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))){
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/* Create a new plugin */
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plugin *new_plugin = malloc(sizeof(plugin));
110
if (new_plugin == NULL){
111
if(new_plugin == NULL){
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114
char *copy_name = NULL;
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if(name != NULL){
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copy_name = strdup(name);
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if(copy_name == NULL){
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
378
error_t parse_opt(int key, char *arg, __attribute__((unused))
379
struct argp_state *state) {
378
381
case 'g': /* --global-options */
381
384
while((p = strsep(&arg, ",")) != NULL){
382
385
if(p[0] == '\0'){
463
466
/* This is already done by parse_opt_config_file() */
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468
case 130: /* --userid */
466
/* In the GNU C library, uid_t is always unsigned int */
467
ret = sscanf(arg, "%u", &uid);
469
fprintf(stderr, "Bad user ID number: \"%s\", using %u\n", arg,
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);
473
478
case 131: /* --groupid */
474
/* In the GNU C library, gid_t is always unsigned int */
475
ret = sscanf(arg, "%u", &gid);
477
fprintf(stderr, "Bad group ID number: \"%s\", using %u\n",
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);
481
488
case 132: /* --debug */
504
511
/* This option parser is the same as parse_opt() above, except it
505
512
ignores everything but the --config-file option. */
506
error_t parse_opt_config_file (int key, char *arg,
507
__attribute__((unused))
508
struct argp_state *state) {
513
error_t parse_opt_config_file(int key, char *arg,
514
__attribute__((unused))
515
struct argp_state *state) {
510
517
case 'g': /* --global-options */
511
518
case 'G': /* --global-env */
512
519
case 'o': /* --options-for */
542
549
/* Parse using parse_opt_config_file() in order to get the custom
543
550
config file location, if any. */
544
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if (ret == ARGP_ERR_UNKNOWN){
551
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
552
if(ret == ARGP_ERR_UNKNOWN){
546
553
fprintf(stderr, "Unknown error while parsing arguments\n");
547
554
exitstatus = EXIT_FAILURE;
614
621
/* Check for harmful errors and go to fallback. Other errors might
615
622
not affect opening plugins */
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
623
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
618
625
exitstatus = EXIT_FAILURE;
622
629
/* If there was any arguments from configuration file,
623
630
pass them to parser as command arguments */
624
631
if(custom_argv != NULL){
625
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
627
if (ret == ARGP_ERR_UNKNOWN){
632
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
634
if(ret == ARGP_ERR_UNKNOWN){
628
635
fprintf(stderr, "Unknown error while parsing arguments\n");
629
636
exitstatus = EXIT_FAILURE;
634
641
/* Parse actual command line arguments, to let them override the
636
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if (ret == ARGP_ERR_UNKNOWN){
643
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
644
if(ret == ARGP_ERR_UNKNOWN){
638
645
fprintf(stderr, "Unknown error while parsing arguments\n");
639
646
exitstatus = EXIT_FAILURE;
647
654
for(char **a = p->argv; *a != NULL; a++){
648
655
fprintf(stderr, "\tArg: %s\n", *a);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
657
fprintf(stderr, "...and %d environment variables\n", p->envc);
651
658
for(char **a = p->environ; *a != NULL; a++){
652
659
fprintf(stderr, "\t%s\n", *a);
765
772
ret = stat(filename, &st);
772
779
/* Ignore non-executable files */
773
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)){
775
782
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
776
783
" with bad type or mode\n", filename);
844
851
/* Block SIGCHLD until process is safely in process list */
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
847
854
perror("sigprocmask");
848
855
exitstatus = EXIT_FAILURE;
896
903
close(pipefd[1]); /* Close unused write end of pipe */
898
905
plugin *new_plugin = getplugin(dirst->d_name);
899
if (new_plugin == NULL){
906
if(new_plugin == NULL){
900
907
perror("getplugin");
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
908
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
903
910
perror("sigprocmask");
912
919
/* Unblock SIGCHLD so signal handler can be run if this process
913
920
has already completed */
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
921
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
916
923
perror("sigprocmask");
917
924
exitstatus = EXIT_FAILURE;
962
969
if(WIFEXITED(proc->status)){
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
970
fprintf(stderr, "Plugin %" PRIdMAX " exited with status"
971
" %d\n", (intmax_t) (proc->pid),
965
972
WEXITSTATUS(proc->status));
966
973
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
974
fprintf(stderr, "Plugin %" PRIdMAX " killed by signal"
975
" %d\n", (intmax_t) (proc->pid),
969
976
WTERMSIG(proc->status));
970
977
} else if(WCOREDUMP(proc->status)){
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
978
fprintf(stderr, "Plugin %" PRIdMAX " dumped core\n",
979
(intmax_t) (proc->pid));
989
996
proc = next_plugin;
991
998
/* We are done modifying process list, so unblock signal */
992
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
999
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
995
1002
perror("sigprocmask");
996
1003
exitstatus = EXIT_FAILURE;
1025
1032
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1026
1033
proc->buffer = realloc(proc->buffer, proc->buffer_size
1027
1034
+ (size_t) BUFFER_SIZE);
1028
if (proc->buffer == NULL){
1035
if(proc->buffer == NULL){
1029
1036
perror("malloc");
1030
1037
exitstatus = EXIT_FAILURE;