18
19
* along with this program. If not, see
19
20
* <http://www.gnu.org/licenses/>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
22
* Contact the authors at <mandos@recompile.se>.
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
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(),
41
WEXITSTATUS(), WTERMSIG(),
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
67
76
#define BUFFER_SIZE 256
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
75
84
typedef struct plugin{
76
85
char *name; /* can be NULL or any plugin name */
97
106
/* Gets an existing plugin based on name,
98
107
or if none is found, creates a new one */
99
108
static plugin *getplugin(char *name){
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))){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
or (p->name and name and (strcmp(p->name, name) == 0))){
107
116
/* Create a new plugin */
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
112
124
char *copy_name = NULL;
113
125
if(name != NULL){
114
copy_name = strdup(name);
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
115
129
if(copy_name == NULL){
120
*new_plugin = (plugin) { .name = copy_name,
123
.next = plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
140
.next = plugin_list };
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
128
148
free(new_plugin);
131
152
new_plugin->argv[0] = copy_name;
132
153
new_plugin->argv[1] = NULL;
134
new_plugin->environ = malloc(sizeof(char *));
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
135
158
if(new_plugin->environ == NULL){
137
161
free(new_plugin->argv);
138
162
free(new_plugin);
141
166
new_plugin->environ[0] = NULL;
367
411
.doc = "Group ID the plugins will run as", .group = 3 },
368
412
{ .name = "debug", .key = 132,
369
413
.doc = "Debug mode", .group = 4 },
415
* These reproduce what we would get without ARGP_NO_HELP
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
376
432
case 'g': /* --global-options */
379
while((p = strsep(&arg, ",")) != NULL){
383
if(not add_argument(getplugin(NULL), p)){
384
perror("add_argument");
385
return ARGP_ERR_UNKNOWN;
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
390
442
case 'G': /* --global-env */
394
if(not add_environment(getplugin(NULL), arg, true)){
395
perror("add_environment");
443
add_environment(getplugin(NULL), arg, true);
398
445
case 'o': /* --options-for */
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;
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
456
argp_error(state, "Empty plugin name");
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
420
468
case 'E': /* --env-for */
425
470
char *envdef = strchr(arg, ':');
426
471
if(envdef == NULL){
472
argp_error(state, "No colon in \"%s\"", arg);
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
479
argp_error(state, "Empty plugin name");
483
add_environment(getplugin(arg), envdef, true);
435
486
case 'd': /* --disable */
437
488
plugin *p = getplugin(arg);
439
return ARGP_ERR_UNKNOWN;
444
494
case 'e': /* --enable */
446
496
plugin *p = getplugin(arg);
448
return ARGP_ERR_UNKNOWN;
453
502
case 128: /* --plugin-dir */
455
504
plugindir = strdup(arg);
456
if(plugindir == NULL){
460
506
case 129: /* --config-file */
461
507
/* This is already done by parse_opt_config_file() */
463
509
case 130: /* --userid */
464
uid = (uid_t)strtol(arg, NULL, 10);
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
466
519
case 131: /* --groupid */
467
gid = (gid_t)strtol(arg, NULL, 10);
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
469
529
case 132: /* --debug */
533
* These reproduce what we would get without ARGP_NO_HELP
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
472
550
case ARGP_KEY_ARG:
473
551
/* Cryptsetup always passes an argument, which is an empty
474
552
string if "none" was specified in /etc/crypttab. So if
475
553
argument was empty, we ignore it silently. */
477
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
483
558
return ARGP_ERR_UNKNOWN;
560
return errno; /* Set to 0 at start */
488
563
/* This option parser is the same as parse_opt() above, except it
489
564
ignores everything but the --config-file option. */
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
494
570
case 'g': /* --global-options */
495
571
case 'G': /* --global-env */
496
572
case 'o': /* --options-for */
576
660
new_arg = strdup(p);
577
661
if(new_arg == NULL){
579
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
584
668
custom_argc += 1;
585
custom_argv = realloc(custom_argv, sizeof(char *)
586
* ((unsigned int) custom_argc + 1));
587
if(custom_argv == NULL){
589
exitstatus = EXIT_FAILURE;
670
char **new_argv = realloc(custom_argv, sizeof(char *)
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
680
custom_argv = new_argv;
593
683
custom_argv[custom_argc-1] = new_arg;
594
custom_argv[custom_argc] = NULL;
684
custom_argv[custom_argc] = NULL;
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
599
697
/* Check for harmful errors and go to fallback. Other errors might
600
698
not affect opening plugins */
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
607
/* If there was any arguments from configuration file,
608
pass them to parser as command arguments */
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
609
707
if(custom_argv != NULL){
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;
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
721
exitstatus = EX_CONFIG;
619
726
/* Parse actual command line arguments, to let them override the
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;
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
741
exitstatus = EX_USAGE;
632
749
for(char **a = p->argv; *a != NULL; a++){
633
750
fprintf(stderr, "\tArg: %s\n", *a);
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
636
753
for(char **a = p->environ; *a != NULL; a++){
637
754
fprintf(stderr, "\t%s\n", *a);
642
/* Strip permissions down to nobody */
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
768
error(0, errno, "fstat");
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
773
error(0, errno, "fchown");
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
781
/* Lower permissions */
784
error(0, errno, "setgid");
643
786
ret = setuid(uid);
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 */
788
error(0, errno, "setuid");
791
/* Open plugin directory with close_on_exec flag */
666
int dir_fd = dirfd(dir);
668
ret = set_cloexec_flag(dir_fd);
670
perror("set_cloexec_flag");
671
exitstatus = EXIT_FAILURE;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
798
#else /* not O_CLOEXEC */
800
#endif /* not O_CLOEXEC */
803
dir_fd = open(plugindir, O_RDONLY |
806
#else /* not O_CLOEXEC */
808
#endif /* not O_CLOEXEC */
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
826
#endif /* O_CLOEXEC */
828
dir = fdopendir(dir_fd);
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
800
983
if(p->environ[0] != NULL){
801
984
for(char **e = environ; *e != NULL; e++){
802
985
if(not add_environment(p, *e, false)){
803
perror("add_environment");
986
error(0, errno, "add_environment");
812
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
815
998
/* Ask OS to automatic close the pipe on exec */
816
999
ret = set_cloexec_flag(pipefd[0]);
818
perror("set_cloexec_flag");
819
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
822
1005
ret = set_cloexec_flag(pipefd[1]);
824
perror("set_cloexec_flag");
825
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
828
1011
/* Block SIGCHLD until process is safely in process list */
829
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
831
perror("sigprocmask");
832
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
835
1020
/* Starting a new process to be watched */
1024
} while(pid == -1 and errno == EINTR);
839
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
843
1031
/* this is the child process */
844
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1034
error(0, errno, "sigaction");
849
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
851
perror("sigprocmask");
1039
error(0, errno, "sigprocmask");
855
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1045
error(0, errno, "dup2");
861
1049
if(dirfd(dir) < 0){
866
1054
if(p->environ[0] == NULL){
867
1055
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
872
1060
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
879
1067
/* Parent process */
880
close(pipefd[1]); /* Close unused write end of pipe */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
882
1071
plugin *new_plugin = getplugin(dirst->d_name);
883
if (new_plugin == NULL){
885
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
887
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
889
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
896
1087
/* Unblock SIGCHLD so signal handler can be run if this process
897
1088
has already completed */
898
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
900
perror("sigprocmask");
901
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
905
FD_SET(new_plugin->fd, &rfds_all);
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
907
if (maxfd < new_plugin->fd){
1113
if(maxfd < new_plugin->fd){
908
1114
maxfd = new_plugin->fd;
1118
TEMP_FAILURE_RETRY(closedir(dir));
1120
free_plugin(getplugin(NULL));
916
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
917
1123
if(p->pid != 0){
923
1129
free_plugin_list();
927
1133
/* Main loop while running plugins exist */
928
1134
while(plugin_list){
929
1135
fd_set rfds = rfds_all;
930
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
931
if (select_ret == -1){
933
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
936
1142
/* OK, now either a process completed, or something can be read
937
1143
from one of them */
938
1144
for(plugin *proc = plugin_list; proc != NULL;){
939
1145
/* Is this process completely done? */
940
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
941
1147
/* Only accept the plugin output if it exited cleanly */
942
1148
if(not WIFEXITED(proc->status)
943
1149
or WEXITSTATUS(proc->status) != 0){
944
1150
/* Bad exit by plugin */
947
1153
if(WIFEXITED(proc->status)){
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
950
1157
WEXITSTATUS(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));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
955
1164
} else if(WCOREDUMP(proc->status)){
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
961
1170
/* Remove the plugin */
962
FD_CLR(proc->fd, &rfds_all);
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
964
1186
/* Block signal while modifying process_list */
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){
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1189
&sigchld_action.sa_mask,
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
985
1197
plugin *next_plugin = proc->next;
986
1198
free_plugin(proc);
987
1199
proc = next_plugin;
1201
/* We are done modifying process list, so unblock signal */
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1211
if(plugin_list == NULL){
991
1218
/* This process exited nicely, so print its buffer */
993
1220
bool bret = print_out_password(proc->buffer,
994
1221
proc->buffer_length);
996
perror("print_out_password");
997
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
1002
1229
/* This process has not completed. Does it have any output? */
1003
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
1004
1247
/* This process had nothing to say at this time */
1005
1248
proc = proc->next;
1008
1251
/* Before reading, make the process' data buffer large enough */
1009
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1010
proc->buffer = realloc(proc->buffer, proc->buffer_size
1011
+ (size_t) BUFFER_SIZE);
1012
if (proc->buffer == NULL){
1014
exitstatus = EXIT_FAILURE;
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1260
proc->buffer = new_buffer;
1017
1261
proc->buffer_size += BUFFER_SIZE;
1019
1263
/* Read from the process */
1020
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1266
+ proc->buffer_length,
1023
1269
/* Read error from this process; ignore the error */
1024
1270
proc = proc->next;
1029
1275
proc->eof = true;
1031
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
1039
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
1040
1287
/* Fallback if all plugins failed, none are found or an error