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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- mto: (24.1.164 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
- 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:
- .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 © 2008,2009 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> /* 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
154
136
new_plugin->environ = malloc(sizeof(char *));
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;
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
}
187
215
size_t namelen = (size_t)(strchrnul(def, '=') - def);
188
216
/* Search for this environment variable */
189
217
for(char **e = p->environ; *e != NULL; e++){
190
if(strncmp(*e, def, namelen+1) == 0){
191
/* Refuse to add an existing variable */
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
}
192
231
return true;
193
232
}
194
233
}
198
237
/*
199
238
* Based on the example in the GNU LibC manual chapter 13.13 "File
200
239
* Descriptor Flags".
201
* *Note File Descriptor Flags:(libc)Descriptor Flags.
240
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
202
241
*/
203
static int set_cloexec_flag(int fd)
204
{
205
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));
206
244
/* If reading the flags failed, return error indication now. */
207
245
if(ret < 0){
208
246
return ret;
209
247
}
210
248
/* Store modified flag word in the descriptor. */
211
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
249
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
250
ret | FD_CLOEXEC));
212
251
}
213
252
214
253
215
254
/* Mark processes as completed when they exit, and save their exit
216
255
status. */
217
void handle_sigchld(__attribute__((unused)) int sig){
256
static void handle_sigchld(__attribute__((unused)) int sig){
257
int old_errno = errno;
218
258
while(true){
219
259
plugin *proc = plugin_list;
220
260
int status;
224
264
break;
225
265
}
226
266
if(pid == -1){
227
if (errno != ECHILD){
228
perror("waitpid");
267
if(errno == ECHILD){
268
/* No child processes */
269
break;
229
270
}
230
/* No child processes */
231
break;
271
error(0, errno, "waitpid");
232
272
}
233
273
234
274
/* A child exited, find it in process_list */
235
275
while(proc != NULL and proc->pid != pid){
236
276
proc = proc->next;
240
280
continue;
241
281
}
242
282
proc->status = status;
243
proc->completed = true;
283
proc->completed = 1;
244
284
}
285
errno = old_errno;
245
286
}
246
287
247
288
/* Prints out a password to stdout */
248
bool print_out_password(const char *buffer, size_t length){
289
static bool print_out_password(const char *buffer, size_t length){
249
290
ssize_t ret;
250
if(length>0 and buffer[length-1] == '\n'){
251
length--;
252
}
253
291
for(size_t written = 0; written < length; written += (size_t)ret){
254
292
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
255
293
length - written));
272
310
}
273
311
free(plugin_node->environ);
274
312
free(plugin_node->buffer);
275
313
276
314
/* Removes the plugin from the singly-linked list */
277
315
if(plugin_node == plugin_list){
278
316
/* First one - simple */
306
344
struct stat st;
307
345
fd_set rfds_all;
308
346
int ret, maxfd = 0;
347
ssize_t sret;
309
348
uid_t uid = 65534;
310
349
gid_t gid = 65534;
311
350
bool debug = false;
320
359
sigemptyset(&sigchld_action.sa_mask);
321
360
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
322
361
if(ret == -1){
323
perror("sigaddset");
324
exitstatus = EXIT_FAILURE;
362
error(0, errno, "sigaddset");
363
exitstatus = EX_OSERR;
325
364
goto fallback;
326
365
}
327
366
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
328
367
if(ret == -1){
329
perror("sigaction");
330
exitstatus = EXIT_FAILURE;
368
error(0, errno, "sigaction");
369
exitstatus = EX_OSERR;
331
370
goto fallback;
332
371
}
333
372
336
375
{ .name = "global-options", .key = 'g',
337
376
.arg = "OPTION[,OPTION[,...]]",
338
377
.doc = "Options passed to all plugins" },
339
{ .name = "global-env", .key = 'e',
378
{ .name = "global-env", .key = 'G',
340
379
.arg = "VAR=value",
341
380
.doc = "Environment variable passed to all plugins" },
342
381
{ .name = "options-for", .key = 'o',
343
382
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
344
383
.doc = "Options passed only to specified plugin" },
345
{ .name = "env-for", .key = 'f',
384
{ .name = "env-for", .key = 'E',
346
385
.arg = "PLUGIN:ENV=value",
347
386
.doc = "Environment variable passed to specified plugin" },
348
387
{ .name = "disable", .key = 'd',
349
388
.arg = "PLUGIN",
350
389
.doc = "Disable a specific plugin", .group = 1 },
390
{ .name = "enable", .key = 'e',
391
.arg = "PLUGIN",
392
.doc = "Enable a specific plugin", .group = 1 },
351
393
{ .name = "plugin-dir", .key = 128,
352
394
.arg = "DIRECTORY",
353
395
.doc = "Specify a different plugin directory", .group = 2 },
362
404
.doc = "Group ID the plugins will run as", .group = 3 },
363
405
{ .name = "debug", .key = 132,
364
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 },
365
416
{ .name = NULL }
366
417
};
367
418
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) {
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;
373
424
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
}
391
425
{
392
char *envdef = strdup(arg);
393
if(envdef == NULL){
394
break;
395
}
396
if(not add_environment(getplugin(NULL), envdef)){
397
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
}
398
431
}
399
432
}
400
433
break;
434
case 'G': /* --global-env */
435
add_environment(getplugin(NULL), arg, true);
436
break;
401
437
case 'o': /* --options-for */
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
}
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;
421
456
}
422
457
}
423
458
}
424
459
break;
425
case 'f': /* --env-for */
426
if(arg == NULL){
427
break;
428
}
460
case 'E': /* --env-for */
429
461
{
430
462
char *envdef = strchr(arg, ':');
431
463
if(envdef == NULL){
432
break;
433
}
434
char *p_name = strndup(arg, (size_t) (envdef-arg));
435
if(p_name == NULL){
436
break;
437
}
464
argp_error(state, "No colon in \"%s\"", arg);
465
errno = EINVAL;
466
break;
467
}
468
*envdef = '\0';
438
469
envdef++;
439
if(not add_environment(getplugin(p_name), envdef)){
440
perror("add_environment");
470
if(arg[0] == '\0'){
471
argp_error(state, "Empty plugin name");
472
errno = EINVAL;
473
break;
441
474
}
475
add_environment(getplugin(arg), envdef, true);
442
476
}
443
477
break;
444
478
case 'd': /* --disable */
445
if (arg != NULL){
446
plugin *p = getplugin(arg);
447
if(p == NULL){
448
return ARGP_ERR_UNKNOWN;
449
}
450
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
}
451
492
}
452
493
break;
453
494
case 128: /* --plugin-dir */
495
free(plugindir);
454
496
plugindir = strdup(arg);
455
if(plugindir == NULL){
456
perror("strdup");
457
}
458
break;
459
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);
460
572
argfile = strdup(arg);
461
if(argfile == NULL){
462
perror("strdup");
463
}
464
break;
573
break;
465
574
case 130: /* --userid */
466
uid = (uid_t)strtol(arg, NULL, 10);
467
break;
468
575
case 131: /* --groupid */
469
gid = (gid_t)strtol(arg, NULL, 10);
470
break;
471
576
case 132: /* --debug */
472
debug = true;
473
break;
577
case '?': /* --help */
578
case -3: /* --usage */
579
case 'V': /* --version */
474
580
case ARGP_KEY_ARG:
475
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
476
break;
477
case ARGP_KEY_END:
478
581
break;
479
582
default:
480
583
return ARGP_ERR_UNKNOWN;
481
584
}
482
return 0;
585
return errno;
483
586
}
484
587
485
struct argp argp = { .options = options, .parser = parse_opt,
486
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
588
struct argp argp = { .options = options,
589
.parser = parse_opt_config_file,
590
.args_doc = "",
487
591
.doc = "Mandos plugin runner -- Run plugins" };
488
592
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;
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;
493
609
goto fallback;
494
610
}
495
496
/* Opens the configfile if aviable */
497
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){
498
617
conffp = fopen(AFILE, "r");
499
618
} else {
500
619
conffp = fopen(argfile, "r");
501
}
620
}
502
621
if(conffp != NULL){
503
622
char *org_line = NULL;
504
623
char *p, *arg, *new_arg, *line;
505
624
size_t size = 0;
506
ssize_t sret;
507
625
const char whitespace_delims[] = " \r\t\f\v\n";
508
626
const char comment_delim[] = "#";
509
627
510
628
custom_argc = 1;
511
629
custom_argv = malloc(sizeof(char*) * 2);
512
630
if(custom_argv == NULL){
513
perror("malloc");
514
exitstatus = EXIT_FAILURE;
631
error(0, errno, "malloc");
632
exitstatus = EX_OSERR;
515
633
goto fallback;
516
634
}
517
635
custom_argv[0] = argv[0];
518
636
custom_argv[1] = NULL;
519
637
520
638
/* for each line in the config file, strip whitespace and ignore
521
639
commented text */
522
640
while(true){
524
642
if(sret == -1){
525
643
break;
526
644
}
527
645
528
646
line = org_line;
529
647
arg = strsep(&line, comment_delim);
530
648
while((p = strsep(&arg, whitespace_delims)) != NULL){
533
651
}
534
652
new_arg = strdup(p);
535
653
if(new_arg == NULL){
536
perror("strdup");
537
exitstatus = EXIT_FAILURE;
654
error(0, errno, "strdup");
655
exitstatus = EX_OSERR;
538
656
free(org_line);
539
657
goto fallback;
540
658
}
543
661
custom_argv = realloc(custom_argv, sizeof(char *)
544
662
* ((unsigned int) custom_argc + 1));
545
663
if(custom_argv == NULL){
546
perror("realloc");
547
exitstatus = EXIT_FAILURE;
664
error(0, errno, "realloc");
665
exitstatus = EX_OSERR;
548
666
free(org_line);
549
667
goto fallback;
550
668
}
551
669
custom_argv[custom_argc-1] = new_arg;
552
custom_argv[custom_argc] = NULL;
670
custom_argv[custom_argc] = NULL;
553
671
}
554
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
}
555
681
free(org_line);
556
} else{
682
} else {
557
683
/* Check for harmful errors and go to fallback. Other errors might
558
684
not affect opening plugins */
559
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
560
perror("fopen");
561
exitstatus = EXIT_FAILURE;
685
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
686
error(0, errno, "fopen");
687
exitstatus = EX_OSERR;
562
688
goto fallback;
563
689
}
564
690
}
565
/* If there was any arguments from configuration file,
566
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 */
567
693
if(custom_argv != NULL){
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;
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;
572
708
goto fallback;
573
709
}
574
710
}
575
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
576
731
if(debug){
577
732
for(plugin *p = plugin_list; p != NULL; p=p->next){
578
733
fprintf(stderr, "Plugin: %s has %d arguments\n",
580
735
for(char **a = p->argv; *a != NULL; a++){
581
736
fprintf(stderr, "\tArg: %s\n", *a);
582
737
}
583
fprintf(stderr, "...and %u environment variables\n", p->envc);
738
fprintf(stderr, "...and %d environment variables\n", p->envc);
584
739
for(char **a = p->environ; *a != NULL; a++){
585
740
fprintf(stderr, "\t%s\n", *a);
586
741
}
587
742
}
588
743
}
589
744
590
745
/* Strip permissions down to nobody */
746
setgid(gid);
747
if(ret == -1){
748
error(0, errno, "setgid");
749
}
591
750
ret = setuid(uid);
592
if (ret == -1){
593
perror("setuid");
594
}
595
setgid(gid);
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 */
751
if(ret == -1){
752
error(0, errno, "setuid");
753
}
754
755
/* Open plugin directory with close_on_exec flag */
613
756
{
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
}
757
int dir_fd = -1;
758
if(plugindir == NULL){
759
dir_fd = open(PDIR, O_RDONLY |
760
#ifdef O_CLOEXEC
761
O_CLOEXEC
762
#else /* not O_CLOEXEC */
763
0
764
#endif /* not O_CLOEXEC */
765
);
766
} else {
767
dir_fd = open(plugindir, O_RDONLY |
768
#ifdef O_CLOEXEC
769
O_CLOEXEC
770
#else /* not O_CLOEXEC */
771
0
772
#endif /* not O_CLOEXEC */
773
);
774
}
775
if(dir_fd == -1){
776
error(0, errno, "Could not open plugin dir");
777
exitstatus = EX_UNAVAILABLE;
778
goto fallback;
779
}
780
781
#ifndef O_CLOEXEC
782
/* Set the FD_CLOEXEC flag on the directory */
783
ret = set_cloexec_flag(dir_fd);
784
if(ret < 0){
785
error(0, errno, "set_cloexec_flag");
786
TEMP_FAILURE_RETRY(close(dir_fd));
787
exitstatus = EX_OSERR;
788
goto fallback;
789
}
790
#endif /* O_CLOEXEC */
791
792
dir = fdopendir(dir_fd);
793
if(dir == NULL){
794
error(0, errno, "Could not open plugin dir");
795
TEMP_FAILURE_RETRY(close(dir_fd));
796
exitstatus = EX_OSERR;
797
goto fallback;
622
798
}
623
799
}
624
800
625
801
FD_ZERO(&rfds_all);
626
802
627
803
/* Read and execute any executable in the plugin directory*/
628
804
while(true){
629
dirst = readdir(dir);
805
do {
806
dirst = readdir(dir);
807
} while(dirst == NULL and errno == EINTR);
630
808
631
// All directory entries have been processed
809
/* All directory entries have been processed */
632
810
if(dirst == NULL){
633
if (errno == EBADF){
634
perror("readdir");
635
exitstatus = EXIT_FAILURE;
811
if(errno == EBADF){
812
error(0, errno, "readdir");
813
exitstatus = EX_IOERR;
636
814
goto fallback;
637
815
}
638
816
break;
640
818
641
819
d_name_len = strlen(dirst->d_name);
642
820
643
// Ignore dotfiles, backup files and other junk
821
/* Ignore dotfiles, backup files and other junk */
644
822
{
645
823
bool bad_name = false;
646
824
648
826
649
827
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
650
828
".dpkg-old",
829
".dpkg-bak",
651
830
".dpkg-divert", NULL };
652
831
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
653
832
size_t pre_len = strlen(*pre);
667
846
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
668
847
size_t suf_len = strlen(*suf);
669
848
if((d_name_len >= suf_len)
670
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
849
and (strcmp((dirst->d_name) + d_name_len-suf_len, *suf)
671
850
== 0)){
672
851
if(debug){
673
852
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
682
861
continue;
683
862
}
684
863
}
685
864
686
865
char *filename;
687
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
866
if(plugindir == NULL){
867
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
868
dirst->d_name));
869
} else {
870
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
871
plugindir,
872
dirst->d_name));
873
}
688
874
if(ret < 0){
689
perror("asprintf");
875
error(0, errno, "asprintf");
690
876
continue;
691
877
}
692
878
693
ret = stat(filename, &st);
694
if (ret == -1){
695
perror("stat");
879
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
880
if(ret == -1){
881
error(0, errno, "stat");
696
882
free(filename);
697
883
continue;
698
884
}
699
885
700
886
/* Ignore non-executable files */
701
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
887
if(not S_ISREG(st.st_mode)
888
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
702
889
if(debug){
703
890
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
704
891
" with bad type or mode\n", filename);
709
896
710
897
plugin *p = getplugin(dirst->d_name);
711
898
if(p == NULL){
712
perror("getplugin");
899
error(0, errno, "getplugin");
713
900
free(filename);
714
901
continue;
715
902
}
727
914
if(g != NULL){
728
915
for(char **a = g->argv + 1; *a != NULL; a++){
729
916
if(not add_argument(p, *a)){
730
perror("add_argument");
917
error(0, errno, "add_argument");
731
918
}
732
919
}
733
920
/* Add global environment variables */
734
921
for(char **e = g->environ; *e != NULL; e++){
735
if(not add_environment(p, *e)){
736
perror("add_environment");
922
if(not add_environment(p, *e, false)){
923
error(0, errno, "add_environment");
737
924
}
738
925
}
739
926
}
743
930
process, too. */
744
931
if(p->environ[0] != NULL){
745
932
for(char **e = environ; *e != NULL; e++){
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");
933
if(not add_environment(p, *e, false)){
934
error(0, errno, "add_environment");
753
935
}
754
936
}
755
937
}
756
938
757
939
int pipefd[2];
758
ret = pipe(pipefd);
759
if (ret == -1){
760
perror("pipe");
761
exitstatus = EXIT_FAILURE;
940
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
941
if(ret == -1){
942
error(0, errno, "pipe");
943
exitstatus = EX_OSERR;
762
944
goto fallback;
763
945
}
764
946
/* Ask OS to automatic close the pipe on exec */
765
947
ret = set_cloexec_flag(pipefd[0]);
766
948
if(ret < 0){
767
perror("set_cloexec_flag");
768
exitstatus = EXIT_FAILURE;
949
error(0, errno, "set_cloexec_flag");
950
exitstatus = EX_OSERR;
769
951
goto fallback;
770
952
}
771
953
ret = set_cloexec_flag(pipefd[1]);
772
954
if(ret < 0){
773
perror("set_cloexec_flag");
774
exitstatus = EXIT_FAILURE;
955
error(0, errno, "set_cloexec_flag");
956
exitstatus = EX_OSERR;
775
957
goto fallback;
776
958
}
777
959
/* Block SIGCHLD until process is safely in process list */
778
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
960
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
961
&sigchld_action.sa_mask,
962
NULL));
779
963
if(ret < 0){
780
perror("sigprocmask");
781
exitstatus = EXIT_FAILURE;
964
error(0, errno, "sigprocmask");
965
exitstatus = EX_OSERR;
782
966
goto fallback;
783
967
}
784
// Starting a new process to be watched
785
pid_t pid = fork();
968
/* Starting a new process to be watched */
969
pid_t pid;
970
do {
971
pid = fork();
972
} while(pid == -1 and errno == EINTR);
786
973
if(pid == -1){
787
perror("fork");
788
exitstatus = EXIT_FAILURE;
974
error(0, errno, "fork");
975
exitstatus = EX_OSERR;
789
976
goto fallback;
790
977
}
791
978
if(pid == 0){
792
979
/* this is the child process */
793
980
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
794
981
if(ret < 0){
795
perror("sigaction");
796
_exit(EXIT_FAILURE);
982
error(0, errno, "sigaction");
983
_exit(EX_OSERR);
797
984
}
798
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
985
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
799
986
if(ret < 0){
800
perror("sigprocmask");
801
_exit(EXIT_FAILURE);
987
error(0, errno, "sigprocmask");
988
_exit(EX_OSERR);
802
989
}
803
990
804
991
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
805
992
if(ret == -1){
806
perror("dup2");
807
_exit(EXIT_FAILURE);
993
error(0, errno, "dup2");
994
_exit(EX_OSERR);
808
995
}
809
996
810
997
if(dirfd(dir) < 0){
814
1001
}
815
1002
if(p->environ[0] == NULL){
816
1003
if(execv(filename, p->argv) < 0){
817
perror("execv");
818
_exit(EXIT_FAILURE);
1004
error(0, errno, "execv for %s", filename);
1005
_exit(EX_OSERR);
819
1006
}
820
1007
} else {
821
1008
if(execve(filename, p->argv, p->environ) < 0){
822
perror("execve");
823
_exit(EXIT_FAILURE);
1009
error(0, errno, "execve for %s", filename);
1010
_exit(EX_OSERR);
824
1011
}
825
1012
}
826
1013
/* no return */
827
1014
}
828
1015
/* Parent process */
829
close(pipefd[1]); /* Close unused write end of pipe */
1016
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1017
pipe */
830
1018
free(filename);
831
1019
plugin *new_plugin = getplugin(dirst->d_name);
832
if (new_plugin == NULL){
833
perror("getplugin");
834
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1020
if(new_plugin == NULL){
1021
error(0, errno, "getplugin");
1022
ret = (int)(TEMP_FAILURE_RETRY
1023
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1024
NULL)));
835
1025
if(ret < 0){
836
perror("sigprocmask");
1026
error(0, errno, "sigprocmask");
837
1027
}
838
exitstatus = EXIT_FAILURE;
1028
exitstatus = EX_OSERR;
839
1029
goto fallback;
840
1030
}
841
1031
844
1034
845
1035
/* Unblock SIGCHLD so signal handler can be run if this process
846
1036
has already completed */
847
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1037
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1038
&sigchld_action.sa_mask,
1039
NULL));
848
1040
if(ret < 0){
849
perror("sigprocmask");
850
exitstatus = EXIT_FAILURE;
1041
error(0, errno, "sigprocmask");
1042
exitstatus = EX_OSERR;
851
1043
goto fallback;
852
1044
}
853
1045
854
FD_SET(new_plugin->fd, &rfds_all);
1046
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1047
-Wconversion */
855
1048
856
if (maxfd < new_plugin->fd){
1049
if(maxfd < new_plugin->fd){
857
1050
maxfd = new_plugin->fd;
858
1051
}
859
860
1052
}
861
1053
862
closedir(dir);
1054
TEMP_FAILURE_RETRY(closedir(dir));
863
1055
dir = NULL;
864
1056
free_plugin(getplugin(NULL));
1057
865
1058
for(plugin *p = plugin_list; p != NULL; p = p->next){
866
1059
if(p->pid != 0){
867
1060
break;
872
1065
free_plugin_list();
873
1066
}
874
1067
}
875
1068
876
1069
/* Main loop while running plugins exist */
877
1070
while(plugin_list){
878
1071
fd_set rfds = rfds_all;
879
1072
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
880
if (select_ret == -1){
881
perror("select");
882
exitstatus = EXIT_FAILURE;
1073
if(select_ret == -1 and errno != EINTR){
1074
error(0, errno, "select");
1075
exitstatus = EX_OSERR;
883
1076
goto fallback;
884
1077
}
885
1078
/* OK, now either a process completed, or something can be read
886
1079
from one of them */
887
for(plugin *proc = plugin_list; proc != NULL; proc = proc->next){
1080
for(plugin *proc = plugin_list; proc != NULL;){
888
1081
/* Is this process completely done? */
889
if(proc->eof and proc->completed){
1082
if(proc->completed and proc->eof){
890
1083
/* Only accept the plugin output if it exited cleanly */
891
1084
if(not WIFEXITED(proc->status)
892
1085
or WEXITSTATUS(proc->status) != 0){
893
1086
/* Bad exit by plugin */
894
1087
895
1088
if(debug){
896
1089
if(WIFEXITED(proc->status)){
897
fprintf(stderr, "Plugin %u exited with status %d\n",
898
(unsigned int) (proc->pid),
1090
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1091
" status %d\n", proc->name,
1092
(intmax_t) (proc->pid),
899
1093
WEXITSTATUS(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));
1094
} else if(WIFSIGNALED(proc->status)){
1095
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1096
" signal %d: %s\n", proc->name,
1097
(intmax_t) (proc->pid),
1098
WTERMSIG(proc->status),
1099
strsignal(WTERMSIG(proc->status)));
904
1100
} else if(WCOREDUMP(proc->status)){
905
fprintf(stderr, "Plugin %d dumped core\n",
906
(unsigned int) (proc->pid));
1101
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1102
" core\n", proc->name, (intmax_t) (proc->pid));
907
1103
}
908
1104
}
909
1105
910
1106
/* Remove the plugin */
911
FD_CLR(proc->fd, &rfds_all);
912
1107
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1108
-Wconversion */
1109
913
1110
/* Block signal while modifying process_list */
914
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1111
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1112
(SIG_BLOCK,
1113
&sigchld_action.sa_mask,
1114
NULL));
915
1115
if(ret < 0){
916
perror("sigprocmask");
917
exitstatus = EXIT_FAILURE;
1116
error(0, errno, "sigprocmask");
1117
exitstatus = EX_OSERR;
918
1118
goto fallback;
919
1119
}
1120
1121
plugin *next_plugin = proc->next;
920
1122
free_plugin(proc);
1123
proc = next_plugin;
1124
921
1125
/* We are done modifying process list, so unblock signal */
922
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
923
NULL);
1126
ret = (int)(TEMP_FAILURE_RETRY
1127
(sigprocmask(SIG_UNBLOCK,
1128
&sigchld_action.sa_mask, NULL)));
924
1129
if(ret < 0){
925
perror("sigprocmask");
926
exitstatus = EXIT_FAILURE;
1130
error(0, errno, "sigprocmask");
1131
exitstatus = EX_OSERR;
927
1132
goto fallback;
928
1133
}
929
1134
930
1135
if(plugin_list == NULL){
931
1136
break;
932
1137
}
1138
933
1139
continue;
934
1140
}
935
1141
936
1142
/* This process exited nicely, so print its buffer */
937
1143
938
1144
bool bret = print_out_password(proc->buffer,
939
1145
proc->buffer_length);
940
1146
if(not bret){
941
perror("print_out_password");
942
exitstatus = EXIT_FAILURE;
1147
error(0, errno, "print_out_password");
1148
exitstatus = EX_IOERR;
943
1149
}
944
1150
goto fallback;
945
1151
}
946
1152
947
1153
/* This process has not completed. Does it have any output? */
948
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1154
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1155
warning from
1156
-Wconversion */
949
1157
/* This process had nothing to say at this time */
1158
proc = proc->next;
950
1159
continue;
951
1160
}
952
1161
/* Before reading, make the process' data buffer large enough */
953
1162
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
954
1163
proc->buffer = realloc(proc->buffer, proc->buffer_size
955
1164
+ (size_t) BUFFER_SIZE);
956
if (proc->buffer == NULL){
957
perror("malloc");
958
exitstatus = EXIT_FAILURE;
1165
if(proc->buffer == NULL){
1166
error(0, errno, "malloc");
1167
exitstatus = EX_OSERR;
959
1168
goto fallback;
960
1169
}
961
1170
proc->buffer_size += BUFFER_SIZE;
962
1171
}
963
1172
/* Read from the process */
964
ret = read(proc->fd, proc->buffer + proc->buffer_length,
965
BUFFER_SIZE);
966
if(ret < 0){
1173
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1174
proc->buffer
1175
+ proc->buffer_length,
1176
BUFFER_SIZE));
1177
if(sret < 0){
967
1178
/* Read error from this process; ignore the error */
1179
proc = proc->next;
968
1180
continue;
969
1181
}
970
if(ret == 0){
1182
if(sret == 0){
971
1183
/* got EOF */
972
1184
proc->eof = true;
973
1185
} else {
974
proc->buffer_length += (size_t) ret;
1186
proc->buffer_length += (size_t) sret;
975
1187
}
976
1188
}
977
1189
}
978
979
1190
1191
980
1192
fallback:
981
1193
982
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1194
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1195
and exitstatus != EX_OK)){
983
1196
/* Fallback if all plugins failed, none are found or an error
984
1197
occured */
985
1198
bool bret;
986
1199
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
987
1200
char *passwordbuffer = getpass("Password: ");
988
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1201
size_t len = strlen(passwordbuffer);
1202
/* Strip trailing newline */
1203
if(len > 0 and passwordbuffer[len-1] == '\n'){
1204
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1205
len--;
1206
}
1207
bret = print_out_password(passwordbuffer, len);
989
1208
if(not bret){
990
perror("print_out_password");
991
exitstatus = EXIT_FAILURE;
1209
error(0, errno, "print_out_password");
1210
exitstatus = EX_IOERR;
992
1211
}
993
1212
}
994
1213
995
1214
/* Restore old signal handler */
996
1215
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
997
1216
if(ret == -1){
998
perror("sigaction");
999
exitstatus = EXIT_FAILURE;
1217
error(0, errno, "sigaction");
1218
exitstatus = EX_OSERR;
1000
1219
}
1001
1220
1002
1221
if(custom_argv != NULL){
1003
1222
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1004
1223
free(*arg);
1010
1229
closedir(dir);
1011
1230
}
1012
1231
1013
/* Free the process list and kill the processes */
1232
/* Kill the processes */
1014
1233
for(plugin *p = plugin_list; p != NULL; p = p->next){
1015
1234
if(p->pid != 0){
1016
1235
close(p->fd);
1017
1236
ret = kill(p->pid, SIGTERM);
1018
1237
if(ret == -1 and errno != ESRCH){
1019
1238
/* Set-uid proccesses might not get closed */
1020
perror("kill");
1239
error(0, errno, "kill");
1021
1240
}
1022
1241
}
1023
1242
}
1024
1243
1025
1244
/* Wait for any remaining child processes to terminate */
1026
do{
1245
do {
1027
1246
ret = wait(NULL);
1028
1247
} while(ret >= 0);
1029
1248
if(errno != ECHILD){
1030
perror("wait");
1249
error(0, errno, "wait");
1031
1250
}
1032
1251
1033
1252
free_plugin_list();
1034
1253
1035
1254
free(plugindir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0