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,
55
typedef struct process{
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() */
66
#include <errno.h> /* errno, EBADF */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
69
#define BUFFER_SIZE 256
71
#define PDIR "/lib/mandos/plugins.d"
72
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
74
const char *argp_program_version = "plugin-runner " VERSION;
75
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*/
59
89
size_t buffer_size;
60
90
size_t buffer_length;
64
typedef struct plugin{
65
char *name; /* can be NULL or any plugin name */
92
volatile bool completed;
69
94
struct plugin *next;
72
plugin *getplugin(char *name, plugin **plugin_list){
73
for (plugin *p = *plugin_list; p != NULL; p = p->next){
75
or (p->name and name and (strcmp(p->name, name) == 0))){
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){
105
or (p->name and name and (strcmp(p->name, name) == 0))){
79
109
/* Create a new plugin */
80
110
plugin *new_plugin = malloc(sizeof(plugin));
81
if (new_plugin == NULL){
85
new_plugin->name = name;
111
if(new_plugin == NULL){
114
char *copy_name = NULL;
116
copy_name = strdup(name);
117
if(copy_name == NULL){
123
*new_plugin = (plugin) { .name = copy_name,
126
.next = plugin_list };
86
128
new_plugin->argv = malloc(sizeof(char *) * 2);
87
if (new_plugin->argv == NULL){
129
if(new_plugin->argv == NULL){
91
new_plugin->argv[0] = name;
134
new_plugin->argv[0] = copy_name;
92
135
new_plugin->argv[1] = NULL;
94
new_plugin->disabled = false;
95
new_plugin->next = *plugin_list;
137
new_plugin->environ = malloc(sizeof(char *));
138
if(new_plugin->environ == NULL){
140
free(new_plugin->argv);
144
new_plugin->environ[0] = NULL;
96
146
/* Append the new plugin to the list */
97
*plugin_list = new_plugin;
147
plugin_list = new_plugin;
98
148
return new_plugin;
101
void addargument(plugin *p, char *arg){
102
p->argv[p->argc] = arg;
103
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
104
if (p->argv == NULL){
109
p->argv[p->argc] = NULL;
151
/* Helper function for add_argument and add_environment */
152
static bool add_to_char_array(const char *new, char ***array,
154
/* Resize the pointed-to array to hold one more pointer */
155
*array = realloc(*array, sizeof(char *)
156
* (size_t) ((*len) + 2));
161
/* Make a copy of the new string */
162
char *copy = strdup(new);
166
/* Insert the copy */
167
(*array)[*len] = copy;
169
/* Add a new terminating NULL pointer to the last element */
170
(*array)[*len] = NULL;
174
/* Add to a plugin's argument vector */
175
static bool add_argument(plugin *p, const char *arg){
179
return add_to_char_array(arg, &(p->argv), &(p->argc));
182
/* Add to a plugin's environment */
183
static bool add_environment(plugin *p, const char *def, bool replace){
187
/* namelen = length of name of environment variable */
188
size_t namelen = (size_t)(strchrnul(def, '=') - def);
189
/* Search for this environment variable */
190
for(char **e = p->environ; *e != NULL; e++){
191
if(strncmp(*e, def, namelen + 1) == 0){
192
/* It already exists */
194
char *new = realloc(*e, strlen(def) + 1);
204
return add_to_char_array(def, &(p->environ), &(p->envc));
129
#define BUFFER_SIZE 256
131
const char *argp_program_version =
132
"plugbasedclient 0.9";
133
const char *argp_program_bug_address =
134
"<mandos@fukt.bsnet.se>";
223
/* Mark processes as completed when they exit, and save their exit
225
static void handle_sigchld(__attribute__((unused)) int sig){
227
plugin *proc = plugin_list;
229
pid_t pid = waitpid(-1, &status, WNOHANG);
231
/* Only still running child processes */
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
static 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);
136
304
int main(int argc, char *argv[]){
137
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
305
char *plugindir = NULL;
306
char *argfile = NULL;
138
308
size_t d_name_len;
140
310
struct dirent *dirst;
144
process *process_list = NULL;
313
int ret, numchars, maxfd = 0;
145
318
bool debug = false;
146
319
int exitstatus = EXIT_SUCCESS;
320
struct sigaction old_sigchld_action;
321
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
322
.sa_flags = SA_NOCLDSTOP };
323
char **custom_argv = NULL;
326
/* Establish a signal handler */
327
sigemptyset(&sigchld_action.sa_mask);
328
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
331
exitstatus = EXIT_FAILURE;
334
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
337
exitstatus = EXIT_FAILURE;
148
341
/* The options we understand. */
149
342
struct argp_option options[] = {
150
343
{ .name = "global-options", .key = 'g',
151
344
.arg = "OPTION[,OPTION[,...]]",
152
345
.doc = "Options passed to all plugins" },
346
{ .name = "global-env", .key = 'G',
348
.doc = "Environment variable passed to all plugins" },
153
349
{ .name = "options-for", .key = 'o',
154
350
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
155
351
.doc = "Options passed only to specified plugin" },
352
{ .name = "env-for", .key = 'E',
353
.arg = "PLUGIN:ENV=value",
354
.doc = "Environment variable passed to specified plugin" },
156
355
{ .name = "disable", .key = 'd',
158
357
.doc = "Disable a specific plugin", .group = 1 },
358
{ .name = "enable", .key = 'e',
360
.doc = "Enable a specific plugin", .group = 1 },
159
361
{ .name = "plugin-dir", .key = 128,
160
362
.arg = "DIRECTORY",
161
363
.doc = "Specify a different plugin directory", .group = 2 },
162
{ .name = "debug", .key = 129,
163
.doc = "Debug mode", .group = 3 },
364
{ .name = "config-file", .key = 129,
366
.doc = "Specify a different configuration file", .group = 2 },
367
{ .name = "userid", .key = 130,
368
.arg = "ID", .flags = 0,
369
.doc = "User ID the plugins will run as", .group = 3 },
370
{ .name = "groupid", .key = 131,
371
.arg = "ID", .flags = 0,
372
.doc = "Group ID the plugins will run as", .group = 3 },
373
{ .name = "debug", .key = 132,
374
.doc = "Debug mode", .group = 4 },
167
error_t parse_opt (int key, char *arg, struct argp_state *state) {
168
/* Get the INPUT argument from `argp_parse', which we
169
know is a pointer to our plugin list pointer. */
170
plugin **plugins = state->input;
174
char *p = strtok(arg, ",");
176
addargument(getplugin(NULL, plugins), p);
177
p = strtok(NULL, ",");
183
char *name = strtok(arg, ":");
184
char *p = strtok(NULL, ":");
188
addargument(getplugin(name, plugins), p);
189
p = strtok(NULL, ",");
196
getplugin(arg, plugins)->disabled = true;
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
381
case 'g': /* --global-options */
384
while((p = strsep(&arg, ",")) != NULL){
388
if(not add_argument(getplugin(NULL), p)){
389
perror("add_argument");
390
return ARGP_ERR_UNKNOWN;
395
case 'G': /* --global-env */
399
if(not add_environment(getplugin(NULL), arg, true)){
400
perror("add_environment");
403
case 'o': /* --options-for */
405
char *p_name = strsep(&arg, ":");
406
if(p_name[0] == '\0' or arg == NULL){
409
char *opt = strsep(&arg, ":");
410
if(opt[0] == '\0' or opt == NULL){
414
while((p = strsep(&opt, ",")) != NULL){
418
if(not add_argument(getplugin(p_name), p)){
419
perror("add_argument");
420
return ARGP_ERR_UNKNOWN;
425
case 'E': /* --env-for */
430
char *envdef = strchr(arg, ':');
435
if(not add_environment(getplugin(arg), envdef+1, true)){
436
perror("add_environment");
440
case 'd': /* --disable */
442
plugin *p = getplugin(arg);
444
return ARGP_ERR_UNKNOWN;
449
case 'e': /* --enable */
451
plugin *p = getplugin(arg);
453
return ARGP_ERR_UNKNOWN;
458
case 128: /* --plugin-dir */
460
plugindir = strdup(arg);
461
if(plugindir == NULL){
465
case 129: /* --config-file */
466
/* This is already done by parse_opt_config_file() */
468
case 130: /* --userid */
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
478
case 131: /* --groupid */
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
488
case 132: /* --debug */
211
return ARGP_ERR_UNKNOWN;
216
plugin *plugin_list = NULL;
218
struct argp argp = { .options = options, .parser = parse_opt,
492
* When adding more options before this line, remember to also add a
493
* "case" to the "parse_opt_config_file" function below.
496
/* Cryptsetup always passes an argument, which is an empty
497
string if "none" was specified in /etc/crypttab. So if
498
argument was empty, we ignore it silently. */
500
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
506
return ARGP_ERR_UNKNOWN;
511
/* This option parser is the same as parse_opt() above, except it
512
ignores everything but the --config-file option. */
513
error_t parse_opt_config_file(int key, char *arg,
514
__attribute__((unused))
515
struct argp_state *state) {
517
case 'g': /* --global-options */
518
case 'G': /* --global-env */
519
case 'o': /* --options-for */
520
case 'E': /* --env-for */
521
case 'd': /* --disable */
522
case 'e': /* --enable */
523
case 128: /* --plugin-dir */
525
case 129: /* --config-file */
527
argfile = strdup(arg);
532
case 130: /* --userid */
533
case 131: /* --groupid */
534
case 132: /* --debug */
539
return ARGP_ERR_UNKNOWN;
544
struct argp argp = { .options = options,
545
.parser = parse_opt_config_file,
220
547
.doc = "Mandos plugin runner -- Run plugins" };
222
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
549
/* Parse using parse_opt_config_file() in order to get the custom
550
config file location, if any. */
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
553
fprintf(stderr, "Unknown error while parsing arguments\n");
554
exitstatus = EXIT_FAILURE;
558
/* Reset to the normal argument parser */
559
argp.parser = parse_opt;
561
/* Open the configfile if available */
563
conffp = fopen(AFILE, "r");
565
conffp = fopen(argfile, "r");
568
char *org_line = NULL;
569
char *p, *arg, *new_arg, *line;
571
const char whitespace_delims[] = " \r\t\f\v\n";
572
const char comment_delim[] = "#";
575
custom_argv = malloc(sizeof(char*) * 2);
576
if(custom_argv == NULL){
578
exitstatus = EXIT_FAILURE;
581
custom_argv[0] = argv[0];
582
custom_argv[1] = NULL;
584
/* for each line in the config file, strip whitespace and ignore
587
sret = getline(&org_line, &size, conffp);
593
arg = strsep(&line, comment_delim);
594
while((p = strsep(&arg, whitespace_delims)) != NULL){
601
exitstatus = EXIT_FAILURE;
607
custom_argv = realloc(custom_argv, sizeof(char *)
608
* ((unsigned int) custom_argc + 1));
609
if(custom_argv == NULL){
611
exitstatus = EXIT_FAILURE;
615
custom_argv[custom_argc-1] = new_arg;
616
custom_argv[custom_argc] = NULL;
621
/* Check for harmful errors and go to fallback. Other errors might
622
not affect opening plugins */
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
exitstatus = EXIT_FAILURE;
629
/* If there was any arguments from configuration file,
630
pass them to parser as command arguments */
631
if(custom_argv != NULL){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
if(ret == ARGP_ERR_UNKNOWN){
635
fprintf(stderr, "Unknown error while parsing arguments\n");
636
exitstatus = EXIT_FAILURE;
641
/* Parse actual command line arguments, to let them override the
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
645
fprintf(stderr, "Unknown error while parsing arguments\n");
646
exitstatus = EXIT_FAILURE;
225
651
for(plugin *p = plugin_list; p != NULL; p=p->next){
762
if(plugindir == NULL){
763
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
765
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
315
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
316
if (filename == NULL){
318
exitstatus = EXIT_FAILURE;
772
ret = stat(filename, &st);
321
strcpy(filename, plugindir);
322
strcat(filename, "/");
323
strcat(filename, dirst->d_name);
327
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
779
/* Ignore non-executable files */
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
329
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
330
783
" with bad type or mode\n", filename);
334
if(getplugin(dirst->d_name, &plugin_list)->disabled){
789
plugin *p = getplugin(dirst->d_name);
336
797
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
341
plugin *p = getplugin(dirst->d_name, &plugin_list);
343
804
/* Add global arguments to argument list for this plugin */
344
plugin *g = getplugin(NULL, &plugin_list);
345
for(char **a = g->argv + 1; *a != NULL; a++){
805
plugin *g = getplugin(NULL);
807
for(char **a = g->argv + 1; *a != NULL; a++){
808
if(not add_argument(p, *a)){
809
perror("add_argument");
812
/* Add global environment variables */
813
for(char **e = g->environ; *e != NULL; e++){
814
if(not add_environment(p, *e, false)){
815
perror("add_environment");
820
/* If this plugin has any environment variables, we will call
821
using execve and need to duplicate the environment from this
823
if(p->environ[0] != NULL){
824
for(char **e = environ; *e != NULL; e++){
825
if(not add_environment(p, *e, false)){
826
perror("add_environment");
350
832
ret = pipe(pipefd);
353
835
exitstatus = EXIT_FAILURE;
838
/* Ask OS to automatic close the pipe on exec */
356
839
ret = set_cloexec_flag(pipefd[0]);
358
841
perror("set_cloexec_flag");
359
842
exitstatus = EXIT_FAILURE;
362
845
ret = set_cloexec_flag(pipefd[1]);
364
847
perror("set_cloexec_flag");
365
848
exitstatus = EXIT_FAILURE;
368
// Starting a new process to be watched
851
/* Block SIGCHLD until process is safely in process list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
858
/* Starting a new process to be watched */
369
859
pid_t pid = fork();
862
exitstatus = EXIT_FAILURE;
371
866
/* this is the child process */
372
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
867
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
872
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
874
perror("sigprocmask");
878
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
374
884
if(dirfd(dir) < 0){
375
885
/* If dir has no file descriptor, we could not set FD_CLOEXEC
376
and must close it manually */
886
above and must now close it manually here. */
379
if(execv(filename, p->argv) < 0){
889
if(p->environ[0] == NULL){
890
if(execv(filename, p->argv) < 0){
895
if(execve(filename, p->argv, p->environ) < 0){
386
close(pipefd[1]); /* close unused write end of pipe */
387
process *new_process = malloc(sizeof(process));
388
if (new_process == NULL){
390
exitstatus = EXIT_FAILURE;
394
*new_process = (struct process){ .pid = pid,
396
.next = process_list };
397
FD_SET(new_process->fd, &rfds_all);
399
if (maxfd < new_process->fd){
400
maxfd = new_process->fd;
404
process_list = new_process;
407
/* Free the plugin list */
408
for(plugin *next; plugin_list != NULL; plugin_list = next){
409
next = plugin_list->next;
410
free(plugin_list->argv);
903
close(pipefd[1]); /* Close unused write end of pipe */
905
plugin *new_plugin = getplugin(dirst->d_name);
906
if(new_plugin == NULL){
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
910
perror("sigprocmask");
912
exitstatus = EXIT_FAILURE;
916
new_plugin->pid = pid;
917
new_plugin->fd = pipefd[0];
919
/* Unblock SIGCHLD so signal handler can be run if this process
920
has already completed */
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
923
perror("sigprocmask");
924
exitstatus = EXIT_FAILURE;
928
FD_SET(new_plugin->fd, &rfds_all);
930
if(maxfd < new_plugin->fd){
931
maxfd = new_plugin->fd;
416
if (process_list == NULL){
417
fprintf(stderr, "No plugin processes started, exiting\n");
938
for(plugin *p = plugin_list; p != NULL; p = p->next){
943
fprintf(stderr, "No plugin processes started. Incorrect plugin"
949
/* Main loop while running plugins exist */
421
951
fd_set rfds = rfds_all;
422
952
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
423
if (select_ret == -1){
953
if(select_ret == -1){
424
954
perror("select");
425
955
exitstatus = EXIT_FAILURE;
428
for(process *proc = process_list; proc ; proc = proc->next){
429
if(not FD_ISSET(proc->fd, &rfds)){
958
/* OK, now either a process completed, or something can be read
960
for(plugin *proc = plugin_list; proc != NULL;){
961
/* Is this process completely done? */
962
if(proc->eof and proc->completed){
963
/* Only accept the plugin output if it exited cleanly */
964
if(not WIFEXITED(proc->status)
965
or WEXITSTATUS(proc->status) != 0){
966
/* Bad exit by plugin */
969
if(WIFEXITED(proc->status)){
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
972
WEXITSTATUS(proc->status));
973
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
976
WTERMSIG(proc->status));
977
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
983
/* Remove the plugin */
984
FD_CLR(proc->fd, &rfds_all);
986
/* Block signal while modifying process_list */
987
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
989
perror("sigprocmask");
990
exitstatus = EXIT_FAILURE;
994
plugin *next_plugin = proc->next;
998
/* We are done modifying process list, so unblock signal */
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
perror("sigprocmask");
1003
exitstatus = EXIT_FAILURE;
1007
if(plugin_list == NULL){
1014
/* This process exited nicely, so print its buffer */
1016
bool bret = print_out_password(proc->buffer,
1017
proc->buffer_length);
1019
perror("print_out_password");
1020
exitstatus = EXIT_FAILURE;
1025
/* This process has not completed. Does it have any output? */
1026
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1027
/* This process had nothing to say at this time */
1031
/* Before reading, make the process' data buffer large enough */
432
1032
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
433
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
434
1034
+ (size_t) BUFFER_SIZE);
435
if (proc->buffer == NULL){
1035
if(proc->buffer == NULL){
436
1036
perror("malloc");
437
1037
exitstatus = EXIT_FAILURE;
440
1040
proc->buffer_size += BUFFER_SIZE;
442
ret = read(proc->fd, proc->buffer + proc->buffer_length,
445
/* Read error from this process; ignore it */
1042
/* Read from the process */
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1046
/* Read error from this process; ignore the error */
448
proc->buffer_length += (size_t) ret;
451
/* wait for process exit */
453
waitpid(proc->pid, &status, 0);
454
if(not WIFEXITED(status) or WEXITSTATUS(status) != 0){
455
FD_CLR(proc->fd, &rfds_all);
458
for(size_t written = 0;
459
written < proc->buffer_length; written += (size_t)ret){
460
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
461
proc->buffer + written,
466
exitstatus = EXIT_FAILURE;
476
for(process *next; process_list != NULL; process_list = next){
477
close(process_list->fd);
478
kill(process_list->pid, SIGTERM);
479
free(process_list->buffer);
1054
proc->buffer_length += (size_t) sret;
1062
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1063
/* Fallback if all plugins failed, none are found or an error
1066
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1067
char *passwordbuffer = getpass("Password: ");
1068
size_t len = strlen(passwordbuffer);
1069
/* Strip trailing newline */
1070
if(len > 0 and passwordbuffer[len-1] == '\n'){
1071
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1074
bret = print_out_password(passwordbuffer, len);
1076
perror("print_out_password");
1077
exitstatus = EXIT_FAILURE;
1081
/* Restore old signal handler */
1082
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1084
perror("sigaction");
1085
exitstatus = EXIT_FAILURE;
1088
if(custom_argv != NULL){
1089
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1099
/* Kill the processes */
1100
for(plugin *p = plugin_list; p != NULL; p = p->next){
1103
ret = kill(p->pid, SIGTERM);
1104
if(ret == -1 and errno != ESRCH){
1105
/* Set-uid proccesses might not get closed */
1111
/* Wait for any remaining child processes to terminate */
1115
if(errno != ECHILD){
493
1124
return exitstatus;