21
22
* Contact the authors at <mandos@fukt.bsnet.se>.
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
27
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
FD_SET(), FD_ISSET(), FD_CLR */
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
28
43
#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
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
45
readdir(), closedir(), dirfd() */
37
46
#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(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
#include <string.h> /* strsep, strlen(), asprintf() */
48
56
#include <errno.h> /* errno */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
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,
62
#include <signal.h> /* struct sigaction, sigemptyset(),
63
sigaddset(), sigaction(),
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
SIG_UNBLOCK, kill(), sig_atomic_t
67
#include <errno.h> /* errno, EBADF */
68
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
53
70
#define BUFFER_SIZE 256
57
typedef struct process{
72
#define PDIR "/lib/mandos/plugins.d"
73
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
75
const char *argp_program_version = "plugin-runner " VERSION;
76
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
78
typedef struct plugin{
79
char *name; /* can be NULL or any plugin name */
86
/* Variables used for running processes*/
61
90
size_t buffer_size;
62
91
size_t buffer_length;
93
volatile sig_atomic_t completed;
69
typedef struct plugin{
70
char *name; /* can be NULL or any plugin name */
74
95
struct plugin *next;
77
static plugin *getplugin(char *name, plugin **plugin_list){
78
for (plugin *p = *plugin_list; p != NULL; p = p->next){
80
or (p->name and name and (strcmp(p->name, name) == 0))){
98
static plugin *plugin_list = NULL;
100
/* Gets an existing plugin based on name,
101
or if none is found, creates a new one */
102
static plugin *getplugin(char *name){
103
/* Check for exiting plugin with that name */
104
for(plugin *p = plugin_list; p != NULL; p = p->next){
106
or (p->name and name and (strcmp(p->name, name) == 0))){
84
110
/* Create a new plugin */
85
111
plugin *new_plugin = malloc(sizeof(plugin));
86
if (new_plugin == NULL){
90
new_plugin->name = name;
112
if(new_plugin == NULL){
115
char *copy_name = NULL;
117
copy_name = strdup(name);
118
if(copy_name == NULL){
124
*new_plugin = (plugin){ .name = copy_name,
127
.next = plugin_list };
91
129
new_plugin->argv = malloc(sizeof(char *) * 2);
92
if (new_plugin->argv == NULL){
130
if(new_plugin->argv == NULL){
96
new_plugin->argv[0] = name;
135
new_plugin->argv[0] = copy_name;
97
136
new_plugin->argv[1] = NULL;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
138
new_plugin->environ = malloc(sizeof(char *));
139
if(new_plugin->environ == NULL){
141
free(new_plugin->argv);
145
new_plugin->environ[0] = NULL;
101
147
/* Append the new plugin to the list */
102
*plugin_list = new_plugin;
148
plugin_list = new_plugin;
103
149
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;
152
/* Helper function for add_argument and add_environment */
153
static bool add_to_char_array(const char *new, char ***array,
155
/* Resize the pointed-to array to hold one more pointer */
156
*array = realloc(*array, sizeof(char *)
157
* (size_t) ((*len) + 2));
162
/* Make a copy of the new string */
163
char *copy = strdup(new);
167
/* Insert the copy */
168
(*array)[*len] = copy;
170
/* Add a new terminating NULL pointer to the last element */
171
(*array)[*len] = NULL;
175
/* Add to a plugin's argument vector */
176
static bool add_argument(plugin *p, const char *arg){
180
return add_to_char_array(arg, &(p->argv), &(p->argc));
183
/* Add to a plugin's environment */
184
static bool add_environment(plugin *p, const char *def, bool replace){
188
/* namelen = length of name of environment variable */
189
size_t namelen = (size_t)(strchrnul(def, '=') - def);
190
/* Search for this environment variable */
191
for(char **e = p->environ; *e != NULL; e++){
192
if(strncmp(*e, def, namelen + 1) == 0){
193
/* It already exists */
195
char *new = realloc(*e, strlen(def) + 1);
205
return add_to_char_array(def, &(p->environ), &(p->envc));
130
220
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
224
/* Mark processes as completed when they exit, and save their exit
140
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;
226
static void handle_sigchld(__attribute__((unused)) int sig){
227
int old_errno = errno;
229
plugin *proc = plugin_list;
231
pid_t pid = waitpid(-1, &status, WNOHANG);
233
/* Only still running child processes */
238
/* No child processes */
244
/* A child exited, find it in process_list */
245
while(proc != NULL and proc->pid != pid){
249
/* Process not found in process list */
252
proc->status = status;
258
/* Prints out a password to stdout */
259
static bool print_out_password(const char *buffer, size_t length){
261
for(size_t written = 0; written < length; written += (size_t)ret){
262
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
271
/* Removes and free a plugin from the plugin list */
272
static void free_plugin(plugin *plugin_node){
274
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
277
free(plugin_node->argv);
278
for(char **env = plugin_node->environ; *env != NULL; env++){
281
free(plugin_node->environ);
282
free(plugin_node->buffer);
284
/* Removes the plugin from the singly-linked list */
285
if(plugin_node == plugin_list){
286
/* First one - simple */
287
plugin_list = plugin_list->next;
289
/* Second one or later */
290
for(plugin *p = plugin_list; p != NULL; p = p->next){
291
if(p->next == plugin_node){
292
p->next = plugin_node->next;
301
static void free_plugin_list(void){
302
while(plugin_list != NULL){
303
free_plugin(plugin_list);
155
307
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
308
char *plugindir = NULL;
309
char *argfile = NULL;
157
311
size_t d_name_len;
159
313
struct dirent *dirst;
316
int ret, numchars, maxfd = 0;
163
319
uid_t uid = 65534;
164
320
gid_t gid = 65534;
165
321
bool debug = false;
188
346
{ .name = "global-options", .key = 'g',
189
347
.arg = "OPTION[,OPTION[,...]]",
190
348
.doc = "Options passed to all plugins" },
349
{ .name = "global-env", .key = 'G',
351
.doc = "Environment variable passed to all plugins" },
191
352
{ .name = "options-for", .key = 'o',
192
353
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
193
354
.doc = "Options passed only to specified plugin" },
355
{ .name = "env-for", .key = 'E',
356
.arg = "PLUGIN:ENV=value",
357
.doc = "Environment variable passed to specified plugin" },
194
358
{ .name = "disable", .key = 'd',
196
360
.doc = "Disable a specific plugin", .group = 1 },
361
{ .name = "enable", .key = 'e',
363
.doc = "Enable a specific plugin", .group = 1 },
197
364
{ .name = "plugin-dir", .key = 128,
198
365
.arg = "DIRECTORY",
199
366
.doc = "Specify a different plugin directory", .group = 2 },
200
{ .name = "userid", .key = 129,
201
.arg = "ID", .flags = 0,
202
.doc = "User ID the plugins will run as", .group = 2 },
203
{ .name = "groupid", .key = 130,
204
.arg = "ID", .flags = 0,
205
.doc = "Group ID the plugins will run as", .group = 2 },
206
{ .name = "debug", .key = 131,
207
.doc = "Debug mode", .group = 3 },
367
{ .name = "config-file", .key = 129,
369
.doc = "Specify a different configuration file", .group = 2 },
370
{ .name = "userid", .key = 130,
371
.arg = "ID", .flags = 0,
372
.doc = "User ID the plugins will run as", .group = 3 },
373
{ .name = "groupid", .key = 131,
374
.arg = "ID", .flags = 0,
375
.doc = "Group ID the plugins will run as", .group = 3 },
376
{ .name = "debug", .key = 132,
377
.doc = "Debug mode", .group = 4 },
211
error_t parse_opt (int key, char *arg, struct argp_state *state) {
212
/* Get the INPUT argument from `argp_parse', which we know is a
213
pointer to our plugin list pointer. */
214
plugin **plugins = state->input;
218
char *p = strtok(arg, ",");
220
addargument(getplugin(NULL, plugins), p);
221
p = strtok(NULL, ",");
227
char *name = strtok(arg, ":");
228
char *p = strtok(NULL, ":");
232
addargument(getplugin(name, plugins), p);
233
p = strtok(NULL, ",");
240
getplugin(arg, plugins)->disabled = true;
247
uid = (uid_t)strtol(arg, NULL, 10);
250
gid = (gid_t)strtol(arg, NULL, 10);
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
384
case 'g': /* --global-options */
387
while((plugin_option = strsep(&arg, ",")) != NULL){
388
if(plugin_option[0] == '\0'){
391
if(not add_argument(getplugin(NULL), plugin_option)){
392
perror("add_argument");
393
return ARGP_ERR_UNKNOWN;
398
case 'G': /* --global-env */
402
if(not add_environment(getplugin(NULL), arg, true)){
403
perror("add_environment");
406
case 'o': /* --options-for */
408
char *plugin_name = strsep(&arg, ":");
409
if(plugin_name[0] == '\0'){
413
while((plugin_option = strsep(&arg, ",")) != NULL){
414
if(not add_argument(getplugin(plugin_name), plugin_option)){
415
perror("add_argument");
416
return ARGP_ERR_UNKNOWN;
421
case 'E': /* --env-for */
426
char *envdef = strchr(arg, ':');
431
if(not add_environment(getplugin(arg), envdef+1, true)){
432
perror("add_environment");
436
case 'd': /* --disable */
438
plugin *p = getplugin(arg);
440
return ARGP_ERR_UNKNOWN;
445
case 'e': /* --enable */
447
plugin *p = getplugin(arg);
449
return ARGP_ERR_UNKNOWN;
454
case 128: /* --plugin-dir */
456
plugindir = strdup(arg);
457
if(plugindir == NULL){
461
case 129: /* --config-file */
462
/* This is already done by parse_opt_config_file() */
464
case 130: /* --userid */
465
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
466
if(ret < 1 or tmpmax != (uid_t)tmpmax
467
or arg[numchars] != '\0'){
468
fprintf(stderr, "Bad user ID number: \"%s\", using %"
469
PRIdMAX "\n", arg, (intmax_t)uid);
474
case 131: /* --groupid */
475
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
476
if(ret < 1 or tmpmax != (gid_t)tmpmax
477
or arg[numchars] != '\0'){
478
fprintf(stderr, "Bad group ID number: \"%s\", using %"
479
PRIdMAX "\n", arg, (intmax_t)gid);
484
case 132: /* --debug */
256
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
264
return ARGP_ERR_UNKNOWN;
269
plugin *plugin_list = NULL;
271
struct argp argp = { .options = options, .parser = parse_opt,
272
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
488
* When adding more options before this line, remember to also add a
489
* "case" to the "parse_opt_config_file" function below.
492
/* Cryptsetup always passes an argument, which is an empty
493
string if "none" was specified in /etc/crypttab. So if
494
argument was empty, we ignore it silently. */
496
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
502
return ARGP_ERR_UNKNOWN;
507
/* This option parser is the same as parse_opt() above, except it
508
ignores everything but the --config-file option. */
509
error_t parse_opt_config_file(int key, char *arg,
510
__attribute__((unused))
511
struct argp_state *state){
513
case 'g': /* --global-options */
514
case 'G': /* --global-env */
515
case 'o': /* --options-for */
516
case 'E': /* --env-for */
517
case 'd': /* --disable */
518
case 'e': /* --enable */
519
case 128: /* --plugin-dir */
521
case 129: /* --config-file */
523
argfile = strdup(arg);
528
case 130: /* --userid */
529
case 131: /* --groupid */
530
case 132: /* --debug */
535
return ARGP_ERR_UNKNOWN;
540
struct argp argp = { .options = options,
541
.parser = parse_opt_config_file,
273
543
.doc = "Mandos plugin runner -- Run plugins" };
275
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
278
/* This is a mangled argument in the form of
279
"+--option+--other-option=parameter+--yet-another-option", etc */
280
/* Make new argc and argv vars, and call argp_parse() again. */
281
plus_options++; /* skip the first '+' character */
282
const char delims[] = "+";
285
plus_argv = malloc(sizeof(char*) * 2);
286
if(plus_argv == NULL){
545
/* Parse using parse_opt_config_file() in order to get the custom
546
config file location, if any. */
547
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
548
if(ret == ARGP_ERR_UNKNOWN){
549
fprintf(stderr, "Unknown error while parsing arguments\n");
550
exitstatus = EXIT_FAILURE;
554
/* Reset to the normal argument parser */
555
argp.parser = parse_opt;
557
/* Open the configfile if available */
559
conffp = fopen(AFILE, "r");
561
conffp = fopen(argfile, "r");
564
char *org_line = NULL;
565
char *p, *arg, *new_arg, *line;
567
const char whitespace_delims[] = " \r\t\f\v\n";
568
const char comment_delim[] = "#";
571
custom_argv = malloc(sizeof(char*) * 2);
572
if(custom_argv == NULL){
287
573
perror("malloc");
288
574
exitstatus = EXIT_FAILURE;
291
plus_argv[0] = argv[0];
293
arg = strtok(plus_options, delims); /* Get first argument */
296
plus_argv = realloc(plus_argv, sizeof(char *)
297
* ((unsigned int) new_argc + 1));
298
if(plus_argv == NULL){
300
exitstatus = EXIT_FAILURE;
303
plus_argv[new_argc-1] = arg;
304
plus_argv[new_argc] = NULL;
305
arg = strtok(NULL, delims); /* Get next argument */
307
argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
577
custom_argv[0] = argv[0];
578
custom_argv[1] = NULL;
580
/* for each line in the config file, strip whitespace and ignore
583
sret = getline(&org_line, &size, conffp);
589
arg = strsep(&line, comment_delim);
590
while((p = strsep(&arg, whitespace_delims)) != NULL){
597
exitstatus = EXIT_FAILURE;
603
custom_argv = realloc(custom_argv, sizeof(char *)
604
* ((unsigned int) custom_argc + 1));
605
if(custom_argv == NULL){
607
exitstatus = EXIT_FAILURE;
611
custom_argv[custom_argc-1] = new_arg;
612
custom_argv[custom_argc] = NULL;
617
/* Check for harmful errors and go to fallback. Other errors might
618
not affect opening plugins */
619
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
621
exitstatus = EXIT_FAILURE;
625
/* If there was any arguments from configuration file,
626
pass them to parser as command arguments */
627
if(custom_argv != NULL){
628
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
630
if(ret == ARGP_ERR_UNKNOWN){
631
fprintf(stderr, "Unknown error while parsing arguments\n");
632
exitstatus = EXIT_FAILURE;
637
/* Parse actual command line arguments, to let them override the
639
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
640
if(ret == ARGP_ERR_UNKNOWN){
641
fprintf(stderr, "Unknown error while parsing arguments\n");
642
exitstatus = EXIT_FAILURE;
475
865
perror("sigaction");
476
866
_exit(EXIT_FAILURE);
478
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
868
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
480
870
perror("sigprocmask");
481
871
_exit(EXIT_FAILURE);
483
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
874
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
485
880
if(dirfd(dir) < 0){
486
881
/* If dir has no file descriptor, we could not set FD_CLOEXEC
487
882
above and must now close it manually here. */
490
if(execv(filename, p->argv) < 0){
885
if(p->environ[0] == NULL){
886
if(execv(filename, p->argv) < 0){
891
if(execve(filename, p->argv, p->environ) < 0){
899
close(pipefd[1]); /* Close unused write end of pipe */
498
close(pipefd[1]); /* close unused write end of pipe */
499
process *new_process = malloc(sizeof(process));
500
if (new_process == NULL){
502
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
901
plugin *new_plugin = getplugin(dirst->d_name);
902
if(new_plugin == NULL){
904
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
504
perror("sigprocmask");
906
perror("sigprocmask");
506
908
exitstatus = EXIT_FAILURE;
510
*new_process = (struct process){ .pid = pid,
512
.next = process_list };
514
process_list = new_process;
912
new_plugin->pid = pid;
913
new_plugin->fd = pipefd[0];
515
915
/* Unblock SIGCHLD so signal handler can be run if this process
516
916
has already completed */
517
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
917
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
519
919
perror("sigprocmask");
520
920
exitstatus = EXIT_FAILURE;
524
FD_SET(new_process->fd, &rfds_all);
526
if (maxfd < new_process->fd){
527
maxfd = new_process->fd;
532
/* Free the plugin list */
533
for(plugin *next; plugin_list != NULL; plugin_list = next){
534
next = plugin_list->next;
535
free(plugin_list->argv);
924
FD_SET(new_plugin->fd, &rfds_all);
926
if(maxfd < new_plugin->fd){
927
maxfd = new_plugin->fd;
933
free_plugin(getplugin(NULL));
542
if (process_list == NULL){
543
fprintf(stderr, "No plugin processes started, exiting\n");
544
exitstatus = EXIT_FAILURE;
935
for(plugin *p = plugin_list; p != NULL; p = p->next){
940
fprintf(stderr, "No plugin processes started. Incorrect plugin"
946
/* Main loop while running plugins exist */
548
948
fd_set rfds = rfds_all;
549
949
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
550
if (select_ret == -1){
950
if(select_ret == -1){
551
951
perror("select");
552
952
exitstatus = EXIT_FAILURE;
555
955
/* OK, now either a process completed, or something can be read
556
956
from one of them */
557
for(process *proc = process_list; proc ; proc = proc->next){
957
for(plugin *proc = plugin_list; proc != NULL;){
558
958
/* Is this process completely done? */
559
if(proc->eof and proc->completed){
959
if(proc->completed and proc->eof){
560
960
/* Only accept the plugin output if it exited cleanly */
561
961
if(not WIFEXITED(proc->status)
562
962
or WEXITSTATUS(proc->status) != 0){
563
963
/* Bad exit by plugin */
565
966
if(WIFEXITED(proc->status)){
566
fprintf(stderr, "Plugin %d exited with status %d\n",
567
proc->pid, WEXITSTATUS(proc->status));
568
} else if(WIFSIGNALED(proc->status)) {
569
fprintf(stderr, "Plugin %d killed by signal %d\n",
570
proc->pid, WTERMSIG(proc->status));
967
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
968
" status %d\n", proc->name,
969
(intmax_t) (proc->pid),
970
WEXITSTATUS(proc->status));
971
} else if(WIFSIGNALED(proc->status)){
972
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
973
" signal %d\n", proc->name,
974
(intmax_t) (proc->pid),
975
WTERMSIG(proc->status));
571
976
} else if(WCOREDUMP(proc->status)){
572
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
977
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
978
" core\n", proc->name, (intmax_t) (proc->pid));
575
982
/* Remove the plugin */
576
983
FD_CLR(proc->fd, &rfds_all);
577
985
/* Block signal while modifying process_list */
578
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
986
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
580
988
perror("sigprocmask");
581
989
exitstatus = EXIT_FAILURE;
584
/* Delete this process entry from the list */
585
if(process_list == proc){
586
/* First one - simple */
587
process_list = proc->next;
589
/* Second one or later */
590
for(process *p = process_list; p != NULL; p = p->next){
592
p->next = proc->next;
993
plugin *next_plugin = proc->next;
597
997
/* We are done modifying process list, so unblock signal */
598
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
998
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
601
1001
perror("sigprocmask");
605
/* We deleted this process from the list, so we can't go
606
proc->next. Therefore, start over from the beginning of
1002
exitstatus = EXIT_FAILURE;
1006
if(plugin_list == NULL){
610
1013
/* This process exited nicely, so print its buffer */
611
for(size_t written = 0; written < proc->buffer_length;
612
written += (size_t)ret){
613
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
614
proc->buffer + written,
619
exitstatus = EXIT_FAILURE;
1015
bool bret = print_out_password(proc->buffer,
1016
proc->buffer_length);
1018
perror("print_out_password");
1019
exitstatus = EXIT_FAILURE;
625
1024
/* This process has not completed. Does it have any output? */
626
1025
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
627
1026
/* This process had nothing to say at this time */
630
1030
/* Before reading, make the process' data buffer large enough */
631
1031
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
632
1032
proc->buffer = realloc(proc->buffer, proc->buffer_size
633
1033
+ (size_t) BUFFER_SIZE);
634
if (proc->buffer == NULL){
1034
if(proc->buffer == NULL){
635
1035
perror("malloc");
636
1036
exitstatus = EXIT_FAILURE;
639
1039
proc->buffer_size += BUFFER_SIZE;
641
1041
/* Read from the process */
642
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1042
sret = read(proc->fd, proc->buffer + proc->buffer_length,
645
1045
/* Read error from this process; ignore the error */
650
1051
proc->eof = true;
652
proc->buffer_length += (size_t) ret;
1053
proc->buffer_length += (size_t) sret;
656
if(process_list == NULL){
657
fprintf(stderr, "All plugin processes failed, exiting\n");
658
exitstatus = EXIT_FAILURE;
1061
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1062
/* Fallback if all plugins failed, none are found or an error
1065
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1066
char *passwordbuffer = getpass("Password: ");
1067
size_t len = strlen(passwordbuffer);
1068
/* Strip trailing newline */
1069
if(len > 0 and passwordbuffer[len-1] == '\n'){
1070
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1073
bret = print_out_password(passwordbuffer, len);
1075
perror("print_out_password");
1076
exitstatus = EXIT_FAILURE;
662
1080
/* Restore old signal handler */
663
sigaction(SIGCHLD, &old_sigchld_action, NULL);
667
/* Free the plugin list */
668
for(plugin *next; plugin_list != NULL; plugin_list = next){
669
next = plugin_list->next;
670
free(plugin_list->argv);
1081
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1083
perror("sigaction");
1084
exitstatus = EXIT_FAILURE;
1087
if(custom_argv != NULL){
1088
for(char **arg = custom_argv+1; *arg != NULL; arg++){
674
1094
if(dir != NULL){
678
/* Free the process list and kill the processes */
679
for(process *next; process_list != NULL; process_list = next){
680
next = process_list->next;
681
close(process_list->fd);
682
kill(process_list->pid, SIGTERM);
683
free(process_list->buffer);
1098
/* Kill the processes */
1099
for(plugin *p = plugin_list; p != NULL; p = p->next){
1102
ret = kill(p->pid, SIGTERM);
1103
if(ret == -1 and errno != ESRCH){
1104
/* Set-uid proccesses might not get closed */
687
1110
/* Wait for any remaining child processes to terminate */