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- Committer: Teddy Hogeborn
- Date: 2008-08-01 06:56:27 UTC
- Revision ID: teddy@fukt.bsnet.se-20080801065627-2c7k4ydefjgacgnq
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
(main): Use the set_cloexec_flag function. Move inserting of global
arguments to before the fork.
(main): Use the set_cloexec_flag function. Move inserting of global
arguments to before the fork.
- files added:
- ca.pem
- files removed:
- mandos-client.xml
- files renamed:
- mandos-client.c => plugbasedclient.c
- plugins.d/password-request.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
plugbasedclient.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 <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() */
24
#include <stdio.h> /* popen(), fileno(), fprintf(),
25
stderr, STDOUT_FILENO */
42
26
#include <iso646.h> /* and, or, not */
27
#include <sys/types.h> /* DIR, opendir(), stat(), struct stat,
28
waitpid(), WIFEXITED(),
29
WEXITSTATUS(), wait() */
30
#include <sys/wait.h> /* wait() */
43
31
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
32
readdir(), closedir() */
33
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
45
34
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
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> /* strtok, strlen(), strcpy(),
55
strcat() */
35
fcntl() */
36
#include <fcntl.h> /* fcntl() */
37
#include <stddef.h> /* NULL */
38
#include <stdlib.h> /* EXIT_FAILURE */
39
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
40
FD_SET(), FD_ISSET() */
41
#include <string.h> /* strlen(), strcpy(), strcat() */
42
#include <stdbool.h> /* true */
43
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
44
WEXITSTATUS() */
56
45
#include <errno.h> /* errno */
57
#include <argp.h> /* struct argp_option, struct
58
argp_state, struct argp,
59
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
sigaddset(), sigaction(),
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
65
#include <errno.h> /* errno, EBADF */
66
67
#define BUFFER_SIZE 256
68
69
const char *argp_program_version = "plugbasedclient 1.0";
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
46
#include <argp.h> /* struct argp_option,
47
struct argp_state, struct argp,
48
argp_parse() */
71
49
72
50
struct process;
73
51
77
55
char *buffer;
78
56
size_t buffer_size;
79
57
size_t buffer_length;
80
bool eof;
81
bool completed;
82
int status;
83
58
struct process *next;
84
59
} process;
85
60
91
66
struct plugin *next;
92
67
} plugin;
93
68
94
static plugin *getplugin(char *name, plugin **plugin_list){
69
plugin *getplugin(char *name, plugin **plugin_list){
95
70
for (plugin *p = *plugin_list; p != NULL; p = p->next){
96
71
if ((p->name == name)
97
72
or (p->name and name and (strcmp(p->name, name) == 0))){
120
95
return new_plugin;
121
96
}
122
97
123
static void addargument(plugin *p, char *arg){
98
void addargument(plugin *p, char *arg){
124
99
p->argv[p->argc] = arg;
125
100
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
101
if (p->argv == NULL){
136
111
* Descriptor Flags".
137
112
* *Note File Descriptor Flags:(libc)Descriptor Flags.
138
113
*/
139
static int set_cloexec_flag(int fd)
114
int set_cloexec_flag(int fd)
140
115
{
141
116
int ret = fcntl(fd, F_GETFD, 0);
142
117
/* If reading the flags failed, return error indication now. */
147
122
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
148
123
}
149
124
150
process *process_list = NULL;
151
152
/* Mark a process as completed when it exits, and save its exit
153
status. */
154
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;
171
}
125
126
#define BUFFER_SIZE 256
127
128
const char *argp_program_version =
129
"plugbasedclient 0.9";
130
const char *argp_program_bug_address =
131
"<mandos@fukt.bsnet.se>";
172
132
173
133
int main(int argc, char *argv[]){
174
134
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
175
135
size_t d_name_len;
176
DIR *dir = NULL;
136
DIR *dir;
177
137
struct dirent *dirst;
178
138
struct stat st;
179
139
fd_set rfds_all;
180
140
int ret, maxfd = 0;
181
uid_t uid = 65534;
182
gid_t gid = 65534;
141
process *process_list = NULL;
183
142
bool debug = false;
184
143
int exitstatus = EXIT_SUCCESS;
185
struct sigaction old_sigchld_action;
186
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
187
.sa_flags = SA_NOCLDSTOP };
188
char *plus_options = NULL;
189
char **plus_argv = NULL;
190
191
/* Establish a signal handler */
192
sigemptyset(&sigchld_action.sa_mask);
193
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
194
if(ret < 0){
195
perror("sigaddset");
196
exit(EXIT_FAILURE);
197
}
198
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
199
if(ret < 0){
200
perror("sigaction");
201
exit(EXIT_FAILURE);
202
}
203
144
204
145
/* The options we understand. */
205
146
struct argp_option options[] = {
215
156
{ .name = "plugin-dir", .key = 128,
216
157
.arg = "DIRECTORY",
217
158
.doc = "Specify a different plugin directory", .group = 2 },
218
{ .name = "userid", .key = 129,
219
.arg = "ID", .flags = 0,
220
.doc = "User ID the plugins will run as", .group = 2 },
221
{ .name = "groupid", .key = 130,
222
.arg = "ID", .flags = 0,
223
.doc = "Group ID the plugins will run as", .group = 2 },
224
{ .name = "debug", .key = 131,
159
{ .name = "debug", .key = 129,
225
160
.doc = "Debug mode", .group = 3 },
226
161
{ .name = NULL }
227
162
};
228
163
229
164
error_t parse_opt (int key, char *arg, struct argp_state *state) {
230
/* Get the INPUT argument from `argp_parse', which we know is a
231
pointer to our plugin list pointer. */
165
/* Get the INPUT argument from `argp_parse', which we
166
know is a pointer to our plugin list pointer. */
232
167
plugin **plugins = state->input;
233
168
switch (key) {
234
169
case 'g':
237
172
do{
238
173
addargument(getplugin(NULL, plugins), p);
239
174
p = strtok(NULL, ",");
240
} while (p != NULL);
175
} while (p);
241
176
}
242
177
break;
243
178
case 'o':
244
179
if (arg != NULL){
245
180
char *name = strtok(arg, ":");
246
181
char *p = strtok(NULL, ":");
247
if(p != NULL){
182
if(p){
248
183
p = strtok(p, ",");
249
184
do{
250
185
addargument(getplugin(name, plugins), p);
251
186
p = strtok(NULL, ",");
252
} while (p != NULL);
187
} while (p);
253
188
}
254
189
}
255
190
break;
262
197
plugindir = arg;
263
198
break;
264
199
case 129:
265
uid = (uid_t)strtol(arg, NULL, 10);
266
break;
267
case 130:
268
gid = (gid_t)strtol(arg, NULL, 10);
269
break;
270
case 131:
271
200
debug = true;
272
201
break;
273
202
case ARGP_KEY_ARG:
274
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
275
argp_usage (state);
276
}
277
plus_options = arg;
203
argp_usage (state);
278
204
break;
279
205
case ARGP_KEY_END:
280
206
break;
287
213
plugin *plugin_list = NULL;
288
214
289
215
struct argp argp = { .options = options, .parser = parse_opt,
290
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
216
.args_doc = "",
291
217
.doc = "Mandos plugin runner -- Run plugins" };
292
218
293
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
294
if (ret == ARGP_ERR_UNKNOWN){
295
fprintf(stderr, "Unkown error while parsing arguments\n");
296
exitstatus = EXIT_FAILURE;
297
goto end;
298
}
299
300
if(plus_options){
301
/* This is a mangled argument in the form of
302
"+--option+--other-option=parameter+--yet-another-option", etc */
303
/* Make new argc and argv vars, and call argp_parse() again. */
304
plus_options++; /* skip the first '+' character */
305
const char delims[] = "+";
306
char *arg;
307
int new_argc = 1;
308
plus_argv = malloc(sizeof(char*) * 2);
309
if(plus_argv == NULL){
310
perror("malloc");
311
exitstatus = EXIT_FAILURE;
312
goto end;
313
}
314
plus_argv[0] = argv[0];
315
plus_argv[1] = NULL;
316
arg = strtok(plus_options, delims); /* Get first argument */
317
while(arg != NULL){
318
new_argc++;
319
plus_argv = realloc(plus_argv, sizeof(char *)
320
* ((unsigned int) new_argc + 1));
321
if(plus_argv == NULL){
322
perror("realloc");
323
exitstatus = EXIT_FAILURE;
324
goto end;
325
}
326
plus_argv[new_argc-1] = arg;
327
plus_argv[new_argc] = NULL;
328
arg = strtok(NULL, delims); /* Get next argument */
329
}
330
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
331
if (ret == ARGP_ERR_UNKNOWN){
332
fprintf(stderr, "Unkown error while parsing arguments\n");
333
exitstatus = EXIT_FAILURE;
334
goto end;
335
}
336
}
219
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
337
220
338
221
if(debug){
339
222
for(plugin *p = plugin_list; p != NULL; p=p->next){
345
228
}
346
229
}
347
230
348
ret = setuid(uid);
349
if (ret == -1){
350
perror("setuid");
351
}
352
353
setgid(gid);
354
if (ret == -1){
355
perror("setgid");
356
}
357
358
231
dir = opendir(plugindir);
232
/* Set the FD_CLOEXEC flag on the directory */
233
ret = set_cloexec_flag(dirfd(dir));
234
if(ret < 0){
235
perror("set_cloexec_flag");
236
goto end;
237
}
238
359
239
if(dir == NULL){
360
perror("Could not open plugin dir");
361
exitstatus = EXIT_FAILURE;
362
goto end;
363
}
364
365
/* Set the FD_CLOEXEC flag on the directory, if possible */
366
{
367
int dir_fd = dirfd(dir);
368
if(dir_fd >= 0){
369
ret = set_cloexec_flag(dir_fd);
370
if(ret < 0){
371
perror("set_cloexec_flag");
372
exitstatus = EXIT_FAILURE;
373
goto end;
374
}
375
}
240
fprintf(stderr, "Can not open directory\n");
241
return EXIT_FAILURE;
376
242
}
377
243
378
244
FD_ZERO(&rfds_all);
382
248
383
249
// All directory entries have been processed
384
250
if(dirst == NULL){
385
if (errno == EBADF){
386
perror("readdir");
387
exitstatus = EXIT_FAILURE;
388
goto end;
389
}
390
251
break;
391
252
}
392
253
406
267
if((d_name_len >= pre_len)
407
268
and strncmp((dirst->d_name), *pre, pre_len) == 0){
408
269
if(debug){
409
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
270
fprintf(stderr, "Ignoring plugin dir entry name \"%s\""
410
271
" with bad prefix %s\n", dirst->d_name, *pre);
411
272
}
412
273
bad_name = true;
424
285
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
425
286
== 0)){
426
287
if(debug){
427
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
288
fprintf(stderr, "Ignoring plugin dir entry name \"%s\""
428
289
" with bad suffix %s\n", dirst->d_name, *suf);
429
290
}
430
291
bad_name = true;
440
301
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
441
302
if (filename == NULL){
442
303
perror("malloc");
443
exitstatus = EXIT_FAILURE;
444
goto end;
445
}
446
strcpy(filename, plugindir); /* Spurious warning */
447
strcat(filename, "/"); /* Spurious warning */
448
strcat(filename, dirst->d_name); /* Spurious warning */
449
450
ret = stat(filename, &st);
451
if (ret == -1){
452
perror("stat");
453
exitstatus = EXIT_FAILURE;
454
goto end;
455
}
456
304
exitstatus =EXIT_FAILURE;
305
goto end;
306
}
307
strcpy(filename, plugindir);
308
strcat(filename, "/");
309
strcat(filename, dirst->d_name);
310
311
stat(filename, &st);
312
457
313
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
458
314
if(debug){
459
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
315
fprintf(stderr, "Ignoring plugin dir entry name \"%s\""
460
316
" with bad type or mode\n", filename);
461
317
}
462
free(filename);
463
318
continue;
464
319
}
465
320
if(getplugin(dirst->d_name, &plugin_list)->disabled){
466
321
if(debug){
467
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
322
fprintf(stderr, "Ignoring disabled plugin \"%s\"",
468
323
dirst->d_name);
469
324
}
470
free(filename);
471
325
continue;
472
326
}
327
// Starting a new process to be watched
328
int pipefd[2];
329
ret = pipe(pipefd);
330
if (ret == -1){
331
perror(argv[0]);
332
goto end;
333
}
473
334
plugin *p = getplugin(dirst->d_name, &plugin_list);
474
335
{
475
336
/* Add global arguments to argument list for this plugin */
478
339
addargument(p, *a);
479
340
}
480
341
}
481
int pipefd[2];
482
ret = pipe(pipefd);
483
if (ret == -1){
484
perror("pipe");
485
exitstatus = EXIT_FAILURE;
486
goto end;
487
}
488
ret = set_cloexec_flag(pipefd[0]);
489
if(ret < 0){
490
perror("set_cloexec_flag");
491
exitstatus = EXIT_FAILURE;
492
goto end;
493
}
494
ret = set_cloexec_flag(pipefd[1]);
495
if(ret < 0){
496
perror("set_cloexec_flag");
497
exitstatus = EXIT_FAILURE;
498
goto end;
499
}
500
/* Block SIGCHLD until process is safely in process list */
501
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
502
if(ret < 0){
503
perror("sigprocmask");
504
exitstatus = EXIT_FAILURE;
505
goto end;
506
}
507
// Starting a new process to be watched
508
342
pid_t pid = fork();
509
343
if(pid == 0){
510
344
/* this is the child process */
511
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
512
if(ret < 0){
513
perror("sigaction");
514
_exit(EXIT_FAILURE);
515
}
516
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
517
if(ret < 0){
518
perror("sigprocmask");
519
_exit(EXIT_FAILURE);
520
}
521
522
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
523
if(ret == -1){
524
perror("dup2");
525
_exit(EXIT_FAILURE);
526
}
345
closedir(dir);
346
close(pipefd[0]); /* close unused read end of pipe */
347
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
527
348
528
if(dirfd(dir) < 0){
529
/* If dir has no file descriptor, we could not set FD_CLOEXEC
530
above and must now close it manually here. */
531
closedir(dir);
532
}
533
349
if(execv(filename, p->argv) < 0){
534
perror("execv");
350
perror(argv[0]);
351
close(pipefd[1]);
535
352
_exit(EXIT_FAILURE);
536
353
}
537
354
/* no return */
538
355
}
539
/* parent process */
540
free(filename);
541
356
close(pipefd[1]); /* close unused write end of pipe */
542
357
process *new_process = malloc(sizeof(process));
543
358
if (new_process == NULL){
544
359
perror("malloc");
545
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
546
if(ret < 0){
547
perror("sigprocmask");
548
}
549
exitstatus = EXIT_FAILURE;
550
goto end;
551
}
552
553
*new_process = (struct process){ .pid = pid,
554
.fd = pipefd[0],
555
.next = process_list };
556
// List handling
557
process_list = new_process;
558
/* Unblock SIGCHLD so signal handler can be run if this process
559
has already completed */
560
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
561
if(ret < 0){
562
perror("sigprocmask");
563
exitstatus = EXIT_FAILURE;
564
goto end;
565
}
566
360
exitstatus = EXIT_FAILURE;
361
goto end;
362
}
363
364
new_process->fd = pipefd[0];
365
new_process->buffer = malloc(BUFFER_SIZE);
366
if (new_process->buffer == NULL){
367
perror("malloc");
368
exitstatus = EXIT_FAILURE;
369
goto end;
370
}
371
new_process->buffer_size = BUFFER_SIZE;
372
new_process->buffer_length = 0;
567
373
FD_SET(new_process->fd, &rfds_all);
568
374
569
375
if (maxfd < new_process->fd){
570
376
maxfd = new_process->fd;
571
377
}
572
378
573
}
574
575
/* Free the plugin list */
576
for(plugin *next; plugin_list != NULL; plugin_list = next){
577
next = plugin_list->next;
578
free(plugin_list->argv);
579
free(plugin_list);
379
//List handling
380
new_process->next = process_list;
381
process_list = new_process;
580
382
}
581
383
582
384
closedir(dir);
583
dir = NULL;
584
585
if (process_list == NULL){
586
fprintf(stderr, "No plugin processes started, exiting\n");
587
exitstatus = EXIT_FAILURE;
588
goto end;
589
}
590
while(process_list){
591
fd_set rfds = rfds_all;
592
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
593
if (select_ret == -1){
594
perror("select");
595
exitstatus = EXIT_FAILURE;
596
goto end;
597
}
598
/* OK, now either a process completed, or something can be read
599
from one of them */
600
for(process *proc = process_list; proc ; proc = proc->next){
601
/* Is this process completely done? */
602
if(proc->eof and proc->completed){
603
/* Only accept the plugin output if it exited cleanly */
604
if(not WIFEXITED(proc->status)
605
or WEXITSTATUS(proc->status) != 0){
606
/* Bad exit by plugin */
607
if(debug){
608
if(WIFEXITED(proc->status)){
609
fprintf(stderr, "Plugin %d exited with status %d\n",
610
proc->pid, WEXITSTATUS(proc->status));
611
} else if(WIFSIGNALED(proc->status)) {
612
fprintf(stderr, "Plugin %d killed by signal %d\n",
613
proc->pid, WTERMSIG(proc->status));
614
} else if(WCOREDUMP(proc->status)){
615
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
616
}
617
}
618
/* Remove the plugin */
619
FD_CLR(proc->fd, &rfds_all);
620
/* Block signal while modifying process_list */
621
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
622
if(ret < 0){
623
perror("sigprocmask");
624
exitstatus = EXIT_FAILURE;
625
goto end;
626
}
627
/* Delete this process entry from the list */
628
if(process_list == proc){
629
/* First one - simple */
630
process_list = proc->next;
631
} else {
632
/* Second one or later */
633
for(process *p = process_list; p != NULL; p = p->next){
634
if(p->next == proc){
635
p->next = proc->next;
636
break;
385
386
if (process_list != NULL){
387
while(true){
388
fd_set rfds = rfds_all;
389
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
390
if (select_ret == -1){
391
perror(argv[0]);
392
goto end;
393
}else{
394
for(process *process_itr = process_list; process_itr != NULL;
395
process_itr = process_itr->next){
396
if(FD_ISSET(process_itr->fd, &rfds)){
397
if(process_itr->buffer_length + BUFFER_SIZE
398
> process_itr->buffer_size){
399
process_itr->buffer = realloc(process_itr->buffer,
400
process_itr->buffer_size
401
+ (size_t) BUFFER_SIZE);
402
if (process_itr->buffer == NULL){
403
perror(argv[0]);
404
goto end;
405
}
406
process_itr->buffer_size += BUFFER_SIZE;
407
}
408
ret = read(process_itr->fd, process_itr->buffer
409
+ process_itr->buffer_length, BUFFER_SIZE);
410
if(ret < 0){
411
/* Read error from this process; ignore it */
412
continue;
413
}
414
process_itr->buffer_length += (size_t) ret;
415
if(ret == 0){
416
/* got EOF */
417
/* wait for process exit */
418
int status;
419
waitpid(process_itr->pid, &status, 0);
420
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
421
for(size_t written = 0;
422
written < process_itr->buffer_length;){
423
ret = write(STDOUT_FILENO,
424
process_itr->buffer + written,
425
process_itr->buffer_length - written);
426
if(ret < 0){
427
perror(argv[0]);
428
goto end;
429
}
430
written += (size_t)ret;
431
}
432
goto end;
433
} else {
434
FD_CLR(process_itr->fd, &rfds_all);
637
435
}
638
436
}
639
437
}
640
/* We are done modifying process list, so unblock signal */
641
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
642
NULL);
643
if(ret < 0){
644
perror("sigprocmask");
645
}
646
free(proc->buffer);
647
free(proc);
648
/* We deleted this process from the list, so we can't go
649
proc->next. Therefore, start over from the beginning of
650
the process list */
651
break;
652
}
653
/* This process exited nicely, so print its buffer */
654
for(size_t written = 0; written < proc->buffer_length;
655
written += (size_t)ret){
656
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
657
proc->buffer + written,
658
proc->buffer_length
659
- written));
660
if(ret < 0){
661
perror("write");
662
exitstatus = EXIT_FAILURE;
663
goto end;
664
}
665
}
666
goto end;
667
}
668
/* This process has not completed. Does it have any output? */
669
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
670
/* This process had nothing to say at this time */
671
continue;
672
}
673
/* Before reading, make the process' data buffer large enough */
674
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
675
proc->buffer = realloc(proc->buffer, proc->buffer_size
676
+ (size_t) BUFFER_SIZE);
677
if (proc->buffer == NULL){
678
perror("malloc");
679
exitstatus = EXIT_FAILURE;
680
goto end;
681
}
682
proc->buffer_size += BUFFER_SIZE;
683
}
684
/* Read from the process */
685
ret = read(proc->fd, proc->buffer + proc->buffer_length,
686
BUFFER_SIZE);
687
if(ret < 0){
688
/* Read error from this process; ignore the error */
689
continue;
690
}
691
if(ret == 0){
692
/* got EOF */
693
proc->eof = true;
694
} else {
695
proc->buffer_length += (size_t) ret;
438
}
696
439
}
697
440
}
698
441
}
699
if(process_list == NULL){
700
fprintf(stderr, "All plugin processes failed, exiting\n");
701
exitstatus = EXIT_FAILURE;
702
}
703
442
704
443
end:
705
/* Restore old signal handler */
706
sigaction(SIGCHLD, &old_sigchld_action, NULL);
707
708
free(plus_argv);
709
710
/* Free the plugin list */
711
for(plugin *next; plugin_list != NULL; plugin_list = next){
712
next = plugin_list->next;
713
free(plugin_list->argv);
714
free(plugin_list);
715
}
716
717
if(dir != NULL){
718
closedir(dir);
719
}
720
721
/* Free the process list and kill the processes */
722
for(process *next; process_list != NULL; process_list = next){
723
next = process_list->next;
724
close(process_list->fd);
725
ret = kill(process_list->pid, SIGTERM);
726
if(ret == -1 and errno != ESRCH){
727
/* set-uid proccesses migth not get closed */
728
perror("kill");
444
for(process *process_itr = process_list; process_itr != NULL;
445
process_itr = process_itr->next){
446
close(process_itr->fd);
447
kill(process_itr->pid, SIGTERM);
448
free(process_itr->buffer);
449
}
450
451
while(true){
452
int status;
453
ret = wait(&status);
454
if (ret == -1){
455
if(errno != ECHILD){
456
perror("wait");
457
}
458
break;
729
459
}
730
free(process_list->buffer);
731
free(process_list);
732
}
733
734
/* Wait for any remaining child processes to terminate */
735
do{
736
ret = wait(NULL);
737
} while(ret >= 0);
738
if(errno != ECHILD){
739
perror("wait");
740
}
741
460
}
742
461
return exitstatus;
743
462
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0