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- Committer: teddy at bsnet
- Date: 2010-10-01 18:40:55 UTC
- Revision ID: teddy@fukt.bsnet.se-20101001184055-y2ws8u0edf81dle6
* debian/control (Standards-Version): Updated to "3.9.1".
* mandos-keygen: Use "set -e" as per Debian Policy section 10.4.
* mandos-keygen: Use "set -e" as per Debian Policy section 10.4.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008-2010 Teddy Hogeborn
6
* Copyright © 2008-2010 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
21
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
23
*/
23
24
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
26
27
#include <stddef.h> /* size_t, NULL */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
29
30
#include <stdbool.h> /* bool, true, false */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
31
#include <stdio.h> /* fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
34
stat, waitpid(), WIFEXITED(),
34
35
WEXITSTATUS(), wait(), pid_t,
35
36
uid_t, gid_t, getuid(), getgid(),
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(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
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(),
51
53
close() */
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
55
FD_CLOEXEC */
54
#include <string.h> /* strtok, strlen(), strcpy(),
55
strcat() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
56
58
#include <errno.h> /* errno */
57
59
#include <argp.h> /* struct argp_option, struct
58
60
argp_state, struct argp,
59
61
argp_parse(), ARGP_ERR_UNKNOWN,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
61
64
#include <signal.h> /* struct sigaction, sigemptyset(),
62
65
sigaddset(), sigaction(),
63
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
64
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
65
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
const char *argp_program_version = "mandos-client 1.0";
78
#define PDIR "/lib/mandos/plugins.d"
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
81
const char *argp_program_version = "plugin-runner " VERSION;
70
82
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
83
72
struct process;
73
74
typedef struct process{
84
typedef struct plugin{
85
char *name; /* can be NULL or any plugin name */
86
char **argv;
87
int argc;
88
char **environ;
89
int envc;
90
bool disabled;
91
92
/* Variables used for running processes*/
75
93
pid_t pid;
76
94
int fd;
77
95
char *buffer;
78
96
size_t buffer_size;
79
97
size_t buffer_length;
80
98
bool eof;
81
bool completed;
99
volatile sig_atomic_t completed;
82
100
int status;
83
struct process *next;
84
} process;
85
86
typedef struct plugin{
87
char *name; /* can be NULL or any plugin name */
88
char **argv;
89
int argc;
90
bool disabled;
91
101
struct plugin *next;
92
102
} plugin;
93
103
94
static plugin *getplugin(char *name, plugin **plugin_list){
95
for (plugin *p = *plugin_list; p != NULL; p = p->next){
96
if ((p->name == name)
97
or (p->name and name and (strcmp(p->name, name) == 0))){
104
static plugin *plugin_list = NULL;
105
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){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
98
113
return p;
99
114
}
100
115
}
101
116
/* Create a new plugin */
102
plugin *new_plugin = malloc(sizeof(plugin));
103
if (new_plugin == NULL){
104
perror("malloc");
105
exit(EXIT_FAILURE);
106
}
107
new_plugin->name = name;
108
new_plugin->argv = malloc(sizeof(char *) * 2);
109
if (new_plugin->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
112
}
113
new_plugin->argv[0] = name;
117
plugin *new_plugin = NULL;
118
do {
119
new_plugin = malloc(sizeof(plugin));
120
} while(new_plugin == NULL and errno == EINTR);
121
if(new_plugin == NULL){
122
return NULL;
123
}
124
char *copy_name = NULL;
125
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
return NULL;
134
}
135
}
136
137
*new_plugin = (plugin){ .name = copy_name,
138
.argc = 1,
139
.disabled = false,
140
.next = plugin_list };
141
142
do {
143
new_plugin->argv = malloc(sizeof(char *) * 2);
144
} while(new_plugin->argv == NULL and errno == EINTR);
145
if(new_plugin->argv == NULL){
146
int e = errno;
147
free(copy_name);
148
free(new_plugin);
149
errno = e;
150
return NULL;
151
}
152
new_plugin->argv[0] = copy_name;
114
153
new_plugin->argv[1] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
154
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
158
if(new_plugin->environ == NULL){
159
int e = errno;
160
free(copy_name);
161
free(new_plugin->argv);
162
free(new_plugin);
163
errno = e;
164
return NULL;
165
}
166
new_plugin->environ[0] = NULL;
167
118
168
/* Append the new plugin to the list */
119
*plugin_list = new_plugin;
169
plugin_list = new_plugin;
120
170
return new_plugin;
121
171
}
122
172
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
127
perror("malloc");
128
exit(EXIT_FAILURE);
129
}
130
p->argc++;
131
p->argv[p->argc] = NULL;
173
/* Helper function for add_argument and add_environment */
174
static bool add_to_char_array(const char *new, char ***array,
175
int *len){
176
/* Resize the pointed-to array to hold one more pointer */
177
do {
178
*array = realloc(*array, sizeof(char *)
179
* (size_t) ((*len) + 2));
180
} while(*array == NULL and errno == EINTR);
181
/* Malloc check */
182
if(*array == NULL){
183
return false;
184
}
185
/* Make a copy of the new string */
186
char *copy;
187
do {
188
copy = strdup(new);
189
} while(copy == NULL and errno == EINTR);
190
if(copy == NULL){
191
return false;
192
}
193
/* Insert the copy */
194
(*array)[*len] = copy;
195
(*len)++;
196
/* Add a new terminating NULL pointer to the last element */
197
(*array)[*len] = NULL;
198
return true;
199
}
200
201
/* Add to a plugin's argument vector */
202
static bool add_argument(plugin *p, const char *arg){
203
if(p == NULL){
204
return false;
205
}
206
return add_to_char_array(arg, &(p->argv), &(p->argc));
207
}
208
209
/* Add to a plugin's environment */
210
static bool add_environment(plugin *p, const char *def, bool replace){
211
if(p == NULL){
212
return false;
213
}
214
/* namelen = length of name of environment variable */
215
size_t namelen = (size_t)(strchrnul(def, '=') - def);
216
/* Search for this environment variable */
217
for(char **e = p->environ; *e != NULL; e++){
218
if(strncmp(*e, def, namelen + 1) == 0){
219
/* It already exists */
220
if(replace){
221
char *new;
222
do {
223
new = realloc(*e, strlen(def) + 1);
224
} while(new == NULL and errno == EINTR);
225
if(new == NULL){
226
return false;
227
}
228
*e = new;
229
strcpy(*e, def);
230
}
231
return true;
232
}
233
}
234
return add_to_char_array(def, &(p->environ), &(p->envc));
132
235
}
133
236
134
237
/*
135
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
136
239
* Descriptor Flags".
137
* *Note File Descriptor Flags:(libc)Descriptor Flags.
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
138
241
*/
139
static int set_cloexec_flag(int fd)
140
{
141
int ret = fcntl(fd, F_GETFD, 0);
242
static int set_cloexec_flag(int fd){
243
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
142
244
/* If reading the flags failed, return error indication now. */
143
245
if(ret < 0){
144
246
return ret;
145
247
}
146
248
/* Store modified flag word in the descriptor. */
147
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
250
ret | FD_CLOEXEC));
148
251
}
149
252
150
process *process_list = NULL;
151
253
152
/* Mark a process as completed when it exits, and save its exit
254
/* Mark processes as completed when they exit, and save their exit
153
255
status. */
154
void handle_sigchld(__attribute__((unused)) int sig){
155
process *proc = process_list;
156
int status;
157
pid_t pid = wait(&status);
158
if(pid == -1){
159
perror("wait");
160
return;
161
}
162
while(proc != NULL and proc->pid != pid){
163
proc = proc->next;
164
}
165
if(proc == NULL){
166
/* Process not found in process list */
167
return;
168
}
169
proc->status = status;
170
proc->completed = true;
256
static void handle_sigchld(__attribute__((unused)) int sig){
257
int old_errno = errno;
258
while(true){
259
plugin *proc = plugin_list;
260
int status;
261
pid_t pid = waitpid(-1, &status, WNOHANG);
262
if(pid == 0){
263
/* Only still running child processes */
264
break;
265
}
266
if(pid == -1){
267
if(errno == ECHILD){
268
/* No child processes */
269
break;
270
}
271
error(0, errno, "waitpid");
272
}
273
274
/* A child exited, find it in process_list */
275
while(proc != NULL and proc->pid != pid){
276
proc = proc->next;
277
}
278
if(proc == NULL){
279
/* Process not found in process list */
280
continue;
281
}
282
proc->status = status;
283
proc->completed = 1;
284
}
285
errno = old_errno;
171
286
}
172
287
173
bool print_out_password(const char *buffer, size_t length){
288
/* Prints out a password to stdout */
289
static bool print_out_password(const char *buffer, size_t length){
174
290
ssize_t ret;
175
if(length>0 and buffer[length-1] == '\n'){
176
length--;
177
}
178
291
for(size_t written = 0; written < length; written += (size_t)ret){
179
292
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
180
293
length - written));
185
298
return true;
186
299
}
187
300
301
/* Removes and free a plugin from the plugin list */
302
static void free_plugin(plugin *plugin_node){
303
304
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
305
free(*arg);
306
}
307
free(plugin_node->argv);
308
for(char **env = plugin_node->environ; *env != NULL; env++){
309
free(*env);
310
}
311
free(plugin_node->environ);
312
free(plugin_node->buffer);
313
314
/* Removes the plugin from the singly-linked list */
315
if(plugin_node == plugin_list){
316
/* First one - simple */
317
plugin_list = plugin_list->next;
318
} else {
319
/* Second one or later */
320
for(plugin *p = plugin_list; p != NULL; p = p->next){
321
if(p->next == plugin_node){
322
p->next = plugin_node->next;
323
break;
324
}
325
}
326
}
327
328
free(plugin_node);
329
}
330
331
static void free_plugin_list(void){
332
while(plugin_list != NULL){
333
free_plugin(plugin_list);
334
}
335
}
336
188
337
int main(int argc, char *argv[]){
189
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
338
char *plugindir = NULL;
339
char *argfile = NULL;
340
FILE *conffp;
190
341
size_t d_name_len;
191
342
DIR *dir = NULL;
192
343
struct dirent *dirst;
193
344
struct stat st;
194
345
fd_set rfds_all;
195
346
int ret, maxfd = 0;
347
ssize_t sret;
196
348
uid_t uid = 65534;
197
349
gid_t gid = 65534;
198
350
bool debug = false;
200
352
struct sigaction old_sigchld_action;
201
353
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
202
354
.sa_flags = SA_NOCLDSTOP };
203
char *plus_options = NULL;
204
char **plus_argv = NULL;
205
206
errno = 0;
355
char **custom_argv = NULL;
356
int custom_argc = 0;
207
357
208
358
/* Establish a signal handler */
209
359
sigemptyset(&sigchld_action.sa_mask);
210
360
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
211
if(ret < 0){
212
perror("sigaddset");
213
exit(EXIT_FAILURE);
361
if(ret == -1){
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
364
goto fallback;
214
365
}
215
366
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
216
if(ret < 0){
217
perror("sigaction");
218
exit(EXIT_FAILURE);
367
if(ret == -1){
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
370
goto fallback;
219
371
}
220
372
221
373
/* The options we understand. */
223
375
{ .name = "global-options", .key = 'g',
224
376
.arg = "OPTION[,OPTION[,...]]",
225
377
.doc = "Options passed to all plugins" },
378
{ .name = "global-env", .key = 'G',
379
.arg = "VAR=value",
380
.doc = "Environment variable passed to all plugins" },
226
381
{ .name = "options-for", .key = 'o',
227
382
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
228
383
.doc = "Options passed only to specified plugin" },
384
{ .name = "env-for", .key = 'E',
385
.arg = "PLUGIN:ENV=value",
386
.doc = "Environment variable passed to specified plugin" },
229
387
{ .name = "disable", .key = 'd',
230
388
.arg = "PLUGIN",
231
389
.doc = "Disable a specific plugin", .group = 1 },
390
{ .name = "enable", .key = 'e',
391
.arg = "PLUGIN",
392
.doc = "Enable a specific plugin", .group = 1 },
232
393
{ .name = "plugin-dir", .key = 128,
233
394
.arg = "DIRECTORY",
234
395
.doc = "Specify a different plugin directory", .group = 2 },
235
{ .name = "userid", .key = 129,
236
.arg = "ID", .flags = 0,
237
.doc = "User ID the plugins will run as", .group = 2 },
238
{ .name = "groupid", .key = 130,
239
.arg = "ID", .flags = 0,
240
.doc = "Group ID the plugins will run as", .group = 2 },
241
{ .name = "debug", .key = 131,
242
.doc = "Debug mode", .group = 3 },
396
{ .name = "config-file", .key = 129,
397
.arg = "FILE",
398
.doc = "Specify a different configuration file", .group = 2 },
399
{ .name = "userid", .key = 130,
400
.arg = "ID", .flags = 0,
401
.doc = "User ID the plugins will run as", .group = 3 },
402
{ .name = "groupid", .key = 131,
403
.arg = "ID", .flags = 0,
404
.doc = "Group ID the plugins will run as", .group = 3 },
405
{ .name = "debug", .key = 132,
406
.doc = "Debug mode", .group = 4 },
407
/*
408
* These reproduce what we would get without ARGP_NO_HELP
409
*/
410
{ .name = "help", .key = '?',
411
.doc = "Give this help list", .group = -1 },
412
{ .name = "usage", .key = -3,
413
.doc = "Give a short usage message", .group = -1 },
414
{ .name = "version", .key = 'V',
415
.doc = "Print program version", .group = -1 },
243
416
{ .name = NULL }
244
417
};
245
418
246
error_t parse_opt (int key, char *arg, struct argp_state *state) {
247
/* Get the INPUT argument from `argp_parse', which we know is a
248
pointer to our plugin list pointer. */
249
plugin **plugins = state->input;
250
switch (key) {
251
case 'g':
252
if (arg != NULL){
253
char *p = strtok(arg, ",");
254
do{
255
addargument(getplugin(NULL, plugins), p);
256
p = strtok(NULL, ",");
257
} while (p != NULL);
258
}
259
break;
260
case 'o':
261
if (arg != NULL){
262
char *name = strtok(arg, ":");
263
char *p = strtok(NULL, ":");
264
if(p != NULL){
265
p = strtok(p, ",");
266
do{
267
addargument(getplugin(name, plugins), p);
268
p = strtok(NULL, ",");
269
} while (p != NULL);
270
}
271
}
272
break;
273
case 'd':
274
if (arg != NULL){
275
getplugin(arg, plugins)->disabled = true;
276
}
277
break;
278
case 128:
279
plugindir = arg;
280
break;
281
case 129:
282
uid = (uid_t)strtol(arg, NULL, 10);
283
break;
284
case 130:
285
gid = (gid_t)strtol(arg, NULL, 10);
286
break;
287
case 131:
419
error_t parse_opt(int key, char *arg, struct argp_state *state){
420
errno = 0;
421
switch(key){
422
char *tmp;
423
intmax_t tmpmax;
424
case 'g': /* --global-options */
425
{
426
char *plugin_option;
427
while((plugin_option = strsep(&arg, ",")) != NULL){
428
if(not add_argument(getplugin(NULL), plugin_option)){
429
break;
430
}
431
}
432
}
433
break;
434
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
436
break;
437
case 'o': /* --options-for */
438
{
439
char *option_list = strchr(arg, ':');
440
if(option_list == NULL){
441
argp_error(state, "No colon in \"%s\"", arg);
442
errno = EINVAL;
443
break;
444
}
445
*option_list = '\0';
446
option_list++;
447
if(arg[0] == '\0'){
448
argp_error(state, "Empty plugin name");
449
errno = EINVAL;
450
break;
451
}
452
char *option;
453
while((option = strsep(&option_list, ",")) != NULL){
454
if(not add_argument(getplugin(arg), option)){
455
break;
456
}
457
}
458
}
459
break;
460
case 'E': /* --env-for */
461
{
462
char *envdef = strchr(arg, ':');
463
if(envdef == NULL){
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
466
break;
467
}
468
*envdef = '\0';
469
envdef++;
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
474
}
475
add_environment(getplugin(arg), envdef, true);
476
}
477
break;
478
case 'd': /* --disable */
479
{
480
plugin *p = getplugin(arg);
481
if(p != NULL){
482
p->disabled = true;
483
}
484
}
485
break;
486
case 'e': /* --enable */
487
{
488
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = false;
491
}
492
}
493
break;
494
case 128: /* --plugin-dir */
495
free(plugindir);
496
plugindir = strdup(arg);
497
break;
498
case 129: /* --config-file */
499
/* This is already done by parse_opt_config_file() */
500
break;
501
case 130: /* --userid */
502
tmpmax = strtoimax(arg, &tmp, 10);
503
if(errno != 0 or tmp == arg or *tmp != '\0'
504
or tmpmax != (uid_t)tmpmax){
505
argp_error(state, "Bad user ID number: \"%s\", using %"
506
PRIdMAX, arg, (intmax_t)uid);
507
break;
508
}
509
uid = (uid_t)tmpmax;
510
break;
511
case 131: /* --groupid */
512
tmpmax = strtoimax(arg, &tmp, 10);
513
if(errno != 0 or tmp == arg or *tmp != '\0'
514
or tmpmax != (gid_t)tmpmax){
515
argp_error(state, "Bad group ID number: \"%s\", using %"
516
PRIdMAX, arg, (intmax_t)gid);
517
break;
518
}
519
gid = (gid_t)tmpmax;
520
break;
521
case 132: /* --debug */
288
522
debug = true;
289
523
break;
524
/*
525
* These reproduce what we would get without ARGP_NO_HELP
526
*/
527
case '?': /* --help */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
530
case -3: /* --usage */
531
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
532
argp_state_help(state, state->out_stream,
533
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
534
case 'V': /* --version */
535
fprintf(state->out_stream, "%s\n", argp_program_version);
536
exit(EXIT_SUCCESS);
537
break;
538
/*
539
* When adding more options before this line, remember to also add a
540
* "case" to the "parse_opt_config_file" function below.
541
*/
290
542
case ARGP_KEY_ARG:
291
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
292
argp_usage (state);
543
/* Cryptsetup always passes an argument, which is an empty
544
string if "none" was specified in /etc/crypttab. So if
545
argument was empty, we ignore it silently. */
546
if(arg[0] == '\0'){
547
break;
293
548
}
294
plus_options = arg;
295
break;
296
case ARGP_KEY_END:
297
break;
298
default:
299
return ARGP_ERR_UNKNOWN;
300
}
301
return 0;
302
}
303
304
plugin *plugin_list = NULL;
305
306
struct argp argp = { .options = options, .parser = parse_opt,
307
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
549
default:
550
return ARGP_ERR_UNKNOWN;
551
}
552
return errno; /* Set to 0 at start */
553
}
554
555
/* This option parser is the same as parse_opt() above, except it
556
ignores everything but the --config-file option. */
557
error_t parse_opt_config_file(int key, char *arg,
558
__attribute__((unused))
559
struct argp_state *state){
560
errno = 0;
561
switch(key){
562
case 'g': /* --global-options */
563
case 'G': /* --global-env */
564
case 'o': /* --options-for */
565
case 'E': /* --env-for */
566
case 'd': /* --disable */
567
case 'e': /* --enable */
568
case 128: /* --plugin-dir */
569
break;
570
case 129: /* --config-file */
571
free(argfile);
572
argfile = strdup(arg);
573
break;
574
case 130: /* --userid */
575
case 131: /* --groupid */
576
case 132: /* --debug */
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
580
case ARGP_KEY_ARG:
581
break;
582
default:
583
return ARGP_ERR_UNKNOWN;
584
}
585
return errno;
586
}
587
588
struct argp argp = { .options = options,
589
.parser = parse_opt_config_file,
590
.args_doc = "",
308
591
.doc = "Mandos plugin runner -- Run plugins" };
309
592
310
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
311
if (ret == ARGP_ERR_UNKNOWN){
312
fprintf(stderr, "Unknown error while parsing arguments\n");
313
exitstatus = EXIT_FAILURE;
314
goto end;
315
}
316
317
if(plus_options){
318
/* This is a mangled argument in the form of
319
"+--option+--other-option=parameter+--yet-another-option", etc */
320
/* Make new argc and argv vars, and call argp_parse() again. */
321
plus_options++; /* skip the first '+' character */
322
const char delims[] = "+";
323
char *arg;
324
int new_argc = 1;
325
plus_argv = malloc(sizeof(char*) * 2);
326
if(plus_argv == NULL){
327
perror("malloc");
328
exitstatus = EXIT_FAILURE;
329
goto end;
330
}
331
plus_argv[0] = argv[0];
332
plus_argv[1] = NULL;
333
arg = strtok(plus_options, delims); /* Get first argument */
334
while(arg != NULL){
335
new_argc++;
336
plus_argv = realloc(plus_argv, sizeof(char *)
337
* ((unsigned int) new_argc + 1));
338
if(plus_argv == NULL){
339
perror("realloc");
340
exitstatus = EXIT_FAILURE;
341
goto end;
342
}
343
plus_argv[new_argc-1] = arg;
344
plus_argv[new_argc] = NULL;
345
arg = strtok(NULL, delims); /* Get next argument */
346
}
347
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
348
if (ret == ARGP_ERR_UNKNOWN){
349
fprintf(stderr, "Unknown error while parsing arguments\n");
350
exitstatus = EXIT_FAILURE;
351
goto end;
352
}
593
/* Parse using parse_opt_config_file() in order to get the custom
594
config file location, if any. */
595
ret = argp_parse(&argp, argc, argv,
596
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
597
NULL, NULL);
598
switch(ret){
599
case 0:
600
break;
601
case ENOMEM:
602
default:
603
errno = ret;
604
error(0, errno, "argp_parse");
605
exitstatus = EX_OSERR;
606
goto fallback;
607
case EINVAL:
608
exitstatus = EX_USAGE;
609
goto fallback;
610
}
611
612
/* Reset to the normal argument parser */
613
argp.parser = parse_opt;
614
615
/* Open the configfile if available */
616
if(argfile == NULL){
617
conffp = fopen(AFILE, "r");
618
} else {
619
conffp = fopen(argfile, "r");
620
}
621
if(conffp != NULL){
622
char *org_line = NULL;
623
char *p, *arg, *new_arg, *line;
624
size_t size = 0;
625
const char whitespace_delims[] = " \r\t\f\v\n";
626
const char comment_delim[] = "#";
627
628
custom_argc = 1;
629
custom_argv = malloc(sizeof(char*) * 2);
630
if(custom_argv == NULL){
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
633
goto fallback;
634
}
635
custom_argv[0] = argv[0];
636
custom_argv[1] = NULL;
637
638
/* for each line in the config file, strip whitespace and ignore
639
commented text */
640
while(true){
641
sret = getline(&org_line, &size, conffp);
642
if(sret == -1){
643
break;
644
}
645
646
line = org_line;
647
arg = strsep(&line, comment_delim);
648
while((p = strsep(&arg, whitespace_delims)) != NULL){
649
if(p[0] == '\0'){
650
continue;
651
}
652
new_arg = strdup(p);
653
if(new_arg == NULL){
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
656
free(org_line);
657
goto fallback;
658
}
659
660
custom_argc += 1;
661
custom_argv = realloc(custom_argv, sizeof(char *)
662
* ((unsigned int) custom_argc + 1));
663
if(custom_argv == NULL){
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
666
free(org_line);
667
goto fallback;
668
}
669
custom_argv[custom_argc-1] = new_arg;
670
custom_argv[custom_argc] = NULL;
671
}
672
}
673
do {
674
ret = fclose(conffp);
675
} while(ret == EOF and errno == EINTR);
676
if(ret == EOF){
677
error(0, errno, "fclose");
678
exitstatus = EX_IOERR;
679
goto fallback;
680
}
681
free(org_line);
682
} else {
683
/* Check for harmful errors and go to fallback. Other errors might
684
not affect opening plugins */
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
688
goto fallback;
689
}
690
}
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
693
if(custom_argv != NULL){
694
ret = argp_parse(&argp, custom_argc, custom_argv,
695
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
696
NULL, NULL);
697
switch(ret){
698
case 0:
699
break;
700
case ENOMEM:
701
default:
702
errno = ret;
703
error(0, errno, "argp_parse");
704
exitstatus = EX_OSERR;
705
goto fallback;
706
case EINVAL:
707
exitstatus = EX_CONFIG;
708
goto fallback;
709
}
710
}
711
712
/* Parse actual command line arguments, to let them override the
713
config file */
714
ret = argp_parse(&argp, argc, argv,
715
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
716
NULL, NULL);
717
switch(ret){
718
case 0:
719
break;
720
case ENOMEM:
721
default:
722
errno = ret;
723
error(0, errno, "argp_parse");
724
exitstatus = EX_OSERR;
725
goto fallback;
726
case EINVAL:
727
exitstatus = EX_USAGE;
728
goto fallback;
353
729
}
354
730
355
731
if(debug){
359
735
for(char **a = p->argv; *a != NULL; a++){
360
736
fprintf(stderr, "\tArg: %s\n", *a);
361
737
}
738
fprintf(stderr, "...and %d environment variables\n", p->envc);
739
for(char **a = p->environ; *a != NULL; a++){
740
fprintf(stderr, "\t%s\n", *a);
741
}
362
742
}
363
743
}
364
744
745
/* Strip permissions down to nobody */
746
setgid(gid);
747
if(ret == -1){
748
error(0, errno, "setgid");
749
}
365
750
ret = setuid(uid);
366
if (ret == -1){
367
perror("setuid");
368
}
369
370
setgid(gid);
371
if (ret == -1){
372
perror("setgid");
373
}
374
375
dir = opendir(plugindir);
376
if(dir == NULL){
377
perror("Could not open plugin dir");
378
exitstatus = EXIT_FAILURE;
379
goto end;
380
}
381
382
/* Set the FD_CLOEXEC flag on the directory, if possible */
751
if(ret == -1){
752
error(0, errno, "setuid");
753
}
754
755
/* Open plugin directory with close_on_exec flag */
383
756
{
384
int dir_fd = dirfd(dir);
385
if(dir_fd >= 0){
386
ret = set_cloexec_flag(dir_fd);
387
if(ret < 0){
388
perror("set_cloexec_flag");
389
exitstatus = EXIT_FAILURE;
390
goto end;
391
}
757
int dir_fd = -1;
758
if(plugindir == NULL){
759
dir_fd = open(PDIR, O_RDONLY |
760
#ifdef O_CLOEXEC
761
O_CLOEXEC
762
#else /* not O_CLOEXEC */
763
0
764
#endif /* not O_CLOEXEC */
765
);
766
} else {
767
dir_fd = open(plugindir, O_RDONLY |
768
#ifdef O_CLOEXEC
769
O_CLOEXEC
770
#else /* not O_CLOEXEC */
771
0
772
#endif /* not O_CLOEXEC */
773
);
774
}
775
if(dir_fd == -1){
776
error(0, errno, "Could not open plugin dir");
777
exitstatus = EX_UNAVAILABLE;
778
goto fallback;
779
}
780
781
#ifndef O_CLOEXEC
782
/* Set the FD_CLOEXEC flag on the directory */
783
ret = set_cloexec_flag(dir_fd);
784
if(ret < 0){
785
error(0, errno, "set_cloexec_flag");
786
TEMP_FAILURE_RETRY(close(dir_fd));
787
exitstatus = EX_OSERR;
788
goto fallback;
789
}
790
#endif /* O_CLOEXEC */
791
792
dir = fdopendir(dir_fd);
793
if(dir == NULL){
794
error(0, errno, "Could not open plugin dir");
795
TEMP_FAILURE_RETRY(close(dir_fd));
796
exitstatus = EX_OSERR;
797
goto fallback;
392
798
}
393
799
}
394
800
395
801
FD_ZERO(&rfds_all);
396
802
803
/* Read and execute any executable in the plugin directory*/
397
804
while(true){
398
dirst = readdir(dir);
805
do {
806
dirst = readdir(dir);
807
} while(dirst == NULL and errno == EINTR);
399
808
400
// All directory entries have been processed
809
/* All directory entries have been processed */
401
810
if(dirst == NULL){
402
if (errno == EBADF){
403
perror("readdir");
404
exitstatus = EXIT_FAILURE;
405
goto end;
811
if(errno == EBADF){
812
error(0, errno, "readdir");
813
exitstatus = EX_IOERR;
814
goto fallback;
406
815
}
407
816
break;
408
817
}
409
818
410
819
d_name_len = strlen(dirst->d_name);
411
820
412
// Ignore dotfiles, backup files and other junk
821
/* Ignore dotfiles, backup files and other junk */
413
822
{
414
823
bool bad_name = false;
415
824
417
826
418
827
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
419
828
".dpkg-old",
829
".dpkg-bak",
420
830
".dpkg-divert", NULL };
421
831
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
422
832
size_t pre_len = strlen(*pre);
430
840
break;
431
841
}
432
842
}
433
434
843
if(bad_name){
435
844
continue;
436
845
}
437
438
846
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
439
847
size_t suf_len = strlen(*suf);
440
848
if((d_name_len >= suf_len)
441
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
849
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
442
850
== 0)){
443
851
if(debug){
444
852
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
454
862
}
455
863
}
456
864
457
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
458
if (filename == NULL){
459
perror("malloc");
865
char *filename;
866
if(plugindir == NULL){
867
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
868
dirst->d_name));
869
} else {
870
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
871
plugindir,
872
dirst->d_name));
873
}
874
if(ret < 0){
875
error(0, errno, "asprintf");
460
876
continue;
461
877
}
462
strcpy(filename, plugindir); /* Spurious warning */
463
strcat(filename, "/"); /* Spurious warning */
464
strcat(filename, dirst->d_name); /* Spurious warning */
465
878
466
ret = stat(filename, &st);
467
if (ret == -1){
468
perror("stat");
879
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
880
if(ret == -1){
881
error(0, errno, "stat");
469
882
free(filename);
470
883
continue;
471
884
}
472
885
473
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
886
/* Ignore non-executable files */
887
if(not S_ISREG(st.st_mode)
888
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
474
889
if(debug){
475
890
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
476
891
" with bad type or mode\n", filename);
478
893
free(filename);
479
894
continue;
480
895
}
481
if(getplugin(dirst->d_name, &plugin_list)->disabled){
896
897
plugin *p = getplugin(dirst->d_name);
898
if(p == NULL){
899
error(0, errno, "getplugin");
900
free(filename);
901
continue;
902
}
903
if(p->disabled){
482
904
if(debug){
483
905
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
484
906
dirst->d_name);
486
908
free(filename);
487
909
continue;
488
910
}
489
plugin *p = getplugin(dirst->d_name, &plugin_list);
490
911
{
491
912
/* Add global arguments to argument list for this plugin */
492
plugin *g = getplugin(NULL, &plugin_list);
493
for(char **a = g->argv + 1; *a != NULL; a++){
494
addargument(p, *a);
495
}
496
}
497
int pipefd[2];
498
ret = pipe(pipefd);
499
if (ret == -1){
500
perror("pipe");
501
exitstatus = EXIT_FAILURE;
502
goto end;
503
}
913
plugin *g = getplugin(NULL);
914
if(g != NULL){
915
for(char **a = g->argv + 1; *a != NULL; a++){
916
if(not add_argument(p, *a)){
917
error(0, errno, "add_argument");
918
}
919
}
920
/* Add global environment variables */
921
for(char **e = g->environ; *e != NULL; e++){
922
if(not add_environment(p, *e, false)){
923
error(0, errno, "add_environment");
924
}
925
}
926
}
927
}
928
/* If this plugin has any environment variables, we will call
929
using execve and need to duplicate the environment from this
930
process, too. */
931
if(p->environ[0] != NULL){
932
for(char **e = environ; *e != NULL; e++){
933
if(not add_environment(p, *e, false)){
934
error(0, errno, "add_environment");
935
}
936
}
937
}
938
939
int pipefd[2];
940
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
941
if(ret == -1){
942
error(0, errno, "pipe");
943
exitstatus = EX_OSERR;
944
goto fallback;
945
}
946
/* Ask OS to automatic close the pipe on exec */
504
947
ret = set_cloexec_flag(pipefd[0]);
505
948
if(ret < 0){
506
perror("set_cloexec_flag");
507
exitstatus = EXIT_FAILURE;
508
goto end;
949
error(0, errno, "set_cloexec_flag");
950
exitstatus = EX_OSERR;
951
goto fallback;
509
952
}
510
953
ret = set_cloexec_flag(pipefd[1]);
511
954
if(ret < 0){
512
perror("set_cloexec_flag");
513
exitstatus = EXIT_FAILURE;
514
goto end;
955
error(0, errno, "set_cloexec_flag");
956
exitstatus = EX_OSERR;
957
goto fallback;
515
958
}
516
959
/* Block SIGCHLD until process is safely in process list */
517
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
518
963
if(ret < 0){
519
perror("sigprocmask");
520
exitstatus = EXIT_FAILURE;
521
goto end;
964
error(0, errno, "sigprocmask");
965
exitstatus = EX_OSERR;
966
goto fallback;
522
967
}
523
// Starting a new process to be watched
524
pid_t pid = fork();
968
/* Starting a new process to be watched */
969
pid_t pid;
970
do {
971
pid = fork();
972
} while(pid == -1 and errno == EINTR);
525
973
if(pid == -1){
526
perror("fork");
527
exitstatus = EXIT_FAILURE;
528
goto end;
974
error(0, errno, "fork");
975
exitstatus = EX_OSERR;
976
goto fallback;
529
977
}
530
978
if(pid == 0){
531
979
/* this is the child process */
532
980
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
533
981
if(ret < 0){
534
perror("sigaction");
535
_exit(EXIT_FAILURE);
982
error(0, errno, "sigaction");
983
_exit(EX_OSERR);
536
984
}
537
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
985
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
538
986
if(ret < 0){
539
perror("sigprocmask");
540
_exit(EXIT_FAILURE);
987
error(0, errno, "sigprocmask");
988
_exit(EX_OSERR);
541
989
}
542
990
543
991
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
544
992
if(ret == -1){
545
perror("dup2");
546
_exit(EXIT_FAILURE);
993
error(0, errno, "dup2");
994
_exit(EX_OSERR);
547
995
}
548
996
549
997
if(dirfd(dir) < 0){
551
999
above and must now close it manually here. */
552
1000
closedir(dir);
553
1001
}
554
if(execv(filename, p->argv) < 0){
555
perror("execv");
556
_exit(EXIT_FAILURE);
1002
if(p->environ[0] == NULL){
1003
if(execv(filename, p->argv) < 0){
1004
error(0, errno, "execv for %s", filename);
1005
_exit(EX_OSERR);
1006
}
1007
} else {
1008
if(execve(filename, p->argv, p->environ) < 0){
1009
error(0, errno, "execve for %s", filename);
1010
_exit(EX_OSERR);
1011
}
557
1012
}
558
1013
/* no return */
559
1014
}
560
/* parent process */
1015
/* Parent process */
1016
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1017
pipe */
561
1018
free(filename);
562
close(pipefd[1]); /* close unused write end of pipe */
563
process *new_process = malloc(sizeof(process));
564
if (new_process == NULL){
565
perror("malloc");
566
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1019
plugin *new_plugin = getplugin(dirst->d_name);
1020
if(new_plugin == NULL){
1021
error(0, errno, "getplugin");
1022
ret = (int)(TEMP_FAILURE_RETRY
1023
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1024
NULL)));
567
1025
if(ret < 0){
568
perror("sigprocmask");
1026
error(0, errno, "sigprocmask");
569
1027
}
570
exitstatus = EXIT_FAILURE;
571
goto end;
1028
exitstatus = EX_OSERR;
1029
goto fallback;
572
1030
}
573
1031
574
*new_process = (struct process){ .pid = pid,
575
.fd = pipefd[0],
576
.next = process_list };
577
// List handling
578
process_list = new_process;
1032
new_plugin->pid = pid;
1033
new_plugin->fd = pipefd[0];
1034
579
1035
/* Unblock SIGCHLD so signal handler can be run if this process
580
1036
has already completed */
581
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1038
&sigchld_action.sa_mask,
1039
NULL));
582
1040
if(ret < 0){
583
perror("sigprocmask");
584
exitstatus = EXIT_FAILURE;
585
goto end;
586
}
587
588
FD_SET(new_process->fd, &rfds_all);
589
590
if (maxfd < new_process->fd){
591
maxfd = new_process->fd;
592
}
593
594
}
595
596
/* Free the plugin list */
597
for(plugin *next; plugin_list != NULL; plugin_list = next){
598
next = plugin_list->next;
599
free(plugin_list->argv);
600
free(plugin_list);
601
}
602
603
closedir(dir);
1041
error(0, errno, "sigprocmask");
1042
exitstatus = EX_OSERR;
1043
goto fallback;
1044
}
1045
1046
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1047
-Wconversion */
1048
1049
if(maxfd < new_plugin->fd){
1050
maxfd = new_plugin->fd;
1051
}
1052
}
1053
1054
TEMP_FAILURE_RETRY(closedir(dir));
604
1055
dir = NULL;
605
606
if (process_list == NULL){
607
fprintf(stderr, "No plugin processes started. Incorrect plugin"
608
" directory?\n");
609
process_list = NULL;
1056
free_plugin(getplugin(NULL));
1057
1058
for(plugin *p = plugin_list; p != NULL; p = p->next){
1059
if(p->pid != 0){
1060
break;
1061
}
1062
if(p->next == NULL){
1063
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1064
" directory?\n");
1065
free_plugin_list();
1066
}
610
1067
}
611
while(process_list){
1068
1069
/* Main loop while running plugins exist */
1070
while(plugin_list){
612
1071
fd_set rfds = rfds_all;
613
1072
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
614
if (select_ret == -1){
615
perror("select");
616
exitstatus = EXIT_FAILURE;
617
goto end;
1073
if(select_ret == -1 and errno != EINTR){
1074
error(0, errno, "select");
1075
exitstatus = EX_OSERR;
1076
goto fallback;
618
1077
}
619
1078
/* OK, now either a process completed, or something can be read
620
1079
from one of them */
621
for(process *proc = process_list; proc ; proc = proc->next){
1080
for(plugin *proc = plugin_list; proc != NULL;){
622
1081
/* Is this process completely done? */
623
if(proc->eof and proc->completed){
1082
if(proc->completed and proc->eof){
624
1083
/* Only accept the plugin output if it exited cleanly */
625
1084
if(not WIFEXITED(proc->status)
626
1085
or WEXITSTATUS(proc->status) != 0){
627
1086
/* Bad exit by plugin */
1087
628
1088
if(debug){
629
1089
if(WIFEXITED(proc->status)){
630
fprintf(stderr, "Plugin %u exited with status %d\n",
631
(unsigned int) (proc->pid),
1090
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1091
" status %d\n", proc->name,
1092
(intmax_t) (proc->pid),
632
1093
WEXITSTATUS(proc->status));
633
} else if(WIFSIGNALED(proc->status)) {
634
fprintf(stderr, "Plugin %u killed by signal %d\n",
635
(unsigned int) (proc->pid),
636
WTERMSIG(proc->status));
1094
} else if(WIFSIGNALED(proc->status)){
1095
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1096
" signal %d: %s\n", proc->name,
1097
(intmax_t) (proc->pid),
1098
WTERMSIG(proc->status),
1099
strsignal(WTERMSIG(proc->status)));
637
1100
} else if(WCOREDUMP(proc->status)){
638
fprintf(stderr, "Plugin %d dumped core\n",
639
(unsigned int) (proc->pid));
1101
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1102
" core\n", proc->name, (intmax_t) (proc->pid));
640
1103
}
641
1104
}
1105
642
1106
/* Remove the plugin */
643
FD_CLR(proc->fd, &rfds_all);
1107
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1108
-Wconversion */
1109
644
1110
/* Block signal while modifying process_list */
645
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1112
(SIG_BLOCK,
1113
&sigchld_action.sa_mask,
1114
NULL));
646
1115
if(ret < 0){
647
perror("sigprocmask");
648
exitstatus = EXIT_FAILURE;
649
goto end;
650
}
651
/* Delete this process entry from the list */
652
if(process_list == proc){
653
/* First one - simple */
654
process_list = proc->next;
655
} else {
656
/* Second one or later */
657
for(process *p = process_list; p != NULL; p = p->next){
658
if(p->next == proc){
659
p->next = proc->next;
660
break;
661
}
662
}
663
}
1116
error(0, errno, "sigprocmask");
1117
exitstatus = EX_OSERR;
1118
goto fallback;
1119
}
1120
1121
plugin *next_plugin = proc->next;
1122
free_plugin(proc);
1123
proc = next_plugin;
1124
664
1125
/* We are done modifying process list, so unblock signal */
665
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
666
NULL);
1126
ret = (int)(TEMP_FAILURE_RETRY
1127
(sigprocmask(SIG_UNBLOCK,
1128
&sigchld_action.sa_mask, NULL)));
667
1129
if(ret < 0){
668
perror("sigprocmask");
669
}
670
free(proc->buffer);
671
free(proc);
672
/* We deleted this process from the list, so we can't go
673
proc->next. Therefore, start over from the beginning of
674
the process list */
675
break;
1130
error(0, errno, "sigprocmask");
1131
exitstatus = EX_OSERR;
1132
goto fallback;
1133
}
1134
1135
if(plugin_list == NULL){
1136
break;
1137
}
1138
1139
continue;
676
1140
}
1141
677
1142
/* This process exited nicely, so print its buffer */
678
679
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1143
1144
bool bret = print_out_password(proc->buffer,
1145
proc->buffer_length);
680
1146
if(not bret){
681
perror("print_out_password");
682
exitstatus = EXIT_FAILURE;
1147
error(0, errno, "print_out_password");
1148
exitstatus = EX_IOERR;
683
1149
}
684
goto end;
1150
goto fallback;
685
1151
}
1152
686
1153
/* This process has not completed. Does it have any output? */
687
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1155
warning from
1156
-Wconversion */
688
1157
/* This process had nothing to say at this time */
1158
proc = proc->next;
689
1159
continue;
690
1160
}
691
1161
/* Before reading, make the process' data buffer large enough */
692
1162
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
693
1163
proc->buffer = realloc(proc->buffer, proc->buffer_size
694
1164
+ (size_t) BUFFER_SIZE);
695
if (proc->buffer == NULL){
696
perror("malloc");
697
exitstatus = EXIT_FAILURE;
698
goto end;
1165
if(proc->buffer == NULL){
1166
error(0, errno, "malloc");
1167
exitstatus = EX_OSERR;
1168
goto fallback;
699
1169
}
700
1170
proc->buffer_size += BUFFER_SIZE;
701
1171
}
702
1172
/* Read from the process */
703
ret = read(proc->fd, proc->buffer + proc->buffer_length,
704
BUFFER_SIZE);
705
if(ret < 0){
1173
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1174
proc->buffer
1175
+ proc->buffer_length,
1176
BUFFER_SIZE));
1177
if(sret < 0){
706
1178
/* Read error from this process; ignore the error */
1179
proc = proc->next;
707
1180
continue;
708
1181
}
709
if(ret == 0){
1182
if(sret == 0){
710
1183
/* got EOF */
711
1184
proc->eof = true;
712
1185
} else {
713
proc->buffer_length += (size_t) ret;
1186
proc->buffer_length += (size_t) sret;
714
1187
}
715
1188
}
716
1189
}
717
718
719
end:
720
721
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
722
/* Fallback if all plugins failed, none are found or an error occured */
1190
1191
1192
fallback:
1193
1194
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1195
and exitstatus != EX_OK)){
1196
/* Fallback if all plugins failed, none are found or an error
1197
occured */
723
1198
bool bret;
724
1199
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
725
1200
char *passwordbuffer = getpass("Password: ");
726
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1201
size_t len = strlen(passwordbuffer);
1202
/* Strip trailing newline */
1203
if(len > 0 and passwordbuffer[len-1] == '\n'){
1204
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1205
len--;
1206
}
1207
bret = print_out_password(passwordbuffer, len);
727
1208
if(not bret){
728
perror("print_out_password");
729
exitstatus = EXIT_FAILURE;
730
goto end;
1209
error(0, errno, "print_out_password");
1210
exitstatus = EX_IOERR;
731
1211
}
732
1212
}
733
1213
734
1214
/* Restore old signal handler */
735
sigaction(SIGCHLD, &old_sigchld_action, NULL);
736
737
free(plus_argv);
738
739
/* Free the plugin list */
740
for(plugin *next; plugin_list != NULL; plugin_list = next){
741
next = plugin_list->next;
742
free(plugin_list->argv);
743
free(plugin_list);
1215
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1216
if(ret == -1){
1217
error(0, errno, "sigaction");
1218
exitstatus = EX_OSERR;
1219
}
1220
1221
if(custom_argv != NULL){
1222
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1223
free(*arg);
1224
}
1225
free(custom_argv);
744
1226
}
745
1227
746
1228
if(dir != NULL){
747
1229
closedir(dir);
748
1230
}
749
1231
750
/* Free the process list and kill the processes */
751
for(process *next; process_list != NULL; process_list = next){
752
next = process_list->next;
753
close(process_list->fd);
754
ret = kill(process_list->pid, SIGTERM);
755
if(ret == -1 and errno != ESRCH){
756
/* set-uid proccesses migth not get closed */
757
perror("kill");
1232
/* Kill the processes */
1233
for(plugin *p = plugin_list; p != NULL; p = p->next){
1234
if(p->pid != 0){
1235
close(p->fd);
1236
ret = kill(p->pid, SIGTERM);
1237
if(ret == -1 and errno != ESRCH){
1238
/* Set-uid proccesses might not get closed */
1239
error(0, errno, "kill");
1240
}
758
1241
}
759
free(process_list->buffer);
760
free(process_list);
761
1242
}
762
1243
763
1244
/* Wait for any remaining child processes to terminate */
764
do{
1245
do {
765
1246
ret = wait(NULL);
766
1247
} while(ret >= 0);
767
1248
if(errno != ECHILD){
768
perror("wait");
1249
error(0, errno, "wait");
769
1250
}
770
1251
1252
free_plugin_list();
1253
1254
free(plugindir);
1255
free(argfile);
1256
771
1257
return exitstatus;
772
1258
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0