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, */
69
68
#define BUFFER_SIZE 256
100
99
or if none is found, creates a new one */
101
100
static plugin *getplugin(char *name){
102
101
/* Check for exiting plugin with that name */
103
for(plugin *p = plugin_list; p != NULL; p = p->next){
105
or (p->name and name and (strcmp(p->name, name) == 0))){
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))){
109
108
/* Create a new plugin */
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109
plugin *new_plugin = malloc(sizeof(plugin));
111
if(new_plugin == NULL){
110
if (new_plugin == NULL){
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113
char *copy_name = NULL;
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114
if(name != NULL){
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115
copy_name = strdup(name);
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116
if(copy_name == NULL){
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
381
378
case 'g': /* --global-options */
384
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while((p = strsep(&arg, ",")) != NULL){
385
382
if(p[0] == '\0'){
466
463
/* This is already done by parse_opt_config_file() */
468
465
case 130: /* --userid */
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);
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%ud", &uid);
469
fprintf(stderr, "Bad user ID number: \"%s\", using %ud\n",
478
473
case 131: /* --groupid */
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);
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%ud", &gid);
477
fprintf(stderr, "Bad group ID number: \"%s\", using %ud\n",
488
481
case 132: /* --debug */
511
504
/* This option parser is the same as parse_opt() above, except it
512
505
ignores everything but the --config-file option. */
513
error_t parse_opt_config_file(int key, char *arg,
514
__attribute__((unused))
515
struct argp_state *state) {
506
error_t parse_opt_config_file (int key, char *arg,
507
__attribute__((unused))
508
struct argp_state *state) {
517
510
case 'g': /* --global-options */
518
511
case 'G': /* --global-env */
519
512
case 'o': /* --options-for */
547
540
.doc = "Mandos plugin runner -- Run plugins" };
549
/* Parse using parse_opt_config_file() in order to get the custom
542
/* Parse using the parse_opt_config_file in order to get the custom
550
543
config file location, if any. */
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
544
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if (ret == ARGP_ERR_UNKNOWN){
553
546
fprintf(stderr, "Unknown error while parsing arguments\n");
554
547
exitstatus = EXIT_FAILURE;
621
614
/* Check for harmful errors and go to fallback. Other errors might
622
615
not affect opening plugins */
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
625
618
exitstatus = EXIT_FAILURE;
629
622
/* If there was any arguments from configuration file,
630
623
pass them to parser as command arguments */
631
624
if(custom_argv != NULL){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
if(ret == ARGP_ERR_UNKNOWN){
625
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
627
if (ret == ARGP_ERR_UNKNOWN){
635
628
fprintf(stderr, "Unknown error while parsing arguments\n");
636
629
exitstatus = EXIT_FAILURE;
641
634
/* Parse actual command line arguments, to let them override the
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
636
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if (ret == ARGP_ERR_UNKNOWN){
645
638
fprintf(stderr, "Unknown error while parsing arguments\n");
646
639
exitstatus = EXIT_FAILURE;
654
647
for(char **a = p->argv; *a != NULL; a++){
655
648
fprintf(stderr, "\tArg: %s\n", *a);
657
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
658
651
for(char **a = p->environ; *a != NULL; a++){
659
652
fprintf(stderr, "\t%s\n", *a);
772
765
ret = stat(filename, &st);
779
772
/* Ignore non-executable files */
780
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
773
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
782
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
783
776
" with bad type or mode\n", filename);
851
844
/* Block SIGCHLD until process is safely in process list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
854
847
perror("sigprocmask");
855
848
exitstatus = EXIT_FAILURE;
903
896
close(pipefd[1]); /* Close unused write end of pipe */
905
898
plugin *new_plugin = getplugin(dirst->d_name);
906
if(new_plugin == NULL){
899
if (new_plugin == NULL){
907
900
perror("getplugin");
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
910
903
perror("sigprocmask");
919
912
/* Unblock SIGCHLD so signal handler can be run if this process
920
913
has already completed */
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
923
916
perror("sigprocmask");
924
917
exitstatus = EXIT_FAILURE;
969
962
if(WIFEXITED(proc->status)){
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
972
965
WEXITSTATUS(proc->status));
973
966
} else if(WIFSIGNALED(proc->status)) {
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
976
969
WTERMSIG(proc->status));
977
970
} else if(WCOREDUMP(proc->status)){
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %d dumped core\n",
972
(unsigned int) (proc->pid));
996
989
proc = next_plugin;
998
991
/* We are done modifying process list, so unblock signal */
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
992
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1002
995
perror("sigprocmask");
1003
996
exitstatus = EXIT_FAILURE;
1032
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1033
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1034
1027
+ (size_t) BUFFER_SIZE);
1035
if(proc->buffer == NULL){
1028
if (proc->buffer == NULL){
1036
1029
perror("malloc");
1037
1030
exitstatus = EXIT_FAILURE;