19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#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(),
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS(), WTERMSIG(),
42
#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
43
43
#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()
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
readdir(), closedir(), dirfd() */
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
47
fcntl(), setuid(), setgid(),
48
F_GETFD, F_SETFD, FD_CLOEXEC,
49
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
51
execv(), write(), read(),
52
53
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
FD_CLOEXEC, openat(), scandirat(),
55
#include <string.h> /* strsep, strlen(), strsignal(),
56
strcmp(), strncmp() */
55
#include <string.h> /* strsep, strlen(), asprintf() */
57
56
#include <errno.h> /* errno */
58
57
#include <argp.h> /* struct argp_option, struct
59
58
argp_state, struct argp,
63
62
#include <signal.h> /* struct sigaction, sigemptyset(),
64
63
sigaddset(), sigaction(),
65
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
SIG_UNBLOCK, kill(), sig_atomic_t
65
SIG_UNBLOCK, kill() */
68
66
#include <errno.h> /* errno, EBADF */
69
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
70
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
71
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
72
#include <errno.h> /* errno */
73
#include <error.h> /* error() */
74
#include <fnmatch.h> /* fnmatch() */
76
68
#define BUFFER_SIZE 256
78
70
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
82
73
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
74
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
85
76
typedef struct plugin{
86
77
char *name; /* can be NULL or any plugin name */
107
98
/* Gets an existing plugin based on name,
108
99
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
100
static plugin *getplugin(char *name){
111
/* Check for existing plugin with that name */
112
for(plugin *p = plugin_list; p != NULL; p = p->next){
114
or (p->name and name and (strcmp(p->name, name) == 0))){
101
/* Check for exiting plugin with that name */
102
for (plugin *p = plugin_list; p != NULL; p = p->next){
103
if ((p->name == name)
104
or (p->name and name and (strcmp(p->name, name) == 0))){
118
108
/* Create a new plugin */
119
plugin *new_plugin = NULL;
121
new_plugin = malloc(sizeof(plugin));
122
} while(new_plugin == NULL and errno == EINTR);
123
if(new_plugin == NULL){
109
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
126
113
char *copy_name = NULL;
127
114
if(name != NULL){
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
115
copy_name = strdup(name);
131
116
if(copy_name == NULL){
139
*new_plugin = (plugin){ .name = copy_name,
142
.next = plugin_list };
121
*new_plugin = (plugin) { .name = copy_name,
124
.next = plugin_list };
145
new_plugin->argv = malloc(sizeof(char *) * 2);
146
} while(new_plugin->argv == NULL and errno == EINTR);
147
if(new_plugin->argv == NULL){
126
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
150
129
free(new_plugin);
154
132
new_plugin->argv[0] = copy_name;
155
133
new_plugin->argv[1] = NULL;
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
135
new_plugin->environ = malloc(sizeof(char *));
160
136
if(new_plugin->environ == NULL){
163
138
free(new_plugin->argv);
164
139
free(new_plugin);
168
142
new_plugin->environ[0] = NULL;
416
369
.doc = "Group ID the plugins will run as", .group = 3 },
417
370
{ .name = "debug", .key = 132,
418
371
.doc = "Debug mode", .group = 4 },
419
{ .name = "plugin-helper-dir", .key = 133,
421
.doc = "Specify a different plugin helper directory",
424
* These reproduce what we would get without ARGP_NO_HELP
426
{ .name = "help", .key = '?',
427
.doc = "Give this help list", .group = -1 },
428
{ .name = "usage", .key = -3,
429
.doc = "Give a short usage message", .group = -1 },
430
{ .name = "version", .key = 'V',
431
.doc = "Print program version", .group = -1 },
435
__attribute__((nonnull(3)))
436
error_t parse_opt(int key, char *arg, struct argp_state *state){
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
441
378
case 'g': /* --global-options */
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
381
while((p = strsep(&arg, ",")) != NULL){
385
if(not add_argument(getplugin(NULL), p)){
386
perror("add_argument");
387
return ARGP_ERR_UNKNOWN;
452
392
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
457
400
case 'o': /* --options-for */
459
char *option_list = strchr(arg, ':');
460
if(option_list == NULL){
461
argp_error(state, "No colon in \"%s\"", arg);
468
argp_error(state, "Empty plugin name");
473
while((option = strsep(&option_list, ",")) != NULL){
474
if(not add_argument(getplugin(arg), option)){
402
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
406
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
411
while((p = strsep(&opt, ",")) != NULL){
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
481
422
case 'E': /* --env-for */
483
427
char *envdef = strchr(arg, ':');
484
428
if(envdef == NULL){
485
argp_error(state, "No colon in \"%s\"", arg);
492
argp_error(state, "Empty plugin name");
496
if(add_environment(getplugin(arg), envdef, true)){
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
501
437
case 'd': /* --disable */
503
439
plugin *p = getplugin(arg);
441
return ARGP_ERR_UNKNOWN;
510
446
case 'e': /* --enable */
512
448
plugin *p = getplugin(arg);
450
return ARGP_ERR_UNKNOWN;
519
455
case 128: /* --plugin-dir */
521
457
plugindir = strdup(arg);
522
if(plugindir != NULL){
458
if(plugindir == NULL){
526
462
case 129: /* --config-file */
527
463
/* This is already done by parse_opt_config_file() */
529
465
case 130: /* --userid */
530
tmp_id = strtoimax(arg, &tmp, 10);
531
if(errno != 0 or tmp == arg or *tmp != '\0'
532
or tmp_id != (uid_t)tmp_id){
533
argp_error(state, "Bad user ID number: \"%s\", using %"
534
PRIdMAX, arg, (intmax_t)uid);
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%ud", &uid);
469
fprintf(stderr, "Bad user ID number: \"%s\", using %ud\n",
540
473
case 131: /* --groupid */
541
tmp_id = strtoimax(arg, &tmp, 10);
542
if(errno != 0 or tmp == arg or *tmp != '\0'
543
or tmp_id != (gid_t)tmp_id){
544
argp_error(state, "Bad group ID number: \"%s\", using %"
545
PRIdMAX, arg, (intmax_t)gid);
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%ud", &gid);
477
fprintf(stderr, "Bad group ID number: \"%s\", using %ud\n",
551
481
case 132: /* --debug */
554
case 133: /* --plugin-helper-dir */
555
free(pluginhelperdir);
556
pluginhelperdir = strdup(arg);
557
if(pluginhelperdir != NULL){
562
* These reproduce what we would get without ARGP_NO_HELP
564
case '?': /* --help */
565
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
566
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
567
case -3: /* --usage */
568
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
569
argp_state_help(state, state->out_stream,
570
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
571
case 'V': /* --version */
572
fprintf(state->out_stream, "%s\n", argp_program_version);
576
485
* When adding more options before this line, remember to also add a
577
486
* "case" to the "parse_opt_config_file" function below.
693
591
new_arg = strdup(p);
694
592
if(new_arg == NULL){
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
594
exitstatus = EXIT_FAILURE;
701
599
custom_argc += 1;
703
char **new_argv = realloc(custom_argv, sizeof(char *)
704
* ((size_t)custom_argc + 1));
705
if(new_argv == NULL){
706
error(0, errno, "realloc");
707
exitstatus = EX_OSERR;
712
custom_argv = new_argv;
600
custom_argv = realloc(custom_argv, sizeof(char *)
601
* ((unsigned int) custom_argc + 1));
602
if(custom_argv == NULL){
604
exitstatus = EXIT_FAILURE;
715
608
custom_argv[custom_argc-1] = new_arg;
716
custom_argv[custom_argc] = NULL;
609
custom_argv[custom_argc] = NULL;
720
ret = fclose(conffp);
721
} while(ret == EOF and errno == EINTR);
723
error(0, errno, "fclose");
724
exitstatus = EX_IOERR;
729
614
/* Check for harmful errors and go to fallback. Other errors might
730
615
not affect opening plugins */
731
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
732
error(0, errno, "fopen");
733
exitstatus = EX_OSERR;
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
618
exitstatus = EXIT_FAILURE;
737
/* If there were any arguments from the configuration file, pass
738
them to parser as command line arguments */
622
/* If there was any arguments from configuration file,
623
pass them to parser as command arguments */
739
624
if(custom_argv != NULL){
740
ret = argp_parse(&argp, custom_argc, custom_argv,
741
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
749
error(0, errno, "argp_parse");
750
exitstatus = EX_OSERR;
753
exitstatus = EX_CONFIG;
625
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
627
if (ret == ARGP_ERR_UNKNOWN){
628
fprintf(stderr, "Unknown error while parsing arguments\n");
629
exitstatus = EXIT_FAILURE;
758
634
/* Parse actual command line arguments, to let them override the
760
ret = argp_parse(&argp, argc, argv,
761
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
769
error(0, errno, "argp_parse");
770
exitstatus = EX_OSERR;
773
exitstatus = EX_USAGE;
778
char *pluginhelperenv;
780
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
781
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
783
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
785
if(ret == -1 or not bret){
786
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
787
" environment variable to \"%s\" for all plugins\n",
788
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
791
free(pluginhelperenv);
636
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if (ret == ARGP_ERR_UNKNOWN){
638
fprintf(stderr, "Unknown error while parsing arguments\n");
639
exitstatus = EXIT_FAILURE;
799
647
for(char **a = p->argv; *a != NULL; a++){
800
648
fprintf(stderr, "\tArg: %s\n", *a);
802
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
803
651
for(char **a = p->environ; *a != NULL; a++){
804
652
fprintf(stderr, "\t%s\n", *a);
810
/* Work around Debian bug #633582:
811
<http://bugs.debian.org/633582> */
812
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
813
if(plugindir_fd == -1){
815
error(0, errno, "open(\"" PDIR "\")");
818
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
820
error(0, errno, "fstat");
822
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
823
ret = fchown(plugindir_fd, uid, gid);
825
error(0, errno, "fchown");
833
/* Lower permissions */
836
error(0, errno, "setgid");
657
/* Strip permissions down to nobody */
838
658
ret = setuid(uid);
840
error(0, errno, "setuid");
843
/* Open plugin directory with close_on_exec flag */
667
if (plugindir == NULL){
670
dir = opendir(plugindir);
674
perror("Could not open plugin dir");
675
exitstatus = EXIT_FAILURE;
679
/* Set the FD_CLOEXEC flag on the directory, if possible */
845
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
848
#else /* not O_CLOEXEC */
850
#endif /* not O_CLOEXEC */
853
error(0, errno, "Could not open plugin dir");
854
exitstatus = EX_UNAVAILABLE;
859
/* Set the FD_CLOEXEC flag on the directory */
860
ret = set_cloexec_flag(dir_fd);
862
error(0, errno, "set_cloexec_flag");
863
exitstatus = EX_OSERR;
866
#endif /* O_CLOEXEC */
869
int good_name(const struct dirent * const dirent){
870
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
871
"*.dpkg-old", "*.dpkg-bak",
872
"*.dpkg-divert", NULL };
874
#pragma GCC diagnostic push
875
#pragma GCC diagnostic ignored "-Wcast-qual"
877
for(const char **pat = (const char **)patterns;
878
*pat != NULL; pat++){
880
#pragma GCC diagnostic pop
882
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
885
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
886
" matching pattern %s\n", dirent->d_name, *pat);
681
int dir_fd = dirfd(dir);
683
ret = set_cloexec_flag(dir_fd);
685
perror("set_cloexec_flag");
686
exitstatus = EXIT_FAILURE;
895
#if __GLIBC_PREREQ(2, 15)
896
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
898
#else /* not __GLIBC_PREREQ(2, 15) */
899
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
900
&direntries, good_name, alphasort);
901
#endif /* not __GLIBC_PREREQ(2, 15) */
902
#else /* not __GLIBC__ */
903
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
904
&direntries, good_name, alphasort);
905
#endif /* not __GLIBC__ */
906
if(numplugins == -1){
907
error(0, errno, "Could not scan plugin dir");
909
exitstatus = EX_OSERR;
913
692
FD_ZERO(&rfds_all);
915
694
/* Read and execute any executable in the plugin directory*/
916
for(int i = 0; i < numplugins; i++){
918
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
920
error(0, errno, "Could not open plugin");
924
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
926
error(0, errno, "stat");
696
dirst = readdir(dir);
698
/* All directory entries have been processed */
702
exitstatus = EXIT_FAILURE;
708
d_name_len = strlen(dirst->d_name);
710
/* Ignore dotfiles, backup files and other junk */
712
bool bad_name = false;
714
const char const *bad_prefixes[] = { ".", "#", NULL };
716
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
719
".dpkg-divert", NULL };
720
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
721
size_t pre_len = strlen(*pre);
722
if((d_name_len >= pre_len)
723
and strncmp((dirst->d_name), *pre, pre_len) == 0){
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad prefix %s\n", dirst->d_name, *pre);
735
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
736
size_t suf_len = strlen(*suf);
737
if((d_name_len >= suf_len)
738
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
741
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
742
" with bad suffix %s\n", dirst->d_name, *suf);
755
if(plugindir == NULL){
756
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
758
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
765
ret = stat(filename, &st);
932
772
/* Ignore non-executable files */
933
if(not S_ISREG(st.st_mode)
934
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
773
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
937
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
938
" with bad type or mode\n",
939
plugindir != NULL ? plugindir : PDIR,
940
direntries[i]->d_name);
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
" with bad type or mode\n", filename);
947
plugin *p = getplugin(direntries[i]->d_name);
782
plugin *p = getplugin(dirst->d_name);
949
error(0, errno, "getplugin");
956
790
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
957
direntries[i]->d_name);
967
800
for(char **a = g->argv + 1; *a != NULL; a++){
968
801
if(not add_argument(p, *a)){
969
error(0, errno, "add_argument");
802
perror("add_argument");
972
805
/* Add global environment variables */
973
806
for(char **e = g->environ; *e != NULL; e++){
974
807
if(not add_environment(p, *e, false)){
975
error(0, errno, "add_environment");
808
perror("add_environment");
980
/* If this plugin has any environment variables, we need to
981
duplicate the environment from this process, too. */
813
/* If this plugin has any environment variables, we will call
814
using execve and need to duplicate the environment from this
982
816
if(p->environ[0] != NULL){
983
817
for(char **e = environ; *e != NULL; e++){
984
818
if(not add_environment(p, *e, false)){
985
error(0, errno, "add_environment");
819
perror("add_environment");
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
993
#else /* O_CLOEXEC */
994
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
995
#endif /* O_CLOEXEC */
997
error(0, errno, "pipe");
998
exitstatus = EX_OSERR;
1002
if(pipefd[0] >= FD_SETSIZE){
1003
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1007
exitstatus = EX_OSERR;
1008
free(direntries[i]);
828
exitstatus = EXIT_FAILURE;
1012
831
/* Ask OS to automatic close the pipe on exec */
1013
832
ret = set_cloexec_flag(pipefd[0]);
1015
error(0, errno, "set_cloexec_flag");
1018
exitstatus = EX_OSERR;
1019
free(direntries[i]);
834
perror("set_cloexec_flag");
835
exitstatus = EXIT_FAILURE;
1022
838
ret = set_cloexec_flag(pipefd[1]);
1024
error(0, errno, "set_cloexec_flag");
1027
exitstatus = EX_OSERR;
1028
free(direntries[i]);
840
perror("set_cloexec_flag");
841
exitstatus = EXIT_FAILURE;
1031
#endif /* not O_CLOEXEC */
1032
844
/* Block SIGCHLD until process is safely in process list */
1033
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1034
&sigchld_action.sa_mask,
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1037
error(0, errno, "sigprocmask");
1038
exitstatus = EX_OSERR;
1039
free(direntries[i]);
847
perror("sigprocmask");
848
exitstatus = EXIT_FAILURE;
1042
851
/* Starting a new process to be watched */
1046
} while(pid == -1 and errno == EINTR);
1048
error(0, errno, "fork");
1049
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1050
&sigchld_action.sa_mask, NULL));
1053
exitstatus = EX_OSERR;
1054
free(direntries[i]);
855
exitstatus = EXIT_FAILURE;
1058
859
/* this is the child process */
1059
860
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1061
error(0, errno, "sigaction");
1064
865
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1066
error(0, errno, "sigprocmask");
867
perror("sigprocmask");
1070
871
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1072
error(0, errno, "dup2");
1076
if(fexecve(plugin_fd, p->argv,
1077
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1078
error(0, errno, "fexecve for %s/%s",
1079
plugindir != NULL ? plugindir : PDIR,
1080
direntries[i]->d_name);
878
/* If dir has no file descriptor, we could not set FD_CLOEXEC
879
above and must now close it manually here. */
882
if(p->environ[0] == NULL){
883
if(execv(filename, p->argv) < 0){
888
if(execve(filename, p->argv, p->environ) < 0){
1085
895
/* Parent process */
1086
896
close(pipefd[1]); /* Close unused write end of pipe */
1088
plugin *new_plugin = getplugin(direntries[i]->d_name);
1089
if(new_plugin == NULL){
1090
error(0, errno, "getplugin");
1091
ret = (int)(TEMP_FAILURE_RETRY
1092
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
898
plugin *new_plugin = getplugin(dirst->d_name);
899
if (new_plugin == NULL){
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1095
error(0, errno, "sigprocmask");
903
perror("sigprocmask");
1097
exitstatus = EX_OSERR;
1098
free(direntries[i]);
905
exitstatus = EXIT_FAILURE;
1101
free(direntries[i]);
1103
909
new_plugin->pid = pid;
1104
910
new_plugin->fd = pipefd[0];
1106
912
/* Unblock SIGCHLD so signal handler can be run if this process
1107
913
has already completed */
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1109
&sigchld_action.sa_mask,
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1112
error(0, errno, "sigprocmask");
1113
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1117
#if defined (__GNUC__) and defined (__GLIBC__)
1118
#if not __GLIBC_PREREQ(2, 16)
1119
#pragma GCC diagnostic push
1120
#pragma GCC diagnostic ignored "-Wsign-conversion"
1123
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1124
-Wconversion in GNU libc
1126
#if defined (__GNUC__) and defined (__GLIBC__)
1127
#if not __GLIBC_PREREQ(2, 16)
1128
#pragma GCC diagnostic pop
921
FD_SET(new_plugin->fd, &rfds_all);
1132
if(maxfd < new_plugin->fd){
923
if (maxfd < new_plugin->fd){
1133
924
maxfd = new_plugin->fd;
1141
free_plugin(getplugin(NULL));
1143
931
for(plugin *p = plugin_list; p != NULL; p = p->next){
1144
932
if(p->pid != 0){
1155
943
while(plugin_list){
1156
944
fd_set rfds = rfds_all;
1157
945
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1158
if(select_ret == -1 and errno != EINTR){
1159
error(0, errno, "select");
1160
exitstatus = EX_OSERR;
946
if (select_ret == -1){
948
exitstatus = EXIT_FAILURE;
1163
951
/* OK, now either a process completed, or something can be read
1164
952
from one of them */
1165
953
for(plugin *proc = plugin_list; proc != NULL;){
1166
954
/* Is this process completely done? */
1167
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
1168
956
/* Only accept the plugin output if it exited cleanly */
1169
957
if(not WIFEXITED(proc->status)
1170
958
or WEXITSTATUS(proc->status) != 0){
1171
959
/* Bad exit by plugin */
1174
962
if(WIFEXITED(proc->status)){
1175
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1176
" status %d\n", proc->name,
1177
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
1178
965
WEXITSTATUS(proc->status));
1179
} else if(WIFSIGNALED(proc->status)){
1180
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1181
" signal %d: %s\n", proc->name,
1182
(intmax_t) (proc->pid),
1183
WTERMSIG(proc->status),
1184
strsignal(WTERMSIG(proc->status)));
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
969
WTERMSIG(proc->status));
1185
970
} else if(WCOREDUMP(proc->status)){
1186
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1187
" core\n", proc->name, (intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %d dumped core\n",
972
(unsigned int) (proc->pid));
1191
976
/* Remove the plugin */
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic push
1195
#pragma GCC diagnostic ignored "-Wsign-conversion"
1198
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1199
-Wconversion in GNU libc
1201
#if defined (__GNUC__) and defined (__GLIBC__)
1202
#if not __GLIBC_PREREQ(2, 16)
1203
#pragma GCC diagnostic pop
977
FD_CLR(proc->fd, &rfds_all);
1207
979
/* Block signal while modifying process_list */
1208
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1210
&sigchld_action.sa_mask,
980
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1213
error(0, errno, "sigprocmask");
1214
exitstatus = EX_OSERR;
982
perror("sigprocmask");
983
exitstatus = EXIT_FAILURE;
1241
1009
bool bret = print_out_password(proc->buffer,
1242
1010
proc->buffer_length);
1244
error(0, errno, "print_out_password");
1245
exitstatus = EX_IOERR;
1012
perror("print_out_password");
1013
exitstatus = EXIT_FAILURE;
1250
1018
/* This process has not completed. Does it have any output? */
1251
#if defined (__GNUC__) and defined (__GLIBC__)
1252
#if not __GLIBC_PREREQ(2, 16)
1253
#pragma GCC diagnostic push
1254
#pragma GCC diagnostic ignored "-Wsign-conversion"
1257
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1263
#if defined (__GNUC__) and defined (__GLIBC__)
1264
#if not __GLIBC_PREREQ(2, 16)
1265
#pragma GCC diagnostic pop
1019
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1268
1020
/* This process had nothing to say at this time */
1269
1021
proc = proc->next;
1272
1024
/* Before reading, make the process' data buffer large enough */
1273
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1274
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1275
+ (size_t) BUFFER_SIZE);
1276
if(new_buffer == NULL){
1277
error(0, errno, "malloc");
1278
exitstatus = EX_OSERR;
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
+ (size_t) BUFFER_SIZE);
1028
if (proc->buffer == NULL){
1030
exitstatus = EXIT_FAILURE;
1281
proc->buffer = new_buffer;
1282
1033
proc->buffer_size += BUFFER_SIZE;
1284
1035
/* Read from the process */
1285
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1287
+ proc->buffer_length,
1036
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1290
1039
/* Read error from this process; ignore the error */
1291
1040
proc = proc->next;