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- Committer: teddy at bsnet
- Date: 2010-08-23 19:23:15 UTC
- mto: (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100823192315-pefgye0l6cavcejs
* debian/control (mandos/Depends): Added "python-urwid".
* mandos (Client.approved_by_default): Changed default to "True".
(Client.approved_delay): Changed default to "0s".
(ClientDBus.GotSecret, ClientDBus.Rejected,
ClientDBus.NeedApproval): Emit "PropertyChanged" signal for the
"approved_pending" property.
* mandos (Client.approved_by_default): Changed default to "True".
(Client.approved_delay): Changed default to "0s".
(ClientDBus.GotSecret, ClientDBus.Rejected,
ClientDBus.NeedApproval): Emit "PropertyChanged" signal for the
"approved_pending" property.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- plugins.d/usplash
- files renamed:
- 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 © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 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
22
23
*/
23
24
24
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
25
asprintf() */
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> /* perror, 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> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
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 */
66
73
67
74
#define BUFFER_SIZE 256
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
75
76
#define PDIR "/lib/mandos/plugins.d"
77
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
78
79
const char *argp_program_version = "plugin-runner " VERSION;
71
80
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
72
81
73
struct process;
74
75
typedef struct process{
76
pid_t pid;
77
int fd;
78
char *buffer;
79
size_t buffer_size;
80
size_t buffer_length;
81
bool eof;
82
volatile bool completed;
83
volatile int status;
84
struct process *next;
85
} process;
86
87
82
typedef struct plugin{
88
83
char *name; /* can be NULL or any plugin name */
89
84
char **argv;
91
86
char **environ;
92
87
int envc;
93
88
bool disabled;
89
90
/* Variables used for running processes*/
91
pid_t pid;
92
int fd;
93
char *buffer;
94
size_t buffer_size;
95
size_t buffer_length;
96
bool eof;
97
volatile sig_atomic_t completed;
98
int status;
94
99
struct plugin *next;
95
100
} plugin;
96
101
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
99
if ((p->name == name)
100
or (p->name and name and (strcmp(p->name, name) == 0))){
102
static plugin *plugin_list = NULL;
103
104
/* Gets an existing plugin based on name,
105
or if none is found, creates a new one */
106
static plugin *getplugin(char *name){
107
/* Check for existing plugin with that name */
108
for(plugin *p = plugin_list; p != NULL; p = p->next){
109
if((p->name == name)
110
or (p->name and name and (strcmp(p->name, name) == 0))){
101
111
return p;
102
112
}
103
113
}
104
114
/* Create a new plugin */
105
plugin *new_plugin = malloc(sizeof(plugin));
106
if (new_plugin == NULL){
115
plugin *new_plugin = NULL;
116
do {
117
new_plugin = malloc(sizeof(plugin));
118
} while(new_plugin == NULL and errno == EINTR);
119
if(new_plugin == NULL){
107
120
return NULL;
108
121
}
109
122
char *copy_name = NULL;
110
123
if(name != NULL){
111
copy_name = strdup(name);
124
do {
125
copy_name = strdup(name);
126
} while(copy_name == NULL and errno == EINTR);
112
127
if(copy_name == NULL){
128
int e = errno;
129
free(new_plugin);
130
errno = e;
113
131
return NULL;
114
132
}
115
133
}
116
134
117
*new_plugin = (plugin) { .name = copy_name,
118
.argc = 1,
119
.envc = 0,
120
.disabled = false,
121
.next = *plugin_list };
135
*new_plugin = (plugin){ .name = copy_name,
136
.argc = 1,
137
.disabled = false,
138
.next = plugin_list };
122
139
123
new_plugin->argv = malloc(sizeof(char *) * 2);
124
if (new_plugin->argv == NULL){
140
do {
141
new_plugin->argv = malloc(sizeof(char *) * 2);
142
} while(new_plugin->argv == NULL and errno == EINTR);
143
if(new_plugin->argv == NULL){
144
int e = errno;
125
145
free(copy_name);
126
146
free(new_plugin);
147
errno = e;
127
148
return NULL;
128
149
}
129
150
new_plugin->argv[0] = copy_name;
130
151
new_plugin->argv[1] = NULL;
131
132
new_plugin->environ = malloc(sizeof(char *));
152
153
do {
154
new_plugin->environ = malloc(sizeof(char *));
155
} while(new_plugin->environ == NULL and errno == EINTR);
133
156
if(new_plugin->environ == NULL){
157
int e = errno;
134
158
free(copy_name);
135
159
free(new_plugin->argv);
136
160
free(new_plugin);
161
errno = e;
137
162
return NULL;
138
163
}
139
164
new_plugin->environ[0] = NULL;
165
140
166
/* Append the new plugin to the list */
141
*plugin_list = new_plugin;
167
plugin_list = new_plugin;
142
168
return new_plugin;
143
169
}
144
170
146
172
static bool add_to_char_array(const char *new, char ***array,
147
173
int *len){
148
174
/* Resize the pointed-to array to hold one more pointer */
149
*array = realloc(*array, sizeof(char *)
150
* (size_t) ((*len) + 2));
175
do {
176
*array = realloc(*array, sizeof(char *)
177
* (size_t) ((*len) + 2));
178
} while(*array == NULL and errno == EINTR);
151
179
/* Malloc check */
152
180
if(*array == NULL){
153
181
return false;
154
182
}
155
183
/* Make a copy of the new string */
156
char *copy = strdup(new);
184
char *copy;
185
do {
186
copy = strdup(new);
187
} while(copy == NULL and errno == EINTR);
157
188
if(copy == NULL){
158
189
return false;
159
190
}
174
205
}
175
206
176
207
/* Add to a plugin's environment */
177
static bool add_environment(plugin *p, const char *def){
208
static bool add_environment(plugin *p, const char *def, bool replace){
178
209
if(p == NULL){
179
210
return false;
180
211
}
212
/* namelen = length of name of environment variable */
213
size_t namelen = (size_t)(strchrnul(def, '=') - def);
214
/* Search for this environment variable */
215
for(char **e = p->environ; *e != NULL; e++){
216
if(strncmp(*e, def, namelen + 1) == 0){
217
/* It already exists */
218
if(replace){
219
char *new;
220
do {
221
new = realloc(*e, strlen(def) + 1);
222
} while(new == NULL and errno == EINTR);
223
if(new == NULL){
224
return false;
225
}
226
*e = new;
227
strcpy(*e, def);
228
}
229
return true;
230
}
231
}
181
232
return add_to_char_array(def, &(p->environ), &(p->envc));
182
233
}
183
234
184
185
235
/*
186
236
* Based on the example in the GNU LibC manual chapter 13.13 "File
187
237
* Descriptor Flags".
188
* *Note File Descriptor Flags:(libc)Descriptor Flags.
238
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
189
239
*/
190
static int set_cloexec_flag(int fd)
191
{
192
int ret = fcntl(fd, F_GETFD, 0);
240
static int set_cloexec_flag(int fd){
241
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
193
242
/* If reading the flags failed, return error indication now. */
194
243
if(ret < 0){
195
244
return ret;
196
245
}
197
246
/* Store modified flag word in the descriptor. */
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
247
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
248
ret | FD_CLOEXEC));
199
249
}
200
250
201
process *process_list = NULL;
202
251
203
252
/* Mark processes as completed when they exit, and save their exit
204
253
status. */
205
void handle_sigchld(__attribute__((unused)) int sig){
254
static void handle_sigchld(__attribute__((unused)) int sig){
255
int old_errno = errno;
206
256
while(true){
207
process *proc = process_list;
257
plugin *proc = plugin_list;
208
258
int status;
209
259
pid_t pid = waitpid(-1, &status, WNOHANG);
210
260
if(pid == 0){
212
262
break;
213
263
}
214
264
if(pid == -1){
215
if (errno != ECHILD){
216
perror("waitpid");
265
if(errno == ECHILD){
266
/* No child processes */
267
break;
217
268
}
218
/* No child processes */
219
break;
269
perror("waitpid");
220
270
}
221
271
222
272
/* A child exited, find it in process_list */
223
273
while(proc != NULL and proc->pid != pid){
224
274
proc = proc->next;
228
278
continue;
229
279
}
230
280
proc->status = status;
231
proc->completed = true;
281
proc->completed = 1;
232
282
}
283
errno = old_errno;
233
284
}
234
285
235
bool print_out_password(const char *buffer, size_t length){
286
/* Prints out a password to stdout */
287
static bool print_out_password(const char *buffer, size_t length){
236
288
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
240
289
for(size_t written = 0; written < length; written += (size_t)ret){
241
290
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
242
291
length - written));
247
296
return true;
248
297
}
249
298
250
char **add_to_argv(char **argv, int *argc, char *arg){
251
if (argv == NULL){
252
*argc = 1;
253
argv = malloc(sizeof(char*) * 2);
254
if(argv == NULL){
255
return NULL;
299
/* Removes and free a plugin from the plugin list */
300
static void free_plugin(plugin *plugin_node){
301
302
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
303
free(*arg);
304
}
305
free(plugin_node->argv);
306
for(char **env = plugin_node->environ; *env != NULL; env++){
307
free(*env);
308
}
309
free(plugin_node->environ);
310
free(plugin_node->buffer);
311
312
/* Removes the plugin from the singly-linked list */
313
if(plugin_node == plugin_list){
314
/* First one - simple */
315
plugin_list = plugin_list->next;
316
} else {
317
/* Second one or later */
318
for(plugin *p = plugin_list; p != NULL; p = p->next){
319
if(p->next == plugin_node){
320
p->next = plugin_node->next;
321
break;
322
}
256
323
}
257
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
258
argv[1] = NULL;
259
}
260
*argc += 1;
261
argv = realloc(argv, sizeof(char *)
262
* ((unsigned int) *argc + 1));
263
if(argv == NULL){
264
return NULL;
265
}
266
argv[*argc-1] = arg;
267
argv[*argc] = NULL;
268
return argv;
324
}
325
326
free(plugin_node);
269
327
}
270
328
271
static void free_plugin_list(plugin *plugin_list){
272
for(plugin *next; plugin_list != NULL; plugin_list = next){
273
next = plugin_list->next;
274
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
275
free(*arg);
276
}
277
free(plugin_list->argv);
278
for(char **env = plugin_list->environ; *env != NULL; env++){
279
free(*env);
280
}
281
free(plugin_list->environ);
282
free(plugin_list);
329
static void free_plugin_list(void){
330
while(plugin_list != NULL){
331
free_plugin(plugin_list);
283
332
}
284
333
}
285
334
286
335
int main(int argc, char *argv[]){
287
const char *plugindir = "/lib/mandos/plugins.d";
288
const char *argfile = ARGFILE;
336
char *plugindir = NULL;
337
char *argfile = NULL;
289
338
FILE *conffp;
290
339
size_t d_name_len;
291
340
DIR *dir = NULL;
293
342
struct stat st;
294
343
fd_set rfds_all;
295
344
int ret, maxfd = 0;
345
ssize_t sret;
296
346
uid_t uid = 65534;
297
347
gid_t gid = 65534;
298
348
bool debug = false;
308
358
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
309
359
if(ret == -1){
310
360
perror("sigaddset");
311
exitstatus = EXIT_FAILURE;
361
exitstatus = EX_OSERR;
312
362
goto fallback;
313
363
}
314
364
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
315
365
if(ret == -1){
316
366
perror("sigaction");
317
exitstatus = EXIT_FAILURE;
367
exitstatus = EX_OSERR;
318
368
goto fallback;
319
369
}
320
370
323
373
{ .name = "global-options", .key = 'g',
324
374
.arg = "OPTION[,OPTION[,...]]",
325
375
.doc = "Options passed to all plugins" },
326
{ .name = "global-envs", .key = 'e',
376
{ .name = "global-env", .key = 'G',
327
377
.arg = "VAR=value",
328
378
.doc = "Environment variable passed to all plugins" },
329
379
{ .name = "options-for", .key = 'o',
330
380
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
331
381
.doc = "Options passed only to specified plugin" },
332
{ .name = "envs-for", .key = 'f',
382
{ .name = "env-for", .key = 'E',
333
383
.arg = "PLUGIN:ENV=value",
334
384
.doc = "Environment variable passed to specified plugin" },
335
385
{ .name = "disable", .key = 'd',
336
386
.arg = "PLUGIN",
337
387
.doc = "Disable a specific plugin", .group = 1 },
388
{ .name = "enable", .key = 'e',
389
.arg = "PLUGIN",
390
.doc = "Enable a specific plugin", .group = 1 },
338
391
{ .name = "plugin-dir", .key = 128,
339
392
.arg = "DIRECTORY",
340
393
.doc = "Specify a different plugin directory", .group = 2 },
341
{ .name = "userid", .key = 129,
342
.arg = "ID", .flags = 0,
343
.doc = "User ID the plugins will run as", .group = 2 },
344
{ .name = "groupid", .key = 130,
345
.arg = "ID", .flags = 0,
346
.doc = "Group ID the plugins will run as", .group = 2 },
347
{ .name = "debug", .key = 131,
348
.doc = "Debug mode", .group = 3 },
394
{ .name = "config-file", .key = 129,
395
.arg = "FILE",
396
.doc = "Specify a different configuration file", .group = 2 },
397
{ .name = "userid", .key = 130,
398
.arg = "ID", .flags = 0,
399
.doc = "User ID the plugins will run as", .group = 3 },
400
{ .name = "groupid", .key = 131,
401
.arg = "ID", .flags = 0,
402
.doc = "Group ID the plugins will run as", .group = 3 },
403
{ .name = "debug", .key = 132,
404
.doc = "Debug mode", .group = 4 },
405
/*
406
* These reproduce what we would get without ARGP_NO_HELP
407
*/
408
{ .name = "help", .key = '?',
409
.doc = "Give this help list", .group = -1 },
410
{ .name = "usage", .key = -3,
411
.doc = "Give a short usage message", .group = -1 },
412
{ .name = "version", .key = 'V',
413
.doc = "Print program version", .group = -1 },
349
414
{ .name = NULL }
350
415
};
351
416
352
error_t parse_opt (int key, char *arg, struct argp_state *state) {
353
/* Get the INPUT argument from `argp_parse', which we know is a
354
pointer to our plugin list pointer. */
355
plugin **plugins = state->input;
356
switch (key) {
357
case 'g':
358
if (arg != NULL){
359
char *p;
360
while((p = strsep(&arg, ",")) != NULL){
361
if(p[0] == '\0'){
362
continue;
363
}
364
if(not add_argument(getplugin(NULL, plugins), p)){
365
perror("add_argument");
366
return ARGP_ERR_UNKNOWN;
367
}
368
}
369
}
370
break;
371
case 'e':
372
if(arg == NULL){
373
break;
374
}
375
{
376
char *envdef = strdup(arg);
377
if(envdef == NULL){
378
break;
379
}
380
if(not add_environment(getplugin(NULL, plugins), envdef)){
381
perror("add_environment");
382
}
383
}
384
break;
385
case 'o':
386
if (arg != NULL){
387
char *p_name = strsep(&arg, ":");
388
if(p_name[0] == '\0'){
389
break;
390
}
391
char *opt = strsep(&arg, ":");
392
if(opt[0] == '\0'){
393
break;
394
}
395
if(opt != NULL){
396
char *p;
397
while((p = strsep(&opt, ",")) != NULL){
398
if(p[0] == '\0'){
399
continue;
400
}
401
if(not add_argument(getplugin(p_name, plugins), p)){
402
perror("add_argument");
403
return ARGP_ERR_UNKNOWN;
404
}
405
}
406
}
407
}
408
break;
409
case 'f':
410
if(arg == NULL){
411
break;
412
}
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
418
errno = 0;
419
switch(key){
420
char *tmp;
421
intmax_t tmpmax;
422
case 'g': /* --global-options */
423
{
424
char *plugin_option;
425
while((plugin_option = strsep(&arg, ",")) != NULL){
426
if(not add_argument(getplugin(NULL), plugin_option)){
427
break;
428
}
429
}
430
}
431
break;
432
case 'G': /* --global-env */
433
add_environment(getplugin(NULL), arg, true);
434
break;
435
case 'o': /* --options-for */
436
{
437
char *option_list = strchr(arg, ':');
438
if(option_list == NULL){
439
argp_error(state, "No colon in \"%s\"", arg);
440
errno = EINVAL;
441
break;
442
}
443
*option_list = '\0';
444
option_list++;
445
if(arg[0] == '\0'){
446
argp_error(state, "Empty plugin name");
447
errno = EINVAL;
448
break;
449
}
450
char *option;
451
while((option = strsep(&option_list, ",")) != NULL){
452
if(not add_argument(getplugin(arg), option)){
453
break;
454
}
455
}
456
}
457
break;
458
case 'E': /* --env-for */
413
459
{
414
460
char *envdef = strchr(arg, ':');
415
461
if(envdef == NULL){
416
break;
417
}
418
char *p_name = strndup(arg, (size_t) (envdef-arg));
419
if(p_name == NULL){
420
break;
421
}
462
argp_error(state, "No colon in \"%s\"", arg);
463
errno = EINVAL;
464
break;
465
}
466
*envdef = '\0';
422
467
envdef++;
423
if(not add_environment(getplugin(p_name, plugins), envdef)){
424
perror("add_environment");
425
}
426
}
427
break;
428
case 'd':
429
if (arg != NULL){
430
plugin *p = getplugin(arg, plugins);
431
if(p == NULL){
432
return ARGP_ERR_UNKNOWN;
433
}
434
p->disabled = true;
435
}
436
break;
437
case 128:
438
plugindir = arg;
439
break;
440
case 129:
441
uid = (uid_t)strtol(arg, NULL, 10);
442
break;
443
case 130:
444
gid = (gid_t)strtol(arg, NULL, 10);
445
break;
446
case 131:
468
if(arg[0] == '\0'){
469
argp_error(state, "Empty plugin name");
470
errno = EINVAL;
471
break;
472
}
473
add_environment(getplugin(arg), envdef, true);
474
}
475
break;
476
case 'd': /* --disable */
477
{
478
plugin *p = getplugin(arg);
479
if(p != NULL){
480
p->disabled = true;
481
}
482
}
483
break;
484
case 'e': /* --enable */
485
{
486
plugin *p = getplugin(arg);
487
if(p != NULL){
488
p->disabled = false;
489
}
490
}
491
break;
492
case 128: /* --plugin-dir */
493
free(plugindir);
494
plugindir = strdup(arg);
495
break;
496
case 129: /* --config-file */
497
/* This is already done by parse_opt_config_file() */
498
break;
499
case 130: /* --userid */
500
tmpmax = strtoimax(arg, &tmp, 10);
501
if(errno != 0 or tmp == arg or *tmp != '\0'
502
or tmpmax != (uid_t)tmpmax){
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
505
break;
506
}
507
uid = (uid_t)tmpmax;
508
break;
509
case 131: /* --groupid */
510
tmpmax = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmpmax != (gid_t)tmpmax){
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
515
break;
516
}
517
gid = (gid_t)tmpmax;
518
break;
519
case 132: /* --debug */
447
520
debug = true;
448
521
break;
449
case ARGP_KEY_ARG:
450
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
451
break;
452
case ARGP_KEY_END:
453
break;
454
default:
455
return ARGP_ERR_UNKNOWN;
456
}
457
return 0;
458
}
459
460
plugin *plugin_list = NULL;
461
462
struct argp argp = { .options = options, .parser = parse_opt,
463
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
522
/*
523
* These reproduce what we would get without ARGP_NO_HELP
524
*/
525
case '?': /* --help */
526
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
527
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
528
case -3: /* --usage */
529
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
530
argp_state_help(state, state->out_stream,
531
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
532
case 'V': /* --version */
533
fprintf(state->out_stream, "%s\n", argp_program_version);
534
exit(EXIT_SUCCESS);
535
break;
536
/*
537
* When adding more options before this line, remember to also add a
538
* "case" to the "parse_opt_config_file" function below.
539
*/
540
case ARGP_KEY_ARG:
541
/* Cryptsetup always passes an argument, which is an empty
542
string if "none" was specified in /etc/crypttab. So if
543
argument was empty, we ignore it silently. */
544
if(arg[0] == '\0'){
545
break;
546
}
547
default:
548
return ARGP_ERR_UNKNOWN;
549
}
550
return errno; /* Set to 0 at start */
551
}
552
553
/* This option parser is the same as parse_opt() above, except it
554
ignores everything but the --config-file option. */
555
error_t parse_opt_config_file(int key, char *arg,
556
__attribute__((unused))
557
struct argp_state *state){
558
errno = 0;
559
switch(key){
560
case 'g': /* --global-options */
561
case 'G': /* --global-env */
562
case 'o': /* --options-for */
563
case 'E': /* --env-for */
564
case 'd': /* --disable */
565
case 'e': /* --enable */
566
case 128: /* --plugin-dir */
567
break;
568
case 129: /* --config-file */
569
free(argfile);
570
argfile = strdup(arg);
571
break;
572
case 130: /* --userid */
573
case 131: /* --groupid */
574
case 132: /* --debug */
575
case '?': /* --help */
576
case -3: /* --usage */
577
case 'V': /* --version */
578
case ARGP_KEY_ARG:
579
break;
580
default:
581
return ARGP_ERR_UNKNOWN;
582
}
583
return errno;
584
}
585
586
struct argp argp = { .options = options,
587
.parser = parse_opt_config_file,
588
.args_doc = "",
464
589
.doc = "Mandos plugin runner -- Run plugins" };
465
590
466
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
467
if (ret == ARGP_ERR_UNKNOWN){
468
fprintf(stderr, "Unknown error while parsing arguments\n");
469
exitstatus = EXIT_FAILURE;
470
goto fallback;
471
}
472
473
conffp = fopen(argfile, "r");
591
/* Parse using parse_opt_config_file() in order to get the custom
592
config file location, if any. */
593
ret = argp_parse(&argp, argc, argv,
594
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
595
NULL, NULL);
596
switch(ret){
597
case 0:
598
break;
599
case ENOMEM:
600
default:
601
errno = ret;
602
perror("argp_parse");
603
exitstatus = EX_OSERR;
604
goto fallback;
605
case EINVAL:
606
exitstatus = EX_USAGE;
607
goto fallback;
608
}
609
610
/* Reset to the normal argument parser */
611
argp.parser = parse_opt;
612
613
/* Open the configfile if available */
614
if(argfile == NULL){
615
conffp = fopen(AFILE, "r");
616
} else {
617
conffp = fopen(argfile, "r");
618
}
474
619
if(conffp != NULL){
475
620
char *org_line = NULL;
476
621
char *p, *arg, *new_arg, *line;
477
622
size_t size = 0;
478
ssize_t sret;
479
623
const char whitespace_delims[] = " \r\t\f\v\n";
480
624
const char comment_delim[] = "#";
481
625
626
custom_argc = 1;
627
custom_argv = malloc(sizeof(char*) * 2);
628
if(custom_argv == NULL){
629
perror("malloc");
630
exitstatus = EX_OSERR;
631
goto fallback;
632
}
633
custom_argv[0] = argv[0];
634
custom_argv[1] = NULL;
635
636
/* for each line in the config file, strip whitespace and ignore
637
commented text */
482
638
while(true){
483
639
sret = getline(&org_line, &size, conffp);
484
640
if(sret == -1){
485
641
break;
486
642
}
487
643
488
644
line = org_line;
489
645
arg = strsep(&line, comment_delim);
490
646
while((p = strsep(&arg, whitespace_delims)) != NULL){
492
648
continue;
493
649
}
494
650
new_arg = strdup(p);
495
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
496
if (custom_argv == NULL){
497
perror("add_to_argv");
498
exitstatus = EXIT_FAILURE;
499
goto fallback;
500
}
651
if(new_arg == NULL){
652
perror("strdup");
653
exitstatus = EX_OSERR;
654
free(org_line);
655
goto fallback;
656
}
657
658
custom_argc += 1;
659
custom_argv = realloc(custom_argv, sizeof(char *)
660
* ((unsigned int) custom_argc + 1));
661
if(custom_argv == NULL){
662
perror("realloc");
663
exitstatus = EX_OSERR;
664
free(org_line);
665
goto fallback;
666
}
667
custom_argv[custom_argc-1] = new_arg;
668
custom_argv[custom_argc] = NULL;
501
669
}
502
670
}
671
do {
672
ret = fclose(conffp);
673
} while(ret == EOF and errno == EINTR);
674
if(ret == EOF){
675
perror("fclose");
676
exitstatus = EX_IOERR;
677
goto fallback;
678
}
503
679
free(org_line);
504
} else{
680
} else {
505
681
/* Check for harmful errors and go to fallback. Other errors might
506
682
not affect opening plugins */
507
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
683
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
508
684
perror("fopen");
509
exitstatus = EXIT_FAILURE;
685
exitstatus = EX_OSERR;
510
686
goto fallback;
511
687
}
512
688
}
513
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
514
691
if(custom_argv != NULL){
515
custom_argv[0] = argv[0];
516
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
517
if (ret == ARGP_ERR_UNKNOWN){
518
fprintf(stderr, "Unknown error while parsing arguments\n");
519
exitstatus = EXIT_FAILURE;
692
ret = argp_parse(&argp, custom_argc, custom_argv,
693
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
694
NULL, NULL);
695
switch(ret){
696
case 0:
697
break;
698
case ENOMEM:
699
default:
700
errno = ret;
701
perror("argp_parse");
702
exitstatus = EX_OSERR;
703
goto fallback;
704
case EINVAL:
705
exitstatus = EX_CONFIG;
520
706
goto fallback;
521
707
}
522
708
}
523
709
710
/* Parse actual command line arguments, to let them override the
711
config file */
712
ret = argp_parse(&argp, argc, argv,
713
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
714
NULL, NULL);
715
switch(ret){
716
case 0:
717
break;
718
case ENOMEM:
719
default:
720
errno = ret;
721
perror("argp_parse");
722
exitstatus = EX_OSERR;
723
goto fallback;
724
case EINVAL:
725
exitstatus = EX_USAGE;
726
goto fallback;
727
}
728
524
729
if(debug){
525
730
for(plugin *p = plugin_list; p != NULL; p=p->next){
526
731
fprintf(stderr, "Plugin: %s has %d arguments\n",
528
733
for(char **a = p->argv; *a != NULL; a++){
529
734
fprintf(stderr, "\tArg: %s\n", *a);
530
735
}
531
fprintf(stderr, "...and %u environment variables\n", p->envc);
736
fprintf(stderr, "...and %d environment variables\n", p->envc);
532
737
for(char **a = p->environ; *a != NULL; a++){
533
738
fprintf(stderr, "\t%s\n", *a);
534
739
}
535
740
}
536
741
}
537
742
743
/* Strip permissions down to nobody */
744
setgid(gid);
745
if(ret == -1){
746
perror("setgid");
747
}
538
748
ret = setuid(uid);
539
if (ret == -1){
749
if(ret == -1){
540
750
perror("setuid");
541
751
}
542
752
543
setgid(gid);
544
if (ret == -1){
545
perror("setgid");
546
}
547
548
dir = opendir(plugindir);
549
if(dir == NULL){
550
perror("Could not open plugin dir");
551
exitstatus = EXIT_FAILURE;
552
goto fallback;
553
}
554
555
/* Set the FD_CLOEXEC flag on the directory, if possible */
753
/* Open plugin directory with close_on_exec flag */
556
754
{
557
int dir_fd = dirfd(dir);
558
if(dir_fd >= 0){
559
ret = set_cloexec_flag(dir_fd);
560
if(ret < 0){
561
perror("set_cloexec_flag");
562
exitstatus = EXIT_FAILURE;
563
goto fallback;
564
}
755
int dir_fd = -1;
756
if(plugindir == NULL){
757
dir_fd = open(PDIR, O_RDONLY |
758
#ifdef O_CLOEXEC
759
O_CLOEXEC
760
#else /* not O_CLOEXEC */
761
0
762
#endif /* not O_CLOEXEC */
763
);
764
} else {
765
dir_fd = open(plugindir, O_RDONLY |
766
#ifdef O_CLOEXEC
767
O_CLOEXEC
768
#else /* not O_CLOEXEC */
769
0
770
#endif /* not O_CLOEXEC */
771
);
772
}
773
if(dir_fd == -1){
774
perror("Could not open plugin dir");
775
exitstatus = EX_UNAVAILABLE;
776
goto fallback;
777
}
778
779
#ifndef O_CLOEXEC
780
/* Set the FD_CLOEXEC flag on the directory */
781
ret = set_cloexec_flag(dir_fd);
782
if(ret < 0){
783
perror("set_cloexec_flag");
784
TEMP_FAILURE_RETRY(close(dir_fd));
785
exitstatus = EX_OSERR;
786
goto fallback;
787
}
788
#endif /* O_CLOEXEC */
789
790
dir = fdopendir(dir_fd);
791
if(dir == NULL){
792
perror("Could not open plugin dir");
793
TEMP_FAILURE_RETRY(close(dir_fd));
794
exitstatus = EX_OSERR;
795
goto fallback;
565
796
}
566
797
}
567
798
568
799
FD_ZERO(&rfds_all);
569
800
801
/* Read and execute any executable in the plugin directory*/
570
802
while(true){
571
dirst = readdir(dir);
803
do {
804
dirst = readdir(dir);
805
} while(dirst == NULL and errno == EINTR);
572
806
573
// All directory entries have been processed
807
/* All directory entries have been processed */
574
808
if(dirst == NULL){
575
if (errno == EBADF){
809
if(errno == EBADF){
576
810
perror("readdir");
577
exitstatus = EXIT_FAILURE;
811
exitstatus = EX_IOERR;
578
812
goto fallback;
579
813
}
580
814
break;
582
816
583
817
d_name_len = strlen(dirst->d_name);
584
818
585
// Ignore dotfiles, backup files and other junk
819
/* Ignore dotfiles, backup files and other junk */
586
820
{
587
821
bool bad_name = false;
588
822
590
824
591
825
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
592
826
".dpkg-old",
827
".dpkg-bak",
593
828
".dpkg-divert", NULL };
594
829
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
595
830
size_t pre_len = strlen(*pre);
603
838
break;
604
839
}
605
840
}
606
607
841
if(bad_name){
608
842
continue;
609
843
}
610
611
844
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
612
845
size_t suf_len = strlen(*suf);
613
846
if((d_name_len >= suf_len)
614
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
847
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
615
848
== 0)){
616
849
if(debug){
617
850
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
626
859
continue;
627
860
}
628
861
}
629
862
630
863
char *filename;
631
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
864
if(plugindir == NULL){
865
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
866
dirst->d_name));
867
} else {
868
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
869
plugindir,
870
dirst->d_name));
871
}
632
872
if(ret < 0){
633
873
perror("asprintf");
634
874
continue;
635
875
}
636
876
637
ret = stat(filename, &st);
638
if (ret == -1){
877
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
878
if(ret == -1){
639
879
perror("stat");
640
880
free(filename);
641
881
continue;
642
882
}
643
883
644
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
884
/* Ignore non-executable files */
885
if(not S_ISREG(st.st_mode)
886
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
645
887
if(debug){
646
888
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
647
889
" with bad type or mode\n", filename);
649
891
free(filename);
650
892
continue;
651
893
}
652
plugin *p = getplugin(dirst->d_name, &plugin_list);
894
895
plugin *p = getplugin(dirst->d_name);
653
896
if(p == NULL){
654
897
perror("getplugin");
655
898
free(filename);
665
908
}
666
909
{
667
910
/* Add global arguments to argument list for this plugin */
668
plugin *g = getplugin(NULL, &plugin_list);
911
plugin *g = getplugin(NULL);
669
912
if(g != NULL){
670
913
for(char **a = g->argv + 1; *a != NULL; a++){
671
914
if(not add_argument(p, *a)){
674
917
}
675
918
/* Add global environment variables */
676
919
for(char **e = g->environ; *e != NULL; e++){
677
if(not add_environment(p, *e)){
920
if(not add_environment(p, *e, false)){
678
921
perror("add_environment");
679
922
}
680
923
}
685
928
process, too. */
686
929
if(p->environ[0] != NULL){
687
930
for(char **e = environ; *e != NULL; e++){
688
char *copy = strdup(*e);
689
if(copy == NULL){
690
perror("strdup");
691
continue;
692
}
693
if(not add_environment(p, copy)){
931
if(not add_environment(p, *e, false)){
694
932
perror("add_environment");
695
933
}
696
934
}
697
935
}
698
936
699
937
int pipefd[2];
700
ret = pipe(pipefd);
701
if (ret == -1){
938
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
939
if(ret == -1){
702
940
perror("pipe");
703
exitstatus = EXIT_FAILURE;
941
exitstatus = EX_OSERR;
704
942
goto fallback;
705
943
}
944
/* Ask OS to automatic close the pipe on exec */
706
945
ret = set_cloexec_flag(pipefd[0]);
707
946
if(ret < 0){
708
947
perror("set_cloexec_flag");
709
exitstatus = EXIT_FAILURE;
948
exitstatus = EX_OSERR;
710
949
goto fallback;
711
950
}
712
951
ret = set_cloexec_flag(pipefd[1]);
713
952
if(ret < 0){
714
953
perror("set_cloexec_flag");
715
exitstatus = EXIT_FAILURE;
954
exitstatus = EX_OSERR;
716
955
goto fallback;
717
956
}
718
957
/* Block SIGCHLD until process is safely in process list */
719
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
958
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
959
&sigchld_action.sa_mask,
960
NULL));
720
961
if(ret < 0){
721
962
perror("sigprocmask");
722
exitstatus = EXIT_FAILURE;
963
exitstatus = EX_OSERR;
723
964
goto fallback;
724
965
}
725
// Starting a new process to be watched
726
pid_t pid = fork();
966
/* Starting a new process to be watched */
967
pid_t pid;
968
do {
969
pid = fork();
970
} while(pid == -1 and errno == EINTR);
727
971
if(pid == -1){
728
972
perror("fork");
729
exitstatus = EXIT_FAILURE;
973
exitstatus = EX_OSERR;
730
974
goto fallback;
731
975
}
732
976
if(pid == 0){
734
978
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
735
979
if(ret < 0){
736
980
perror("sigaction");
737
_exit(EXIT_FAILURE);
981
_exit(EX_OSERR);
738
982
}
739
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
983
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
740
984
if(ret < 0){
741
985
perror("sigprocmask");
742
_exit(EXIT_FAILURE);
986
_exit(EX_OSERR);
743
987
}
744
988
745
989
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
746
990
if(ret == -1){
747
991
perror("dup2");
748
_exit(EXIT_FAILURE);
992
_exit(EX_OSERR);
749
993
}
750
994
751
995
if(dirfd(dir) < 0){
756
1000
if(p->environ[0] == NULL){
757
1001
if(execv(filename, p->argv) < 0){
758
1002
perror("execv");
759
_exit(EXIT_FAILURE);
1003
_exit(EX_OSERR);
760
1004
}
761
1005
} else {
762
1006
if(execve(filename, p->argv, p->environ) < 0){
763
1007
perror("execve");
764
_exit(EXIT_FAILURE);
1008
_exit(EX_OSERR);
765
1009
}
766
1010
}
767
1011
/* no return */
768
1012
}
769
/* parent process */
1013
/* Parent process */
1014
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1015
pipe */
770
1016
free(filename);
771
close(pipefd[1]); /* close unused write end of pipe */
772
process *new_process = malloc(sizeof(process));
773
if (new_process == NULL){
774
perror("malloc");
775
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1017
plugin *new_plugin = getplugin(dirst->d_name);
1018
if(new_plugin == NULL){
1019
perror("getplugin");
1020
ret = (int)(TEMP_FAILURE_RETRY
1021
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1022
NULL)));
776
1023
if(ret < 0){
777
perror("sigprocmask");
1024
perror("sigprocmask");
778
1025
}
779
exitstatus = EXIT_FAILURE;
1026
exitstatus = EX_OSERR;
780
1027
goto fallback;
781
1028
}
782
1029
783
*new_process = (struct process){ .pid = pid,
784
.fd = pipefd[0],
785
.next = process_list };
786
// List handling
787
process_list = new_process;
1030
new_plugin->pid = pid;
1031
new_plugin->fd = pipefd[0];
1032
788
1033
/* Unblock SIGCHLD so signal handler can be run if this process
789
1034
has already completed */
790
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1035
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1036
&sigchld_action.sa_mask,
1037
NULL));
791
1038
if(ret < 0){
792
1039
perror("sigprocmask");
793
exitstatus = EXIT_FAILURE;
1040
exitstatus = EX_OSERR;
794
1041
goto fallback;
795
1042
}
796
1043
797
FD_SET(new_process->fd, &rfds_all);
1044
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1045
-Wconversion */
798
1046
799
if (maxfd < new_process->fd){
800
maxfd = new_process->fd;
1047
if(maxfd < new_plugin->fd){
1048
maxfd = new_plugin->fd;
801
1049
}
802
803
1050
}
804
1051
805
free_plugin_list(plugin_list);
806
plugin_list = NULL;
807
808
closedir(dir);
1052
TEMP_FAILURE_RETRY(closedir(dir));
809
1053
dir = NULL;
810
811
if (process_list == NULL){
812
fprintf(stderr, "No plugin processes started. Incorrect plugin"
813
" directory?\n");
814
process_list = NULL;
1054
free_plugin(getplugin(NULL));
1055
1056
for(plugin *p = plugin_list; p != NULL; p = p->next){
1057
if(p->pid != 0){
1058
break;
1059
}
1060
if(p->next == NULL){
1061
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1062
" directory?\n");
1063
free_plugin_list();
1064
}
815
1065
}
816
while(process_list){
1066
1067
/* Main loop while running plugins exist */
1068
while(plugin_list){
817
1069
fd_set rfds = rfds_all;
818
1070
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
819
if (select_ret == -1){
1071
if(select_ret == -1 and errno != EINTR){
820
1072
perror("select");
821
exitstatus = EXIT_FAILURE;
1073
exitstatus = EX_OSERR;
822
1074
goto fallback;
823
1075
}
824
1076
/* OK, now either a process completed, or something can be read
825
1077
from one of them */
826
for(process *proc = process_list; proc ; proc = proc->next){
1078
for(plugin *proc = plugin_list; proc != NULL;){
827
1079
/* Is this process completely done? */
828
if(proc->eof and proc->completed){
1080
if(proc->completed and proc->eof){
829
1081
/* Only accept the plugin output if it exited cleanly */
830
1082
if(not WIFEXITED(proc->status)
831
1083
or WEXITSTATUS(proc->status) != 0){
832
1084
/* Bad exit by plugin */
1085
833
1086
if(debug){
834
1087
if(WIFEXITED(proc->status)){
835
fprintf(stderr, "Plugin %u exited with status %d\n",
836
(unsigned int) (proc->pid),
1088
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1089
" status %d\n", proc->name,
1090
(intmax_t) (proc->pid),
837
1091
WEXITSTATUS(proc->status));
838
} else if(WIFSIGNALED(proc->status)) {
839
fprintf(stderr, "Plugin %u killed by signal %d\n",
840
(unsigned int) (proc->pid),
841
WTERMSIG(proc->status));
1092
} else if(WIFSIGNALED(proc->status)){
1093
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1094
" signal %d: %s\n", proc->name,
1095
(intmax_t) (proc->pid),
1096
WTERMSIG(proc->status),
1097
strsignal(WTERMSIG(proc->status)));
842
1098
} else if(WCOREDUMP(proc->status)){
843
fprintf(stderr, "Plugin %d dumped core\n",
844
(unsigned int) (proc->pid));
1099
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1100
" core\n", proc->name, (intmax_t) (proc->pid));
845
1101
}
846
1102
}
1103
847
1104
/* Remove the plugin */
848
FD_CLR(proc->fd, &rfds_all);
1105
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1106
-Wconversion */
1107
849
1108
/* Block signal while modifying process_list */
850
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1110
(SIG_BLOCK,
1111
&sigchld_action.sa_mask,
1112
NULL));
851
1113
if(ret < 0){
852
1114
perror("sigprocmask");
853
exitstatus = EXIT_FAILURE;
1115
exitstatus = EX_OSERR;
854
1116
goto fallback;
855
1117
}
856
/* Delete this process entry from the list */
857
if(process_list == proc){
858
/* First one - simple */
859
process_list = proc->next;
860
} else {
861
/* Second one or later */
862
for(process *p = process_list; p != NULL; p = p->next){
863
if(p->next == proc){
864
p->next = proc->next;
865
break;
866
}
867
}
868
}
1118
1119
plugin *next_plugin = proc->next;
1120
free_plugin(proc);
1121
proc = next_plugin;
1122
869
1123
/* We are done modifying process list, so unblock signal */
870
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
871
NULL);
1124
ret = (int)(TEMP_FAILURE_RETRY
1125
(sigprocmask(SIG_UNBLOCK,
1126
&sigchld_action.sa_mask, NULL)));
872
1127
if(ret < 0){
873
1128
perror("sigprocmask");
874
}
875
free(proc->buffer);
876
free(proc);
877
/* We deleted this process from the list, so we can't go
878
proc->next. Therefore, start over from the beginning of
879
the process list */
880
break;
1129
exitstatus = EX_OSERR;
1130
goto fallback;
1131
}
1132
1133
if(plugin_list == NULL){
1134
break;
1135
}
1136
1137
continue;
881
1138
}
1139
882
1140
/* This process exited nicely, so print its buffer */
883
1141
884
1142
bool bret = print_out_password(proc->buffer,
885
1143
proc->buffer_length);
886
1144
if(not bret){
887
1145
perror("print_out_password");
888
exitstatus = EXIT_FAILURE;
1146
exitstatus = EX_IOERR;
889
1147
}
890
1148
goto fallback;
891
1149
}
1150
892
1151
/* This process has not completed. Does it have any output? */
893
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1152
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1153
warning from
1154
-Wconversion */
894
1155
/* This process had nothing to say at this time */
1156
proc = proc->next;
895
1157
continue;
896
1158
}
897
1159
/* Before reading, make the process' data buffer large enough */
898
1160
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
899
1161
proc->buffer = realloc(proc->buffer, proc->buffer_size
900
1162
+ (size_t) BUFFER_SIZE);
901
if (proc->buffer == NULL){
1163
if(proc->buffer == NULL){
902
1164
perror("malloc");
903
exitstatus = EXIT_FAILURE;
1165
exitstatus = EX_OSERR;
904
1166
goto fallback;
905
1167
}
906
1168
proc->buffer_size += BUFFER_SIZE;
907
1169
}
908
1170
/* Read from the process */
909
ret = read(proc->fd, proc->buffer + proc->buffer_length,
910
BUFFER_SIZE);
911
if(ret < 0){
1171
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1172
proc->buffer
1173
+ proc->buffer_length,
1174
BUFFER_SIZE));
1175
if(sret < 0){
912
1176
/* Read error from this process; ignore the error */
1177
proc = proc->next;
913
1178
continue;
914
1179
}
915
if(ret == 0){
1180
if(sret == 0){
916
1181
/* got EOF */
917
1182
proc->eof = true;
918
1183
} else {
919
proc->buffer_length += (size_t) ret;
1184
proc->buffer_length += (size_t) sret;
920
1185
}
921
1186
}
922
1187
}
923
924
1188
1189
925
1190
fallback:
926
1191
927
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1192
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1193
and exitstatus != EX_OK)){
928
1194
/* Fallback if all plugins failed, none are found or an error
929
1195
occured */
930
1196
bool bret;
931
1197
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
932
1198
char *passwordbuffer = getpass("Password: ");
933
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1199
size_t len = strlen(passwordbuffer);
1200
/* Strip trailing newline */
1201
if(len > 0 and passwordbuffer[len-1] == '\n'){
1202
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1203
len--;
1204
}
1205
bret = print_out_password(passwordbuffer, len);
934
1206
if(not bret){
935
1207
perror("print_out_password");
936
exitstatus = EXIT_FAILURE;
1208
exitstatus = EX_IOERR;
937
1209
}
938
1210
}
939
1211
941
1213
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
942
1214
if(ret == -1){
943
1215
perror("sigaction");
944
exitstatus = EXIT_FAILURE;
1216
exitstatus = EX_OSERR;
945
1217
}
946
1218
947
1219
if(custom_argv != NULL){
948
for(char **arg = custom_argv; *arg != NULL; arg++){
1220
for(char **arg = custom_argv+1; *arg != NULL; arg++){
949
1221
free(*arg);
950
1222
}
951
1223
free(custom_argv);
952
1224
}
953
free_plugin_list(plugin_list);
954
1225
955
1226
if(dir != NULL){
956
1227
closedir(dir);
957
1228
}
958
1229
959
/* Free the process list and kill the processes */
960
for(process *next; process_list != NULL; process_list = next){
961
next = process_list->next;
962
close(process_list->fd);
963
ret = kill(process_list->pid, SIGTERM);
964
if(ret == -1 and errno != ESRCH){
965
/* set-uid proccesses migth not get closed */
966
perror("kill");
1230
/* Kill the processes */
1231
for(plugin *p = plugin_list; p != NULL; p = p->next){
1232
if(p->pid != 0){
1233
close(p->fd);
1234
ret = kill(p->pid, SIGTERM);
1235
if(ret == -1 and errno != ESRCH){
1236
/* Set-uid proccesses might not get closed */
1237
perror("kill");
1238
}
967
1239
}
968
free(process_list->buffer);
969
free(process_list);
970
1240
}
971
1241
972
1242
/* Wait for any remaining child processes to terminate */
973
do{
1243
do {
974
1244
ret = wait(NULL);
975
1245
} while(ret >= 0);
976
1246
if(errno != ECHILD){
977
1247
perror("wait");
978
1248
}
979
1249
1250
free_plugin_list();
1251
1252
free(plugindir);
1253
free(argfile);
1254
980
1255
return exitstatus;
981
1256
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0