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
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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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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);
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state){
377
381
case 'g': /* --global-options */
380
384
while((p = strsep(&arg, ",")) != NULL){
381
385
if(p[0] == '\0'){
462
466
/* This is already done by parse_opt_config_file() */
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468
case 130: /* --userid */
465
uid = (uid_t)strtol(arg, NULL, 10);
469
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
470
if(ret < 1 or tmpmax != (uid_t)tmpmax
471
or arg[numchars] != '\0'){
472
fprintf(stderr, "Bad user ID number: \"%s\", using %"
473
PRIdMAX "\n", arg, (intmax_t)uid);
467
478
case 131: /* --groupid */
468
gid = (gid_t)strtol(arg, NULL, 10);
479
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
480
if(ret < 1 or tmpmax != (gid_t)tmpmax
481
or arg[numchars] != '\0'){
482
fprintf(stderr, "Bad group ID number: \"%s\", using %"
483
PRIdMAX "\n", arg, (intmax_t)gid);
470
488
case 132: /* --debug */
492
* When adding more options before this line, remember to also add a
493
* "case" to the "parse_opt_config_file" function below.
473
495
case ARGP_KEY_ARG:
474
496
/* Cryptsetup always passes an argument, which is an empty
475
497
string if "none" was specified in /etc/crypttab. So if
489
511
/* This option parser is the same as parse_opt() above, except it
490
512
ignores everything but the --config-file option. */
491
error_t parse_opt_config_file (int key, char *arg,
492
__attribute__((unused))
493
struct argp_state *state) {
513
error_t parse_opt_config_file(int key, char *arg,
514
__attribute__((unused))
515
struct argp_state *state){
495
517
case 'g': /* --global-options */
496
518
case 'G': /* --global-env */
497
519
case 'o': /* --options-for */
525
547
.doc = "Mandos plugin runner -- Run plugins" };
527
/* Parse using the parse_opt_config_file in order to get the custom
549
/* Parse using parse_opt_config_file() in order to get the custom
528
550
config file location, if any. */
529
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
530
if (ret == ARGP_ERR_UNKNOWN){
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
531
553
fprintf(stderr, "Unknown error while parsing arguments\n");
532
554
exitstatus = EXIT_FAILURE;
546
568
char *org_line = NULL;
547
569
char *p, *arg, *new_arg, *line;
550
571
const char whitespace_delims[] = " \r\t\f\v\n";
551
572
const char comment_delim[] = "#";
600
621
/* Check for harmful errors and go to fallback. Other errors might
601
622
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
625
exitstatus = EXIT_FAILURE;
608
629
/* If there was any arguments from configuration file,
609
630
pass them to parser as command arguments */
610
631
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
613
if (ret == ARGP_ERR_UNKNOWN){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
if(ret == ARGP_ERR_UNKNOWN){
614
635
fprintf(stderr, "Unknown error while parsing arguments\n");
615
636
exitstatus = EXIT_FAILURE;
620
641
/* 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){
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
624
645
fprintf(stderr, "Unknown error while parsing arguments\n");
625
646
exitstatus = EXIT_FAILURE;
633
654
for(char **a = p->argv; *a != NULL; a++){
634
655
fprintf(stderr, "\tArg: %s\n", *a);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
657
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
658
for(char **a = p->environ; *a != NULL; a++){
638
659
fprintf(stderr, "\t%s\n", *a);
751
772
ret = stat(filename, &st);
758
779
/* Ignore non-executable files */
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
761
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
783
" with bad type or mode\n", filename);
830
851
/* Block SIGCHLD until process is safely in process list */
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
833
854
perror("sigprocmask");
834
855
exitstatus = EXIT_FAILURE;
882
903
close(pipefd[1]); /* Close unused write end of pipe */
884
905
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
906
if(new_plugin == NULL){
886
907
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
910
perror("sigprocmask");
898
919
/* Unblock SIGCHLD so signal handler can be run if this process
899
920
has already completed */
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
902
923
perror("sigprocmask");
903
924
exitstatus = EXIT_FAILURE;
938
959
from one of them */
939
960
for(plugin *proc = plugin_list; proc != NULL;){
940
961
/* Is this process completely done? */
941
if(proc->eof and proc->completed){
962
if(proc->completed and proc->eof){
942
963
/* Only accept the plugin output if it exited cleanly */
943
964
if(not WIFEXITED(proc->status)
944
965
or WEXITSTATUS(proc->status) != 0){
948
969
if(WIFEXITED(proc->status)){
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
951
972
WEXITSTATUS(proc->status));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
973
} else if(WIFSIGNALED(proc->status)){
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
955
976
WTERMSIG(proc->status));
956
977
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
975
996
proc = next_plugin;
977
998
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
981
1002
perror("sigprocmask");
982
1003
exitstatus = EXIT_FAILURE;
1011
1032
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1012
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1013
1034
+ (size_t) BUFFER_SIZE);
1014
if (proc->buffer == NULL){
1035
if(proc->buffer == NULL){
1015
1036
perror("malloc");
1016
1037
exitstatus = EXIT_FAILURE;
1019
1040
proc->buffer_size += BUFFER_SIZE;
1021
1042
/* Read from the process */
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1043
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1025
1046
/* Read error from this process; ignore the error */
1026
1047
proc = proc->next;
1031
1052
proc->eof = true;
1033
proc->buffer_length += (size_t) ret;
1054
proc->buffer_length += (size_t) sret;