63
70
struct sigaction old_action,
64
71
new_action = { .sa_handler = termination_handler,
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);
74
struct argp_option options[] = {
75
{ .name = "prefix", .key = 'p',
76
.arg = "PREFIX", .flags = 0,
77
.doc = "Prefix shown before the prompt", .group = 2 },
78
{ .name = "debug", .key = 128,
79
.doc = "Debug mode", .group = 3 },
83
error_t parse_opt (int key, char *arg, struct argp_state *state){
97
return ARGP_ERR_UNKNOWN;
87
fprintf(stderr, "bad arguments\n");
102
struct argp argp = { .options = options, .parser = parse_opt,
104
.doc = "Mandos password-prompt -- Read and"
105
" output a password" };
106
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
107
if(ret == ARGP_ERR_UNKNOWN){
108
fprintf(stderr, "Unknown error while parsing arguments\n");
93
114
fprintf(stderr, "Starting %s\n", argv[0]);
96
117
fprintf(stderr, "Storing current terminal attributes\n");
99
if (tcgetattr(STDIN_FILENO, &t_old) != 0){
120
if(tcgetattr(STDIN_FILENO, &t_old) != 0){
100
122
return EXIT_FAILURE;
103
125
sigemptyset(&new_action.sa_mask);
104
126
sigaddset(&new_action.sa_mask, SIGINT);
105
sigaddset(&new_action.sa_mask, SIGQUIT);
106
127
sigaddset(&new_action.sa_mask, SIGHUP);
107
128
sigaddset(&new_action.sa_mask, SIGTERM);
108
sigaction(SIGINT, NULL, &old_action);
109
if (old_action.sa_handler != SIG_IGN)
110
sigaction(SIGINT, &new_action, NULL);
111
sigaction(SIGQUIT, NULL, &old_action);
112
if (old_action.sa_handler != SIG_IGN)
113
sigaction(SIGQUIT, &new_action, NULL);
114
sigaction(SIGHUP, NULL, &old_action);
115
if (old_action.sa_handler != SIG_IGN)
116
sigaction(SIGHUP, &new_action, NULL);
117
sigaction(SIGTERM, NULL, &old_action);
118
if (old_action.sa_handler != SIG_IGN)
119
sigaction(SIGTERM, &new_action, NULL);
129
ret = sigaction(SIGINT, NULL, &old_action);
134
if(old_action.sa_handler != SIG_IGN){
135
ret = sigaction(SIGINT, &new_action, NULL);
141
ret = sigaction(SIGHUP, NULL, &old_action);
146
if(old_action.sa_handler != SIG_IGN){
147
ret = sigaction(SIGHUP, &new_action, NULL);
153
ret = sigaction(SIGTERM, NULL, &old_action);
158
if(old_action.sa_handler != SIG_IGN){
159
ret = sigaction(SIGTERM, &new_action, NULL);
123
168
fprintf(stderr, "Removing echo flag from terminal attributes\n");
127
172
t_new.c_lflag &= ~ECHO;
128
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
173
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_new) != 0){
129
174
perror("tcsetattr-echo");
130
175
return EXIT_FAILURE;
134
179
fprintf(stderr, "Waiting for input from stdin \n");
184
fprintf(stderr, "Interrupted by signal, exiting.\n");
138
186
status = EXIT_FAILURE;
143
fprintf(stderr, "%s Password: ", prefix);
145
fprintf(stderr, "Password: ");
191
fprintf(stderr, "%s ", prefix);
194
const char *cryptsource = getenv("cryptsource");
195
const char *crypttarget = getenv("crypttarget");
196
const char *const prompt
197
= "Enter passphrase to unlock the disk";
198
if(cryptsource == NULL){
199
if(crypttarget == NULL){
200
fprintf(stderr, "%s: ", prompt);
202
fprintf(stderr, "%s (%s): ", prompt, crypttarget);
205
if(crypttarget == NULL){
206
fprintf(stderr, "%s %s: ", prompt, cryptsource);
208
fprintf(stderr, "%s %s (%s): ", prompt, cryptsource,
147
213
ret = getline(&buffer, &n, stdin);
149
fprintf(stdout, "%s", buffer);
150
215
status = EXIT_SUCCESS;
216
/* Make n = data size instead of allocated buffer size */
218
/* Strip final newline */
219
if(n>0 and buffer[n-1] == '\n'){
220
buffer[n-1] = '\0'; /* not strictly necessary */
225
ret = write(STDOUT_FILENO, buffer + written, n - written);
228
status = EXIT_FAILURE;
231
written += (size_t)ret;
153
// ret == 0 makes no other sence than to retry to read from stdin
155
if (errno != EINTR and not feof(stdin)){
236
if(errno != EINTR and not feof(stdin)){
156
237
perror("getline");
157
238
status = EXIT_FAILURE;
242
/* if(ret == 0), then the only sensible thing to do is to retry to
161
244
fputc('\n', stderr);
245
if(debug and quit_now == 0){
246
/* If quit_now is nonzero, we were interrupted by a signal, and
247
will print that later, so no need to show this too. */
248
fprintf(stderr, "getline() returned 0, retrying.\n");
165
255
fprintf(stderr, "Restoring terminal attributes\n");
167
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
257
if(tcsetattr(STDIN_FILENO, TCSAFLUSH, &t_old) != 0){
168
258
perror("tcsetattr+echo");
172
fprintf(stderr, "%s is exiting\n", argv[0]);
262
fprintf(stderr, "%s is exiting with status %d\n", argv[0],
265
if(status == EXIT_SUCCESS){