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- Committer: Teddy Hogeborn
- Date: 2008-08-25 07:52:35 UTC
- Revision ID: teddy@fukt.bsnet.se-20080825075235-gq338t4ywhqhire8
* mandos-clients.conf.xml (DESCRIPTION): Do not imply that this is the
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
only configuration file of
mandos(8).
(OPTIONS): Note that unknown options are ignored. When describing
"checker", be more specific about exit codes, and refer
to PATH. When describing "secret", refer to
mandos-keygen(8), and note the relationship with
"secfile". Added synopsis to "secfile", and note
relationship with "secret". Added synopsis and more text
to "host".
(EXAMPLE): Remove Radix-64 checksum from "secret" option value.
(SEE ALSO): New section, refer to mandos(8), mandos-keygen(8), and
mandos.conf(5).
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
7
6
*
8
7
* This program is free software: you can redistribute it and/or
9
8
* modify it under the terms of the GNU General Public License as
28
27
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
28
EXIT_SUCCESS, realloc() */
30
29
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
30
#include <stdio.h> /* perror, popen(), fileno(),
31
fprintf(), stderr, STDOUT_FILENO */
33
32
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
33
stat, waitpid(), WIFEXITED(),
35
34
WEXITSTATUS(), wait(), pid_t,
47
46
fcntl(), setuid(), setgid(),
48
47
F_GETFD, F_SETFD, FD_CLOEXEC,
49
48
access(), pipe(), fork(), close()
50
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
51
50
execv(), write(), read(),
52
51
close() */
53
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
66
65
#include <errno.h> /* errno, EBADF */
67
66
68
67
#define BUFFER_SIZE 256
69
70
#define PDIR "/lib/mandos/plugins.d"
71
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
72
73
const char *argp_program_version = "plugin-runner " VERSION;
68
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
70
const char *argp_program_version = "plugin-runner 1.0";
74
71
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
75
72
76
typedef struct plugin{
77
char *name; /* can be NULL or any plugin name */
78
char **argv;
79
int argc;
80
char **environ;
81
int envc;
82
bool disabled;
73
struct process;
83
74
84
/* Variables used for running processes*/
75
typedef struct process{
85
76
pid_t pid;
86
77
int fd;
87
78
char *buffer;
90
81
bool eof;
91
82
volatile bool completed;
92
83
volatile int status;
84
struct process *next;
85
} process;
86
87
typedef struct plugin{
88
char *name; /* can be NULL or any plugin name */
89
char **argv;
90
int argc;
91
char **environ;
92
int envc;
93
bool disabled;
93
94
struct plugin *next;
94
95
} plugin;
95
96
96
static plugin *plugin_list = NULL;
97
98
/* Gets an existing plugin based on name,
99
or if none is found, creates a new one */
100
static plugin *getplugin(char *name){
101
/* Check for exiting plugin with that name */
102
for (plugin *p = plugin_list; p != NULL; p = p->next){
97
static plugin *getplugin(char *name, plugin **plugin_list){
98
for (plugin *p = *plugin_list; p != NULL; p = p->next){
103
99
if ((p->name == name)
104
100
or (p->name and name and (strcmp(p->name, name) == 0))){
105
101
return p;
120
116
121
117
*new_plugin = (plugin) { .name = copy_name,
122
118
.argc = 1,
119
.envc = 0,
123
120
.disabled = false,
124
.next = plugin_list };
121
.next = *plugin_list };
125
122
126
123
new_plugin->argv = malloc(sizeof(char *) * 2);
127
124
if (new_plugin->argv == NULL){
131
128
}
132
129
new_plugin->argv[0] = copy_name;
133
130
new_plugin->argv[1] = NULL;
134
131
135
132
new_plugin->environ = malloc(sizeof(char *));
136
133
if(new_plugin->environ == NULL){
137
134
free(copy_name);
140
137
return NULL;
141
138
}
142
139
new_plugin->environ[0] = NULL;
143
144
140
/* Append the new plugin to the list */
145
plugin_list = new_plugin;
141
*plugin_list = new_plugin;
146
142
return new_plugin;
147
143
}
148
144
178
174
}
179
175
180
176
/* Add to a plugin's environment */
181
static bool add_environment(plugin *p, const char *def, bool replace){
177
static bool add_environment(plugin *p, const char *def){
182
178
if(p == NULL){
183
179
return false;
184
180
}
185
/* namelen = length of name of environment variable */
186
size_t namelen = (size_t)(strchrnul(def, '=') - def);
187
/* Search for this environment variable */
188
for(char **e = p->environ; *e != NULL; e++){
189
if(strncmp(*e, def, namelen + 1) == 0){
190
/* It already exists */
191
if(replace){
192
char *new = realloc(*e, strlen(def) + 1);
193
if(new == NULL){
194
return false;
195
}
196
*e = new;
197
strcpy(*e, def);
198
}
199
return true;
200
}
201
}
202
181
return add_to_char_array(def, &(p->environ), &(p->envc));
203
182
}
204
183
184
205
185
/*
206
186
* Based on the example in the GNU LibC manual chapter 13.13 "File
207
187
* Descriptor Flags".
208
188
* *Note File Descriptor Flags:(libc)Descriptor Flags.
209
189
*/
210
static int set_cloexec_flag(int fd){
190
static int set_cloexec_flag(int fd)
191
{
211
192
int ret = fcntl(fd, F_GETFD, 0);
212
193
/* If reading the flags failed, return error indication now. */
213
194
if(ret < 0){
217
198
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
218
199
}
219
200
201
process *process_list = NULL;
220
202
221
203
/* Mark processes as completed when they exit, and save their exit
222
204
status. */
223
static void handle_sigchld(__attribute__((unused)) int sig){
205
void handle_sigchld(__attribute__((unused)) int sig){
224
206
while(true){
225
plugin *proc = plugin_list;
207
process *proc = process_list;
226
208
int status;
227
209
pid_t pid = waitpid(-1, &status, WNOHANG);
228
210
if(pid == 0){
236
218
/* No child processes */
237
219
break;
238
220
}
239
221
240
222
/* A child exited, find it in process_list */
241
223
while(proc != NULL and proc->pid != pid){
242
224
proc = proc->next;
250
232
}
251
233
}
252
234
253
/* Prints out a password to stdout */
254
static bool print_out_password(const char *buffer, size_t length){
235
bool print_out_password(const char *buffer, size_t length){
255
236
ssize_t ret;
237
if(length>0 and buffer[length-1] == '\n'){
238
length--;
239
}
256
240
for(size_t written = 0; written < length; written += (size_t)ret){
257
241
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
258
242
length - written));
263
247
return true;
264
248
}
265
249
266
/* Removes and free a plugin from the plugin list */
267
static void free_plugin(plugin *plugin_node){
268
269
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
270
free(*arg);
271
}
272
free(plugin_node->argv);
273
for(char **env = plugin_node->environ; *env != NULL; env++){
274
free(*env);
275
}
276
free(plugin_node->environ);
277
free(plugin_node->buffer);
278
279
/* Removes the plugin from the singly-linked list */
280
if(plugin_node == plugin_list){
281
/* First one - simple */
282
plugin_list = plugin_list->next;
283
} else {
284
/* Second one or later */
285
for(plugin *p = plugin_list; p != NULL; p = p->next){
286
if(p->next == plugin_node){
287
p->next = plugin_node->next;
288
break;
289
}
250
char **add_to_argv(char **argv, int *argc, char *arg){
251
if (argv == NULL){
252
*argc = 1;
253
argv = malloc(sizeof(char*) * 2);
254
if(argv == NULL){
255
return NULL;
290
256
}
291
}
292
293
free(plugin_node);
257
argv[0] = NULL; /* Will be set to argv[0] in main before
258
parsing */
259
argv[1] = NULL;
260
}
261
*argc += 1;
262
argv = realloc(argv, sizeof(char *)
263
* ((unsigned int) *argc + 1));
264
if(argv == NULL){
265
return NULL;
266
}
267
argv[*argc-1] = arg;
268
argv[*argc] = NULL;
269
return argv;
294
270
}
295
271
296
static void free_plugin_list(void){
297
while(plugin_list != NULL){
298
free_plugin(plugin_list);
272
static void free_plugin_list(plugin *plugin_list){
273
for(plugin *next; plugin_list != NULL; plugin_list = next){
274
next = plugin_list->next;
275
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
276
free(*arg);
277
}
278
free(plugin_list->argv);
279
for(char **env = plugin_list->environ; *env != NULL; env++){
280
free(*env);
281
}
282
free(plugin_list->environ);
283
free(plugin_list);
299
284
}
300
285
}
301
286
302
287
int main(int argc, char *argv[]){
303
char *plugindir = NULL;
304
char *argfile = NULL;
288
const char *plugindir = "/lib/mandos/plugins.d";
289
const char *argfile = ARGFILE;
305
290
FILE *conffp;
306
291
size_t d_name_len;
307
292
DIR *dir = NULL;
309
294
struct stat st;
310
295
fd_set rfds_all;
311
296
int ret, maxfd = 0;
312
ssize_t sret;
313
297
uid_t uid = 65534;
314
298
gid_t gid = 65534;
315
299
bool debug = false;
340
324
{ .name = "global-options", .key = 'g',
341
325
.arg = "OPTION[,OPTION[,...]]",
342
326
.doc = "Options passed to all plugins" },
343
{ .name = "global-env", .key = 'G',
327
{ .name = "global-envs", .key = 'e',
344
328
.arg = "VAR=value",
345
329
.doc = "Environment variable passed to all plugins" },
346
330
{ .name = "options-for", .key = 'o',
347
331
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
348
332
.doc = "Options passed only to specified plugin" },
349
{ .name = "env-for", .key = 'E',
333
{ .name = "envs-for", .key = 'f',
350
334
.arg = "PLUGIN:ENV=value",
351
335
.doc = "Environment variable passed to specified plugin" },
352
336
{ .name = "disable", .key = 'd',
353
337
.arg = "PLUGIN",
354
338
.doc = "Disable a specific plugin", .group = 1 },
355
{ .name = "enable", .key = 'e',
356
.arg = "PLUGIN",
357
.doc = "Enable a specific plugin", .group = 1 },
358
339
{ .name = "plugin-dir", .key = 128,
359
340
.arg = "DIRECTORY",
360
341
.doc = "Specify a different plugin directory", .group = 2 },
361
{ .name = "config-file", .key = 129,
362
.arg = "FILE",
363
.doc = "Specify a different configuration file", .group = 2 },
364
{ .name = "userid", .key = 130,
365
.arg = "ID", .flags = 0,
366
.doc = "User ID the plugins will run as", .group = 3 },
367
{ .name = "groupid", .key = 131,
368
.arg = "ID", .flags = 0,
369
.doc = "Group ID the plugins will run as", .group = 3 },
370
{ .name = "debug", .key = 132,
371
.doc = "Debug mode", .group = 4 },
342
{ .name = "userid", .key = 129,
343
.arg = "ID", .flags = 0,
344
.doc = "User ID the plugins will run as", .group = 2 },
345
{ .name = "groupid", .key = 130,
346
.arg = "ID", .flags = 0,
347
.doc = "Group ID the plugins will run as", .group = 2 },
348
{ .name = "debug", .key = 131,
349
.doc = "Debug mode", .group = 3 },
372
350
{ .name = NULL }
373
351
};
374
352
375
error_t parse_opt (int key, char *arg, __attribute__((unused))
376
struct argp_state *state) {
353
error_t parse_opt (int key, char *arg, struct argp_state *state) {
354
/* Get the INPUT argument from `argp_parse', which we know is a
355
pointer to our plugin list pointer. */
356
plugin **plugins = state->input;
377
357
switch (key) {
378
case 'g': /* --global-options */
358
case 'g':
379
359
if (arg != NULL){
380
360
char *p;
381
361
while((p = strsep(&arg, ",")) != NULL){
382
362
if(p[0] == '\0'){
383
363
continue;
384
364
}
385
if(not add_argument(getplugin(NULL), p)){
365
if(not add_argument(getplugin(NULL, plugins), p)){
386
366
perror("add_argument");
387
367
return ARGP_ERR_UNKNOWN;
388
368
}
389
369
}
390
370
}
391
371
break;
392
case 'G': /* --global-env */
372
case 'e':
393
373
if(arg == NULL){
394
374
break;
395
375
}
396
if(not add_environment(getplugin(NULL), arg, true)){
397
perror("add_environment");
376
{
377
char *envdef = strdup(arg);
378
if(envdef == NULL){
379
break;
380
}
381
if(not add_environment(getplugin(NULL, plugins), envdef)){
382
perror("add_environment");
383
}
398
384
}
399
385
break;
400
case 'o': /* --options-for */
386
case 'o':
401
387
if (arg != NULL){
402
388
char *p_name = strsep(&arg, ":");
403
if(p_name[0] == '\0' or arg == NULL){
389
if(p_name[0] == '\0'){
404
390
break;
405
391
}
406
392
char *opt = strsep(&arg, ":");
407
if(opt[0] == '\0' or opt == NULL){
393
if(opt[0] == '\0'){
408
394
break;
409
395
}
410
char *p;
411
while((p = strsep(&opt, ",")) != NULL){
412
if(p[0] == '\0'){
413
continue;
414
}
415
if(not add_argument(getplugin(p_name), p)){
416
perror("add_argument");
417
return ARGP_ERR_UNKNOWN;
396
if(opt != NULL){
397
char *p;
398
while((p = strsep(&opt, ",")) != NULL){
399
if(p[0] == '\0'){
400
continue;
401
}
402
if(not add_argument(getplugin(p_name, plugins), p)){
403
perror("add_argument");
404
return ARGP_ERR_UNKNOWN;
405
}
418
406
}
419
407
}
420
408
}
421
409
break;
422
case 'E': /* --env-for */
410
case 'f':
423
411
if(arg == NULL){
424
412
break;
425
413
}
428
416
if(envdef == NULL){
429
417
break;
430
418
}
431
*envdef = '\0';
432
if(not add_environment(getplugin(arg), envdef+1, true)){
419
char *p_name = strndup(arg, (size_t) (envdef-arg));
420
if(p_name == NULL){
421
break;
422
}
423
envdef++;
424
if(not add_environment(getplugin(p_name, plugins), envdef)){
433
425
perror("add_environment");
434
426
}
435
427
}
436
428
break;
437
case 'd': /* --disable */
429
case 'd':
438
430
if (arg != NULL){
439
plugin *p = getplugin(arg);
431
plugin *p = getplugin(arg, plugins);
440
432
if(p == NULL){
441
433
return ARGP_ERR_UNKNOWN;
442
434
}
443
435
p->disabled = true;
444
436
}
445
437
break;
446
case 'e': /* --enable */
447
if (arg != NULL){
448
plugin *p = getplugin(arg);
449
if(p == NULL){
450
return ARGP_ERR_UNKNOWN;
451
}
452
p->disabled = false;
453
}
454
break;
455
case 128: /* --plugin-dir */
456
free(plugindir);
457
plugindir = strdup(arg);
458
if(plugindir == NULL){
459
perror("strdup");
460
}
461
break;
462
case 129: /* --config-file */
463
/* This is already done by parse_opt_config_file() */
464
break;
465
case 130: /* --userid */
438
case 128:
439
plugindir = arg;
440
break;
441
case 129:
466
442
uid = (uid_t)strtol(arg, NULL, 10);
467
443
break;
468
case 131: /* --groupid */
444
case 130:
469
445
gid = (gid_t)strtol(arg, NULL, 10);
470
446
break;
471
case 132: /* --debug */
447
case 131:
472
448
debug = true;
473
449
break;
474
450
case ARGP_KEY_ARG:
475
/* Cryptsetup always passes an argument, which is an empty
476
string if "none" was specified in /etc/crypttab. So if
477
argument was empty, we ignore it silently. */
478
if(arg[0] != '\0'){
479
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
480
}
481
break;
482
case ARGP_KEY_END:
483
break;
484
default:
485
return ARGP_ERR_UNKNOWN;
486
}
487
return 0;
488
}
489
490
/* This option parser is the same as parse_opt() above, except it
491
ignores everything but the --config-file option. */
492
error_t parse_opt_config_file (int key, char *arg,
493
__attribute__((unused))
494
struct argp_state *state) {
495
switch (key) {
496
case 'g': /* --global-options */
497
case 'G': /* --global-env */
498
case 'o': /* --options-for */
499
case 'E': /* --env-for */
500
case 'd': /* --disable */
501
case 'e': /* --enable */
502
case 128: /* --plugin-dir */
503
break;
504
case 129: /* --config-file */
505
free(argfile);
506
argfile = strdup(arg);
507
if(argfile == NULL){
508
perror("strdup");
509
}
510
break;
511
case 130: /* --userid */
512
case 131: /* --groupid */
513
case 132: /* --debug */
514
case ARGP_KEY_ARG:
515
case ARGP_KEY_END:
516
break;
517
default:
518
return ARGP_ERR_UNKNOWN;
519
}
520
return 0;
521
}
522
523
struct argp argp = { .options = options,
524
.parser = parse_opt_config_file,
525
.args_doc = "",
451
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
452
break;
453
case ARGP_KEY_END:
454
break;
455
default:
456
return ARGP_ERR_UNKNOWN;
457
}
458
return 0;
459
}
460
461
plugin *plugin_list = NULL;
462
463
struct argp argp = { .options = options, .parser = parse_opt,
464
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
526
465
.doc = "Mandos plugin runner -- Run plugins" };
527
466
528
/* Parse using the parse_opt_config_file in order to get the custom
529
config file location, if any. */
530
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
467
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
531
468
if (ret == ARGP_ERR_UNKNOWN){
532
469
fprintf(stderr, "Unknown error while parsing arguments\n");
533
470
exitstatus = EXIT_FAILURE;
534
471
goto fallback;
535
472
}
536
537
/* Reset to the normal argument parser */
538
argp.parser = parse_opt;
539
540
/* Open the configfile if available */
541
if (argfile == NULL){
542
conffp = fopen(AFILE, "r");
543
} else {
544
conffp = fopen(argfile, "r");
545
}
473
474
conffp = fopen(argfile, "r");
546
475
if(conffp != NULL){
547
476
char *org_line = NULL;
548
477
char *p, *arg, *new_arg, *line;
549
478
size_t size = 0;
479
ssize_t sret;
550
480
const char whitespace_delims[] = " \r\t\f\v\n";
551
481
const char comment_delim[] = "#";
552
482
553
custom_argc = 1;
554
custom_argv = malloc(sizeof(char*) * 2);
555
if(custom_argv == NULL){
556
perror("malloc");
557
exitstatus = EXIT_FAILURE;
558
goto fallback;
559
}
560
custom_argv[0] = argv[0];
561
custom_argv[1] = NULL;
562
563
/* for each line in the config file, strip whitespace and ignore
564
commented text */
565
483
while(true){
566
484
sret = getline(&org_line, &size, conffp);
567
485
if(sret == -1){
575
493
continue;
576
494
}
577
495
new_arg = strdup(p);
578
if(new_arg == NULL){
579
perror("strdup");
580
exitstatus = EXIT_FAILURE;
581
free(org_line);
582
goto fallback;
583
}
584
585
custom_argc += 1;
586
custom_argv = realloc(custom_argv, sizeof(char *)
587
* ((unsigned int) custom_argc + 1));
588
if(custom_argv == NULL){
589
perror("realloc");
590
exitstatus = EXIT_FAILURE;
591
free(org_line);
592
goto fallback;
593
}
594
custom_argv[custom_argc-1] = new_arg;
595
custom_argv[custom_argc] = NULL;
496
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
497
if (custom_argv == NULL){
498
perror("add_to_argv");
499
exitstatus = EXIT_FAILURE;
500
goto fallback;
501
}
596
502
}
597
503
}
598
504
free(org_line);
599
} else {
505
} else{
600
506
/* Check for harmful errors and go to fallback. Other errors might
601
507
not affect opening plugins */
602
508
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
605
511
goto fallback;
606
512
}
607
513
}
608
/* If there was any arguments from configuration file,
609
pass them to parser as command arguments */
514
610
515
if(custom_argv != NULL){
611
ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
612
0, NULL);
516
custom_argv[0] = argv[0];
517
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0,
518
&plugin_list);
613
519
if (ret == ARGP_ERR_UNKNOWN){
614
520
fprintf(stderr, "Unknown error while parsing arguments\n");
615
521
exitstatus = EXIT_FAILURE;
617
523
}
618
524
}
619
525
620
/* Parse actual command line arguments, to let them override the
621
config file */
622
ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
623
if (ret == ARGP_ERR_UNKNOWN){
624
fprintf(stderr, "Unknown error while parsing arguments\n");
625
exitstatus = EXIT_FAILURE;
626
goto fallback;
627
}
628
629
526
if(debug){
630
527
for(plugin *p = plugin_list; p != NULL; p=p->next){
631
528
fprintf(stderr, "Plugin: %s has %d arguments\n",
640
537
}
641
538
}
642
539
643
/* Strip permissions down to nobody */
644
540
ret = setuid(uid);
645
541
if (ret == -1){
646
542
perror("setuid");
647
}
543
}
544
648
545
setgid(gid);
649
546
if (ret == -1){
650
547
perror("setgid");
651
548
}
652
549
653
if (plugindir == NULL){
654
dir = opendir(PDIR);
655
} else {
656
dir = opendir(plugindir);
657
}
658
550
dir = opendir(plugindir);
659
551
if(dir == NULL){
660
552
perror("Could not open plugin dir");
661
553
exitstatus = EXIT_FAILURE;
677
569
678
570
FD_ZERO(&rfds_all);
679
571
680
/* Read and execute any executable in the plugin directory*/
681
572
while(true){
682
573
dirst = readdir(dir);
683
574
684
/* All directory entries have been processed */
575
// All directory entries have been processed
685
576
if(dirst == NULL){
686
577
if (errno == EBADF){
687
578
perror("readdir");
693
584
694
585
d_name_len = strlen(dirst->d_name);
695
586
696
/* Ignore dotfiles, backup files and other junk */
587
// Ignore dotfiles, backup files and other junk
697
588
{
698
589
bool bad_name = false;
699
590
701
592
702
593
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
703
594
".dpkg-old",
704
".dpkg-bak",
705
595
".dpkg-divert", NULL };
706
596
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
707
597
size_t pre_len = strlen(*pre);
715
605
break;
716
606
}
717
607
}
608
718
609
if(bad_name){
719
610
continue;
720
611
}
612
721
613
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
722
614
size_t suf_len = strlen(*suf);
723
615
if((d_name_len >= suf_len)
738
630
}
739
631
740
632
char *filename;
741
if(plugindir == NULL){
742
ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
743
} else {
744
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
745
}
633
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
746
634
if(ret < 0){
747
635
perror("asprintf");
748
636
continue;
754
642
free(filename);
755
643
continue;
756
644
}
757
758
/* Ignore non-executable files */
645
759
646
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
760
647
if(debug){
761
648
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
764
651
free(filename);
765
652
continue;
766
653
}
767
768
plugin *p = getplugin(dirst->d_name);
654
plugin *p = getplugin(dirst->d_name, &plugin_list);
769
655
if(p == NULL){
770
656
perror("getplugin");
771
657
free(filename);
781
667
}
782
668
{
783
669
/* Add global arguments to argument list for this plugin */
784
plugin *g = getplugin(NULL);
670
plugin *g = getplugin(NULL, &plugin_list);
785
671
if(g != NULL){
786
672
for(char **a = g->argv + 1; *a != NULL; a++){
787
673
if(not add_argument(p, *a)){
790
676
}
791
677
/* Add global environment variables */
792
678
for(char **e = g->environ; *e != NULL; e++){
793
if(not add_environment(p, *e, false)){
679
if(not add_environment(p, *e)){
794
680
perror("add_environment");
795
681
}
796
682
}
801
687
process, too. */
802
688
if(p->environ[0] != NULL){
803
689
for(char **e = environ; *e != NULL; e++){
804
if(not add_environment(p, *e, false)){
690
char *copy = strdup(*e);
691
if(copy == NULL){
692
perror("strdup");
693
continue;
694
}
695
if(not add_environment(p, copy)){
805
696
perror("add_environment");
806
697
}
807
698
}
814
705
exitstatus = EXIT_FAILURE;
815
706
goto fallback;
816
707
}
817
/* Ask OS to automatic close the pipe on exec */
818
708
ret = set_cloexec_flag(pipefd[0]);
819
709
if(ret < 0){
820
710
perror("set_cloexec_flag");
834
724
exitstatus = EXIT_FAILURE;
835
725
goto fallback;
836
726
}
837
/* Starting a new process to be watched */
727
// Starting a new process to be watched
838
728
pid_t pid = fork();
839
729
if(pid == -1){
840
730
perror("fork");
848
738
perror("sigaction");
849
739
_exit(EXIT_FAILURE);
850
740
}
851
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
741
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
852
742
if(ret < 0){
853
743
perror("sigprocmask");
854
744
_exit(EXIT_FAILURE);
855
745
}
856
746
857
747
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
858
748
if(ret == -1){
859
749
perror("dup2");
878
768
}
879
769
/* no return */
880
770
}
881
/* Parent process */
882
close(pipefd[1]); /* Close unused write end of pipe */
771
/* parent process */
883
772
free(filename);
884
plugin *new_plugin = getplugin(dirst->d_name);
885
if (new_plugin == NULL){
886
perror("getplugin");
773
close(pipefd[1]); /* close unused write end of pipe */
774
process *new_process = malloc(sizeof(process));
775
if (new_process == NULL){
776
perror("malloc");
887
777
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
888
778
if(ret < 0){
889
perror("sigprocmask");
779
perror("sigprocmask");
890
780
}
891
781
exitstatus = EXIT_FAILURE;
892
782
goto fallback;
893
783
}
894
784
895
new_plugin->pid = pid;
896
new_plugin->fd = pipefd[0];
897
785
*new_process = (struct process){ .pid = pid,
786
.fd = pipefd[0],
787
.next = process_list };
788
// List handling
789
process_list = new_process;
898
790
/* Unblock SIGCHLD so signal handler can be run if this process
899
791
has already completed */
900
792
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
904
796
goto fallback;
905
797
}
906
798
907
FD_SET(new_plugin->fd, &rfds_all);
799
FD_SET(new_process->fd, &rfds_all);
908
800
909
if (maxfd < new_plugin->fd){
910
maxfd = new_plugin->fd;
801
if (maxfd < new_process->fd){
802
maxfd = new_process->fd;
911
803
}
804
912
805
}
913
806
807
free_plugin_list(plugin_list);
808
plugin_list = NULL;
809
914
810
closedir(dir);
915
811
dir = NULL;
916
917
for(plugin *p = plugin_list; p != NULL; p = p->next){
918
if(p->pid != 0){
919
break;
920
}
921
if(p->next == NULL){
922
fprintf(stderr, "No plugin processes started. Incorrect plugin"
923
" directory?\n");
924
free_plugin_list();
925
}
812
813
if (process_list == NULL){
814
fprintf(stderr, "No plugin processes started. Incorrect plugin"
815
" directory?\n");
816
process_list = NULL;
926
817
}
927
928
/* Main loop while running plugins exist */
929
while(plugin_list){
818
while(process_list){
930
819
fd_set rfds = rfds_all;
931
820
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
932
821
if (select_ret == -1){
936
825
}
937
826
/* OK, now either a process completed, or something can be read
938
827
from one of them */
939
for(plugin *proc = plugin_list; proc != NULL;){
828
for(process *proc = process_list; proc ; proc = proc->next){
940
829
/* Is this process completely done? */
941
830
if(proc->eof and proc->completed){
942
831
/* Only accept the plugin output if it exited cleanly */
943
832
if(not WIFEXITED(proc->status)
944
833
or WEXITSTATUS(proc->status) != 0){
945
834
/* Bad exit by plugin */
946
947
835
if(debug){
948
836
if(WIFEXITED(proc->status)){
949
837
fprintf(stderr, "Plugin %u exited with status %d\n",
958
846
(unsigned int) (proc->pid));
959
847
}
960
848
}
961
962
849
/* Remove the plugin */
963
850
FD_CLR(proc->fd, &rfds_all);
964
965
851
/* Block signal while modifying process_list */
966
852
ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
967
853
if(ret < 0){
969
855
exitstatus = EXIT_FAILURE;
970
856
goto fallback;
971
857
}
972
973
plugin *next_plugin = proc->next;
974
free_plugin(proc);
975
proc = next_plugin;
976
858
/* Delete this process entry from the list */
859
if(process_list == proc){
860
/* First one - simple */
861
process_list = proc->next;
862
} else {
863
/* Second one or later */
864
for(process *p = process_list; p != NULL; p = p->next){
865
if(p->next == proc){
866
p->next = proc->next;
867
break;
868
}
869
}
870
}
977
871
/* We are done modifying process list, so unblock signal */
978
872
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
979
873
NULL);
980
874
if(ret < 0){
981
875
perror("sigprocmask");
982
exitstatus = EXIT_FAILURE;
983
goto fallback;
984
}
985
986
if(plugin_list == NULL){
987
break;
988
}
989
990
continue;
876
}
877
free(proc->buffer);
878
free(proc);
879
/* We deleted this process from the list, so we can't go
880
proc->next. Therefore, start over from the beginning of
881
the process list */
882
break;
991
883
}
992
993
884
/* This process exited nicely, so print its buffer */
994
885
995
886
bool bret = print_out_password(proc->buffer,
996
887
proc->buffer_length);
997
888
if(not bret){
1000
891
}
1001
892
goto fallback;
1002
893
}
1003
1004
894
/* This process has not completed. Does it have any output? */
1005
895
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1006
896
/* This process had nothing to say at this time */
1007
proc = proc->next;
1008
897
continue;
1009
898
}
1010
899
/* Before reading, make the process' data buffer large enough */
1019
908
proc->buffer_size += BUFFER_SIZE;
1020
909
}
1021
910
/* Read from the process */
1022
sret = read(proc->fd, proc->buffer + proc->buffer_length,
1023
BUFFER_SIZE);
1024
if(sret < 0){
911
ret = read(proc->fd, proc->buffer + proc->buffer_length,
912
BUFFER_SIZE);
913
if(ret < 0){
1025
914
/* Read error from this process; ignore the error */
1026
proc = proc->next;
1027
915
continue;
1028
916
}
1029
if(sret == 0){
917
if(ret == 0){
1030
918
/* got EOF */
1031
919
proc->eof = true;
1032
920
} else {
1033
proc->buffer_length += (size_t) sret;
921
proc->buffer_length += (size_t) ret;
1034
922
}
1035
923
}
1036
924
}
1038
926
1039
927
fallback:
1040
928
1041
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
929
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
1042
930
/* Fallback if all plugins failed, none are found or an error
1043
931
occured */
1044
932
bool bret;
1045
933
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1046
934
char *passwordbuffer = getpass("Password: ");
1047
size_t len = strlen(passwordbuffer);
1048
/* Strip trailing newline */
1049
if(len > 0 and passwordbuffer[len-1] == '\n'){
1050
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1051
len--;
1052
}
1053
bret = print_out_password(passwordbuffer, len);
935
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1054
936
if(not bret){
1055
937
perror("print_out_password");
1056
938
exitstatus = EXIT_FAILURE;
1063
945
perror("sigaction");
1064
946
exitstatus = EXIT_FAILURE;
1065
947
}
1066
948
1067
949
if(custom_argv != NULL){
1068
for(char **arg = custom_argv+1; *arg != NULL; arg++){
950
for(char **arg = custom_argv; *arg != NULL; arg++){
1069
951
free(*arg);
1070
952
}
1071
953
free(custom_argv);
1072
954
}
955
free_plugin_list(plugin_list);
1073
956
1074
957
if(dir != NULL){
1075
958
closedir(dir);
1076
959
}
1077
960
1078
/* Kill the processes */
1079
for(plugin *p = plugin_list; p != NULL; p = p->next){
1080
if(p->pid != 0){
1081
close(p->fd);
1082
ret = kill(p->pid, SIGTERM);
1083
if(ret == -1 and errno != ESRCH){
1084
/* Set-uid proccesses might not get closed */
1085
perror("kill");
1086
}
961
/* Free the process list and kill the processes */
962
for(process *next; process_list != NULL; process_list = next){
963
next = process_list->next;
964
close(process_list->fd);
965
ret = kill(process_list->pid, SIGTERM);
966
if(ret == -1 and errno != ESRCH){
967
/* set-uid proccesses migth not get closed */
968
perror("kill");
1087
969
}
970
free(process_list->buffer);
971
free(process_list);
1088
972
}
1089
973
1090
974
/* Wait for any remaining child processes to terminate */
1095
979
perror("wait");
1096
980
}
1097
981
1098
free_plugin_list();
1099
1100
free(plugindir);
1101
free(argfile);
1102
1103
982
return exitstatus;
1104
983
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0