21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
27
stderr, STDOUT_FILENO */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
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(),
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(),
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(),
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(),
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(),
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(),
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
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,
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,
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 */
53
67
#define BUFFER_SIZE 256
57
typedef struct process{
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
77
typedef struct plugin{
78
char *name; /* can be NULL or any plugin name */
85
/* Variables used for running processes*/
61
89
size_t buffer_size;
62
90
size_t buffer_length;
69
typedef struct plugin{
70
char *name; /* can be NULL or any plugin name */
92
volatile bool completed;
74
94
struct plugin *next;
77
static plugin *getplugin(char *name, plugin **plugin_list){
78
for (plugin *p = *plugin_list; p != NULL; p = p->next){
97
static plugin *plugin_list = NULL;
99
/* Gets an existing plugin based on name,
100
or if none is found, creates a new one */
101
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
79
104
if ((p->name == name)
80
105
or (p->name and name and (strcmp(p->name, name) == 0))){
84
109
/* Create a new plugin */
85
110
plugin *new_plugin = malloc(sizeof(plugin));
86
111
if (new_plugin == NULL){
90
new_plugin->name = name;
114
char *copy_name = NULL;
116
copy_name = strdup(name);
117
if(copy_name == NULL){
122
*new_plugin = (plugin) { .name = copy_name,
125
.next = plugin_list };
91
127
new_plugin->argv = malloc(sizeof(char *) * 2);
92
128
if (new_plugin->argv == NULL){
96
new_plugin->argv[0] = name;
133
new_plugin->argv[0] = copy_name;
97
134
new_plugin->argv[1] = NULL;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
136
new_plugin->environ = malloc(sizeof(char *));
137
if(new_plugin->environ == NULL){
139
free(new_plugin->argv);
143
new_plugin->environ[0] = NULL;
101
145
/* Append the new plugin to the list */
102
*plugin_list = new_plugin;
146
plugin_list = new_plugin;
103
147
return new_plugin;
106
static void addargument(plugin *p, char *arg){
107
p->argv[p->argc] = arg;
108
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
109
if (p->argv == NULL){
114
p->argv[p->argc] = NULL;
150
/* Helper function for add_argument and add_environment */
151
static bool add_to_char_array(const char *new, char ***array,
153
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
160
/* Make a copy of the new string */
161
char *copy = strdup(new);
165
/* Insert the copy */
166
(*array)[*len] = copy;
168
/* Add a new terminating NULL pointer to the last element */
169
(*array)[*len] = NULL;
173
/* Add to a plugin's argument vector */
174
static bool add_argument(plugin *p, const char *arg){
178
return add_to_char_array(arg, &(p->argv), &(p->argc));
181
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def, bool replace){
186
/* namelen = length of name of environment variable */
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
/* Search for this environment variable */
189
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen + 1) == 0){
191
/* It already exists */
193
char *new = realloc(*e, strlen(def) + 1);
203
return add_to_char_array(def, &(p->environ), &(p->envc));
130
219
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
136
process *process_list = NULL;
138
/* Mark a process as completed when it exits, and save its exit
223
/* Mark processes as completed when they exit, and save their exit
140
225
void handle_sigchld(__attribute__((unused)) int sig){
141
process *proc = process_list;
143
pid_t pid = wait(&status);
144
while(proc != NULL and proc->pid != pid){
148
/* Process not found in process list */
151
proc->status = status;
152
proc->completed = true;
227
plugin *proc = plugin_list;
229
pid_t pid = waitpid(-1, &status, WNOHANG);
231
/* Only still running child processes */
235
if (errno != ECHILD){
238
/* No child processes */
242
/* A child exited, find it in process_list */
243
while(proc != NULL and proc->pid != pid){
247
/* Process not found in process list */
250
proc->status = status;
251
proc->completed = true;
255
/* Prints out a password to stdout */
256
bool print_out_password(const char *buffer, size_t length){
258
for(size_t written = 0; written < length; written += (size_t)ret){
259
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
268
/* Removes and free a plugin from the plugin list */
269
static void free_plugin(plugin *plugin_node){
271
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
274
free(plugin_node->argv);
275
for(char **env = plugin_node->environ; *env != NULL; env++){
278
free(plugin_node->environ);
279
free(plugin_node->buffer);
281
/* Removes the plugin from the singly-linked list */
282
if(plugin_node == plugin_list){
283
/* First one - simple */
284
plugin_list = plugin_list->next;
286
/* Second one or later */
287
for(plugin *p = plugin_list; p != NULL; p = p->next){
288
if(p->next == plugin_node){
289
p->next = plugin_node->next;
298
static void free_plugin_list(void){
299
while(plugin_list != NULL){
300
free_plugin(plugin_list);
155
304
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
305
char *plugindir = NULL;
306
char *argfile = NULL;
157
308
size_t d_name_len;
159
310
struct dirent *dirst;
162
313
int ret, maxfd = 0;
163
316
bool debug = false;
164
317
int exitstatus = EXIT_SUCCESS;
318
struct sigaction old_sigchld_action;
319
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
320
.sa_flags = SA_NOCLDSTOP };
321
char **custom_argv = NULL;
166
324
/* Establish a signal handler */
167
struct sigaction old_sigchld_action,
168
sigchld_action = { .sa_handler = handle_sigchld,
169
.sa_flags = SA_NOCLDSTOP };
170
325
sigemptyset(&sigchld_action.sa_mask);
171
326
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
173
328
perror("sigaddset");
329
exitstatus = EXIT_FAILURE;
176
332
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
178
334
perror("sigaction");
335
exitstatus = EXIT_FAILURE;
182
339
/* The options we understand. */
184
341
{ .name = "global-options", .key = 'g',
185
342
.arg = "OPTION[,OPTION[,...]]",
186
343
.doc = "Options passed to all plugins" },
344
{ .name = "global-env", .key = 'G',
346
.doc = "Environment variable passed to all plugins" },
187
347
{ .name = "options-for", .key = 'o',
188
348
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
189
349
.doc = "Options passed only to specified plugin" },
350
{ .name = "env-for", .key = 'E',
351
.arg = "PLUGIN:ENV=value",
352
.doc = "Environment variable passed to specified plugin" },
190
353
{ .name = "disable", .key = 'd',
192
355
.doc = "Disable a specific plugin", .group = 1 },
356
{ .name = "enable", .key = 'e',
358
.doc = "Enable a specific plugin", .group = 1 },
193
359
{ .name = "plugin-dir", .key = 128,
194
360
.arg = "DIRECTORY",
195
361
.doc = "Specify a different plugin directory", .group = 2 },
196
{ .name = "debug", .key = 129,
197
.doc = "Debug mode", .group = 3 },
362
{ .name = "config-file", .key = 129,
364
.doc = "Specify a different configuration file", .group = 2 },
365
{ .name = "userid", .key = 130,
366
.arg = "ID", .flags = 0,
367
.doc = "User ID the plugins will run as", .group = 3 },
368
{ .name = "groupid", .key = 131,
369
.arg = "ID", .flags = 0,
370
.doc = "Group ID the plugins will run as", .group = 3 },
371
{ .name = "debug", .key = 132,
372
.doc = "Debug mode", .group = 4 },
201
error_t parse_opt (int key, char *arg, struct argp_state *state) {
202
/* Get the INPUT argument from `argp_parse', which we know is a
203
pointer to our plugin list pointer. */
204
plugin **plugins = state->input;
376
error_t parse_opt (int key, char *arg, __attribute__((unused))
377
struct argp_state *state) {
208
char *p = strtok(arg, ",");
210
addargument(getplugin(NULL, plugins), p);
211
p = strtok(NULL, ",");
217
char *name = strtok(arg, ":");
218
char *p = strtok(NULL, ":");
222
addargument(getplugin(name, plugins), p);
223
p = strtok(NULL, ",");
230
getplugin(arg, plugins)->disabled = true;
379
case 'g': /* --global-options */
382
while((p = strsep(&arg, ",")) != NULL){
386
if(not add_argument(getplugin(NULL), p)){
387
perror("add_argument");
388
return ARGP_ERR_UNKNOWN;
393
case 'G': /* --global-env */
397
if(not add_environment(getplugin(NULL), arg, true)){
398
perror("add_environment");
401
case 'o': /* --options-for */
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0' or arg == NULL){
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0' or opt == NULL){
412
while((p = strsep(&opt, ",")) != NULL){
416
if(not add_argument(getplugin(p_name), p)){
417
perror("add_argument");
418
return ARGP_ERR_UNKNOWN;
423
case 'E': /* --env-for */
428
char *envdef = strchr(arg, ':');
433
if(not add_environment(getplugin(arg), envdef+1, true)){
434
perror("add_environment");
438
case 'd': /* --disable */
440
plugin *p = getplugin(arg);
442
return ARGP_ERR_UNKNOWN;
447
case 'e': /* --enable */
449
plugin *p = getplugin(arg);
451
return ARGP_ERR_UNKNOWN;
456
case 128: /* --plugin-dir */
458
plugindir = strdup(arg);
459
if(plugindir == NULL){
463
case 129: /* --config-file */
464
/* This is already done by parse_opt_config_file() */
466
case 130: /* --userid */
467
uid = (uid_t)strtol(arg, NULL, 10);
469
case 131: /* --groupid */
470
gid = (gid_t)strtol(arg, NULL, 10);
472
case 132: /* --debug */
239
475
case ARGP_KEY_ARG:
245
return ARGP_ERR_UNKNOWN;
250
plugin *plugin_list = NULL;
252
struct argp argp = { .options = options, .parser = parse_opt,
476
/* Cryptsetup always passes an argument, which is an empty
477
string if "none" was specified in /etc/crypttab. So if
478
argument was empty, we ignore it silently. */
480
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
486
return ARGP_ERR_UNKNOWN;
491
/* This option parser is the same as parse_opt() above, except it
492
ignores everything but the --config-file option. */
493
error_t parse_opt_config_file (int key, char *arg,
494
__attribute__((unused))
495
struct argp_state *state) {
497
case 'g': /* --global-options */
498
case 'G': /* --global-env */
499
case 'o': /* --options-for */
500
case 'E': /* --env-for */
501
case 'd': /* --disable */
502
case 'e': /* --enable */
503
case 128: /* --plugin-dir */
505
case 129: /* --config-file */
507
argfile = strdup(arg);
512
case 130: /* --userid */
513
case 131: /* --groupid */
514
case 132: /* --debug */
519
return ARGP_ERR_UNKNOWN;
524
struct argp argp = { .options = options,
525
.parser = parse_opt_config_file,
254
527
.doc = "Mandos plugin runner -- Run plugins" };
256
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
529
/* Parse using the parse_opt_config_file in order to get the custom
530
config file location, if any. */
531
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
532
if (ret == ARGP_ERR_UNKNOWN){
533
fprintf(stderr, "Unknown error while parsing arguments\n");
534
exitstatus = EXIT_FAILURE;
538
/* Reset to the normal argument parser */
539
argp.parser = parse_opt;
541
/* Open the configfile if available */
542
if (argfile == NULL){
543
conffp = fopen(AFILE, "r");
545
conffp = fopen(argfile, "r");
548
char *org_line = NULL;
549
char *p, *arg, *new_arg, *line;
552
const char whitespace_delims[] = " \r\t\f\v\n";
553
const char comment_delim[] = "#";
556
custom_argv = malloc(sizeof(char*) * 2);
557
if(custom_argv == NULL){
559
exitstatus = EXIT_FAILURE;
562
custom_argv[0] = argv[0];
563
custom_argv[1] = NULL;
565
/* for each line in the config file, strip whitespace and ignore
568
sret = getline(&org_line, &size, conffp);
574
arg = strsep(&line, comment_delim);
575
while((p = strsep(&arg, whitespace_delims)) != NULL){
582
exitstatus = EXIT_FAILURE;
588
custom_argv = realloc(custom_argv, sizeof(char *)
589
* ((unsigned int) custom_argc + 1));
590
if(custom_argv == NULL){
592
exitstatus = EXIT_FAILURE;
596
custom_argv[custom_argc-1] = new_arg;
597
custom_argv[custom_argc] = NULL;
602
/* Check for harmful errors and go to fallback. Other errors might
603
not affect opening plugins */
604
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
606
exitstatus = EXIT_FAILURE;
610
/* If there was any arguments from configuration file,
611
pass them to parser as command arguments */
612
if(custom_argv != NULL){
613
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
615
if (ret == ARGP_ERR_UNKNOWN){
616
fprintf(stderr, "Unknown error while parsing arguments\n");
617
exitstatus = EXIT_FAILURE;
622
/* Parse actual command line arguments, to let them override the
624
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
625
if (ret == ARGP_ERR_UNKNOWN){
626
fprintf(stderr, "Unknown error while parsing arguments\n");
627
exitstatus = EXIT_FAILURE;
259
632
for(plugin *p = plugin_list; p != NULL; p=p->next){
373
plugin *p = getplugin(dirst->d_name, &plugin_list);
375
784
/* 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++){
785
plugin *g = getplugin(NULL);
787
for(char **a = g->argv + 1; *a != NULL; a++){
788
if(not add_argument(p, *a)){
789
perror("add_argument");
792
/* Add global environment variables */
793
for(char **e = g->environ; *e != NULL; e++){
794
if(not add_environment(p, *e, false)){
795
perror("add_environment");
800
/* If this plugin has any environment variables, we will call
801
using execve and need to duplicate the environment from this
803
if(p->environ[0] != NULL){
804
for(char **e = environ; *e != NULL; e++){
805
if(not add_environment(p, *e, false)){
806
perror("add_environment");
382
812
ret = pipe(pipefd);
385
815
exitstatus = EXIT_FAILURE;
818
/* Ask OS to automatic close the pipe on exec */
388
819
ret = set_cloexec_flag(pipefd[0]);
390
821
perror("set_cloexec_flag");
391
822
exitstatus = EXIT_FAILURE;
394
825
ret = set_cloexec_flag(pipefd[1]);
396
827
perror("set_cloexec_flag");
397
828
exitstatus = EXIT_FAILURE;
400
831
/* Block SIGCHLD until process is safely in process list */
401
832
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
403
834
perror("sigprocmask");
404
835
exitstatus = EXIT_FAILURE;
407
// Starting a new process to be watched
838
/* Starting a new process to be watched */
408
839
pid_t pid = fork();
842
exitstatus = EXIT_FAILURE;
410
846
/* this is the child process */
411
847
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
418
854
perror("sigprocmask");
419
855
_exit(EXIT_FAILURE);
421
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
858
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
423
864
if(dirfd(dir) < 0){
424
865
/* If dir has no file descriptor, we could not set FD_CLOEXEC
425
866
above and must now close it manually here. */
428
if(execv(filename, p->argv) < 0){
869
if(p->environ[0] == NULL){
870
if(execv(filename, p->argv) < 0){
875
if(execve(filename, p->argv, p->environ) < 0){
883
close(pipefd[1]); /* Close unused write end of pipe */
436
close(pipefd[1]); /* close unused write end of pipe */
437
process *new_process = malloc(sizeof(process));
438
if (new_process == NULL){
885
plugin *new_plugin = getplugin(dirst->d_name);
886
if (new_plugin == NULL){
440
888
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
442
perror("sigprocmask");
890
perror("sigprocmask");
444
892
exitstatus = EXIT_FAILURE;
448
*new_process = (struct process){ .pid = pid,
450
.next = process_list };
452
process_list = new_process;
896
new_plugin->pid = pid;
897
new_plugin->fd = pipefd[0];
453
899
/* Unblock SIGCHLD so signal handler can be run if this process
454
900
has already completed */
455
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
457
903
perror("sigprocmask");
458
904
exitstatus = EXIT_FAILURE;
462
FD_SET(new_process->fd, &rfds_all);
464
if (maxfd < new_process->fd){
465
maxfd = new_process->fd;
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);
908
FD_SET(new_plugin->fd, &rfds_all);
910
if (maxfd < new_plugin->fd){
911
maxfd = new_plugin->fd;
480
if (process_list == NULL){
481
fprintf(stderr, "No plugin processes started, exiting\n");
482
exitstatus = EXIT_FAILURE;
919
for(plugin *p = plugin_list; p != NULL; p = p->next){
924
fprintf(stderr, "No plugin processes started. Incorrect plugin"
930
/* Main loop while running plugins exist */
486
932
fd_set rfds = rfds_all;
487
933
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
488
934
if (select_ret == -1){
489
935
perror("select");
490
936
exitstatus = EXIT_FAILURE;
493
939
/* OK, now either a process completed, or something can be read
494
940
from one of them */
495
for(process *proc = process_list; proc ; proc = proc->next){
941
for(plugin *proc = plugin_list; proc != NULL;){
496
942
/* Is this process completely done? */
497
943
if(proc->eof and proc->completed){
498
944
/* Only accept the plugin output if it exited cleanly */
499
945
if(not WIFEXITED(proc->status)
500
946
or WEXITSTATUS(proc->status) != 0){
501
947
/* Bad exit by plugin */
503
950
if(WIFEXITED(proc->status)){
504
fprintf(stderr, "Plugin %d exited with status %d\n",
505
proc->pid, WEXITSTATUS(proc->status));
951
fprintf(stderr, "Plugin %u exited with status %d\n",
952
(unsigned int) (proc->pid),
953
WEXITSTATUS(proc->status));
506
954
} else if(WIFSIGNALED(proc->status)) {
507
fprintf(stderr, "Plugin %d killed by signal %d\n",
508
proc->pid, WTERMSIG(proc->status));
955
fprintf(stderr, "Plugin %u killed by signal %d\n",
956
(unsigned int) (proc->pid),
957
WTERMSIG(proc->status));
509
958
} else if(WCOREDUMP(proc->status)){
510
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
959
fprintf(stderr, "Plugin %d dumped core\n",
960
(unsigned int) (proc->pid));
513
964
/* Remove the plugin */
514
965
FD_CLR(proc->fd, &rfds_all);
515
967
/* Block signal while modifying process_list */
516
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
968
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
518
970
perror("sigprocmask");
519
971
exitstatus = EXIT_FAILURE;
522
/* Delete this process entry from the list */
523
if(process_list == proc){
524
/* First one - simple */
525
process_list = proc->next;
527
/* Second one or later */
528
for(process *p = process_list; p != NULL; p = p->next){
530
p->next = proc->next;
535
975
/* We are done modifying process list, so unblock signal */
536
976
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
539
979
perror("sigprocmask");
543
/* We deleted this process from the list, so we can't go
544
proc->next. Therefore, start over from the beginning of
980
exitstatus = EXIT_FAILURE;
984
if(plugin_list == NULL){
988
plugin *next_plugin = proc->next;
548
994
/* 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,
557
exitstatus = EXIT_FAILURE;
996
bool bret = print_out_password(proc->buffer,
997
proc->buffer_length);
999
perror("print_out_password");
1000
exitstatus = EXIT_FAILURE;
563
1005
/* This process has not completed. Does it have any output? */
564
1006
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
565
1007
/* This process had nothing to say at this time */
568
1011
/* Before reading, make the process' data buffer large enough */