270
crypttarget = getenv("crypttarget");
272
const char *const prompt1 = "Unlocking the disk";
273
const char *const prompt2 = "Enter passphrase";
219
274
if(cryptsource == NULL){
220
275
if(crypttarget == NULL){
221
fprintf(stderr, "%s: ", prompt);
276
fprintf(stderr, "%s to unlock the disk: ", prompt2);
223
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
278
fprintf(stderr, "%s (%s)\n%s: ", prompt1, crypttarget,
226
282
if(crypttarget == NULL){
227
fprintf(stderr, "%s %s: ", prompt, cryptsource);
283
fprintf(stderr, "%s %s\n%s: ", prompt1, cryptsource,
229
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
286
fprintf(stderr, "%s %s (%s)\n%s: ", prompt1, cryptsource,
287
crypttarget, prompt2);
234
ret = getline(&buffer, &n, stdin);
291
sret = getline(&buffer, &n, stdin);
236
293
status = EXIT_SUCCESS;
237
294
/* Make n = data size instead of allocated buffer size */
239
296
/* Strip final newline */
240
if(n>0 and buffer[n-1] == '\n'){
297
if(n > 0 and buffer[n-1] == '\n'){
241
298
buffer[n-1] = '\0'; /* not strictly necessary */
244
301
size_t written = 0;
245
302
while(written < n){
246
ret = write(STDOUT_FILENO, buffer + written, n - written);
249
status = EXIT_FAILURE;
252
written += (size_t)ret;
303
sret = write(STDOUT_FILENO, buffer + written, n - written);
306
error(0, errno, "write");
318
status = EXIT_FAILURE;
323
written += (size_t)sret;
325
sret = close(STDOUT_FILENO);
328
error(0, errno, "close");
257
343
if(errno != EINTR and not feof(stdin)){
259
status = EXIT_FAILURE;
344
error(0, errno, "getline");
347
status = EX_UNAVAILABLE;
263
/* if(ret == 0), then the only sensible thing to do is to retry to
357
/* if(sret == 0), then the only sensible thing to do is to retry to
264
358
read from stdin */
265
359
fputc('\n', stderr);
266
360
if(debug and not quit_now){