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(),
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
42
#include <iso646.h> /* and, or, not */
44
#include <dirent.h> /* struct dirent, scandirat() */
45
#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
46
FD_CLOEXEC, write(), STDOUT_FILENO,
47
struct stat, fstat(), close(),
48
setgid(), setuid(), S_ISREG(),
49
faccessat() pipe2(), fork(),
50
_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(),
52
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
57
55
#include <errno.h> /* errno */
58
56
#include <argp.h> /* struct argp_option, struct
59
57
argp_state, struct argp,
385
302
{ .name = "global-options", .key = 'g',
386
303
.arg = "OPTION[,OPTION[,...]]",
387
304
.doc = "Options passed to all plugins" },
388
{ .name = "global-env", .key = 'G',
305
{ .name = "global-envs", .key = 'e',
389
306
.arg = "VAR=value",
390
307
.doc = "Environment variable passed to all plugins" },
391
308
{ .name = "options-for", .key = 'o',
392
309
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
393
310
.doc = "Options passed only to specified plugin" },
394
{ .name = "env-for", .key = 'E',
311
{ .name = "envs-for", .key = 'f',
395
312
.arg = "PLUGIN:ENV=value",
396
313
.doc = "Environment variable passed to specified plugin" },
397
314
{ .name = "disable", .key = 'd',
399
316
.doc = "Disable a specific plugin", .group = 1 },
400
{ .name = "enable", .key = 'e',
402
.doc = "Enable a specific plugin", .group = 1 },
403
317
{ .name = "plugin-dir", .key = 128,
404
318
.arg = "DIRECTORY",
405
319
.doc = "Specify a different plugin directory", .group = 2 },
406
{ .name = "config-file", .key = 129,
408
.doc = "Specify a different configuration file", .group = 2 },
409
{ .name = "userid", .key = 130,
410
.arg = "ID", .flags = 0,
411
.doc = "User ID the plugins will run as", .group = 3 },
412
{ .name = "groupid", .key = 131,
413
.arg = "ID", .flags = 0,
414
.doc = "Group ID the plugins will run as", .group = 3 },
415
{ .name = "debug", .key = 132,
416
.doc = "Debug mode", .group = 4 },
418
* These reproduce what we would get without ARGP_NO_HELP
420
{ .name = "help", .key = '?',
421
.doc = "Give this help list", .group = -1 },
422
{ .name = "usage", .key = -3,
423
.doc = "Give a short usage message", .group = -1 },
424
{ .name = "version", .key = 'V',
425
.doc = "Print program version", .group = -1 },
320
{ .name = "userid", .key = 129,
321
.arg = "ID", .flags = 0,
322
.doc = "User ID the plugins will run as", .group = 2 },
323
{ .name = "groupid", .key = 130,
324
.arg = "ID", .flags = 0,
325
.doc = "Group ID the plugins will run as", .group = 2 },
326
{ .name = "debug", .key = 131,
327
.doc = "Debug mode", .group = 3 },
429
__attribute__((nonnull(3)))
430
error_t parse_opt(int key, char *arg, struct argp_state *state){
435
case 'g': /* --global-options */
438
while((plugin_option = strsep(&arg, ",")) != NULL){
439
if(not add_argument(getplugin(NULL), plugin_option)){
446
case 'G': /* --global-env */
447
if(add_environment(getplugin(NULL), arg, true)){
451
case 'o': /* --options-for */
453
char *option_list = strchr(arg, ':');
454
if(option_list == NULL){
455
argp_error(state, "No colon in \"%s\"", arg);
462
argp_error(state, "Empty plugin name");
467
while((option = strsep(&option_list, ",")) != NULL){
468
if(not add_argument(getplugin(arg), option)){
475
case 'E': /* --env-for */
331
error_t parse_opt (int key, char *arg, struct argp_state *state) {
332
/* Get the INPUT argument from `argp_parse', which we know is a
333
pointer to our plugin list pointer. */
334
plugin **plugins = state->input;
339
while((p = strsep(&arg, ",")) != NULL){
343
if(not add_argument(getplugin(NULL, plugins), p)){
344
perror("add_argument");
345
return ARGP_ERR_UNKNOWN;
355
char *envdef = strdup(arg);
359
if(not add_environment(getplugin(NULL, plugins), envdef)){
360
perror("add_environment");
366
char *p_name = strsep(&arg, ":");
367
if(p_name[0] == '\0'){
370
char *opt = strsep(&arg, ":");
376
while((p = strsep(&opt, ",")) != NULL){
380
if(not add_argument(getplugin(p_name, plugins), p)){
381
perror("add_argument");
382
return ARGP_ERR_UNKNOWN;
477
393
char *envdef = strchr(arg, ':');
478
394
if(envdef == NULL){
479
argp_error(state, "No colon in \"%s\"", arg);
397
char *p_name = strndup(arg, (size_t) (envdef-arg));
486
argp_error(state, "Empty plugin name");
490
if(add_environment(getplugin(arg), envdef, true)){
495
case 'd': /* --disable */
497
plugin *p = getplugin(arg);
504
case 'e': /* --enable */
506
plugin *p = getplugin(arg);
513
case 128: /* --plugin-dir */
515
plugindir = strdup(arg);
516
if(plugindir != NULL){
520
case 129: /* --config-file */
521
/* This is already done by parse_opt_config_file() */
523
case 130: /* --userid */
524
tmp_id = strtoimax(arg, &tmp, 10);
525
if(errno != 0 or tmp == arg or *tmp != '\0'
526
or tmp_id != (uid_t)tmp_id){
527
argp_error(state, "Bad user ID number: \"%s\", using %"
528
PRIdMAX, arg, (intmax_t)uid);
534
case 131: /* --groupid */
535
tmp_id = strtoimax(arg, &tmp, 10);
536
if(errno != 0 or tmp == arg or *tmp != '\0'
537
or tmp_id != (gid_t)tmp_id){
538
argp_error(state, "Bad group ID number: \"%s\", using %"
539
PRIdMAX, arg, (intmax_t)gid);
545
case 132: /* --debug */
402
if(not add_environment(getplugin(p_name, plugins), envdef)){
403
perror("add_environment");
409
plugin *p = getplugin(arg, plugins);
411
return ARGP_ERR_UNKNOWN;
420
uid = (uid_t)strtol(arg, NULL, 10);
423
gid = (gid_t)strtol(arg, NULL, 10);
549
* These reproduce what we would get without ARGP_NO_HELP
551
case '?': /* --help */
552
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
553
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
554
case -3: /* --usage */
555
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
556
argp_state_help(state, state->out_stream,
557
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
558
case 'V': /* --version */
559
fprintf(state->out_stream, "%s\n", argp_program_version);
563
* When adding more options before this line, remember to also add a
564
* "case" to the "parse_opt_config_file" function below.
567
/* Cryptsetup always passes an argument, which is an empty
568
string if "none" was specified in /etc/crypttab. So if
569
argument was empty, we ignore it silently. */
574
return ARGP_ERR_UNKNOWN;
576
return errno; /* Set to 0 at start */
579
/* This option parser is the same as parse_opt() above, except it
580
ignores everything but the --config-file option. */
581
error_t parse_opt_config_file(int key, char *arg,
582
__attribute__((unused))
583
struct argp_state *state){
586
case 'g': /* --global-options */
587
case 'G': /* --global-env */
588
case 'o': /* --options-for */
589
case 'E': /* --env-for */
590
case 'd': /* --disable */
591
case 'e': /* --enable */
592
case 128: /* --plugin-dir */
594
case 129: /* --config-file */
596
argfile = strdup(arg);
601
case 130: /* --userid */
602
case 131: /* --groupid */
603
case 132: /* --debug */
604
case '?': /* --help */
605
case -3: /* --usage */
606
case 'V': /* --version */
610
return ARGP_ERR_UNKNOWN;
615
struct argp argp = { .options = options,
616
.parser = parse_opt_config_file,
429
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
434
return ARGP_ERR_UNKNOWN;
439
plugin *plugin_list = NULL;
441
struct argp argp = { .options = options, .parser = parse_opt,
442
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
618
443
.doc = "Mandos plugin runner -- Run plugins" };
620
/* Parse using parse_opt_config_file() in order to get the custom
621
config file location, if any. */
622
ret = argp_parse(&argp, argc, argv,
623
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
631
error(0, errno, "argp_parse");
632
exitstatus = EX_OSERR;
635
exitstatus = EX_USAGE;
639
/* Reset to the normal argument parser */
640
argp.parser = parse_opt;
642
/* Open the configfile if available */
644
conffp = fopen(AFILE, "r");
646
conffp = fopen(argfile, "r");
445
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
446
if (ret == ARGP_ERR_UNKNOWN){
447
fprintf(stderr, "Unknown error while parsing arguments\n");
448
exitstatus = EXIT_FAILURE;
452
conffp = fopen(argfile, "r");
648
453
if(conffp != NULL){
649
454
char *org_line = NULL;
650
455
char *p, *arg, *new_arg, *line;
652
458
const char whitespace_delims[] = " \r\t\f\v\n";
653
459
const char comment_delim[] = "#";
656
462
custom_argv = malloc(sizeof(char*) * 2);
657
463
if(custom_argv == NULL){
658
error(0, errno, "malloc");
659
exitstatus = EX_OSERR;
465
exitstatus = EXIT_FAILURE;
662
468
custom_argv[0] = argv[0];
663
469
custom_argv[1] = NULL;
665
/* for each line in the config file, strip whitespace and ignore
668
472
sret = getline(&org_line, &size, conffp);
674
478
arg = strsep(&line, comment_delim);
675
479
while((p = strsep(&arg, whitespace_delims)) != NULL){
768
522
for(char **a = p->argv; *a != NULL; a++){
769
523
fprintf(stderr, "\tArg: %s\n", *a);
771
fprintf(stderr, "...and %d environment variables\n", p->envc);
525
fprintf(stderr, "...and %u environment variables\n", p->envc);
772
526
for(char **a = p->environ; *a != NULL; a++){
773
527
fprintf(stderr, "\t%s\n", *a);
779
/* Work around Debian bug #633582:
780
<http://bugs.debian.org/633582> */
781
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
782
if(plugindir_fd == -1){
784
error(0, errno, "open(\"" PDIR "\")");
787
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
789
error(0, errno, "fstat");
791
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
792
ret = fchown(plugindir_fd, uid, gid);
794
error(0, errno, "fchown");
798
TEMP_FAILURE_RETRY(close(plugindir_fd));
802
/* Lower permissions */
805
error(0, errno, "setgid");
807
532
ret = setuid(uid);
809
error(0, errno, "setuid");
812
/* Open plugin directory with close_on_exec flag */
542
dir = opendir(plugindir);
544
perror("Could not open plugin dir");
545
exitstatus = EXIT_FAILURE;
549
/* Set the FD_CLOEXEC flag on the directory, if possible */
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
817
#else /* not O_CLOEXEC */
819
#endif /* not O_CLOEXEC */
822
error(0, errno, "Could not open plugin dir");
823
exitstatus = EX_UNAVAILABLE;
828
/* Set the FD_CLOEXEC flag on the directory */
829
ret = set_cloexec_flag(dir_fd);
831
error(0, errno, "set_cloexec_flag");
832
exitstatus = EX_OSERR;
835
#endif /* O_CLOEXEC */
838
int good_name(const struct dirent * const dirent){
839
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
840
"*.dpkg-old", "*.dpkg-bak",
841
"*.dpkg-divert", NULL };
843
#pragma GCC diagnostic push
844
#pragma GCC diagnostic ignored "-Wcast-qual"
846
for(const char **pat = (const char **)patterns;
847
*pat != NULL; pat++){
849
#pragma GCC diagnostic pop
851
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
854
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
855
" matching pattern %s\n", dirent->d_name, *pat);
551
int dir_fd = dirfd(dir);
553
ret = set_cloexec_flag(dir_fd);
555
perror("set_cloexec_flag");
556
exitstatus = EXIT_FAILURE;
864
#if __GLIBC_PREREQ(2, 15)
865
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
867
#else /* not __GLIBC_PREREQ(2, 15) */
868
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
869
&direntries, good_name, alphasort);
870
#endif /* not __GLIBC_PREREQ(2, 15) */
871
#else /* not __GLIBC__ */
872
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
873
&direntries, good_name, alphasort);
874
#endif /* not __GLIBC__ */
875
if(numplugins == -1){
876
error(0, errno, "Could not scan plugin dir");
878
exitstatus = EX_OSERR;
882
562
FD_ZERO(&rfds_all);
884
/* Read and execute any executable in the plugin directory*/
885
for(int i = 0; i < numplugins; i++){
887
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
889
error(0, errno, "Could not open plugin");
892
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
894
error(0, errno, "stat");
895
TEMP_FAILURE_RETRY(close(plugin_fd));
899
/* Ignore non-executable files */
900
if(not S_ISREG(st.st_mode)
901
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
565
dirst = readdir(dir);
567
// All directory entries have been processed
571
exitstatus = EXIT_FAILURE;
577
d_name_len = strlen(dirst->d_name);
579
// Ignore dotfiles, backup files and other junk
581
bool bad_name = false;
583
const char const *bad_prefixes[] = { ".", "#", NULL };
585
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
587
".dpkg-divert", NULL };
588
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
589
size_t pre_len = strlen(*pre);
590
if((d_name_len >= pre_len)
591
and strncmp((dirst->d_name), *pre, pre_len) == 0){
593
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
594
" with bad prefix %s\n", dirst->d_name, *pre);
605
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
606
size_t suf_len = strlen(*suf);
607
if((d_name_len >= suf_len)
608
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
611
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
612
" with bad suffix %s\n", dirst->d_name, *suf);
625
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
631
ret = stat(filename, &st);
638
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
904
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
905
" with bad type or mode\n",
906
plugindir != NULL ? plugindir : PDIR,
907
direntries[i]->d_name);
640
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
641
" with bad type or mode\n", filename);
909
TEMP_FAILURE_RETRY(close(plugin_fd));
913
plugin *p = getplugin(direntries[i]->d_name);
646
plugin *p = getplugin(dirst->d_name, &plugin_list);
915
error(0, errno, "getplugin");
916
TEMP_FAILURE_RETRY(close(plugin_fd));
921
654
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
922
direntries[i]->d_name);
924
TEMP_FAILURE_RETRY(close(plugin_fd));
928
661
/* Add global arguments to argument list for this plugin */
929
plugin *g = getplugin(NULL);
662
plugin *g = getplugin(NULL, &plugin_list);
931
664
for(char **a = g->argv + 1; *a != NULL; a++){
932
665
if(not add_argument(p, *a)){
933
error(0, errno, "add_argument");
666
perror("add_argument");
936
669
/* Add global environment variables */
937
670
for(char **e = g->environ; *e != NULL; e++){
938
if(not add_environment(p, *e, false)){
939
error(0, errno, "add_environment");
671
if(not add_environment(p, *e)){
672
perror("add_environment");
944
/* If this plugin has any environment variables, we need to
945
duplicate the environment from this process, too. */
677
/* If this plugin has any environment variables, we will call
678
using execve and need to duplicate the environment from this
946
680
if(p->environ[0] != NULL){
947
681
for(char **e = environ; *e != NULL; e++){
948
if(not add_environment(p, *e, false)){
949
error(0, errno, "add_environment");
682
char *copy = strdup(*e);
687
if(not add_environment(p, copy)){
688
perror("add_environment");
956
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
957
#else /* O_CLOEXEC */
958
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
959
#endif /* O_CLOEXEC */
961
error(0, errno, "pipe");
962
exitstatus = EX_OSERR;
965
if(pipefd[0] >= FD_SETSIZE){
966
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
968
TEMP_FAILURE_RETRY(close(pipefd[0]));
969
TEMP_FAILURE_RETRY(close(pipefd[1]));
970
exitstatus = EX_OSERR;
974
/* Ask OS to automatic close the pipe on exec */
697
exitstatus = EXIT_FAILURE;
975
700
ret = set_cloexec_flag(pipefd[0]);
977
error(0, errno, "set_cloexec_flag");
978
TEMP_FAILURE_RETRY(close(pipefd[0]));
979
TEMP_FAILURE_RETRY(close(pipefd[1]));
980
exitstatus = EX_OSERR;
702
perror("set_cloexec_flag");
703
exitstatus = EXIT_FAILURE;
983
706
ret = set_cloexec_flag(pipefd[1]);
985
error(0, errno, "set_cloexec_flag");
986
TEMP_FAILURE_RETRY(close(pipefd[0]));
987
TEMP_FAILURE_RETRY(close(pipefd[1]));
988
exitstatus = EX_OSERR;
708
perror("set_cloexec_flag");
709
exitstatus = EXIT_FAILURE;
991
#endif /* not O_CLOEXEC */
992
712
/* Block SIGCHLD until process is safely in process list */
993
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
994
&sigchld_action.sa_mask,
713
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
997
error(0, errno, "sigprocmask");
998
exitstatus = EX_OSERR;
715
perror("sigprocmask");
716
exitstatus = EXIT_FAILURE;
1001
/* Starting a new process to be watched */
1005
} while(pid == -1 and errno == EINTR);
719
// Starting a new process to be watched
1007
error(0, errno, "fork");
1008
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1009
&sigchld_action.sa_mask, NULL));
1010
TEMP_FAILURE_RETRY(close(pipefd[0]));
1011
TEMP_FAILURE_RETRY(close(pipefd[1]));
1012
exitstatus = EX_OSERR;
723
exitstatus = EXIT_FAILURE;
1016
727
/* this is the child process */
1017
728
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1019
error(0, errno, "sigaction");
1022
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
733
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1024
error(0, errno, "sigprocmask");
735
perror("sigprocmask");
1028
739
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1030
error(0, errno, "dup2");
1034
if(fexecve(plugin_fd, p->argv,
1035
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1036
error(0, errno, "fexecve for %s/%s",
1037
plugindir != NULL ? plugindir : PDIR,
1038
direntries[i]->d_name);
746
/* If dir has no file descriptor, we could not set FD_CLOEXEC
747
above and must now close it manually here. */
750
if(p->environ[0] == NULL){
751
if(execv(filename, p->argv) < 0){
756
if(execve(filename, p->argv, p->environ) < 0){
1043
/* Parent process */
1044
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1046
TEMP_FAILURE_RETRY(close(plugin_fd));
1047
plugin *new_plugin = getplugin(direntries[i]->d_name);
1048
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
765
close(pipefd[1]); /* close unused write end of pipe */
766
process *new_process = malloc(sizeof(process));
767
if (new_process == NULL){
769
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1054
error(0, errno, "sigprocmask");
771
perror("sigprocmask");
1056
exitstatus = EX_OSERR;
773
exitstatus = EXIT_FAILURE;
1060
new_plugin->pid = pid;
1061
new_plugin->fd = pipefd[0];
777
*new_process = (struct process){ .pid = pid,
779
.next = process_list };
781
process_list = new_process;
1063
782
/* Unblock SIGCHLD so signal handler can be run if this process
1064
783
has already completed */
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
784
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
786
perror("sigprocmask");
787
exitstatus = EXIT_FAILURE;
1074
#if defined (__GNUC__) and defined (__GLIBC__)
1075
#if not __GLIBC_PREREQ(2, 16)
1076
#pragma GCC diagnostic push
1077
#pragma GCC diagnostic ignored "-Wsign-conversion"
1080
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1081
-Wconversion in GNU libc
1083
#if defined (__GNUC__) and defined (__GLIBC__)
1084
#if not __GLIBC_PREREQ(2, 16)
1085
#pragma GCC diagnostic pop
1089
if(maxfd < new_plugin->fd){
1090
maxfd = new_plugin->fd;
1096
TEMP_FAILURE_RETRY(close(dir_fd));
1098
free_plugin(getplugin(NULL));
1100
for(plugin *p = plugin_list; p != NULL; p = p->next){
1104
if(p->next == NULL){
1105
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1111
/* Main loop while running plugins exist */
791
FD_SET(new_process->fd, &rfds_all);
793
if (maxfd < new_process->fd){
794
maxfd = new_process->fd;
799
free_plugin_list(plugin_list);
805
if (process_list == NULL){
806
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1113
811
fd_set rfds = rfds_all;
1114
812
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1115
if(select_ret == -1 and errno != EINTR){
1116
error(0, errno, "select");
1117
exitstatus = EX_OSERR;
813
if (select_ret == -1){
815
exitstatus = EXIT_FAILURE;
1120
818
/* OK, now either a process completed, or something can be read
1121
819
from one of them */
1122
for(plugin *proc = plugin_list; proc != NULL;){
820
for(process *proc = process_list; proc ; proc = proc->next){
1123
821
/* Is this process completely done? */
1124
if(proc->completed and proc->eof){
822
if(proc->eof and proc->completed){
1125
823
/* Only accept the plugin output if it exited cleanly */
1126
824
if(not WIFEXITED(proc->status)
1127
825
or WEXITSTATUS(proc->status) != 0){
1128
826
/* Bad exit by plugin */
1131
828
if(WIFEXITED(proc->status)){
1132
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1133
" status %d\n", proc->name,
1134
(intmax_t) (proc->pid),
829
fprintf(stderr, "Plugin %u exited with status %d\n",
830
(unsigned int) (proc->pid),
1135
831
WEXITSTATUS(proc->status));
1136
} else if(WIFSIGNALED(proc->status)){
1137
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1138
" signal %d: %s\n", proc->name,
1139
(intmax_t) (proc->pid),
1140
WTERMSIG(proc->status),
1141
strsignal(WTERMSIG(proc->status)));
832
} else if(WIFSIGNALED(proc->status)) {
833
fprintf(stderr, "Plugin %u killed by signal %d\n",
834
(unsigned int) (proc->pid),
835
WTERMSIG(proc->status));
1142
836
} else if(WCOREDUMP(proc->status)){
1143
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1144
" core\n", proc->name, (intmax_t) (proc->pid));
837
fprintf(stderr, "Plugin %d dumped core\n",
838
(unsigned int) (proc->pid));
1148
841
/* Remove the plugin */
1149
#if defined (__GNUC__) and defined (__GLIBC__)
1150
#if not __GLIBC_PREREQ(2, 16)
1151
#pragma GCC diagnostic push
1152
#pragma GCC diagnostic ignored "-Wsign-conversion"
1155
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1156
-Wconversion in GNU libc
1158
#if defined (__GNUC__) and defined (__GLIBC__)
1159
#if not __GLIBC_PREREQ(2, 16)
1160
#pragma GCC diagnostic pop
842
FD_CLR(proc->fd, &rfds_all);
1164
843
/* Block signal while modifying process_list */
1165
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1167
&sigchld_action.sa_mask,
844
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1170
error(0, errno, "sigprocmask");
1171
exitstatus = EX_OSERR;
846
perror("sigprocmask");
847
exitstatus = EXIT_FAILURE;
1175
plugin *next_plugin = proc->next;
850
/* Delete this process entry from the list */
851
if(process_list == proc){
852
/* First one - simple */
853
process_list = proc->next;
855
/* Second one or later */
856
for(process *p = process_list; p != NULL; p = p->next){
858
p->next = proc->next;
1179
863
/* We are done modifying process list, so unblock signal */
1180
ret = (int)(TEMP_FAILURE_RETRY
1181
(sigprocmask(SIG_UNBLOCK,
1182
&sigchld_action.sa_mask, NULL)));
864
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1184
error(0, errno, "sigprocmask");
1185
exitstatus = EX_OSERR;
1189
if(plugin_list == NULL){
867
perror("sigprocmask");
871
/* We deleted this process from the list, so we can't go
872
proc->next. Therefore, start over from the beginning of
1196
876
/* This process exited nicely, so print its buffer */
1198
878
bool bret = print_out_password(proc->buffer,
1199
879
proc->buffer_length);
1201
error(0, errno, "print_out_password");
1202
exitstatus = EX_IOERR;
881
perror("print_out_password");
882
exitstatus = EXIT_FAILURE;
1207
886
/* This process has not completed. Does it have any output? */
1208
#if defined (__GNUC__) and defined (__GLIBC__)
1209
#if not __GLIBC_PREREQ(2, 16)
1210
#pragma GCC diagnostic push
1211
#pragma GCC diagnostic ignored "-Wsign-conversion"
1214
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1220
#if defined (__GNUC__) and defined (__GLIBC__)
1221
#if not __GLIBC_PREREQ(2, 16)
1222
#pragma GCC diagnostic pop
887
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1225
888
/* This process had nothing to say at this time */
1229
891
/* Before reading, make the process' data buffer large enough */
1230
892
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1231
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1232
+ (size_t) BUFFER_SIZE);
1233
if(new_buffer == NULL){
1234
error(0, errno, "malloc");
1235
exitstatus = EX_OSERR;
893
proc->buffer = realloc(proc->buffer, proc->buffer_size
894
+ (size_t) BUFFER_SIZE);
895
if (proc->buffer == NULL){
897
exitstatus = EXIT_FAILURE;
1238
proc->buffer = new_buffer;
1239
900
proc->buffer_size += BUFFER_SIZE;
1241
902
/* Read from the process */
1242
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1244
+ proc->buffer_length,
903
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1247
906
/* Read error from this process; ignore the error */
1253
911
proc->eof = true;
1255
proc->buffer_length += (size_t) sret;
913
proc->buffer_length += (size_t) ret;
1263
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1264
and exitstatus != EX_OK)){
921
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1265
922
/* Fallback if all plugins failed, none are found or an error
1268
925
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1269
926
char *passwordbuffer = getpass("Password: ");
1270
size_t len = strlen(passwordbuffer);
1271
/* Strip trailing newline */
1272
if(len > 0 and passwordbuffer[len-1] == '\n'){
1273
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1276
bret = print_out_password(passwordbuffer, len);
927
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1278
error(0, errno, "print_out_password");
1279
exitstatus = EX_IOERR;
929
perror("print_out_password");
930
exitstatus = EXIT_FAILURE;
1283
934
/* Restore old signal handler */
1284
935
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1286
error(0, errno, "sigaction");
1287
exitstatus = EX_OSERR;
938
exitstatus = EXIT_FAILURE;
1290
941
if(custom_argv != NULL){
1291
942
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1294
945
free(custom_argv);
1300
TEMP_FAILURE_RETRY(close(dir_fd));
947
free_plugin_list(plugin_list);
1303
/* Kill the processes */
1304
for(plugin *p = plugin_list; p != NULL; p = p->next){
1307
ret = kill(p->pid, SIGTERM);
1308
if(ret == -1 and errno != ESRCH){
1309
/* Set-uid proccesses might not get closed */
1310
error(0, errno, "kill");
953
/* Free the process list and kill the processes */
954
for(process *next; process_list != NULL; process_list = next){
955
next = process_list->next;
956
close(process_list->fd);
957
ret = kill(process_list->pid, SIGTERM);
958
if(ret == -1 and errno != ESRCH){
959
/* set-uid proccesses migth not get closed */
962
free(process_list->buffer);
1315
966
/* Wait for any remaining child processes to terminate */
1317
968
ret = wait(NULL);
1318
969
} while(ret >= 0);
1319
970
if(errno != ECHILD){
1320
error(0, errno, "wait");
1328
974
return exitstatus;