25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
27
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
30
#include <stdbool.h> /* bool, true, false */
31
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
38
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
39
FD_SET(), FD_ISSET(), FD_CLR */
40
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
43
42
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
43
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
45
readdir(), closedir(), dirfd() */
47
46
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
47
fcntl(), setuid(), setgid(),
402
375
.doc = "Group ID the plugins will run as", .group = 3 },
403
376
{ .name = "debug", .key = 132,
404
377
.doc = "Debug mode", .group = 4 },
406
* These reproduce what we would get without ARGP_NO_HELP
408
{ .name = "help", .key = '?',
409
.doc = "Give this help list", .group = -1 },
410
{ .name = "usage", .key = -3,
411
.doc = "Give a short usage message", .group = -1 },
412
{ .name = "version", .key = 'V',
413
.doc = "Print program version", .group = -1 },
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
381
error_t parse_opt(int key, char *arg, __attribute__((unused))
382
struct argp_state *state){
422
385
case 'g': /* --global-options */
424
387
char *plugin_option;
425
388
while((plugin_option = strsep(&arg, ",")) != NULL){
389
if(plugin_option[0] == '\0'){
426
392
if(not add_argument(getplugin(NULL), plugin_option)){
393
perror("add_argument");
394
return ARGP_ERR_UNKNOWN;
432
399
case 'G': /* --global-env */
433
add_environment(getplugin(NULL), arg, true);
403
if(not add_environment(getplugin(NULL), arg, true)){
404
perror("add_environment");
435
407
case 'o': /* --options-for */
437
char *option_list = strchr(arg, ':');
438
if(option_list == NULL){
439
argp_error(state, "No colon in \"%s\"", arg);
446
argp_error(state, "Empty plugin name");
451
while((option = strsep(&option_list, ",")) != NULL){
452
if(not add_argument(getplugin(arg), option)){
409
char *plugin_name = strsep(&arg, ":");
410
if(plugin_name[0] == '\0'){
414
while((plugin_option = strsep(&arg, ",")) != NULL){
415
if(not add_argument(getplugin(plugin_name), plugin_option)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
458
422
case 'E': /* --env-for */
460
427
char *envdef = strchr(arg, ':');
461
428
if(envdef == NULL){
462
argp_error(state, "No colon in \"%s\"", arg);
469
argp_error(state, "Empty plugin name");
432
if(not add_environment(getplugin(arg), envdef+1, true)){
433
perror("add_environment");
473
add_environment(getplugin(arg), envdef, true);
476
437
case 'd': /* --disable */
478
439
plugin *p = getplugin(arg);
441
return ARGP_ERR_UNKNOWN;
484
446
case 'e': /* --enable */
486
448
plugin *p = getplugin(arg);
450
return ARGP_ERR_UNKNOWN;
492
455
case 128: /* --plugin-dir */
494
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
496
462
case 129: /* --config-file */
497
463
/* This is already done by parse_opt_config_file() */
499
465
case 130: /* --userid */
500
467
tmpmax = strtoimax(arg, &tmp, 10);
501
468
if(errno != 0 or tmp == arg or *tmp != '\0'
502
469
or tmpmax != (uid_t)tmpmax){
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
470
fprintf(stderr, "Bad user ID number: \"%s\", using %"
471
PRIdMAX "\n", arg, (intmax_t)uid);
509
476
case 131: /* --groupid */
510
478
tmpmax = strtoimax(arg, &tmp, 10);
511
479
if(errno != 0 or tmp == arg or *tmp != '\0'
512
480
or tmpmax != (gid_t)tmpmax){
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
481
fprintf(stderr, "Bad group ID number: \"%s\", using %"
482
PRIdMAX "\n", arg, (intmax_t)gid);
519
487
case 132: /* --debug */
523
* These reproduce what we would get without ARGP_NO_HELP
525
case '?': /* --help */
526
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
527
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
528
case -3: /* --usage */
529
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
530
argp_state_help(state, state->out_stream,
531
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
532
case 'V': /* --version */
533
fprintf(state->out_stream, "%s\n", argp_program_version);
537
491
* When adding more options before this line, remember to also add a
538
492
* "case" to the "parse_opt_config_file" function below.
660
607
* ((unsigned int) custom_argc + 1));
661
608
if(custom_argv == NULL){
662
609
perror("realloc");
663
exitstatus = EX_OSERR;
610
exitstatus = EXIT_FAILURE;
667
614
custom_argv[custom_argc-1] = new_arg;
668
custom_argv[custom_argc] = NULL;
615
custom_argv[custom_argc] = NULL;
672
ret = fclose(conffp);
673
} while(ret == EOF and errno == EINTR);
676
exitstatus = EX_IOERR;
681
620
/* Check for harmful errors and go to fallback. Other errors might
682
621
not affect opening plugins */
683
622
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
685
exitstatus = EX_OSERR;
624
exitstatus = EXIT_FAILURE;
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
628
/* If there was any arguments from configuration file,
629
pass them to parser as command arguments */
691
630
if(custom_argv != NULL){
692
ret = argp_parse(&argp, custom_argc, custom_argv,
693
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
701
perror("argp_parse");
702
exitstatus = EX_OSERR;
705
exitstatus = EX_CONFIG;
631
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
633
if(ret == ARGP_ERR_UNKNOWN){
634
fprintf(stderr, "Unknown error while parsing arguments\n");
635
exitstatus = EXIT_FAILURE;
710
640
/* Parse actual command line arguments, to let them override the
712
ret = argp_parse(&argp, argc, argv,
713
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
721
perror("argp_parse");
722
exitstatus = EX_OSERR;
725
exitstatus = EX_USAGE;
642
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
643
if(ret == ARGP_ERR_UNKNOWN){
644
fprintf(stderr, "Unknown error while parsing arguments\n");
645
exitstatus = EXIT_FAILURE;
750
670
perror("setuid");
753
/* Open plugin directory with close_on_exec flag */
673
if(plugindir == NULL){
676
dir = opendir(plugindir);
680
perror("Could not open plugin dir");
681
exitstatus = EXIT_FAILURE;
685
/* Set the FD_CLOEXEC flag on the directory, if possible */
756
if(plugindir == NULL){
757
dir_fd = open(PDIR, O_RDONLY |
760
#else /* not O_CLOEXEC */
762
#endif /* not O_CLOEXEC */
765
dir_fd = open(plugindir, O_RDONLY |
768
#else /* not O_CLOEXEC */
770
#endif /* not O_CLOEXEC */
774
perror("Could not open plugin dir");
775
exitstatus = EX_UNAVAILABLE;
780
/* Set the FD_CLOEXEC flag on the directory */
781
ret = set_cloexec_flag(dir_fd);
783
perror("set_cloexec_flag");
784
TEMP_FAILURE_RETRY(close(dir_fd));
785
exitstatus = EX_OSERR;
788
#endif /* O_CLOEXEC */
790
dir = fdopendir(dir_fd);
792
perror("Could not open plugin dir");
793
TEMP_FAILURE_RETRY(close(dir_fd));
794
exitstatus = EX_OSERR;
687
int dir_fd = dirfd(dir);
689
ret = set_cloexec_flag(dir_fd);
691
perror("set_cloexec_flag");
692
exitstatus = EXIT_FAILURE;
864
761
if(plugindir == NULL){
865
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
762
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
868
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
764
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
873
767
perror("asprintf");
877
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
771
ret = stat(filename, &st);
884
778
/* Ignore non-executable files */
885
if(not S_ISREG(st.st_mode)
886
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
779
if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
888
781
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
889
782
" with bad type or mode\n", filename);
938
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
941
exitstatus = EX_OSERR;
834
exitstatus = EXIT_FAILURE;
944
837
/* Ask OS to automatic close the pipe on exec */
945
838
ret = set_cloexec_flag(pipefd[0]);
947
840
perror("set_cloexec_flag");
948
exitstatus = EX_OSERR;
841
exitstatus = EXIT_FAILURE;
951
844
ret = set_cloexec_flag(pipefd[1]);
953
846
perror("set_cloexec_flag");
954
exitstatus = EX_OSERR;
847
exitstatus = EXIT_FAILURE;
957
850
/* Block SIGCHLD until process is safely in process list */
958
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
959
&sigchld_action.sa_mask,
851
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
962
853
perror("sigprocmask");
963
exitstatus = EX_OSERR;
854
exitstatus = EXIT_FAILURE;
966
857
/* Starting a new process to be watched */
970
} while(pid == -1 and errno == EINTR);
973
exitstatus = EX_OSERR;
861
exitstatus = EXIT_FAILURE;