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- Committer: Teddy Hogeborn
- Date: 2008-09-01 16:19:32 UTC
- Revision ID: teddy@fukt.bsnet.se-20080901161932-ostp7tulh9aijulh
* plugin-runner.c (add_environment): Never insert existing environment
variables.
(main): Rename "--global-envs" to "--global-env" and "--envs-for" to
"--env-for".
* plugin-runner.xml (SYNOPSIS): Rename "--global-envs" to
"--global-env" and "--envs-for" to
"--env-for".
(OPTIONS): Added "--global-env" and "--env-for".
(FALLBACK): Add id attribute.
(EXIT STATUS): Add text.
(ENVIRONMENT): New section.
(FILES): Document configuration file.
variables.
(main): Rename "--global-envs" to "--global-env" and "--envs-for" to
"--env-for".
* plugin-runner.xml (SYNOPSIS): Rename "--global-envs" to
"--global-env" and "--envs-for" to
"--env-for".
(OPTIONS): Added "--global-env" and "--env-for".
(FALLBACK): Add id attribute.
(EXIT STATUS): Add text.
(ENVIRONMENT): New section.
(FILES): Document configuration file.
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- .bzrignore
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 © 2008-2011 Teddy Hogeborn
6
* Copyright © 2008-2011 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
19
18
* along with this program. If not, see
20
19
* <http://www.gnu.org/licenses/>.
21
20
*
22
* Contact the authors at <mandos@recompile.se>.
21
* Contact the authors at <mandos@fukt.bsnet.se>.
23
22
*/
24
23
25
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
25
asprintf() */
27
26
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
29
realloc() */
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* 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(), strcmp(), strncmp() */
54
#include <string.h> /* strsep, strlen(), asprintf() */
58
55
#include <errno.h> /* errno */
59
56
#include <argp.h> /* struct argp_option, struct
60
57
argp_state, struct argp,
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
#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() */
75
66
76
67
#define BUFFER_SIZE 256
77
68
78
69
#define PDIR "/lib/mandos/plugins.d"
79
70
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
80
71
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
72
const char *argp_program_version = "plugin-runner 1.0";
73
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
74
75
struct plugin;
83
76
84
77
typedef struct plugin{
85
78
char *name; /* can be NULL or any plugin name */
88
81
char **environ;
89
82
int envc;
90
83
bool disabled;
91
84
92
85
/* Variables used for running processes*/
93
86
pid_t pid;
94
87
int fd;
96
89
size_t buffer_size;
97
90
size_t buffer_length;
98
91
bool eof;
99
volatile sig_atomic_t completed;
100
int status;
92
volatile bool completed;
93
volatile int status;
101
94
struct plugin *next;
102
95
} plugin;
103
96
104
97
static plugin *plugin_list = NULL;
105
98
106
/* Gets an existing plugin based on name,
99
/* Gets a existing plugin based on name,
107
100
or if none is found, creates a new one */
108
101
static plugin *getplugin(char *name){
109
/* Check for existing plugin with that name */
110
for(plugin *p = plugin_list; p != NULL; p = p->next){
111
if((p->name == name)
112
or (p->name and name and (strcmp(p->name, name) == 0))){
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))){
113
106
return p;
114
107
}
115
108
}
116
109
/* Create a new plugin */
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){
110
plugin *new_plugin = malloc(sizeof(plugin));
111
if (new_plugin == NULL){
122
112
return NULL;
123
113
}
124
114
char *copy_name = NULL;
125
115
if(name != NULL){
126
do {
127
copy_name = strdup(name);
128
} while(copy_name == NULL and errno == EINTR);
116
copy_name = strdup(name);
129
117
if(copy_name == NULL){
130
int e = errno;
131
free(new_plugin);
132
errno = e;
133
118
return NULL;
134
119
}
135
120
}
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;
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){
147
129
free(copy_name);
148
130
free(new_plugin);
149
errno = e;
150
131
return NULL;
151
132
}
152
133
new_plugin->argv[0] = copy_name;
153
134
new_plugin->argv[1] = NULL;
154
135
155
do {
156
new_plugin->environ = malloc(sizeof(char *));
157
} while(new_plugin->environ == NULL and errno == EINTR);
136
new_plugin->environ = malloc(sizeof(char *));
158
137
if(new_plugin->environ == NULL){
159
int e = errno;
160
138
free(copy_name);
161
139
free(new_plugin->argv);
162
140
free(new_plugin);
163
errno = e;
164
141
return NULL;
165
142
}
166
143
new_plugin->environ[0] = NULL;
174
151
static bool add_to_char_array(const char *new, char ***array,
175
152
int *len){
176
153
/* Resize the pointed-to array to hold one more pointer */
177
do {
178
*array = realloc(*array, sizeof(char *)
179
* (size_t) ((*len) + 2));
180
} while(*array == NULL and errno == EINTR);
154
*array = realloc(*array, sizeof(char *)
155
* (size_t) ((*len) + 2));
181
156
/* Malloc check */
182
157
if(*array == NULL){
183
158
return false;
184
159
}
185
160
/* Make a copy of the new string */
186
char *copy;
187
do {
188
copy = strdup(new);
189
} while(copy == NULL and errno == EINTR);
161
char *copy = strdup(new);
190
162
if(copy == NULL){
191
163
return false;
192
164
}
207
179
}
208
180
209
181
/* Add to a plugin's environment */
210
static bool add_environment(plugin *p, const char *def, bool replace){
182
static bool add_environment(plugin *p, const char *def){
211
183
if(p == NULL){
212
184
return false;
213
185
}
215
187
size_t namelen = (size_t)(strchrnul(def, '=') - def);
216
188
/* Search for this environment variable */
217
189
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
}
190
if(strncmp(*e, def, namelen+1) == 0){
191
/* Refuse to add an existing variable */
231
192
return true;
232
193
}
233
194
}
237
198
/*
238
199
* Based on the example in the GNU LibC manual chapter 13.13 "File
239
200
* Descriptor Flags".
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
201
* *Note File Descriptor Flags:(libc)Descriptor Flags.
241
202
*/
242
static int set_cloexec_flag(int fd){
243
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
203
static int set_cloexec_flag(int fd)
204
{
205
int ret = fcntl(fd, F_GETFD, 0);
244
206
/* If reading the flags failed, return error indication now. */
245
207
if(ret < 0){
246
208
return ret;
247
209
}
248
210
/* Store modified flag word in the descriptor. */
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
250
ret | FD_CLOEXEC));
211
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
251
212
}
252
213
253
214
254
215
/* Mark processes as completed when they exit, and save their exit
255
216
status. */
256
static void handle_sigchld(__attribute__((unused)) int sig){
257
int old_errno = errno;
217
void handle_sigchld(__attribute__((unused)) int sig){
258
218
while(true){
259
219
plugin *proc = plugin_list;
260
220
int status;
264
224
break;
265
225
}
266
226
if(pid == -1){
267
if(errno == ECHILD){
268
/* No child processes */
269
break;
227
if (errno != ECHILD){
228
perror("waitpid");
270
229
}
271
error(0, errno, "waitpid");
230
/* No child processes */
231
break;
272
232
}
273
233
274
234
/* A child exited, find it in process_list */
275
235
while(proc != NULL and proc->pid != pid){
276
236
proc = proc->next;
280
240
continue;
281
241
}
282
242
proc->status = status;
283
proc->completed = 1;
243
proc->completed = true;
284
244
}
285
errno = old_errno;
286
245
}
287
246
288
247
/* Prints out a password to stdout */
289
static bool print_out_password(const char *buffer, size_t length){
248
bool print_out_password(const char *buffer, size_t length){
290
249
ssize_t ret;
250
if(length>0 and buffer[length-1] == '\n'){
251
length--;
252
}
291
253
for(size_t written = 0; written < length; written += (size_t)ret){
292
254
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
293
255
length - written));
310
272
}
311
273
free(plugin_node->environ);
312
274
free(plugin_node->buffer);
313
275
314
276
/* Removes the plugin from the singly-linked list */
315
277
if(plugin_node == plugin_list){
316
278
/* First one - simple */
344
306
struct stat st;
345
307
fd_set rfds_all;
346
308
int ret, maxfd = 0;
347
ssize_t sret;
348
309
uid_t uid = 65534;
349
310
gid_t gid = 65534;
350
311
bool debug = false;
359
320
sigemptyset(&sigchld_action.sa_mask);
360
321
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
361
322
if(ret == -1){
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
323
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
364
325
goto fallback;
365
326
}
366
327
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
367
328
if(ret == -1){
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
329
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
370
331
goto fallback;
371
332
}
372
333
375
336
{ .name = "global-options", .key = 'g',
376
337
.arg = "OPTION[,OPTION[,...]]",
377
338
.doc = "Options passed to all plugins" },
378
{ .name = "global-env", .key = 'G',
339
{ .name = "global-env", .key = 'e',
379
340
.arg = "VAR=value",
380
341
.doc = "Environment variable passed to all plugins" },
381
342
{ .name = "options-for", .key = 'o',
382
343
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
383
344
.doc = "Options passed only to specified plugin" },
384
{ .name = "env-for", .key = 'E',
345
{ .name = "env-for", .key = 'f',
385
346
.arg = "PLUGIN:ENV=value",
386
347
.doc = "Environment variable passed to specified plugin" },
387
348
{ .name = "disable", .key = 'd',
388
349
.arg = "PLUGIN",
389
350
.doc = "Disable a specific plugin", .group = 1 },
390
{ .name = "enable", .key = 'e',
391
.arg = "PLUGIN",
392
.doc = "Enable a specific plugin", .group = 1 },
393
351
{ .name = "plugin-dir", .key = 128,
394
352
.arg = "DIRECTORY",
395
353
.doc = "Specify a different plugin directory", .group = 2 },
404
362
.doc = "Group ID the plugins will run as", .group = 3 },
405
363
{ .name = "debug", .key = 132,
406
364
.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 },
416
365
{ .name = NULL }
417
366
};
418
367
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;
368
error_t parse_opt (int key, char *arg, __attribute__((unused))
369
struct argp_state *state) {
370
/* Get the INPUT argument from `argp_parse', which we know is a
371
pointer to our plugin list pointer. */
372
switch (key) {
424
373
case 'g': /* --global-options */
374
if (arg != NULL){
375
char *p;
376
while((p = strsep(&arg, ",")) != NULL){
377
if(p[0] == '\0'){
378
continue;
379
}
380
if(not add_argument(getplugin(NULL), p)){
381
perror("add_argument");
382
return ARGP_ERR_UNKNOWN;
383
}
384
}
385
}
386
break;
387
case 'e': /* --global-env */
388
if(arg == NULL){
389
break;
390
}
425
391
{
426
char *plugin_option;
427
while((plugin_option = strsep(&arg, ",")) != NULL){
428
if(not add_argument(getplugin(NULL), plugin_option)){
429
break;
430
}
392
char *envdef = strdup(arg);
393
if(envdef == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), envdef)){
397
perror("add_environment");
431
398
}
432
399
}
433
400
break;
434
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
436
break;
437
401
case 'o': /* --options-for */
438
{
439
char *option_list = strchr(arg, ':');
440
if(option_list == NULL){
441
argp_error(state, "No colon in \"%s\"", arg);
442
errno = EINVAL;
443
break;
444
}
445
*option_list = '\0';
446
option_list++;
447
if(arg[0] == '\0'){
448
argp_error(state, "Empty plugin name");
449
errno = EINVAL;
450
break;
451
}
452
char *option;
453
while((option = strsep(&option_list, ",")) != NULL){
454
if(not add_argument(getplugin(arg), option)){
455
break;
402
if (arg != NULL){
403
char *p_name = strsep(&arg, ":");
404
if(p_name[0] == '\0'){
405
break;
406
}
407
char *opt = strsep(&arg, ":");
408
if(opt[0] == '\0'){
409
break;
410
}
411
if(opt != NULL){
412
char *p;
413
while((p = strsep(&opt, ",")) != NULL){
414
if(p[0] == '\0'){
415
continue;
416
}
417
if(not add_argument(getplugin(p_name), p)){
418
perror("add_argument");
419
return ARGP_ERR_UNKNOWN;
420
}
456
421
}
457
422
}
458
423
}
459
424
break;
460
case 'E': /* --env-for */
425
case 'f': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
461
429
{
462
430
char *envdef = strchr(arg, ':');
463
431
if(envdef == NULL){
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
466
break;
467
}
468
*envdef = '\0';
432
break;
433
}
434
char *p_name = strndup(arg, (size_t) (envdef-arg));
435
if(p_name == NULL){
436
break;
437
}
469
438
envdef++;
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
439
if(not add_environment(getplugin(p_name), envdef)){
440
perror("add_environment");
474
441
}
475
add_environment(getplugin(arg), envdef, true);
476
442
}
477
443
break;
478
444
case 'd': /* --disable */
479
{
480
plugin *p = getplugin(arg);
481
if(p != NULL){
482
p->disabled = true;
483
}
484
}
485
break;
486
case 'e': /* --enable */
487
{
488
plugin *p = getplugin(arg);
489
if(p != NULL){
490
p->disabled = false;
491
}
445
if (arg != NULL){
446
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
449
}
450
p->disabled = true;
492
451
}
493
452
break;
494
453
case 128: /* --plugin-dir */
495
free(plugindir);
496
454
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
497
458
break;
498
459
case 129: /* --config-file */
499
/* This is already done by parse_opt_config_file() */
500
break;
460
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
501
465
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;
466
uid = (uid_t)strtol(arg, NULL, 10);
510
467
break;
511
468
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;
469
gid = (gid_t)strtol(arg, NULL, 10);
520
470
break;
521
471
case 132: /* --debug */
522
472
debug = true;
523
473
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);
572
argfile = strdup(arg);
573
break;
574
case 130: /* --userid */
575
case 131: /* --groupid */
576
case 132: /* --debug */
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
580
case ARGP_KEY_ARG:
581
break;
582
default:
583
return ARGP_ERR_UNKNOWN;
584
}
585
return errno;
586
}
587
588
struct argp argp = { .options = options,
589
.parser = parse_opt_config_file,
590
.args_doc = "",
474
case ARGP_KEY_ARG:
475
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
476
break;
477
case ARGP_KEY_END:
478
break;
479
default:
480
return ARGP_ERR_UNKNOWN;
481
}
482
return 0;
483
}
484
485
struct argp argp = { .options = options, .parser = parse_opt,
486
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
591
487
.doc = "Mandos plugin runner -- Run plugins" };
592
488
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;
489
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
490
if (ret == ARGP_ERR_UNKNOWN){
491
fprintf(stderr, "Unknown error while parsing arguments\n");
492
exitstatus = EXIT_FAILURE;
609
493
goto fallback;
610
494
}
611
612
/* Reset to the normal argument parser */
613
argp.parser = parse_opt;
614
615
/* Open the configfile if available */
616
if(argfile == NULL){
495
496
/* Opens the configfile if aviable */
497
if (argfile == NULL){
617
498
conffp = fopen(AFILE, "r");
618
499
} else {
619
500
conffp = fopen(argfile, "r");
620
}
501
}
621
502
if(conffp != NULL){
622
503
char *org_line = NULL;
623
504
char *p, *arg, *new_arg, *line;
624
505
size_t size = 0;
506
ssize_t sret;
625
507
const char whitespace_delims[] = " \r\t\f\v\n";
626
508
const char comment_delim[] = "#";
627
509
628
510
custom_argc = 1;
629
511
custom_argv = malloc(sizeof(char*) * 2);
630
512
if(custom_argv == NULL){
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
633
515
goto fallback;
634
516
}
635
517
custom_argv[0] = argv[0];
636
518
custom_argv[1] = NULL;
637
519
638
520
/* for each line in the config file, strip whitespace and ignore
639
521
commented text */
640
522
while(true){
642
524
if(sret == -1){
643
525
break;
644
526
}
645
527
646
528
line = org_line;
647
529
arg = strsep(&line, comment_delim);
648
530
while((p = strsep(&arg, whitespace_delims)) != NULL){
651
533
}
652
534
new_arg = strdup(p);
653
535
if(new_arg == NULL){
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
656
538
free(org_line);
657
539
goto fallback;
658
540
}
661
543
custom_argv = realloc(custom_argv, sizeof(char *)
662
544
* ((unsigned int) custom_argc + 1));
663
545
if(custom_argv == NULL){
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
666
548
free(org_line);
667
549
goto fallback;
668
550
}
669
551
custom_argv[custom_argc-1] = new_arg;
670
custom_argv[custom_argc] = NULL;
552
custom_argv[custom_argc] = NULL;
671
553
}
672
554
}
673
do {
674
ret = fclose(conffp);
675
} while(ret == EOF and errno == EINTR);
676
if(ret == EOF){
677
error(0, errno, "fclose");
678
exitstatus = EX_IOERR;
679
goto fallback;
680
}
681
555
free(org_line);
682
} else {
556
} else{
683
557
/* Check for harmful errors and go to fallback. Other errors might
684
558
not affect opening plugins */
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
559
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
perror("fopen");
561
exitstatus = EXIT_FAILURE;
688
562
goto fallback;
689
563
}
690
564
}
691
/* If there were any arguments from the configuration file, pass
692
them to parser as command line arguments */
565
/* If there was any arguments from configuration file,
566
pass them to parser as command arguments */
693
567
if(custom_argv != NULL){
694
ret = argp_parse(&argp, custom_argc, custom_argv,
695
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
696
NULL, NULL);
697
switch(ret){
698
case 0:
699
break;
700
case ENOMEM:
701
default:
702
errno = ret;
703
error(0, errno, "argp_parse");
704
exitstatus = EX_OSERR;
705
goto fallback;
706
case EINVAL:
707
exitstatus = EX_CONFIG;
568
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, NULL);
569
if (ret == ARGP_ERR_UNKNOWN){
570
fprintf(stderr, "Unknown error while parsing arguments\n");
571
exitstatus = EXIT_FAILURE;
708
572
goto fallback;
709
573
}
710
574
}
711
575
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
731
576
if(debug){
732
577
for(plugin *p = plugin_list; p != NULL; p=p->next){
733
578
fprintf(stderr, "Plugin: %s has %d arguments\n",
735
580
for(char **a = p->argv; *a != NULL; a++){
736
581
fprintf(stderr, "\tArg: %s\n", *a);
737
582
}
738
fprintf(stderr, "...and %d environment variables\n", p->envc);
583
fprintf(stderr, "...and %u environment variables\n", p->envc);
739
584
for(char **a = p->environ; *a != NULL; a++){
740
585
fprintf(stderr, "\t%s\n", *a);
741
586
}
742
587
}
743
588
}
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 */
589
590
/* Strip permissions down to nobody */
591
ret = setuid(uid);
592
if (ret == -1){
593
perror("setuid");
594
}
768
595
setgid(gid);
769
if(ret == -1){
770
error(0, errno, "setgid");
771
}
772
ret = setuid(uid);
773
if(ret == -1){
774
error(0, errno, "setuid");
775
}
776
777
/* Open plugin directory with close_on_exec flag */
596
if (ret == -1){
597
perror("setgid");
598
}
599
600
if (plugindir == NULL){
601
dir = opendir(PDIR);
602
} else {
603
dir = opendir(plugindir);
604
}
605
606
if(dir == NULL){
607
perror("Could not open plugin dir");
608
exitstatus = EXIT_FAILURE;
609
goto fallback;
610
}
611
612
/* Set the FD_CLOEXEC flag on the directory, if possible */
778
613
{
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;
614
int dir_fd = dirfd(dir);
615
if(dir_fd >= 0){
616
ret = set_cloexec_flag(dir_fd);
617
if(ret < 0){
618
perror("set_cloexec_flag");
619
exitstatus = EXIT_FAILURE;
620
goto fallback;
621
}
820
622
}
821
623
}
822
624
823
625
FD_ZERO(&rfds_all);
824
626
825
627
/* Read and execute any executable in the plugin directory*/
826
628
while(true){
827
do {
828
dirst = readdir(dir);
829
} while(dirst == NULL and errno == EINTR);
629
dirst = readdir(dir);
830
630
831
/* All directory entries have been processed */
631
// All directory entries have been processed
832
632
if(dirst == NULL){
833
if(errno == EBADF){
834
error(0, errno, "readdir");
835
exitstatus = EX_IOERR;
633
if (errno == EBADF){
634
perror("readdir");
635
exitstatus = EXIT_FAILURE;
836
636
goto fallback;
837
637
}
838
638
break;
840
640
841
641
d_name_len = strlen(dirst->d_name);
842
642
843
/* Ignore dotfiles, backup files and other junk */
643
// Ignore dotfiles, backup files and other junk
844
644
{
845
645
bool bad_name = false;
846
646
848
648
849
649
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
850
650
".dpkg-old",
851
".dpkg-bak",
852
651
".dpkg-divert", NULL };
853
652
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
854
653
size_t pre_len = strlen(*pre);
868
667
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
869
668
size_t suf_len = strlen(*suf);
870
669
if((d_name_len >= suf_len)
871
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
670
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
872
671
== 0)){
873
672
if(debug){
874
673
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
883
682
continue;
884
683
}
885
684
}
886
685
887
686
char *filename;
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
}
687
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
896
688
if(ret < 0){
897
error(0, errno, "asprintf");
689
perror("asprintf");
898
690
continue;
899
691
}
900
692
901
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
902
if(ret == -1){
903
error(0, errno, "stat");
693
ret = stat(filename, &st);
694
if (ret == -1){
695
perror("stat");
904
696
free(filename);
905
697
continue;
906
698
}
907
699
908
700
/* Ignore non-executable files */
909
if(not S_ISREG(st.st_mode)
910
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
701
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
911
702
if(debug){
912
703
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
913
704
" with bad type or mode\n", filename);
918
709
919
710
plugin *p = getplugin(dirst->d_name);
920
711
if(p == NULL){
921
error(0, errno, "getplugin");
712
perror("getplugin");
922
713
free(filename);
923
714
continue;
924
715
}
936
727
if(g != NULL){
937
728
for(char **a = g->argv + 1; *a != NULL; a++){
938
729
if(not add_argument(p, *a)){
939
error(0, errno, "add_argument");
730
perror("add_argument");
940
731
}
941
732
}
942
733
/* Add global environment variables */
943
734
for(char **e = g->environ; *e != NULL; e++){
944
if(not add_environment(p, *e, false)){
945
error(0, errno, "add_environment");
735
if(not add_environment(p, *e)){
736
perror("add_environment");
946
737
}
947
738
}
948
739
}
952
743
process, too. */
953
744
if(p->environ[0] != NULL){
954
745
for(char **e = environ; *e != NULL; e++){
955
if(not add_environment(p, *e, false)){
956
error(0, errno, "add_environment");
746
char *copy = strdup(*e);
747
if(copy == NULL){
748
perror("strdup");
749
continue;
750
}
751
if(not add_environment(p, copy)){
752
perror("add_environment");
957
753
}
958
754
}
959
755
}
960
756
961
757
int pipefd[2];
962
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
963
if(ret == -1){
964
error(0, errno, "pipe");
965
exitstatus = EX_OSERR;
758
ret = pipe(pipefd);
759
if (ret == -1){
760
perror("pipe");
761
exitstatus = EXIT_FAILURE;
966
762
goto fallback;
967
763
}
968
764
/* Ask OS to automatic close the pipe on exec */
969
765
ret = set_cloexec_flag(pipefd[0]);
970
766
if(ret < 0){
971
error(0, errno, "set_cloexec_flag");
972
exitstatus = EX_OSERR;
767
perror("set_cloexec_flag");
768
exitstatus = EXIT_FAILURE;
973
769
goto fallback;
974
770
}
975
771
ret = set_cloexec_flag(pipefd[1]);
976
772
if(ret < 0){
977
error(0, errno, "set_cloexec_flag");
978
exitstatus = EX_OSERR;
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
979
775
goto fallback;
980
776
}
981
777
/* Block SIGCHLD until process is safely in process list */
982
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
983
&sigchld_action.sa_mask,
984
NULL));
778
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
985
779
if(ret < 0){
986
error(0, errno, "sigprocmask");
987
exitstatus = EX_OSERR;
780
perror("sigprocmask");
781
exitstatus = EXIT_FAILURE;
988
782
goto fallback;
989
783
}
990
/* Starting a new process to be watched */
991
pid_t pid;
992
do {
993
pid = fork();
994
} while(pid == -1 and errno == EINTR);
784
// Starting a new process to be watched
785
pid_t pid = fork();
995
786
if(pid == -1){
996
error(0, errno, "fork");
997
exitstatus = EX_OSERR;
787
perror("fork");
788
exitstatus = EXIT_FAILURE;
998
789
goto fallback;
999
790
}
1000
791
if(pid == 0){
1001
792
/* this is the child process */
1002
793
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1003
794
if(ret < 0){
1004
error(0, errno, "sigaction");
1005
_exit(EX_OSERR);
795
perror("sigaction");
796
_exit(EXIT_FAILURE);
1006
797
}
1007
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
798
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1008
799
if(ret < 0){
1009
error(0, errno, "sigprocmask");
1010
_exit(EX_OSERR);
800
perror("sigprocmask");
801
_exit(EXIT_FAILURE);
1011
802
}
1012
803
1013
804
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1014
805
if(ret == -1){
1015
error(0, errno, "dup2");
1016
_exit(EX_OSERR);
806
perror("dup2");
807
_exit(EXIT_FAILURE);
1017
808
}
1018
809
1019
810
if(dirfd(dir) < 0){
1023
814
}
1024
815
if(p->environ[0] == NULL){
1025
816
if(execv(filename, p->argv) < 0){
1026
error(0, errno, "execv for %s", filename);
1027
_exit(EX_OSERR);
817
perror("execv");
818
_exit(EXIT_FAILURE);
1028
819
}
1029
820
} else {
1030
821
if(execve(filename, p->argv, p->environ) < 0){
1031
error(0, errno, "execve for %s", filename);
1032
_exit(EX_OSERR);
822
perror("execve");
823
_exit(EXIT_FAILURE);
1033
824
}
1034
825
}
1035
826
/* no return */
1036
827
}
1037
828
/* Parent process */
1038
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1039
pipe */
829
close(pipefd[1]); /* Close unused write end of pipe */
1040
830
free(filename);
1041
831
plugin *new_plugin = getplugin(dirst->d_name);
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)));
832
if (new_plugin == NULL){
833
perror("getplugin");
834
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1047
835
if(ret < 0){
1048
error(0, errno, "sigprocmask");
836
perror("sigprocmask");
1049
837
}
1050
exitstatus = EX_OSERR;
838
exitstatus = EXIT_FAILURE;
1051
839
goto fallback;
1052
840
}
1053
841
1056
844
1057
845
/* Unblock SIGCHLD so signal handler can be run if this process
1058
846
has already completed */
1059
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1060
&sigchld_action.sa_mask,
1061
NULL));
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1062
848
if(ret < 0){
1063
error(0, errno, "sigprocmask");
1064
exitstatus = EX_OSERR;
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
1065
851
goto fallback;
1066
852
}
1067
853
1068
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1069
-Wconversion */
854
FD_SET(new_plugin->fd, &rfds_all);
1070
855
1071
if(maxfd < new_plugin->fd){
856
if (maxfd < new_plugin->fd){
1072
857
maxfd = new_plugin->fd;
1073
858
}
859
1074
860
}
1075
861
1076
TEMP_FAILURE_RETRY(closedir(dir));
862
closedir(dir);
1077
863
dir = NULL;
1078
free_plugin(getplugin(NULL));
1079
864
1080
865
for(plugin *p = plugin_list; p != NULL; p = p->next){
1081
866
if(p->pid != 0){
1082
867
break;
1087
872
free_plugin_list();
1088
873
}
1089
874
}
1090
875
1091
876
/* Main loop while running plugins exist */
1092
877
while(plugin_list){
1093
878
fd_set rfds = rfds_all;
1094
879
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1095
if(select_ret == -1 and errno != EINTR){
1096
error(0, errno, "select");
1097
exitstatus = EX_OSERR;
880
if (select_ret == -1){
881
perror("select");
882
exitstatus = EXIT_FAILURE;
1098
883
goto fallback;
1099
884
}
1100
885
/* OK, now either a process completed, or something can be read
1101
886
from one of them */
1102
for(plugin *proc = plugin_list; proc != NULL;){
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1103
888
/* Is this process completely done? */
1104
if(proc->completed and proc->eof){
889
if(proc->eof and proc->completed){
1105
890
/* Only accept the plugin output if it exited cleanly */
1106
891
if(not WIFEXITED(proc->status)
1107
892
or WEXITSTATUS(proc->status) != 0){
1108
893
/* Bad exit by plugin */
1109
894
1110
895
if(debug){
1111
896
if(WIFEXITED(proc->status)){
1112
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1113
" status %d\n", proc->name,
1114
(intmax_t) (proc->pid),
897
fprintf(stderr, "Plugin %u exited with status %d\n",
898
(unsigned int) (proc->pid),
1115
899
WEXITSTATUS(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)));
900
} else if(WIFSIGNALED(proc->status)) {
901
fprintf(stderr, "Plugin %u killed by signal %d\n",
902
(unsigned int) (proc->pid),
903
WTERMSIG(proc->status));
1122
904
} else if(WCOREDUMP(proc->status)){
1123
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1124
" core\n", proc->name, (intmax_t) (proc->pid));
905
fprintf(stderr, "Plugin %d dumped core\n",
906
(unsigned int) (proc->pid));
1125
907
}
1126
908
}
1127
909
1128
910
/* Remove the plugin */
1129
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1130
-Wconversion */
1131
911
FD_CLR(proc->fd, &rfds_all);
912
1132
913
/* Block signal while modifying process_list */
1133
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1134
(SIG_BLOCK,
1135
&sigchld_action.sa_mask,
1136
NULL));
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1137
915
if(ret < 0){
1138
error(0, errno, "sigprocmask");
1139
exitstatus = EX_OSERR;
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1140
918
goto fallback;
1141
919
}
1142
1143
plugin *next_plugin = proc->next;
1144
920
free_plugin(proc);
1145
proc = next_plugin;
1146
1147
921
/* We are done modifying process list, so unblock signal */
1148
ret = (int)(TEMP_FAILURE_RETRY
1149
(sigprocmask(SIG_UNBLOCK,
1150
&sigchld_action.sa_mask, NULL)));
922
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
NULL);
1151
924
if(ret < 0){
1152
error(0, errno, "sigprocmask");
1153
exitstatus = EX_OSERR;
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1154
927
goto fallback;
1155
928
}
1156
929
1157
930
if(plugin_list == NULL){
1158
931
break;
1159
932
}
1160
1161
933
continue;
1162
934
}
1163
935
1164
936
/* This process exited nicely, so print its buffer */
1165
937
1166
938
bool bret = print_out_password(proc->buffer,
1167
939
proc->buffer_length);
1168
940
if(not bret){
1169
error(0, errno, "print_out_password");
1170
exitstatus = EX_IOERR;
941
perror("print_out_password");
942
exitstatus = EXIT_FAILURE;
1171
943
}
1172
944
goto fallback;
1173
945
}
1174
946
1175
947
/* This process has not completed. Does it have any output? */
1176
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1177
warning from
1178
-Wconversion */
948
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1179
949
/* This process had nothing to say at this time */
1180
proc = proc->next;
1181
950
continue;
1182
951
}
1183
952
/* Before reading, make the process' data buffer large enough */
1184
953
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1185
954
proc->buffer = realloc(proc->buffer, proc->buffer_size
1186
955
+ (size_t) BUFFER_SIZE);
1187
if(proc->buffer == NULL){
1188
error(0, errno, "malloc");
1189
exitstatus = EX_OSERR;
956
if (proc->buffer == NULL){
957
perror("malloc");
958
exitstatus = EXIT_FAILURE;
1190
959
goto fallback;
1191
960
}
1192
961
proc->buffer_size += BUFFER_SIZE;
1193
962
}
1194
963
/* Read from the process */
1195
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1196
proc->buffer
1197
+ proc->buffer_length,
1198
BUFFER_SIZE));
1199
if(sret < 0){
964
ret = read(proc->fd, proc->buffer + proc->buffer_length,
965
BUFFER_SIZE);
966
if(ret < 0){
1200
967
/* Read error from this process; ignore the error */
1201
proc = proc->next;
1202
968
continue;
1203
969
}
1204
if(sret == 0){
970
if(ret == 0){
1205
971
/* got EOF */
1206
972
proc->eof = true;
1207
973
} else {
1208
proc->buffer_length += (size_t) sret;
974
proc->buffer_length += (size_t) ret;
1209
975
}
1210
976
}
1211
977
}
1212
1213
978
979
1214
980
fallback:
1215
981
1216
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1217
and exitstatus != EX_OK)){
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1218
983
/* Fallback if all plugins failed, none are found or an error
1219
984
occured */
1220
985
bool bret;
1221
986
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1222
987
char *passwordbuffer = getpass("Password: ");
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);
988
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1230
989
if(not bret){
1231
error(0, errno, "print_out_password");
1232
exitstatus = EX_IOERR;
990
perror("print_out_password");
991
exitstatus = EXIT_FAILURE;
1233
992
}
1234
993
}
1235
994
1236
995
/* Restore old signal handler */
1237
996
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1238
997
if(ret == -1){
1239
error(0, errno, "sigaction");
1240
exitstatus = EX_OSERR;
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1241
1000
}
1242
1001
1243
1002
if(custom_argv != NULL){
1244
1003
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1245
1004
free(*arg);
1251
1010
closedir(dir);
1252
1011
}
1253
1012
1254
/* Kill the processes */
1013
/* Free the process list and kill the processes */
1255
1014
for(plugin *p = plugin_list; p != NULL; p = p->next){
1256
1015
if(p->pid != 0){
1257
1016
close(p->fd);
1258
1017
ret = kill(p->pid, SIGTERM);
1259
1018
if(ret == -1 and errno != ESRCH){
1260
1019
/* Set-uid proccesses might not get closed */
1261
error(0, errno, "kill");
1020
perror("kill");
1262
1021
}
1263
1022
}
1264
1023
}
1265
1024
1266
1025
/* Wait for any remaining child processes to terminate */
1267
do {
1026
do{
1268
1027
ret = wait(NULL);
1269
1028
} while(ret >= 0);
1270
1029
if(errno != ECHILD){
1271
error(0, errno, "wait");
1030
perror("wait");
1272
1031
}
1273
1032
1274
1033
free_plugin_list();
1275
1034
1276
1035
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0