24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
29
EXIT_SUCCESS, realloc() */
29
30
#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
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
67
72
#define BUFFER_SIZE 256
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
70
const char *argp_program_version = "plugin-runner 1.0";
74
#define PDIR "/lib/mandos/plugins.d"
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
77
const char *argp_program_version = "plugin-runner " VERSION;
71
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
75
typedef struct process{
82
volatile bool completed;
87
80
typedef struct plugin{
88
81
char *name; /* can be NULL or any plugin name */
88
/* Variables used for running processes*/
95
volatile sig_atomic_t completed;
94
97
struct plugin *next;
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
100
or (p->name and name and (strcmp(p->name, name) == 0))){
100
static plugin *plugin_list = NULL;
102
/* Gets an existing plugin based on name,
103
or if none is found, creates a new one */
104
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
108
or (p->name and name and (strcmp(p->name, name) == 0))){
104
112
/* Create a new plugin */
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
113
plugin *new_plugin = NULL;
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
109
120
char *copy_name = NULL;
110
121
if(name != NULL){
111
copy_name = strdup(name);
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
112
125
if(copy_name == NULL){
117
*new_plugin = (plugin) { .name = copy_name,
121
.next = *plugin_list };
131
*new_plugin = (plugin){ .name = copy_name,
134
.next = plugin_list };
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
126
141
free(new_plugin);
129
144
new_plugin->argv[0] = copy_name;
130
145
new_plugin->argv[1] = NULL;
132
new_plugin->environ = malloc(sizeof(char *));
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
133
150
if(new_plugin->environ == NULL){
135
152
free(new_plugin->argv);
176
199
/* Add to a plugin's environment */
177
static bool add_environment(plugin *p, const char *def){
200
static bool add_environment(plugin *p, const char *def, bool replace){
204
/* namelen = length of name of environment variable */
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
209
/* It already exists */
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
181
224
return add_to_char_array(def, &(p->environ), &(p->envc));
186
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
187
229
* Descriptor Flags".
188
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
190
static int set_cloexec_flag(int fd)
192
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
193
234
/* If reading the flags failed, return error indication now. */
197
238
/* Store modified flag word in the descriptor. */
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
201
process *process_list = NULL;
203
244
/* Mark processes as completed when they exit, and save their exit
205
void handle_sigchld(__attribute__((unused)) int sig){
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
207
process *proc = process_list;
249
plugin *proc = plugin_list;
209
251
pid_t pid = waitpid(-1, &status, WNOHANG);
250
char **add_to_argv(char **argv, int *argc, char *arg){
253
argv = malloc(sizeof(char*) * 2);
291
/* Removes and free a plugin from the plugin list */
292
static void free_plugin(plugin *plugin_node){
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
297
free(plugin_node->argv);
298
for(char **env = plugin_node->environ; *env != NULL; env++){
301
free(plugin_node->environ);
302
free(plugin_node->buffer);
304
/* Removes the plugin from the singly-linked list */
305
if(plugin_node == plugin_list){
306
/* First one - simple */
307
plugin_list = plugin_list->next;
309
/* Second one or later */
310
for(plugin *p = plugin_list; p != NULL; p = p->next){
311
if(p->next == plugin_node){
312
p->next = plugin_node->next;
257
argv[0] = NULL; /* Will be set to argv[0] in main before
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
282
free(plugin_list->environ);
321
static void free_plugin_list(void){
322
while(plugin_list != NULL){
323
free_plugin(plugin_list);
287
327
int main(int argc, char *argv[]){
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
328
char *plugindir = NULL;
329
char *argfile = NULL;
291
331
size_t d_name_len;
324
365
{ .name = "global-options", .key = 'g',
325
366
.arg = "OPTION[,OPTION[,...]]",
326
367
.doc = "Options passed to all plugins" },
327
{ .name = "global-envs", .key = 'e',
368
{ .name = "global-env", .key = 'G',
328
369
.arg = "VAR=value",
329
370
.doc = "Environment variable passed to all plugins" },
330
371
{ .name = "options-for", .key = 'o',
331
372
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
332
373
.doc = "Options passed only to specified plugin" },
333
{ .name = "envs-for", .key = 'f',
374
{ .name = "env-for", .key = 'E',
334
375
.arg = "PLUGIN:ENV=value",
335
376
.doc = "Environment variable passed to specified plugin" },
336
377
{ .name = "disable", .key = 'd',
338
379
.doc = "Disable a specific plugin", .group = 1 },
380
{ .name = "enable", .key = 'e',
382
.doc = "Enable a specific plugin", .group = 1 },
339
383
{ .name = "plugin-dir", .key = 128,
340
384
.arg = "DIRECTORY",
341
385
.doc = "Specify a different plugin directory", .group = 2 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
386
{ .name = "config-file", .key = 129,
388
.doc = "Specify a different configuration file", .group = 2 },
389
{ .name = "userid", .key = 130,
390
.arg = "ID", .flags = 0,
391
.doc = "User ID the plugins will run as", .group = 3 },
392
{ .name = "groupid", .key = 131,
393
.arg = "ID", .flags = 0,
394
.doc = "Group ID the plugins will run as", .group = 3 },
395
{ .name = "debug", .key = 132,
396
.doc = "Debug mode", .group = 4 },
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
361
while((p = strsep(&arg, ",")) != NULL){
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
405
case 'g': /* --global-options */
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
365
if(not add_argument(getplugin(NULL, plugins), p)){
412
if(not add_argument(getplugin(NULL), plugin_option)){
366
413
perror("add_argument");
367
414
return ARGP_ERR_UNKNOWN;
419
case 'G': /* --global-env */
377
char *envdef = strdup(arg);
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
388
char *p_name = strsep(&arg, ":");
389
if(p_name[0] == '\0'){
392
char *opt = strsep(&arg, ":");
398
while((p = strsep(&opt, ",")) != NULL){
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
427
case 'o': /* --options-for */
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
442
case 'E': /* --env-for */
416
448
if(envdef == NULL){
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
452
if(not add_environment(getplugin(arg), envdef+1, true)){
425
453
perror("add_environment");
431
plugin *p = getplugin(arg, plugins);
457
case 'd': /* --disable */
459
plugin *p = getplugin(arg);
433
461
return ARGP_ERR_UNKNOWN;
435
463
p->disabled = true;
442
uid = (uid_t)strtol(arg, NULL, 10);
445
gid = (gid_t)strtol(arg, NULL, 10);
466
case 'e': /* --enable */
468
plugin *p = getplugin(arg);
470
return ARGP_ERR_UNKNOWN;
475
case 128: /* --plugin-dir */
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
482
case 129: /* --config-file */
483
/* This is already done by parse_opt_config_file() */
485
case 130: /* --userid */
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
496
case 131: /* --groupid */
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
507
case 132: /* --debug */
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
456
return ARGP_ERR_UNKNOWN;
461
plugin *plugin_list = NULL;
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
525
return ARGP_ERR_UNKNOWN;
530
/* This option parser is the same as parse_opt() above, except it
531
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
536
case 'g': /* --global-options */
537
case 'G': /* --global-env */
538
case 'o': /* --options-for */
539
case 'E': /* --env-for */
540
case 'd': /* --disable */
541
case 'e': /* --enable */
542
case 128: /* --plugin-dir */
544
case 129: /* --config-file */
546
argfile = strdup(arg);
551
case 130: /* --userid */
552
case 131: /* --groupid */
553
case 132: /* --debug */
558
return ARGP_ERR_UNKNOWN;
563
struct argp argp = { .options = options,
564
.parser = parse_opt_config_file,
465
566
.doc = "Mandos plugin runner -- Run plugins" };
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
468
if (ret == ARGP_ERR_UNKNOWN){
568
/* Parse using parse_opt_config_file() in order to get the custom
569
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
469
572
fprintf(stderr, "Unknown error while parsing arguments\n");
470
573
exitstatus = EXIT_FAILURE;
474
conffp = fopen(argfile, "r");
577
/* Reset to the normal argument parser */
578
argp.parser = parse_opt;
580
/* Open the configfile if available */
582
conffp = fopen(AFILE, "r");
584
conffp = fopen(argfile, "r");
475
586
if(conffp != NULL){
476
587
char *org_line = NULL;
477
588
char *p, *arg, *new_arg, *line;
480
590
const char whitespace_delims[] = " \r\t\f\v\n";
481
591
const char comment_delim[] = "#";
594
custom_argv = malloc(sizeof(char*) * 2);
595
if(custom_argv == NULL){
597
exitstatus = EXIT_FAILURE;
600
custom_argv[0] = argv[0];
601
custom_argv[1] = NULL;
603
/* for each line in the config file, strip whitespace and ignore
484
606
sret = getline(&org_line, &size, conffp);
490
612
arg = strsep(&line, comment_delim);
491
613
while((p = strsep(&arg, whitespace_delims)) != NULL){
495
617
new_arg = strdup(p);
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
620
exitstatus = EXIT_FAILURE;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
630
exitstatus = EXIT_FAILURE;
634
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
643
exitstatus = EXIT_FAILURE;
506
648
/* Check for harmful errors and go to fallback. Other errors might
507
649
not affect opening plugins */
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
510
652
exitstatus = EXIT_FAILURE;
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
515
658
if(custom_argv != NULL){
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
519
if (ret == ARGP_ERR_UNKNOWN){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
661
if(ret == ARGP_ERR_UNKNOWN){
520
662
fprintf(stderr, "Unknown error while parsing arguments\n");
521
663
exitstatus = EXIT_FAILURE;
668
/* Parse actual command line arguments, to let them override the
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
527
678
for(plugin *p = plugin_list; p != NULL; p=p->next){
528
679
fprintf(stderr, "Plugin: %s has %d arguments\n",
530
681
for(char **a = p->argv; *a != NULL; a++){
531
682
fprintf(stderr, "\tArg: %s\n", *a);
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
534
685
for(char **a = p->environ; *a != NULL; a++){
535
686
fprintf(stderr, "\t%s\n", *a);
691
/* Strip permissions down to nobody */
540
696
ret = setuid(uid);
542
698
perror("setuid");
550
dir = opendir(plugindir);
552
perror("Could not open plugin dir");
553
exitstatus = EXIT_FAILURE;
557
/* Set the FD_CLOEXEC flag on the directory, if possible */
701
/* Open plugin directory with close_on_exec flag */
559
int dir_fd = dirfd(dir);
561
ret = set_cloexec_flag(dir_fd);
563
perror("set_cloexec_flag");
564
exitstatus = EXIT_FAILURE;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
708
#else /* not O_CLOEXEC */
710
#endif /* not O_CLOEXEC */
713
dir_fd = open(plugindir, O_RDONLY |
716
#else /* not O_CLOEXEC */
718
#endif /* not O_CLOEXEC */
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
728
/* Set the FD_CLOEXEC flag on the directory */
729
ret = set_cloexec_flag(dir_fd);
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
736
#endif /* O_CLOEXEC */
738
dir = fdopendir(dir_fd);
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
570
747
FD_ZERO(&rfds_all);
749
/* Read and execute any executable in the plugin directory*/
573
dirst = readdir(dir);
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
575
// All directory entries have been processed
755
/* All directory entries have been processed */
576
756
if(dirst == NULL){
578
758
perror("readdir");
579
759
exitstatus = EXIT_FAILURE;
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
965
plugin *new_plugin = getplugin(dirst->d_name);
966
if(new_plugin == NULL){
968
ret = (int)(TEMP_FAILURE_RETRY
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
779
perror("sigprocmask");
972
perror("sigprocmask");
781
974
exitstatus = EXIT_FAILURE;
785
*new_process = (struct process){ .pid = pid,
787
.next = process_list };
789
process_list = new_process;
978
new_plugin->pid = pid;
979
new_plugin->fd = pipefd[0];
790
981
/* Unblock SIGCHLD so signal handler can be run if this process
791
982
has already completed */
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
984
&sigchld_action.sa_mask,
794
987
perror("sigprocmask");
795
988
exitstatus = EXIT_FAILURE;
799
FD_SET(new_process->fd, &rfds_all);
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
995
if(maxfd < new_plugin->fd){
996
maxfd = new_plugin->fd;
807
free_plugin_list(plugin_list);
1000
TEMP_FAILURE_RETRY(closedir(dir));
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1002
free_plugin(getplugin(NULL));
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1008
if(p->next == NULL){
1009
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1015
/* Main loop while running plugins exist */
819
1017
fd_set rfds = rfds_all;
820
1018
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
821
if (select_ret == -1){
1019
if(select_ret == -1 and errno != EINTR){
822
1020
perror("select");
823
1021
exitstatus = EXIT_FAILURE;
826
1024
/* OK, now either a process completed, or something can be read
827
1025
from one of them */
828
for(process *proc = process_list; proc ; proc = proc->next){
1026
for(plugin *proc = plugin_list; proc != NULL;){
829
1027
/* Is this process completely done? */
830
if(proc->eof and proc->completed){
1028
if(proc->completed and proc->eof){
831
1029
/* Only accept the plugin output if it exited cleanly */
832
1030
if(not WIFEXITED(proc->status)
833
1031
or WEXITSTATUS(proc->status) != 0){
834
1032
/* Bad exit by plugin */
836
1035
if(WIFEXITED(proc->status)){
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
1036
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1037
" status %d\n", proc->name,
1038
(intmax_t) (proc->pid),
839
1039
WEXITSTATUS(proc->status));
840
} else if(WIFSIGNALED(proc->status)) {
841
fprintf(stderr, "Plugin %u killed by signal %d\n",
842
(unsigned int) (proc->pid),
843
WTERMSIG(proc->status));
1040
} else if(WIFSIGNALED(proc->status)){
1041
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1042
" signal %d: %s\n", proc->name,
1043
(intmax_t) (proc->pid),
1044
WTERMSIG(proc->status),
1045
strsignal(WTERMSIG(proc->status)));
844
1046
} else if(WCOREDUMP(proc->status)){
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
849
1052
/* Remove the plugin */
850
FD_CLR(proc->fd, &rfds_all);
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
851
1056
/* Block signal while modifying process_list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1059
&sigchld_action.sa_mask,
854
1062
perror("sigprocmask");
855
1063
exitstatus = EXIT_FAILURE;
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
866
p->next = proc->next;
1067
plugin *next_plugin = proc->next;
871
1071
/* We are done modifying process list, so unblock signal */
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1072
ret = (int)(TEMP_FAILURE_RETRY
1073
(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask, NULL)));
875
1076
perror("sigprocmask");
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
1077
exitstatus = EXIT_FAILURE;
1081
if(plugin_list == NULL){
884
1088
/* This process exited nicely, so print its buffer */
886
1090
bool bret = print_out_password(proc->buffer,
887
1091
proc->buffer_length);
908
1116
proc->buffer_size += BUFFER_SIZE;
910
1118
/* Read from the process */
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1119
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1121
+ proc->buffer_length,
914
1124
/* Read error from this process; ignore the error */
919
1130
proc->eof = true;
921
proc->buffer_length += (size_t) ret;
1132
proc->buffer_length += (size_t) sret;
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
930
1141
/* Fallback if all plugins failed, none are found or an error
933
1144
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
934
1145
char *passwordbuffer = getpass("Password: ");
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1146
size_t len = strlen(passwordbuffer);
1147
/* Strip trailing newline */
1148
if(len > 0 and passwordbuffer[len-1] == '\n'){
1149
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1152
bret = print_out_password(passwordbuffer, len);
937
1154
perror("print_out_password");
938
1155
exitstatus = EXIT_FAILURE;
945
1162
perror("sigaction");
946
1163
exitstatus = EXIT_FAILURE;
949
1166
if(custom_argv != NULL){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1167
for(char **arg = custom_argv+1; *arg != NULL; arg++){
953
1170
free(custom_argv);
955
free_plugin_list(plugin_list);
957
1173
if(dir != NULL){
961
/* Free the process list and kill the processes */
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
1177
/* Kill the processes */
1178
for(plugin *p = plugin_list; p != NULL; p = p->next){
1181
ret = kill(p->pid, SIGTERM);
1182
if(ret == -1 and errno != ESRCH){
1183
/* Set-uid proccesses might not get closed */
970
free(process_list->buffer);
974
1189
/* Wait for any remaining child processes to terminate */
976
1191
ret = wait(NULL);
977
1192
} while(ret >= 0);
978
1193
if(errno != ECHILD){
982
1202
return exitstatus;