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));
179
*array = realloc(*array, sizeof(char *)
180
* (size_t) ((*len) + 2));
181
} while(*array == NULL and errno == EINTR);
151
182
/* Malloc check */
152
183
if(*array == NULL){
155
186
/* Make a copy of the new string */
156
char *copy = strdup(new);
190
} while(copy == NULL and errno == EINTR);
157
191
if(copy == NULL){
324
380
{ .name = "global-options", .key = 'g',
325
381
.arg = "OPTION[,OPTION[,...]]",
326
382
.doc = "Options passed to all plugins" },
327
{ .name = "global-envs", .key = 'e',
383
{ .name = "global-env", .key = 'G',
328
384
.arg = "VAR=value",
329
385
.doc = "Environment variable passed to all plugins" },
330
386
{ .name = "options-for", .key = 'o',
331
387
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
332
388
.doc = "Options passed only to specified plugin" },
333
{ .name = "envs-for", .key = 'f',
389
{ .name = "env-for", .key = 'E',
334
390
.arg = "PLUGIN:ENV=value",
335
391
.doc = "Environment variable passed to specified plugin" },
336
392
{ .name = "disable", .key = 'd',
338
394
.doc = "Disable a specific plugin", .group = 1 },
395
{ .name = "enable", .key = 'e',
397
.doc = "Enable a specific plugin", .group = 1 },
339
398
{ .name = "plugin-dir", .key = 128,
340
399
.arg = "DIRECTORY",
341
400
.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 },
401
{ .name = "config-file", .key = 129,
403
.doc = "Specify a different configuration file", .group = 2 },
404
{ .name = "userid", .key = 130,
405
.arg = "ID", .flags = 0,
406
.doc = "User ID the plugins will run as", .group = 3 },
407
{ .name = "groupid", .key = 131,
408
.arg = "ID", .flags = 0,
409
.doc = "Group ID the plugins will run as", .group = 3 },
410
{ .name = "debug", .key = 132,
411
.doc = "Debug mode", .group = 4 },
413
* These reproduce what we would get without ARGP_NO_HELP
415
{ .name = "help", .key = '?',
416
.doc = "Give this help list", .group = -1 },
417
{ .name = "usage", .key = -3,
418
.doc = "Give a short usage message", .group = -1 },
419
{ .name = "version", .key = 'V',
420
.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;
424
__attribute__((nonnull(3)))
425
error_t parse_opt(int key, char *arg, struct argp_state *state){
430
case 'g': /* --global-options */
433
while((plugin_option = strsep(&arg, ",")) != NULL){
434
if(not add_argument(getplugin(NULL), plugin_option)){
440
case 'G': /* --global-env */
441
add_environment(getplugin(NULL), arg, true);
443
case 'o': /* --options-for */
445
char *option_list = strchr(arg, ':');
446
if(option_list == NULL){
447
argp_error(state, "No colon in \"%s\"", arg);
454
argp_error(state, "Empty plugin name");
459
while((option = strsep(&option_list, ",")) != NULL){
460
if(not add_argument(getplugin(arg), option)){
466
case 'E': /* --env-for */
415
468
char *envdef = strchr(arg, ':');
416
469
if(envdef == NULL){
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
470
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);
477
argp_error(state, "Empty plugin name");
481
add_environment(getplugin(arg), envdef, true);
484
case 'd': /* --disable */
486
plugin *p = getplugin(arg);
492
case 'e': /* --enable */
494
plugin *p = getplugin(arg);
500
case 128: /* --plugin-dir */
502
plugindir = strdup(arg);
504
case 129: /* --config-file */
505
/* This is already done by parse_opt_config_file() */
507
case 130: /* --userid */
508
tmp_id = strtoimax(arg, &tmp, 10);
509
if(errno != 0 or tmp == arg or *tmp != '\0'
510
or tmp_id != (uid_t)tmp_id){
511
argp_error(state, "Bad user ID number: \"%s\", using %"
512
PRIdMAX, arg, (intmax_t)uid);
517
case 131: /* --groupid */
518
tmp_id = strtoimax(arg, &tmp, 10);
519
if(errno != 0 or tmp == arg or *tmp != '\0'
520
or tmp_id != (gid_t)tmp_id){
521
argp_error(state, "Bad group ID number: \"%s\", using %"
522
PRIdMAX, arg, (intmax_t)gid);
527
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]",
531
* These reproduce what we would get without ARGP_NO_HELP
533
case '?': /* --help */
534
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
535
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
536
case -3: /* --usage */
537
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
538
argp_state_help(state, state->out_stream,
539
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
540
case 'V': /* --version */
541
fprintf(state->out_stream, "%s\n", argp_program_version);
545
* When adding more options before this line, remember to also add a
546
* "case" to the "parse_opt_config_file" function below.
549
/* Cryptsetup always passes an argument, which is an empty
550
string if "none" was specified in /etc/crypttab. So if
551
argument was empty, we ignore it silently. */
556
return ARGP_ERR_UNKNOWN;
558
return errno; /* Set to 0 at start */
561
/* This option parser is the same as parse_opt() above, except it
562
ignores everything but the --config-file option. */
563
error_t parse_opt_config_file(int key, char *arg,
564
__attribute__((unused))
565
struct argp_state *state){
568
case 'g': /* --global-options */
569
case 'G': /* --global-env */
570
case 'o': /* --options-for */
571
case 'E': /* --env-for */
572
case 'd': /* --disable */
573
case 'e': /* --enable */
574
case 128: /* --plugin-dir */
576
case 129: /* --config-file */
578
argfile = strdup(arg);
580
case 130: /* --userid */
581
case 131: /* --groupid */
582
case 132: /* --debug */
583
case '?': /* --help */
584
case -3: /* --usage */
585
case 'V': /* --version */
589
return ARGP_ERR_UNKNOWN;
594
struct argp argp = { .options = options,
595
.parser = parse_opt_config_file,
465
597
.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");
599
/* Parse using parse_opt_config_file() in order to get the custom
600
config file location, if any. */
601
ret = argp_parse(&argp, argc, argv,
602
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
610
error(0, errno, "argp_parse");
611
exitstatus = EX_OSERR;
614
exitstatus = EX_USAGE;
618
/* Reset to the normal argument parser */
619
argp.parser = parse_opt;
621
/* Open the configfile if available */
623
conffp = fopen(AFILE, "r");
625
conffp = fopen(argfile, "r");
475
627
if(conffp != NULL){
476
628
char *org_line = NULL;
477
629
char *p, *arg, *new_arg, *line;
480
631
const char whitespace_delims[] = " \r\t\f\v\n";
481
632
const char comment_delim[] = "#";
635
custom_argv = malloc(sizeof(char*) * 2);
636
if(custom_argv == NULL){
637
error(0, errno, "malloc");
638
exitstatus = EX_OSERR;
641
custom_argv[0] = argv[0];
642
custom_argv[1] = NULL;
644
/* for each line in the config file, strip whitespace and ignore
484
647
sret = getline(&org_line, &size, conffp);
490
653
arg = strsep(&line, comment_delim);
491
654
while((p = strsep(&arg, whitespace_delims)) != NULL){
495
658
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;
660
error(0, errno, "strdup");
661
exitstatus = EX_OSERR;
667
custom_argv = realloc(custom_argv, sizeof(char *)
668
* ((unsigned int) custom_argc + 1));
669
if(custom_argv == NULL){
670
error(0, errno, "realloc");
671
exitstatus = EX_OSERR;
675
custom_argv[custom_argc-1] = new_arg;
676
custom_argv[custom_argc] = NULL;
680
ret = fclose(conffp);
681
} while(ret == EOF and errno == EINTR);
683
error(0, errno, "fclose");
684
exitstatus = EX_IOERR;
506
689
/* Check for harmful errors and go to fallback. Other errors might
507
690
not affect opening plugins */
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
510
exitstatus = EXIT_FAILURE;
691
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
692
error(0, errno, "fopen");
693
exitstatus = EX_OSERR;
697
/* If there were any arguments from the configuration file, pass
698
them to parser as command line arguments */
515
699
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;
700
ret = argp_parse(&argp, custom_argc, custom_argv,
701
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
709
error(0, errno, "argp_parse");
710
exitstatus = EX_OSERR;
713
exitstatus = EX_CONFIG;
718
/* Parse actual command line arguments, to let them override the
720
ret = argp_parse(&argp, argc, argv,
721
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
729
error(0, errno, "argp_parse");
730
exitstatus = EX_OSERR;
733
exitstatus = EX_USAGE;
527
738
for(plugin *p = plugin_list; p != NULL; p=p->next){
528
739
fprintf(stderr, "Plugin: %s has %d arguments\n",
530
741
for(char **a = p->argv; *a != NULL; a++){
531
742
fprintf(stderr, "\tArg: %s\n", *a);
533
fprintf(stderr, "...and %u environment variables\n", p->envc);
744
fprintf(stderr, "...and %d environment variables\n", p->envc);
534
745
for(char **a = p->environ; *a != NULL; a++){
535
746
fprintf(stderr, "\t%s\n", *a);
752
/* Work around Debian bug #633582:
753
<http://bugs.debian.org/633582> */
754
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
755
if(plugindir_fd == -1){
756
error(0, errno, "open");
758
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
760
error(0, errno, "fstat");
762
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
763
ret = fchown(plugindir_fd, uid, gid);
765
error(0, errno, "fchown");
769
TEMP_FAILURE_RETRY(close(plugindir_fd));
773
/* Lower permissions */
776
error(0, errno, "setgid");
540
778
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 */
780
error(0, errno, "setuid");
783
/* 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;
786
if(plugindir == NULL){
787
dir_fd = open(PDIR, O_RDONLY |
790
#else /* not O_CLOEXEC */
792
#endif /* not O_CLOEXEC */
795
dir_fd = open(plugindir, O_RDONLY |
798
#else /* not O_CLOEXEC */
800
#endif /* not O_CLOEXEC */
804
error(0, errno, "Could not open plugin dir");
805
exitstatus = EX_UNAVAILABLE;
810
/* Set the FD_CLOEXEC flag on the directory */
811
ret = set_cloexec_flag(dir_fd);
813
error(0, errno, "set_cloexec_flag");
814
TEMP_FAILURE_RETRY(close(dir_fd));
815
exitstatus = EX_OSERR;
818
#endif /* O_CLOEXEC */
820
dir = fdopendir(dir_fd);
822
error(0, errno, "Could not open plugin dir");
823
TEMP_FAILURE_RETRY(close(dir_fd));
824
exitstatus = EX_OSERR;
570
829
FD_ZERO(&rfds_all);
831
/* Read and execute any executable in the plugin directory*/
573
dirst = readdir(dir);
834
dirst = readdir(dir);
835
} while(dirst == NULL and errno == EINTR);
575
// All directory entries have been processed
837
/* All directory entries have been processed */
576
838
if(dirst == NULL){
579
exitstatus = EXIT_FAILURE;
840
error(0, errno, "readdir");
841
exitstatus = EX_IOERR;
688
959
if(p->environ[0] != NULL){
689
960
for(char **e = environ; *e != NULL; e++){
690
char *copy = strdup(*e);
695
if(not add_environment(p, copy)){
696
perror("add_environment");
961
if(not add_environment(p, *e, false)){
962
error(0, errno, "add_environment");
705
exitstatus = EXIT_FAILURE;
968
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
970
error(0, errno, "pipe");
971
exitstatus = EX_OSERR;
974
/* Ask OS to automatic close the pipe on exec */
708
975
ret = set_cloexec_flag(pipefd[0]);
710
perror("set_cloexec_flag");
711
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
714
981
ret = set_cloexec_flag(pipefd[1]);
716
perror("set_cloexec_flag");
717
exitstatus = EXIT_FAILURE;
983
error(0, errno, "set_cloexec_flag");
984
exitstatus = EX_OSERR;
720
987
/* Block SIGCHLD until process is safely in process list */
721
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
988
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
989
&sigchld_action.sa_mask,
723
perror("sigprocmask");
724
exitstatus = EXIT_FAILURE;
992
error(0, errno, "sigprocmask");
993
exitstatus = EX_OSERR;
727
// Starting a new process to be watched
996
/* Starting a new process to be watched */
1000
} while(pid == -1 and errno == EINTR);
731
exitstatus = EXIT_FAILURE;
1002
error(0, errno, "fork");
1003
exitstatus = EX_OSERR;
735
1007
/* this is the child process */
736
1008
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1010
error(0, errno, "sigaction");
741
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1013
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
743
perror("sigprocmask");
1015
error(0, errno, "sigprocmask");
747
1019
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1021
error(0, errno, "dup2");
753
1025
if(dirfd(dir) < 0){
758
1030
if(p->environ[0] == NULL){
759
1031
if(execv(filename, p->argv) < 0){
1032
error(0, errno, "execv for %s", filename);
764
1036
if(execve(filename, p->argv, p->environ) < 0){
1037
error(0, errno, "execve for %s", filename);
1043
/* Parent process */
1044
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);
1047
plugin *new_plugin = getplugin(dirst->d_name);
1048
if(new_plugin == NULL){
1049
error(0, errno, "getplugin");
1050
ret = (int)(TEMP_FAILURE_RETRY
1051
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
779
perror("sigprocmask");
1054
error(0, errno, "sigprocmask");
781
exitstatus = EXIT_FAILURE;
1056
exitstatus = EX_OSERR;
785
*new_process = (struct process){ .pid = pid,
787
.next = process_list };
789
process_list = new_process;
1060
new_plugin->pid = pid;
1061
new_plugin->fd = pipefd[0];
790
1063
/* Unblock SIGCHLD so signal handler can be run if this process
791
1064
has already completed */
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1065
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1066
&sigchld_action.sa_mask,
794
perror("sigprocmask");
795
exitstatus = EXIT_FAILURE;
1069
error(0, errno, "sigprocmask");
1070
exitstatus = EX_OSERR;
799
FD_SET(new_process->fd, &rfds_all);
1074
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
1077
if(maxfd < new_plugin->fd){
1078
maxfd = new_plugin->fd;
807
free_plugin_list(plugin_list);
1082
TEMP_FAILURE_RETRY(closedir(dir));
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1084
free_plugin(getplugin(NULL));
1086
for(plugin *p = plugin_list; p != NULL; p = p->next){
1090
if(p->next == NULL){
1091
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1097
/* Main loop while running plugins exist */
819
1099
fd_set rfds = rfds_all;
820
1100
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
821
if (select_ret == -1){
823
exitstatus = EXIT_FAILURE;
1101
if(select_ret == -1 and errno != EINTR){
1102
error(0, errno, "select");
1103
exitstatus = EX_OSERR;
826
1106
/* OK, now either a process completed, or something can be read
827
1107
from one of them */
828
for(process *proc = process_list; proc ; proc = proc->next){
1108
for(plugin *proc = plugin_list; proc != NULL;){
829
1109
/* Is this process completely done? */
830
if(proc->eof and proc->completed){
1110
if(proc->completed and proc->eof){
831
1111
/* Only accept the plugin output if it exited cleanly */
832
1112
if(not WIFEXITED(proc->status)
833
1113
or WEXITSTATUS(proc->status) != 0){
834
1114
/* Bad exit by plugin */
836
1117
if(WIFEXITED(proc->status)){
837
fprintf(stderr, "Plugin %u exited with status %d\n",
838
(unsigned int) (proc->pid),
1118
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1119
" status %d\n", proc->name,
1120
(intmax_t) (proc->pid),
839
1121
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));
1122
} else if(WIFSIGNALED(proc->status)){
1123
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1124
" signal %d: %s\n", proc->name,
1125
(intmax_t) (proc->pid),
1126
WTERMSIG(proc->status),
1127
strsignal(WTERMSIG(proc->status)));
844
1128
} else if(WCOREDUMP(proc->status)){
845
fprintf(stderr, "Plugin %d dumped core\n",
846
(unsigned int) (proc->pid));
1129
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1130
" core\n", proc->name, (intmax_t) (proc->pid));
849
1134
/* Remove the plugin */
850
FD_CLR(proc->fd, &rfds_all);
1135
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
851
1138
/* Block signal while modifying process_list */
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1139
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1141
&sigchld_action.sa_mask,
854
perror("sigprocmask");
855
exitstatus = EXIT_FAILURE;
1144
error(0, errno, "sigprocmask");
1145
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;
1149
plugin *next_plugin = proc->next;
871
1153
/* We are done modifying process list, so unblock signal */
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1154
ret = (int)(TEMP_FAILURE_RETRY
1155
(sigprocmask(SIG_UNBLOCK,
1156
&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
1158
error(0, errno, "sigprocmask");
1159
exitstatus = EX_OSERR;
1163
if(plugin_list == NULL){
884
1170
/* This process exited nicely, so print its buffer */
886
1172
bool bret = print_out_password(proc->buffer,
887
1173
proc->buffer_length);
889
perror("print_out_password");
890
exitstatus = EXIT_FAILURE;
1175
error(0, errno, "print_out_password");
1176
exitstatus = EX_IOERR;
894
1181
/* This process has not completed. Does it have any output? */
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1182
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
896
1185
/* This process had nothing to say at this time */
899
1189
/* Before reading, make the process' data buffer large enough */
900
1190
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
901
1191
proc->buffer = realloc(proc->buffer, proc->buffer_size
902
1192
+ (size_t) BUFFER_SIZE);
903
if (proc->buffer == NULL){
905
exitstatus = EXIT_FAILURE;
1193
if(proc->buffer == NULL){
1194
error(0, errno, "malloc");
1195
exitstatus = EX_OSERR;
908
1198
proc->buffer_size += BUFFER_SIZE;
910
1200
/* Read from the process */
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1201
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1203
+ proc->buffer_length,
914
1206
/* Read error from this process; ignore the error */
919
1212
proc->eof = true;
921
proc->buffer_length += (size_t) ret;
1214
proc->buffer_length += (size_t) sret;
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1222
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1223
and exitstatus != EX_OK)){
930
1224
/* Fallback if all plugins failed, none are found or an error
933
1227
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
934
1228
char *passwordbuffer = getpass("Password: ");
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1229
size_t len = strlen(passwordbuffer);
1230
/* Strip trailing newline */
1231
if(len > 0 and passwordbuffer[len-1] == '\n'){
1232
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1235
bret = print_out_password(passwordbuffer, len);
937
perror("print_out_password");
938
exitstatus = EXIT_FAILURE;
1237
error(0, errno, "print_out_password");
1238
exitstatus = EX_IOERR;
942
1242
/* Restore old signal handler */
943
1243
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
946
exitstatus = EXIT_FAILURE;
1245
error(0, errno, "sigaction");
1246
exitstatus = EX_OSERR;
949
1249
if(custom_argv != NULL){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1250
for(char **arg = custom_argv+1; *arg != NULL; arg++){
953
1253
free(custom_argv);
955
free_plugin_list(plugin_list);
957
1256
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 */
1260
/* Kill the processes */
1261
for(plugin *p = plugin_list; p != NULL; p = p->next){
1264
ret = kill(p->pid, SIGTERM);
1265
if(ret == -1 and errno != ESRCH){
1266
/* Set-uid proccesses might not get closed */
1267
error(0, errno, "kill");
970
free(process_list->buffer);
974
1272
/* Wait for any remaining child processes to terminate */
976
1274
ret = wait(NULL);
977
1275
} while(ret >= 0);
978
1276
if(errno != ECHILD){
1277
error(0, errno, "wait");
982
1285
return exitstatus;