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
100
or if none is found, creates a new one */
100
101
static plugin *getplugin(char *name){
101
102
/* 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
109
/* 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){
115
116
copy_name = strdup(name);
116
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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){
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131
free(new_plugin);
374
error_t parse_opt (int key, char *arg, __attribute__((unused))
375
struct argp_state *state) {
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
377
383
case 'g': /* --global-options */
380
while((p = strsep(&arg, ",")) != NULL){
386
while((plugin_option = strsep(&arg, ",")) != NULL){
387
if(plugin_option[0] == '\0'){
384
if(not add_argument(getplugin(NULL), p)){
390
if(not add_argument(getplugin(NULL), plugin_option)){
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391
perror("add_argument");
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392
return ARGP_ERR_UNKNOWN;
399
405
case 'o': /* --options-for */
401
char *p_name = strsep(&arg, ":");
402
if(p_name[0] == '\0' or arg == NULL){
405
char *opt = strsep(&arg, ":");
406
if(opt[0] == '\0' or opt == NULL){
410
while((p = strsep(&opt, ",")) != NULL){
414
if(not add_argument(getplugin(p_name), p)){
407
char *plugin_name = strsep(&arg, ":");
408
if(plugin_name[0] == '\0'){
412
while((plugin_option = strsep(&arg, ",")) != NULL){
413
if(not add_argument(getplugin(plugin_name), plugin_option)){
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perror("add_argument");
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415
return ARGP_ERR_UNKNOWN;
462
461
/* This is already done by parse_opt_config_file() */
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463
case 130: /* --userid */
465
uid = (uid_t)strtol(arg, NULL, 10);
464
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
465
if(ret < 1 or tmpmax != (uid_t)tmpmax
466
or arg[numchars] != '\0'){
467
fprintf(stderr, "Bad user ID number: \"%s\", using %"
468
PRIdMAX "\n", arg, (intmax_t)uid);
467
473
case 131: /* --groupid */
468
gid = (gid_t)strtol(arg, NULL, 10);
474
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
475
if(ret < 1 or tmpmax != (gid_t)tmpmax
476
or arg[numchars] != '\0'){
477
fprintf(stderr, "Bad group ID number: \"%s\", using %"
478
PRIdMAX "\n", arg, (intmax_t)gid);
470
483
case 132: /* --debug */
487
* When adding more options before this line, remember to also add a
488
* "case" to the "parse_opt_config_file" function below.
473
490
case ARGP_KEY_ARG:
474
491
/* Cryptsetup always passes an argument, which is an empty
475
492
string if "none" was specified in /etc/crypttab. So if
489
506
/* This option parser is the same as parse_opt() above, except it
490
507
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) {
508
error_t parse_opt_config_file(int key, char *arg,
509
__attribute__((unused))
510
struct argp_state *state){
495
512
case 'g': /* --global-options */
496
513
case 'G': /* --global-env */
497
514
case 'o': /* --options-for */
525
542
.doc = "Mandos plugin runner -- Run plugins" };
527
/* Parse using the parse_opt_config_file in order to get the custom
544
/* Parse using parse_opt_config_file() in order to get the custom
528
545
config file location, if any. */
529
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
530
if (ret == ARGP_ERR_UNKNOWN){
546
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
547
if(ret == ARGP_ERR_UNKNOWN){
531
548
fprintf(stderr, "Unknown error while parsing arguments\n");
532
549
exitstatus = EXIT_FAILURE;
546
563
char *org_line = NULL;
547
564
char *p, *arg, *new_arg, *line;
550
566
const char whitespace_delims[] = " \r\t\f\v\n";
551
567
const char comment_delim[] = "#";
600
616
/* Check for harmful errors and go to fallback. Other errors might
601
617
not affect opening plugins */
602
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
618
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
604
620
exitstatus = EXIT_FAILURE;
608
624
/* If there was any arguments from configuration file,
609
625
pass them to parser as command arguments */
610
626
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
613
if (ret == ARGP_ERR_UNKNOWN){
627
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
629
if(ret == ARGP_ERR_UNKNOWN){
614
630
fprintf(stderr, "Unknown error while parsing arguments\n");
615
631
exitstatus = EXIT_FAILURE;
620
636
/* 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){
638
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
639
if(ret == ARGP_ERR_UNKNOWN){
624
640
fprintf(stderr, "Unknown error while parsing arguments\n");
625
641
exitstatus = EXIT_FAILURE;
633
649
for(char **a = p->argv; *a != NULL; a++){
634
650
fprintf(stderr, "\tArg: %s\n", *a);
636
fprintf(stderr, "...and %u environment variables\n", p->envc);
652
fprintf(stderr, "...and %d environment variables\n", p->envc);
637
653
for(char **a = p->environ; *a != NULL; a++){
638
654
fprintf(stderr, "\t%s\n", *a);
751
767
ret = stat(filename, &st);
758
774
/* Ignore non-executable files */
759
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
775
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
761
777
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
762
778
" with bad type or mode\n", filename);
830
846
/* Block SIGCHLD until process is safely in process list */
831
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
847
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
833
849
perror("sigprocmask");
834
850
exitstatus = EXIT_FAILURE;
882
898
close(pipefd[1]); /* Close unused write end of pipe */
884
900
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
901
if(new_plugin == NULL){
886
902
perror("getplugin");
887
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
903
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
889
905
perror("sigprocmask");
898
914
/* Unblock SIGCHLD so signal handler can be run if this process
899
915
has already completed */
900
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
916
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
902
918
perror("sigprocmask");
903
919
exitstatus = EXIT_FAILURE;
907
923
FD_SET(new_plugin->fd, &rfds_all);
909
if (maxfd < new_plugin->fd){
925
if(maxfd < new_plugin->fd){
910
926
maxfd = new_plugin->fd;
932
free_plugin(getplugin(NULL));
917
934
for(plugin *p = plugin_list; p != NULL; p = p->next){
938
955
from one of them */
939
956
for(plugin *proc = plugin_list; proc != NULL;){
940
957
/* Is this process completely done? */
941
if(proc->eof and proc->completed){
958
if(proc->completed and proc->eof){
942
959
/* Only accept the plugin output if it exited cleanly */
943
960
if(not WIFEXITED(proc->status)
944
961
or WEXITSTATUS(proc->status) != 0){
948
965
if(WIFEXITED(proc->status)){
949
fprintf(stderr, "Plugin %u exited with status %d\n",
950
(unsigned int) (proc->pid),
966
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
967
" status %d\n", proc->name,
968
(intmax_t) (proc->pid),
951
969
WEXITSTATUS(proc->status));
952
} else if(WIFSIGNALED(proc->status)) {
953
fprintf(stderr, "Plugin %u killed by signal %d\n",
954
(unsigned int) (proc->pid),
970
} else if(WIFSIGNALED(proc->status)){
971
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
972
" signal %d\n", proc->name,
973
(intmax_t) (proc->pid),
955
974
WTERMSIG(proc->status));
956
975
} else if(WCOREDUMP(proc->status)){
957
fprintf(stderr, "Plugin %d dumped core\n",
958
(unsigned int) (proc->pid));
976
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
977
" core\n", proc->name, (intmax_t) (proc->pid));
975
994
proc = next_plugin;
977
996
/* We are done modifying process list, so unblock signal */
978
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
997
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
981
1000
perror("sigprocmask");
982
1001
exitstatus = EXIT_FAILURE;
1011
1030
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1012
1031
proc->buffer = realloc(proc->buffer, proc->buffer_size
1013
1032
+ (size_t) BUFFER_SIZE);
1014
if (proc->buffer == NULL){
1033
if(proc->buffer == NULL){
1015
1034
perror("malloc");
1016
1035
exitstatus = EXIT_FAILURE;
1019
1038
proc->buffer_size += BUFFER_SIZE;
1021
1040
/* Read from the process */
1022
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1041
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1025
1044
/* Read error from this process; ignore the error */
1026
1045
proc = proc->next;
1031
1050
proc->eof = true;
1033
proc->buffer_length += (size_t) ret;
1052
proc->buffer_length += (size_t) sret;