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- Committer: Björn Påhlsson
- Date: 2008-08-15 20:47:22 UTC
- mfrom: (76 mandos)
- mto: (237.7.1 mandos) (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 77.
- Revision ID: belorn@braxen-20080815204722-yvylhrvub57csggz
merge + minor adjustments
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
1
/* -*- coding: utf-8 -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
22
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
22
*/
24
23
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
27
26
#include <stddef.h> /* size_t, NULL */
28
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
36
35
uid_t, gid_t, getuid(), getgid(),
38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
40
WEXITSTATUS() */
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
53
51
close() */
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
53
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
54
#include <string.h> /* strsep, strlen(), strcpy(),
55
strcat() */
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
61
59
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
64
SIG_UNBLOCK, kill() */
69
65
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
66
72
67
#define BUFFER_SIZE 256
73
74
#define PDIR "/lib/mandos/plugins.d"
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
77
const char *argp_program_version = "plugin-runner " VERSION;
68
#define ARGFILE "/conf/conf.d/mandos/plugins.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
78
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
79
72
80
typedef struct plugin{
81
char *name; /* can be NULL or any plugin name */
82
char **argv;
83
int argc;
84
char **environ;
85
int envc;
86
bool disabled;
87
88
/* Variables used for running processes*/
73
struct process;
74
75
typedef struct process{
89
76
pid_t pid;
90
77
int fd;
91
78
char *buffer;
92
79
size_t buffer_size;
93
80
size_t buffer_length;
94
81
bool eof;
95
volatile sig_atomic_t completed;
82
bool completed;
96
83
int status;
84
struct process *next;
85
} process;
86
87
typedef struct plugin{
88
char *name; /* can be NULL or any plugin name */
89
char **argv;
90
int argc;
91
bool disabled;
97
92
struct plugin *next;
98
93
} plugin;
99
94
100
static plugin *plugin_list = NULL;
101
102
/* Gets an existing plugin based on name,
103
or if none is found, creates a new one */
104
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
95
static plugin *getplugin(char *name, plugin **plugin_list){
96
for (plugin *p = *plugin_list; p != NULL; p = p->next){
97
if ((p->name == name)
98
or (p->name and name and (strcmp(p->name, name) == 0))){
109
99
return p;
110
100
}
111
101
}
112
102
/* Create a new plugin */
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
118
return NULL;
119
}
120
char *copy_name = NULL;
121
if(name != NULL){
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
125
if(copy_name == NULL){
126
free(new_plugin);
127
return NULL;
128
}
129
}
130
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
135
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
140
free(copy_name);
141
free(new_plugin);
142
return NULL;
143
}
144
new_plugin->argv[0] = copy_name;
103
plugin *new_plugin = malloc(sizeof(plugin));
104
if (new_plugin == NULL){
105
perror("malloc");
106
exit(EXIT_FAILURE);
107
}
108
new_plugin->name = name;
109
new_plugin->argv = malloc(sizeof(char *) * 2);
110
if (new_plugin->argv == NULL){
111
perror("malloc");
112
exit(EXIT_FAILURE);
113
}
114
new_plugin->argv[0] = name;
145
115
new_plugin->argv[1] = NULL;
146
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
150
if(new_plugin->environ == NULL){
151
free(copy_name);
152
free(new_plugin->argv);
153
free(new_plugin);
154
return NULL;
155
}
156
new_plugin->environ[0] = NULL;
157
116
new_plugin->argc = 1;
117
new_plugin->disabled = false;
118
new_plugin->next = *plugin_list;
158
119
/* Append the new plugin to the list */
159
plugin_list = new_plugin;
120
*plugin_list = new_plugin;
160
121
return new_plugin;
161
122
}
162
123
163
/* Helper function for add_argument and add_environment */
164
static bool add_to_char_array(const char *new, char ***array,
165
int *len){
166
/* Resize the pointed-to array to hold one more pointer */
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
171
/* Malloc check */
172
if(*array == NULL){
173
return false;
174
}
175
/* Make a copy of the new string */
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
180
if(copy == NULL){
181
return false;
182
}
183
/* Insert the copy */
184
(*array)[*len] = copy;
185
(*len)++;
186
/* Add a new terminating NULL pointer to the last element */
187
(*array)[*len] = NULL;
188
return true;
189
}
190
191
/* Add to a plugin's argument vector */
192
static bool add_argument(plugin *p, const char *arg){
193
if(p == NULL){
194
return false;
195
}
196
return add_to_char_array(arg, &(p->argv), &(p->argc));
197
}
198
199
/* Add to a plugin's environment */
200
static bool add_environment(plugin *p, const char *def, bool replace){
201
if(p == NULL){
202
return false;
203
}
204
/* namelen = length of name of environment variable */
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
209
/* It already exists */
210
if(replace){
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
216
return false;
217
}
218
*e = new;
219
strcpy(*e, def);
220
}
221
return true;
222
}
223
}
224
return add_to_char_array(def, &(p->environ), &(p->envc));
124
static void addargument(plugin *p, char *arg){
125
p->argv[p->argc] = arg;
126
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
127
if (p->argv == NULL){
128
perror("malloc");
129
exit(EXIT_FAILURE);
130
}
131
p->argc++;
132
p->argv[p->argc] = NULL;
225
133
}
226
134
227
135
/*
228
136
* Based on the example in the GNU LibC manual chapter 13.13 "File
229
137
* Descriptor Flags".
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
138
* *Note File Descriptor Flags:(libc)Descriptor Flags.
231
139
*/
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
140
static int set_cloexec_flag(int fd)
141
{
142
int ret = fcntl(fd, F_GETFD, 0);
234
143
/* If reading the flags failed, return error indication now. */
235
144
if(ret < 0){
236
145
return ret;
237
146
}
238
147
/* Store modified flag word in the descriptor. */
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
148
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
241
149
}
242
150
151
process *process_list = NULL;
243
152
244
/* Mark processes as completed when they exit, and save their exit
153
/* Mark a process as completed when it exits, and save its exit
245
154
status. */
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
248
while(true){
249
plugin *proc = plugin_list;
250
int status;
251
pid_t pid = waitpid(-1, &status, WNOHANG);
252
if(pid == 0){
253
/* Only still running child processes */
254
break;
255
}
256
if(pid == -1){
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
260
}
261
perror("waitpid");
262
}
263
264
/* A child exited, find it in process_list */
265
while(proc != NULL and proc->pid != pid){
266
proc = proc->next;
267
}
268
if(proc == NULL){
269
/* Process not found in process list */
270
continue;
271
}
272
proc->status = status;
273
proc->completed = 1;
274
}
275
errno = old_errno;
155
void handle_sigchld(__attribute__((unused)) int sig){
156
process *proc = process_list;
157
int status;
158
pid_t pid = wait(&status);
159
if(pid == -1){
160
perror("wait");
161
return;
162
}
163
while(proc != NULL and proc->pid != pid){
164
proc = proc->next;
165
}
166
if(proc == NULL){
167
/* Process not found in process list */
168
return;
169
}
170
proc->status = status;
171
proc->completed = true;
276
172
}
277
173
278
/* Prints out a password to stdout */
279
static bool print_out_password(const char *buffer, size_t length){
174
bool print_out_password(const char *buffer, size_t length){
280
175
ssize_t ret;
176
if(length>0 and buffer[length-1] == '\n'){
177
length--;
178
}
281
179
for(size_t written = 0; written < length; written += (size_t)ret){
282
180
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
283
181
length - written));
288
186
return true;
289
187
}
290
188
291
/* Removes and free a plugin from the plugin list */
292
static void free_plugin(plugin *plugin_node){
293
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
295
free(*arg);
296
}
297
free(plugin_node->argv);
298
for(char **env = plugin_node->environ; *env != NULL; env++){
299
free(*env);
300
}
301
free(plugin_node->environ);
302
free(plugin_node->buffer);
303
304
/* Removes the plugin from the singly-linked list */
305
if(plugin_node == plugin_list){
306
/* First one - simple */
307
plugin_list = plugin_list->next;
308
} else {
309
/* Second one or later */
310
for(plugin *p = plugin_list; p != NULL; p = p->next){
311
if(p->next == plugin_node){
312
p->next = plugin_node->next;
313
break;
314
}
189
char ** addcustomargument(char **argv, int *argc, char *arg){
190
191
if (argv == NULL){
192
*argc = 1;
193
argv = malloc(sizeof(char*) * 2);
194
if(argv == NULL){
195
return NULL;
315
196
}
316
}
317
318
free(plugin_node);
319
}
320
321
static void free_plugin_list(void){
322
while(plugin_list != NULL){
323
free_plugin(plugin_list);
324
}
197
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
198
argv[1] = NULL;
199
}
200
*argc += 1;
201
argv = realloc(argv, sizeof(char *)
202
* ((unsigned int) *argc + 1));
203
if(argv == NULL){
204
return NULL;
205
}
206
argv[*argc-1] = arg;
207
argv[*argc] = NULL;
208
return argv;
325
209
}
326
210
327
211
int main(int argc, char *argv[]){
328
char *plugindir = NULL;
329
char *argfile = NULL;
212
const char *plugindir = "/lib/mandos/plugins.d";
213
const char *argfile = ARGFILE;
330
214
FILE *conffp;
331
215
size_t d_name_len;
332
216
DIR *dir = NULL;
334
218
struct stat st;
335
219
fd_set rfds_all;
336
220
int ret, maxfd = 0;
337
ssize_t sret;
338
221
uid_t uid = 65534;
339
222
gid_t gid = 65534;
340
223
bool debug = false;
348
231
/* Establish a signal handler */
349
232
sigemptyset(&sigchld_action.sa_mask);
350
233
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
351
if(ret == -1){
234
if(ret < 0){
352
235
perror("sigaddset");
353
exitstatus = EXIT_FAILURE;
354
goto fallback;
236
exit(EXIT_FAILURE);
355
237
}
356
238
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
357
if(ret == -1){
239
if(ret < 0){
358
240
perror("sigaction");
359
exitstatus = EXIT_FAILURE;
360
goto fallback;
241
exit(EXIT_FAILURE);
361
242
}
362
243
363
244
/* The options we understand. */
365
246
{ .name = "global-options", .key = 'g',
366
247
.arg = "OPTION[,OPTION[,...]]",
367
248
.doc = "Options passed to all plugins" },
368
{ .name = "global-env", .key = 'G',
369
.arg = "VAR=value",
370
.doc = "Environment variable passed to all plugins" },
371
249
{ .name = "options-for", .key = 'o',
372
250
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
373
251
.doc = "Options passed only to specified plugin" },
374
{ .name = "env-for", .key = 'E',
375
.arg = "PLUGIN:ENV=value",
376
.doc = "Environment variable passed to specified plugin" },
377
252
{ .name = "disable", .key = 'd',
378
253
.arg = "PLUGIN",
379
254
.doc = "Disable a specific plugin", .group = 1 },
380
{ .name = "enable", .key = 'e',
381
.arg = "PLUGIN",
382
.doc = "Enable a specific plugin", .group = 1 },
383
255
{ .name = "plugin-dir", .key = 128,
384
256
.arg = "DIRECTORY",
385
257
.doc = "Specify a different plugin directory", .group = 2 },
386
{ .name = "config-file", .key = 129,
387
.arg = "FILE",
388
.doc = "Specify a different configuration file", .group = 2 },
389
{ .name = "userid", .key = 130,
390
.arg = "ID", .flags = 0,
391
.doc = "User ID the plugins will run as", .group = 3 },
392
{ .name = "groupid", .key = 131,
393
.arg = "ID", .flags = 0,
394
.doc = "Group ID the plugins will run as", .group = 3 },
395
{ .name = "debug", .key = 132,
396
.doc = "Debug mode", .group = 4 },
258
{ .name = "userid", .key = 129,
259
.arg = "ID", .flags = 0,
260
.doc = "User ID the plugins will run as", .group = 2 },
261
{ .name = "groupid", .key = 130,
262
.arg = "ID", .flags = 0,
263
.doc = "Group ID the plugins will run as", .group = 2 },
264
{ .name = "debug", .key = 131,
265
.doc = "Debug mode", .group = 3 },
397
266
{ .name = NULL }
398
267
};
399
268
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
405
case 'g': /* --global-options */
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
269
error_t parse_opt (int key, char *arg, struct argp_state *state) {
270
/* Get the INPUT argument from `argp_parse', which we know is a
271
pointer to our plugin list pointer. */
272
plugin **plugins = state->input;
273
switch (key) {
274
case 'g':
275
if (arg != NULL){
276
char *p;
277
while((p = strsep(&arg, ",")) != NULL){
278
if(p[0] == '\0'){
410
279
continue;
411
280
}
412
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
415
}
416
}
417
}
418
break;
419
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
425
}
426
break;
427
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
438
}
439
}
440
}
441
break;
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
{
447
char *envdef = strchr(arg, ':');
448
if(envdef == NULL){
449
break;
450
}
451
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
454
}
455
}
456
break;
457
case 'd': /* --disable */
458
if(arg != NULL){
459
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
462
}
463
p->disabled = true;
464
}
465
break;
466
case 'e': /* --enable */
467
if(arg != NULL){
468
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
471
}
472
p->disabled = false;
473
}
474
break;
475
case 128: /* --plugin-dir */
476
free(plugindir);
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
break;
482
case 129: /* --config-file */
483
/* This is already done by parse_opt_config_file() */
484
break;
485
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
495
break;
496
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
506
break;
507
case 132: /* --debug */
281
addargument(getplugin(NULL, plugins), p);
282
}
283
}
284
break;
285
case 'o':
286
if (arg != NULL){
287
char *name = strsep(&arg, ":");
288
if(name[0] == '\0'){
289
break;
290
}
291
char *opt = strsep(&arg, ":");
292
if(opt[0] == '\0'){
293
break;
294
}
295
if(opt != NULL){
296
char *p;
297
while((p = strsep(&opt, ",")) != NULL){
298
if(p[0] == '\0'){
299
continue;
300
}
301
addargument(getplugin(name, plugins), p);
302
}
303
}
304
}
305
break;
306
case 'd':
307
if (arg != NULL){
308
getplugin(arg, plugins)->disabled = true;
309
}
310
break;
311
case 128:
312
plugindir = arg;
313
break;
314
case 129:
315
uid = (uid_t)strtol(arg, NULL, 10);
316
break;
317
case 130:
318
gid = (gid_t)strtol(arg, NULL, 10);
319
break;
320
case 131:
508
321
debug = true;
509
322
break;
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
514
case ARGP_KEY_ARG:
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
default:
525
return ARGP_ERR_UNKNOWN;
526
}
527
return 0;
528
}
529
530
/* This option parser is the same as parse_opt() above, except it
531
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
536
case 'g': /* --global-options */
537
case 'G': /* --global-env */
538
case 'o': /* --options-for */
539
case 'E': /* --env-for */
540
case 'd': /* --disable */
541
case 'e': /* --enable */
542
case 128: /* --plugin-dir */
543
break;
544
case 129: /* --config-file */
545
free(argfile);
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
break;
551
case 130: /* --userid */
552
case 131: /* --groupid */
553
case 132: /* --debug */
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
break;
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return 0;
561
}
562
563
struct argp argp = { .options = options,
564
.parser = parse_opt_config_file,
565
.args_doc = "",
323
case ARGP_KEY_ARG:
324
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
325
break;
326
case ARGP_KEY_END:
327
break;
328
default:
329
return ARGP_ERR_UNKNOWN;
330
}
331
return 0;
332
}
333
334
plugin *plugin_list = NULL;
335
336
struct argp argp = { .options = options, .parser = parse_opt,
337
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
566
338
.doc = "Mandos plugin runner -- Run plugins" };
567
339
568
/* Parse using parse_opt_config_file() in order to get the custom
569
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
340
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
341
if (ret == ARGP_ERR_UNKNOWN){
572
342
fprintf(stderr, "Unknown error while parsing arguments\n");
573
343
exitstatus = EXIT_FAILURE;
574
goto fallback;
575
}
576
577
/* Reset to the normal argument parser */
578
argp.parser = parse_opt;
579
580
/* Open the configfile if available */
581
if(argfile == NULL){
582
conffp = fopen(AFILE, "r");
583
} else {
584
conffp = fopen(argfile, "r");
585
}
344
goto end;
345
}
346
347
conffp = fopen(argfile, "r");
586
348
if(conffp != NULL){
587
349
char *org_line = NULL;
350
size_t size = 0;
351
ssize_t sret;
588
352
char *p, *arg, *new_arg, *line;
589
size_t size = 0;
590
353
const char whitespace_delims[] = " \r\t\f\v\n";
591
354
const char comment_delim[] = "#";
592
593
custom_argc = 1;
594
custom_argv = malloc(sizeof(char*) * 2);
595
if(custom_argv == NULL){
596
perror("malloc");
597
exitstatus = EXIT_FAILURE;
598
goto fallback;
599
}
600
custom_argv[0] = argv[0];
601
custom_argv[1] = NULL;
602
603
/* for each line in the config file, strip whitespace and ignore
604
commented text */
355
605
356
while(true){
606
357
sret = getline(&org_line, &size, conffp);
607
358
if(sret == -1){
608
359
break;
609
360
}
610
361
611
362
line = org_line;
612
363
arg = strsep(&line, comment_delim);
613
364
while((p = strsep(&arg, whitespace_delims)) != NULL){
615
366
continue;
616
367
}
617
368
new_arg = strdup(p);
618
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
621
free(org_line);
622
goto fallback;
623
}
624
625
custom_argc += 1;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
633
}
634
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
369
custom_argv = addcustomargument(custom_argv, &custom_argc, new_arg);
370
if (custom_argv == NULL){
371
perror("addcustomargument");
372
exitstatus = EXIT_FAILURE;
373
goto end;
374
}
636
375
}
637
376
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
646
377
free(org_line);
647
} else {
378
} else{
648
379
/* Check for harmful errors and go to fallback. Other errors might
649
380
not affect opening plugins */
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
381
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
382
perror("fopen");
652
383
exitstatus = EXIT_FAILURE;
653
goto fallback;
384
goto end;
654
385
}
655
386
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
387
658
388
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
389
custom_argv[0] = argv[0];
390
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
391
if (ret == ARGP_ERR_UNKNOWN){
662
392
fprintf(stderr, "Unknown error while parsing arguments\n");
663
393
exitstatus = EXIT_FAILURE;
664
goto fallback;
394
goto end;
665
395
}
666
396
}
667
397
668
/* Parse actual command line arguments, to let them override the
669
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
675
}
676
677
398
if(debug){
678
399
for(plugin *p = plugin_list; p != NULL; p=p->next){
679
400
fprintf(stderr, "Plugin: %s has %d arguments\n",
681
402
for(char **a = p->argv; *a != NULL; a++){
682
403
fprintf(stderr, "\tArg: %s\n", *a);
683
404
}
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
685
for(char **a = p->environ; *a != NULL; a++){
686
fprintf(stderr, "\t%s\n", *a);
687
}
688
405
}
689
406
}
690
407
691
/* Strip permissions down to nobody */
408
ret = setuid(uid);
409
if (ret == -1){
410
perror("setuid");
411
}
412
692
413
setgid(gid);
693
if(ret == -1){
414
if (ret == -1){
694
415
perror("setgid");
695
416
}
696
ret = setuid(uid);
697
if(ret == -1){
698
perror("setuid");
417
418
dir = opendir(plugindir);
419
if(dir == NULL){
420
perror("Could not open plugin dir");
421
exitstatus = EXIT_FAILURE;
422
goto end;
699
423
}
700
424
701
/* Open plugin directory with close_on_exec flag */
425
/* Set the FD_CLOEXEC flag on the directory, if possible */
702
426
{
703
int dir_fd = -1;
704
if(plugindir == NULL){
705
dir_fd = open(PDIR, O_RDONLY |
706
#ifdef O_CLOEXEC
707
O_CLOEXEC
708
#else /* not O_CLOEXEC */
709
0
710
#endif /* not O_CLOEXEC */
711
);
712
} else {
713
dir_fd = open(plugindir, O_RDONLY |
714
#ifdef O_CLOEXEC
715
O_CLOEXEC
716
#else /* not O_CLOEXEC */
717
0
718
#endif /* not O_CLOEXEC */
719
);
720
}
721
if(dir_fd == -1){
722
perror("Could not open plugin dir");
723
exitstatus = EXIT_FAILURE;
724
goto fallback;
725
}
726
727
#ifndef O_CLOEXEC
728
/* Set the FD_CLOEXEC flag on the directory */
729
ret = set_cloexec_flag(dir_fd);
730
if(ret < 0){
731
perror("set_cloexec_flag");
732
TEMP_FAILURE_RETRY(close(dir_fd));
733
exitstatus = EXIT_FAILURE;
734
goto fallback;
735
}
736
#endif /* O_CLOEXEC */
737
738
dir = fdopendir(dir_fd);
739
if(dir == NULL){
740
perror("Could not open plugin dir");
741
TEMP_FAILURE_RETRY(close(dir_fd));
742
exitstatus = EXIT_FAILURE;
743
goto fallback;
427
int dir_fd = dirfd(dir);
428
if(dir_fd >= 0){
429
ret = set_cloexec_flag(dir_fd);
430
if(ret < 0){
431
perror("set_cloexec_flag");
432
exitstatus = EXIT_FAILURE;
433
goto end;
434
}
744
435
}
745
436
}
746
437
747
438
FD_ZERO(&rfds_all);
748
439
749
/* Read and execute any executable in the plugin directory*/
750
440
while(true){
751
do {
752
dirst = readdir(dir);
753
} while(dirst == NULL and errno == EINTR);
441
dirst = readdir(dir);
754
442
755
/* All directory entries have been processed */
443
// All directory entries have been processed
756
444
if(dirst == NULL){
757
if(errno == EBADF){
445
if (errno == EBADF){
758
446
perror("readdir");
759
447
exitstatus = EXIT_FAILURE;
760
goto fallback;
448
goto end;
761
449
}
762
450
break;
763
451
}
764
452
765
453
d_name_len = strlen(dirst->d_name);
766
454
767
/* Ignore dotfiles, backup files and other junk */
455
// Ignore dotfiles, backup files and other junk
768
456
{
769
457
bool bad_name = false;
770
458
772
460
773
461
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
774
462
".dpkg-old",
775
".dpkg-bak",
776
463
".dpkg-divert", NULL };
777
464
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
778
465
size_t pre_len = strlen(*pre);
786
473
break;
787
474
}
788
475
}
476
789
477
if(bad_name){
790
478
continue;
791
479
}
480
792
481
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
793
482
size_t suf_len = strlen(*suf);
794
483
if((d_name_len >= suf_len)
808
497
}
809
498
}
810
499
811
char *filename;
812
if(plugindir == NULL){
813
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
814
dirst->d_name));
815
} else {
816
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
817
plugindir,
818
dirst->d_name));
819
}
820
if(ret < 0){
821
perror("asprintf");
500
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
501
if (filename == NULL){
502
perror("malloc");
822
503
continue;
823
504
}
505
strcpy(filename, plugindir); /* Spurious warning */
506
strcat(filename, "/"); /* Spurious warning */
507
strcat(filename, dirst->d_name); /* Spurious warning */
824
508
825
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
826
if(ret == -1){
509
ret = stat(filename, &st);
510
if (ret == -1){
827
511
perror("stat");
828
512
free(filename);
829
513
continue;
830
514
}
831
515
832
/* Ignore non-executable files */
833
if(not S_ISREG(st.st_mode)
834
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
516
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
835
517
if(debug){
836
518
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
837
519
" with bad type or mode\n", filename);
839
521
free(filename);
840
522
continue;
841
523
}
842
843
plugin *p = getplugin(dirst->d_name);
844
if(p == NULL){
845
perror("getplugin");
846
free(filename);
847
continue;
848
}
849
if(p->disabled){
524
if(getplugin(dirst->d_name, &plugin_list)->disabled){
850
525
if(debug){
851
526
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
852
527
dirst->d_name);
854
529
free(filename);
855
530
continue;
856
531
}
532
plugin *p = getplugin(dirst->d_name, &plugin_list);
857
533
{
858
534
/* Add global arguments to argument list for this plugin */
859
plugin *g = getplugin(NULL);
860
if(g != NULL){
861
for(char **a = g->argv + 1; *a != NULL; a++){
862
if(not add_argument(p, *a)){
863
perror("add_argument");
864
}
865
}
866
/* Add global environment variables */
867
for(char **e = g->environ; *e != NULL; e++){
868
if(not add_environment(p, *e, false)){
869
perror("add_environment");
870
}
871
}
872
}
873
}
874
/* If this plugin has any environment variables, we will call
875
using execve and need to duplicate the environment from this
876
process, too. */
877
if(p->environ[0] != NULL){
878
for(char **e = environ; *e != NULL; e++){
879
if(not add_environment(p, *e, false)){
880
perror("add_environment");
881
}
882
}
883
}
884
885
int pipefd[2];
886
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
887
if(ret == -1){
535
plugin *g = getplugin(NULL, &plugin_list);
536
for(char **a = g->argv + 1; *a != NULL; a++){
537
addargument(p, *a);
538
}
539
}
540
int pipefd[2];
541
ret = pipe(pipefd);
542
if (ret == -1){
888
543
perror("pipe");
889
544
exitstatus = EXIT_FAILURE;
890
goto fallback;
545
goto end;
891
546
}
892
/* Ask OS to automatic close the pipe on exec */
893
547
ret = set_cloexec_flag(pipefd[0]);
894
548
if(ret < 0){
895
549
perror("set_cloexec_flag");
896
550
exitstatus = EXIT_FAILURE;
897
goto fallback;
551
goto end;
898
552
}
899
553
ret = set_cloexec_flag(pipefd[1]);
900
554
if(ret < 0){
901
555
perror("set_cloexec_flag");
902
556
exitstatus = EXIT_FAILURE;
903
goto fallback;
557
goto end;
904
558
}
905
559
/* Block SIGCHLD until process is safely in process list */
906
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
907
&sigchld_action.sa_mask,
908
NULL));
560
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
909
561
if(ret < 0){
910
562
perror("sigprocmask");
911
563
exitstatus = EXIT_FAILURE;
912
goto fallback;
564
goto end;
913
565
}
914
/* Starting a new process to be watched */
915
pid_t pid;
916
do {
917
pid = fork();
918
} while(pid == -1 and errno == EINTR);
566
// Starting a new process to be watched
567
pid_t pid = fork();
919
568
if(pid == -1){
920
569
perror("fork");
921
570
exitstatus = EXIT_FAILURE;
922
goto fallback;
571
goto end;
923
572
}
924
573
if(pid == 0){
925
574
/* this is the child process */
928
577
perror("sigaction");
929
578
_exit(EXIT_FAILURE);
930
579
}
931
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
580
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
932
581
if(ret < 0){
933
582
perror("sigprocmask");
934
583
_exit(EXIT_FAILURE);
935
584
}
936
585
937
586
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
938
587
if(ret == -1){
939
588
perror("dup2");
945
594
above and must now close it manually here. */
946
595
closedir(dir);
947
596
}
948
if(p->environ[0] == NULL){
949
if(execv(filename, p->argv) < 0){
950
perror("execv");
951
_exit(EXIT_FAILURE);
952
}
953
} else {
954
if(execve(filename, p->argv, p->environ) < 0){
955
perror("execve");
956
_exit(EXIT_FAILURE);
957
}
597
if(execv(filename, p->argv) < 0){
598
perror("execv");
599
_exit(EXIT_FAILURE);
958
600
}
959
601
/* no return */
960
602
}
961
/* Parent process */
962
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
963
pipe */
603
/* parent process */
964
604
free(filename);
965
plugin *new_plugin = getplugin(dirst->d_name);
966
if(new_plugin == NULL){
967
perror("getplugin");
968
ret = (int)(TEMP_FAILURE_RETRY
969
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
970
NULL)));
605
close(pipefd[1]); /* close unused write end of pipe */
606
process *new_process = malloc(sizeof(process));
607
if (new_process == NULL){
608
perror("malloc");
609
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
971
610
if(ret < 0){
972
perror("sigprocmask");
611
perror("sigprocmask");
973
612
}
974
613
exitstatus = EXIT_FAILURE;
975
goto fallback;
614
goto end;
976
615
}
977
616
978
new_plugin->pid = pid;
979
new_plugin->fd = pipefd[0];
980
617
*new_process = (struct process){ .pid = pid,
618
.fd = pipefd[0],
619
.next = process_list };
620
// List handling
621
process_list = new_process;
981
622
/* Unblock SIGCHLD so signal handler can be run if this process
982
623
has already completed */
983
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
984
&sigchld_action.sa_mask,
985
NULL));
624
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
986
625
if(ret < 0){
987
626
perror("sigprocmask");
988
627
exitstatus = EXIT_FAILURE;
989
goto fallback;
990
}
991
992
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
993
-Wconversion */
994
995
if(maxfd < new_plugin->fd){
996
maxfd = new_plugin->fd;
997
}
998
}
999
1000
TEMP_FAILURE_RETRY(closedir(dir));
628
goto end;
629
}
630
631
FD_SET(new_process->fd, &rfds_all);
632
633
if (maxfd < new_process->fd){
634
maxfd = new_process->fd;
635
}
636
637
}
638
639
/* Free the plugin list */
640
for(plugin *next; plugin_list != NULL; plugin_list = next){
641
next = plugin_list->next;
642
free(plugin_list->argv);
643
free(plugin_list);
644
}
645
646
closedir(dir);
1001
647
dir = NULL;
1002
free_plugin(getplugin(NULL));
1003
1004
for(plugin *p = plugin_list; p != NULL; p = p->next){
1005
if(p->pid != 0){
1006
break;
1007
}
1008
if(p->next == NULL){
1009
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1010
" directory?\n");
1011
free_plugin_list();
1012
}
648
649
if (process_list == NULL){
650
fprintf(stderr, "No plugin processes started. Incorrect plugin"
651
" directory?\n");
652
process_list = NULL;
1013
653
}
1014
1015
/* Main loop while running plugins exist */
1016
while(plugin_list){
654
while(process_list){
1017
655
fd_set rfds = rfds_all;
1018
656
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1019
if(select_ret == -1 and errno != EINTR){
657
if (select_ret == -1){
1020
658
perror("select");
1021
659
exitstatus = EXIT_FAILURE;
1022
goto fallback;
660
goto end;
1023
661
}
1024
662
/* OK, now either a process completed, or something can be read
1025
663
from one of them */
1026
for(plugin *proc = plugin_list; proc != NULL;){
664
for(process *proc = process_list; proc ; proc = proc->next){
1027
665
/* Is this process completely done? */
1028
if(proc->completed and proc->eof){
666
if(proc->eof and proc->completed){
1029
667
/* Only accept the plugin output if it exited cleanly */
1030
668
if(not WIFEXITED(proc->status)
1031
669
or WEXITSTATUS(proc->status) != 0){
1032
670
/* Bad exit by plugin */
1033
1034
671
if(debug){
1035
672
if(WIFEXITED(proc->status)){
1036
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1037
" status %d\n", proc->name,
1038
(intmax_t) (proc->pid),
673
fprintf(stderr, "Plugin %u exited with status %d\n",
674
(unsigned int) (proc->pid),
1039
675
WEXITSTATUS(proc->status));
1040
} else if(WIFSIGNALED(proc->status)){
1041
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1042
" signal %d: %s\n", proc->name,
1043
(intmax_t) (proc->pid),
1044
WTERMSIG(proc->status),
1045
strsignal(WTERMSIG(proc->status)));
676
} else if(WIFSIGNALED(proc->status)) {
677
fprintf(stderr, "Plugin %u killed by signal %d\n",
678
(unsigned int) (proc->pid),
679
WTERMSIG(proc->status));
1046
680
} else if(WCOREDUMP(proc->status)){
1047
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1048
" core\n", proc->name, (intmax_t) (proc->pid));
681
fprintf(stderr, "Plugin %d dumped core\n",
682
(unsigned int) (proc->pid));
1049
683
}
1050
684
}
1051
1052
685
/* Remove the plugin */
1053
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1054
-Wconversion */
1055
686
FD_CLR(proc->fd, &rfds_all);
1056
687
/* Block signal while modifying process_list */
1057
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1058
(SIG_BLOCK,
1059
&sigchld_action.sa_mask,
1060
NULL));
688
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1061
689
if(ret < 0){
1062
690
perror("sigprocmask");
1063
691
exitstatus = EXIT_FAILURE;
1064
goto fallback;
1065
}
1066
1067
plugin *next_plugin = proc->next;
1068
free_plugin(proc);
1069
proc = next_plugin;
1070
692
goto end;
693
}
694
/* Delete this process entry from the list */
695
if(process_list == proc){
696
/* First one - simple */
697
process_list = proc->next;
698
} else {
699
/* Second one or later */
700
for(process *p = process_list; p != NULL; p = p->next){
701
if(p->next == proc){
702
p->next = proc->next;
703
break;
704
}
705
}
706
}
1071
707
/* We are done modifying process list, so unblock signal */
1072
ret = (int)(TEMP_FAILURE_RETRY
1073
(sigprocmask(SIG_UNBLOCK,
1074
&sigchld_action.sa_mask, NULL)));
708
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
709
NULL);
1075
710
if(ret < 0){
1076
711
perror("sigprocmask");
1077
exitstatus = EXIT_FAILURE;
1078
goto fallback;
1079
}
1080
1081
if(plugin_list == NULL){
1082
break;
1083
}
1084
1085
continue;
712
}
713
free(proc->buffer);
714
free(proc);
715
/* We deleted this process from the list, so we can't go
716
proc->next. Therefore, start over from the beginning of
717
the process list */
718
break;
1086
719
}
1087
1088
720
/* This process exited nicely, so print its buffer */
1089
1090
bool bret = print_out_password(proc->buffer,
1091
proc->buffer_length);
721
722
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1092
723
if(not bret){
1093
724
perror("print_out_password");
1094
725
exitstatus = EXIT_FAILURE;
1095
726
}
1096
goto fallback;
727
goto end;
1097
728
}
1098
1099
729
/* This process has not completed. Does it have any output? */
1100
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1101
warning from
1102
-Wconversion */
730
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1103
731
/* This process had nothing to say at this time */
1104
proc = proc->next;
1105
732
continue;
1106
733
}
1107
734
/* Before reading, make the process' data buffer large enough */
1108
735
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1109
736
proc->buffer = realloc(proc->buffer, proc->buffer_size
1110
737
+ (size_t) BUFFER_SIZE);
1111
if(proc->buffer == NULL){
738
if (proc->buffer == NULL){
1112
739
perror("malloc");
1113
740
exitstatus = EXIT_FAILURE;
1114
goto fallback;
741
goto end;
1115
742
}
1116
743
proc->buffer_size += BUFFER_SIZE;
1117
744
}
1118
745
/* Read from the process */
1119
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1120
proc->buffer
1121
+ proc->buffer_length,
1122
BUFFER_SIZE));
1123
if(sret < 0){
746
ret = read(proc->fd, proc->buffer + proc->buffer_length,
747
BUFFER_SIZE);
748
if(ret < 0){
1124
749
/* Read error from this process; ignore the error */
1125
proc = proc->next;
1126
750
continue;
1127
751
}
1128
if(sret == 0){
752
if(ret == 0){
1129
753
/* got EOF */
1130
754
proc->eof = true;
1131
755
} else {
1132
proc->buffer_length += (size_t) sret;
756
proc->buffer_length += (size_t) ret;
1133
757
}
1134
758
}
1135
759
}
1136
1137
1138
fallback:
1139
1140
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1141
/* Fallback if all plugins failed, none are found or an error
1142
occured */
760
761
762
end:
763
764
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
765
/* Fallback if all plugins failed, none are found or an error occured */
1143
766
bool bret;
1144
767
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1145
768
char *passwordbuffer = getpass("Password: ");
1146
size_t len = strlen(passwordbuffer);
1147
/* Strip trailing newline */
1148
if(len > 0 and passwordbuffer[len-1] == '\n'){
1149
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1150
len--;
1151
}
1152
bret = print_out_password(passwordbuffer, len);
769
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1153
770
if(not bret){
1154
771
perror("print_out_password");
1155
772
exitstatus = EXIT_FAILURE;
773
goto end;
1156
774
}
1157
775
}
1158
776
1159
777
/* Restore old signal handler */
1160
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1161
if(ret == -1){
1162
perror("sigaction");
1163
exitstatus = EXIT_FAILURE;
1164
}
1165
1166
if(custom_argv != NULL){
1167
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1168
free(*arg);
1169
}
1170
free(custom_argv);
778
sigaction(SIGCHLD, &old_sigchld_action, NULL);
779
780
free(custom_argv);
781
782
/* Free the plugin list */
783
for(plugin *next; plugin_list != NULL; plugin_list = next){
784
next = plugin_list->next;
785
free(plugin_list->argv);
786
free(plugin_list);
1171
787
}
1172
788
1173
789
if(dir != NULL){
1174
790
closedir(dir);
1175
791
}
1176
792
1177
/* Kill the processes */
1178
for(plugin *p = plugin_list; p != NULL; p = p->next){
1179
if(p->pid != 0){
1180
close(p->fd);
1181
ret = kill(p->pid, SIGTERM);
1182
if(ret == -1 and errno != ESRCH){
1183
/* Set-uid proccesses might not get closed */
1184
perror("kill");
1185
}
793
/* Free the process list and kill the processes */
794
for(process *next; process_list != NULL; process_list = next){
795
next = process_list->next;
796
close(process_list->fd);
797
ret = kill(process_list->pid, SIGTERM);
798
if(ret == -1 and errno != ESRCH){
799
/* set-uid proccesses migth not get closed */
800
perror("kill");
1186
801
}
802
free(process_list->buffer);
803
free(process_list);
1187
804
}
1188
805
1189
806
/* Wait for any remaining child processes to terminate */
1190
do {
807
do{
1191
808
ret = wait(NULL);
1192
809
} while(ret >= 0);
1193
810
if(errno != ECHILD){
1194
811
perror("wait");
1195
812
}
1196
813
1197
free_plugin_list();
1198
1199
free(plugindir);
1200
free(argfile);
1201
1202
814
return exitstatus;
1203
815
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0