1
#include <stdio.h> /* popen, fileno */
2
#include <iso646.h> /* and, or, not */
3
#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
4
WIFEXITED, WEXITSTATUS, wait */
5
#include <sys/wait.h> /* wait */
6
#include <dirent.h> /* DIR, opendir */
7
#include <sys/stat.h> /* stat, struct stat */
8
#include <unistd.h> /* stat, struct stat, chdir */
9
#include <stdlib.h> /* EXIT_FAILURE */
10
#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET, FD_ISSET */
11
#include <string.h> /* strlen, strcpy, strcat */
12
#include <stdbool.h> /* true */
13
#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
14
#include <errno.h> /* errno */
18
typedef struct process{
1
/* -*- coding: utf-8 -*- */
3
* Mandos plugin runner - Run Mandos plugins
5
* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
7
* This program is free software: you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License as
9
* published by the Free Software Foundation, either version 3 of the
10
* License, or (at your option) any later version.
12
* This program is distributed in the hope that it will be useful, but
13
* WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* General Public License for more details.
17
* You should have received a copy of the GNU General Public License
18
* along with this program. If not, see
19
* <http://www.gnu.org/licenses/>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
29
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, fileno(), fprintf(),
31
stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
33
stat, waitpid(), WIFEXITED(),
34
WEXITSTATUS(), wait(), pid_t,
35
uid_t, gid_t, getuid(), getgid(),
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
fcntl(), setuid(), setgid(),
47
F_GETFD, F_SETFD, FD_CLOEXEC,
48
access(), pipe(), fork(), close()
49
dup2(), STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
55
#include <errno.h> /* errno */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG,
61
#include <signal.h> /* struct sigaction, sigemptyset(),
62
sigaddset(), sigaction(),
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
65
#include <errno.h> /* errno, EBADF */
67
#define BUFFER_SIZE 256
69
#define PDIR "/lib/mandos/plugins.d"
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
const char *argp_program_version = "plugin-runner " VERSION;
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
75
typedef struct plugin{
76
char *name; /* can be NULL or any plugin name */
83
/* Variables used for running processes*/
27
#define BUFFER_SIZE 256
90
volatile bool completed;
95
static plugin *plugin_list = NULL;
97
/* Gets an existing plugin based on name,
98
or if none is found, creates a new one */
99
static plugin *getplugin(char *name){
100
/* Check for exiting plugin with that name */
101
for (plugin *p = plugin_list; p != NULL; p = p->next){
102
if ((p->name == name)
103
or (p->name and name and (strcmp(p->name, name) == 0))){
107
/* Create a new plugin */
108
plugin *new_plugin = malloc(sizeof(plugin));
109
if (new_plugin == NULL){
112
char *copy_name = NULL;
114
copy_name = strdup(name);
115
if(copy_name == NULL){
120
*new_plugin = (plugin) { .name = copy_name,
123
.next = plugin_list };
125
new_plugin->argv = malloc(sizeof(char *) * 2);
126
if (new_plugin->argv == NULL){
131
new_plugin->argv[0] = copy_name;
132
new_plugin->argv[1] = NULL;
134
new_plugin->environ = malloc(sizeof(char *));
135
if(new_plugin->environ == NULL){
137
free(new_plugin->argv);
141
new_plugin->environ[0] = NULL;
143
/* Append the new plugin to the list */
144
plugin_list = new_plugin;
148
/* Helper function for add_argument and add_environment */
149
static bool add_to_char_array(const char *new, char ***array,
151
/* Resize the pointed-to array to hold one more pointer */
152
*array = realloc(*array, sizeof(char *)
153
* (size_t) ((*len) + 2));
158
/* Make a copy of the new string */
159
char *copy = strdup(new);
163
/* Insert the copy */
164
(*array)[*len] = copy;
166
/* Add a new terminating NULL pointer to the last element */
167
(*array)[*len] = NULL;
171
/* Add to a plugin's argument vector */
172
static bool add_argument(plugin *p, const char *arg){
176
return add_to_char_array(arg, &(p->argv), &(p->argc));
179
/* Add to a plugin's environment */
180
static bool add_environment(plugin *p, const char *def, bool replace){
184
/* namelen = length of name of environment variable */
185
size_t namelen = (size_t)(strchrnul(def, '=') - def);
186
/* Search for this environment variable */
187
for(char **e = p->environ; *e != NULL; e++){
188
if(strncmp(*e, def, namelen + 1) == 0){
189
/* It already exists */
191
char *new = realloc(*e, strlen(def) + 1);
201
return add_to_char_array(def, &(p->environ), &(p->envc));
205
* Based on the example in the GNU LibC manual chapter 13.13 "File
207
* *Note File Descriptor Flags:(libc)Descriptor Flags.
209
static int set_cloexec_flag(int fd){
210
int ret = fcntl(fd, F_GETFD, 0);
211
/* If reading the flags failed, return error indication now. */
215
/* Store modified flag word in the descriptor. */
216
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
220
/* Mark processes as completed when they exit, and save their exit
222
static void handle_sigchld(__attribute__((unused)) int sig){
224
plugin *proc = plugin_list;
226
pid_t pid = waitpid(-1, &status, WNOHANG);
228
/* Only still running child processes */
232
if (errno != ECHILD){
235
/* No child processes */
239
/* A child exited, find it in process_list */
240
while(proc != NULL and proc->pid != pid){
244
/* Process not found in process list */
247
proc->status = status;
248
proc->completed = true;
252
/* Prints out a password to stdout */
253
static bool print_out_password(const char *buffer, size_t length){
255
for(size_t written = 0; written < length; written += (size_t)ret){
256
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
265
/* Removes and free a plugin from the plugin list */
266
static void free_plugin(plugin *plugin_node){
268
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
271
free(plugin_node->argv);
272
for(char **env = plugin_node->environ; *env != NULL; env++){
275
free(plugin_node->environ);
276
free(plugin_node->buffer);
278
/* Removes the plugin from the singly-linked list */
279
if(plugin_node == plugin_list){
280
/* First one - simple */
281
plugin_list = plugin_list->next;
283
/* Second one or later */
284
for(plugin *p = plugin_list; p != NULL; p = p->next){
285
if(p->next == plugin_node){
286
p->next = plugin_node->next;
295
static void free_plugin_list(void){
296
while(plugin_list != NULL){
297
free_plugin(plugin_list);
29
301
int main(int argc, char *argv[]){
30
char plugindir[] = "plugins.d";
31
size_t d_name_len, plugindir_len = sizeof(plugindir)-1;
302
char *plugindir = NULL;
303
char *argfile = NULL;
33
307
struct dirent *dirst;
36
310
int ret, maxfd = 0;
37
process *process_list = NULL;
39
dir = opendir(plugindir);
314
int exitstatus = EXIT_SUCCESS;
315
struct sigaction old_sigchld_action;
316
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
317
.sa_flags = SA_NOCLDSTOP };
318
char **custom_argv = NULL;
321
/* Establish a signal handler */
322
sigemptyset(&sigchld_action.sa_mask);
323
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
326
exitstatus = EXIT_FAILURE;
329
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
332
exitstatus = EXIT_FAILURE;
336
/* The options we understand. */
337
struct argp_option options[] = {
338
{ .name = "global-options", .key = 'g',
339
.arg = "OPTION[,OPTION[,...]]",
340
.doc = "Options passed to all plugins" },
341
{ .name = "global-env", .key = 'G',
343
.doc = "Environment variable passed to all plugins" },
344
{ .name = "options-for", .key = 'o',
345
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
346
.doc = "Options passed only to specified plugin" },
347
{ .name = "env-for", .key = 'E',
348
.arg = "PLUGIN:ENV=value",
349
.doc = "Environment variable passed to specified plugin" },
350
{ .name = "disable", .key = 'd',
352
.doc = "Disable a specific plugin", .group = 1 },
353
{ .name = "enable", .key = 'e',
355
.doc = "Enable a specific plugin", .group = 1 },
356
{ .name = "plugin-dir", .key = 128,
358
.doc = "Specify a different plugin directory", .group = 2 },
359
{ .name = "config-file", .key = 129,
361
.doc = "Specify a different configuration file", .group = 2 },
362
{ .name = "userid", .key = 130,
363
.arg = "ID", .flags = 0,
364
.doc = "User ID the plugins will run as", .group = 3 },
365
{ .name = "groupid", .key = 131,
366
.arg = "ID", .flags = 0,
367
.doc = "Group ID the plugins will run as", .group = 3 },
368
{ .name = "debug", .key = 132,
369
.doc = "Debug mode", .group = 4 },
373
error_t parse_opt (int key, char *arg, __attribute__((unused))
374
struct argp_state *state) {
376
case 'g': /* --global-options */
379
while((p = strsep(&arg, ",")) != NULL){
383
if(not add_argument(getplugin(NULL), p)){
384
perror("add_argument");
385
return ARGP_ERR_UNKNOWN;
390
case 'G': /* --global-env */
394
if(not add_environment(getplugin(NULL), arg, true)){
395
perror("add_environment");
398
case 'o': /* --options-for */
400
char *p_name = strsep(&arg, ":");
401
if(p_name[0] == '\0' or arg == NULL){
404
char *opt = strsep(&arg, ":");
405
if(opt[0] == '\0' or opt == NULL){
409
while((p = strsep(&opt, ",")) != NULL){
413
if(not add_argument(getplugin(p_name), p)){
414
perror("add_argument");
415
return ARGP_ERR_UNKNOWN;
420
case 'E': /* --env-for */
425
char *envdef = strchr(arg, ':');
430
if(not add_environment(getplugin(arg), envdef+1, true)){
431
perror("add_environment");
435
case 'd': /* --disable */
437
plugin *p = getplugin(arg);
439
return ARGP_ERR_UNKNOWN;
444
case 'e': /* --enable */
446
plugin *p = getplugin(arg);
448
return ARGP_ERR_UNKNOWN;
453
case 128: /* --plugin-dir */
455
plugindir = strdup(arg);
456
if(plugindir == NULL){
460
case 129: /* --config-file */
461
/* This is already done by parse_opt_config_file() */
463
case 130: /* --userid */
464
uid = (uid_t)strtol(arg, NULL, 10);
466
case 131: /* --groupid */
467
gid = (gid_t)strtol(arg, NULL, 10);
469
case 132: /* --debug */
473
/* Cryptsetup always passes an argument, which is an empty
474
string if "none" was specified in /etc/crypttab. So if
475
argument was empty, we ignore it silently. */
477
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
483
return ARGP_ERR_UNKNOWN;
488
/* This option parser is the same as parse_opt() above, except it
489
ignores everything but the --config-file option. */
490
error_t parse_opt_config_file (int key, char *arg,
491
__attribute__((unused))
492
struct argp_state *state) {
494
case 'g': /* --global-options */
495
case 'G': /* --global-env */
496
case 'o': /* --options-for */
497
case 'E': /* --env-for */
498
case 'd': /* --disable */
499
case 'e': /* --enable */
500
case 128: /* --plugin-dir */
502
case 129: /* --config-file */
504
argfile = strdup(arg);
509
case 130: /* --userid */
510
case 131: /* --groupid */
511
case 132: /* --debug */
516
return ARGP_ERR_UNKNOWN;
521
struct argp argp = { .options = options,
522
.parser = parse_opt_config_file,
524
.doc = "Mandos plugin runner -- Run plugins" };
526
/* Parse using the parse_opt_config_file in order to get the custom
527
config file location, if any. */
528
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
529
if (ret == ARGP_ERR_UNKNOWN){
530
fprintf(stderr, "Unknown error while parsing arguments\n");
531
exitstatus = EXIT_FAILURE;
535
/* Reset to the normal argument parser */
536
argp.parser = parse_opt;
538
/* Open the configfile if available */
539
if (argfile == NULL){
540
conffp = fopen(AFILE, "r");
542
conffp = fopen(argfile, "r");
545
char *org_line = NULL;
546
char *p, *arg, *new_arg, *line;
549
const char whitespace_delims[] = " \r\t\f\v\n";
550
const char comment_delim[] = "#";
553
custom_argv = malloc(sizeof(char*) * 2);
554
if(custom_argv == NULL){
556
exitstatus = EXIT_FAILURE;
559
custom_argv[0] = argv[0];
560
custom_argv[1] = NULL;
562
/* for each line in the config file, strip whitespace and ignore
565
sret = getline(&org_line, &size, conffp);
571
arg = strsep(&line, comment_delim);
572
while((p = strsep(&arg, whitespace_delims)) != NULL){
579
exitstatus = EXIT_FAILURE;
585
custom_argv = realloc(custom_argv, sizeof(char *)
586
* ((unsigned int) custom_argc + 1));
587
if(custom_argv == NULL){
589
exitstatus = EXIT_FAILURE;
593
custom_argv[custom_argc-1] = new_arg;
594
custom_argv[custom_argc] = NULL;
599
/* Check for harmful errors and go to fallback. Other errors might
600
not affect opening plugins */
601
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
603
exitstatus = EXIT_FAILURE;
607
/* If there was any arguments from configuration file,
608
pass them to parser as command arguments */
609
if(custom_argv != NULL){
610
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
612
if (ret == ARGP_ERR_UNKNOWN){
613
fprintf(stderr, "Unknown error while parsing arguments\n");
614
exitstatus = EXIT_FAILURE;
619
/* Parse actual command line arguments, to let them override the
621
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
622
if (ret == ARGP_ERR_UNKNOWN){
623
fprintf(stderr, "Unknown error while parsing arguments\n");
624
exitstatus = EXIT_FAILURE;
629
for(plugin *p = plugin_list; p != NULL; p=p->next){
630
fprintf(stderr, "Plugin: %s has %d arguments\n",
631
p->name ? p->name : "Global", p->argc - 1);
632
for(char **a = p->argv; *a != NULL; a++){
633
fprintf(stderr, "\tArg: %s\n", *a);
635
fprintf(stderr, "...and %u environment variables\n", p->envc);
636
for(char **a = p->environ; *a != NULL; a++){
637
fprintf(stderr, "\t%s\n", *a);
642
/* Strip permissions down to nobody */
652
if (plugindir == NULL){
655
dir = opendir(plugindir);
42
fprintf(stderr, "Can not open directory\n");
659
perror("Could not open plugin dir");
660
exitstatus = EXIT_FAILURE;
664
/* Set the FD_CLOEXEC flag on the directory, if possible */
666
int dir_fd = dirfd(dir);
668
ret = set_cloexec_flag(dir_fd);
670
perror("set_cloexec_flag");
671
exitstatus = EXIT_FAILURE;
679
/* Read and execute any executable in the plugin directory*/
49
681
dirst = readdir(dir);
51
// All directory entries have been processed
683
/* All directory entries have been processed */
52
684
if(dirst == NULL){
687
exitstatus = EXIT_FAILURE;
56
693
d_name_len = strlen(dirst->d_name);
58
// Ignore dotfiles and backup files
59
if (dirst->d_name[0] == '.'
60
or dirst->d_name[d_name_len - 1] == '~'){
64
char *filename = malloc(d_name_len + plugindir_len + 1);
65
strcpy(filename, plugindir);
66
strcat(filename, "/");
67
strcat(filename, dirst->d_name);
71
if (S_ISREG(st.st_mode) and (access(filename, X_OK) == 0)){
72
// Starting a new process to be watched
73
process *new_process = malloc(sizeof(process));
76
new_process->pid = fork();
77
if(new_process->pid == 0){
78
/* this is the child process */
695
/* Ignore dotfiles, backup files and other junk */
697
bool bad_name = false;
699
const char const *bad_prefixes[] = { ".", "#", NULL };
701
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
704
".dpkg-divert", NULL };
705
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
706
size_t pre_len = strlen(*pre);
707
if((d_name_len >= pre_len)
708
and strncmp((dirst->d_name), *pre, pre_len) == 0){
710
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
711
" with bad prefix %s\n", dirst->d_name, *pre);
720
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
721
size_t suf_len = strlen(*suf);
722
if((d_name_len >= suf_len)
723
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
726
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
727
" with bad suffix %s\n", dirst->d_name, *suf);
740
if(plugindir == NULL){
741
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
743
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
750
ret = stat(filename, &st);
757
/* Ignore non-executable files */
758
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
760
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
761
" with bad type or mode\n", filename);
767
plugin *p = getplugin(dirst->d_name);
775
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
782
/* Add global arguments to argument list for this plugin */
783
plugin *g = getplugin(NULL);
785
for(char **a = g->argv + 1; *a != NULL; a++){
786
if(not add_argument(p, *a)){
787
perror("add_argument");
790
/* Add global environment variables */
791
for(char **e = g->environ; *e != NULL; e++){
792
if(not add_environment(p, *e, false)){
793
perror("add_environment");
798
/* If this plugin has any environment variables, we will call
799
using execve and need to duplicate the environment from this
801
if(p->environ[0] != NULL){
802
for(char **e = environ; *e != NULL; e++){
803
if(not add_environment(p, *e, false)){
804
perror("add_environment");
813
exitstatus = EXIT_FAILURE;
816
/* Ask OS to automatic close the pipe on exec */
817
ret = set_cloexec_flag(pipefd[0]);
819
perror("set_cloexec_flag");
820
exitstatus = EXIT_FAILURE;
823
ret = set_cloexec_flag(pipefd[1]);
825
perror("set_cloexec_flag");
826
exitstatus = EXIT_FAILURE;
829
/* Block SIGCHLD until process is safely in process list */
830
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
832
perror("sigprocmask");
833
exitstatus = EXIT_FAILURE;
836
/* Starting a new process to be watched */
840
exitstatus = EXIT_FAILURE;
844
/* this is the child process */
845
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
850
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
852
perror("sigprocmask");
856
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
863
/* If dir has no file descriptor, we could not set FD_CLOEXEC
864
above and must now close it manually here. */
80
close(pipefd[0]); /* close unused read end of pipe */
81
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
82
/* create a new modified argument list */
83
char **new_argv = malloc(sizeof(char *) * argc + 1);
84
new_argv[0] = filename;
85
for(int i = 1; i < argc; i++){
86
new_argv[i] = argv[i];
88
new_argv[argc] = NULL;
89
if(execv(filename, new_argv) < 0){
96
close(pipefd[1]); /* close unused write end of pipe */
97
new_process->fd = pipefd[0];
98
new_process->buffer = malloc(BUFFER_SIZE);
99
if (new_process->buffer == NULL){
103
new_process->buffer_size = BUFFER_SIZE;
104
new_process->buffer_length = 0;
105
FD_SET(new_process->fd, &rfds_orig);
107
if (maxfd < new_process->fd){
108
maxfd = new_process->fd;
112
new_process->next = process_list;
113
process_list = new_process;
867
if(p->environ[0] == NULL){
868
if(execv(filename, p->argv) < 0){
873
if(execve(filename, p->argv, p->environ) < 0){
881
close(pipefd[1]); /* Close unused write end of pipe */
883
plugin *new_plugin = getplugin(dirst->d_name);
884
if (new_plugin == NULL){
886
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
888
perror("sigprocmask");
890
exitstatus = EXIT_FAILURE;
894
new_plugin->pid = pid;
895
new_plugin->fd = pipefd[0];
897
/* Unblock SIGCHLD so signal handler can be run if this process
898
has already completed */
899
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
901
perror("sigprocmask");
902
exitstatus = EXIT_FAILURE;
906
FD_SET(new_plugin->fd, &rfds_all);
908
if (maxfd < new_plugin->fd){
909
maxfd = new_plugin->fd;
119
if (process_list != NULL){
121
fd_set rfds = rfds_orig;
122
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
123
if (select_ret == -1){
127
for(process *process_itr = process_list; process_itr != NULL;
128
process_itr = process_itr->next){
129
if(FD_ISSET(process_itr->fd, &rfds)){
130
if(process_itr->buffer_length + BUFFER_SIZE
131
> process_itr->buffer_size){
132
process_itr->buffer = realloc(process_itr->buffer,
133
process_itr->buffer_size
135
if (process_itr->buffer == NULL){
139
process_itr->buffer_size += BUFFER_SIZE;
141
ret = read(process_itr->fd, process_itr->buffer
142
+ process_itr->buffer_length, BUFFER_SIZE);
143
process_itr->buffer_length+=ret;
146
/* wait for process exit */
148
waitpid(process_itr->pid, &status, 0);
149
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
150
write(STDOUT_FILENO, process_itr->buffer,
151
process_itr->buffer_length);
154
FD_CLR(process_itr->fd, &rfds_orig);
164
for(process *process_itr = process_list; process_itr != NULL;
165
process_itr = process_itr->next){
166
close(process_itr->fd);
167
kill(process_itr->pid, SIGTERM);
168
free(process_itr->buffer);
916
for(plugin *p = plugin_list; p != NULL; p = p->next){
921
fprintf(stderr, "No plugin processes started. Incorrect plugin"
927
/* Main loop while running plugins exist */
929
fd_set rfds = rfds_all;
930
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
931
if (select_ret == -1){
933
exitstatus = EXIT_FAILURE;
936
/* OK, now either a process completed, or something can be read
938
for(plugin *proc = plugin_list; proc != NULL;){
939
/* Is this process completely done? */
940
if(proc->eof and proc->completed){
941
/* Only accept the plugin output if it exited cleanly */
942
if(not WIFEXITED(proc->status)
943
or WEXITSTATUS(proc->status) != 0){
944
/* Bad exit by plugin */
947
if(WIFEXITED(proc->status)){
948
fprintf(stderr, "Plugin %u exited with status %d\n",
949
(unsigned int) (proc->pid),
950
WEXITSTATUS(proc->status));
951
} else if(WIFSIGNALED(proc->status)) {
952
fprintf(stderr, "Plugin %u killed by signal %d\n",
953
(unsigned int) (proc->pid),
954
WTERMSIG(proc->status));
955
} else if(WCOREDUMP(proc->status)){
956
fprintf(stderr, "Plugin %d dumped core\n",
957
(unsigned int) (proc->pid));
961
/* Remove the plugin */
962
FD_CLR(proc->fd, &rfds_all);
964
/* Block signal while modifying process_list */
965
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
967
perror("sigprocmask");
968
exitstatus = EXIT_FAILURE;
972
plugin *next_plugin = proc->next;
976
/* We are done modifying process list, so unblock signal */
977
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
980
perror("sigprocmask");
981
exitstatus = EXIT_FAILURE;
985
if(plugin_list == NULL){
992
/* This process exited nicely, so print its buffer */
994
bool bret = print_out_password(proc->buffer,
995
proc->buffer_length);
997
perror("print_out_password");
998
exitstatus = EXIT_FAILURE;
1003
/* This process has not completed. Does it have any output? */
1004
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1005
/* This process had nothing to say at this time */
1009
/* Before reading, make the process' data buffer large enough */
1010
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1011
proc->buffer = realloc(proc->buffer, proc->buffer_size
1012
+ (size_t) BUFFER_SIZE);
1013
if (proc->buffer == NULL){
1015
exitstatus = EXIT_FAILURE;
1018
proc->buffer_size += BUFFER_SIZE;
1020
/* Read from the process */
1021
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1024
/* Read error from this process; ignore the error */
1032
proc->buffer_length += (size_t) ret;
1040
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1041
/* Fallback if all plugins failed, none are found or an error
1044
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1045
char *passwordbuffer = getpass("Password: ");
1046
size_t len = strlen(passwordbuffer);
1047
/* Strip trailing newline */
1048
if(len > 0 and passwordbuffer[len-1] == '\n'){
1049
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1052
bret = print_out_password(passwordbuffer, len);
1054
perror("print_out_password");
1055
exitstatus = EXIT_FAILURE;
1059
/* Restore old signal handler */
1060
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1062
perror("sigaction");
1063
exitstatus = EXIT_FAILURE;
1066
if(custom_argv != NULL){
1067
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1077
/* Kill the processes */
1078
for(plugin *p = plugin_list; p != NULL; p = p->next){
1081
ret = kill(p->pid, SIGTERM);
1082
if(ret == -1 and errno != ESRCH){
1083
/* Set-uid proccesses might not get closed */
1089
/* Wait for any remaining child processes to terminate */
1093
if(errno != ECHILD){