19
19
* along with this program. If not, see
20
20
* <http://www.gnu.org/licenses/>.
22
* Contact the authors at <mandos@recompile.se>.
22
* Contact the authors at <mandos@fukt.bsnet.se>.
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
#include <stdio.h> /* fileno(), fprintf(),
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(),
413
394
.doc = "Group ID the plugins will run as", .group = 3 },
414
395
{ .name = "debug", .key = 132,
415
396
.doc = "Debug mode", .group = 4 },
417
* These reproduce what we would get without ARGP_NO_HELP
419
{ .name = "help", .key = '?',
420
.doc = "Give this help list", .group = -1 },
421
{ .name = "usage", .key = -3,
422
.doc = "Give a short usage message", .group = -1 },
423
{ .name = "version", .key = 'V',
424
.doc = "Print program version", .group = -1 },
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
434
405
case 'g': /* --global-options */
436
407
char *plugin_option;
437
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
438
412
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
445
419
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
450
427
case 'o': /* --options-for */
452
char *option_list = strchr(arg, ':');
453
if(option_list == NULL){
454
argp_error(state, "No colon in \"%s\"", arg);
461
argp_error(state, "Empty plugin name");
466
while((option = strsep(&option_list, ",")) != NULL){
467
if(not add_argument(getplugin(arg), option)){
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;
474
442
case 'E': /* --env-for */
476
447
char *envdef = strchr(arg, ':');
477
448
if(envdef == NULL){
478
argp_error(state, "No colon in \"%s\"", arg);
485
argp_error(state, "Empty plugin name");
489
if(add_environment(getplugin(arg), envdef, true)){
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
494
457
case 'd': /* --disable */
496
459
plugin *p = getplugin(arg);
461
return ARGP_ERR_UNKNOWN;
503
466
case 'e': /* --enable */
505
468
plugin *p = getplugin(arg);
470
return ARGP_ERR_UNKNOWN;
512
475
case 128: /* --plugin-dir */
514
477
plugindir = strdup(arg);
515
if(plugindir != NULL){
478
if(plugindir == NULL){
519
482
case 129: /* --config-file */
520
483
/* This is already done by parse_opt_config_file() */
522
485
case 130: /* --userid */
523
tmp_id = strtoimax(arg, &tmp, 10);
487
tmpmax = strtoimax(arg, &tmp, 10);
524
488
if(errno != 0 or tmp == arg or *tmp != '\0'
525
or tmp_id != (uid_t)tmp_id){
526
argp_error(state, "Bad user ID number: \"%s\", using %"
527
PRIdMAX, arg, (intmax_t)uid);
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
533
496
case 131: /* --groupid */
534
tmp_id = strtoimax(arg, &tmp, 10);
498
tmpmax = strtoimax(arg, &tmp, 10);
535
499
if(errno != 0 or tmp == arg or *tmp != '\0'
536
or tmp_id != (gid_t)tmp_id){
537
argp_error(state, "Bad group ID number: \"%s\", using %"
538
PRIdMAX, arg, (intmax_t)gid);
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
544
507
case 132: /* --debug */
548
* These reproduce what we would get without ARGP_NO_HELP
550
case '?': /* --help */
551
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
552
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
553
case -3: /* --usage */
554
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
555
argp_state_help(state, state->out_stream,
556
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
557
case 'V': /* --version */
558
fprintf(state->out_stream, "%s\n", argp_program_version);
562
511
* When adding more options before this line, remember to also add a
563
512
* "case" to the "parse_opt_config_file" function below.
715
648
/* Check for harmful errors and go to fallback. Other errors might
716
649
not affect opening plugins */
717
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
652
exitstatus = EXIT_FAILURE;
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
725
658
if(custom_argv != NULL){
726
ret = argp_parse(&argp, custom_argc, custom_argv,
727
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
735
error(0, errno, "argp_parse");
736
exitstatus = EX_OSERR;
739
exitstatus = EX_CONFIG;
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;
744
668
/* Parse actual command line arguments, to let them override the
746
ret = argp_parse(&argp, argc, argv,
747
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
755
error(0, errno, "argp_parse");
756
exitstatus = EX_OSERR;
759
exitstatus = EX_USAGE;
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;
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open");
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
786
error(0, errno, "fstat");
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
791
error(0, errno, "fchown");
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
/* Lower permissions */
691
/* Strip permissions down to nobody */
802
error(0, errno, "setgid");
804
696
ret = setuid(uid);
806
error(0, errno, "setuid");
809
/* Open plugin directory with close_on_exec flag */
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 */
812
if(plugindir == NULL){
813
dir_fd = open(PDIR, O_RDONLY |
816
#else /* not O_CLOEXEC */
818
#endif /* not O_CLOEXEC */
821
dir_fd = open(plugindir, O_RDONLY |
824
#else /* not O_CLOEXEC */
826
#endif /* not O_CLOEXEC */
830
error(0, errno, "Could not open plugin dir");
831
exitstatus = EX_UNAVAILABLE;
836
/* Set the FD_CLOEXEC flag on the directory */
837
ret = set_cloexec_flag(dir_fd);
839
error(0, errno, "set_cloexec_flag");
840
TEMP_FAILURE_RETRY(close(dir_fd));
841
exitstatus = EX_OSERR;
844
#endif /* O_CLOEXEC */
846
dir = fdopendir(dir_fd);
848
error(0, errno, "Could not open plugin dir");
849
TEMP_FAILURE_RETRY(close(dir_fd));
850
exitstatus = EX_OSERR;
715
int dir_fd = dirfd(dir);
717
ret = set_cloexec_flag(dir_fd);
719
perror("set_cloexec_flag");
720
exitstatus = EXIT_FAILURE;
1238
1067
bool bret = print_out_password(proc->buffer,
1239
1068
proc->buffer_length);
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
1247
1076
/* This process has not completed. Does it have any output? */
1248
#if defined (__GNUC__) and defined (__GLIBC__)
1249
#if not __GLIBC_PREREQ(2, 16)
1250
#pragma GCC diagnostic push
1251
#pragma GCC diagnostic ignored "-Wsign-conversion"
1254
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1260
#if defined (__GNUC__) and defined (__GLIBC__)
1261
#if not __GLIBC_PREREQ(2, 16)
1262
#pragma GCC diagnostic pop
1077
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1265
1078
/* This process had nothing to say at this time */
1266
1079
proc = proc->next;
1269
1082
/* Before reading, make the process' data buffer large enough */
1270
1083
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1271
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1272
+ (size_t) BUFFER_SIZE);
1273
if(new_buffer == NULL){
1274
error(0, errno, "malloc");
1275
exitstatus = EX_OSERR;
1084
proc->buffer = realloc(proc->buffer, proc->buffer_size
1085
+ (size_t) BUFFER_SIZE);
1086
if(proc->buffer == NULL){
1088
exitstatus = EXIT_FAILURE;
1278
proc->buffer = new_buffer;
1279
1091
proc->buffer_size += BUFFER_SIZE;
1281
1093
/* Read from the process */