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- Committer: Teddy Hogeborn
- Date: 2008-08-29 05:53:59 UTC
- Revision ID: teddy@fukt.bsnet.se-20080829055359-wkdasnyxtylmnxus
* mandos.xml (EXAMPLE): Replaced all occurences of command name with
"&COMMANDNAME;".
* plugins.d/password-prompt.c (main): Improved some documentation
strings. Do perror() of
tcgetattr() fails. Add debug
output if interrupted by signal.
Loop over write() instead of
using fwrite() when outputting
password. Add debug output if
getline() returns 0, unless it
was caused by a signal. Add
exit status code to debug
output.
* plugins.d/password-prompt.xml: Changed all single quotes to double
quotes for consistency. Removed
<?xml-stylesheet>.
(ENTITY TIMESTAMP): New. Automatically updated by Emacs time-stamp
by using Emacs local variables.
(/refentry/refentryinfo/title): Changed to "Mandos Manual".
(/refentry/refentryinfo/productname): Changed to "Mandos".
(/refentry/refentryinfo/date): New; set to "&TIMESTAMP;".
(/refentry/refentryinfo/copyright): Split copyright holders.
(/refentry/refnamediv/refpurpose): Improved wording.
(SYNOPSIS): Fix to use correct markup. Add short options.
(DESCRIPTION, OPTIONS): Improved wording.
(OPTIONS): Improved wording. Use more correct markup. Document
short options.
(EXIT STATUS): Add text.
(ENVIRONMENT): Document use of "cryptsource" and "crypttarget".
(FILES): REMOVED.
(BUGS): Add text.
(EXAMPLE): Added some examples.
(SECURITY): Added text.
(SEE ALSO): Remove reference to mandos(8). Add reference to
crypttab(5).
"&COMMANDNAME;".
* plugins.d/password-prompt.c (main): Improved some documentation
strings. Do perror() of
tcgetattr() fails. Add debug
output if interrupted by signal.
Loop over write() instead of
using fwrite() when outputting
password. Add debug output if
getline() returns 0, unless it
was caused by a signal. Add
exit status code to debug
output.
* plugins.d/password-prompt.xml: Changed all single quotes to double
quotes for consistency. Removed
<?xml-stylesheet>.
(ENTITY TIMESTAMP): New. Automatically updated by Emacs time-stamp
by using Emacs local variables.
(/refentry/refentryinfo/title): Changed to "Mandos Manual".
(/refentry/refentryinfo/productname): Changed to "Mandos".
(/refentry/refentryinfo/date): New; set to "&TIMESTAMP;".
(/refentry/refentryinfo/copyright): Split copyright holders.
(/refentry/refnamediv/refpurpose): Improved wording.
(SYNOPSIS): Fix to use correct markup. Add short options.
(DESCRIPTION, OPTIONS): Improved wording.
(OPTIONS): Improved wording. Use more correct markup. Document
short options.
(EXIT STATUS): Add text.
(ENVIRONMENT): Document use of "cryptsource" and "crypttarget".
(FILES): REMOVED.
(BUGS): Add text.
(EXAMPLE): Added some examples.
(SECURITY): Added text.
(SEE ALSO): Remove reference to mandos(8). Add reference to
crypttab(5).
- files added:
- .bzrignore
- files removed:
- network-protocol.txt
- files modified:
- Makefile
added
removed
plugin-runner.c
21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
22
*/
23
23
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
26
#include <stddef.h> /* size_t, NULL */
27
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
28
EXIT_SUCCESS, realloc() */
51
51
close() */
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
53
FD_CLOEXEC */
54
#include <string.h> /* strtok, strlen(), strcpy(),
55
strcat() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
55
#include <errno.h> /* errno */
57
56
#include <argp.h> /* struct argp_option, struct
58
57
argp_state, struct argp,
59
58
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
59
ARGP_KEY_END, ARGP_KEY_ARG,
60
error_t */
61
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
62
sigaddset(), sigaction(),
63
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
66
67
67
#define BUFFER_SIZE 256
68
68
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
69
72
const char *argp_program_version = "plugin-runner 1.0";
70
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
74
78
81
size_t buffer_size;
79
82
size_t buffer_length;
80
83
bool eof;
81
bool completed;
82
int status;
84
volatile bool completed;
85
volatile int status;
83
86
struct process *next;
84
87
} process;
85
88
87
90
char *name; /* can be NULL or any plugin name */
88
91
char **argv;
89
92
int argc;
93
char **environ;
94
int envc;
90
95
bool disabled;
91
96
struct plugin *next;
92
97
} plugin;
101
106
/* Create a new plugin */
102
107
plugin *new_plugin = malloc(sizeof(plugin));
103
108
if (new_plugin == NULL){
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
109
return NULL;
110
}
111
char *copy_name = NULL;
112
if(name != NULL){
113
copy_name = strdup(name);
114
if(copy_name == NULL){
115
return NULL;
116
}
117
}
118
119
*new_plugin = (plugin) { .name = copy_name,
120
.argc = 1,
121
.envc = 0,
122
.disabled = false,
123
.next = *plugin_list };
124
108
125
new_plugin->argv = malloc(sizeof(char *) * 2);
109
126
if (new_plugin->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
127
free(copy_name);
128
free(new_plugin);
129
return NULL;
112
130
}
113
new_plugin->argv[0] = name;
131
new_plugin->argv[0] = copy_name;
114
132
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
133
134
new_plugin->environ = malloc(sizeof(char *));
135
if(new_plugin->environ == NULL){
136
free(copy_name);
137
free(new_plugin->argv);
138
free(new_plugin);
139
return NULL;
140
}
141
new_plugin->environ[0] = NULL;
118
142
/* Append the new plugin to the list */
119
143
*plugin_list = new_plugin;
120
144
return new_plugin;
121
145
}
122
146
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
132
}
147
/* Helper function for add_argument and add_environment */
148
static bool add_to_char_array(const char *new, char ***array,
149
int *len){
150
/* Resize the pointed-to array to hold one more pointer */
151
*array = realloc(*array, sizeof(char *)
152
* (size_t) ((*len) + 2));
153
/* Malloc check */
154
if(*array == NULL){
155
return false;
156
}
157
/* Make a copy of the new string */
158
char *copy = strdup(new);
159
if(copy == NULL){
160
return false;
161
}
162
/* Insert the copy */
163
(*array)[*len] = copy;
164
(*len)++;
165
/* Add a new terminating NULL pointer to the last element */
166
(*array)[*len] = NULL;
167
return true;
168
}
169
170
/* Add to a plugin's argument vector */
171
static bool add_argument(plugin *p, const char *arg){
172
if(p == NULL){
173
return false;
174
}
175
return add_to_char_array(arg, &(p->argv), &(p->argc));
176
}
177
178
/* Add to a plugin's environment */
179
static bool add_environment(plugin *p, const char *def){
180
if(p == NULL){
181
return false;
182
}
183
return add_to_char_array(def, &(p->environ), &(p->envc));
184
}
185
133
186
134
187
/*
135
188
* Based on the example in the GNU LibC manual chapter 13.13 "File
149
202
150
203
process *process_list = NULL;
151
204
152
/* Mark a process as completed when it exits, and save its exit
205
/* Mark processes as completed when they exit, and save their exit
153
206
status. */
154
207
void handle_sigchld(__attribute__((unused)) int sig){
155
process *proc = process_list;
156
int status;
157
pid_t pid = wait(&status);
158
if(pid == -1){
159
perror("wait");
160
return;
161
}
162
while(proc != NULL and proc->pid != pid){
163
proc = proc->next;
164
}
165
if(proc == NULL){
166
/* Process not found in process list */
167
return;
168
}
169
proc->status = status;
170
proc->completed = true;
208
while(true){
209
process *proc = process_list;
210
int status;
211
pid_t pid = waitpid(-1, &status, WNOHANG);
212
if(pid == 0){
213
/* Only still running child processes */
214
break;
215
}
216
if(pid == -1){
217
if (errno != ECHILD){
218
perror("waitpid");
219
}
220
/* No child processes */
221
break;
222
}
223
224
/* A child exited, find it in process_list */
225
while(proc != NULL and proc->pid != pid){
226
proc = proc->next;
227
}
228
if(proc == NULL){
229
/* Process not found in process list */
230
continue;
231
}
232
proc->status = status;
233
proc->completed = true;
234
}
171
235
}
172
236
173
237
bool print_out_password(const char *buffer, size_t length){
185
249
return true;
186
250
}
187
251
252
static void free_plugin_list(plugin *plugin_list){
253
for(plugin *next; plugin_list != NULL; plugin_list = next){
254
next = plugin_list->next;
255
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
256
free(*arg);
257
}
258
free(plugin_list->argv);
259
for(char **env = plugin_list->environ; *env != NULL; env++){
260
free(*env);
261
}
262
free(plugin_list->environ);
263
free(plugin_list);
264
}
265
}
266
188
267
int main(int argc, char *argv[]){
189
const char *plugindir = "/lib/mandos/plugins.d";
268
char *plugindir = NULL;
269
char *argfile = NULL;
270
FILE *conffp;
190
271
size_t d_name_len;
191
272
DIR *dir = NULL;
192
273
struct dirent *dirst;
200
281
struct sigaction old_sigchld_action;
201
282
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
202
283
.sa_flags = SA_NOCLDSTOP };
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
205
284
char **custom_argv = NULL;
285
int custom_argc = 0;
286
206
287
/* Establish a signal handler */
207
288
sigemptyset(&sigchld_action.sa_mask);
208
289
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
209
if(ret < 0){
290
if(ret == -1){
210
291
perror("sigaddset");
211
exit(EXIT_FAILURE);
292
exitstatus = EXIT_FAILURE;
293
goto fallback;
212
294
}
213
295
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
214
if(ret < 0){
296
if(ret == -1){
215
297
perror("sigaction");
216
exit(EXIT_FAILURE);
298
exitstatus = EXIT_FAILURE;
299
goto fallback;
217
300
}
218
301
219
302
/* The options we understand. */
221
304
{ .name = "global-options", .key = 'g',
222
305
.arg = "OPTION[,OPTION[,...]]",
223
306
.doc = "Options passed to all plugins" },
307
{ .name = "global-envs", .key = 'e',
308
.arg = "VAR=value",
309
.doc = "Environment variable passed to all plugins" },
224
310
{ .name = "options-for", .key = 'o',
225
311
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
226
312
.doc = "Options passed only to specified plugin" },
313
{ .name = "envs-for", .key = 'f',
314
.arg = "PLUGIN:ENV=value",
315
.doc = "Environment variable passed to specified plugin" },
227
316
{ .name = "disable", .key = 'd',
228
317
.arg = "PLUGIN",
229
318
.doc = "Disable a specific plugin", .group = 1 },
230
319
{ .name = "plugin-dir", .key = 128,
231
320
.arg = "DIRECTORY",
232
321
.doc = "Specify a different plugin directory", .group = 2 },
233
{ .name = "userid", .key = 129,
234
.arg = "ID", .flags = 0,
235
.doc = "User ID the plugins will run as", .group = 2 },
236
{ .name = "groupid", .key = 130,
237
.arg = "ID", .flags = 0,
238
.doc = "Group ID the plugins will run as", .group = 2 },
239
{ .name = "debug", .key = 131,
240
.doc = "Debug mode", .group = 3 },
322
{ .name = "config-file", .key = 129,
323
.arg = "FILE",
324
.doc = "Specify a different configuration file", .group = 2 },
325
{ .name = "userid", .key = 130,
326
.arg = "ID", .flags = 0,
327
.doc = "User ID the plugins will run as", .group = 3 },
328
{ .name = "groupid", .key = 131,
329
.arg = "ID", .flags = 0,
330
.doc = "Group ID the plugins will run as", .group = 3 },
331
{ .name = "debug", .key = 132,
332
.doc = "Debug mode", .group = 4 },
241
333
{ .name = NULL }
242
334
};
243
335
248
340
switch (key) {
249
341
case 'g':
250
342
if (arg != NULL){
251
char *p = strtok(arg, ",");
252
do{
253
addargument(getplugin(NULL, plugins), p);
254
p = strtok(NULL, ",");
255
} while (p != NULL);
343
char *p;
344
while((p = strsep(&arg, ",")) != NULL){
345
if(p[0] == '\0'){
346
continue;
347
}
348
if(not add_argument(getplugin(NULL, plugins), p)){
349
perror("add_argument");
350
return ARGP_ERR_UNKNOWN;
351
}
352
}
353
}
354
break;
355
case 'e':
356
if(arg == NULL){
357
break;
358
}
359
{
360
char *envdef = strdup(arg);
361
if(envdef == NULL){
362
break;
363
}
364
if(not add_environment(getplugin(NULL, plugins), envdef)){
365
perror("add_environment");
366
}
256
367
}
257
368
break;
258
369
case 'o':
259
370
if (arg != NULL){
260
char *name = strtok(arg, ":");
261
char *p = strtok(NULL, ":");
262
if(p != NULL){
263
p = strtok(p, ",");
264
do{
265
addargument(getplugin(name, plugins), p);
266
p = strtok(NULL, ",");
267
} while (p != NULL);
371
char *p_name = strsep(&arg, ":");
372
if(p_name[0] == '\0'){
373
break;
374
}
375
char *opt = strsep(&arg, ":");
376
if(opt[0] == '\0'){
377
break;
378
}
379
if(opt != NULL){
380
char *p;
381
while((p = strsep(&opt, ",")) != NULL){
382
if(p[0] == '\0'){
383
continue;
384
}
385
if(not add_argument(getplugin(p_name, plugins), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
388
}
389
}
390
}
391
}
392
break;
393
case 'f':
394
if(arg == NULL){
395
break;
396
}
397
{
398
char *envdef = strchr(arg, ':');
399
if(envdef == NULL){
400
break;
401
}
402
char *p_name = strndup(arg, (size_t) (envdef-arg));
403
if(p_name == NULL){
404
break;
405
}
406
envdef++;
407
if(not add_environment(getplugin(p_name, plugins), envdef)){
408
perror("add_environment");
268
409
}
269
410
}
270
411
break;
271
412
case 'd':
272
413
if (arg != NULL){
273
getplugin(arg, plugins)->disabled = true;
414
plugin *p = getplugin(arg, plugins);
415
if(p == NULL){
416
return ARGP_ERR_UNKNOWN;
417
}
418
p->disabled = true;
274
419
}
275
420
break;
276
421
case 128:
277
plugindir = arg;
422
plugindir = strdup(arg);
423
if(plugindir == NULL){
424
perror("strdup");
425
}
278
426
break;
279
427
case 129:
428
argfile = strdup(arg);
429
if(argfile == NULL){
430
perror("strdup");
431
}
432
break;
433
case 130:
280
434
uid = (uid_t)strtol(arg, NULL, 10);
281
435
break;
282
case 130:
436
case 131:
283
437
gid = (gid_t)strtol(arg, NULL, 10);
284
438
break;
285
case 131:
439
case 132:
286
440
debug = true;
287
441
break;
288
442
case ARGP_KEY_ARG:
289
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
290
argp_usage (state);
291
}
292
plus_options = arg;
443
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
293
444
break;
294
445
case ARGP_KEY_END:
295
446
break;
309
460
if (ret == ARGP_ERR_UNKNOWN){
310
461
fprintf(stderr, "Unknown error while parsing arguments\n");
311
462
exitstatus = EXIT_FAILURE;
312
goto end;
463
goto fallback;
464
}
465
466
if (argfile == NULL){
467
conffp = fopen(AFILE, "r");
468
} else {
469
conffp = fopen(argfile, "r");
313
470
}
314
471
315
if(plus_options){
316
/* This is a mangled argument in the form of
317
"+--option+--other-option=parameter+--yet-another-option", etc */
318
/* Make new argc and argv vars, and call argp_parse() again. */
319
plus_options++; /* skip the first '+' character */
320
const char delims[] = "+";
321
char *arg;
322
int new_argc = 1;
323
plus_argv = malloc(sizeof(char*) * 2);
324
if(plus_argv == NULL){
472
if(conffp != NULL){
473
char *org_line = NULL;
474
char *p, *arg, *new_arg, *line;
475
size_t size = 0;
476
ssize_t sret;
477
const char whitespace_delims[] = " \r\t\f\v\n";
478
const char comment_delim[] = "#";
479
480
custom_argc = 1;
481
custom_argv = malloc(sizeof(char*) * 2);
482
if(custom_argv == NULL){
325
483
perror("malloc");
326
484
exitstatus = EXIT_FAILURE;
327
goto end;
328
}
329
plus_argv[0] = argv[0];
330
plus_argv[1] = NULL;
331
arg = strtok(plus_options, delims); /* Get first argument */
332
while(arg != NULL){
333
new_argc++;
334
plus_argv = realloc(plus_argv, sizeof(char *)
335
* ((unsigned int) new_argc + 1));
336
if(plus_argv == NULL){
337
perror("realloc");
338
exitstatus = EXIT_FAILURE;
339
goto end;
340
}
341
plus_argv[new_argc-1] = arg;
342
plus_argv[new_argc] = NULL;
343
arg = strtok(NULL, delims); /* Get next argument */
344
}
345
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
485
goto fallback;
486
}
487
custom_argv[0] = argv[0];
488
custom_argv[1] = NULL;
489
490
while(true){
491
sret = getline(&org_line, &size, conffp);
492
if(sret == -1){
493
break;
494
}
495
496
line = org_line;
497
arg = strsep(&line, comment_delim);
498
while((p = strsep(&arg, whitespace_delims)) != NULL){
499
if(p[0] == '\0'){
500
continue;
501
}
502
new_arg = strdup(p);
503
if(new_arg == NULL){
504
perror("strdup");
505
exitstatus = EXIT_FAILURE;
506
free(org_line);
507
goto fallback;
508
}
509
510
custom_argc += 1;
511
custom_argv = realloc(custom_argv, sizeof(char *)
512
* ((unsigned int) custom_argc + 1));
513
if(custom_argv == NULL){
514
perror("realloc");
515
exitstatus = EXIT_FAILURE;
516
free(org_line);
517
goto fallback;
518
}
519
custom_argv[custom_argc-1] = new_arg;
520
custom_argv[custom_argc] = NULL;
521
}
522
}
523
free(org_line);
524
} else{
525
/* Check for harmful errors and go to fallback. Other errors might
526
not affect opening plugins */
527
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
528
perror("fopen");
529
exitstatus = EXIT_FAILURE;
530
goto fallback;
531
}
532
}
533
534
if(custom_argv != NULL){
535
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
346
536
if (ret == ARGP_ERR_UNKNOWN){
347
537
fprintf(stderr, "Unknown error while parsing arguments\n");
348
538
exitstatus = EXIT_FAILURE;
349
goto end;
539
goto fallback;
350
540
}
351
541
}
352
542
357
547
for(char **a = p->argv; *a != NULL; a++){
358
548
fprintf(stderr, "\tArg: %s\n", *a);
359
549
}
550
fprintf(stderr, "...and %u environment variables\n", p->envc);
551
for(char **a = p->environ; *a != NULL; a++){
552
fprintf(stderr, "\t%s\n", *a);
553
}
360
554
}
361
555
}
362
556
369
563
if (ret == -1){
370
564
perror("setgid");
371
565
}
566
567
if (plugindir == NULL){
568
dir = opendir(PDIR);
569
} else {
570
dir = opendir(plugindir);
571
}
372
572
373
dir = opendir(plugindir);
374
573
if(dir == NULL){
375
574
perror("Could not open plugin dir");
376
575
exitstatus = EXIT_FAILURE;
377
goto end;
576
goto fallback;
378
577
}
379
578
380
579
/* Set the FD_CLOEXEC flag on the directory, if possible */
385
584
if(ret < 0){
386
585
perror("set_cloexec_flag");
387
586
exitstatus = EXIT_FAILURE;
388
goto end;
587
goto fallback;
389
588
}
390
589
}
391
590
}
400
599
if (errno == EBADF){
401
600
perror("readdir");
402
601
exitstatus = EXIT_FAILURE;
403
goto end;
602
goto fallback;
404
603
}
405
604
break;
406
605
}
451
650
continue;
452
651
}
453
652
}
454
455
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
456
if (filename == NULL){
457
perror("malloc");
653
654
char *filename;
655
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
656
if(ret < 0){
657
perror("asprintf");
458
658
continue;
459
659
}
460
strcpy(filename, plugindir); /* Spurious warning */
461
strcat(filename, "/"); /* Spurious warning */
462
strcat(filename, dirst->d_name); /* Spurious warning */
463
660
464
661
ret = stat(filename, &st);
465
662
if (ret == -1){
476
673
free(filename);
477
674
continue;
478
675
}
479
if(getplugin(dirst->d_name, &plugin_list)->disabled){
676
plugin *p = getplugin(dirst->d_name, &plugin_list);
677
if(p == NULL){
678
perror("getplugin");
679
free(filename);
680
continue;
681
}
682
if(p->disabled){
480
683
if(debug){
481
684
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
482
685
dirst->d_name);
484
687
free(filename);
485
688
continue;
486
689
}
487
plugin *p = getplugin(dirst->d_name, &plugin_list);
488
690
{
489
691
/* Add global arguments to argument list for this plugin */
490
692
plugin *g = getplugin(NULL, &plugin_list);
491
for(char **a = g->argv + 1; *a != NULL; a++){
492
addargument(p, *a);
493
}
494
}
495
int pipefd[2];
693
if(g != NULL){
694
for(char **a = g->argv + 1; *a != NULL; a++){
695
if(not add_argument(p, *a)){
696
perror("add_argument");
697
}
698
}
699
/* Add global environment variables */
700
for(char **e = g->environ; *e != NULL; e++){
701
if(not add_environment(p, *e)){
702
perror("add_environment");
703
}
704
}
705
}
706
}
707
/* If this plugin has any environment variables, we will call
708
using execve and need to duplicate the environment from this
709
process, too. */
710
if(p->environ[0] != NULL){
711
for(char **e = environ; *e != NULL; e++){
712
char *copy = strdup(*e);
713
if(copy == NULL){
714
perror("strdup");
715
continue;
716
}
717
if(not add_environment(p, copy)){
718
perror("add_environment");
719
}
720
}
721
}
722
723
int pipefd[2];
496
724
ret = pipe(pipefd);
497
725
if (ret == -1){
498
726
perror("pipe");
499
727
exitstatus = EXIT_FAILURE;
500
goto end;
728
goto fallback;
501
729
}
502
730
ret = set_cloexec_flag(pipefd[0]);
503
731
if(ret < 0){
504
732
perror("set_cloexec_flag");
505
733
exitstatus = EXIT_FAILURE;
506
goto end;
734
goto fallback;
507
735
}
508
736
ret = set_cloexec_flag(pipefd[1]);
509
737
if(ret < 0){
510
738
perror("set_cloexec_flag");
511
739
exitstatus = EXIT_FAILURE;
512
goto end;
740
goto fallback;
513
741
}
514
742
/* Block SIGCHLD until process is safely in process list */
515
743
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
516
744
if(ret < 0){
517
745
perror("sigprocmask");
518
746
exitstatus = EXIT_FAILURE;
519
goto end;
747
goto fallback;
520
748
}
521
749
// Starting a new process to be watched
522
750
pid_t pid = fork();
523
751
if(pid == -1){
524
752
perror("fork");
525
753
exitstatus = EXIT_FAILURE;
526
goto end;
754
goto fallback;
527
755
}
528
756
if(pid == 0){
529
757
/* this is the child process */
549
777
above and must now close it manually here. */
550
778
closedir(dir);
551
779
}
552
if(execv(filename, p->argv) < 0){
553
perror("execv");
554
_exit(EXIT_FAILURE);
780
if(p->environ[0] == NULL){
781
if(execv(filename, p->argv) < 0){
782
perror("execv");
783
_exit(EXIT_FAILURE);
784
}
785
} else {
786
if(execve(filename, p->argv, p->environ) < 0){
787
perror("execve");
788
_exit(EXIT_FAILURE);
789
}
555
790
}
556
791
/* no return */
557
792
}
566
801
perror("sigprocmask");
567
802
}
568
803
exitstatus = EXIT_FAILURE;
569
goto end;
804
goto fallback;
570
805
}
571
806
572
807
*new_process = (struct process){ .pid = pid,
580
815
if(ret < 0){
581
816
perror("sigprocmask");
582
817
exitstatus = EXIT_FAILURE;
583
goto end;
818
goto fallback;
584
819
}
585
820
586
821
FD_SET(new_process->fd, &rfds_all);
590
825
}
591
826
592
827
}
593
594
/* Free the plugin list */
595
for(plugin *next; plugin_list != NULL; plugin_list = next){
596
next = plugin_list->next;
597
free(plugin_list->argv);
598
free(plugin_list);
599
}
828
829
free_plugin_list(plugin_list);
830
plugin_list = NULL;
600
831
601
832
closedir(dir);
602
833
dir = NULL;
612
843
if (select_ret == -1){
613
844
perror("select");
614
845
exitstatus = EXIT_FAILURE;
615
goto end;
846
goto fallback;
616
847
}
617
848
/* OK, now either a process completed, or something can be read
618
849
from one of them */
640
871
/* Remove the plugin */
641
872
FD_CLR(proc->fd, &rfds_all);
642
873
/* Block signal while modifying process_list */
643
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
874
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
644
875
if(ret < 0){
645
876
perror("sigprocmask");
646
877
exitstatus = EXIT_FAILURE;
647
goto end;
878
goto fallback;
648
879
}
649
880
/* Delete this process entry from the list */
650
881
if(process_list == proc){
674
905
}
675
906
/* This process exited nicely, so print its buffer */
676
907
677
bool bret = print_out_password(proc->buffer, proc->buffer_length);
908
bool bret = print_out_password(proc->buffer,
909
proc->buffer_length);
678
910
if(not bret){
679
911
perror("print_out_password");
680
912
exitstatus = EXIT_FAILURE;
681
913
}
682
goto end;
914
goto fallback;
683
915
}
684
916
/* This process has not completed. Does it have any output? */
685
917
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
693
925
if (proc->buffer == NULL){
694
926
perror("malloc");
695
927
exitstatus = EXIT_FAILURE;
696
goto end;
928
goto fallback;
697
929
}
698
930
proc->buffer_size += BUFFER_SIZE;
699
931
}
714
946
}
715
947
716
948
717
end:
949
fallback:
718
950
719
951
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
720
/* Fallback if all plugins failed, none are found or an error occured */
952
/* Fallback if all plugins failed, none are found or an error
953
occured */
721
954
bool bret;
722
955
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
723
956
char *passwordbuffer = getpass("Password: ");
725
958
if(not bret){
726
959
perror("print_out_password");
727
960
exitstatus = EXIT_FAILURE;
728
goto end;
729
961
}
730
962
}
731
963
732
964
/* Restore old signal handler */
733
sigaction(SIGCHLD, &old_sigchld_action, NULL);
734
735
free(plus_argv);
736
737
/* Free the plugin list */
738
for(plugin *next; plugin_list != NULL; plugin_list = next){
739
next = plugin_list->next;
740
free(plugin_list->argv);
741
free(plugin_list);
742
}
965
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
966
if(ret == -1){
967
perror("sigaction");
968
exitstatus = EXIT_FAILURE;
969
}
970
971
if(custom_argv != NULL){
972
for(char **arg = custom_argv+1; *arg != NULL; arg++){
973
free(*arg);
974
}
975
free(custom_argv);
976
}
977
free_plugin_list(plugin_list);
743
978
744
979
if(dir != NULL){
745
980
closedir(dir);
765
1000
if(errno != ECHILD){
766
1001
perror("wait");
767
1002
}
1003
1004
free(plugindir);
1005
free(argfile);
768
1006
769
1007
return exitstatus;
770
1008
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0