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- Committer: Teddy Hogeborn
- Date: 2008-08-02 14:33:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20080802143347-u1m4zs1q0feu72ei
* TODO: Converted to org-mode style
* plugins.d/mandosclient.c (certdir): Changed to "/conf/conf.d/mandos/".
(certdir, certfile, certkey, pgp_packet_decrypt, debuggnutls,
initgnutls, empty_log, combinepath): Made static.
(combinepath): Rewritten to only get the argument string lengths
once. Do not print error message; leave that to
caller. All callers changed.
* plugins.d/mandosclient.c (certdir): Changed to "/conf/conf.d/mandos/".
(certdir, certfile, certkey, pgp_packet_decrypt, debuggnutls,
initgnutls, empty_log, combinepath): Made static.
(combinepath): Rewritten to only get the argument string lengths
once. Do not print error message; leave that to
caller. All callers changed.
- files modified:
- TODO
added
removed
plugbasedclient.c
21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
22
*/
23
23
24
#include <stdio.h> /* popen, fileno */
25
#include <iso646.h> /* and, or, not */
26
#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
27
WIFEXITED, WEXITSTATUS, wait */
28
#include <sys/wait.h> /* wait */
29
#include <dirent.h> /* DIR, opendir */
30
#include <sys/stat.h> /* stat, struct stat */
31
#include <unistd.h> /* stat, struct stat, chdir */
32
#include <stdlib.h> /* EXIT_FAILURE */
33
#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET,
34
FD_ISSET */
35
#include <string.h> /* strlen, strcpy, strcat */
36
#include <stdbool.h> /* true */
37
#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
38
#include <errno.h> /* errno */
39
#include <argp.h> /* argp */
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() */
40
52
41
53
struct process;
42
54
46
58
char *buffer;
47
59
size_t buffer_size;
48
60
size_t buffer_length;
61
bool eof;
62
bool completed;
63
int status;
49
64
struct process *next;
50
65
} process;
51
66
52
67
typedef struct plugin{
53
char *name; /* can be "global" and any plugin name */
68
char *name; /* can be NULL or any plugin name */
54
69
char **argv;
55
70
int argc;
71
bool disabled;
56
72
struct plugin *next;
57
73
} plugin;
58
74
78
94
new_plugin->argv[0] = name;
79
95
new_plugin->argv[1] = NULL;
80
96
new_plugin->argc = 1;
97
new_plugin->disabled = false;
98
new_plugin->next = *plugin_list;
81
99
/* Append the new plugin to the list */
82
new_plugin->next = *plugin_list;
83
100
*plugin_list = new_plugin;
84
101
return new_plugin;
85
102
}
86
103
87
void addarguments(plugin *p, char *arg){
104
void addargument(plugin *p, char *arg){
88
105
p->argv[p->argc] = arg;
89
106
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
90
107
if (p->argv == NULL){
94
111
p->argc++;
95
112
p->argv[p->argc] = NULL;
96
113
}
97
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
98
131
#define BUFFER_SIZE 256
99
132
100
const char *argp_program_version =
101
"plugbasedclient 0.9";
102
const char *argp_program_bug_address =
103
"<mandos@fukt.bsnet.se>";
104
static char doc[] =
105
"Mandos plugin runner -- Run Mandos plugins";
106
/* A description of the arguments we accept. */
107
static char args_doc[] = "";
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
}
108
154
109
155
int main(int argc, char *argv[]){
110
char plugindir[] = "plugins.d";
111
size_t d_name_len, plugindir_len = sizeof(plugindir)-1;
112
DIR *dir;
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
157
size_t d_name_len;
158
DIR *dir = NULL;
113
159
struct dirent *dirst;
114
160
struct stat st;
115
fd_set rfds_orig;
161
fd_set rfds_all;
116
162
int ret, maxfd = 0;
117
process *process_list = NULL;
163
bool debug = false;
164
int exitstatus = EXIT_SUCCESS;
165
166
/* Establish a signal handler */
167
struct sigaction old_sigchld_action,
168
sigchld_action = { .sa_handler = handle_sigchld,
169
.sa_flags = SA_NOCLDSTOP };
170
sigemptyset(&sigchld_action.sa_mask);
171
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
172
if(ret < 0){
173
perror("sigaddset");
174
exit(EXIT_FAILURE);
175
}
176
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
177
if(ret < 0){
178
perror("sigaction");
179
exit(EXIT_FAILURE);
180
}
118
181
119
182
/* The options we understand. */
120
183
struct argp_option options[] = {
121
184
{ .name = "global-options", .key = 'g',
122
.arg = "option[,option[,...]]", .flags = 0,
123
.doc = "Options effecting all plugins" },
185
.arg = "OPTION[,OPTION[,...]]",
186
.doc = "Options passed to all plugins" },
124
187
{ .name = "options-for", .key = 'o',
125
.arg = "plugin:option[,option[,...]]", .flags = 0,
126
.doc = "Options effecting only specified plugins" },
188
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
189
.doc = "Options passed only to specified plugin" },
190
{ .name = "disable", .key = 'd',
191
.arg = "PLUGIN",
192
.doc = "Disable a specific plugin", .group = 1 },
193
{ .name = "plugin-dir", .key = 128,
194
.arg = "DIRECTORY",
195
.doc = "Specify a different plugin directory", .group = 2 },
196
{ .name = "debug", .key = 129,
197
.doc = "Debug mode", .group = 3 },
127
198
{ .name = NULL }
128
199
};
129
200
130
201
error_t parse_opt (int key, char *arg, struct argp_state *state) {
131
/* Get the INPUT argument from `argp_parse', which we
132
know is a pointer to our arguments structure. */
202
/* Get the INPUT argument from `argp_parse', which we know is a
203
pointer to our plugin list pointer. */
133
204
plugin **plugins = state->input;
134
205
switch (key) {
135
206
case 'g':
136
207
if (arg != NULL){
137
208
char *p = strtok(arg, ",");
138
209
do{
139
addarguments(getplugin(NULL, plugins), p);
210
addargument(getplugin(NULL, plugins), p);
140
211
p = strtok(NULL, ",");
141
212
} while (p);
142
213
}
145
216
if (arg != NULL){
146
217
char *name = strtok(arg, ":");
147
218
char *p = strtok(NULL, ":");
148
p = strtok(p, ",");
149
do{
150
addarguments(getplugin(name, plugins), p);
151
p = strtok(NULL, ",");
152
} while (p);
153
}
219
if(p){
220
p = strtok(p, ",");
221
do{
222
addargument(getplugin(name, plugins), p);
223
p = strtok(NULL, ",");
224
} while (p);
225
}
226
}
227
break;
228
case 'd':
229
if (arg != NULL){
230
getplugin(arg, plugins)->disabled = true;
231
}
232
break;
233
case 128:
234
plugindir = arg;
235
break;
236
case 129:
237
debug = true;
154
238
break;
155
239
case ARGP_KEY_ARG:
156
240
argp_usage (state);
162
246
}
163
247
return 0;
164
248
}
165
249
166
250
plugin *plugin_list = NULL;
167
251
168
252
struct argp argp = { .options = options, .parser = parse_opt,
169
.args_doc = args_doc, .doc = doc };
170
253
.args_doc = "",
254
.doc = "Mandos plugin runner -- Run plugins" };
255
171
256
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
172
173
/* for(plugin *p = plugin_list; p != NULL; p=p->next){ */
174
/* fprintf(stderr, "Plugin: %s has %d arguments\n", p->name ? p->name : "Global", p->argc); */
175
/* for(char **a = p->argv + 1; *a != NULL; a++){ */
176
/* fprintf(stderr, "\tArg: %s\n", *a); */
177
/* } */
178
/* } */
179
257
180
/* return 0; */
258
if(debug){
259
for(plugin *p = plugin_list; p != NULL; p=p->next){
260
fprintf(stderr, "Plugin: %s has %d arguments\n",
261
p->name ? p->name : "Global", p->argc - 1);
262
for(char **a = p->argv; *a != NULL; a++){
263
fprintf(stderr, "\tArg: %s\n", *a);
264
}
265
}
266
}
181
267
182
268
dir = opendir(plugindir);
183
184
269
if(dir == NULL){
185
fprintf(stderr, "Can not open directory\n");
186
return EXIT_FAILURE;
187
}
188
189
FD_ZERO(&rfds_orig);
270
perror("Could not open plugin dir");
271
exitstatus = EXIT_FAILURE;
272
goto end;
273
}
274
275
/* Set the FD_CLOEXEC flag on the directory, if possible */
276
{
277
int dir_fd = dirfd(dir);
278
if(dir_fd >= 0){
279
ret = set_cloexec_flag(dir_fd);
280
if(ret < 0){
281
perror("set_cloexec_flag");
282
exitstatus = EXIT_FAILURE;
283
goto end;
284
}
285
}
286
}
287
288
FD_ZERO(&rfds_all);
190
289
191
290
while(true){
192
291
dirst = readdir(dir);
198
297
199
298
d_name_len = strlen(dirst->d_name);
200
299
201
// Ignore dotfiles and backup files
202
if (dirst->d_name[0] == '.'
203
or dirst->d_name[d_name_len - 1] == '~'){
204
continue;
205
}
206
207
char *filename = malloc(d_name_len + plugindir_len + 2);
208
strcpy(filename, plugindir);
209
strcat(filename, "/");
210
strcat(filename, dirst->d_name);
211
300
// Ignore dotfiles, backup files and other junk
301
{
302
bool bad_name = false;
303
304
const char const *bad_prefixes[] = { ".", "#", NULL };
305
306
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
307
".dpkg-old",
308
".dpkg-divert", NULL };
309
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
310
size_t pre_len = strlen(*pre);
311
if((d_name_len >= pre_len)
312
and strncmp((dirst->d_name), *pre, pre_len) == 0){
313
if(debug){
314
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
315
" with bad prefix %s\n", dirst->d_name, *pre);
316
}
317
bad_name = true;
318
break;
319
}
320
}
321
322
if(bad_name){
323
continue;
324
}
325
326
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
327
size_t suf_len = strlen(*suf);
328
if((d_name_len >= suf_len)
329
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
330
== 0)){
331
if(debug){
332
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
333
" with bad suffix %s\n", dirst->d_name, *suf);
334
}
335
bad_name = true;
336
break;
337
}
338
}
339
340
if(bad_name){
341
continue;
342
}
343
}
344
345
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
346
if (filename == NULL){
347
perror("malloc");
348
exitstatus = EXIT_FAILURE;
349
goto end;
350
}
351
strcpy(filename, plugindir); /* Spurious warning */
352
strcat(filename, "/"); /* Spurious warning */
353
strcat(filename, dirst->d_name); /* Spurious warning */
354
212
355
stat(filename, &st);
213
214
if (S_ISREG(st.st_mode) and (access(filename, X_OK) == 0)){
215
// Starting a new process to be watched
216
process *new_process = malloc(sizeof(process));
217
int pipefd[2];
218
ret = pipe(pipefd);
219
if (ret == -1){
220
perror(argv[0]);
221
goto end;
222
}
223
new_process->pid = fork();
224
if(new_process->pid == 0){
225
/* this is the child process */
356
357
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
358
if(debug){
359
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
360
" with bad type or mode\n", filename);
361
}
362
free(filename);
363
continue;
364
}
365
if(getplugin(dirst->d_name, &plugin_list)->disabled){
366
if(debug){
367
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
368
dirst->d_name);
369
}
370
free(filename);
371
continue;
372
}
373
plugin *p = getplugin(dirst->d_name, &plugin_list);
374
{
375
/* Add global arguments to argument list for this plugin */
376
plugin *g = getplugin(NULL, &plugin_list);
377
for(char **a = g->argv + 1; *a != NULL; a++){
378
addargument(p, *a);
379
}
380
}
381
int pipefd[2];
382
ret = pipe(pipefd);
383
if (ret == -1){
384
perror("pipe");
385
exitstatus = EXIT_FAILURE;
386
goto end;
387
}
388
ret = set_cloexec_flag(pipefd[0]);
389
if(ret < 0){
390
perror("set_cloexec_flag");
391
exitstatus = EXIT_FAILURE;
392
goto end;
393
}
394
ret = set_cloexec_flag(pipefd[1]);
395
if(ret < 0){
396
perror("set_cloexec_flag");
397
exitstatus = EXIT_FAILURE;
398
goto end;
399
}
400
/* Block SIGCHLD until process is safely in process list */
401
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
402
if(ret < 0){
403
perror("sigprocmask");
404
exitstatus = EXIT_FAILURE;
405
goto end;
406
}
407
// Starting a new process to be watched
408
pid_t pid = fork();
409
if(pid == 0){
410
/* this is the child process */
411
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
412
if(ret < 0){
413
perror("sigaction");
414
_exit(EXIT_FAILURE);
415
}
416
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
417
if(ret < 0){
418
perror("sigprocmask");
419
_exit(EXIT_FAILURE);
420
}
421
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
422
423
if(dirfd(dir) < 0){
424
/* If dir has no file descriptor, we could not set FD_CLOEXEC
425
above and must now close it manually here. */
226
426
closedir(dir);
227
close(pipefd[0]); /* close unused read end of pipe */
228
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
229
char *basename;
230
basename = strrchr(filename, '/');
231
if (basename == NULL){
232
basename = filename;
233
} else {
234
basename++;
235
}
236
plugin *p = getplugin(basename, &plugin_list);
237
238
plugin *g = getplugin(NULL, &plugin_list);
239
for(char **a = g->argv + 1; *a != NULL; a++){
240
addarguments(p, *a);
241
}
242
if(execv(filename, p->argv) < 0){
243
perror(argv[0]);
244
close(pipefd[1]);
245
exit(EXIT_FAILURE);
246
}
247
/* no return */
248
}
249
close(pipefd[1]); /* close unused write end of pipe */
250
new_process->fd = pipefd[0];
251
new_process->buffer = malloc(BUFFER_SIZE);
252
if (new_process->buffer == NULL){
253
perror(argv[0]);
254
goto end;
255
}
256
new_process->buffer_size = BUFFER_SIZE;
257
new_process->buffer_length = 0;
258
FD_SET(new_process->fd, &rfds_orig);
259
260
if (maxfd < new_process->fd){
261
maxfd = new_process->fd;
262
}
263
264
//List handling
265
new_process->next = process_list;
266
process_list = new_process;
267
}
427
}
428
if(execv(filename, p->argv) < 0){
429
perror("execv");
430
_exit(EXIT_FAILURE);
431
}
432
/* no return */
433
}
434
/* parent process */
435
free(filename);
436
close(pipefd[1]); /* close unused write end of pipe */
437
process *new_process = malloc(sizeof(process));
438
if (new_process == NULL){
439
perror("malloc");
440
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
441
if(ret < 0){
442
perror("sigprocmask");
443
}
444
exitstatus = EXIT_FAILURE;
445
goto end;
446
}
447
448
*new_process = (struct process){ .pid = pid,
449
.fd = pipefd[0],
450
.next = process_list };
451
// List handling
452
process_list = new_process;
453
/* Unblock SIGCHLD so signal handler can be run if this process
454
has already completed */
455
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
456
if(ret < 0){
457
perror("sigprocmask");
458
exitstatus = EXIT_FAILURE;
459
goto end;
460
}
461
462
FD_SET(new_process->fd, &rfds_all);
463
464
if (maxfd < new_process->fd){
465
maxfd = new_process->fd;
466
}
467
468
}
469
470
/* Free the plugin list */
471
for(plugin *next; plugin_list != NULL; plugin_list = next){
472
next = plugin_list->next;
473
free(plugin_list->argv);
474
free(plugin_list);
268
475
}
269
476
270
477
closedir(dir);
478
dir = NULL;
271
479
272
if (process_list != NULL){
273
while(true){
274
fd_set rfds = rfds_orig;
275
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
276
if (select_ret == -1){
277
perror(argv[0]);
278
goto end;
279
}else{
280
for(process *process_itr = process_list; process_itr != NULL;
281
process_itr = process_itr->next){
282
if(FD_ISSET(process_itr->fd, &rfds)){
283
if(process_itr->buffer_length + BUFFER_SIZE
284
> process_itr->buffer_size){
285
process_itr->buffer = realloc(process_itr->buffer,
286
process_itr->buffer_size
287
+ (size_t) BUFFER_SIZE);
288
if (process_itr->buffer == NULL){
289
perror(argv[0]);
290
goto end;
291
}
292
process_itr->buffer_size += BUFFER_SIZE;
293
}
294
ret = read(process_itr->fd, process_itr->buffer
295
+ process_itr->buffer_length, BUFFER_SIZE);
296
if(ret < 0){
297
/* Read error from this process; ignore it */
298
continue;
299
}
300
process_itr->buffer_length += (size_t) ret;
301
if(ret == 0){
302
/* got EOF */
303
/* wait for process exit */
304
int status;
305
waitpid(process_itr->pid, &status, 0);
306
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
307
for(size_t written = 0;
308
written < process_itr->buffer_length;){
309
ret = write(STDOUT_FILENO,
310
process_itr->buffer + written,
311
process_itr->buffer_length - written);
312
if(ret < 0){
313
perror(argv[0]);
314
goto end;
315
}
316
written += (size_t)ret;
317
}
318
goto end;
319
} else {
320
FD_CLR(process_itr->fd, &rfds_orig);
480
if (process_list == NULL){
481
fprintf(stderr, "No plugin processes started, exiting\n");
482
exitstatus = EXIT_FAILURE;
483
goto end;
484
}
485
while(process_list){
486
fd_set rfds = rfds_all;
487
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
488
if (select_ret == -1){
489
perror("select");
490
exitstatus = EXIT_FAILURE;
491
goto end;
492
}
493
/* OK, now either a process completed, or something can be read
494
from one of them */
495
for(process *proc = process_list; proc ; proc = proc->next){
496
/* Is this process completely done? */
497
if(proc->eof and proc->completed){
498
/* Only accept the plugin output if it exited cleanly */
499
if(not WIFEXITED(proc->status)
500
or WEXITSTATUS(proc->status) != 0){
501
/* Bad exit by plugin */
502
if(debug){
503
if(WIFEXITED(proc->status)){
504
fprintf(stderr, "Plugin %d exited with status %d\n",
505
proc->pid, WEXITSTATUS(proc->status));
506
} else if(WIFSIGNALED(proc->status)) {
507
fprintf(stderr, "Plugin %d killed by signal %d\n",
508
proc->pid, WTERMSIG(proc->status));
509
} else if(WCOREDUMP(proc->status)){
510
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
511
}
512
}
513
/* Remove the plugin */
514
FD_CLR(proc->fd, &rfds_all);
515
/* Block signal while modifying process_list */
516
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
517
if(ret < 0){
518
perror("sigprocmask");
519
exitstatus = EXIT_FAILURE;
520
goto end;
521
}
522
/* Delete this process entry from the list */
523
if(process_list == proc){
524
/* First one - simple */
525
process_list = proc->next;
526
} else {
527
/* Second one or later */
528
for(process *p = process_list; p != NULL; p = p->next){
529
if(p->next == proc){
530
p->next = proc->next;
531
break;
321
532
}
322
533
}
323
534
}
324
}
535
/* We are done modifying process list, so unblock signal */
536
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
537
NULL);
538
if(ret < 0){
539
perror("sigprocmask");
540
}
541
free(proc->buffer);
542
free(proc);
543
/* We deleted this process from the list, so we can't go
544
proc->next. Therefore, start over from the beginning of
545
the process list */
546
break;
547
}
548
/* This process exited nicely, so print its buffer */
549
for(size_t written = 0; written < proc->buffer_length;
550
written += (size_t)ret){
551
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
552
proc->buffer + written,
553
proc->buffer_length
554
- written));
555
if(ret < 0){
556
perror("write");
557
exitstatus = EXIT_FAILURE;
558
goto end;
559
}
560
}
561
goto end;
562
}
563
/* This process has not completed. Does it have any output? */
564
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
565
/* This process had nothing to say at this time */
566
continue;
567
}
568
/* Before reading, make the process' data buffer large enough */
569
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
570
proc->buffer = realloc(proc->buffer, proc->buffer_size
571
+ (size_t) BUFFER_SIZE);
572
if (proc->buffer == NULL){
573
perror("malloc");
574
exitstatus = EXIT_FAILURE;
575
goto end;
576
}
577
proc->buffer_size += BUFFER_SIZE;
578
}
579
/* Read from the process */
580
ret = read(proc->fd, proc->buffer + proc->buffer_length,
581
BUFFER_SIZE);
582
if(ret < 0){
583
/* Read error from this process; ignore the error */
584
continue;
585
}
586
if(ret == 0){
587
/* got EOF */
588
proc->eof = true;
589
} else {
590
proc->buffer_length += (size_t) ret;
325
591
}
326
592
}
327
593
}
594
if(process_list == NULL){
595
fprintf(stderr, "All plugin processes failed, exiting\n");
596
exitstatus = EXIT_FAILURE;
597
}
328
598
329
599
end:
330
for(process *process_itr = process_list; process_itr != NULL;
331
process_itr = process_itr->next){
332
close(process_itr->fd);
333
kill(process_itr->pid, SIGTERM);
334
free(process_itr->buffer);
335
}
336
337
while(true){
338
int status;
339
ret = wait(&status);
340
if (ret == -1){
341
if(errno != ECHILD){
342
perror("wait");
343
}
344
break;
345
}
346
}
347
return EXIT_SUCCESS;
600
/* Restore old signal handler */
601
sigaction(SIGCHLD, &old_sigchld_action, NULL);
602
603
/* Free the plugin list */
604
for(plugin *next; plugin_list != NULL; plugin_list = next){
605
next = plugin_list->next;
606
free(plugin_list->argv);
607
free(plugin_list);
608
}
609
610
if(dir != NULL){
611
closedir(dir);
612
}
613
614
/* Free the process list and kill the processes */
615
for(process *next; process_list != NULL; process_list = next){
616
next = process_list->next;
617
close(process_list->fd);
618
kill(process_list->pid, SIGTERM);
619
free(process_list->buffer);
620
free(process_list);
621
}
622
623
/* Wait for any remaining child processes to terminate */
624
do{
625
ret = wait(NULL);
626
} while(ret >= 0);
627
if(errno != ECHILD){
628
perror("wait");
629
}
630
631
return exitstatus;
348
632
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0