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,
63
61
#include <signal.h> /* struct sigaction, sigemptyset(),
64
62
sigaddset(), sigaction(),
65
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
66
SIG_UNBLOCK, kill(), sig_atomic_t
64
SIG_UNBLOCK, kill() */
68
65
#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
67
#define BUFFER_SIZE 256
78
69
#define PDIR "/lib/mandos/plugins.d"
79
#define PHDIR "/lib/mandos/plugin-helpers"
80
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
82
const char *argp_program_version = "plugin-runner " VERSION;
83
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
85
75
typedef struct plugin{
86
76
char *name; /* can be NULL or any plugin name */
107
97
/* Gets an existing plugin based on name,
108
98
or if none is found, creates a new one */
109
__attribute__((warn_unused_result))
110
99
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))){
100
/* Check for exiting plugin with that name */
101
for (plugin *p = plugin_list; p != NULL; p = p->next){
102
if ((p->name == name)
103
or (p->name and name and (strcmp(p->name, name) == 0))){
118
107
/* 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){
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
126
112
char *copy_name = NULL;
127
113
if(name != NULL){
129
copy_name = strdup(name);
130
} while(copy_name == NULL and errno == EINTR);
114
copy_name = strdup(name);
131
115
if(copy_name == NULL){
139
*new_plugin = (plugin){ .name = copy_name,
142
.next = plugin_list };
120
*new_plugin = (plugin) { .name = copy_name,
123
.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){
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
150
128
free(new_plugin);
154
131
new_plugin->argv[0] = copy_name;
155
132
new_plugin->argv[1] = NULL;
158
new_plugin->environ = malloc(sizeof(char *));
159
} while(new_plugin->environ == NULL and errno == EINTR);
134
new_plugin->environ = malloc(sizeof(char *));
160
135
if(new_plugin->environ == NULL){
163
137
free(new_plugin->argv);
164
138
free(new_plugin);
168
141
new_plugin->environ[0] = NULL;
416
367
.doc = "Group ID the plugins will run as", .group = 3 },
417
368
{ .name = "debug", .key = 132,
418
369
.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){
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
441
376
case 'g': /* --global-options */
444
while((plugin_option = strsep(&arg, ",")) != NULL){
445
if(not add_argument(getplugin(NULL), plugin_option)){
379
while((p = strsep(&arg, ",")) != NULL){
383
if(not add_argument(getplugin(NULL), p)){
384
perror("add_argument");
385
return ARGP_ERR_UNKNOWN;
452
390
case 'G': /* --global-env */
453
if(add_environment(getplugin(NULL), arg, true)){
394
if(not add_environment(getplugin(NULL), arg, true)){
395
perror("add_environment");
457
398
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)){
400
char *p_name = strsep(&arg, ":");
401
if(p_name[0] == '\0' or arg == NULL){
404
char *opt = strsep(&arg, ":");
405
if(opt[0] == '\0' or opt == NULL){
409
while((p = strsep(&opt, ",")) != NULL){
413
if(not add_argument(getplugin(p_name), p)){
414
perror("add_argument");
415
return ARGP_ERR_UNKNOWN;
481
420
case 'E': /* --env-for */
483
425
char *envdef = strchr(arg, ':');
484
426
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)){
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
501
435
case 'd': /* --disable */
503
437
plugin *p = getplugin(arg);
439
return ARGP_ERR_UNKNOWN;
510
444
case 'e': /* --enable */
512
446
plugin *p = getplugin(arg);
448
return ARGP_ERR_UNKNOWN;
519
453
case 128: /* --plugin-dir */
521
455
plugindir = strdup(arg);
522
if(plugindir != NULL){
456
if(plugindir == NULL){
526
460
case 129: /* --config-file */
527
461
/* This is already done by parse_opt_config_file() */
529
463
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);
464
uid = (uid_t)strtol(arg, NULL, 10);
540
466
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);
467
gid = (gid_t)strtol(arg, NULL, 10);
551
469
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
* When adding more options before this line, remember to also add a
577
* "case" to the "parse_opt_config_file" function below.
579
472
case ARGP_KEY_ARG:
580
473
/* Cryptsetup always passes an argument, which is an empty
581
474
string if "none" was specified in /etc/crypttab. So if
582
475
argument was empty, we ignore it silently. */
477
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
587
483
return ARGP_ERR_UNKNOWN;
589
return errno; /* Set to 0 at start */
592
488
/* This option parser is the same as parse_opt() above, except it
593
489
ignores everything but the --config-file option. */
594
error_t parse_opt_config_file(int key, char *arg,
595
__attribute__((unused))
596
struct argp_state *state){
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
599
494
case 'g': /* --global-options */
600
495
case 'G': /* --global-env */
601
496
case 'o': /* --options-for */
693
576
new_arg = strdup(p);
694
577
if(new_arg == NULL){
695
error(0, errno, "strdup");
696
exitstatus = EX_OSERR;
579
exitstatus = EXIT_FAILURE;
701
584
custom_argc += 1;
703
char **new_argv = realloc(custom_argv, sizeof(char *)
706
if(new_argv == NULL){
707
error(0, errno, "realloc");
708
exitstatus = EX_OSERR;
713
custom_argv = new_argv;
585
custom_argv = realloc(custom_argv, sizeof(char *)
586
* ((unsigned int) custom_argc + 1));
587
if(custom_argv == NULL){
589
exitstatus = EXIT_FAILURE;
716
593
custom_argv[custom_argc-1] = new_arg;
717
custom_argv[custom_argc] = NULL;
594
custom_argv[custom_argc] = NULL;
721
ret = fclose(conffp);
722
} while(ret == EOF and errno == EINTR);
724
error(0, errno, "fclose");
725
exitstatus = EX_IOERR;
730
599
/* Check for harmful errors and go to fallback. Other errors might
731
600
not affect opening plugins */
732
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
733
error(0, errno, "fopen");
734
exitstatus = EX_OSERR;
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
exitstatus = EXIT_FAILURE;
738
/* If there were any arguments from the configuration file, pass
739
them to parser as command line arguments */
607
/* If there was any arguments from configuration file,
608
pass them to parser as command arguments */
740
609
if(custom_argv != NULL){
741
ret = argp_parse(&argp, custom_argc, custom_argv,
742
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
750
error(0, errno, "argp_parse");
751
exitstatus = EX_OSERR;
754
exitstatus = EX_CONFIG;
610
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
612
if (ret == ARGP_ERR_UNKNOWN){
613
fprintf(stderr, "Unknown error while parsing arguments\n");
614
exitstatus = EXIT_FAILURE;
759
619
/* Parse actual command line arguments, to let them override the
761
ret = argp_parse(&argp, argc, argv,
762
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
770
error(0, errno, "argp_parse");
771
exitstatus = EX_OSERR;
774
exitstatus = EX_USAGE;
779
char *pluginhelperenv;
781
ret = asprintf(&pluginhelperenv, "MANDOSPLUGINHELPERDIR=%s",
782
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
784
bret = add_environment(getplugin(NULL), pluginhelperenv, true);
786
if(ret == -1 or not bret){
787
error(0, errno, "Failed to set MANDOSPLUGINHELPERDIR"
788
" environment variable to \"%s\" for all plugins\n",
789
pluginhelperdir != NULL ? pluginhelperdir : PHDIR);
792
free(pluginhelperenv);
621
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
622
if (ret == ARGP_ERR_UNKNOWN){
623
fprintf(stderr, "Unknown error while parsing arguments\n");
624
exitstatus = EXIT_FAILURE;
800
632
for(char **a = p->argv; *a != NULL; a++){
801
633
fprintf(stderr, "\tArg: %s\n", *a);
803
fprintf(stderr, "...and %d environment variables\n", p->envc);
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
804
636
for(char **a = p->environ; *a != NULL; a++){
805
637
fprintf(stderr, "\t%s\n", *a);
811
/* Work around Debian bug #633582:
812
<http://bugs.debian.org/633582> */
813
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
814
if(plugindir_fd == -1){
816
error(0, errno, "open(\"" PDIR "\")");
819
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
821
error(0, errno, "fstat");
823
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
824
ret = fchown(plugindir_fd, uid, gid);
826
error(0, errno, "fchown");
834
/* Lower permissions */
837
error(0, errno, "setgid");
642
/* Strip permissions down to nobody */
839
643
ret = setuid(uid);
841
error(0, errno, "setuid");
844
/* Open plugin directory with close_on_exec flag */
652
if (plugindir == NULL){
655
dir = opendir(plugindir);
659
perror("Could not open plugin dir");
660
exitstatus = EXIT_FAILURE;
664
/* Set the FD_CLOEXEC flag on the directory, if possible */
846
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
849
#else /* not O_CLOEXEC */
851
#endif /* not O_CLOEXEC */
854
error(0, errno, "Could not open plugin dir");
855
exitstatus = EX_UNAVAILABLE;
860
/* Set the FD_CLOEXEC flag on the directory */
861
ret = set_cloexec_flag(dir_fd);
863
error(0, errno, "set_cloexec_flag");
864
exitstatus = EX_OSERR;
867
#endif /* O_CLOEXEC */
870
int good_name(const struct dirent * const dirent){
871
const char * const patterns[] = { ".*", "#*#", "*~", "*.dpkg-new",
872
"*.dpkg-old", "*.dpkg-bak",
873
"*.dpkg-divert", NULL };
875
#pragma GCC diagnostic push
876
#pragma GCC diagnostic ignored "-Wcast-qual"
878
for(const char **pat = (const char **)patterns;
879
*pat != NULL; pat++){
881
#pragma GCC diagnostic pop
883
if(fnmatch(*pat, dirent->d_name, FNM_FILE_NAME | FNM_PERIOD)
886
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
887
" matching pattern %s\n", dirent->d_name, *pat);
666
int dir_fd = dirfd(dir);
668
ret = set_cloexec_flag(dir_fd);
670
perror("set_cloexec_flag");
671
exitstatus = EXIT_FAILURE;
896
#if __GLIBC_PREREQ(2, 15)
897
int numplugins = scandirat(dir_fd, ".", &direntries, good_name,
899
#else /* not __GLIBC_PREREQ(2, 15) */
900
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
901
&direntries, good_name, alphasort);
902
#endif /* not __GLIBC_PREREQ(2, 15) */
903
#else /* not __GLIBC__ */
904
int numplugins = scandir(plugindir != NULL ? plugindir : PDIR,
905
&direntries, good_name, alphasort);
906
#endif /* not __GLIBC__ */
907
if(numplugins == -1){
908
error(0, errno, "Could not scan plugin dir");
910
exitstatus = EX_OSERR;
914
677
FD_ZERO(&rfds_all);
916
679
/* Read and execute any executable in the plugin directory*/
917
for(int i = 0; i < numplugins; i++){
919
int plugin_fd = openat(dir_fd, direntries[i]->d_name, O_RDONLY);
921
error(0, errno, "Could not open plugin");
925
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
927
error(0, errno, "stat");
681
dirst = readdir(dir);
683
/* All directory entries have been processed */
687
exitstatus = EXIT_FAILURE;
693
d_name_len = strlen(dirst->d_name);
695
/* Ignore dotfiles, backup files and other junk */
697
bool bad_name = false;
699
const char const *bad_prefixes[] = { ".", "#", NULL };
701
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
703
".dpkg-divert", NULL };
704
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
705
size_t pre_len = strlen(*pre);
706
if((d_name_len >= pre_len)
707
and strncmp((dirst->d_name), *pre, pre_len) == 0){
709
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
710
" with bad prefix %s\n", dirst->d_name, *pre);
719
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
720
size_t suf_len = strlen(*suf);
721
if((d_name_len >= suf_len)
722
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
725
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
726
" with bad suffix %s\n", dirst->d_name, *suf);
739
if(plugindir == NULL){
740
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
742
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
749
ret = stat(filename, &st);
933
756
/* Ignore non-executable files */
934
if(not S_ISREG(st.st_mode)
935
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, direntries[i]->d_name,
757
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
938
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
939
" with bad type or mode\n",
940
plugindir != NULL ? plugindir : PDIR,
941
direntries[i]->d_name);
759
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
760
" with bad type or mode\n", filename);
948
plugin *p = getplugin(direntries[i]->d_name);
766
plugin *p = getplugin(dirst->d_name);
950
error(0, errno, "getplugin");
957
774
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
958
direntries[i]->d_name);
968
784
for(char **a = g->argv + 1; *a != NULL; a++){
969
785
if(not add_argument(p, *a)){
970
error(0, errno, "add_argument");
786
perror("add_argument");
973
789
/* Add global environment variables */
974
790
for(char **e = g->environ; *e != NULL; e++){
975
791
if(not add_environment(p, *e, false)){
976
error(0, errno, "add_environment");
792
perror("add_environment");
981
/* If this plugin has any environment variables, we need to
982
duplicate the environment from this process, too. */
797
/* If this plugin has any environment variables, we will call
798
using execve and need to duplicate the environment from this
983
800
if(p->environ[0] != NULL){
984
801
for(char **e = environ; *e != NULL; e++){
985
802
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
803
perror("add_environment");
993
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
#else /* O_CLOEXEC */
995
ret = (int)TEMP_FAILURE_RETRY(pipe2(pipefd, O_CLOEXEC));
996
#endif /* O_CLOEXEC */
998
error(0, errno, "pipe");
999
exitstatus = EX_OSERR;
1000
free(direntries[i]);
1003
if(pipefd[0] >= FD_SETSIZE){
1004
fprintf(stderr, "pipe()[0] (%d) >= FD_SETSIZE (%d)", pipefd[0],
1008
exitstatus = EX_OSERR;
1009
free(direntries[i]);
812
exitstatus = EXIT_FAILURE;
1013
815
/* Ask OS to automatic close the pipe on exec */
1014
816
ret = set_cloexec_flag(pipefd[0]);
1016
error(0, errno, "set_cloexec_flag");
1019
exitstatus = EX_OSERR;
1020
free(direntries[i]);
818
perror("set_cloexec_flag");
819
exitstatus = EXIT_FAILURE;
1023
822
ret = set_cloexec_flag(pipefd[1]);
1025
error(0, errno, "set_cloexec_flag");
1028
exitstatus = EX_OSERR;
1029
free(direntries[i]);
824
perror("set_cloexec_flag");
825
exitstatus = EXIT_FAILURE;
1032
#endif /* not O_CLOEXEC */
1033
828
/* Block SIGCHLD until process is safely in process list */
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1035
&sigchld_action.sa_mask,
829
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1038
error(0, errno, "sigprocmask");
1039
exitstatus = EX_OSERR;
1040
free(direntries[i]);
831
perror("sigprocmask");
832
exitstatus = EXIT_FAILURE;
1043
835
/* Starting a new process to be watched */
1047
} while(pid == -1 and errno == EINTR);
1049
error(0, errno, "fork");
1050
TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL));
1054
exitstatus = EX_OSERR;
1055
free(direntries[i]);
839
exitstatus = EXIT_FAILURE;
1059
843
/* this is the child process */
1060
844
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1062
error(0, errno, "sigaction");
1065
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
849
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1067
error(0, errno, "sigprocmask");
851
perror("sigprocmask");
1071
855
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1073
error(0, errno, "dup2");
1077
if(fexecve(plugin_fd, p->argv,
1078
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1079
error(0, errno, "fexecve for %s/%s",
1080
plugindir != NULL ? plugindir : PDIR,
1081
direntries[i]->d_name);
862
/* If dir has no file descriptor, we could not set FD_CLOEXEC
863
above and must now close it manually here. */
866
if(p->environ[0] == NULL){
867
if(execv(filename, p->argv) < 0){
872
if(execve(filename, p->argv, p->environ) < 0){
1086
879
/* Parent process */
1087
880
close(pipefd[1]); /* Close unused write end of pipe */
1089
plugin *new_plugin = getplugin(direntries[i]->d_name);
1090
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
882
plugin *new_plugin = getplugin(dirst->d_name);
883
if (new_plugin == NULL){
885
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1096
error(0, errno, "sigprocmask");
887
perror("sigprocmask");
1098
exitstatus = EX_OSERR;
1099
free(direntries[i]);
889
exitstatus = EXIT_FAILURE;
1102
free(direntries[i]);
1104
893
new_plugin->pid = pid;
1105
894
new_plugin->fd = pipefd[0];
1107
896
/* Unblock SIGCHLD so signal handler can be run if this process
1108
897
has already completed */
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1110
&sigchld_action.sa_mask,
898
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1113
error(0, errno, "sigprocmask");
1114
exitstatus = EX_OSERR;
900
perror("sigprocmask");
901
exitstatus = EXIT_FAILURE;
1118
#if defined (__GNUC__) and defined (__GLIBC__)
1119
#if not __GLIBC_PREREQ(2, 16)
1120
#pragma GCC diagnostic push
1121
#pragma GCC diagnostic ignored "-Wsign-conversion"
1124
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1125
-Wconversion in GNU libc
1127
#if defined (__GNUC__) and defined (__GLIBC__)
1128
#if not __GLIBC_PREREQ(2, 16)
1129
#pragma GCC diagnostic pop
905
FD_SET(new_plugin->fd, &rfds_all);
1133
if(maxfd < new_plugin->fd){
907
if (maxfd < new_plugin->fd){
1134
908
maxfd = new_plugin->fd;
1142
free_plugin(getplugin(NULL));
1144
916
for(plugin *p = plugin_list; p != NULL; p = p->next){
1145
917
if(p->pid != 0){
1151
923
free_plugin_list();
1155
927
/* Main loop while running plugins exist */
1156
928
while(plugin_list){
1157
929
fd_set rfds = rfds_all;
1158
930
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1159
if(select_ret == -1 and errno != EINTR){
1160
error(0, errno, "select");
1161
exitstatus = EX_OSERR;
931
if (select_ret == -1){
933
exitstatus = EXIT_FAILURE;
1164
936
/* OK, now either a process completed, or something can be read
1165
937
from one of them */
1166
938
for(plugin *proc = plugin_list; proc != NULL;){
1167
939
/* Is this process completely done? */
1168
if(proc->completed and proc->eof){
940
if(proc->eof and proc->completed){
1169
941
/* Only accept the plugin output if it exited cleanly */
1170
942
if(not WIFEXITED(proc->status)
1171
943
or WEXITSTATUS(proc->status) != 0){
1172
944
/* Bad exit by plugin */
1175
947
if(WIFEXITED(proc->status)){
1176
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1177
" status %d\n", proc->name,
1178
(intmax_t) (proc->pid),
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
1179
950
WEXITSTATUS(proc->status));
1180
} else if(WIFSIGNALED(proc->status)){
1181
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1182
" signal %d: %s\n", proc->name,
1183
(intmax_t) (proc->pid),
1184
WTERMSIG(proc->status),
1185
strsignal(WTERMSIG(proc->status)));
951
} else if(WIFSIGNALED(proc->status)) {
952
fprintf(stderr, "Plugin %u killed by signal %d\n",
953
(unsigned int) (proc->pid),
954
WTERMSIG(proc->status));
1186
955
} else if(WCOREDUMP(proc->status)){
1187
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1188
" core\n", proc->name, (intmax_t) (proc->pid));
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
1192
961
/* Remove the plugin */
1193
#if defined (__GNUC__) and defined (__GLIBC__)
1194
#if not __GLIBC_PREREQ(2, 16)
1195
#pragma GCC diagnostic push
1196
#pragma GCC diagnostic ignored "-Wsign-conversion"
1199
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1200
-Wconversion in GNU libc
1202
#if defined (__GNUC__) and defined (__GLIBC__)
1203
#if not __GLIBC_PREREQ(2, 16)
1204
#pragma GCC diagnostic pop
962
FD_CLR(proc->fd, &rfds_all);
1208
964
/* Block signal while modifying process_list */
1209
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1211
&sigchld_action.sa_mask,
1214
error(0, errno, "sigprocmask");
1215
exitstatus = EX_OSERR;
965
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
967
perror("sigprocmask");
968
exitstatus = EXIT_FAILURE;
972
/* We are done modifying process list, so unblock signal */
973
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
976
perror("sigprocmask");
977
exitstatus = EXIT_FAILURE;
981
if(plugin_list == NULL){
1219
985
plugin *next_plugin = proc->next;
1220
986
free_plugin(proc);
1221
987
proc = next_plugin;
1223
/* We are done modifying process list, so unblock signal */
1224
ret = (int)(TEMP_FAILURE_RETRY
1225
(sigprocmask(SIG_UNBLOCK,
1226
&sigchld_action.sa_mask, NULL)));
1228
error(0, errno, "sigprocmask");
1229
exitstatus = EX_OSERR;
1233
if(plugin_list == NULL){
1240
991
/* This process exited nicely, so print its buffer */
1242
993
bool bret = print_out_password(proc->buffer,
1243
994
proc->buffer_length);
1245
error(0, errno, "print_out_password");
1246
exitstatus = EX_IOERR;
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1251
1002
/* This process has not completed. Does it have any output? */
1252
#if defined (__GNUC__) and defined (__GLIBC__)
1253
#if not __GLIBC_PREREQ(2, 16)
1254
#pragma GCC diagnostic push
1255
#pragma GCC diagnostic ignored "-Wsign-conversion"
1258
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1264
#if defined (__GNUC__) and defined (__GLIBC__)
1265
#if not __GLIBC_PREREQ(2, 16)
1266
#pragma GCC diagnostic pop
1003
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1269
1004
/* This process had nothing to say at this time */
1270
1005
proc = proc->next;
1273
1008
/* Before reading, make the process' data buffer large enough */
1274
1009
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1275
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1276
+ (size_t) BUFFER_SIZE);
1277
if(new_buffer == NULL){
1278
error(0, errno, "malloc");
1279
exitstatus = EX_OSERR;
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1011
+ (size_t) BUFFER_SIZE);
1012
if (proc->buffer == NULL){
1014
exitstatus = EXIT_FAILURE;
1282
proc->buffer = new_buffer;
1283
1017
proc->buffer_size += BUFFER_SIZE;
1285
1019
/* Read from the process */
1286
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1288
+ proc->buffer_length,
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1291
1023
/* Read error from this process; ignore the error */
1292
1024
proc = proc->next;
1297
1029
proc->eof = true;
1299
proc->buffer_length += (size_t) sret;
1031
proc->buffer_length += (size_t) ret;
1307
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1308
and exitstatus != EX_OK)){
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1309
1040
/* Fallback if all plugins failed, none are found or an error