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_FAILURE,
29
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
30
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
31
#include <stdio.h> /* fileno(), fprintf(),
32
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
34
34
stat, waitpid(), WIFEXITED(),
35
35
WEXITSTATUS(), wait(), pid_t,
36
36
uid_t, gid_t, getuid(), getgid(),
394
404
.doc = "Group ID the plugins will run as", .group = 3 },
395
405
{ .name = "debug", .key = 132,
396
406
.doc = "Debug mode", .group = 4 },
408
* These reproduce what we would get without ARGP_NO_HELP
410
{ .name = "help", .key = '?',
411
.doc = "Give this help list", .group = -1 },
412
{ .name = "usage", .key = -3,
413
.doc = "Give a short usage message", .group = -1 },
414
{ .name = "version", .key = 'V',
415
.doc = "Print program version", .group = -1 },
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
405
424
case 'g': /* --global-options */
407
426
char *plugin_option;
408
427
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
412
428
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
419
434
case 'G': /* --global-env */
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
435
add_environment(getplugin(NULL), arg, true);
427
437
case 'o': /* --options-for */
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
439
char *option_list = strchr(arg, ':');
440
if(option_list == NULL){
441
argp_error(state, "No colon in \"%s\"", arg);
448
argp_error(state, "Empty plugin name");
453
while((option = strsep(&option_list, ",")) != NULL){
454
if(not add_argument(getplugin(arg), option)){
442
460
case 'E': /* --env-for */
447
462
char *envdef = strchr(arg, ':');
448
463
if(envdef == NULL){
464
argp_error(state, "No colon in \"%s\"", arg);
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
471
argp_error(state, "Empty plugin name");
475
add_environment(getplugin(arg), envdef, true);
457
478
case 'd': /* --disable */
459
480
plugin *p = getplugin(arg);
461
return ARGP_ERR_UNKNOWN;
466
486
case 'e': /* --enable */
468
488
plugin *p = getplugin(arg);
470
return ARGP_ERR_UNKNOWN;
475
494
case 128: /* --plugin-dir */
477
496
plugindir = strdup(arg);
478
if(plugindir == NULL){
482
498
case 129: /* --config-file */
483
499
/* This is already done by parse_opt_config_file() */
485
501
case 130: /* --userid */
487
502
tmpmax = strtoimax(arg, &tmp, 10);
488
503
if(errno != 0 or tmp == arg or *tmp != '\0'
489
504
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
505
argp_error(state, "Bad user ID number: \"%s\", using %"
506
PRIdMAX, arg, (intmax_t)uid);
496
511
case 131: /* --groupid */
498
512
tmpmax = strtoimax(arg, &tmp, 10);
499
513
if(errno != 0 or tmp == arg or *tmp != '\0'
500
514
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
515
argp_error(state, "Bad group ID number: \"%s\", using %"
516
PRIdMAX, arg, (intmax_t)gid);
507
521
case 132: /* --debug */
525
* These reproduce what we would get without ARGP_NO_HELP
527
case '?': /* --help */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
530
case -3: /* --usage */
531
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
532
argp_state_help(state, state->out_stream,
533
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
534
case 'V': /* --version */
535
fprintf(state->out_stream, "%s\n", argp_program_version);
511
539
* When adding more options before this line, remember to also add a
512
540
* "case" to the "parse_opt_config_file" function below.
648
683
/* Check for harmful errors and go to fallback. Other errors might
649
684
not affect opening plugins */
650
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
652
exitstatus = EXIT_FAILURE;
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
658
693
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
661
if(ret == ARGP_ERR_UNKNOWN){
662
fprintf(stderr, "Unknown error while parsing arguments\n");
663
exitstatus = EXIT_FAILURE;
694
ret = argp_parse(&argp, custom_argc, custom_argv,
695
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
703
error(0, errno, "argp_parse");
704
exitstatus = EX_OSERR;
707
exitstatus = EX_CONFIG;
668
712
/* Parse actual command line arguments, to let them override the
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
714
ret = argp_parse(&argp, argc, argv,
715
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
723
error(0, errno, "argp_parse");
724
exitstatus = EX_OSERR;
727
exitstatus = EX_USAGE;
691
/* Strip permissions down to nobody */
746
/* Work around Debian bug #633582:
747
<http://bugs.debian.org/633582> */
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
749
if(plugindir_fd == -1){
750
error(0, errno, "open");
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
754
error(0, errno, "fstat");
756
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
757
ret = fchown(plugindir_fd, uid, gid);
759
error(0, errno, "fchown");
763
TEMP_FAILURE_RETRY(close(plugindir_fd));
767
/* Lower permissions */
770
error(0, errno, "setgid");
696
772
ret = setuid(uid);
701
if(plugindir == NULL){
704
dir = opendir(plugindir);
708
perror("Could not open plugin dir");
709
exitstatus = EXIT_FAILURE;
713
/* Set the FD_CLOEXEC flag on the directory, if possible */
774
error(0, errno, "setuid");
777
/* Open plugin directory with close_on_exec flag */
715
int dir_fd = dirfd(dir);
717
ret = set_cloexec_flag(dir_fd);
719
perror("set_cloexec_flag");
720
exitstatus = EXIT_FAILURE;
780
if(plugindir == NULL){
781
dir_fd = open(PDIR, O_RDONLY |
784
#else /* not O_CLOEXEC */
786
#endif /* not O_CLOEXEC */
789
dir_fd = open(plugindir, O_RDONLY |
792
#else /* not O_CLOEXEC */
794
#endif /* not O_CLOEXEC */
798
error(0, errno, "Could not open plugin dir");
799
exitstatus = EX_UNAVAILABLE;
804
/* Set the FD_CLOEXEC flag on the directory */
805
ret = set_cloexec_flag(dir_fd);
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
809
exitstatus = EX_OSERR;
812
#endif /* O_CLOEXEC */
814
dir = fdopendir(dir_fd);
816
error(0, errno, "Could not open plugin dir");
817
TEMP_FAILURE_RETRY(close(dir_fd));
818
exitstatus = EX_OSERR;