37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
51
dup2(), STDOUT_FILENO, _exit(),
50
52
execv(), write(), read(),
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
58
61
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
60
64
#include <signal.h> /* struct sigaction, sigemptyset(),
61
65
sigaddset(), sigaction(),
62
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
64
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
76
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
const char *argp_program_version = "plugin-runner 1.0";
78
#define PDIR "/lib/mandos/plugins.d"
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
const char *argp_program_version = "plugin-runner " VERSION;
70
82
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
typedef struct process{
86
84
typedef struct plugin{
87
85
char *name; /* can be NULL or any plugin name */
175
209
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
210
static bool add_environment(plugin *p, const char *def, bool replace){
214
/* namelen = length of name of environment variable */
215
size_t namelen = (size_t)(strchrnul(def, '=') - def);
216
/* Search for this environment variable */
217
for(char **e = p->environ; *e != NULL; e++){
218
if(strncmp(*e, def, namelen + 1) == 0){
219
/* It already exists */
223
new = realloc(*e, strlen(def) + 1);
224
} while(new == NULL and errno == EINTR);
180
234
return add_to_char_array(def, &(p->environ), &(p->envc));
185
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
186
239
* Descriptor Flags".
187
* *Note File Descriptor Flags:(libc)Descriptor Flags.
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
189
static int set_cloexec_flag(int fd)
191
int ret = fcntl(fd, F_GETFD, 0);
242
static int set_cloexec_flag(int fd){
243
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
192
244
/* If reading the flags failed, return error indication now. */
196
248
/* Store modified flag word in the descriptor. */
197
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
200
process *process_list = NULL;
202
/* Mark a process as completed when it exits, and save its exit
254
/* Mark processes as completed when they exit, and save their exit
204
void handle_sigchld(__attribute__((unused)) int sig){
205
process *proc = process_list;
207
pid_t pid = wait(&status);
212
while(proc != NULL and proc->pid != pid){
216
/* Process not found in process list */
219
proc->status = status;
220
proc->completed = true;
256
static void handle_sigchld(__attribute__((unused)) int sig){
257
int old_errno = errno;
259
plugin *proc = plugin_list;
261
pid_t pid = waitpid(-1, &status, WNOHANG);
263
/* Only still running child processes */
268
/* No child processes */
271
error(0, errno, "waitpid");
274
/* A child exited, find it in process_list */
275
while(proc != NULL and proc->pid != pid){
279
/* Process not found in process list */
282
proc->status = status;
223
bool print_out_password(const char *buffer, size_t length){
288
/* Prints out a password to stdout */
289
static bool print_out_password(const char *buffer, size_t length){
225
if(length>0 and buffer[length-1] == '\n'){
228
291
for(size_t written = 0; written < length; written += (size_t)ret){
229
292
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
230
293
length - written));
312
375
{ .name = "global-options", .key = 'g',
313
376
.arg = "OPTION[,OPTION[,...]]",
314
377
.doc = "Options passed to all plugins" },
315
{ .name = "global-envs", .key = 'e',
378
{ .name = "global-env", .key = 'G',
316
379
.arg = "VAR=value",
317
380
.doc = "Environment variable passed to all plugins" },
318
381
{ .name = "options-for", .key = 'o',
319
382
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
320
383
.doc = "Options passed only to specified plugin" },
321
{ .name = "envs-for", .key = 'f',
384
{ .name = "env-for", .key = 'E',
322
385
.arg = "PLUGIN:ENV=value",
323
386
.doc = "Environment variable passed to specified plugin" },
324
387
{ .name = "disable", .key = 'd',
326
389
.doc = "Disable a specific plugin", .group = 1 },
390
{ .name = "enable", .key = 'e',
392
.doc = "Enable a specific plugin", .group = 1 },
327
393
{ .name = "plugin-dir", .key = 128,
328
394
.arg = "DIRECTORY",
329
395
.doc = "Specify a different plugin directory", .group = 2 },
330
{ .name = "userid", .key = 129,
331
.arg = "ID", .flags = 0,
332
.doc = "User ID the plugins will run as", .group = 2 },
333
{ .name = "groupid", .key = 130,
334
.arg = "ID", .flags = 0,
335
.doc = "Group ID the plugins will run as", .group = 2 },
336
{ .name = "debug", .key = 131,
337
.doc = "Debug mode", .group = 3 },
396
{ .name = "config-file", .key = 129,
398
.doc = "Specify a different configuration file", .group = 2 },
399
{ .name = "userid", .key = 130,
400
.arg = "ID", .flags = 0,
401
.doc = "User ID the plugins will run as", .group = 3 },
402
{ .name = "groupid", .key = 131,
403
.arg = "ID", .flags = 0,
404
.doc = "Group ID the plugins will run as", .group = 3 },
405
{ .name = "debug", .key = 132,
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 },
341
error_t parse_opt (int key, char *arg, struct argp_state *state) {
342
/* Get the INPUT argument from `argp_parse', which we know is a
343
pointer to our plugin list pointer. */
344
plugin **plugins = state->input;
349
while((p = strsep(&arg, ",")) != NULL){
353
if(not add_argument(getplugin(NULL, plugins), p)){
354
perror("add_argument");
355
return ARGP_ERR_UNKNOWN;
365
char *envdef = strdup(arg);
369
if(not add_environment(getplugin(NULL, plugins), envdef)){
370
perror("add_environment");
376
char *p_name = strsep(&arg, ":");
377
if(p_name[0] == '\0'){
380
char *opt = strsep(&arg, ":");
386
while((p = strsep(&opt, ",")) != NULL){
390
if(not add_argument(getplugin(p_name, plugins), p)){
391
perror("add_argument");
392
return ARGP_ERR_UNKNOWN;
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
424
case 'g': /* --global-options */
427
while((plugin_option = strsep(&arg, ",")) != NULL){
428
if(not add_argument(getplugin(NULL), plugin_option)){
434
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
437
case 'o': /* --options-for */
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)){
460
case 'E': /* --env-for */
403
462
char *envdef = strchr(arg, ':');
404
463
if(envdef == NULL){
407
char *p_name = strndup(arg, (size_t) (envdef-arg));
464
argp_error(state, "No colon in \"%s\"", arg);
412
if(not add_environment(getplugin(p_name, plugins), envdef)){
413
perror("add_environment");
419
plugin *p = getplugin(arg, plugins);
421
return ARGP_ERR_UNKNOWN;
430
uid = (uid_t)strtol(arg, NULL, 10);
433
gid = (gid_t)strtol(arg, NULL, 10);
471
argp_error(state, "Empty plugin name");
475
add_environment(getplugin(arg), envdef, true);
478
case 'd': /* --disable */
480
plugin *p = getplugin(arg);
486
case 'e': /* --enable */
488
plugin *p = getplugin(arg);
494
case 128: /* --plugin-dir */
496
plugindir = strdup(arg);
498
case 129: /* --config-file */
499
/* This is already done by parse_opt_config_file() */
501
case 130: /* --userid */
502
tmpmax = strtoimax(arg, &tmp, 10);
503
if(errno != 0 or tmp == arg or *tmp != '\0'
504
or tmpmax != (uid_t)tmpmax){
505
argp_error(state, "Bad user ID number: \"%s\", using %"
506
PRIdMAX, arg, (intmax_t)uid);
511
case 131: /* --groupid */
512
tmpmax = strtoimax(arg, &tmp, 10);
513
if(errno != 0 or tmp == arg or *tmp != '\0'
514
or tmpmax != (gid_t)tmpmax){
515
argp_error(state, "Bad group ID number: \"%s\", using %"
516
PRIdMAX, arg, (intmax_t)gid);
521
case 132: /* --debug */
439
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
444
return ARGP_ERR_UNKNOWN;
449
plugin *plugin_list = NULL;
451
struct argp argp = { .options = options, .parser = parse_opt,
452
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
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);
539
* When adding more options before this line, remember to also add a
540
* "case" to the "parse_opt_config_file" function below.
543
/* Cryptsetup always passes an argument, which is an empty
544
string if "none" was specified in /etc/crypttab. So if
545
argument was empty, we ignore it silently. */
550
return ARGP_ERR_UNKNOWN;
552
return errno; /* Set to 0 at start */
555
/* This option parser is the same as parse_opt() above, except it
556
ignores everything but the --config-file option. */
557
error_t parse_opt_config_file(int key, char *arg,
558
__attribute__((unused))
559
struct argp_state *state){
562
case 'g': /* --global-options */
563
case 'G': /* --global-env */
564
case 'o': /* --options-for */
565
case 'E': /* --env-for */
566
case 'd': /* --disable */
567
case 'e': /* --enable */
568
case 128: /* --plugin-dir */
570
case 129: /* --config-file */
572
argfile = strdup(arg);
574
case 130: /* --userid */
575
case 131: /* --groupid */
576
case 132: /* --debug */
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
583
return ARGP_ERR_UNKNOWN;
588
struct argp argp = { .options = options,
589
.parser = parse_opt_config_file,
453
591
.doc = "Mandos plugin runner -- Run plugins" };
455
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
456
if (ret == ARGP_ERR_UNKNOWN){
457
fprintf(stderr, "Unknown error while parsing arguments\n");
458
exitstatus = EXIT_FAILURE;
462
conffp = fopen(argfile, "r");
593
/* Parse using parse_opt_config_file() in order to get the custom
594
config file location, if any. */
595
ret = argp_parse(&argp, argc, argv,
596
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
604
error(0, errno, "argp_parse");
605
exitstatus = EX_OSERR;
608
exitstatus = EX_USAGE;
612
/* Reset to the normal argument parser */
613
argp.parser = parse_opt;
615
/* Open the configfile if available */
617
conffp = fopen(AFILE, "r");
619
conffp = fopen(argfile, "r");
463
621
if(conffp != NULL){
464
622
char *org_line = NULL;
465
623
char *p, *arg, *new_arg, *line;
468
625
const char whitespace_delims[] = " \r\t\f\v\n";
469
626
const char comment_delim[] = "#";
629
custom_argv = malloc(sizeof(char*) * 2);
630
if(custom_argv == NULL){
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
635
custom_argv[0] = argv[0];
636
custom_argv[1] = NULL;
638
/* for each line in the config file, strip whitespace and ignore
472
641
sret = getline(&org_line, &size, conffp);
478
647
arg = strsep(&line, comment_delim);
479
648
while((p = strsep(&arg, whitespace_delims)) != NULL){
483
652
new_arg = strdup(p);
484
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
485
if (custom_argv == NULL){
486
perror("add_to_argv");
487
exitstatus = EXIT_FAILURE;
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
661
custom_argv = realloc(custom_argv, sizeof(char *)
662
* ((unsigned int) custom_argc + 1));
663
if(custom_argv == NULL){
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
669
custom_argv[custom_argc-1] = new_arg;
670
custom_argv[custom_argc] = NULL;
674
ret = fclose(conffp);
675
} while(ret == EOF and errno == EINTR);
677
error(0, errno, "fclose");
678
exitstatus = EX_IOERR;
494
683
/* Check for harmful errors and go to fallback. Other errors might
495
684
not affect opening plugins */
496
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
498
exitstatus = EXIT_FAILURE;
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
503
693
if(custom_argv != NULL){
504
custom_argv[0] = argv[0];
505
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
506
if (ret == ARGP_ERR_UNKNOWN){
507
fprintf(stderr, "Unknown error while parsing arguments\n");
508
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;
712
/* Parse actual command line arguments, to let them override the
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;
514
732
for(plugin *p = plugin_list; p != NULL; p=p->next){
515
733
fprintf(stderr, "Plugin: %s has %d arguments\n",
517
735
for(char **a = p->argv; *a != NULL; a++){
518
736
fprintf(stderr, "\tArg: %s\n", *a);
520
fprintf(stderr, "...and %u environment variables\n", p->envc);
738
fprintf(stderr, "...and %d environment variables\n", p->envc);
521
739
for(char **a = p->environ; *a != NULL; a++){
522
740
fprintf(stderr, "\t%s\n", *a);
745
/* Strip permissions down to nobody */
748
error(0, errno, "setgid");
527
750
ret = setuid(uid);
537
dir = opendir(plugindir);
539
perror("Could not open plugin dir");
540
exitstatus = EXIT_FAILURE;
544
/* Set the FD_CLOEXEC flag on the directory, if possible */
752
error(0, errno, "setuid");
755
/* Open plugin directory with close_on_exec flag */
546
int dir_fd = dirfd(dir);
548
ret = set_cloexec_flag(dir_fd);
550
perror("set_cloexec_flag");
551
exitstatus = EXIT_FAILURE;
758
if(plugindir == NULL){
759
dir_fd = open(PDIR, O_RDONLY |
762
#else /* not O_CLOEXEC */
764
#endif /* not O_CLOEXEC */
767
dir_fd = open(plugindir, O_RDONLY |
770
#else /* not O_CLOEXEC */
772
#endif /* not O_CLOEXEC */
776
error(0, errno, "Could not open plugin dir");
777
exitstatus = EX_UNAVAILABLE;
782
/* Set the FD_CLOEXEC flag on the directory */
783
ret = set_cloexec_flag(dir_fd);
785
error(0, errno, "set_cloexec_flag");
786
TEMP_FAILURE_RETRY(close(dir_fd));
787
exitstatus = EX_OSERR;
790
#endif /* O_CLOEXEC */
792
dir = fdopendir(dir_fd);
794
error(0, errno, "Could not open plugin dir");
795
TEMP_FAILURE_RETRY(close(dir_fd));
796
exitstatus = EX_OSERR;
557
801
FD_ZERO(&rfds_all);
803
/* Read and execute any executable in the plugin directory*/
560
dirst = readdir(dir);
806
dirst = readdir(dir);
807
} while(dirst == NULL and errno == EINTR);
562
// All directory entries have been processed
809
/* All directory entries have been processed */
563
810
if(dirst == NULL){
566
exitstatus = EXIT_FAILURE;
812
error(0, errno, "readdir");
813
exitstatus = EX_IOERR;
675
931
if(p->environ[0] != NULL){
676
932
for(char **e = environ; *e != NULL; e++){
677
char *copy = strdup(*e);
682
if(not add_environment(p, copy)){
683
perror("add_environment");
933
if(not add_environment(p, *e, false)){
934
error(0, errno, "add_environment");
692
exitstatus = EXIT_FAILURE;
940
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
942
error(0, errno, "pipe");
943
exitstatus = EX_OSERR;
946
/* Ask OS to automatic close the pipe on exec */
695
947
ret = set_cloexec_flag(pipefd[0]);
697
perror("set_cloexec_flag");
698
exitstatus = EXIT_FAILURE;
949
error(0, errno, "set_cloexec_flag");
950
exitstatus = EX_OSERR;
701
953
ret = set_cloexec_flag(pipefd[1]);
703
perror("set_cloexec_flag");
704
exitstatus = EXIT_FAILURE;
955
error(0, errno, "set_cloexec_flag");
956
exitstatus = EX_OSERR;
707
959
/* Block SIGCHLD until process is safely in process list */
708
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
961
&sigchld_action.sa_mask,
710
perror("sigprocmask");
711
exitstatus = EXIT_FAILURE;
964
error(0, errno, "sigprocmask");
965
exitstatus = EX_OSERR;
714
// Starting a new process to be watched
968
/* Starting a new process to be watched */
972
} while(pid == -1 and errno == EINTR);
718
exitstatus = EXIT_FAILURE;
974
error(0, errno, "fork");
975
exitstatus = EX_OSERR;
722
979
/* this is the child process */
723
980
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
982
error(0, errno, "sigaction");
728
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
985
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
730
perror("sigprocmask");
987
error(0, errno, "sigprocmask");
734
991
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
993
error(0, errno, "dup2");
740
997
if(dirfd(dir) < 0){
745
1002
if(p->environ[0] == NULL){
746
1003
if(execv(filename, p->argv) < 0){
1004
error(0, errno, "execv for %s", filename);
751
1008
if(execve(filename, p->argv, p->environ) < 0){
1009
error(0, errno, "execve for %s", filename);
1015
/* Parent process */
1016
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
760
close(pipefd[1]); /* close unused write end of pipe */
761
process *new_process = malloc(sizeof(process));
762
if (new_process == NULL){
764
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1019
plugin *new_plugin = getplugin(dirst->d_name);
1020
if(new_plugin == NULL){
1021
error(0, errno, "getplugin");
1022
ret = (int)(TEMP_FAILURE_RETRY
1023
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
766
perror("sigprocmask");
1026
error(0, errno, "sigprocmask");
768
exitstatus = EXIT_FAILURE;
1028
exitstatus = EX_OSERR;
772
*new_process = (struct process){ .pid = pid,
774
.next = process_list };
776
process_list = new_process;
1032
new_plugin->pid = pid;
1033
new_plugin->fd = pipefd[0];
777
1035
/* Unblock SIGCHLD so signal handler can be run if this process
778
1036
has already completed */
779
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1038
&sigchld_action.sa_mask,
781
perror("sigprocmask");
782
exitstatus = EXIT_FAILURE;
1041
error(0, errno, "sigprocmask");
1042
exitstatus = EX_OSERR;
786
FD_SET(new_process->fd, &rfds_all);
1046
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
788
if (maxfd < new_process->fd){
789
maxfd = new_process->fd;
1049
if(maxfd < new_plugin->fd){
1050
maxfd = new_plugin->fd;
794
free_plugin_list(plugin_list);
1054
TEMP_FAILURE_RETRY(closedir(dir));
799
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1056
free_plugin(getplugin(NULL));
1058
for(plugin *p = plugin_list; p != NULL; p = p->next){
1062
if(p->next == NULL){
1063
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1069
/* Main loop while running plugins exist */
805
1071
fd_set rfds = rfds_all;
806
1072
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
807
if (select_ret == -1){
809
exitstatus = EXIT_FAILURE;
1073
if(select_ret == -1 and errno != EINTR){
1074
error(0, errno, "select");
1075
exitstatus = EX_OSERR;
812
1078
/* OK, now either a process completed, or something can be read
813
1079
from one of them */
814
for(process *proc = process_list; proc ; proc = proc->next){
1080
for(plugin *proc = plugin_list; proc != NULL;){
815
1081
/* Is this process completely done? */
816
if(proc->eof and proc->completed){
1082
if(proc->completed and proc->eof){
817
1083
/* Only accept the plugin output if it exited cleanly */
818
1084
if(not WIFEXITED(proc->status)
819
1085
or WEXITSTATUS(proc->status) != 0){
820
1086
/* Bad exit by plugin */
822
1089
if(WIFEXITED(proc->status)){
823
fprintf(stderr, "Plugin %u exited with status %d\n",
824
(unsigned int) (proc->pid),
1090
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1091
" status %d\n", proc->name,
1092
(intmax_t) (proc->pid),
825
1093
WEXITSTATUS(proc->status));
826
} else if(WIFSIGNALED(proc->status)) {
827
fprintf(stderr, "Plugin %u killed by signal %d\n",
828
(unsigned int) (proc->pid),
829
WTERMSIG(proc->status));
1094
} else if(WIFSIGNALED(proc->status)){
1095
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1096
" signal %d: %s\n", proc->name,
1097
(intmax_t) (proc->pid),
1098
WTERMSIG(proc->status),
1099
strsignal(WTERMSIG(proc->status)));
830
1100
} else if(WCOREDUMP(proc->status)){
831
fprintf(stderr, "Plugin %d dumped core\n",
832
(unsigned int) (proc->pid));
1101
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1102
" core\n", proc->name, (intmax_t) (proc->pid));
835
1106
/* Remove the plugin */
836
FD_CLR(proc->fd, &rfds_all);
1107
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
837
1110
/* Block signal while modifying process_list */
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1113
&sigchld_action.sa_mask,
840
perror("sigprocmask");
841
exitstatus = EXIT_FAILURE;
1116
error(0, errno, "sigprocmask");
1117
exitstatus = EX_OSERR;
844
/* Delete this process entry from the list */
845
if(process_list == proc){
846
/* First one - simple */
847
process_list = proc->next;
849
/* Second one or later */
850
for(process *p = process_list; p != NULL; p = p->next){
852
p->next = proc->next;
1121
plugin *next_plugin = proc->next;
857
1125
/* We are done modifying process list, so unblock signal */
858
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1126
ret = (int)(TEMP_FAILURE_RETRY
1127
(sigprocmask(SIG_UNBLOCK,
1128
&sigchld_action.sa_mask, NULL)));
861
perror("sigprocmask");
865
/* We deleted this process from the list, so we can't go
866
proc->next. Therefore, start over from the beginning of
1130
error(0, errno, "sigprocmask");
1131
exitstatus = EX_OSERR;
1135
if(plugin_list == NULL){
870
1142
/* This process exited nicely, so print its buffer */
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1144
bool bret = print_out_password(proc->buffer,
1145
proc->buffer_length);
874
perror("print_out_password");
875
exitstatus = EXIT_FAILURE;
1147
error(0, errno, "print_out_password");
1148
exitstatus = EX_IOERR;
879
1153
/* This process has not completed. Does it have any output? */
880
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
881
1157
/* This process had nothing to say at this time */
884
1161
/* Before reading, make the process' data buffer large enough */
885
1162
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
886
1163
proc->buffer = realloc(proc->buffer, proc->buffer_size
887
1164
+ (size_t) BUFFER_SIZE);
888
if (proc->buffer == NULL){
890
exitstatus = EXIT_FAILURE;
1165
if(proc->buffer == NULL){
1166
error(0, errno, "malloc");
1167
exitstatus = EX_OSERR;
893
1170
proc->buffer_size += BUFFER_SIZE;
895
1172
/* Read from the process */
896
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1173
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1175
+ proc->buffer_length,
899
1178
/* Read error from this process; ignore the error */
904
1184
proc->eof = true;
906
proc->buffer_length += (size_t) ret;
1186
proc->buffer_length += (size_t) sret;
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
1194
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1195
and exitstatus != EX_OK)){
1196
/* Fallback if all plugins failed, none are found or an error
917
1199
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
1200
char *passwordbuffer = getpass("Password: ");
919
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1201
size_t len = strlen(passwordbuffer);
1202
/* Strip trailing newline */
1203
if(len > 0 and passwordbuffer[len-1] == '\n'){
1204
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1207
bret = print_out_password(passwordbuffer, len);
921
perror("print_out_password");
922
exitstatus = EXIT_FAILURE;
1209
error(0, errno, "print_out_password");
1210
exitstatus = EX_IOERR;
926
1214
/* Restore old signal handler */
927
1215
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
930
exitstatus = EXIT_FAILURE;
1217
error(0, errno, "sigaction");
1218
exitstatus = EX_OSERR;
933
1221
if(custom_argv != NULL){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
1222
for(char **arg = custom_argv+1; *arg != NULL; arg++){
937
1225
free(custom_argv);
939
free_plugin_list(plugin_list);
941
1228
if(dir != NULL){
945
/* Free the process list and kill the processes */
946
for(process *next; process_list != NULL; process_list = next){
947
next = process_list->next;
948
close(process_list->fd);
949
ret = kill(process_list->pid, SIGTERM);
950
if(ret == -1 and errno != ESRCH){
951
/* set-uid proccesses migth not get closed */
1232
/* Kill the processes */
1233
for(plugin *p = plugin_list; p != NULL; p = p->next){
1236
ret = kill(p->pid, SIGTERM);
1237
if(ret == -1 and errno != ESRCH){
1238
/* Set-uid proccesses might not get closed */
1239
error(0, errno, "kill");
954
free(process_list->buffer);
958
1244
/* Wait for any remaining child processes to terminate */
960
1246
ret = wait(NULL);
961
1247
} while(ret >= 0);
962
1248
if(errno != ECHILD){
1249
error(0, errno, "wait");
966
1257
return exitstatus;