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- Committer: Teddy Hogeborn
- Date: 2008-08-19 23:44:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20080819234417-8dz5prw19ihrklx6
* Makefile (DOCBOOKTOMAN): Include all DocBook-to-manpage-related
commands here, and use it everywhere.
(mandos.8, mandos.conf.5): New; also depend on "mandos-options.xml".
* mandos-keygen.xml: Removed OVERVIEW entity. Add XInclude namespace.
(OVERVIEW): Changed to do <xi:include/>.
* mandos-options.xml (<simplesect>): Changed to a <section>.
([@id="address"]): Reordered sentences.
* mandos.conf.xml (OPTIONS): Removed illegal <arg> tags.
(EXAMPLE): Added empty example.
* mandos.xml (NETWORK PROTOCOL): Bug fix: Changed "1\r\en" back to
"1\r\n".
(CHECKING): Do not refer to the non-relevant mandos.conf(5) manual.
commands here, and use it everywhere.
(mandos.8, mandos.conf.5): New; also depend on "mandos-options.xml".
* mandos-keygen.xml: Removed OVERVIEW entity. Add XInclude namespace.
(OVERVIEW): Changed to do <xi:include/>.
* mandos-options.xml (<simplesect>): Changed to a <section>.
([@id="address"]): Reordered sentences.
* mandos.conf.xml (OPTIONS): Removed illegal <arg> tags.
(EXAMPLE): Added empty example.
* mandos.xml (NETWORK PROTOCOL): Bug fix: Changed "1\r\en" back to
"1\r\n".
(CHECKING): Do not refer to the non-relevant mandos.conf(5) manual.
- files added:
- COPYING
- files removed:
- ca.pem
- files renamed:
- server.py => mandos
- server.conf => mandos.conf
- plugbasedclient.c => plugin-runner.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- plugins.d/mandosclient.c => plugins.d/password-request.c
- 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
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
27
stderr, STDOUT_FILENO */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
26
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
29
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
36
dirfd() */
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
28
42
#include <iso646.h> /* and, or, not */
29
#include <sys/types.h> /* DIR, opendir(), stat(),
30
struct stat, waitpid(),
31
WIFEXITED(), WEXITSTATUS(),
32
wait() */
33
#include <sys/wait.h> /* wait() */
34
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
readdir(), closedir(), dirfd() */
37
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
38
fcntl() */
39
#include <fcntl.h> /* fcntl() */
40
#include <stddef.h> /* NULL */
41
#include <stdlib.h> /* EXIT_FAILURE */
42
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
43
FD_SET(), FD_ISSET() */
44
#include <string.h> /* strlen(), strcpy(), strcat() */
45
#include <stdbool.h> /* true */
46
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
47
WEXITSTATUS() */
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
close() */
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
48
55
#include <errno.h> /* errno */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
60
#include <signal.h> /* struct sigaction, sigemptyset(),
61
sigaddset(), sigaction(),
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
64
#include <errno.h> /* errno, EBADF */
65
66
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
69
const char *argp_program_version = "plugin-runner 1.0";
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
52
71
53
72
struct process;
54
73
68
87
char *name; /* can be NULL or any plugin name */
69
88
char **argv;
70
89
int argc;
90
char **environ;
91
int envc;
71
92
bool disabled;
72
93
struct plugin *next;
73
94
} plugin;
74
95
75
plugin *getplugin(char *name, plugin **plugin_list){
96
static plugin *getplugin(char *name, plugin **plugin_list){
76
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
77
98
if ((p->name == name)
78
99
or (p->name and name and (strcmp(p->name, name) == 0))){
82
103
/* Create a new plugin */
83
104
plugin *new_plugin = malloc(sizeof(plugin));
84
105
if (new_plugin == NULL){
85
perror("malloc");
86
exit(EXIT_FAILURE);
87
}
88
new_plugin->name = name;
106
return NULL;
107
}
108
char *copy_name = strdup(name);
109
if(copy_name == NULL){
110
return NULL;
111
}
112
113
*new_plugin = (plugin) { .name = copy_name,
114
.argc = 1,
115
.envc = 0,
116
.disabled = false,
117
.next = *plugin_list };
118
89
119
new_plugin->argv = malloc(sizeof(char *) * 2);
90
120
if (new_plugin->argv == NULL){
91
perror("malloc");
92
exit(EXIT_FAILURE);
121
free(new_plugin);
122
return NULL;
93
123
}
94
new_plugin->argv[0] = name;
124
new_plugin->argv[0] = copy_name;
95
125
new_plugin->argv[1] = NULL;
96
new_plugin->argc = 1;
97
new_plugin->disabled = false;
98
new_plugin->next = *plugin_list;
126
127
new_plugin->environ = malloc(sizeof(char *));
128
if(new_plugin->environ == NULL){
129
free(new_plugin->argv);
130
free(new_plugin);
131
return NULL;
132
}
133
new_plugin->environ[0] = NULL;
99
134
/* Append the new plugin to the list */
100
135
*plugin_list = new_plugin;
101
136
return new_plugin;
102
137
}
103
138
104
void addargument(plugin *p, char *arg){
105
p->argv[p->argc] = arg;
106
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
107
if (p->argv == NULL){
108
perror("malloc");
109
exit(EXIT_FAILURE);
110
}
111
p->argc++;
112
p->argv[p->argc] = NULL;
113
}
139
/* Helper function for add_argument and add_environment */
140
static bool add_to_char_array(const char *new, char ***array,
141
int *len){
142
/* Resize the pointed-to array to hold one more pointer */
143
*array = realloc(*array, sizeof(char *)
144
* (size_t) ((*len) + 2));
145
/* Malloc check */
146
if(*array == NULL){
147
return false;
148
}
149
/* Make a copy of the new string */
150
char *copy = strdup(new);
151
if(copy == NULL){
152
return false;
153
}
154
/* Insert the copy */
155
(*array)[*len] = copy;
156
(*len)++;
157
/* Add a new terminating NULL pointer to the last element */
158
(*array)[*len] = NULL;
159
return true;
160
}
161
162
/* Add to a plugin's argument vector */
163
static bool add_argument(plugin *p, const char *arg){
164
if(p == NULL){
165
return false;
166
}
167
return add_to_char_array(arg, &(p->argv), &(p->argc));
168
}
169
170
/* Add to a plugin's environment */
171
static bool add_environment(plugin *p, const char *def){
172
if(p == NULL){
173
return false;
174
}
175
return add_to_char_array(def, &(p->environ), &(p->envc));
176
}
177
114
178
115
179
/*
116
180
* Based on the example in the GNU LibC manual chapter 13.13 "File
117
181
* Descriptor Flags".
118
182
* *Note File Descriptor Flags:(libc)Descriptor Flags.
119
183
*/
120
int set_cloexec_flag(int fd)
184
static int set_cloexec_flag(int fd)
121
185
{
122
186
int ret = fcntl(fd, F_GETFD, 0);
123
187
/* If reading the flags failed, return error indication now. */
128
192
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
129
193
}
130
194
131
#define BUFFER_SIZE 256
132
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
136
195
process *process_list = NULL;
137
196
138
197
/* Mark a process as completed when it exits, and save its exit
141
200
process *proc = process_list;
142
201
int status;
143
202
pid_t pid = wait(&status);
203
if(pid == -1){
204
perror("wait");
205
return;
206
}
144
207
while(proc != NULL and proc->pid != pid){
145
proc = proc->next;
208
proc = proc->next;
146
209
}
147
210
if(proc == NULL){
148
211
/* Process not found in process list */
152
215
proc->completed = true;
153
216
}
154
217
218
bool print_out_password(const char *buffer, size_t length){
219
ssize_t ret;
220
if(length>0 and buffer[length-1] == '\n'){
221
length--;
222
}
223
for(size_t written = 0; written < length; written += (size_t)ret){
224
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
225
length - written));
226
if(ret < 0){
227
return false;
228
}
229
}
230
return true;
231
}
232
233
char **add_to_argv(char **argv, int *argc, char *arg){
234
if (argv == NULL){
235
*argc = 1;
236
argv = malloc(sizeof(char*) * 2);
237
if(argv == NULL){
238
return NULL;
239
}
240
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
241
argv[1] = NULL;
242
}
243
*argc += 1;
244
argv = realloc(argv, sizeof(char *)
245
* ((unsigned int) *argc + 1));
246
if(argv == NULL){
247
return NULL;
248
}
249
argv[*argc-1] = arg;
250
argv[*argc] = NULL;
251
return argv;
252
}
253
254
static void free_plugin_list(plugin *plugin_list){
255
for(plugin *next = plugin_list; plugin_list != NULL; plugin_list = next){
256
next = plugin_list->next;
257
free(plugin_list->name);
258
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
259
free(*arg);
260
}
261
free(plugin_list->argv);
262
for(char **env = plugin_list->environ; *env != NULL; env++){
263
free(*env);
264
}
265
free(plugin_list->environ);
266
free(plugin_list);
267
}
268
}
269
155
270
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
271
const char *plugindir = "/lib/mandos/plugins.d";
272
const char *argfile = ARGFILE;
273
FILE *conffp;
157
274
size_t d_name_len;
158
275
DIR *dir = NULL;
159
276
struct dirent *dirst;
167
284
struct sigaction old_sigchld_action;
168
285
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
169
286
.sa_flags = SA_NOCLDSTOP };
170
287
char **custom_argv = NULL;
288
int custom_argc = 0;
289
171
290
/* Establish a signal handler */
172
291
sigemptyset(&sigchld_action.sa_mask);
173
292
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
174
if(ret < 0){
293
if(ret == -1){
175
294
perror("sigaddset");
176
exit(EXIT_FAILURE);
295
exitstatus = EXIT_FAILURE;
296
goto fallback;
177
297
}
178
298
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
179
if(ret < 0){
299
if(ret == -1){
180
300
perror("sigaction");
181
exit(EXIT_FAILURE);
301
exitstatus = EXIT_FAILURE;
302
goto fallback;
182
303
}
183
304
184
305
/* The options we understand. */
186
307
{ .name = "global-options", .key = 'g',
187
308
.arg = "OPTION[,OPTION[,...]]",
188
309
.doc = "Options passed to all plugins" },
310
{ .name = "global-envs", .key = 'e',
311
.arg = "VAR=value",
312
.doc = "Environment variable passed to all plugins" },
189
313
{ .name = "options-for", .key = 'o',
190
314
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
191
315
.doc = "Options passed only to specified plugin" },
316
{ .name = "envs-for", .key = 'f',
317
.arg = "PLUGIN:ENV=value",
318
.doc = "Environment variable passed to specified plugin" },
192
319
{ .name = "disable", .key = 'd',
193
320
.arg = "PLUGIN",
194
321
.doc = "Disable a specific plugin", .group = 1 },
213
340
switch (key) {
214
341
case 'g':
215
342
if (arg != NULL){
216
char *p = strtok(arg, ",");
217
do{
218
addargument(getplugin(NULL, plugins), p);
219
p = strtok(NULL, ",");
220
} while (p);
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
}
221
367
}
222
368
break;
223
369
case 'o':
224
370
if (arg != NULL){
225
char *name = strtok(arg, ":");
226
char *p = strtok(NULL, ":");
227
if(p){
228
p = strtok(p, ",");
229
do{
230
addargument(getplugin(name, plugins), p);
231
p = strtok(NULL, ",");
232
} while (p);
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");
233
409
}
234
410
}
235
411
break;
236
412
case 'd':
237
413
if (arg != NULL){
238
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;
239
419
}
240
420
break;
241
421
case 128:
251
431
debug = true;
252
432
break;
253
433
case ARGP_KEY_ARG:
254
argp_usage (state);
434
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
255
435
break;
256
436
case ARGP_KEY_END:
257
437
break;
264
444
plugin *plugin_list = NULL;
265
445
266
446
struct argp argp = { .options = options, .parser = parse_opt,
267
.args_doc = "",
447
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
268
448
.doc = "Mandos plugin runner -- Run plugins" };
269
449
270
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
271
450
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
451
if (ret == ARGP_ERR_UNKNOWN){
452
fprintf(stderr, "Unknown error while parsing arguments\n");
453
exitstatus = EXIT_FAILURE;
454
goto fallback;
455
}
456
457
conffp = fopen(argfile, "r");
458
if(conffp != NULL){
459
char *org_line = NULL;
460
char *p, *arg, *new_arg, *line;
461
size_t size = 0;
462
ssize_t sret;
463
const char whitespace_delims[] = " \r\t\f\v\n";
464
const char comment_delim[] = "#";
465
466
while(true){
467
sret = getline(&org_line, &size, conffp);
468
if(sret == -1){
469
break;
470
}
471
472
line = org_line;
473
arg = strsep(&line, comment_delim);
474
while((p = strsep(&arg, whitespace_delims)) != NULL){
475
if(p[0] == '\0'){
476
continue;
477
}
478
new_arg = strdup(p);
479
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
480
if (custom_argv == NULL){
481
perror("add_to_argv");
482
exitstatus = EXIT_FAILURE;
483
goto fallback;
484
}
485
}
486
}
487
free(org_line);
488
} else{
489
/* Check for harmful errors and go to fallback. Other errors might
490
not affect opening plugins */
491
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
492
perror("fopen");
493
exitstatus = EXIT_FAILURE;
494
goto fallback;
495
}
496
}
497
498
if(custom_argv != NULL){
499
custom_argv[0] = argv[0];
500
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
501
if (ret == ARGP_ERR_UNKNOWN){
502
fprintf(stderr, "Unknown error while parsing arguments\n");
503
exitstatus = EXIT_FAILURE;
504
goto fallback;
505
}
506
}
507
272
508
if(debug){
273
509
for(plugin *p = plugin_list; p != NULL; p=p->next){
274
510
fprintf(stderr, "Plugin: %s has %d arguments\n",
276
512
for(char **a = p->argv; *a != NULL; a++){
277
513
fprintf(stderr, "\tArg: %s\n", *a);
278
514
}
515
fprintf(stderr, "...and %u environment variables\n", p->envc);
516
for(char **a = p->environ; *a != NULL; a++){
517
fprintf(stderr, "\t%s\n", *a);
518
}
279
519
}
280
520
}
281
521
282
522
ret = setuid(uid);
283
523
if (ret == -1){
284
524
perror("setuid");
286
526
287
527
setgid(gid);
288
528
if (ret == -1){
289
perror("setuid");
529
perror("setgid");
290
530
}
291
531
292
532
dir = opendir(plugindir);
293
533
if(dir == NULL){
294
534
perror("Could not open plugin dir");
295
535
exitstatus = EXIT_FAILURE;
296
goto end;
536
goto fallback;
297
537
}
298
538
299
539
/* Set the FD_CLOEXEC flag on the directory, if possible */
304
544
if(ret < 0){
305
545
perror("set_cloexec_flag");
306
546
exitstatus = EXIT_FAILURE;
307
goto end;
547
goto fallback;
308
548
}
309
549
}
310
550
}
316
556
317
557
// All directory entries have been processed
318
558
if(dirst == NULL){
559
if (errno == EBADF){
560
perror("readdir");
561
exitstatus = EXIT_FAILURE;
562
goto fallback;
563
}
319
564
break;
320
565
}
321
566
365
610
continue;
366
611
}
367
612
}
368
369
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
370
if (filename == NULL){
371
perror("malloc");
372
exitstatus = EXIT_FAILURE;
373
goto end;
374
}
375
strcpy(filename, plugindir); /* Spurious warning */
376
strcat(filename, "/"); /* Spurious warning */
377
strcat(filename, dirst->d_name); /* Spurious warning */
378
379
stat(filename, &st);
613
614
char *filename;
615
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
616
if(ret < 0){
617
perror("asprintf");
618
continue;
619
}
620
621
ret = stat(filename, &st);
622
if (ret == -1){
623
perror("stat");
624
free(filename);
625
continue;
626
}
380
627
381
628
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
382
629
if(debug){
386
633
free(filename);
387
634
continue;
388
635
}
389
if(getplugin(dirst->d_name, &plugin_list)->disabled){
636
plugin *p = getplugin(dirst->d_name, &plugin_list);
637
if(p == NULL){
638
perror("getplugin");
639
free(filename);
640
continue;
641
}
642
if(p->disabled){
390
643
if(debug){
391
644
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
392
645
dirst->d_name);
394
647
free(filename);
395
648
continue;
396
649
}
397
plugin *p = getplugin(dirst->d_name, &plugin_list);
398
650
{
399
651
/* Add global arguments to argument list for this plugin */
400
652
plugin *g = getplugin(NULL, &plugin_list);
401
for(char **a = g->argv + 1; *a != NULL; a++){
402
addargument(p, *a);
403
}
404
}
653
if(g != NULL){
654
for(char **a = g->argv + 1; *a != NULL; a++){
655
if(not add_argument(p, *a)){
656
perror("add_argument");
657
}
658
}
659
/* Add global environment variables */
660
for(char **e = g->environ; *e != NULL; e++){
661
if(not add_environment(p, *e)){
662
perror("add_environment");
663
}
664
}
665
}
666
}
667
/* If this plugin has any environment variables, we will call
668
using execve and need to duplicate the environment from this
669
process, too. */
670
if(p->environ[0] != NULL){
671
for(char **e = environ; *e != NULL; e++){
672
char *copy = strdup(*e);
673
if(copy == NULL){
674
perror("strdup");
675
continue;
676
}
677
if(not add_environment(p, copy)){
678
perror("add_environment");
679
}
680
}
681
}
682
405
683
int pipefd[2];
406
684
ret = pipe(pipefd);
407
685
if (ret == -1){
408
686
perror("pipe");
409
687
exitstatus = EXIT_FAILURE;
410
goto end;
688
goto fallback;
411
689
}
412
690
ret = set_cloexec_flag(pipefd[0]);
413
691
if(ret < 0){
414
692
perror("set_cloexec_flag");
415
693
exitstatus = EXIT_FAILURE;
416
goto end;
694
goto fallback;
417
695
}
418
696
ret = set_cloexec_flag(pipefd[1]);
419
697
if(ret < 0){
420
698
perror("set_cloexec_flag");
421
699
exitstatus = EXIT_FAILURE;
422
goto end;
700
goto fallback;
423
701
}
424
702
/* Block SIGCHLD until process is safely in process list */
425
703
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
426
704
if(ret < 0){
427
705
perror("sigprocmask");
428
706
exitstatus = EXIT_FAILURE;
429
goto end;
707
goto fallback;
430
708
}
431
709
// Starting a new process to be watched
432
710
pid_t pid = fork();
711
if(pid == -1){
712
perror("fork");
713
exitstatus = EXIT_FAILURE;
714
goto fallback;
715
}
433
716
if(pid == 0){
434
717
/* this is the child process */
435
718
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
442
725
perror("sigprocmask");
443
726
_exit(EXIT_FAILURE);
444
727
}
445
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
728
729
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
730
if(ret == -1){
731
perror("dup2");
732
_exit(EXIT_FAILURE);
733
}
446
734
447
735
if(dirfd(dir) < 0){
448
736
/* If dir has no file descriptor, we could not set FD_CLOEXEC
449
737
above and must now close it manually here. */
450
738
closedir(dir);
451
739
}
452
if(execv(filename, p->argv) < 0){
453
perror("execv");
454
_exit(EXIT_FAILURE);
740
if(p->environ[0] == NULL){
741
if(execv(filename, p->argv) < 0){
742
perror("execv");
743
_exit(EXIT_FAILURE);
744
}
745
} else {
746
if(execve(filename, p->argv, p->environ) < 0){
747
perror("execve");
748
_exit(EXIT_FAILURE);
749
}
455
750
}
456
751
/* no return */
457
752
}
466
761
perror("sigprocmask");
467
762
}
468
763
exitstatus = EXIT_FAILURE;
469
goto end;
764
goto fallback;
470
765
}
471
766
472
767
*new_process = (struct process){ .pid = pid,
480
775
if(ret < 0){
481
776
perror("sigprocmask");
482
777
exitstatus = EXIT_FAILURE;
483
goto end;
778
goto fallback;
484
779
}
485
780
486
781
FD_SET(new_process->fd, &rfds_all);
491
786
492
787
}
493
788
494
/* Free the plugin list */
495
for(plugin *next; plugin_list != NULL; plugin_list = next){
496
next = plugin_list->next;
497
free(plugin_list->argv);
498
free(plugin_list);
499
}
789
free_plugin_list(plugin_list);
500
790
501
791
closedir(dir);
502
792
dir = NULL;
503
793
504
794
if (process_list == NULL){
505
fprintf(stderr, "No plugin processes started, exiting\n");
506
exitstatus = EXIT_FAILURE;
507
goto end;
795
fprintf(stderr, "No plugin processes started. Incorrect plugin"
796
" directory?\n");
797
process_list = NULL;
508
798
}
509
799
while(process_list){
510
800
fd_set rfds = rfds_all;
512
802
if (select_ret == -1){
513
803
perror("select");
514
804
exitstatus = EXIT_FAILURE;
515
goto end;
805
goto fallback;
516
806
}
517
807
/* OK, now either a process completed, or something can be read
518
808
from one of them */
525
815
/* Bad exit by plugin */
526
816
if(debug){
527
817
if(WIFEXITED(proc->status)){
528
fprintf(stderr, "Plugin %d exited with status %d\n",
529
proc->pid, WEXITSTATUS(proc->status));
818
fprintf(stderr, "Plugin %u exited with status %d\n",
819
(unsigned int) (proc->pid),
820
WEXITSTATUS(proc->status));
530
821
} else if(WIFSIGNALED(proc->status)) {
531
fprintf(stderr, "Plugin %d killed by signal %d\n",
532
proc->pid, WTERMSIG(proc->status));
822
fprintf(stderr, "Plugin %u killed by signal %d\n",
823
(unsigned int) (proc->pid),
824
WTERMSIG(proc->status));
533
825
} else if(WCOREDUMP(proc->status)){
534
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
826
fprintf(stderr, "Plugin %d dumped core\n",
827
(unsigned int) (proc->pid));
535
828
}
536
829
}
537
830
/* Remove the plugin */
541
834
if(ret < 0){
542
835
perror("sigprocmask");
543
836
exitstatus = EXIT_FAILURE;
544
goto end;
837
goto fallback;
545
838
}
546
839
/* Delete this process entry from the list */
547
840
if(process_list == proc){
570
863
break;
571
864
}
572
865
/* This process exited nicely, so print its buffer */
573
for(size_t written = 0; written < proc->buffer_length;
574
written += (size_t)ret){
575
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
576
proc->buffer + written,
577
proc->buffer_length
578
- written));
579
if(ret < 0){
580
perror("write");
581
exitstatus = EXIT_FAILURE;
582
goto end;
583
}
866
867
bool bret = print_out_password(proc->buffer, proc->buffer_length);
868
if(not bret){
869
perror("print_out_password");
870
exitstatus = EXIT_FAILURE;
584
871
}
585
goto end;
872
goto fallback;
586
873
}
587
874
/* This process has not completed. Does it have any output? */
588
875
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
596
883
if (proc->buffer == NULL){
597
884
perror("malloc");
598
885
exitstatus = EXIT_FAILURE;
599
goto end;
886
goto fallback;
600
887
}
601
888
proc->buffer_size += BUFFER_SIZE;
602
889
}
615
902
}
616
903
}
617
904
}
618
if(process_list == NULL){
619
fprintf(stderr, "All plugin processes failed, exiting\n");
620
exitstatus = EXIT_FAILURE;
905
906
907
fallback:
908
909
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
910
/* Fallback if all plugins failed, none are found or an error occured */
911
bool bret;
912
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
913
char *passwordbuffer = getpass("Password: ");
914
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
915
if(not bret){
916
perror("print_out_password");
917
exitstatus = EXIT_FAILURE;
918
}
621
919
}
622
920
623
end:
624
921
/* Restore old signal handler */
625
sigaction(SIGCHLD, &old_sigchld_action, NULL);
626
627
/* Free the plugin list */
628
for(plugin *next; plugin_list != NULL; plugin_list = next){
629
next = plugin_list->next;
630
free(plugin_list->argv);
631
free(plugin_list);
632
}
922
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
923
if(ret == -1){
924
perror("sigaction");
925
exitstatus = EXIT_FAILURE;
926
}
927
928
if(custom_argv != NULL){
929
for(char **arg = custom_argv; *arg != NULL; arg++){
930
free(*arg);
931
}
932
free(custom_argv);
933
}
934
free_plugin_list(plugin_list);
633
935
634
936
if(dir != NULL){
635
937
closedir(dir);
639
941
for(process *next; process_list != NULL; process_list = next){
640
942
next = process_list->next;
641
943
close(process_list->fd);
642
kill(process_list->pid, SIGTERM);
944
ret = kill(process_list->pid, SIGTERM);
945
if(ret == -1 and errno != ESRCH){
946
/* set-uid proccesses migth not get closed */
947
perror("kill");
948
}
643
949
free(process_list->buffer);
644
950
free(process_list);
645
951
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0