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- Committer: Teddy Hogeborn
- Date: 2008-07-21 02:33:00 UTC
- Revision ID: teddy@fukt.bsnet.se-20080721023300-c4t0cq7sxit973py
* plugins.d/Makefile: Removed
* plugins.d/mandosclient.c (start_mandos_communcation): Bug fix: write
server IP
address to
"to" struct.
* plugins.d/mandosclient.c (start_mandos_communcation): Bug fix: write
server IP
address to
"to" struct.
- files removed:
- server.conf
- files renamed:
- clients.conf => mandos-clients.conf
- files modified:
- Makefile
added
removed
plugbasedclient.c
1
/* -*- coding: utf-8 -*- */
2
/*
3
* Mandos plugin runner - Run Mandos plugins
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
6
*
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
11
*
12
* This program is distributed in the hope that it will be useful, but
13
* WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* General Public License for more details.
16
*
17
* You should have received a copy of the GNU General Public License
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
20
*
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
*/
23
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
27
stderr, STDOUT_FILENO */
28
#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
#include <dirent.h> /* DIR, struct dirent, opendir(),
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
37
#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() */
48
#include <errno.h> /* errno */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
1
#include <stdio.h> /* popen, fileno */
2
#include <iso646.h> /* and, or, not */
3
#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
4
WIFEXITED, WEXITSTATUS, wait */
5
#include <sys/wait.h> /* wait */
6
#include <dirent.h> /* DIR, opendir */
7
#include <sys/stat.h> /* stat, struct stat */
8
#include <unistd.h> /* stat, struct stat, chdir */
9
#include <stdlib.h> /* EXIT_FAILURE */
10
#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET, FD_ISSET */
11
#include <string.h> /* strlen, strcpy, strcat */
12
#include <stdbool.h> /* true */
13
#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
14
#include <errno.h> /* errno */
52
15
53
16
struct process;
54
17
56
19
pid_t pid;
57
20
int fd;
58
21
char *buffer;
59
size_t buffer_size;
60
size_t buffer_length;
61
bool eof;
62
bool completed;
63
int status;
22
int buffer_size;
23
int buffer_length;
64
24
struct process *next;
65
25
} process;
66
26
67
typedef struct plugin{
68
char *name; /* can be NULL or any plugin name */
69
char **argv;
70
int argc;
71
bool disabled;
72
struct plugin *next;
73
} plugin;
74
75
plugin *getplugin(char *name, plugin **plugin_list){
76
for (plugin *p = *plugin_list; p != NULL; p = p->next){
77
if ((p->name == name)
78
or (p->name and name and (strcmp(p->name, name) == 0))){
79
return p;
80
}
81
}
82
/* Create a new plugin */
83
plugin *new_plugin = malloc(sizeof(plugin));
84
if (new_plugin == NULL){
85
perror("malloc");
86
exit(EXIT_FAILURE);
87
}
88
new_plugin->name = name;
89
new_plugin->argv = malloc(sizeof(char *) * 2);
90
if (new_plugin->argv == NULL){
91
perror("malloc");
92
exit(EXIT_FAILURE);
93
}
94
new_plugin->argv[0] = name;
95
new_plugin->argv[1] = NULL;
96
new_plugin->argc = 1;
97
new_plugin->disabled = false;
98
new_plugin->next = *plugin_list;
99
/* Append the new plugin to the list */
100
*plugin_list = new_plugin;
101
return new_plugin;
102
}
103
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
}
114
115
/*
116
* Based on the example in the GNU LibC manual chapter 13.13 "File
117
* Descriptor Flags".
118
* *Note File Descriptor Flags:(libc)Descriptor Flags.
119
*/
120
int set_cloexec_flag(int fd)
121
{
122
int ret = fcntl(fd, F_GETFD, 0);
123
/* If reading the flags failed, return error indication now. */
124
if(ret < 0){
125
return ret;
126
}
127
/* Store modified flag word in the descriptor. */
128
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
129
}
130
131
27
#define BUFFER_SIZE 256
132
28
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
136
process *process_list = NULL;
137
138
/* Mark a process as completed when it exits, and save its exit
139
status. */
140
void handle_sigchld(__attribute__((unused)) int sig){
141
process *proc = process_list;
142
int status;
143
pid_t pid = wait(&status);
144
while(proc != NULL and proc->pid != pid){
145
proc = proc->next;
146
}
147
if(proc == NULL){
148
/* Process not found in process list */
149
return;
150
}
151
proc->status = status;
152
proc->completed = true;
153
}
154
155
29
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
157
size_t d_name_len;
158
DIR *dir = NULL;
30
char plugindir[] = "plugins.d";
31
size_t d_name_len, plugindir_len = sizeof(plugindir)-1;
32
DIR *dir;
159
33
struct dirent *dirst;
160
34
struct stat st;
161
fd_set rfds_all;
35
fd_set rfds_orig;
162
36
int ret, maxfd = 0;
163
uid_t uid = 65534;
164
gid_t gid = 65534;
165
bool debug = false;
166
int exitstatus = EXIT_SUCCESS;
167
struct sigaction old_sigchld_action;
168
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
169
.sa_flags = SA_NOCLDSTOP };
170
171
/* Establish a signal handler */
172
sigemptyset(&sigchld_action.sa_mask);
173
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
174
if(ret < 0){
175
perror("sigaddset");
176
exit(EXIT_FAILURE);
177
}
178
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
179
if(ret < 0){
180
perror("sigaction");
181
exit(EXIT_FAILURE);
182
}
183
184
/* The options we understand. */
185
struct argp_option options[] = {
186
{ .name = "global-options", .key = 'g',
187
.arg = "OPTION[,OPTION[,...]]",
188
.doc = "Options passed to all plugins" },
189
{ .name = "options-for", .key = 'o',
190
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
191
.doc = "Options passed only to specified plugin" },
192
{ .name = "disable", .key = 'd',
193
.arg = "PLUGIN",
194
.doc = "Disable a specific plugin", .group = 1 },
195
{ .name = "plugin-dir", .key = 128,
196
.arg = "DIRECTORY",
197
.doc = "Specify a different plugin directory", .group = 2 },
198
{ .name = "userid", .key = 129,
199
.arg = "ID", .flags = 0,
200
.doc = "User ID the plugins will run as", .group = 2 },
201
{ .name = "groupid", .key = 130,
202
.arg = "ID", .flags = 0,
203
.doc = "Group ID the plugins will run as", .group = 2 },
204
{ .name = "debug", .key = 131,
205
.doc = "Debug mode", .group = 3 },
206
{ .name = NULL }
207
};
208
209
error_t parse_opt (int key, char *arg, struct argp_state *state) {
210
/* Get the INPUT argument from `argp_parse', which we know is a
211
pointer to our plugin list pointer. */
212
plugin **plugins = state->input;
213
switch (key) {
214
case 'g':
215
if (arg != NULL){
216
char *p = strtok(arg, ",");
217
do{
218
addargument(getplugin(NULL, plugins), p);
219
p = strtok(NULL, ",");
220
} while (p);
221
}
222
break;
223
case 'o':
224
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);
233
}
234
}
235
break;
236
case 'd':
237
if (arg != NULL){
238
getplugin(arg, plugins)->disabled = true;
239
}
240
break;
241
case 128:
242
plugindir = arg;
243
break;
244
case 129:
245
uid = (uid_t)strtol(arg, NULL, 10);
246
break;
247
case 130:
248
gid = (gid_t)strtol(arg, NULL, 10);
249
break;
250
case 131:
251
debug = true;
252
break;
253
case ARGP_KEY_ARG:
254
argp_usage (state);
255
break;
256
case ARGP_KEY_END:
257
break;
258
default:
259
return ARGP_ERR_UNKNOWN;
260
}
261
return 0;
262
}
263
264
plugin *plugin_list = NULL;
265
266
struct argp argp = { .options = options, .parser = parse_opt,
267
.args_doc = "",
268
.doc = "Mandos plugin runner -- Run plugins" };
269
270
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
271
272
if(debug){
273
for(plugin *p = plugin_list; p != NULL; p=p->next){
274
fprintf(stderr, "Plugin: %s has %d arguments\n",
275
p->name ? p->name : "Global", p->argc - 1);
276
for(char **a = p->argv; *a != NULL; a++){
277
fprintf(stderr, "\tArg: %s\n", *a);
278
}
279
}
280
}
281
282
ret = setuid(uid);
283
if (ret == -1){
284
perror("setuid");
285
}
286
287
setgid(gid);
288
if (ret == -1){
289
perror("setuid");
290
}
37
process *process_list = NULL;
291
38
292
39
dir = opendir(plugindir);
40
293
41
if(dir == NULL){
294
perror("Could not open plugin dir");
295
exitstatus = EXIT_FAILURE;
296
goto end;
297
}
298
299
/* Set the FD_CLOEXEC flag on the directory, if possible */
300
{
301
int dir_fd = dirfd(dir);
302
if(dir_fd >= 0){
303
ret = set_cloexec_flag(dir_fd);
304
if(ret < 0){
305
perror("set_cloexec_flag");
306
exitstatus = EXIT_FAILURE;
307
goto end;
308
}
309
}
310
}
311
312
FD_ZERO(&rfds_all);
42
fprintf(stderr, "Can not open directory\n");
43
return EXIT_FAILURE;
44
}
45
46
FD_ZERO(&rfds_orig);
313
47
314
48
while(true){
315
49
dirst = readdir(dir);
321
55
322
56
d_name_len = strlen(dirst->d_name);
323
57
324
// Ignore dotfiles, backup files and other junk
325
{
326
bool bad_name = false;
327
328
const char const *bad_prefixes[] = { ".", "#", NULL };
329
330
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
331
".dpkg-old",
332
".dpkg-divert", NULL };
333
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
334
size_t pre_len = strlen(*pre);
335
if((d_name_len >= pre_len)
336
and strncmp((dirst->d_name), *pre, pre_len) == 0){
337
if(debug){
338
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
339
" with bad prefix %s\n", dirst->d_name, *pre);
340
}
341
bad_name = true;
342
break;
343
}
344
}
345
346
if(bad_name){
347
continue;
348
}
349
350
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
351
size_t suf_len = strlen(*suf);
352
if((d_name_len >= suf_len)
353
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
354
== 0)){
355
if(debug){
356
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
357
" with bad suffix %s\n", dirst->d_name, *suf);
358
}
359
bad_name = true;
360
break;
361
}
362
}
363
364
if(bad_name){
365
continue;
366
}
367
}
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
58
// Ignore dotfiles and backup files
59
if (dirst->d_name[0] == '.'
60
or dirst->d_name[d_name_len - 1] == '~'){
61
continue;
62
}
63
64
char *filename = malloc(d_name_len + plugindir_len + 2);
65
strcpy(filename, plugindir);
66
strcat(filename, "/");
67
strcat(filename, dirst->d_name);
68
379
69
stat(filename, &st);
380
381
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
382
if(debug){
383
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
384
" with bad type or mode\n", filename);
385
}
386
free(filename);
387
continue;
388
}
389
if(getplugin(dirst->d_name, &plugin_list)->disabled){
390
if(debug){
391
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
392
dirst->d_name);
393
}
394
free(filename);
395
continue;
396
}
397
plugin *p = getplugin(dirst->d_name, &plugin_list);
398
{
399
/* Add global arguments to argument list for this plugin */
400
plugin *g = getplugin(NULL, &plugin_list);
401
for(char **a = g->argv + 1; *a != NULL; a++){
402
addargument(p, *a);
403
}
404
}
405
int pipefd[2];
406
ret = pipe(pipefd);
407
if (ret == -1){
408
perror("pipe");
409
exitstatus = EXIT_FAILURE;
410
goto end;
411
}
412
ret = set_cloexec_flag(pipefd[0]);
413
if(ret < 0){
414
perror("set_cloexec_flag");
415
exitstatus = EXIT_FAILURE;
416
goto end;
417
}
418
ret = set_cloexec_flag(pipefd[1]);
419
if(ret < 0){
420
perror("set_cloexec_flag");
421
exitstatus = EXIT_FAILURE;
422
goto end;
423
}
424
/* Block SIGCHLD until process is safely in process list */
425
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
426
if(ret < 0){
427
perror("sigprocmask");
428
exitstatus = EXIT_FAILURE;
429
goto end;
430
}
431
// Starting a new process to be watched
432
pid_t pid = fork();
433
if(pid == 0){
434
/* this is the child process */
435
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
436
if(ret < 0){
437
perror("sigaction");
438
_exit(EXIT_FAILURE);
439
}
440
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
441
if(ret < 0){
442
perror("sigprocmask");
443
_exit(EXIT_FAILURE);
444
}
445
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
446
447
if(dirfd(dir) < 0){
448
/* If dir has no file descriptor, we could not set FD_CLOEXEC
449
above and must now close it manually here. */
70
71
if (S_ISREG(st.st_mode) and (access(filename, X_OK) == 0)){
72
// Starting a new process to be watched
73
process *new_process = malloc(sizeof(process));
74
int pipefd[2];
75
pipe(pipefd);
76
new_process->pid = fork();
77
if(new_process->pid == 0){
78
/* this is the child process */
450
79
closedir(dir);
451
}
452
if(execv(filename, p->argv) < 0){
453
perror("execv");
454
_exit(EXIT_FAILURE);
455
}
456
/* no return */
457
}
458
/* parent process */
459
free(filename);
460
close(pipefd[1]); /* close unused write end of pipe */
461
process *new_process = malloc(sizeof(process));
462
if (new_process == NULL){
463
perror("malloc");
464
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
465
if(ret < 0){
466
perror("sigprocmask");
467
}
468
exitstatus = EXIT_FAILURE;
469
goto end;
470
}
471
472
*new_process = (struct process){ .pid = pid,
473
.fd = pipefd[0],
474
.next = process_list };
475
// List handling
476
process_list = new_process;
477
/* Unblock SIGCHLD so signal handler can be run if this process
478
has already completed */
479
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
480
if(ret < 0){
481
perror("sigprocmask");
482
exitstatus = EXIT_FAILURE;
483
goto end;
484
}
485
486
FD_SET(new_process->fd, &rfds_all);
487
488
if (maxfd < new_process->fd){
489
maxfd = new_process->fd;
490
}
491
492
}
493
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);
80
close(pipefd[0]); /* close unused read end of pipe */
81
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
82
/* create a new modified argument list */
83
char **new_argv = malloc(sizeof(char *) * (argc + 1));
84
new_argv[0] = filename;
85
for(int i = 1; i < argc; i++){
86
new_argv[i] = argv[i];
87
}
88
new_argv[argc] = NULL;
89
if(execv(filename, new_argv) < 0){
90
perror(argv[0]);
91
close(pipefd[1]);
92
exit(EXIT_FAILURE);
93
}
94
/* no return */
95
}
96
close(pipefd[1]); /* close unused write end of pipe */
97
new_process->fd = pipefd[0];
98
new_process->buffer = malloc(BUFFER_SIZE);
99
if (new_process->buffer == NULL){
100
perror(argv[0]);
101
goto end;
102
}
103
new_process->buffer_size = BUFFER_SIZE;
104
new_process->buffer_length = 0;
105
FD_SET(new_process->fd, &rfds_orig);
106
107
if (maxfd < new_process->fd){
108
maxfd = new_process->fd;
109
}
110
111
//List handling
112
new_process->next = process_list;
113
process_list = new_process;
114
}
499
115
}
500
116
501
117
closedir(dir);
502
dir = NULL;
503
118
504
if (process_list == NULL){
505
fprintf(stderr, "No plugin processes started, exiting\n");
506
exitstatus = EXIT_FAILURE;
507
goto end;
508
}
509
while(process_list){
510
fd_set rfds = rfds_all;
511
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
512
if (select_ret == -1){
513
perror("select");
514
exitstatus = EXIT_FAILURE;
515
goto end;
516
}
517
/* OK, now either a process completed, or something can be read
518
from one of them */
519
for(process *proc = process_list; proc ; proc = proc->next){
520
/* Is this process completely done? */
521
if(proc->eof and proc->completed){
522
/* Only accept the plugin output if it exited cleanly */
523
if(not WIFEXITED(proc->status)
524
or WEXITSTATUS(proc->status) != 0){
525
/* Bad exit by plugin */
526
if(debug){
527
if(WIFEXITED(proc->status)){
528
fprintf(stderr, "Plugin %d exited with status %d\n",
529
proc->pid, WEXITSTATUS(proc->status));
530
} else if(WIFSIGNALED(proc->status)) {
531
fprintf(stderr, "Plugin %d killed by signal %d\n",
532
proc->pid, WTERMSIG(proc->status));
533
} else if(WCOREDUMP(proc->status)){
534
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
119
if (process_list != NULL){
120
while(true){
121
fd_set rfds = rfds_orig;
122
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
123
if (select_ret == -1){
124
perror(argv[0]);
125
goto end;
126
}else{
127
for(process *process_itr = process_list; process_itr != NULL;
128
process_itr = process_itr->next){
129
if(FD_ISSET(process_itr->fd, &rfds)){
130
if(process_itr->buffer_length + BUFFER_SIZE
131
> process_itr->buffer_size){
132
process_itr->buffer = realloc(process_itr->buffer,
133
process_itr->buffer_size
134
+ BUFFER_SIZE);
135
if (process_itr->buffer == NULL){
136
perror(argv[0]);
137
goto end;
138
}
139
process_itr->buffer_size += BUFFER_SIZE;
535
140
}
536
}
537
/* Remove the plugin */
538
FD_CLR(proc->fd, &rfds_all);
539
/* Block signal while modifying process_list */
540
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
541
if(ret < 0){
542
perror("sigprocmask");
543
exitstatus = EXIT_FAILURE;
544
goto end;
545
}
546
/* Delete this process entry from the list */
547
if(process_list == proc){
548
/* First one - simple */
549
process_list = proc->next;
550
} else {
551
/* Second one or later */
552
for(process *p = process_list; p != NULL; p = p->next){
553
if(p->next == proc){
554
p->next = proc->next;
555
break;
141
ret = read(process_itr->fd, process_itr->buffer
142
+ process_itr->buffer_length, BUFFER_SIZE);
143
process_itr->buffer_length+=ret;
144
if(ret == 0){
145
/* got EOF */
146
/* wait for process exit */
147
int status;
148
waitpid(process_itr->pid, &status, 0);
149
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
150
write(STDOUT_FILENO, process_itr->buffer,
151
process_itr->buffer_length);
152
goto end;
153
} else {
154
FD_CLR(process_itr->fd, &rfds_orig);
556
155
}
557
156
}
558
157
}
559
/* We are done modifying process list, so unblock signal */
560
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
561
NULL);
562
if(ret < 0){
563
perror("sigprocmask");
564
}
565
free(proc->buffer);
566
free(proc);
567
/* We deleted this process from the list, so we can't go
568
proc->next. Therefore, start over from the beginning of
569
the process list */
570
break;
571
}
572
/* 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
}
584
}
585
goto end;
586
}
587
/* This process has not completed. Does it have any output? */
588
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
589
/* This process had nothing to say at this time */
590
continue;
591
}
592
/* Before reading, make the process' data buffer large enough */
593
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
594
proc->buffer = realloc(proc->buffer, proc->buffer_size
595
+ (size_t) BUFFER_SIZE);
596
if (proc->buffer == NULL){
597
perror("malloc");
598
exitstatus = EXIT_FAILURE;
599
goto end;
600
}
601
proc->buffer_size += BUFFER_SIZE;
602
}
603
/* Read from the process */
604
ret = read(proc->fd, proc->buffer + proc->buffer_length,
605
BUFFER_SIZE);
606
if(ret < 0){
607
/* Read error from this process; ignore the error */
608
continue;
609
}
610
if(ret == 0){
611
/* got EOF */
612
proc->eof = true;
613
} else {
614
proc->buffer_length += (size_t) ret;
158
}
615
159
}
616
160
}
617
161
}
618
if(process_list == NULL){
619
fprintf(stderr, "All plugin processes failed, exiting\n");
620
exitstatus = EXIT_FAILURE;
621
}
622
162
623
163
end:
624
/* 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
}
633
634
if(dir != NULL){
635
closedir(dir);
636
}
637
638
/* Free the process list and kill the processes */
639
for(process *next; process_list != NULL; process_list = next){
640
next = process_list->next;
641
close(process_list->fd);
642
kill(process_list->pid, SIGTERM);
643
free(process_list->buffer);
644
free(process_list);
645
}
646
647
/* Wait for any remaining child processes to terminate */
648
do{
649
ret = wait(NULL);
650
} while(ret >= 0);
651
if(errno != ECHILD){
652
perror("wait");
653
}
654
655
return exitstatus;
164
for(process *process_itr = process_list; process_itr != NULL;
165
process_itr = process_itr->next){
166
close(process_itr->fd);
167
kill(process_itr->pid, SIGTERM);
168
free(process_itr->buffer);
169
}
170
171
while(true){
172
int status;
173
ret = wait(&status);
174
if (ret == -1){
175
if(errno != ECHILD){
176
perror("wait");
177
}
178
break;
179
}
180
}
181
return EXIT_SUCCESS;
656
182
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0