64
64
sigprocmask(), SIG_BLOCK, SIGCHLD,
65
65
SIG_UNBLOCK, kill() */
66
66
#include <errno.h> /* errno, EBADF */
67
#include <inttypes.h> /* intmax_t, SCNdMAX, PRIdMAX, */
68
69
#define BUFFER_SIZE 256
99
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or if none is found, creates a new one */
100
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static plugin *getplugin(char *name){
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/* 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))){
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
105
or (p->name and name and (strcmp(p->name, name) == 0))){
108
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/* Create a new plugin */
109
110
plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
111
if(new_plugin == NULL){
113
114
char *copy_name = NULL;
114
115
if(name != NULL){
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116
copy_name = strdup(name);
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if(copy_name == NULL){
121
*new_plugin = (plugin) { .name = copy_name,
124
.next = plugin_list };
123
*new_plugin = (plugin){ .name = copy_name,
126
.next = plugin_list };
126
128
new_plugin->argv = malloc(sizeof(char *) * 2);
127
if (new_plugin->argv == NULL){
129
if(new_plugin->argv == NULL){
129
131
free(new_plugin);
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
378
383
case 'g': /* --global-options */
381
386
while((p = strsep(&arg, ",")) != NULL){
382
387
if(p[0] == '\0'){
463
468
/* This is already done by parse_opt_config_file() */
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470
case 130: /* --userid */
466
uid = (uid_t)strtol(arg, NULL, 10);
471
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
472
if(ret < 1 or tmpmax != (uid_t)tmpmax
473
or arg[numchars] != '\0'){
474
fprintf(stderr, "Bad user ID number: \"%s\", using %"
475
PRIdMAX "\n", arg, (intmax_t)uid);
468
480
case 131: /* --groupid */
469
gid = (gid_t)strtol(arg, NULL, 10);
481
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
482
if(ret < 1 or tmpmax != (gid_t)tmpmax
483
or arg[numchars] != '\0'){
484
fprintf(stderr, "Bad group ID number: \"%s\", using %"
485
PRIdMAX "\n", arg, (intmax_t)gid);
471
490
case 132: /* --debug */
494
* When adding more options before this line, remember to also add a
495
* "case" to the "parse_opt_config_file" function below.
474
497
case ARGP_KEY_ARG:
475
498
/* Cryptsetup always passes an argument, which is an empty
476
499
string if "none" was specified in /etc/crypttab. So if
490
513
/* This option parser is the same as parse_opt() above, except it
491
514
ignores everything but the --config-file option. */
492
error_t parse_opt_config_file (int key, char *arg,
493
__attribute__((unused))
494
struct argp_state *state) {
515
error_t parse_opt_config_file(int key, char *arg,
516
__attribute__((unused))
517
struct argp_state *state){
496
519
case 'g': /* --global-options */
497
520
case 'G': /* --global-env */
498
521
case 'o': /* --options-for */
526
549
.doc = "Mandos plugin runner -- Run plugins" };
528
/* Parse using the parse_opt_config_file in order to get the custom
551
/* Parse using parse_opt_config_file() in order to get the custom
529
552
config file location, if any. */
530
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
531
if (ret == ARGP_ERR_UNKNOWN){
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
532
555
fprintf(stderr, "Unknown error while parsing arguments\n");
533
556
exitstatus = EXIT_FAILURE;
600
623
/* Check for harmful errors and go to fallback. Other errors might
601
624
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
627
exitstatus = EXIT_FAILURE;
608
631
/* If there was any arguments from configuration file,
609
632
pass them to parser as command arguments */
610
633
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
613
if (ret == ARGP_ERR_UNKNOWN){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
636
if(ret == ARGP_ERR_UNKNOWN){
614
637
fprintf(stderr, "Unknown error while parsing arguments\n");
615
638
exitstatus = EXIT_FAILURE;
620
643
/* Parse actual command line arguments, to let them override the
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
624
647
fprintf(stderr, "Unknown error while parsing arguments\n");
625
648
exitstatus = EXIT_FAILURE;
633
656
for(char **a = p->argv; *a != NULL; a++){
634
657
fprintf(stderr, "\tArg: %s\n", *a);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
659
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
660
for(char **a = p->environ; *a != NULL; a++){
638
661
fprintf(stderr, "\t%s\n", *a);
751
774
ret = stat(filename, &st);
758
781
/* Ignore non-executable files */
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
782
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
761
784
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
785
" with bad type or mode\n", filename);
830
853
/* Block SIGCHLD until process is safely in process list */
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
854
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
833
856
perror("sigprocmask");
834
857
exitstatus = EXIT_FAILURE;
882
905
close(pipefd[1]); /* Close unused write end of pipe */
884
907
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
908
if(new_plugin == NULL){
886
909
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
912
perror("sigprocmask");
898
921
/* Unblock SIGCHLD so signal handler can be run if this process
899
922
has already completed */
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
902
925
perror("sigprocmask");
903
926
exitstatus = EXIT_FAILURE;
907
930
FD_SET(new_plugin->fd, &rfds_all);
909
if (maxfd < new_plugin->fd){
932
if(maxfd < new_plugin->fd){
910
933
maxfd = new_plugin->fd;
939
free_plugin(getplugin(NULL));
917
941
for(plugin *p = plugin_list; p != NULL; p = p->next){
938
962
from one of them */
939
963
for(plugin *proc = plugin_list; proc != NULL;){
940
964
/* Is this process completely done? */
941
if(proc->eof and proc->completed){
965
if(proc->completed and proc->eof){
942
966
/* Only accept the plugin output if it exited cleanly */
943
967
if(not WIFEXITED(proc->status)
944
968
or WEXITSTATUS(proc->status) != 0){
948
972
if(WIFEXITED(proc->status)){
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
973
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
974
" status %d\n", proc->name,
975
(intmax_t) (proc->pid),
951
976
WEXITSTATUS(proc->status));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
977
} else if(WIFSIGNALED(proc->status)){
978
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
979
" signal %d\n", proc->name,
980
(intmax_t) (proc->pid),
955
981
WTERMSIG(proc->status));
956
982
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
983
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
984
" core\n", proc->name, (intmax_t) (proc->pid));
975
1001
proc = next_plugin;
977
1003
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1004
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
981
1007
perror("sigprocmask");
982
1008
exitstatus = EXIT_FAILURE;
1011
1037
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1012
1038
proc->buffer = realloc(proc->buffer, proc->buffer_size
1013
1039
+ (size_t) BUFFER_SIZE);
1014
if (proc->buffer == NULL){
1040
if(proc->buffer == NULL){
1015
1041
perror("malloc");
1016
1042
exitstatus = EXIT_FAILURE;