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,
386
323
{ .name = "global-options", .key = 'g',
387
324
.arg = "OPTION[,OPTION[,...]]",
388
325
.doc = "Options passed to all plugins" },
389
{ .name = "global-env", .key = 'G',
326
{ .name = "global-envs", .key = 'e',
390
327
.arg = "VAR=value",
391
328
.doc = "Environment variable passed to all plugins" },
392
329
{ .name = "options-for", .key = 'o',
393
330
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
394
331
.doc = "Options passed only to specified plugin" },
395
{ .name = "env-for", .key = 'E',
332
{ .name = "envs-for", .key = 'f',
396
333
.arg = "PLUGIN:ENV=value",
397
334
.doc = "Environment variable passed to specified plugin" },
398
335
{ .name = "disable", .key = 'd',
400
337
.doc = "Disable a specific plugin", .group = 1 },
401
{ .name = "enable", .key = 'e',
403
.doc = "Enable a specific plugin", .group = 1 },
404
338
{ .name = "plugin-dir", .key = 128,
405
339
.arg = "DIRECTORY",
406
340
.doc = "Specify a different plugin directory", .group = 2 },
407
{ .name = "config-file", .key = 129,
409
.doc = "Specify a different configuration file", .group = 2 },
410
{ .name = "userid", .key = 130,
411
.arg = "ID", .flags = 0,
412
.doc = "User ID the plugins will run as", .group = 3 },
413
{ .name = "groupid", .key = 131,
414
.arg = "ID", .flags = 0,
415
.doc = "Group ID the plugins will run as", .group = 3 },
416
{ .name = "debug", .key = 132,
417
.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 },
341
{ .name = "userid", .key = 129,
342
.arg = "ID", .flags = 0,
343
.doc = "User ID the plugins will run as", .group = 2 },
344
{ .name = "groupid", .key = 130,
345
.arg = "ID", .flags = 0,
346
.doc = "Group ID the plugins will run as", .group = 2 },
347
{ .name = "debug", .key = 131,
348
.doc = "Debug mode", .group = 3 },
434
__attribute__((nonnull(3)))
435
error_t parse_opt(int key, char *arg, struct argp_state *state){
440
case 'g': /* --global-options */
443
while((plugin_option = strsep(&arg, ",")) != NULL){
444
if(not add_argument(getplugin(NULL), plugin_option)){
451
case 'G': /* --global-env */
452
if(add_environment(getplugin(NULL), arg, true)){
456
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)){
480
case 'E': /* --env-for */
352
error_t parse_opt (int key, char *arg, struct argp_state *state) {
353
/* Get the INPUT argument from `argp_parse', which we know is a
354
pointer to our plugin list pointer. */
355
plugin **plugins = state->input;
360
while((p = strsep(&arg, ",")) != NULL){
364
if(not add_argument(getplugin(NULL, plugins), p)){
365
perror("add_argument");
366
return ARGP_ERR_UNKNOWN;
376
char *envdef = strdup(arg);
380
if(not add_environment(getplugin(NULL, plugins), envdef)){
381
perror("add_environment");
387
char *p_name = strsep(&arg, ":");
388
if(p_name[0] == '\0'){
391
char *opt = strsep(&arg, ":");
397
while((p = strsep(&opt, ",")) != NULL){
401
if(not add_argument(getplugin(p_name, plugins), p)){
402
perror("add_argument");
403
return ARGP_ERR_UNKNOWN;
482
414
char *envdef = strchr(arg, ':');
483
415
if(envdef == NULL){
484
argp_error(state, "No colon in \"%s\"", arg);
418
char *p_name = strndup(arg, (size_t) (envdef-arg));
491
argp_error(state, "Empty plugin name");
495
if(add_environment(getplugin(arg), envdef, true)){
500
case 'd': /* --disable */
502
plugin *p = getplugin(arg);
509
case 'e': /* --enable */
511
plugin *p = getplugin(arg);
518
case 128: /* --plugin-dir */
520
plugindir = strdup(arg);
521
if(plugindir != NULL){
525
case 129: /* --config-file */
526
/* This is already done by parse_opt_config_file() */
528
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);
539
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);
550
case 132: /* --debug */
423
if(not add_environment(getplugin(p_name, plugins), envdef)){
424
perror("add_environment");
430
plugin *p = getplugin(arg, plugins);
432
return ARGP_ERR_UNKNOWN;
441
uid = (uid_t)strtol(arg, NULL, 10);
444
gid = (gid_t)strtol(arg, NULL, 10);
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.
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. */
586
return ARGP_ERR_UNKNOWN;
588
return errno; /* Set to 0 at start */
591
/* This option parser is the same as parse_opt() above, except it
592
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){
598
case 'g': /* --global-options */
599
case 'G': /* --global-env */
600
case 'o': /* --options-for */
601
case 'E': /* --env-for */
602
case 'd': /* --disable */
603
case 'e': /* --enable */
604
case 128: /* --plugin-dir */
606
case 129: /* --config-file */
608
argfile = strdup(arg);
613
case 130: /* --userid */
614
case 131: /* --groupid */
615
case 132: /* --debug */
616
case 133: /* --plugin-helper-dir */
617
case '?': /* --help */
618
case -3: /* --usage */
619
case 'V': /* --version */
623
return ARGP_ERR_UNKNOWN;
628
struct argp argp = { .options = options,
629
.parser = parse_opt_config_file,
450
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
455
return ARGP_ERR_UNKNOWN;
460
plugin *plugin_list = NULL;
462
struct argp argp = { .options = options, .parser = parse_opt,
463
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
631
464
.doc = "Mandos plugin runner -- Run plugins" };
633
/* Parse using parse_opt_config_file() in order to get the custom
634
config file location, if any. */
635
ret = argp_parse(&argp, argc, argv,
636
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
644
error(0, errno, "argp_parse");
645
exitstatus = EX_OSERR;
648
exitstatus = EX_USAGE;
652
/* Reset to the normal argument parser */
653
argp.parser = parse_opt;
655
/* Open the configfile if available */
657
conffp = fopen(AFILE, "r");
659
conffp = fopen(argfile, "r");
466
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
467
if (ret == ARGP_ERR_UNKNOWN){
468
fprintf(stderr, "Unknown error while parsing arguments\n");
469
exitstatus = EXIT_FAILURE;
473
conffp = fopen(argfile, "r");
661
474
if(conffp != NULL){
662
475
char *org_line = NULL;
663
476
char *p, *arg, *new_arg, *line;
665
479
const char whitespace_delims[] = " \r\t\f\v\n";
666
480
const char comment_delim[] = "#";
669
custom_argv = malloc(sizeof(char*) * 2);
670
if(custom_argv == NULL){
671
error(0, errno, "malloc");
672
exitstatus = EX_OSERR;
675
custom_argv[0] = argv[0];
676
custom_argv[1] = NULL;
678
/* for each line in the config file, strip whitespace and ignore
681
483
sret = getline(&org_line, &size, conffp);
687
489
arg = strsep(&line, comment_delim);
688
490
while((p = strsep(&arg, whitespace_delims)) != NULL){
798
528
for(char **a = p->argv; *a != NULL; a++){
799
529
fprintf(stderr, "\tArg: %s\n", *a);
801
fprintf(stderr, "...and %d environment variables\n", p->envc);
531
fprintf(stderr, "...and %u environment variables\n", p->envc);
802
532
for(char **a = p->environ; *a != NULL; a++){
803
533
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");
837
538
ret = setuid(uid);
839
error(0, errno, "setuid");
842
/* Open plugin directory with close_on_exec flag */
548
dir = opendir(plugindir);
550
perror("Could not open plugin dir");
551
exitstatus = EXIT_FAILURE;
555
/* 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);
557
int dir_fd = dirfd(dir);
559
ret = set_cloexec_flag(dir_fd);
561
perror("set_cloexec_flag");
562
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
568
FD_ZERO(&rfds_all);
904
/* 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");
921
/* Ignore non-executable files */
922
if(not S_ISREG(st.st_mode)
923
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
571
dirst = readdir(dir);
573
// All directory entries have been processed
577
exitstatus = EXIT_FAILURE;
583
d_name_len = strlen(dirst->d_name);
585
// Ignore dotfiles, backup files and other junk
587
bool bad_name = false;
589
const char const *bad_prefixes[] = { ".", "#", NULL };
591
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
593
".dpkg-divert", NULL };
594
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
595
size_t pre_len = strlen(*pre);
596
if((d_name_len >= pre_len)
597
and strncmp((dirst->d_name), *pre, pre_len) == 0){
599
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
600
" with bad prefix %s\n", dirst->d_name, *pre);
611
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
612
size_t suf_len = strlen(*suf);
613
if((d_name_len >= suf_len)
614
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
617
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
618
" with bad suffix %s\n", dirst->d_name, *suf);
631
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
637
ret = stat(filename, &st);
644
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);
646
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
647
" with bad type or mode\n", filename);
936
plugin *p = getplugin(direntries[i]->d_name);
652
plugin *p = getplugin(dirst->d_name, &plugin_list);
938
error(0, errno, "getplugin");
945
660
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
946
direntries[i]->d_name);
953
667
/* Add global arguments to argument list for this plugin */
954
plugin *g = getplugin(NULL);
668
plugin *g = getplugin(NULL, &plugin_list);
956
670
for(char **a = g->argv + 1; *a != NULL; a++){
957
671
if(not add_argument(p, *a)){
958
error(0, errno, "add_argument");
672
perror("add_argument");
961
675
/* Add global environment variables */
962
676
for(char **e = g->environ; *e != NULL; e++){
963
if(not add_environment(p, *e, false)){
964
error(0, errno, "add_environment");
677
if(not add_environment(p, *e)){
678
perror("add_environment");
969
/* If this plugin has any environment variables, we need to
970
duplicate the environment from this process, too. */
683
/* If this plugin has any environment variables, we will call
684
using execve and need to duplicate the environment from this
971
686
if(p->environ[0] != NULL){
972
687
for(char **e = environ; *e != NULL; e++){
973
if(not add_environment(p, *e, false)){
974
error(0, errno, "add_environment");
688
char *copy = strdup(*e);
693
if(not add_environment(p, copy)){
694
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;
1001
/* Ask OS to automatic close the pipe on exec */
703
exitstatus = EXIT_FAILURE;
1002
706
ret = set_cloexec_flag(pipefd[0]);
1004
error(0, errno, "set_cloexec_flag");
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
708
perror("set_cloexec_flag");
709
exitstatus = EXIT_FAILURE;
1011
712
ret = set_cloexec_flag(pipefd[1]);
1013
error(0, errno, "set_cloexec_flag");
1016
exitstatus = EX_OSERR;
1017
free(direntries[i]);
714
perror("set_cloexec_flag");
715
exitstatus = EXIT_FAILURE;
1020
#endif /* not O_CLOEXEC */
1021
718
/* Block SIGCHLD until process is safely in process list */
1022
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1023
&sigchld_action.sa_mask,
719
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1026
error(0, errno, "sigprocmask");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
721
perror("sigprocmask");
722
exitstatus = EXIT_FAILURE;
1031
/* Starting a new process to be watched */
1035
} while(pid == -1 and errno == EINTR);
725
// Starting a new process to be watched
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]);
729
exitstatus = EXIT_FAILURE;
1047
733
/* this is the child process */
1048
734
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1050
error(0, errno, "sigaction");
1053
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
739
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
error(0, errno, "sigprocmask");
741
perror("sigprocmask");
1059
745
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);
752
/* If dir has no file descriptor, we could not set FD_CLOEXEC
753
above and must now close it manually here. */
756
if(p->environ[0] == NULL){
757
if(execv(filename, p->argv) < 0){
762
if(execve(filename, p->argv, p->environ) < 0){
1074
/* Parent process */
1075
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,
771
close(pipefd[1]); /* close unused write end of pipe */
772
process *new_process = malloc(sizeof(process));
773
if (new_process == NULL){
775
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1084
error(0, errno, "sigprocmask");
777
perror("sigprocmask");
1086
exitstatus = EX_OSERR;
1087
free(direntries[i]);
779
exitstatus = EXIT_FAILURE;
1090
free(direntries[i]);
1092
new_plugin->pid = pid;
1093
new_plugin->fd = pipefd[0];
783
*new_process = (struct process){ .pid = pid,
785
.next = process_list };
787
process_list = new_process;
1095
788
/* Unblock SIGCHLD so signal handler can be run if this process
1096
789
has already completed */
1097
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1098
&sigchld_action.sa_mask,
790
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1101
error(0, errno, "sigprocmask");
1102
exitstatus = EX_OSERR;
792
perror("sigprocmask");
793
exitstatus = EXIT_FAILURE;
1106
FD_SET(new_plugin->fd, &rfds_all);
1108
if(maxfd < new_plugin->fd){
1109
maxfd = new_plugin->fd;
1117
free_plugin(getplugin(NULL));
1119
for(plugin *p = plugin_list; p != NULL; p = p->next){
1123
if(p->next == NULL){
1124
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1130
/* Main loop while running plugins exist */
797
FD_SET(new_process->fd, &rfds_all);
799
if (maxfd < new_process->fd){
800
maxfd = new_process->fd;
805
free_plugin_list(plugin_list);
811
if (process_list == NULL){
812
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1132
817
fd_set rfds = rfds_all;
1133
818
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;
819
if (select_ret == -1){
821
exitstatus = EXIT_FAILURE;
1139
824
/* OK, now either a process completed, or something can be read
1140
825
from one of them */
1141
for(plugin *proc = plugin_list; proc != NULL;){
826
for(process *proc = process_list; proc ; proc = proc->next){
1142
827
/* Is this process completely done? */
1143
if(proc->completed and proc->eof){
828
if(proc->eof and proc->completed){
1144
829
/* Only accept the plugin output if it exited cleanly */
1145
830
if(not WIFEXITED(proc->status)
1146
831
or WEXITSTATUS(proc->status) != 0){
1147
832
/* Bad exit by plugin */
1150
834
if(WIFEXITED(proc->status)){
1151
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1152
" status %d\n", proc->name,
1153
(intmax_t) (proc->pid),
835
fprintf(stderr, "Plugin %u exited with status %d\n",
836
(unsigned int) (proc->pid),
1154
837
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)));
838
} else if(WIFSIGNALED(proc->status)) {
839
fprintf(stderr, "Plugin %u killed by signal %d\n",
840
(unsigned int) (proc->pid),
841
WTERMSIG(proc->status));
842
} else if(WCOREDUMP(proc->status)){
843
fprintf(stderr, "Plugin %d dumped core\n",
844
(unsigned int) (proc->pid));
1164
847
/* Remove the plugin */
1165
848
FD_CLR(proc->fd, &rfds_all);
1167
849
/* Block signal while modifying process_list */
1168
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1170
&sigchld_action.sa_mask,
850
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1173
error(0, errno, "sigprocmask");
1174
exitstatus = EX_OSERR;
852
perror("sigprocmask");
853
exitstatus = EXIT_FAILURE;
1178
plugin *next_plugin = proc->next;
856
/* Delete this process entry from the list */
857
if(process_list == proc){
858
/* First one - simple */
859
process_list = proc->next;
861
/* Second one or later */
862
for(process *p = process_list; p != NULL; p = p->next){
864
p->next = proc->next;
1182
869
/* 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)));
870
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1187
error(0, errno, "sigprocmask");
1188
exitstatus = EX_OSERR;
1192
if(plugin_list == NULL){
873
perror("sigprocmask");
877
/* We deleted this process from the list, so we can't go
878
proc->next. Therefore, start over from the beginning of
1199
882
/* This process exited nicely, so print its buffer */
1201
884
bool bret = print_out_password(proc->buffer,
1202
885
proc->buffer_length);
1204
error(0, errno, "print_out_password");
1205
exitstatus = EX_IOERR;
887
perror("print_out_password");
888
exitstatus = EXIT_FAILURE;
1210
892
/* This process has not completed. Does it have any output? */
1211
893
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1212
894
/* This process had nothing to say at this time */
1216
897
/* Before reading, make the process' data buffer large enough */
1217
898
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;
899
proc->buffer = realloc(proc->buffer, proc->buffer_size
900
+ (size_t) BUFFER_SIZE);
901
if (proc->buffer == NULL){
903
exitstatus = EXIT_FAILURE;
1225
proc->buffer = new_buffer;
1226
906
proc->buffer_size += BUFFER_SIZE;
1228
908
/* Read from the process */
1229
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1231
+ proc->buffer_length,
909
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1234
912
/* Read error from this process; ignore the error */
1240
917
proc->eof = true;
1242
proc->buffer_length += (size_t) sret;
919
proc->buffer_length += (size_t) ret;
1250
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1251
and exitstatus != EX_OK)){
927
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1252
928
/* Fallback if all plugins failed, none are found or an error
1255
931
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1256
932
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);
933
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1265
error(0, errno, "print_out_password");
1266
exitstatus = EX_IOERR;
935
perror("print_out_password");
936
exitstatus = EXIT_FAILURE;
1270
940
/* Restore old signal handler */
1271
941
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1273
error(0, errno, "sigaction");
1274
exitstatus = EX_OSERR;
944
exitstatus = EXIT_FAILURE;
1277
947
if(custom_argv != NULL){
1278
for(char **arg = custom_argv+1; *arg != NULL; arg++){
948
for(char **arg = custom_argv; *arg != NULL; arg++){
1281
951
free(custom_argv);
953
free_plugin_list(plugin_list);
1290
/* Kill the processes */
1291
for(plugin *p = plugin_list; p != NULL; p = p->next){
1294
ret = kill(p->pid, SIGTERM);
1295
if(ret == -1 and errno != ESRCH){
1296
/* Set-uid proccesses might not get closed */
1297
error(0, errno, "kill");
959
/* Free the process list and kill the processes */
960
for(process *next; process_list != NULL; process_list = next){
961
next = process_list->next;
962
close(process_list->fd);
963
ret = kill(process_list->pid, SIGTERM);
964
if(ret == -1 and errno != ESRCH){
965
/* set-uid proccesses migth not get closed */
968
free(process_list->buffer);
1302
972
/* Wait for any remaining child processes to terminate */
1304
974
ret = wait(NULL);
1305
975
} while(ret >= 0);
1306
976
if(errno != ECHILD){
1307
error(0, errno, "wait");
1313
free(pluginhelperdir);
1316
980
return exitstatus;