19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
26
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO, fclose() */
33
#include <sys/types.h> /* fstat(), struct stat, waitpid(),
34
WIFEXITED(), WEXITSTATUS(), wait(),
35
pid_t, uid_t, gid_t, getuid(),
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
37
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
38
FD_SET(), FD_ISSET(), FD_CLR */
39
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG() */
41
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
42
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* struct dirent, scandirat() */
44
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
45
FD_CLOEXEC, write(), STDOUT_FILENO,
46
struct stat, fstat(), close(),
47
setgid(), setuid(), S_ISREG(),
48
faccessat() pipe2(), fork(),
49
_exit(), dup2(), fexecve(), read()
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
52
FD_CLOEXEC, openat(), scandirat(),
54
#include <string.h> /* strsep, strlen(), strsignal(),
55
strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
55
#include <errno.h> /* errno */
57
56
#include <argp.h> /* struct argp_option, struct
58
57
argp_state, struct argp,
106
99
/* Gets an existing plugin based on name,
107
100
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
101
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
or (p->name and name and (strcmp(p->name, name) == 0))){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
117
109
/* Create a new plugin */
118
plugin *new_plugin = NULL;
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
122
if(new_plugin == NULL){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
125
114
char *copy_name = NULL;
126
115
if(name != NULL){
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
130
117
if(copy_name == NULL){
138
*new_plugin = (plugin){ .name = copy_name,
141
.next = plugin_list };
122
*new_plugin = (plugin) { .name = copy_name,
125
.next = plugin_list };
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
149
130
free(new_plugin);
153
133
new_plugin->argv[0] = copy_name;
154
134
new_plugin->argv[1] = NULL;
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
159
137
if(new_plugin->environ == NULL){
162
139
free(new_plugin->argv);
163
140
free(new_plugin);
167
143
new_plugin->environ[0] = NULL;
415
373
.doc = "Group ID the plugins will run as", .group = 3 },
416
374
{ .name = "debug", .key = 132,
417
375
.doc = "Debug mode", .group = 4 },
418
{ .name = "plugin-helper-dir", .key = 133,
420
.doc = "Specify a different plugin helper directory",
423
* These reproduce what we would get without ARGP_NO_HELP
425
{ .name = "help", .key = '?',
426
.doc = "Give this help list", .group = -1 },
427
{ .name = "usage", .key = -3,
428
.doc = "Give a short usage message", .group = -1 },
429
{ .name = "version", .key = 'V',
430
.doc = "Print program version", .group = -1 },
434
__attribute__((nonnull(3)))
435
error_t parse_opt(int key, char *arg, struct argp_state *state){
379
error_t parse_opt (int key, char *arg, __attribute__((unused))
380
struct argp_state *state) {
440
382
case 'g': /* --global-options */
443
while((plugin_option = strsep(&arg, ",")) != NULL){
444
if(not add_argument(getplugin(NULL), plugin_option)){
385
while((p = strsep(&arg, ",")) != NULL){
389
if(not add_argument(getplugin(NULL), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
451
396
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
400
if(not add_environment(getplugin(NULL), arg, true)){
401
perror("add_environment");
456
404
case 'o': /* --options-for */
458
char *option_list = strchr(arg, ':');
459
if(option_list == NULL){
460
argp_error(state, "No colon in \"%s\"", arg);
467
argp_error(state, "Empty plugin name");
472
while((option = strsep(&option_list, ",")) != NULL){
473
if(not add_argument(getplugin(arg), option)){
406
char *p_name = strsep(&arg, ":");
407
if(p_name[0] == '\0' or arg == NULL){
410
char *opt = strsep(&arg, ":");
411
if(opt[0] == '\0' or opt == NULL){
415
while((p = strsep(&opt, ",")) != NULL){
419
if(not add_argument(getplugin(p_name), p)){
420
perror("add_argument");
421
return ARGP_ERR_UNKNOWN;
480
426
case 'E': /* --env-for */
482
431
char *envdef = strchr(arg, ':');
483
432
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
491
argp_error(state, "Empty plugin name");
495
if(add_environment(getplugin(arg), envdef, true)){
436
if(not add_environment(getplugin(arg), envdef+1, true)){
437
perror("add_environment");
500
441
case 'd': /* --disable */
502
443
plugin *p = getplugin(arg);
445
return ARGP_ERR_UNKNOWN;
509
450
case 'e': /* --enable */
511
452
plugin *p = getplugin(arg);
454
return ARGP_ERR_UNKNOWN;
518
459
case 128: /* --plugin-dir */
520
461
plugindir = strdup(arg);
521
if(plugindir != NULL){
462
if(plugindir == NULL){
525
466
case 129: /* --config-file */
526
467
/* This is already done by parse_opt_config_file() */
528
469
case 130: /* --userid */
529
tmp_id = strtoimax(arg, &tmp, 10);
530
if(errno != 0 or tmp == arg or *tmp != '\0'
531
or tmp_id != (uid_t)tmp_id){
532
argp_error(state, "Bad user ID number: \"%s\", using %"
533
PRIdMAX, arg, (intmax_t)uid);
470
uid = (uid_t)strtol(arg, NULL, 10);
539
472
case 131: /* --groupid */
540
tmp_id = strtoimax(arg, &tmp, 10);
541
if(errno != 0 or tmp == arg or *tmp != '\0'
542
or tmp_id != (gid_t)tmp_id){
543
argp_error(state, "Bad group ID number: \"%s\", using %"
544
PRIdMAX, arg, (intmax_t)gid);
473
gid = (gid_t)strtol(arg, NULL, 10);
550
475
case 132: /* --debug */
553
case 133: /* --plugin-helper-dir */
554
free(pluginhelperdir);
555
pluginhelperdir = strdup(arg);
556
if(pluginhelperdir != NULL){
561
* These reproduce what we would get without ARGP_NO_HELP
563
case '?': /* --help */
564
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
565
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
566
case -3: /* --usage */
567
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
568
argp_state_help(state, state->out_stream,
569
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
570
case 'V': /* --version */
571
fprintf(state->out_stream, "%s\n", argp_program_version);
575
* When adding more options before this line, remember to also add a
576
* "case" to the "parse_opt_config_file" function below.
578
478
case ARGP_KEY_ARG:
579
/* Cryptsetup always passes an argument, which is an empty
580
string if "none" was specified in /etc/crypttab. So if
581
argument was empty, we ignore it silently. */
479
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
586
484
return ARGP_ERR_UNKNOWN;
588
return errno; /* Set to 0 at start */
591
489
/* This option parser is the same as parse_opt() above, except it
592
490
ignores everything but the --config-file option. */
593
error_t parse_opt_config_file(int key, char *arg,
594
__attribute__((unused))
595
struct argp_state *state){
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
598
495
case 'g': /* --global-options */
599
496
case 'G': /* --global-env */
600
497
case 'o': /* --options-for */
692
577
new_arg = strdup(p);
693
578
if(new_arg == NULL){
694
error(0, errno, "strdup");
695
exitstatus = EX_OSERR;
580
exitstatus = EXIT_FAILURE;
700
585
custom_argc += 1;
702
char **new_argv = realloc(custom_argv, sizeof(char *)
703
* ((size_t)custom_argc + 1));
704
if(new_argv == NULL){
705
error(0, errno, "realloc");
706
exitstatus = EX_OSERR;
711
custom_argv = new_argv;
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
590
exitstatus = EXIT_FAILURE;
714
594
custom_argv[custom_argc-1] = new_arg;
715
custom_argv[custom_argc] = NULL;
595
custom_argv[custom_argc] = NULL;
719
ret = fclose(conffp);
720
} while(ret == EOF and errno == EINTR);
722
error(0, errno, "fclose");
723
exitstatus = EX_IOERR;
728
600
/* Check for harmful errors and go to fallback. Other errors might
729
601
not affect opening plugins */
730
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
731
error(0, errno, "fopen");
732
exitstatus = EX_OSERR;
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
exitstatus = EXIT_FAILURE;
736
/* If there were any arguments from the configuration file, pass
737
them to parser as command line arguments */
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
738
610
if(custom_argv != NULL){
739
ret = argp_parse(&argp, custom_argc, custom_argv,
740
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
748
error(0, errno, "argp_parse");
749
exitstatus = EX_OSERR;
752
exitstatus = EX_CONFIG;
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
613
if (ret == ARGP_ERR_UNKNOWN){
614
fprintf(stderr, "Unknown error while parsing arguments\n");
615
exitstatus = EXIT_FAILURE;
757
620
/* Parse actual command line arguments, to let them override the
759
ret = argp_parse(&argp, argc, argv,
760
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
768
error(0, errno, "argp_parse");
769
exitstatus = EX_OSERR;
772
exitstatus = EX_USAGE;
777
char *pluginhelperenv;
779
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
780
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
782
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
784
if(ret == -1 or not bret){
785
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
786
" environment variable to \"%s\" for all plugins\n",
787
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
790
free(pluginhelperenv);
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
795
for(plugin *p = plugin_list; p != NULL; p = p->next){
630
for(plugin *p = plugin_list; p != NULL; p=p->next){
796
631
fprintf(stderr, "Plugin: %s has %d arguments\n",
797
632
p->name ? p->name : "Global", p->argc - 1);
798
633
for(char **a = p->argv; *a != NULL; a++){
799
634
fprintf(stderr, "\tArg: %s\n", *a);
801
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
802
637
for(char **a = p->environ; *a != NULL; a++){
803
638
fprintf(stderr, "\t%s\n", *a);
809
/* Work around Debian bug #633582:
810
<https://bugs.debian.org/633582> */
811
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
812
if(plugindir_fd == -1){
814
error(0, errno, "open(\"" PDIR "\")");
817
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
819
error(0, errno, "fstat");
821
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
822
ret = fchown(plugindir_fd, uid, gid);
824
error(0, errno, "fchown");
832
/* Lower permissions */
835
error(0, errno, "setgid");
643
/* Strip permissions down to nobody */
837
644
ret = setuid(uid);
839
error(0, errno, "setuid");
842
/* Open plugin directory with close_on_exec flag */
653
if (plugindir == NULL){
656
dir = opendir(plugindir);
660
perror("Could not open plugin dir");
661
exitstatus = EXIT_FAILURE;
665
/* Set the FD_CLOEXEC flag on the directory, if possible */
844
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
847
#else /* not O_CLOEXEC */
849
#endif /* not O_CLOEXEC */
852
error(0, errno, "Could not open plugin dir");
853
exitstatus = EX_UNAVAILABLE;
858
/* Set the FD_CLOEXEC flag on the directory */
859
ret = set_cloexec_flag(dir_fd);
861
error(0, errno, "set_cloexec_flag");
862
exitstatus = EX_OSERR;
865
#endif /* O_CLOEXEC */
868
int good_name(const struct dirent * const dirent){
869
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
870
"*.dpkg-old", "*.dpkg-bak",
871
"*.dpkg-divert", NULL };
873
#pragma GCC diagnostic push
874
#pragma GCC diagnostic ignored "-Wcast-qual"
876
for(const char **pat = (const char **)patterns;
877
*pat != NULL; pat++){
879
#pragma GCC diagnostic pop
881
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
884
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
885
" matching pattern %s\n", dirent->d_name, *pat);
667
int dir_fd = dirfd(dir);
669
ret = set_cloexec_flag(dir_fd);
671
perror("set_cloexec_flag");
672
exitstatus = EXIT_FAILURE;
893
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
895
if(numplugins == -1){
896
error(0, errno, "Could not scan plugin dir");
898
exitstatus = EX_OSERR;
902
678
FD_ZERO(&rfds_all);
904
680
/* Read and execute any executable in the plugin directory*/
905
for(int i = 0; i < numplugins; i++){
907
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
909
error(0, errno, "Could not open plugin");
913
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
915
error(0, errno, "stat");
682
dirst = readdir(dir);
684
/* All directory entries have been processed */
688
exitstatus = EXIT_FAILURE;
694
d_name_len = strlen(dirst->d_name);
696
/* Ignore dotfiles, backup files and other junk */
698
bool bad_name = false;
700
const char const *bad_prefixes[] = { ".", "#", NULL };
702
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
704
".dpkg-divert", NULL };
705
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
706
size_t pre_len = strlen(*pre);
707
if((d_name_len >= pre_len)
708
and strncmp((dirst->d_name), *pre, pre_len) == 0){
710
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
711
" with bad prefix %s\n", dirst->d_name, *pre);
720
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
721
size_t suf_len = strlen(*suf);
722
if((d_name_len >= suf_len)
723
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
726
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
727
" with bad suffix %s\n", dirst->d_name, *suf);
740
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
746
ret = stat(filename, &st);
921
753
/* Ignore non-executable files */
922
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
754
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
926
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
927
" with bad type or mode\n",
928
plugindir != NULL ? plugindir : PDIR,
929
direntries[i]->d_name);
756
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
757
" with bad type or mode\n", filename);
936
plugin *p = getplugin(direntries[i]->d_name);
763
plugin *p = getplugin(dirst->d_name);
938
error(0, errno, "getplugin");
945
771
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
956
781
for(char **a = g->argv + 1; *a != NULL; a++){
957
782
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
783
perror("add_argument");
961
786
/* Add global environment variables */
962
787
for(char **e = g->environ; *e != NULL; e++){
963
788
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
789
perror("add_environment");
969
/* If this plugin has any environment variables, we need to
970
duplicate the environment from this process, too. */
794
/* If this plugin has any environment variables, we will call
795
using execve and need to duplicate the environment from this
971
797
if(p->environ[0] != NULL){
972
798
for(char **e = environ; *e != NULL; e++){
973
799
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
800
perror("add_environment");
981
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
982
#else /* O_CLOEXEC */
983
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
984
#endif /* O_CLOEXEC */
986
error(0, errno, "pipe");
987
exitstatus = EX_OSERR;
991
if(pipefd[0] >= FD_SETSIZE){
992
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
996
exitstatus = EX_OSERR;
809
exitstatus = EXIT_FAILURE;
1001
812
/* Ask OS to automatic close the pipe on exec */
1002
813
ret = set_cloexec_flag(pipefd[0]);
1004
error(0, errno, "set_cloexec_flag");
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
815
perror("set_cloexec_flag");
816
exitstatus = EXIT_FAILURE;
1011
819
ret = set_cloexec_flag(pipefd[1]);
1013
error(0, errno, "set_cloexec_flag");
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
821
perror("set_cloexec_flag");
822
exitstatus = EXIT_FAILURE;
1020
#endif /* not O_CLOEXEC */
1021
825
/* Block SIGCHLD until process is safely in process list */
1022
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
&sigchld_action.sa_mask,
826
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
828
perror("sigprocmask");
829
exitstatus = EXIT_FAILURE;
1031
832
/* Starting a new process to be watched */
1035
} while(pid == -1 and errno == EINTR);
1037
error(0, errno, "fork");
1038
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1039
&sigchld_action.sa_mask, NULL));
1042
exitstatus = EX_OSERR;
1043
free(direntries[i]);
836
exitstatus = EXIT_FAILURE;
1047
840
/* this is the child process */
1048
841
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1050
error(0, errno, "sigaction");
1053
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
846
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
error(0, errno, "sigprocmask");
848
perror("sigprocmask");
1059
852
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1061
error(0, errno, "dup2");
1065
if(fexecve(plugin_fd, p->argv,
1066
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1067
error(0, errno, "fexecve for %s/%s",
1068
plugindir != NULL ? plugindir : PDIR,
1069
direntries[i]->d_name);
859
/* If dir has no file descriptor, we could not set FD_CLOEXEC
860
above and must now close it manually here. */
863
if(p->environ[0] == NULL){
864
if(execv(filename, p->argv) < 0){
869
if(execve(filename, p->argv, p->environ) < 0){
1074
876
/* Parent process */
1075
877
close(pipefd[1]); /* Close unused write end of pipe */
1077
plugin *new_plugin = getplugin(direntries[i]->d_name);
1078
if(new_plugin == NULL){
1079
error(0, errno, "getplugin");
1080
ret = (int)(TEMP_FAILURE_RETRY
1081
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
879
plugin *new_plugin = getplugin(dirst->d_name);
880
if (new_plugin == NULL){
882
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1084
error(0, errno, "sigprocmask");
884
perror("sigprocmask");
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
886
exitstatus = EXIT_FAILURE;
1090
free(direntries[i]);
1092
890
new_plugin->pid = pid;
1093
891
new_plugin->fd = pipefd[0];
1095
893
/* Unblock SIGCHLD so signal handler can be run if this process
1096
894
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
895
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
897
perror("sigprocmask");
898
exitstatus = EXIT_FAILURE;
1106
902
FD_SET(new_plugin->fd, &rfds_all);
1108
if(maxfd < new_plugin->fd){
904
if (maxfd < new_plugin->fd){
1109
905
maxfd = new_plugin->fd;
1117
free_plugin(getplugin(NULL));
1119
913
for(plugin *p = plugin_list; p != NULL; p = p->next){
1120
914
if(p->pid != 0){
1126
920
free_plugin_list();
1130
924
/* Main loop while running plugins exist */
1131
925
while(plugin_list){
1132
926
fd_set rfds = rfds_all;
1133
927
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1134
if(select_ret == -1 and errno != EINTR){
1135
error(0, errno, "select");
1136
exitstatus = EX_OSERR;
928
if (select_ret == -1){
930
exitstatus = EXIT_FAILURE;
1139
933
/* OK, now either a process completed, or something can be read
1140
934
from one of them */
1141
935
for(plugin *proc = plugin_list; proc != NULL;){
1142
936
/* Is this process completely done? */
1143
if(proc->completed and proc->eof){
937
if(proc->eof and proc->completed){
1144
938
/* Only accept the plugin output if it exited cleanly */
1145
939
if(not WIFEXITED(proc->status)
1146
940
or WEXITSTATUS(proc->status) != 0){
1147
941
/* Bad exit by plugin */
1150
944
if(WIFEXITED(proc->status)){
1151
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1152
" status %d\n", proc->name,
1153
(intmax_t) (proc->pid),
945
fprintf(stderr, "Plugin %u exited with status %d\n",
946
(unsigned int) (proc->pid),
1154
947
WEXITSTATUS(proc->status));
1155
} else if(WIFSIGNALED(proc->status)){
1156
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1157
" signal %d: %s\n", proc->name,
1158
(intmax_t) (proc->pid),
1159
WTERMSIG(proc->status),
1160
strsignal(WTERMSIG(proc->status)));
948
} else if(WIFSIGNALED(proc->status)) {
949
fprintf(stderr, "Plugin %u killed by signal %d\n",
950
(unsigned int) (proc->pid),
951
WTERMSIG(proc->status));
952
} else if(WCOREDUMP(proc->status)){
953
fprintf(stderr, "Plugin %d dumped core\n",
954
(unsigned int) (proc->pid));
1164
958
/* Remove the plugin */
1165
959
FD_CLR(proc->fd, &rfds_all);
1167
961
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1170
&sigchld_action.sa_mask,
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
962
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
964
perror("sigprocmask");
965
exitstatus = EXIT_FAILURE;
969
/* We are done modifying process list, so unblock signal */
970
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
973
perror("sigprocmask");
974
exitstatus = EXIT_FAILURE;
978
if(plugin_list == NULL){
1178
982
plugin *next_plugin = proc->next;
1179
983
free_plugin(proc);
1180
984
proc = next_plugin;
1182
/* We are done modifying process list, so unblock signal */
1183
ret = (int)(TEMP_FAILURE_RETRY
1184
(sigprocmask(SIG_UNBLOCK,
1185
&sigchld_action.sa_mask, NULL)));
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1192
if(plugin_list == NULL){
1199
988
/* This process exited nicely, so print its buffer */
1201
990
bool bret = print_out_password(proc->buffer,
1202
991
proc->buffer_length);
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
993
perror("print_out_password");
994
exitstatus = EXIT_FAILURE;
1216
1005
/* Before reading, make the process' data buffer large enough */
1217
1006
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1218
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1219
+ (size_t) BUFFER_SIZE);
1220
if(new_buffer == NULL){
1221
error(0, errno, "malloc");
1222
exitstatus = EX_OSERR;
1007
proc->buffer = realloc(proc->buffer, proc->buffer_size
1008
+ (size_t) BUFFER_SIZE);
1009
if (proc->buffer == NULL){
1011
exitstatus = EXIT_FAILURE;
1225
proc->buffer = new_buffer;
1226
1014
proc->buffer_size += BUFFER_SIZE;
1228
1016
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1231
+ proc->buffer_length,
1017
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1234
1020
/* Read error from this process; ignore the error */
1235
1021
proc = proc->next;
1240
1026
proc->eof = true;
1242
proc->buffer_length += (size_t) sret;
1028
proc->buffer_length += (size_t) ret;
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
1036
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1252
1037
/* Fallback if all plugins failed, none are found or an error
1255
1040
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1256
1041
char *passwordbuffer = getpass("Password: ");
1257
size_t len = strlen(passwordbuffer);
1258
/* Strip trailing newline */
1259
if(len > 0 and passwordbuffer[len-1] == '\n'){
1260
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1263
bret = print_out_password(passwordbuffer, len);
1042
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
1044
perror("print_out_password");
1045
exitstatus = EXIT_FAILURE;
1270
1049
/* Restore old signal handler */
1271
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
1052
perror("sigaction");
1053
exitstatus = EXIT_FAILURE;
1277
1056
if(custom_argv != NULL){
1278
1057
for(char **arg = custom_argv+1; *arg != NULL; arg++){