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,
92
/* Variables used for running processes*/
99
volatile sig_atomic_t completed;
94
101
struct plugin *next;
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
100
or (p->name and name and (strcmp(p->name, name) == 0))){
104
static plugin *plugin_list = NULL;
106
/* Gets an existing plugin based on name,
107
or if none is found, creates a new one */
108
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
112
or (p->name and name and (strcmp(p->name, name) == 0))){
104
116
/* Create a new plugin */
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
117
plugin *new_plugin = NULL;
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
109
124
char *copy_name = NULL;
110
125
if(name != NULL){
111
copy_name = strdup(name);
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
112
129
if(copy_name == NULL){
117
*new_plugin = (plugin) { .name = copy_name,
121
.next = *plugin_list };
137
*new_plugin = (plugin){ .name = copy_name,
140
.next = plugin_list };
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
126
148
free(new_plugin);
129
152
new_plugin->argv[0] = copy_name;
130
153
new_plugin->argv[1] = NULL;
132
new_plugin->environ = malloc(sizeof(char *));
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
133
158
if(new_plugin->environ == NULL){
135
161
free(new_plugin->argv);
136
162
free(new_plugin);
139
166
new_plugin->environ[0] = NULL;
140
168
/* Append the new plugin to the list */
141
*plugin_list = new_plugin;
169
plugin_list = new_plugin;
142
170
return new_plugin;
145
173
/* Helper function for add_argument and add_environment */
174
__attribute__((nonnull))
146
175
static bool add_to_char_array(const char *new, char ***array,
148
177
/* Resize the pointed-to array to hold one more pointer */
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
178
char **new_array = NULL;
180
new_array = realloc(*array, sizeof(char *)
181
* (size_t) ((*len) + 2));
182
} while(new_array == NULL and errno == EINTR);
151
183
/* Malloc check */
184
if(new_array == NULL){
155
188
/* Make a copy of the new string */
156
char *copy = strdup(new);
192
} while(copy == NULL and errno == EINTR);
157
193
if(copy == NULL){
323
382
{ .name = "global-options", .key = 'g',
324
383
.arg = "OPTION[,OPTION[,...]]",
325
384
.doc = "Options passed to all plugins" },
326
{ .name = "global-envs", .key = 'e',
385
{ .name = "global-env", .key = 'G',
327
386
.arg = "VAR=value",
328
387
.doc = "Environment variable passed to all plugins" },
329
388
{ .name = "options-for", .key = 'o',
330
389
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
331
390
.doc = "Options passed only to specified plugin" },
332
{ .name = "envs-for", .key = 'f',
391
{ .name = "env-for", .key = 'E',
333
392
.arg = "PLUGIN:ENV=value",
334
393
.doc = "Environment variable passed to specified plugin" },
335
394
{ .name = "disable", .key = 'd',
337
396
.doc = "Disable a specific plugin", .group = 1 },
397
{ .name = "enable", .key = 'e',
399
.doc = "Enable a specific plugin", .group = 1 },
338
400
{ .name = "plugin-dir", .key = 128,
339
401
.arg = "DIRECTORY",
340
402
.doc = "Specify a different plugin directory", .group = 2 },
341
{ .name = "userid", .key = 129,
342
.arg = "ID", .flags = 0,
343
.doc = "User ID the plugins will run as", .group = 2 },
344
{ .name = "groupid", .key = 130,
345
.arg = "ID", .flags = 0,
346
.doc = "Group ID the plugins will run as", .group = 2 },
347
{ .name = "debug", .key = 131,
348
.doc = "Debug mode", .group = 3 },
403
{ .name = "config-file", .key = 129,
405
.doc = "Specify a different configuration file", .group = 2 },
406
{ .name = "userid", .key = 130,
407
.arg = "ID", .flags = 0,
408
.doc = "User ID the plugins will run as", .group = 3 },
409
{ .name = "groupid", .key = 131,
410
.arg = "ID", .flags = 0,
411
.doc = "Group ID the plugins will run as", .group = 3 },
412
{ .name = "debug", .key = 132,
413
.doc = "Debug mode", .group = 4 },
415
* These reproduce what we would get without ARGP_NO_HELP
417
{ .name = "help", .key = '?',
418
.doc = "Give this help list", .group = -1 },
419
{ .name = "usage", .key = -3,
420
.doc = "Give a short usage message", .group = -1 },
421
{ .name = "version", .key = 'V',
422
.doc = "Print program version", .group = -1 },
352
error_t parse_opt (int key, char *arg, struct argp_state *state) {
353
/* Get the INPUT argument from `argp_parse', which we know is a
354
pointer to our plugin list pointer. */
355
plugin **plugins = state->input;
360
while((p = strsep(&arg, ",")) != NULL){
364
if(not add_argument(getplugin(NULL, plugins), p)){
365
perror("add_argument");
366
return ARGP_ERR_UNKNOWN;
376
char *envdef = strdup(arg);
380
if(not add_environment(getplugin(NULL, plugins), envdef)){
381
perror("add_environment");
387
char *p_name = strsep(&arg, ":");
388
if(p_name[0] == '\0'){
391
char *opt = strsep(&arg, ":");
397
while((p = strsep(&opt, ",")) != NULL){
401
if(not add_argument(getplugin(p_name, plugins), p)){
402
perror("add_argument");
403
return ARGP_ERR_UNKNOWN;
426
__attribute__((nonnull(3)))
427
error_t parse_opt(int key, char *arg, struct argp_state *state){
432
case 'g': /* --global-options */
435
while((plugin_option = strsep(&arg, ",")) != NULL){
436
if(not add_argument(getplugin(NULL), plugin_option)){
442
case 'G': /* --global-env */
443
add_environment(getplugin(NULL), arg, true);
445
case 'o': /* --options-for */
447
char *option_list = strchr(arg, ':');
448
if(option_list == NULL){
449
argp_error(state, "No colon in \"%s\"", arg);
456
argp_error(state, "Empty plugin name");
461
while((option = strsep(&option_list, ",")) != NULL){
462
if(not add_argument(getplugin(arg), option)){
468
case 'E': /* --env-for */
414
470
char *envdef = strchr(arg, ':');
415
471
if(envdef == NULL){
418
char *p_name = strndup(arg, (size_t) (envdef-arg));
472
argp_error(state, "No colon in \"%s\"", arg);
423
if(not add_environment(getplugin(p_name, plugins), envdef)){
424
perror("add_environment");
430
plugin *p = getplugin(arg, plugins);
432
return ARGP_ERR_UNKNOWN;
441
uid = (uid_t)strtol(arg, NULL, 10);
444
gid = (gid_t)strtol(arg, NULL, 10);
479
argp_error(state, "Empty plugin name");
483
add_environment(getplugin(arg), envdef, true);
486
case 'd': /* --disable */
488
plugin *p = getplugin(arg);
494
case 'e': /* --enable */
496
plugin *p = getplugin(arg);
502
case 128: /* --plugin-dir */
504
plugindir = strdup(arg);
506
case 129: /* --config-file */
507
/* This is already done by parse_opt_config_file() */
509
case 130: /* --userid */
510
tmp_id = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmp_id != (uid_t)tmp_id){
513
argp_error(state, "Bad user ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)uid);
519
case 131: /* --groupid */
520
tmp_id = strtoimax(arg, &tmp, 10);
521
if(errno != 0 or tmp == arg or *tmp != '\0'
522
or tmp_id != (gid_t)tmp_id){
523
argp_error(state, "Bad group ID number: \"%s\", using %"
524
PRIdMAX, arg, (intmax_t)gid);
529
case 132: /* --debug */
450
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
455
return ARGP_ERR_UNKNOWN;
460
plugin *plugin_list = NULL;
462
struct argp argp = { .options = options, .parser = parse_opt,
463
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
533
* These reproduce what we would get without ARGP_NO_HELP
535
case '?': /* --help */
536
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
537
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
538
case -3: /* --usage */
539
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
540
argp_state_help(state, state->out_stream,
541
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
542
case 'V': /* --version */
543
fprintf(state->out_stream, "%s\n", argp_program_version);
547
* When adding more options before this line, remember to also add a
548
* "case" to the "parse_opt_config_file" function below.
551
/* Cryptsetup always passes an argument, which is an empty
552
string if "none" was specified in /etc/crypttab. So if
553
argument was empty, we ignore it silently. */
558
return ARGP_ERR_UNKNOWN;
560
return errno; /* Set to 0 at start */
563
/* This option parser is the same as parse_opt() above, except it
564
ignores everything but the --config-file option. */
565
error_t parse_opt_config_file(int key, char *arg,
566
__attribute__((unused))
567
struct argp_state *state){
570
case 'g': /* --global-options */
571
case 'G': /* --global-env */
572
case 'o': /* --options-for */
573
case 'E': /* --env-for */
574
case 'd': /* --disable */
575
case 'e': /* --enable */
576
case 128: /* --plugin-dir */
578
case 129: /* --config-file */
580
argfile = strdup(arg);
582
case 130: /* --userid */
583
case 131: /* --groupid */
584
case 132: /* --debug */
585
case '?': /* --help */
586
case -3: /* --usage */
587
case 'V': /* --version */
591
return ARGP_ERR_UNKNOWN;
596
struct argp argp = { .options = options,
597
.parser = parse_opt_config_file,
464
599
.doc = "Mandos plugin runner -- Run plugins" };
466
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
467
if (ret == ARGP_ERR_UNKNOWN){
468
fprintf(stderr, "Unknown error while parsing arguments\n");
469
exitstatus = EXIT_FAILURE;
473
conffp = fopen(argfile, "r");
601
/* Parse using parse_opt_config_file() in order to get the custom
602
config file location, if any. */
603
ret = argp_parse(&argp, argc, argv,
604
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
612
error(0, errno, "argp_parse");
613
exitstatus = EX_OSERR;
616
exitstatus = EX_USAGE;
620
/* Reset to the normal argument parser */
621
argp.parser = parse_opt;
623
/* Open the configfile if available */
625
conffp = fopen(AFILE, "r");
627
conffp = fopen(argfile, "r");
474
629
if(conffp != NULL){
475
630
char *org_line = NULL;
476
631
char *p, *arg, *new_arg, *line;
479
633
const char whitespace_delims[] = " \r\t\f\v\n";
480
634
const char comment_delim[] = "#";
637
custom_argv = malloc(sizeof(char*) * 2);
638
if(custom_argv == NULL){
639
error(0, errno, "malloc");
640
exitstatus = EX_OSERR;
643
custom_argv[0] = argv[0];
644
custom_argv[1] = NULL;
646
/* for each line in the config file, strip whitespace and ignore
483
649
sret = getline(&org_line, &size, conffp);
489
655
arg = strsep(&line, comment_delim);
490
656
while((p = strsep(&arg, whitespace_delims)) != NULL){
494
660
new_arg = strdup(p);
495
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
496
if (custom_argv == NULL){
497
perror("add_to_argv");
498
exitstatus = EXIT_FAILURE;
662
error(0, errno, "strdup");
663
exitstatus = EX_OSERR;
670
char **new_argv = realloc(custom_argv, sizeof(char *)
673
if(new_argv == NULL){
674
error(0, errno, "realloc");
675
exitstatus = EX_OSERR;
680
custom_argv = new_argv;
683
custom_argv[custom_argc-1] = new_arg;
684
custom_argv[custom_argc] = NULL;
688
ret = fclose(conffp);
689
} while(ret == EOF and errno == EINTR);
691
error(0, errno, "fclose");
692
exitstatus = EX_IOERR;
505
697
/* Check for harmful errors and go to fallback. Other errors might
506
698
not affect opening plugins */
507
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
509
exitstatus = EXIT_FAILURE;
699
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
700
error(0, errno, "fopen");
701
exitstatus = EX_OSERR;
705
/* If there were any arguments from the configuration file, pass
706
them to parser as command line arguments */
514
707
if(custom_argv != NULL){
515
custom_argv[0] = argv[0];
516
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
517
if (ret == ARGP_ERR_UNKNOWN){
518
fprintf(stderr, "Unknown error while parsing arguments\n");
519
exitstatus = EXIT_FAILURE;
708
ret = argp_parse(&argp, custom_argc, custom_argv,
709
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
717
error(0, errno, "argp_parse");
718
exitstatus = EX_OSERR;
721
exitstatus = EX_CONFIG;
726
/* Parse actual command line arguments, to let them override the
728
ret = argp_parse(&argp, argc, argv,
729
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
737
error(0, errno, "argp_parse");
738
exitstatus = EX_OSERR;
741
exitstatus = EX_USAGE;
525
746
for(plugin *p = plugin_list; p != NULL; p=p->next){
526
747
fprintf(stderr, "Plugin: %s has %d arguments\n",
528
749
for(char **a = p->argv; *a != NULL; a++){
529
750
fprintf(stderr, "\tArg: %s\n", *a);
531
fprintf(stderr, "...and %u environment variables\n", p->envc);
752
fprintf(stderr, "...and %d environment variables\n", p->envc);
532
753
for(char **a = p->environ; *a != NULL; a++){
533
754
fprintf(stderr, "\t%s\n", *a);
760
/* Work around Debian bug #633582:
761
<http://bugs.debian.org/633582> */
762
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
763
if(plugindir_fd == -1){
764
error(0, errno, "open");
766
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
768
error(0, errno, "fstat");
770
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
771
ret = fchown(plugindir_fd, uid, gid);
773
error(0, errno, "fchown");
777
TEMP_FAILURE_RETRY(close(plugindir_fd));
781
/* Lower permissions */
784
error(0, errno, "setgid");
538
786
ret = setuid(uid);
548
dir = opendir(plugindir);
550
perror("Could not open plugin dir");
551
exitstatus = EXIT_FAILURE;
555
/* Set the FD_CLOEXEC flag on the directory, if possible */
788
error(0, errno, "setuid");
791
/* Open plugin directory with close_on_exec flag */
557
int dir_fd = dirfd(dir);
559
ret = set_cloexec_flag(dir_fd);
561
perror("set_cloexec_flag");
562
exitstatus = EXIT_FAILURE;
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
798
#else /* not O_CLOEXEC */
800
#endif /* not O_CLOEXEC */
803
dir_fd = open(plugindir, O_RDONLY |
806
#else /* not O_CLOEXEC */
808
#endif /* not O_CLOEXEC */
812
error(0, errno, "Could not open plugin dir");
813
exitstatus = EX_UNAVAILABLE;
818
/* Set the FD_CLOEXEC flag on the directory */
819
ret = set_cloexec_flag(dir_fd);
821
error(0, errno, "set_cloexec_flag");
822
TEMP_FAILURE_RETRY(close(dir_fd));
823
exitstatus = EX_OSERR;
826
#endif /* O_CLOEXEC */
828
dir = fdopendir(dir_fd);
830
error(0, errno, "Could not open plugin dir");
831
TEMP_FAILURE_RETRY(close(dir_fd));
832
exitstatus = EX_OSERR;
568
837
FD_ZERO(&rfds_all);
839
/* Read and execute any executable in the plugin directory*/
571
dirst = readdir(dir);
842
dirst = readdir(dir);
843
} while(dirst == NULL and errno == EINTR);
573
// All directory entries have been processed
845
/* All directory entries have been processed */
574
846
if(dirst == NULL){
577
exitstatus = EXIT_FAILURE;
848
error(0, errno, "readdir");
849
exitstatus = EX_IOERR;
686
983
if(p->environ[0] != NULL){
687
984
for(char **e = environ; *e != NULL; e++){
688
char *copy = strdup(*e);
693
if(not add_environment(p, copy)){
694
perror("add_environment");
985
if(not add_environment(p, *e, false)){
986
error(0, errno, "add_environment");
703
exitstatus = EXIT_FAILURE;
992
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
994
error(0, errno, "pipe");
995
exitstatus = EX_OSERR;
998
/* Ask OS to automatic close the pipe on exec */
706
999
ret = set_cloexec_flag(pipefd[0]);
708
perror("set_cloexec_flag");
709
exitstatus = EXIT_FAILURE;
1001
error(0, errno, "set_cloexec_flag");
1002
exitstatus = EX_OSERR;
712
1005
ret = set_cloexec_flag(pipefd[1]);
714
perror("set_cloexec_flag");
715
exitstatus = EXIT_FAILURE;
1007
error(0, errno, "set_cloexec_flag");
1008
exitstatus = EX_OSERR;
718
1011
/* Block SIGCHLD until process is safely in process list */
719
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1012
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1013
&sigchld_action.sa_mask,
721
perror("sigprocmask");
722
exitstatus = EXIT_FAILURE;
1016
error(0, errno, "sigprocmask");
1017
exitstatus = EX_OSERR;
725
// Starting a new process to be watched
1020
/* Starting a new process to be watched */
1024
} while(pid == -1 and errno == EINTR);
729
exitstatus = EXIT_FAILURE;
1026
error(0, errno, "fork");
1027
exitstatus = EX_OSERR;
733
1031
/* this is the child process */
734
1032
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1034
error(0, errno, "sigaction");
739
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
741
perror("sigprocmask");
1039
error(0, errno, "sigprocmask");
745
1043
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1045
error(0, errno, "dup2");
751
1049
if(dirfd(dir) < 0){
756
1054
if(p->environ[0] == NULL){
757
1055
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
762
1060
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1067
/* Parent process */
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
771
close(pipefd[1]); /* close unused write end of pipe */
772
process *new_process = malloc(sizeof(process));
773
if (new_process == NULL){
775
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1071
plugin *new_plugin = getplugin(dirst->d_name);
1072
if(new_plugin == NULL){
1073
error(0, errno, "getplugin");
1074
ret = (int)(TEMP_FAILURE_RETRY
1075
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
777
perror("sigprocmask");
1078
error(0, errno, "sigprocmask");
779
exitstatus = EXIT_FAILURE;
1080
exitstatus = EX_OSERR;
783
*new_process = (struct process){ .pid = pid,
785
.next = process_list };
787
process_list = new_process;
1084
new_plugin->pid = pid;
1085
new_plugin->fd = pipefd[0];
788
1087
/* Unblock SIGCHLD so signal handler can be run if this process
789
1088
has already completed */
790
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1090
&sigchld_action.sa_mask,
792
perror("sigprocmask");
793
exitstatus = EXIT_FAILURE;
1093
error(0, errno, "sigprocmask");
1094
exitstatus = EX_OSERR;
797
FD_SET(new_process->fd, &rfds_all);
1098
#if defined (__GNUC__) and defined (__GLIBC__)
1099
#if not __GLIBC_PREREQ(2, 16)
1100
#pragma GCC diagnostic push
1101
#pragma GCC diagnostic ignored "-Wsign-conversion"
1104
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion in GNU libc
1107
#if defined (__GNUC__) and defined (__GLIBC__)
1108
#if not __GLIBC_PREREQ(2, 16)
1109
#pragma GCC diagnostic pop
799
if (maxfd < new_process->fd){
800
maxfd = new_process->fd;
1113
if(maxfd < new_plugin->fd){
1114
maxfd = new_plugin->fd;
805
free_plugin_list(plugin_list);
1118
TEMP_FAILURE_RETRY(closedir(dir));
811
if (process_list == NULL){
812
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1120
free_plugin(getplugin(NULL));
1122
for(plugin *p = plugin_list; p != NULL; p = p->next){
1126
if(p->next == NULL){
1127
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1133
/* Main loop while running plugins exist */
817
1135
fd_set rfds = rfds_all;
818
1136
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
819
if (select_ret == -1){
821
exitstatus = EXIT_FAILURE;
1137
if(select_ret == -1 and errno != EINTR){
1138
error(0, errno, "select");
1139
exitstatus = EX_OSERR;
824
1142
/* OK, now either a process completed, or something can be read
825
1143
from one of them */
826
for(process *proc = process_list; proc ; proc = proc->next){
1144
for(plugin *proc = plugin_list; proc != NULL;){
827
1145
/* Is this process completely done? */
828
if(proc->eof and proc->completed){
1146
if(proc->completed and proc->eof){
829
1147
/* Only accept the plugin output if it exited cleanly */
830
1148
if(not WIFEXITED(proc->status)
831
1149
or WEXITSTATUS(proc->status) != 0){
832
1150
/* Bad exit by plugin */
834
1153
if(WIFEXITED(proc->status)){
835
fprintf(stderr, "Plugin %u exited with status %d\n",
836
(unsigned int) (proc->pid),
1154
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1155
" status %d\n", proc->name,
1156
(intmax_t) (proc->pid),
837
1157
WEXITSTATUS(proc->status));
838
} else if(WIFSIGNALED(proc->status)) {
839
fprintf(stderr, "Plugin %u killed by signal %d\n",
840
(unsigned int) (proc->pid),
841
WTERMSIG(proc->status));
1158
} else if(WIFSIGNALED(proc->status)){
1159
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1160
" signal %d: %s\n", proc->name,
1161
(intmax_t) (proc->pid),
1162
WTERMSIG(proc->status),
1163
strsignal(WTERMSIG(proc->status)));
842
1164
} else if(WCOREDUMP(proc->status)){
843
fprintf(stderr, "Plugin %d dumped core\n",
844
(unsigned int) (proc->pid));
1165
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1166
" core\n", proc->name, (intmax_t) (proc->pid));
847
1170
/* Remove the plugin */
848
FD_CLR(proc->fd, &rfds_all);
1171
#if defined (__GNUC__) and defined (__GLIBC__)
1172
#if not __GLIBC_PREREQ(2, 16)
1173
#pragma GCC diagnostic push
1174
#pragma GCC diagnostic ignored "-Wsign-conversion"
1177
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1178
-Wconversion in GNU libc
1180
#if defined (__GNUC__) and defined (__GLIBC__)
1181
#if not __GLIBC_PREREQ(2, 16)
1182
#pragma GCC diagnostic pop
849
1186
/* Block signal while modifying process_list */
850
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1187
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1189
&sigchld_action.sa_mask,
852
perror("sigprocmask");
853
exitstatus = EXIT_FAILURE;
1192
error(0, errno, "sigprocmask");
1193
exitstatus = EX_OSERR;
856
/* Delete this process entry from the list */
857
if(process_list == proc){
858
/* First one - simple */
859
process_list = proc->next;
861
/* Second one or later */
862
for(process *p = process_list; p != NULL; p = p->next){
864
p->next = proc->next;
1197
plugin *next_plugin = proc->next;
869
1201
/* We are done modifying process list, so unblock signal */
870
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1202
ret = (int)(TEMP_FAILURE_RETRY
1203
(sigprocmask(SIG_UNBLOCK,
1204
&sigchld_action.sa_mask, NULL)));
873
perror("sigprocmask");
877
/* We deleted this process from the list, so we can't go
878
proc->next. Therefore, start over from the beginning of
1206
error(0, errno, "sigprocmask");
1207
exitstatus = EX_OSERR;
1211
if(plugin_list == NULL){
882
1218
/* This process exited nicely, so print its buffer */
884
1220
bool bret = print_out_password(proc->buffer,
885
1221
proc->buffer_length);
887
perror("print_out_password");
888
exitstatus = EXIT_FAILURE;
1223
error(0, errno, "print_out_password");
1224
exitstatus = EX_IOERR;
892
1229
/* This process has not completed. Does it have any output? */
893
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1230
#if defined (__GNUC__) and defined (__GLIBC__)
1231
#if not __GLIBC_PREREQ(2, 16)
1232
#pragma GCC diagnostic push
1233
#pragma GCC diagnostic ignored "-Wsign-conversion"
1236
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic pop
894
1247
/* This process had nothing to say at this time */
897
1251
/* Before reading, make the process' data buffer large enough */
898
1252
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
899
proc->buffer = realloc(proc->buffer, proc->buffer_size
900
+ (size_t) BUFFER_SIZE);
901
if (proc->buffer == NULL){
903
exitstatus = EXIT_FAILURE;
1253
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1254
+ (size_t) BUFFER_SIZE);
1255
if(new_buffer == NULL){
1256
error(0, errno, "malloc");
1257
exitstatus = EX_OSERR;
1260
proc->buffer = new_buffer;
906
1261
proc->buffer_size += BUFFER_SIZE;
908
1263
/* Read from the process */
909
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1264
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1266
+ proc->buffer_length,
912
1269
/* Read error from this process; ignore the error */
917
1275
proc->eof = true;
919
proc->buffer_length += (size_t) ret;
1277
proc->buffer_length += (size_t) sret;
927
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1285
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1286
and exitstatus != EX_OK)){
928
1287
/* Fallback if all plugins failed, none are found or an error
931
1290
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
932
1291
char *passwordbuffer = getpass("Password: ");
933
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1292
size_t len = strlen(passwordbuffer);
1293
/* Strip trailing newline */
1294
if(len > 0 and passwordbuffer[len-1] == '\n'){
1295
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1298
bret = print_out_password(passwordbuffer, len);
935
perror("print_out_password");
936
exitstatus = EXIT_FAILURE;
1300
error(0, errno, "print_out_password");
1301
exitstatus = EX_IOERR;
940
1305
/* Restore old signal handler */
941
1306
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
944
exitstatus = EXIT_FAILURE;
1308
error(0, errno, "sigaction");
1309
exitstatus = EX_OSERR;
947
1312
if(custom_argv != NULL){
948
for(char **arg = custom_argv; *arg != NULL; arg++){
1313
for(char **arg = custom_argv+1; *arg != NULL; arg++){
951
1316
free(custom_argv);
953
free_plugin_list(plugin_list);
955
1319
if(dir != NULL){
959
/* Free the process list and kill the processes */
960
for(process *next; process_list != NULL; process_list = next){
961
next = process_list->next;
962
close(process_list->fd);
963
ret = kill(process_list->pid, SIGTERM);
964
if(ret == -1 and errno != ESRCH){
965
/* set-uid proccesses migth not get closed */
1323
/* Kill the processes */
1324
for(plugin *p = plugin_list; p != NULL; p = p->next){
1327
ret = kill(p->pid, SIGTERM);
1328
if(ret == -1 and errno != ESRCH){
1329
/* Set-uid proccesses might not get closed */
1330
error(0, errno, "kill");
968
free(process_list->buffer);
972
1335
/* Wait for any remaining child processes to terminate */
974
1337
ret = wait(NULL);
975
1338
} while(ret >= 0);
976
1339
if(errno != ECHILD){
1340
error(0, errno, "wait");
980
1348
return exitstatus;