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
__attribute__((warn_unused_result))
109
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
or (p->name and name and (strcmp(p->name, name) == 0))){
104
117
/* Create a new plugin */
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
118
plugin *new_plugin = NULL;
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
122
if(new_plugin == NULL){
109
125
char *copy_name = NULL;
110
126
if(name != NULL){
111
copy_name = strdup(name);
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
112
130
if(copy_name == NULL){
117
*new_plugin = (plugin) { .name = copy_name,
121
.next = *plugin_list };
138
*new_plugin = (plugin){ .name = copy_name,
141
.next = plugin_list };
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
126
149
free(new_plugin);
129
153
new_plugin->argv[0] = copy_name;
130
154
new_plugin->argv[1] = NULL;
132
new_plugin->environ = malloc(sizeof(char *));
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
133
159
if(new_plugin->environ == NULL){
135
162
free(new_plugin->argv);
136
163
free(new_plugin);
139
167
new_plugin->environ[0] = NULL;
140
169
/* Append the new plugin to the list */
141
*plugin_list = new_plugin;
170
plugin_list = new_plugin;
142
171
return new_plugin;
145
174
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
146
176
static bool add_to_char_array(const char *new, char ***array,
148
178
/* Resize the pointed-to array to hold one more pointer */
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
179
char **new_array = NULL;
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
151
184
/* Malloc check */
185
if(new_array == NULL){
155
189
/* Make a copy of the new string */
156
char *copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
157
194
if(copy == NULL){
324
384
{ .name = "global-options", .key = 'g',
325
385
.arg = "OPTION[,OPTION[,...]]",
326
386
.doc = "Options passed to all plugins" },
327
{ .name = "global-envs", .key = 'e',
387
{ .name = "global-env", .key = 'G',
328
388
.arg = "VAR=value",
329
389
.doc = "Environment variable passed to all plugins" },
330
390
{ .name = "options-for", .key = 'o',
331
391
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
332
392
.doc = "Options passed only to specified plugin" },
333
{ .name = "envs-for", .key = 'f',
393
{ .name = "env-for", .key = 'E',
334
394
.arg = "PLUGIN:ENV=value",
335
395
.doc = "Environment variable passed to specified plugin" },
336
396
{ .name = "disable", .key = 'd',
338
398
.doc = "Disable a specific plugin", .group = 1 },
399
{ .name = "enable", .key = 'e',
401
.doc = "Enable a specific plugin", .group = 1 },
339
402
{ .name = "plugin-dir", .key = 128,
340
403
.arg = "DIRECTORY",
341
404
.doc = "Specify a different plugin directory", .group = 2 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
405
{ .name = "config-file", .key = 129,
407
.doc = "Specify a different configuration file", .group = 2 },
408
{ .name = "userid", .key = 130,
409
.arg = "ID", .flags = 0,
410
.doc = "User ID the plugins will run as", .group = 3 },
411
{ .name = "groupid", .key = 131,
412
.arg = "ID", .flags = 0,
413
.doc = "Group ID the plugins will run as", .group = 3 },
414
{ .name = "debug", .key = 132,
415
.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 },
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
361
while((p = strsep(&arg, ",")) != NULL){
365
if(not add_argument(getplugin(NULL, plugins), p)){
366
perror("add_argument");
367
return ARGP_ERR_UNKNOWN;
377
char *envdef = strdup(arg);
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
388
char *p_name = strsep(&arg, ":");
389
if(p_name[0] == '\0'){
392
char *opt = strsep(&arg, ":");
398
while((p = strsep(&opt, ",")) != NULL){
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
434
case 'g': /* --global-options */
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
445
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
450
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)){
474
case 'E': /* --env-for */
415
476
char *envdef = strchr(arg, ':');
416
477
if(envdef == NULL){
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
478
argp_error(state, "No colon in \"%s\"", arg);
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
425
perror("add_environment");
431
plugin *p = getplugin(arg, plugins);
433
return ARGP_ERR_UNKNOWN;
442
uid = (uid_t)strtol(arg, NULL, 10);
445
gid = (gid_t)strtol(arg, NULL, 10);
485
argp_error(state, "Empty plugin name");
489
if(add_environment(getplugin(arg), envdef, true)){
494
case 'd': /* --disable */
496
plugin *p = getplugin(arg);
503
case 'e': /* --enable */
505
plugin *p = getplugin(arg);
512
case 128: /* --plugin-dir */
514
plugindir = strdup(arg);
515
if(plugindir != NULL){
519
case 129: /* --config-file */
520
/* This is already done by parse_opt_config_file() */
522
case 130: /* --userid */
523
tmp_id = strtoimax(arg, &tmp, 10);
524
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);
533
case 131: /* --groupid */
534
tmp_id = strtoimax(arg, &tmp, 10);
535
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);
544
case 132: /* --debug */
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
456
return ARGP_ERR_UNKNOWN;
461
plugin *plugin_list = NULL;
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
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
* When adding more options before this line, remember to also add a
563
* "case" to the "parse_opt_config_file" function below.
566
/* Cryptsetup always passes an argument, which is an empty
567
string if "none" was specified in /etc/crypttab. So if
568
argument was empty, we ignore it silently. */
573
return ARGP_ERR_UNKNOWN;
575
return errno; /* Set to 0 at start */
578
/* This option parser is the same as parse_opt() above, except it
579
ignores everything but the --config-file option. */
580
error_t parse_opt_config_file(int key, char *arg,
581
__attribute__((unused))
582
struct argp_state *state){
585
case 'g': /* --global-options */
586
case 'G': /* --global-env */
587
case 'o': /* --options-for */
588
case 'E': /* --env-for */
589
case 'd': /* --disable */
590
case 'e': /* --enable */
591
case 128: /* --plugin-dir */
593
case 129: /* --config-file */
595
argfile = strdup(arg);
600
case 130: /* --userid */
601
case 131: /* --groupid */
602
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
609
return ARGP_ERR_UNKNOWN;
614
struct argp argp = { .options = options,
615
.parser = parse_opt_config_file,
465
617
.doc = "Mandos plugin runner -- Run plugins" };
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
468
if (ret == ARGP_ERR_UNKNOWN){
469
fprintf(stderr, "Unknown error while parsing arguments\n");
470
exitstatus = EXIT_FAILURE;
474
conffp = fopen(argfile, "r");
619
/* Parse using parse_opt_config_file() in order to get the custom
620
config file location, if any. */
621
ret = argp_parse(&argp, argc, argv,
622
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
630
error(0, errno, "argp_parse");
631
exitstatus = EX_OSERR;
634
exitstatus = EX_USAGE;
638
/* Reset to the normal argument parser */
639
argp.parser = parse_opt;
641
/* Open the configfile if available */
643
conffp = fopen(AFILE, "r");
645
conffp = fopen(argfile, "r");
475
647
if(conffp != NULL){
476
648
char *org_line = NULL;
477
649
char *p, *arg, *new_arg, *line;
480
651
const char whitespace_delims[] = " \r\t\f\v\n";
481
652
const char comment_delim[] = "#";
655
custom_argv = malloc(sizeof(char*) * 2);
656
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
661
custom_argv[0] = argv[0];
662
custom_argv[1] = NULL;
664
/* for each line in the config file, strip whitespace and ignore
484
667
sret = getline(&org_line, &size, conffp);
490
673
arg = strsep(&line, comment_delim);
491
674
while((p = strsep(&arg, whitespace_delims)) != NULL){
495
678
new_arg = strdup(p);
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
688
char **new_argv = realloc(custom_argv, sizeof(char *)
691
if(new_argv == NULL){
692
error(0, errno, "realloc");
693
exitstatus = EX_OSERR;
698
custom_argv = new_argv;
701
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
706
ret = fclose(conffp);
707
} while(ret == EOF and errno == EINTR);
709
error(0, errno, "fclose");
710
exitstatus = EX_IOERR;
506
715
/* Check for harmful errors and go to fallback. Other errors might
507
716
not affect opening plugins */
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
510
exitstatus = EXIT_FAILURE;
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
515
725
if(custom_argv != NULL){
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
519
if (ret == ARGP_ERR_UNKNOWN){
520
fprintf(stderr, "Unknown error while parsing arguments\n");
521
exitstatus = EXIT_FAILURE;
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;
744
/* 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;
527
764
for(plugin *p = plugin_list; p != NULL; p=p->next){
528
765
fprintf(stderr, "Plugin: %s has %d arguments\n",
530
767
for(char **a = p->argv; *a != NULL; a++){
531
768
fprintf(stderr, "\tArg: %s\n", *a);
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
534
771
for(char **a = p->environ; *a != NULL; a++){
535
772
fprintf(stderr, "\t%s\n", *a);
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 */
802
error(0, errno, "setgid");
540
804
ret = setuid(uid);
550
dir = opendir(plugindir);
552
perror("Could not open plugin dir");
553
exitstatus = EXIT_FAILURE;
557
/* Set the FD_CLOEXEC flag on the directory, if possible */
806
error(0, errno, "setuid");
809
/* Open plugin directory with close_on_exec flag */
559
int dir_fd = dirfd(dir);
561
ret = set_cloexec_flag(dir_fd);
563
perror("set_cloexec_flag");
564
exitstatus = EXIT_FAILURE;
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;
570
855
FD_ZERO(&rfds_all);
857
/* Read and execute any executable in the plugin directory*/
573
dirst = readdir(dir);
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
575
// All directory entries have been processed
863
/* All directory entries have been processed */
576
864
if(dirst == NULL){
579
exitstatus = EXIT_FAILURE;
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
687
1000
process, too. */
688
1001
if(p->environ[0] != NULL){
689
1002
for(char **e = environ; *e != NULL; e++){
690
char *copy = strdup(*e);
695
if(not add_environment(p, copy)){
696
perror("add_environment");
1003
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
705
exitstatus = EXIT_FAILURE;
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
1016
/* Ask OS to automatic close the pipe on exec */
708
1017
ret = set_cloexec_flag(pipefd[0]);
710
perror("set_cloexec_flag");
711
exitstatus = EXIT_FAILURE;
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
714
1023
ret = set_cloexec_flag(pipefd[1]);
716
perror("set_cloexec_flag");
717
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
720
1029
/* Block SIGCHLD until process is safely in process list */
721
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
723
perror("sigprocmask");
724
exitstatus = EXIT_FAILURE;
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
727
// Starting a new process to be watched
1038
/* Starting a new process to be watched */
1042
} while(pid == -1 and errno == EINTR);
731
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
735
1049
/* this is the child process */
736
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1052
error(0, errno, "sigaction");
741
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
743
perror("sigprocmask");
1057
error(0, errno, "sigprocmask");
747
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1063
error(0, errno, "dup2");
753
1067
if(dirfd(dir) < 0){
758
1072
if(p->environ[0] == NULL){
759
1073
if(execv(filename, p->argv) < 0){
1074
error(0, errno, "execv for %s", filename);
764
1078
if(execve(filename, p->argv, p->environ) < 0){
1079
error(0, errno, "execve for %s", filename);
1085
/* Parent process */
1086
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1089
plugin *new_plugin = getplugin(dirst->d_name);
1090
if(new_plugin == NULL){
1091
error(0, errno, "getplugin");
1092
ret = (int)(TEMP_FAILURE_RETRY
1093
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
779
perror("sigprocmask");
1096
error(0, errno, "sigprocmask");
781
exitstatus = EXIT_FAILURE;
1098
exitstatus = EX_OSERR;
785
*new_process = (struct process){ .pid = pid,
787
.next = process_list };
789
process_list = new_process;
1102
new_plugin->pid = pid;
1103
new_plugin->fd = pipefd[0];
790
1105
/* Unblock SIGCHLD so signal handler can be run if this process
791
1106
has already completed */
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1107
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1108
&sigchld_action.sa_mask,
794
perror("sigprocmask");
795
exitstatus = EXIT_FAILURE;
1111
error(0, errno, "sigprocmask");
1112
exitstatus = EX_OSERR;
799
FD_SET(new_process->fd, &rfds_all);
1116
#if defined (__GNUC__) and defined (__GLIBC__)
1117
#if not __GLIBC_PREREQ(2, 16)
1118
#pragma GCC diagnostic push
1119
#pragma GCC diagnostic ignored "-Wsign-conversion"
1122
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1123
-Wconversion in GNU libc
1125
#if defined (__GNUC__) and defined (__GLIBC__)
1126
#if not __GLIBC_PREREQ(2, 16)
1127
#pragma GCC diagnostic pop
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
1131
if(maxfd < new_plugin->fd){
1132
maxfd = new_plugin->fd;
807
free_plugin_list(plugin_list);
1136
TEMP_FAILURE_RETRY(closedir(dir));
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1138
free_plugin(getplugin(NULL));
1140
for(plugin *p = plugin_list; p != NULL; p = p->next){
1144
if(p->next == NULL){
1145
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1151
/* Main loop while running plugins exist */
819
1153
fd_set rfds = rfds_all;
820
1154
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
821
if (select_ret == -1){
823
exitstatus = EXIT_FAILURE;
1155
if(select_ret == -1 and errno != EINTR){
1156
error(0, errno, "select");
1157
exitstatus = EX_OSERR;
826
1160
/* OK, now either a process completed, or something can be read
827
1161
from one of them */
828
for(process *proc = process_list; proc ; proc = proc->next){
1162
for(plugin *proc = plugin_list; proc != NULL;){
829
1163
/* Is this process completely done? */
830
if(proc->eof and proc->completed){
1164
if(proc->completed and proc->eof){
831
1165
/* Only accept the plugin output if it exited cleanly */
832
1166
if(not WIFEXITED(proc->status)
833
1167
or WEXITSTATUS(proc->status) != 0){
834
1168
/* Bad exit by plugin */
836
1171
if(WIFEXITED(proc->status)){
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
1172
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1173
" status %d\n", proc->name,
1174
(intmax_t) (proc->pid),
839
1175
WEXITSTATUS(proc->status));
840
} else if(WIFSIGNALED(proc->status)) {
841
fprintf(stderr, "Plugin %u killed by signal %d\n",
842
(unsigned int) (proc->pid),
843
WTERMSIG(proc->status));
1176
} else if(WIFSIGNALED(proc->status)){
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1178
" signal %d: %s\n", proc->name,
1179
(intmax_t) (proc->pid),
1180
WTERMSIG(proc->status),
1181
strsignal(WTERMSIG(proc->status)));
844
1182
} else if(WCOREDUMP(proc->status)){
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
1183
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1184
" core\n", proc->name, (intmax_t) (proc->pid));
849
1188
/* Remove the plugin */
850
FD_CLR(proc->fd, &rfds_all);
1189
#if defined (__GNUC__) and defined (__GLIBC__)
1190
#if not __GLIBC_PREREQ(2, 16)
1191
#pragma GCC diagnostic push
1192
#pragma GCC diagnostic ignored "-Wsign-conversion"
1195
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1196
-Wconversion in GNU libc
1198
#if defined (__GNUC__) and defined (__GLIBC__)
1199
#if not __GLIBC_PREREQ(2, 16)
1200
#pragma GCC diagnostic pop
851
1204
/* Block signal while modifying process_list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1205
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1207
&sigchld_action.sa_mask,
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1210
error(0, errno, "sigprocmask");
1211
exitstatus = EX_OSERR;
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
866
p->next = proc->next;
1215
plugin *next_plugin = proc->next;
871
1219
/* We are done modifying process list, so unblock signal */
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1220
ret = (int)(TEMP_FAILURE_RETRY
1221
(sigprocmask(SIG_UNBLOCK,
1222
&sigchld_action.sa_mask, NULL)));
875
perror("sigprocmask");
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
1224
error(0, errno, "sigprocmask");
1225
exitstatus = EX_OSERR;
1229
if(plugin_list == NULL){
884
1236
/* This process exited nicely, so print its buffer */
886
1238
bool bret = print_out_password(proc->buffer,
887
1239
proc->buffer_length);
889
perror("print_out_password");
890
exitstatus = EXIT_FAILURE;
1241
error(0, errno, "print_out_password");
1242
exitstatus = EX_IOERR;
894
1247
/* This process has not completed. Does it have any output? */
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
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
896
1265
/* This process had nothing to say at this time */
899
1269
/* Before reading, make the process' data buffer large enough */
900
1270
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
901
proc->buffer = realloc(proc->buffer, proc->buffer_size
902
+ (size_t) BUFFER_SIZE);
903
if (proc->buffer == NULL){
905
exitstatus = EXIT_FAILURE;
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;
1278
proc->buffer = new_buffer;
908
1279
proc->buffer_size += BUFFER_SIZE;
910
1281
/* Read from the process */
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1282
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1284
+ proc->buffer_length,
914
1287
/* Read error from this process; ignore the error */
919
1293
proc->eof = true;
921
proc->buffer_length += (size_t) ret;
1295
proc->buffer_length += (size_t) sret;
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1303
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1304
and exitstatus != EX_OK)){
930
1305
/* Fallback if all plugins failed, none are found or an error
933
1308
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
934
1309
char *passwordbuffer = getpass("Password: ");
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1310
size_t len = strlen(passwordbuffer);
1311
/* Strip trailing newline */
1312
if(len > 0 and passwordbuffer[len-1] == '\n'){
1313
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1316
bret = print_out_password(passwordbuffer, len);
937
perror("print_out_password");
938
exitstatus = EXIT_FAILURE;
1318
error(0, errno, "print_out_password");
1319
exitstatus = EX_IOERR;
942
1323
/* Restore old signal handler */
943
1324
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
946
exitstatus = EXIT_FAILURE;
1326
error(0, errno, "sigaction");
1327
exitstatus = EX_OSERR;
949
1330
if(custom_argv != NULL){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1331
for(char **arg = custom_argv+1; *arg != NULL; arg++){
953
1334
free(custom_argv);
955
free_plugin_list(plugin_list);
957
1337
if(dir != NULL){
961
/* Free the process list and kill the processes */
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
1341
/* Kill the processes */
1342
for(plugin *p = plugin_list; p != NULL; p = p->next){
1345
ret = kill(p->pid, SIGTERM);
1346
if(ret == -1 and errno != ESRCH){
1347
/* Set-uid proccesses might not get closed */
1348
error(0, errno, "kill");
970
free(process_list->buffer);
974
1353
/* Wait for any remaining child processes to terminate */
976
1355
ret = wait(NULL);
977
1356
} while(ret >= 0);
978
1357
if(errno != ECHILD){
1358
error(0, errno, "wait");
982
1366
return exitstatus;