38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
56
#include <string.h> /* strsep, strlen(), asprintf(),
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
61
58
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
64
60
#include <signal.h> /* struct sigaction, sigemptyset(),
65
61
sigaddset(), sigaction(),
66
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
63
SIG_UNBLOCK, kill() */
69
64
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
73
66
#define BUFFER_SIZE 256
75
#define PDIR "/lib/mandos/plugins.d"
76
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
78
const char *argp_program_version = "plugin-runner " VERSION;
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
const char *argp_program_version = "plugin-runner 1.0";
79
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
typedef struct process{
81
86
typedef struct plugin{
82
87
char *name; /* can be NULL or any plugin name */
206
165
/* Add to a plugin's environment */
207
static bool add_environment(plugin *p, const char *def, bool replace){
166
static bool add_environment(plugin *p, const char *def){
211
/* namelen = length of name of environment variable */
212
size_t namelen = (size_t)(strchrnul(def, '=') - def);
213
/* Search for this environment variable */
214
for(char **e = p->environ; *e != NULL; e++){
215
if(strncmp(*e, def, namelen + 1) == 0){
216
/* It already exists */
220
new = realloc(*e, strlen(def) + 1);
221
} while(new == NULL and errno == EINTR);
231
170
return add_to_char_array(def, &(p->environ), &(p->envc));
235
175
* Based on the example in the GNU LibC manual chapter 13.13 "File
236
176
* Descriptor Flags".
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
177
* *Note File Descriptor Flags:(libc)Descriptor Flags.
239
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
179
static int set_cloexec_flag(int fd)
181
int ret = fcntl(fd, F_GETFD, 0);
241
182
/* If reading the flags failed, return error indication now. */
245
186
/* Store modified flag word in the descriptor. */
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
190
process *process_list = NULL;
251
/* Mark processes as completed when they exit, and save their exit
192
/* Mark a process as completed when it exits, and save its exit
253
static void handle_sigchld(__attribute__((unused)) int sig){
254
int old_errno = errno;
256
plugin *proc = plugin_list;
258
pid_t pid = waitpid(-1, &status, WNOHANG);
260
/* Only still running child processes */
265
/* No child processes */
271
/* A child exited, find it in process_list */
272
while(proc != NULL and proc->pid != pid){
276
/* Process not found in process list */
279
proc->status = status;
194
void handle_sigchld(__attribute__((unused)) int sig){
195
process *proc = process_list;
197
pid_t pid = wait(&status);
202
while(proc != NULL and proc->pid != pid){
206
/* Process not found in process list */
209
proc->status = status;
210
proc->completed = true;
285
/* Prints out a password to stdout */
286
static bool print_out_password(const char *buffer, size_t length){
213
bool print_out_password(const char *buffer, size_t length){
215
if(length>0 and buffer[length-1] == '\n'){
288
218
for(size_t written = 0; written < length; written += (size_t)ret){
289
219
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
290
220
length - written));
372
284
{ .name = "global-options", .key = 'g',
373
285
.arg = "OPTION[,OPTION[,...]]",
374
286
.doc = "Options passed to all plugins" },
375
{ .name = "global-env", .key = 'G',
287
{ .name = "global-envs", .key = 'e',
376
288
.arg = "VAR=value",
377
289
.doc = "Environment variable passed to all plugins" },
378
290
{ .name = "options-for", .key = 'o',
379
291
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
380
292
.doc = "Options passed only to specified plugin" },
381
{ .name = "env-for", .key = 'E',
293
{ .name = "envs-for", .key = 'f',
382
294
.arg = "PLUGIN:ENV=value",
383
295
.doc = "Environment variable passed to specified plugin" },
384
296
{ .name = "disable", .key = 'd',
386
298
.doc = "Disable a specific plugin", .group = 1 },
387
{ .name = "enable", .key = 'e',
389
.doc = "Enable a specific plugin", .group = 1 },
390
299
{ .name = "plugin-dir", .key = 128,
391
300
.arg = "DIRECTORY",
392
301
.doc = "Specify a different plugin directory", .group = 2 },
393
{ .name = "config-file", .key = 129,
395
.doc = "Specify a different configuration file", .group = 2 },
396
{ .name = "userid", .key = 130,
397
.arg = "ID", .flags = 0,
398
.doc = "User ID the plugins will run as", .group = 3 },
399
{ .name = "groupid", .key = 131,
400
.arg = "ID", .flags = 0,
401
.doc = "Group ID the plugins will run as", .group = 3 },
402
{ .name = "debug", .key = 132,
403
.doc = "Debug mode", .group = 4 },
405
* These reproduce what we would get without ARGP_NO_HELP
407
{ .name = "help", .key = '?',
408
.doc = "Give this help list", .group = -1 },
409
{ .name = "usage", .key = -3,
410
.doc = "Give a short usage message", .group = -1 },
411
{ .name = "version", .key = 'V',
412
.doc = "Print program version", .group = -1 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
416
error_t parse_opt(int key, char *arg, struct argp_state *state){
421
case 'g': /* --global-options */
424
while((plugin_option = strsep(&arg, ",")) != NULL){
425
if(not add_argument(getplugin(NULL), plugin_option)){
431
case 'G': /* --global-env */
432
add_environment(getplugin(NULL), arg, true);
434
case 'o': /* --options-for */
436
char *option_list = strchr(arg, ':');
437
if(option_list == NULL){
438
argp_error(state, "No colon in \"%s\"", arg);
445
argp_error(state, "Empty plugin name");
450
while((option = strsep(&option_list, ",")) != NULL){
451
if(not add_argument(getplugin(arg), option)){
457
case 'E': /* --env-for */
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
321
while((p = strsep(&arg, ",")) != NULL){
325
if(not add_argument(getplugin(NULL, plugins), p)){
326
perror("add_argument");
327
return ARGP_ERR_UNKNOWN;
337
char *envdef = strdup(arg);
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
352
char *opt = strsep(&arg, ":");
358
while((p = strsep(&opt, ",")) != NULL){
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
459
375
char *envdef = strchr(arg, ':');
460
376
if(envdef == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
468
argp_error(state, "Empty plugin name");
472
add_environment(getplugin(arg), envdef, true);
475
case 'd': /* --disable */
477
plugin *p = getplugin(arg);
483
case 'e': /* --enable */
485
plugin *p = getplugin(arg);
491
case 128: /* --plugin-dir */
493
plugindir = strdup(arg);
495
case 129: /* --config-file */
496
/* This is already done by parse_opt_config_file() */
498
case 130: /* --userid */
499
tmpmax = strtoimax(arg, &tmp, 10);
500
if(errno != 0 or tmp == arg or *tmp != '\0'
501
or tmpmax != (uid_t)tmpmax){
502
argp_error(state, "Bad user ID number: \"%s\", using %"
503
PRIdMAX, arg, (intmax_t)uid);
508
case 131: /* --groupid */
509
tmpmax = strtoimax(arg, &tmp, 10);
510
if(errno != 0 or tmp == arg or *tmp != '\0'
511
or tmpmax != (gid_t)tmpmax){
512
argp_error(state, "Bad group ID number: \"%s\", using %"
513
PRIdMAX, arg, (intmax_t)gid);
518
case 132: /* --debug */
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
385
perror("add_environment");
391
plugin *p = getplugin(arg, plugins);
393
return ARGP_ERR_UNKNOWN;
402
uid = (uid_t)strtol(arg, NULL, 10);
405
gid = (gid_t)strtol(arg, NULL, 10);
522
* These reproduce what we would get without ARGP_NO_HELP
524
case '?': /* --help */
525
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
526
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
527
case -3: /* --usage */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream,
530
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
531
case 'V': /* --version */
532
fprintf(state->out_stream, "%s\n", argp_program_version);
536
* When adding more options before this line, remember to also add a
537
* "case" to the "parse_opt_config_file" function below.
540
/* Cryptsetup always passes an argument, which is an empty
541
string if "none" was specified in /etc/crypttab. So if
542
argument was empty, we ignore it silently. */
547
return ARGP_ERR_UNKNOWN;
549
return errno; /* Set to 0 at start */
552
/* This option parser is the same as parse_opt() above, except it
553
ignores everything but the --config-file option. */
554
error_t parse_opt_config_file(int key, char *arg,
555
__attribute__((unused))
556
struct argp_state *state){
559
case 'g': /* --global-options */
560
case 'G': /* --global-env */
561
case 'o': /* --options-for */
562
case 'E': /* --env-for */
563
case 'd': /* --disable */
564
case 'e': /* --enable */
565
case 128: /* --plugin-dir */
567
case 129: /* --config-file */
569
argfile = strdup(arg);
571
case 130: /* --userid */
572
case 131: /* --groupid */
573
case 132: /* --debug */
574
case '?': /* --help */
575
case -3: /* --usage */
576
case 'V': /* --version */
580
return ARGP_ERR_UNKNOWN;
585
struct argp argp = { .options = options,
586
.parser = parse_opt_config_file,
411
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
416
return ARGP_ERR_UNKNOWN;
421
plugin *plugin_list = NULL;
423
struct argp argp = { .options = options, .parser = parse_opt,
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
588
425
.doc = "Mandos plugin runner -- Run plugins" };
590
/* Parse using parse_opt_config_file() in order to get the custom
591
config file location, if any. */
592
ret = argp_parse(&argp, argc, argv,
593
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
601
perror("argp_parse");
602
exitstatus = EX_OSERR;
605
exitstatus = EX_USAGE;
609
/* Reset to the normal argument parser */
610
argp.parser = parse_opt;
612
/* Open the configfile if available */
614
conffp = fopen(AFILE, "r");
616
conffp = fopen(argfile, "r");
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
428
if (ret == ARGP_ERR_UNKNOWN){
429
fprintf(stderr, "Unknown error while parsing arguments\n");
430
exitstatus = EXIT_FAILURE;
434
conffp = fopen(argfile, "r");
618
435
if(conffp != NULL){
619
436
char *org_line = NULL;
620
439
char *p, *arg, *new_arg, *line;
622
440
const char whitespace_delims[] = " \r\t\f\v\n";
623
441
const char comment_delim[] = "#";
626
custom_argv = malloc(sizeof(char*) * 2);
627
if(custom_argv == NULL){
629
exitstatus = EXIT_FAILURE;
632
custom_argv[0] = argv[0];
633
custom_argv[1] = NULL;
635
/* for each line in the config file, strip whitespace and ignore
638
444
sret = getline(&org_line, &size, conffp);
644
450
arg = strsep(&line, comment_delim);
645
451
while((p = strsep(&arg, whitespace_delims)) != NULL){
732
489
for(char **a = p->argv; *a != NULL; a++){
733
490
fprintf(stderr, "\tArg: %s\n", *a);
735
fprintf(stderr, "...and %d environment variables\n", p->envc);
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
736
493
for(char **a = p->environ; *a != NULL; a++){
737
494
fprintf(stderr, "\t%s\n", *a);
742
/* Strip permissions down to nobody */
745
506
perror("setgid");
509
dir = opendir(plugindir);
511
perror("Could not open plugin dir");
512
exitstatus = EXIT_FAILURE;
752
/* Open plugin directory with close_on_exec flag */
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
755
if(plugindir == NULL){
756
dir_fd = open(PDIR, O_RDONLY |
759
#else /* not O_CLOEXEC */
761
#endif /* not O_CLOEXEC */
764
dir_fd = open(plugindir, O_RDONLY |
767
#else /* not O_CLOEXEC */
769
#endif /* not O_CLOEXEC */
773
perror("Could not open plugin dir");
774
exitstatus = EXIT_FAILURE;
779
/* Set the FD_CLOEXEC flag on the directory */
780
ret = set_cloexec_flag(dir_fd);
782
perror("set_cloexec_flag");
783
TEMP_FAILURE_RETRY(close(dir_fd));
784
exitstatus = EXIT_FAILURE;
787
#endif /* O_CLOEXEC */
789
dir = fdopendir(dir_fd);
791
perror("Could not open plugin dir");
792
TEMP_FAILURE_RETRY(close(dir_fd));
793
exitstatus = EXIT_FAILURE;
518
int dir_fd = dirfd(dir);
520
ret = set_cloexec_flag(dir_fd);
522
perror("set_cloexec_flag");
523
exitstatus = EXIT_FAILURE;
798
529
FD_ZERO(&rfds_all);
800
/* Read and execute any executable in the plugin directory*/
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
532
dirst = readdir(dir);
806
/* All directory entries have been processed */
534
// All directory entries have been processed
807
535
if(dirst == NULL){
809
537
perror("readdir");
810
538
exitstatus = EXIT_FAILURE;
816
544
d_name_len = strlen(dirst->d_name);
818
/* Ignore dotfiles, backup files and other junk */
546
// Ignore dotfiles, backup files and other junk
820
548
bool bad_name = false;
1012
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1016
plugin *new_plugin = getplugin(dirst->d_name);
1017
if(new_plugin == NULL){
1018
perror("getplugin");
1019
ret = (int)(TEMP_FAILURE_RETRY
1020
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1023
perror("sigprocmask");
738
perror("sigprocmask");
1025
740
exitstatus = EXIT_FAILURE;
1029
new_plugin->pid = pid;
1030
new_plugin->fd = pipefd[0];
744
*new_process = (struct process){ .pid = pid,
746
.next = process_list };
748
process_list = new_process;
1032
749
/* Unblock SIGCHLD so signal handler can be run if this process
1033
750
has already completed */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1038
753
perror("sigprocmask");
1039
754
exitstatus = EXIT_FAILURE;
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1046
if(maxfd < new_plugin->fd){
1047
maxfd = new_plugin->fd;
1051
TEMP_FAILURE_RETRY(closedir(dir));
758
FD_SET(new_process->fd, &rfds_all);
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
1053
free_plugin(getplugin(NULL));
1055
for(plugin *p = plugin_list; p != NULL; p = p->next){
1059
if(p->next == NULL){
1060
fprintf(stderr, "No plugin processes started. Incorrect plugin"
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1066
/* Main loop while running plugins exist */
1068
787
fd_set rfds = rfds_all;
1069
788
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1070
if(select_ret == -1 and errno != EINTR){
789
if (select_ret == -1){
1071
790
perror("select");
1072
791
exitstatus = EXIT_FAILURE;
1075
794
/* OK, now either a process completed, or something can be read
1076
795
from one of them */
1077
for(plugin *proc = plugin_list; proc != NULL;){
796
for(process *proc = process_list; proc ; proc = proc->next){
1078
797
/* Is this process completely done? */
1079
if(proc->completed and proc->eof){
798
if(proc->eof and proc->completed){
1080
799
/* Only accept the plugin output if it exited cleanly */
1081
800
if(not WIFEXITED(proc->status)
1082
801
or WEXITSTATUS(proc->status) != 0){
1083
802
/* Bad exit by plugin */
1086
804
if(WIFEXITED(proc->status)){
1087
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1088
" status %d\n", proc->name,
1089
(intmax_t) (proc->pid),
805
fprintf(stderr, "Plugin %u exited with status %d\n",
806
(unsigned int) (proc->pid),
1090
807
WEXITSTATUS(proc->status));
1091
} else if(WIFSIGNALED(proc->status)){
1092
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1093
" signal %d: %s\n", proc->name,
1094
(intmax_t) (proc->pid),
1095
WTERMSIG(proc->status),
1096
strsignal(WTERMSIG(proc->status)));
808
} else if(WIFSIGNALED(proc->status)) {
809
fprintf(stderr, "Plugin %u killed by signal %d\n",
810
(unsigned int) (proc->pid),
811
WTERMSIG(proc->status));
1097
812
} else if(WCOREDUMP(proc->status)){
1098
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
" core\n", proc->name, (intmax_t) (proc->pid));
813
fprintf(stderr, "Plugin %d dumped core\n",
814
(unsigned int) (proc->pid));
1103
817
/* Remove the plugin */
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
818
FD_CLR(proc->fd, &rfds_all);
1107
819
/* Block signal while modifying process_list */
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1110
&sigchld_action.sa_mask,
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1113
822
perror("sigprocmask");
1114
823
exitstatus = EXIT_FAILURE;
1118
plugin *next_plugin = proc->next;
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
834
p->next = proc->next;
1122
839
/* We are done modifying process list, so unblock signal */
1123
ret = (int)(TEMP_FAILURE_RETRY
1124
(sigprocmask(SIG_UNBLOCK,
1125
&sigchld_action.sa_mask, NULL)));
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1127
843
perror("sigprocmask");
1128
exitstatus = EXIT_FAILURE;
1132
if(plugin_list == NULL){
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
1139
852
/* This process exited nicely, so print its buffer */
1141
bool bret = print_out_password(proc->buffer,
1142
proc->buffer_length);
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1144
856
perror("print_out_password");
1145
857
exitstatus = EXIT_FAILURE;
1150
861
/* This process has not completed. Does it have any output? */
1151
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
863
/* This process had nothing to say at this time */
1158
866
/* Before reading, make the process' data buffer large enough */
1159
867
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1160
868
proc->buffer = realloc(proc->buffer, proc->buffer_size
1161
869
+ (size_t) BUFFER_SIZE);
1162
if(proc->buffer == NULL){
870
if (proc->buffer == NULL){
1163
871
perror("malloc");
1164
872
exitstatus = EXIT_FAILURE;
1167
875
proc->buffer_size += BUFFER_SIZE;
1169
877
/* Read from the process */
1170
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1172
+ proc->buffer_length,
878
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1175
881
/* Read error from this process; ignore the error */
1181
886
proc->eof = true;
1183
proc->buffer_length += (size_t) sret;
888
proc->buffer_length += (size_t) ret;
1191
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1192
/* Fallback if all plugins failed, none are found or an error
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
1195
899
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1196
900
char *passwordbuffer = getpass("Password: ");
1197
size_t len = strlen(passwordbuffer);
1198
/* Strip trailing newline */
1199
if(len > 0 and passwordbuffer[len-1] == '\n'){
1200
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1203
bret = print_out_password(passwordbuffer, len);
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1205
903
perror("print_out_password");
1206
904
exitstatus = EXIT_FAILURE;
1210
909
/* Restore old signal handler */
1211
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1213
perror("sigaction");
1214
exitstatus = EXIT_FAILURE;
1217
if(custom_argv != NULL){
1218
for(char **arg = custom_argv+1; *arg != NULL; arg++){
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
923
free(plugin_list->environ);
1224
927
if(dir != NULL){
1228
/* Kill the processes */
1229
for(plugin *p = plugin_list; p != NULL; p = p->next){
1232
ret = kill(p->pid, SIGTERM);
1233
if(ret == -1 and errno != ESRCH){
1234
/* Set-uid proccesses might not get closed */
931
/* Free the process list and kill the processes */
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
940
free(process_list->buffer);
1240
944
/* Wait for any remaining child processes to terminate */
1242
946
ret = wait(NULL);
1243
947
} while(ret >= 0);
1244
948
if(errno != ECHILD){
1253
952
return exitstatus;