To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugin-runner.c
- browse files at revision 24.1.186
- compare with another revision
- download diff
- download tarball
- view history from revision 24.1.186
- Committer: Björn Påhlsson
- Date: 2011-10-02 19:18:24 UTC
- mto: This revision was merged to the branch mainline in revision 505.
- Revision ID: belorn@fukt.bsnet.se-20111002191824-eweh4pvneeg3qzia
transitional stuff actually working
documented change to D-Bus API
documented change to D-Bus API
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- 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:
- .bzrignore
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
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> /* 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 */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
75
67
76
#define BUFFER_SIZE 256
68
77
69
78
#define PDIR "/lib/mandos/plugins.d"
70
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
71
80
72
const char *argp_program_version = "plugin-runner 1.0";
81
const char *argp_program_version = "plugin-runner " VERSION;
73
82
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
83
75
struct plugin;
76
77
84
typedef struct plugin{
78
85
char *name; /* can be NULL or any plugin name */
79
86
char **argv;
81
88
char **environ;
82
89
int envc;
83
90
bool disabled;
84
91
85
92
/* Variables used for running processes*/
86
93
pid_t pid;
87
94
int fd;
89
96
size_t buffer_size;
90
97
size_t buffer_length;
91
98
bool eof;
92
volatile bool completed;
93
volatile int status;
99
volatile sig_atomic_t completed;
100
int status;
94
101
struct plugin *next;
95
102
} plugin;
96
103
97
104
static plugin *plugin_list = NULL;
98
105
99
/* Gets a existing plugin based on name,
106
/* Gets an existing plugin based on name,
100
107
or if none is found, creates a new one */
101
108
static plugin *getplugin(char *name){
102
/* Check for exiting plugin with that name */
103
for (plugin *p = plugin_list; p != NULL; p = p->next){
104
if ((p->name == name)
105
or (p->name and name and (strcmp(p->name, name) == 0))){
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))){
106
113
return p;
107
114
}
108
115
}
109
116
/* Create a new plugin */
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
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){
112
122
return NULL;
113
123
}
114
124
char *copy_name = NULL;
115
125
if(name != NULL){
116
copy_name = strdup(name);
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
117
129
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
118
133
return NULL;
119
134
}
120
135
}
121
122
*new_plugin = (plugin) { .name = copy_name,
123
.argc = 1,
124
.disabled = false,
125
.next = plugin_list };
126
127
new_plugin->argv = malloc(sizeof(char *) * 2);
128
if (new_plugin->argv == NULL){
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;
129
147
free(copy_name);
130
148
free(new_plugin);
149
errno = e;
131
150
return NULL;
132
151
}
133
152
new_plugin->argv[0] = copy_name;
134
153
new_plugin->argv[1] = NULL;
135
136
new_plugin->environ = malloc(sizeof(char *));
154
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
137
158
if(new_plugin->environ == NULL){
159
int e = errno;
138
160
free(copy_name);
139
161
free(new_plugin->argv);
140
162
free(new_plugin);
163
errno = e;
141
164
return NULL;
142
165
}
143
166
new_plugin->environ[0] = NULL;
144
167
145
168
/* Append the new plugin to the list */
146
169
plugin_list = new_plugin;
147
170
return new_plugin;
151
174
static bool add_to_char_array(const char *new, char ***array,
152
175
int *len){
153
176
/* Resize the pointed-to array to hold one more pointer */
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
177
do {
178
*array = realloc(*array, sizeof(char *)
179
* (size_t) ((*len) + 2));
180
} while(*array == NULL and errno == EINTR);
156
181
/* Malloc check */
157
182
if(*array == NULL){
158
183
return false;
159
184
}
160
185
/* Make a copy of the new string */
161
char *copy = strdup(new);
186
char *copy;
187
do {
188
copy = strdup(new);
189
} while(copy == NULL and errno == EINTR);
162
190
if(copy == NULL){
163
191
return false;
164
192
}
179
207
}
180
208
181
209
/* Add to a plugin's environment */
182
static bool add_environment(plugin *p, const char *def){
210
static bool add_environment(plugin *p, const char *def, bool replace){
183
211
if(p == NULL){
184
212
return false;
185
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
}
186
234
return add_to_char_array(def, &(p->environ), &(p->envc));
187
235
}
188
236
189
237
/*
190
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
191
239
* Descriptor Flags".
192
* *Note File Descriptor Flags:(libc)Descriptor Flags.
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
193
241
*/
194
static int set_cloexec_flag(int fd)
195
{
196
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));
197
244
/* If reading the flags failed, return error indication now. */
198
245
if(ret < 0){
199
246
return ret;
200
247
}
201
248
/* Store modified flag word in the descriptor. */
202
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
250
ret | FD_CLOEXEC));
203
251
}
204
252
205
253
206
254
/* Mark processes as completed when they exit, and save their exit
207
255
status. */
208
void handle_sigchld(__attribute__((unused)) int sig){
256
static void handle_sigchld(__attribute__((unused)) int sig){
257
int old_errno = errno;
209
258
while(true){
210
259
plugin *proc = plugin_list;
211
260
int status;
215
264
break;
216
265
}
217
266
if(pid == -1){
218
if (errno != ECHILD){
219
perror("waitpid");
267
if(errno == ECHILD){
268
/* No child processes */
269
break;
220
270
}
221
/* No child processes */
222
break;
271
error(0, errno, "waitpid");
223
272
}
224
273
225
274
/* A child exited, find it in process_list */
226
275
while(proc != NULL and proc->pid != pid){
227
276
proc = proc->next;
231
280
continue;
232
281
}
233
282
proc->status = status;
234
proc->completed = true;
283
proc->completed = 1;
235
284
}
285
errno = old_errno;
236
286
}
237
287
238
288
/* Prints out a password to stdout */
239
bool print_out_password(const char *buffer, size_t length){
289
static bool print_out_password(const char *buffer, size_t length){
240
290
ssize_t ret;
241
if(length>0 and buffer[length-1] == '\n'){
242
length--;
243
}
244
291
for(size_t written = 0; written < length; written += (size_t)ret){
245
292
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
246
293
length - written));
263
310
}
264
311
free(plugin_node->environ);
265
312
free(plugin_node->buffer);
266
313
267
314
/* Removes the plugin from the singly-linked list */
268
315
if(plugin_node == plugin_list){
269
316
/* First one - simple */
297
344
struct stat st;
298
345
fd_set rfds_all;
299
346
int ret, maxfd = 0;
347
ssize_t sret;
300
348
uid_t uid = 65534;
301
349
gid_t gid = 65534;
302
350
bool debug = false;
311
359
sigemptyset(&sigchld_action.sa_mask);
312
360
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
313
361
if(ret == -1){
314
perror("sigaddset");
315
exitstatus = EXIT_FAILURE;
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
316
364
goto fallback;
317
365
}
318
366
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
319
367
if(ret == -1){
320
perror("sigaction");
321
exitstatus = EXIT_FAILURE;
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
322
370
goto fallback;
323
371
}
324
372
327
375
{ .name = "global-options", .key = 'g',
328
376
.arg = "OPTION[,OPTION[,...]]",
329
377
.doc = "Options passed to all plugins" },
330
{ .name = "global-envs", .key = 'e',
378
{ .name = "global-env", .key = 'G',
331
379
.arg = "VAR=value",
332
380
.doc = "Environment variable passed to all plugins" },
333
381
{ .name = "options-for", .key = 'o',
334
382
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
335
383
.doc = "Options passed only to specified plugin" },
336
{ .name = "envs-for", .key = 'f',
384
{ .name = "env-for", .key = 'E',
337
385
.arg = "PLUGIN:ENV=value",
338
386
.doc = "Environment variable passed to specified plugin" },
339
387
{ .name = "disable", .key = 'd',
340
388
.arg = "PLUGIN",
341
389
.doc = "Disable a specific plugin", .group = 1 },
390
{ .name = "enable", .key = 'e',
391
.arg = "PLUGIN",
392
.doc = "Enable a specific plugin", .group = 1 },
342
393
{ .name = "plugin-dir", .key = 128,
343
394
.arg = "DIRECTORY",
344
395
.doc = "Specify a different plugin directory", .group = 2 },
353
404
.doc = "Group ID the plugins will run as", .group = 3 },
354
405
{ .name = "debug", .key = 132,
355
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 },
356
416
{ .name = NULL }
357
417
};
358
418
359
error_t parse_opt (int key, char *arg, __attribute__((unused))
360
struct argp_state *state) {
361
/* Get the INPUT argument from `argp_parse', which we know is a
362
pointer to our plugin list pointer. */
363
switch (key) {
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;
364
424
case 'g': /* --global-options */
365
if (arg != NULL){
366
char *p;
367
while((p = strsep(&arg, ",")) != NULL){
368
if(p[0] == '\0'){
369
continue;
370
}
371
if(not add_argument(getplugin(NULL), p)){
372
perror("add_argument");
373
return ARGP_ERR_UNKNOWN;
374
}
375
}
376
}
377
break;
378
case 'e': /* --global-envs */
379
if(arg == NULL){
380
break;
381
}
382
425
{
383
char *envdef = strdup(arg);
384
if(envdef == NULL){
385
break;
386
}
387
if(not add_environment(getplugin(NULL), envdef)){
388
perror("add_environment");
426
char *plugin_option;
427
while((plugin_option = strsep(&arg, ",")) != NULL){
428
if(not add_argument(getplugin(NULL), plugin_option)){
429
break;
430
}
389
431
}
390
432
}
391
433
break;
434
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
436
break;
392
437
case 'o': /* --options-for */
393
if (arg != NULL){
394
char *p_name = strsep(&arg, ":");
395
if(p_name[0] == '\0'){
396
break;
397
}
398
char *opt = strsep(&arg, ":");
399
if(opt[0] == '\0'){
400
break;
401
}
402
if(opt != NULL){
403
char *p;
404
while((p = strsep(&opt, ",")) != NULL){
405
if(p[0] == '\0'){
406
continue;
407
}
408
if(not add_argument(getplugin(p_name), p)){
409
perror("add_argument");
410
return ARGP_ERR_UNKNOWN;
411
}
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;
412
456
}
413
457
}
414
458
}
415
459
break;
416
case 'f': /* --envs-for */
417
if(arg == NULL){
418
break;
419
}
460
case 'E': /* --env-for */
420
461
{
421
462
char *envdef = strchr(arg, ':');
422
463
if(envdef == NULL){
423
break;
424
}
425
char *p_name = strndup(arg, (size_t) (envdef-arg));
426
if(p_name == NULL){
427
break;
428
}
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
466
break;
467
}
468
*envdef = '\0';
429
469
envdef++;
430
if(not add_environment(getplugin(p_name), envdef)){
431
perror("add_environment");
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
432
474
}
475
add_environment(getplugin(arg), envdef, true);
433
476
}
434
477
break;
435
478
case 'd': /* --disable */
436
if (arg != NULL){
437
plugin *p = getplugin(arg);
438
if(p == NULL){
439
return ARGP_ERR_UNKNOWN;
440
}
441
p->disabled = true;
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
}
442
492
}
443
493
break;
444
494
case 128: /* --plugin-dir */
495
free(plugindir);
445
496
plugindir = strdup(arg);
446
if(plugindir == NULL){
447
perror("strdup");
448
}
449
break;
450
case 129: /* --config-file */
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 */
522
debug = true;
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
*/
542
case ARGP_KEY_ARG:
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;
548
}
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);
451
572
argfile = strdup(arg);
452
if(argfile == NULL){
453
perror("strdup");
454
}
455
break;
573
break;
456
574
case 130: /* --userid */
457
uid = (uid_t)strtol(arg, NULL, 10);
458
break;
459
575
case 131: /* --groupid */
460
gid = (gid_t)strtol(arg, NULL, 10);
461
break;
462
576
case 132: /* --debug */
463
debug = true;
464
break;
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
465
580
case ARGP_KEY_ARG:
466
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
467
break;
468
case ARGP_KEY_END:
469
581
break;
470
582
default:
471
583
return ARGP_ERR_UNKNOWN;
472
584
}
473
return 0;
585
return errno;
474
586
}
475
587
476
struct argp argp = { .options = options, .parser = parse_opt,
477
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
588
struct argp argp = { .options = options,
589
.parser = parse_opt_config_file,
590
.args_doc = "",
478
591
.doc = "Mandos plugin runner -- Run plugins" };
479
592
480
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
481
if (ret == ARGP_ERR_UNKNOWN){
482
fprintf(stderr, "Unknown error while parsing arguments\n");
483
exitstatus = EXIT_FAILURE;
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;
484
609
goto fallback;
485
610
}
486
487
/* Opens the configfile if aviable */
488
if (argfile == NULL){
611
612
/* Reset to the normal argument parser */
613
argp.parser = parse_opt;
614
615
/* Open the configfile if available */
616
if(argfile == NULL){
489
617
conffp = fopen(AFILE, "r");
490
618
} else {
491
619
conffp = fopen(argfile, "r");
492
}
620
}
493
621
if(conffp != NULL){
494
622
char *org_line = NULL;
495
623
char *p, *arg, *new_arg, *line;
496
624
size_t size = 0;
497
ssize_t sret;
498
625
const char whitespace_delims[] = " \r\t\f\v\n";
499
626
const char comment_delim[] = "#";
500
627
501
628
custom_argc = 1;
502
629
custom_argv = malloc(sizeof(char*) * 2);
503
630
if(custom_argv == NULL){
504
perror("malloc");
505
exitstatus = EXIT_FAILURE;
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
506
633
goto fallback;
507
634
}
508
635
custom_argv[0] = argv[0];
509
636
custom_argv[1] = NULL;
510
637
511
638
/* for each line in the config file, strip whitespace and ignore
512
639
commented text */
513
640
while(true){
515
642
if(sret == -1){
516
643
break;
517
644
}
518
645
519
646
line = org_line;
520
647
arg = strsep(&line, comment_delim);
521
648
while((p = strsep(&arg, whitespace_delims)) != NULL){
524
651
}
525
652
new_arg = strdup(p);
526
653
if(new_arg == NULL){
527
perror("strdup");
528
exitstatus = EXIT_FAILURE;
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
529
656
free(org_line);
530
657
goto fallback;
531
658
}
534
661
custom_argv = realloc(custom_argv, sizeof(char *)
535
662
* ((unsigned int) custom_argc + 1));
536
663
if(custom_argv == NULL){
537
perror("realloc");
538
exitstatus = EXIT_FAILURE;
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
539
666
free(org_line);
540
667
goto fallback;
541
668
}
542
669
custom_argv[custom_argc-1] = new_arg;
543
custom_argv[custom_argc] = NULL;
670
custom_argv[custom_argc] = NULL;
544
671
}
545
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
}
546
681
free(org_line);
547
} else{
682
} else {
548
683
/* Check for harmful errors and go to fallback. Other errors might
549
684
not affect opening plugins */
550
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
551
perror("fopen");
552
exitstatus = EXIT_FAILURE;
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
553
688
goto fallback;
554
689
}
555
690
}
556
/* If there was any arguments from configuration file,
557
pass them to parser as command arguments */
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
558
693
if(custom_argv != NULL){
559
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
560
if (ret == ARGP_ERR_UNKNOWN){
561
fprintf(stderr, "Unknown error while parsing arguments\n");
562
exitstatus = EXIT_FAILURE;
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;
563
708
goto fallback;
564
709
}
565
710
}
566
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;
729
}
730
567
731
if(debug){
568
732
for(plugin *p = plugin_list; p != NULL; p=p->next){
569
733
fprintf(stderr, "Plugin: %s has %d arguments\n",
571
735
for(char **a = p->argv; *a != NULL; a++){
572
736
fprintf(stderr, "\tArg: %s\n", *a);
573
737
}
574
fprintf(stderr, "...and %u environment variables\n", p->envc);
738
fprintf(stderr, "...and %d environment variables\n", p->envc);
575
739
for(char **a = p->environ; *a != NULL; a++){
576
740
fprintf(stderr, "\t%s\n", *a);
577
741
}
578
742
}
579
743
}
580
581
/* Strip permissions down to nobody */
744
745
{
746
/* Work around Debian bug #633582:
747
<http://bugs.debian.org/633582> */
748
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
749
if(plugindir_fd == -1){
750
error(0, errno, "open");
751
} else {
752
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
753
if(ret == -1){
754
error(0, errno, "fstat");
755
} else {
756
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
757
ret = fchown(plugindir_fd, uid, gid);
758
if(ret == -1){
759
error(0, errno, "fchown");
760
}
761
}
762
}
763
TEMP_FAILURE_RETRY(close(plugindir_fd));
764
}
765
}
766
767
/* Lower permissions */
768
setgid(gid);
769
if(ret == -1){
770
error(0, errno, "setgid");
771
}
582
772
ret = setuid(uid);
583
if (ret == -1){
584
perror("setuid");
585
}
586
setgid(gid);
587
if (ret == -1){
588
perror("setgid");
589
}
590
591
if (plugindir == NULL){
592
dir = opendir(PDIR);
593
} else {
594
dir = opendir(plugindir);
595
}
596
597
if(dir == NULL){
598
perror("Could not open plugin dir");
599
exitstatus = EXIT_FAILURE;
600
goto fallback;
601
}
602
603
/* Set the FD_CLOEXEC flag on the directory, if possible */
773
if(ret == -1){
774
error(0, errno, "setuid");
775
}
776
777
/* Open plugin directory with close_on_exec flag */
604
778
{
605
int dir_fd = dirfd(dir);
606
if(dir_fd >= 0){
607
ret = set_cloexec_flag(dir_fd);
608
if(ret < 0){
609
perror("set_cloexec_flag");
610
exitstatus = EXIT_FAILURE;
611
goto fallback;
612
}
779
int dir_fd = -1;
780
if(plugindir == NULL){
781
dir_fd = open(PDIR, O_RDONLY |
782
#ifdef O_CLOEXEC
783
O_CLOEXEC
784
#else /* not O_CLOEXEC */
785
0
786
#endif /* not O_CLOEXEC */
787
);
788
} else {
789
dir_fd = open(plugindir, O_RDONLY |
790
#ifdef O_CLOEXEC
791
O_CLOEXEC
792
#else /* not O_CLOEXEC */
793
0
794
#endif /* not O_CLOEXEC */
795
);
796
}
797
if(dir_fd == -1){
798
error(0, errno, "Could not open plugin dir");
799
exitstatus = EX_UNAVAILABLE;
800
goto fallback;
801
}
802
803
#ifndef O_CLOEXEC
804
/* Set the FD_CLOEXEC flag on the directory */
805
ret = set_cloexec_flag(dir_fd);
806
if(ret < 0){
807
error(0, errno, "set_cloexec_flag");
808
TEMP_FAILURE_RETRY(close(dir_fd));
809
exitstatus = EX_OSERR;
810
goto fallback;
811
}
812
#endif /* O_CLOEXEC */
813
814
dir = fdopendir(dir_fd);
815
if(dir == NULL){
816
error(0, errno, "Could not open plugin dir");
817
TEMP_FAILURE_RETRY(close(dir_fd));
818
exitstatus = EX_OSERR;
819
goto fallback;
613
820
}
614
821
}
615
822
616
823
FD_ZERO(&rfds_all);
617
824
618
825
/* Read and execute any executable in the plugin directory*/
619
826
while(true){
620
dirst = readdir(dir);
827
do {
828
dirst = readdir(dir);
829
} while(dirst == NULL and errno == EINTR);
621
830
622
// All directory entries have been processed
831
/* All directory entries have been processed */
623
832
if(dirst == NULL){
624
if (errno == EBADF){
625
perror("readdir");
626
exitstatus = EXIT_FAILURE;
833
if(errno == EBADF){
834
error(0, errno, "readdir");
835
exitstatus = EX_IOERR;
627
836
goto fallback;
628
837
}
629
838
break;
631
840
632
841
d_name_len = strlen(dirst->d_name);
633
842
634
// Ignore dotfiles, backup files and other junk
843
/* Ignore dotfiles, backup files and other junk */
635
844
{
636
845
bool bad_name = false;
637
846
639
848
640
849
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
641
850
".dpkg-old",
851
".dpkg-bak",
642
852
".dpkg-divert", NULL };
643
853
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
644
854
size_t pre_len = strlen(*pre);
658
868
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
659
869
size_t suf_len = strlen(*suf);
660
870
if((d_name_len >= suf_len)
661
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
871
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
662
872
== 0)){
663
873
if(debug){
664
874
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
673
883
continue;
674
884
}
675
885
}
676
886
677
887
char *filename;
678
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
888
if(plugindir == NULL){
889
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
890
dirst->d_name));
891
} else {
892
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
893
plugindir,
894
dirst->d_name));
895
}
679
896
if(ret < 0){
680
perror("asprintf");
897
error(0, errno, "asprintf");
681
898
continue;
682
899
}
683
900
684
ret = stat(filename, &st);
685
if (ret == -1){
686
perror("stat");
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
902
if(ret == -1){
903
error(0, errno, "stat");
687
904
free(filename);
688
905
continue;
689
906
}
690
907
691
908
/* Ignore non-executable files */
692
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
909
if(not S_ISREG(st.st_mode)
910
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
693
911
if(debug){
694
912
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
695
913
" with bad type or mode\n", filename);
700
918
701
919
plugin *p = getplugin(dirst->d_name);
702
920
if(p == NULL){
703
perror("getplugin");
921
error(0, errno, "getplugin");
704
922
free(filename);
705
923
continue;
706
924
}
718
936
if(g != NULL){
719
937
for(char **a = g->argv + 1; *a != NULL; a++){
720
938
if(not add_argument(p, *a)){
721
perror("add_argument");
939
error(0, errno, "add_argument");
722
940
}
723
941
}
724
942
/* Add global environment variables */
725
943
for(char **e = g->environ; *e != NULL; e++){
726
if(not add_environment(p, *e)){
727
perror("add_environment");
944
if(not add_environment(p, *e, false)){
945
error(0, errno, "add_environment");
728
946
}
729
947
}
730
948
}
734
952
process, too. */
735
953
if(p->environ[0] != NULL){
736
954
for(char **e = environ; *e != NULL; e++){
737
char *copy = strdup(*e);
738
if(copy == NULL){
739
perror("strdup");
740
continue;
741
}
742
if(not add_environment(p, copy)){
743
perror("add_environment");
955
if(not add_environment(p, *e, false)){
956
error(0, errno, "add_environment");
744
957
}
745
958
}
746
959
}
747
960
748
961
int pipefd[2];
749
ret = pipe(pipefd);
750
if (ret == -1){
751
perror("pipe");
752
exitstatus = EXIT_FAILURE;
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
963
if(ret == -1){
964
error(0, errno, "pipe");
965
exitstatus = EX_OSERR;
753
966
goto fallback;
754
967
}
755
968
/* Ask OS to automatic close the pipe on exec */
756
969
ret = set_cloexec_flag(pipefd[0]);
757
970
if(ret < 0){
758
perror("set_cloexec_flag");
759
exitstatus = EXIT_FAILURE;
971
error(0, errno, "set_cloexec_flag");
972
exitstatus = EX_OSERR;
760
973
goto fallback;
761
974
}
762
975
ret = set_cloexec_flag(pipefd[1]);
763
976
if(ret < 0){
764
perror("set_cloexec_flag");
765
exitstatus = EXIT_FAILURE;
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
766
979
goto fallback;
767
980
}
768
981
/* Block SIGCHLD until process is safely in process list */
769
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
982
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
983
&sigchld_action.sa_mask,
984
NULL));
770
985
if(ret < 0){
771
perror("sigprocmask");
772
exitstatus = EXIT_FAILURE;
986
error(0, errno, "sigprocmask");
987
exitstatus = EX_OSERR;
773
988
goto fallback;
774
989
}
775
// Starting a new process to be watched
776
pid_t pid = fork();
990
/* Starting a new process to be watched */
991
pid_t pid;
992
do {
993
pid = fork();
994
} while(pid == -1 and errno == EINTR);
777
995
if(pid == -1){
778
perror("fork");
779
exitstatus = EXIT_FAILURE;
996
error(0, errno, "fork");
997
exitstatus = EX_OSERR;
780
998
goto fallback;
781
999
}
782
1000
if(pid == 0){
783
1001
/* this is the child process */
784
1002
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
785
1003
if(ret < 0){
786
perror("sigaction");
787
_exit(EXIT_FAILURE);
1004
error(0, errno, "sigaction");
1005
_exit(EX_OSERR);
788
1006
}
789
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1007
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
790
1008
if(ret < 0){
791
perror("sigprocmask");
792
_exit(EXIT_FAILURE);
1009
error(0, errno, "sigprocmask");
1010
_exit(EX_OSERR);
793
1011
}
794
1012
795
1013
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
796
1014
if(ret == -1){
797
perror("dup2");
798
_exit(EXIT_FAILURE);
1015
error(0, errno, "dup2");
1016
_exit(EX_OSERR);
799
1017
}
800
1018
801
1019
if(dirfd(dir) < 0){
805
1023
}
806
1024
if(p->environ[0] == NULL){
807
1025
if(execv(filename, p->argv) < 0){
808
perror("execv");
809
_exit(EXIT_FAILURE);
1026
error(0, errno, "execv for %s", filename);
1027
_exit(EX_OSERR);
810
1028
}
811
1029
} else {
812
1030
if(execve(filename, p->argv, p->environ) < 0){
813
perror("execve");
814
_exit(EXIT_FAILURE);
1031
error(0, errno, "execve for %s", filename);
1032
_exit(EX_OSERR);
815
1033
}
816
1034
}
817
1035
/* no return */
818
1036
}
819
1037
/* Parent process */
820
close(pipefd[1]); /* Close unused write end of pipe */
1038
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1039
pipe */
821
1040
free(filename);
822
1041
plugin *new_plugin = getplugin(dirst->d_name);
823
if (new_plugin == NULL){
824
perror("getplugin");
825
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1042
if(new_plugin == NULL){
1043
error(0, errno, "getplugin");
1044
ret = (int)(TEMP_FAILURE_RETRY
1045
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1046
NULL)));
826
1047
if(ret < 0){
827
perror("sigprocmask");
1048
error(0, errno, "sigprocmask");
828
1049
}
829
exitstatus = EXIT_FAILURE;
1050
exitstatus = EX_OSERR;
830
1051
goto fallback;
831
1052
}
832
1053
835
1056
836
1057
/* Unblock SIGCHLD so signal handler can be run if this process
837
1058
has already completed */
838
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1059
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1060
&sigchld_action.sa_mask,
1061
NULL));
839
1062
if(ret < 0){
840
perror("sigprocmask");
841
exitstatus = EXIT_FAILURE;
1063
error(0, errno, "sigprocmask");
1064
exitstatus = EX_OSERR;
842
1065
goto fallback;
843
1066
}
844
1067
845
FD_SET(new_plugin->fd, &rfds_all);
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1069
-Wconversion */
846
1070
847
if (maxfd < new_plugin->fd){
1071
if(maxfd < new_plugin->fd){
848
1072
maxfd = new_plugin->fd;
849
1073
}
850
851
1074
}
852
1075
853
closedir(dir);
1076
TEMP_FAILURE_RETRY(closedir(dir));
854
1077
dir = NULL;
855
1078
free_plugin(getplugin(NULL));
1079
856
1080
for(plugin *p = plugin_list; p != NULL; p = p->next){
857
1081
if(p->pid != 0){
858
1082
break;
863
1087
free_plugin_list();
864
1088
}
865
1089
}
866
1090
867
1091
/* Main loop while running plugins exist */
868
1092
while(plugin_list){
869
1093
fd_set rfds = rfds_all;
870
1094
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
871
if (select_ret == -1){
872
perror("select");
873
exitstatus = EXIT_FAILURE;
1095
if(select_ret == -1 and errno != EINTR){
1096
error(0, errno, "select");
1097
exitstatus = EX_OSERR;
874
1098
goto fallback;
875
1099
}
876
1100
/* OK, now either a process completed, or something can be read
877
1101
from one of them */
878
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1102
for(plugin *proc = plugin_list; proc != NULL;){
879
1103
/* Is this process completely done? */
880
if(proc->eof and proc->completed){
1104
if(proc->completed and proc->eof){
881
1105
/* Only accept the plugin output if it exited cleanly */
882
1106
if(not WIFEXITED(proc->status)
883
1107
or WEXITSTATUS(proc->status) != 0){
884
1108
/* Bad exit by plugin */
885
1109
886
1110
if(debug){
887
1111
if(WIFEXITED(proc->status)){
888
fprintf(stderr, "Plugin %u exited with status %d\n",
889
(unsigned int) (proc->pid),
1112
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1113
" status %d\n", proc->name,
1114
(intmax_t) (proc->pid),
890
1115
WEXITSTATUS(proc->status));
891
} else if(WIFSIGNALED(proc->status)) {
892
fprintf(stderr, "Plugin %u killed by signal %d\n",
893
(unsigned int) (proc->pid),
894
WTERMSIG(proc->status));
1116
} else if(WIFSIGNALED(proc->status)){
1117
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1118
" signal %d: %s\n", proc->name,
1119
(intmax_t) (proc->pid),
1120
WTERMSIG(proc->status),
1121
strsignal(WTERMSIG(proc->status)));
895
1122
} else if(WCOREDUMP(proc->status)){
896
fprintf(stderr, "Plugin %d dumped core\n",
897
(unsigned int) (proc->pid));
1123
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1124
" core\n", proc->name, (intmax_t) (proc->pid));
898
1125
}
899
1126
}
900
1127
901
1128
/* Remove the plugin */
902
FD_CLR(proc->fd, &rfds_all);
903
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1130
-Wconversion */
1131
904
1132
/* Block signal while modifying process_list */
905
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1134
(SIG_BLOCK,
1135
&sigchld_action.sa_mask,
1136
NULL));
906
1137
if(ret < 0){
907
perror("sigprocmask");
908
exitstatus = EXIT_FAILURE;
1138
error(0, errno, "sigprocmask");
1139
exitstatus = EX_OSERR;
909
1140
goto fallback;
910
1141
}
1142
1143
plugin *next_plugin = proc->next;
911
1144
free_plugin(proc);
1145
proc = next_plugin;
1146
912
1147
/* We are done modifying process list, so unblock signal */
913
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
914
NULL);
1148
ret = (int)(TEMP_FAILURE_RETRY
1149
(sigprocmask(SIG_UNBLOCK,
1150
&sigchld_action.sa_mask, NULL)));
915
1151
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1152
error(0, errno, "sigprocmask");
1153
exitstatus = EX_OSERR;
918
1154
goto fallback;
919
1155
}
920
1156
921
1157
if(plugin_list == NULL){
922
1158
break;
923
1159
}
1160
924
1161
continue;
925
1162
}
926
1163
927
1164
/* This process exited nicely, so print its buffer */
928
1165
929
1166
bool bret = print_out_password(proc->buffer,
930
1167
proc->buffer_length);
931
1168
if(not bret){
932
perror("print_out_password");
933
exitstatus = EXIT_FAILURE;
1169
error(0, errno, "print_out_password");
1170
exitstatus = EX_IOERR;
934
1171
}
935
1172
goto fallback;
936
1173
}
937
1174
938
1175
/* This process has not completed. Does it have any output? */
939
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1176
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1177
warning from
1178
-Wconversion */
940
1179
/* This process had nothing to say at this time */
1180
proc = proc->next;
941
1181
continue;
942
1182
}
943
1183
/* Before reading, make the process' data buffer large enough */
944
1184
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
945
1185
proc->buffer = realloc(proc->buffer, proc->buffer_size
946
1186
+ (size_t) BUFFER_SIZE);
947
if (proc->buffer == NULL){
948
perror("malloc");
949
exitstatus = EXIT_FAILURE;
1187
if(proc->buffer == NULL){
1188
error(0, errno, "malloc");
1189
exitstatus = EX_OSERR;
950
1190
goto fallback;
951
1191
}
952
1192
proc->buffer_size += BUFFER_SIZE;
953
1193
}
954
1194
/* Read from the process */
955
ret = read(proc->fd, proc->buffer + proc->buffer_length,
956
BUFFER_SIZE);
957
if(ret < 0){
1195
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1196
proc->buffer
1197
+ proc->buffer_length,
1198
BUFFER_SIZE));
1199
if(sret < 0){
958
1200
/* Read error from this process; ignore the error */
1201
proc = proc->next;
959
1202
continue;
960
1203
}
961
if(ret == 0){
1204
if(sret == 0){
962
1205
/* got EOF */
963
1206
proc->eof = true;
964
1207
} else {
965
proc->buffer_length += (size_t) ret;
1208
proc->buffer_length += (size_t) sret;
966
1209
}
967
1210
}
968
1211
}
969
970
1212
1213
971
1214
fallback:
972
1215
973
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1216
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1217
and exitstatus != EX_OK)){
974
1218
/* Fallback if all plugins failed, none are found or an error
975
1219
occured */
976
1220
bool bret;
977
1221
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
978
1222
char *passwordbuffer = getpass("Password: ");
979
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1223
size_t len = strlen(passwordbuffer);
1224
/* Strip trailing newline */
1225
if(len > 0 and passwordbuffer[len-1] == '\n'){
1226
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1227
len--;
1228
}
1229
bret = print_out_password(passwordbuffer, len);
980
1230
if(not bret){
981
perror("print_out_password");
982
exitstatus = EXIT_FAILURE;
1231
error(0, errno, "print_out_password");
1232
exitstatus = EX_IOERR;
983
1233
}
984
1234
}
985
1235
986
1236
/* Restore old signal handler */
987
1237
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
988
1238
if(ret == -1){
989
perror("sigaction");
990
exitstatus = EXIT_FAILURE;
1239
error(0, errno, "sigaction");
1240
exitstatus = EX_OSERR;
991
1241
}
992
1242
993
1243
if(custom_argv != NULL){
994
1244
for(char **arg = custom_argv+1; *arg != NULL; arg++){
995
1245
free(*arg);
1001
1251
closedir(dir);
1002
1252
}
1003
1253
1004
/* Free the process list and kill the processes */
1254
/* Kill the processes */
1005
1255
for(plugin *p = plugin_list; p != NULL; p = p->next){
1006
1256
if(p->pid != 0){
1007
1257
close(p->fd);
1008
1258
ret = kill(p->pid, SIGTERM);
1009
1259
if(ret == -1 and errno != ESRCH){
1010
1260
/* Set-uid proccesses might not get closed */
1011
perror("kill");
1261
error(0, errno, "kill");
1012
1262
}
1013
1263
}
1014
1264
}
1015
1265
1016
1266
/* Wait for any remaining child processes to terminate */
1017
do{
1267
do {
1018
1268
ret = wait(NULL);
1019
1269
} while(ret >= 0);
1020
1270
if(errno != ECHILD){
1021
perror("wait");
1271
error(0, errno, "wait");
1022
1272
}
1023
1273
1024
1274
free_plugin_list();
1025
1275
1026
1276
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0