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, */
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68
#define BUFFER_SIZE 256
100
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or if none is found, creates a new one */
101
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static plugin *getplugin(char *name){
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/* 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))){
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/* Create a new plugin */
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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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if(name != NULL){
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copy_name = strdup(name);
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if(copy_name == NULL){
123
*new_plugin = (plugin){ .name = copy_name,
126
.next = plugin_list };
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*new_plugin = (plugin) { .name = copy_name,
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.next = plugin_list };
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new_plugin->argv = malloc(sizeof(char *) * 2);
129
if(new_plugin->argv == NULL){
127
if (new_plugin->argv == NULL){
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129
free(new_plugin);
380
error_t parse_opt(int key, char *arg, __attribute__((unused))
381
struct argp_state *state){
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
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case 'g': /* --global-options */
386
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while((p = strsep(&arg, ",")) != NULL){
387
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if(p[0] == '\0'){
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463
/* This is already done by parse_opt_config_file() */
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465
case 130: /* --userid */
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);
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,
480
473
case 131: /* --groupid */
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);
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",
490
481
case 132: /* --debug */
513
504
/* This option parser is the same as parse_opt() above, except it
514
505
ignores everything but the --config-file option. */
515
error_t parse_opt_config_file(int key, char *arg,
516
__attribute__((unused))
517
struct argp_state *state){
506
error_t parse_opt_config_file (int key, char *arg,
507
__attribute__((unused))
508
struct argp_state *state) {
519
510
case 'g': /* --global-options */
520
511
case 'G': /* --global-env */
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512
case 'o': /* --options-for */
551
542
/* Parse using parse_opt_config_file() in order to get the custom
552
543
config file location, if any. */
553
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
554
if(ret == ARGP_ERR_UNKNOWN){
544
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
545
if (ret == ARGP_ERR_UNKNOWN){
555
546
fprintf(stderr, "Unknown error while parsing arguments\n");
556
547
exitstatus = EXIT_FAILURE;
623
614
/* Check for harmful errors and go to fallback. Other errors might
624
615
not affect opening plugins */
625
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
616
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
627
618
exitstatus = EXIT_FAILURE;
631
622
/* If there was any arguments from configuration file,
632
623
pass them to parser as command arguments */
633
624
if(custom_argv != NULL){
634
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
636
if(ret == ARGP_ERR_UNKNOWN){
625
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
627
if (ret == ARGP_ERR_UNKNOWN){
637
628
fprintf(stderr, "Unknown error while parsing arguments\n");
638
629
exitstatus = EXIT_FAILURE;
643
634
/* Parse actual command line arguments, to let them override the
645
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
646
if(ret == ARGP_ERR_UNKNOWN){
636
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
637
if (ret == ARGP_ERR_UNKNOWN){
647
638
fprintf(stderr, "Unknown error while parsing arguments\n");
648
639
exitstatus = EXIT_FAILURE;
656
647
for(char **a = p->argv; *a != NULL; a++){
657
648
fprintf(stderr, "\tArg: %s\n", *a);
659
fprintf(stderr, "...and %d environment variables\n", p->envc);
650
fprintf(stderr, "...and %u environment variables\n", p->envc);
660
651
for(char **a = p->environ; *a != NULL; a++){
661
652
fprintf(stderr, "\t%s\n", *a);
774
765
ret = stat(filename, &st);
781
772
/* Ignore non-executable files */
782
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)){
784
775
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
785
776
" with bad type or mode\n", filename);
853
844
/* Block SIGCHLD until process is safely in process list */
854
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
845
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
856
847
perror("sigprocmask");
857
848
exitstatus = EXIT_FAILURE;
905
896
close(pipefd[1]); /* Close unused write end of pipe */
907
898
plugin *new_plugin = getplugin(dirst->d_name);
908
if(new_plugin == NULL){
899
if (new_plugin == NULL){
909
900
perror("getplugin");
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
901
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
912
903
perror("sigprocmask");
921
912
/* Unblock SIGCHLD so signal handler can be run if this process
922
913
has already completed */
923
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
914
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
925
916
perror("sigprocmask");
926
917
exitstatus = EXIT_FAILURE;
961
952
from one of them */
962
953
for(plugin *proc = plugin_list; proc != NULL;){
963
954
/* Is this process completely done? */
964
if(proc->completed and proc->eof){
955
if(proc->eof and proc->completed){
965
956
/* Only accept the plugin output if it exited cleanly */
966
957
if(not WIFEXITED(proc->status)
967
958
or WEXITSTATUS(proc->status) != 0){
971
962
if(WIFEXITED(proc->status)){
972
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
973
" status %d\n", proc->name,
974
(intmax_t) (proc->pid),
963
fprintf(stderr, "Plugin %u exited with status %d\n",
964
(unsigned int) (proc->pid),
975
965
WEXITSTATUS(proc->status));
976
} else if(WIFSIGNALED(proc->status)){
977
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
978
" signal %d\n", proc->name,
979
(intmax_t) (proc->pid),
966
} else if(WIFSIGNALED(proc->status)) {
967
fprintf(stderr, "Plugin %u killed by signal %d\n",
968
(unsigned int) (proc->pid),
980
969
WTERMSIG(proc->status));
981
970
} else if(WCOREDUMP(proc->status)){
982
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
983
" core\n", proc->name, (intmax_t) (proc->pid));
971
fprintf(stderr, "Plugin %u dumped core\n",
972
(unsigned int) (proc->pid));
1000
989
proc = next_plugin;
1002
991
/* We are done modifying process list, so unblock signal */
1003
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
992
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1006
995
perror("sigprocmask");
1007
996
exitstatus = EXIT_FAILURE;
1036
1025
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1037
1026
proc->buffer = realloc(proc->buffer, proc->buffer_size
1038
1027
+ (size_t) BUFFER_SIZE);
1039
if(proc->buffer == NULL){
1028
if (proc->buffer == NULL){
1040
1029
perror("malloc");
1041
1030
exitstatus = EXIT_FAILURE;