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- Committer: Teddy Hogeborn
- Date: 2009-09-16 23:28:39 UTC
- Revision ID: teddy@fukt.bsnet.se-20090916232839-3o7i8qmcdcz5j1ya
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
"$syslog", thanks to Petter Reinholdtsen
<pere@hungry.com> (Debian bug #546928).
* initramfs-tools-script: Removed erroneous comment.
* plugins.d/askpass-fifo.c: Removed TEMP_FAILURE_RETRY since it is
not needed.
* plugins.d/mandos-client.c (main): Bug fix: Initialize
"old_sigterm_action".
* plugins.d/splashy.c (main): Bug fix: really check return value from
"sigaddset". Fix some warnings on
64-bit systems.
* plugins.d/usplash.c (termination_handler, main): Save received
signal and
re-raise it on
exit.
(usplash_write): Do not close FIFO, instead, take an additional file
descriptor pointer to it and open only when needed
(all callers changed). Abort immediately on EINTR.
Bug fix: Add NUL byte on single-word commands.
Ignore "interrupted_by_signal".
(makeprompt, find_usplash): New; broken out from "main()".
(find_usplash): Bug fix: close /proc/<pid>/cmdline FD on error.
(main): Reorganized to jump to a new "failure" label on any error.
Bug fix: check return values from sigaddset.
New variable "usplash_accessed" to flag if usplash(8) needs
to be killed and restarted. Removed the "an_error_occured"
variable.
"$syslog", thanks to Petter Reinholdtsen
<pere@hungry.com> (Debian bug #546928).
* initramfs-tools-script: Removed erroneous comment.
* plugins.d/askpass-fifo.c: Removed TEMP_FAILURE_RETRY since it is
not needed.
* plugins.d/mandos-client.c (main): Bug fix: Initialize
"old_sigterm_action".
* plugins.d/splashy.c (main): Bug fix: really check return value from
"sigaddset". Fix some warnings on
64-bit systems.
* plugins.d/usplash.c (termination_handler, main): Save received
signal and
re-raise it on
exit.
(usplash_write): Do not close FIFO, instead, take an additional file
descriptor pointer to it and open only when needed
(all callers changed). Abort immediately on EINTR.
Bug fix: Add NUL byte on single-word commands.
Ignore "interrupted_by_signal".
(makeprompt, find_usplash): New; broken out from "main()".
(find_usplash): Bug fix: close /proc/<pid>/cmdline FD on error.
(main): Reorganized to jump to a new "failure" label on any error.
Bug fix: check return values from sigaddset.
New variable "usplash_accessed" to flag if usplash(8) needs
to be killed and restarted. Removed the "an_error_occured"
variable.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
plugin-runner.c
1
/* -*- coding: utf-8 -*- */
1
/* -*- coding: utf-8; mode: c; mode: orgtbl -*- */
2
2
/*
3
3
* Mandos plugin runner - Run Mandos plugins
4
4
*
5
* Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
5
* Copyright © 2008,2009 Teddy Hogeborn
6
* Copyright © 2008,2009 Björn Påhlsson
6
7
*
7
8
* This program is free software: you can redistribute it and/or
8
9
* modify it under the terms of the GNU General Public License as
21
22
* Contact the authors at <mandos@fukt.bsnet.se>.
22
23
*/
23
24
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */
25
26
#include <stdio.h> /* popen(), fileno(), fprintf(),
25
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf() */
27
#include <stddef.h> /* size_t, NULL */
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
29
EXIT_SUCCESS, realloc() */
30
#include <stdbool.h> /* bool, true, false */
31
#include <stdio.h> /* perror, fileno(), fprintf(),
27
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, opendir(), stat(), struct
34
stat, waitpid(), WIFEXITED(),
35
WEXITSTATUS(), wait(), pid_t,
36
uid_t, gid_t, getuid(), getgid(),
37
dirfd() */
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
FD_SET(), FD_ISSET(), FD_CLR */
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
28
44
#include <iso646.h> /* and, or, not */
29
#include <sys/types.h> /* DIR, opendir(), stat(),
30
struct stat, waitpid(),
31
WIFEXITED(), WEXITSTATUS(),
32
wait() */
33
#include <sys/wait.h> /* wait() */
34
45
#include <dirent.h> /* DIR, struct dirent, opendir(),
35
readdir(), closedir() */
36
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
46
readdir(), closedir(), dirfd() */
37
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
38
fcntl() */
39
#include <fcntl.h> /* fcntl() */
40
#include <stddef.h> /* NULL */
41
#include <stdlib.h> /* EXIT_FAILURE */
42
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
43
FD_SET(), FD_ISSET() */
44
#include <string.h> /* strlen(), strcpy(), strcat() */
45
#include <stdbool.h> /* true */
46
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
47
WEXITSTATUS() */
48
fcntl(), setuid(), setgid(),
49
F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
52
execv(), write(), read(),
53
close() */
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
55
FD_CLOEXEC */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
48
58
#include <errno.h> /* errno */
49
#include <argp.h> /* struct argp_option,
50
struct argp_state, struct argp,
51
argp_parse() */
59
#include <argp.h> /* struct argp_option, struct
60
argp_state, struct argp,
61
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
64
#include <signal.h> /* struct sigaction, sigemptyset(),
65
sigaddset(), sigaction(),
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
69
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
52
71
53
72
#define BUFFER_SIZE 256
54
73
55
struct process;
56
57
typedef struct process{
74
#define PDIR "/lib/mandos/plugins.d"
75
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
76
77
const char *argp_program_version = "plugin-runner " VERSION;
78
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
79
80
typedef struct plugin{
81
char *name; /* can be NULL or any plugin name */
82
char **argv;
83
int argc;
84
char **environ;
85
int envc;
86
bool disabled;
87
88
/* Variables used for running processes*/
58
89
pid_t pid;
59
90
int fd;
60
91
char *buffer;
61
92
size_t buffer_size;
62
93
size_t buffer_length;
63
94
bool eof;
64
bool completed;
95
volatile sig_atomic_t completed;
65
96
int status;
66
struct process *next;
67
} process;
68
69
typedef struct plugin{
70
char *name; /* can be NULL or any plugin name */
71
char **argv;
72
int argc;
73
bool disabled;
74
97
struct plugin *next;
75
98
} plugin;
76
99
77
static plugin *getplugin(char *name, plugin **plugin_list){
78
for (plugin *p = *plugin_list; p != NULL; p = p->next){
79
if ((p->name == name)
80
or (p->name and name and (strcmp(p->name, name) == 0))){
100
static plugin *plugin_list = NULL;
101
102
/* Gets an existing plugin based on name,
103
or if none is found, creates a new one */
104
static plugin *getplugin(char *name){
105
/* Check for exiting plugin with that name */
106
for(plugin *p = plugin_list; p != NULL; p = p->next){
107
if((p->name == name)
108
or (p->name and name and (strcmp(p->name, name) == 0))){
81
109
return p;
82
110
}
83
111
}
84
112
/* Create a new plugin */
85
plugin *new_plugin = malloc(sizeof(plugin));
86
if (new_plugin == NULL){
87
perror("malloc");
88
exit(EXIT_FAILURE);
89
}
90
new_plugin->name = name;
91
new_plugin->argv = malloc(sizeof(char *) * 2);
92
if (new_plugin->argv == NULL){
93
perror("malloc");
94
exit(EXIT_FAILURE);
95
}
96
new_plugin->argv[0] = name;
113
plugin *new_plugin = NULL;
114
do {
115
new_plugin = malloc(sizeof(plugin));
116
} while(new_plugin == NULL and errno == EINTR);
117
if(new_plugin == NULL){
118
return NULL;
119
}
120
char *copy_name = NULL;
121
if(name != NULL){
122
do {
123
copy_name = strdup(name);
124
} while(copy_name == NULL and errno == EINTR);
125
if(copy_name == NULL){
126
free(new_plugin);
127
return NULL;
128
}
129
}
130
131
*new_plugin = (plugin){ .name = copy_name,
132
.argc = 1,
133
.disabled = false,
134
.next = plugin_list };
135
136
do {
137
new_plugin->argv = malloc(sizeof(char *) * 2);
138
} while(new_plugin->argv == NULL and errno == EINTR);
139
if(new_plugin->argv == NULL){
140
free(copy_name);
141
free(new_plugin);
142
return NULL;
143
}
144
new_plugin->argv[0] = copy_name;
97
145
new_plugin->argv[1] = NULL;
98
new_plugin->argc = 1;
99
new_plugin->disabled = false;
100
new_plugin->next = *plugin_list;
146
147
do {
148
new_plugin->environ = malloc(sizeof(char *));
149
} while(new_plugin->environ == NULL and errno == EINTR);
150
if(new_plugin->environ == NULL){
151
free(copy_name);
152
free(new_plugin->argv);
153
free(new_plugin);
154
return NULL;
155
}
156
new_plugin->environ[0] = NULL;
157
101
158
/* Append the new plugin to the list */
102
*plugin_list = new_plugin;
159
plugin_list = new_plugin;
103
160
return new_plugin;
104
161
}
105
162
106
static void addargument(plugin *p, char *arg){
107
p->argv[p->argc] = arg;
108
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
109
if (p->argv == NULL){
110
perror("malloc");
111
exit(EXIT_FAILURE);
112
}
113
p->argc++;
114
p->argv[p->argc] = NULL;
163
/* Helper function for add_argument and add_environment */
164
static bool add_to_char_array(const char *new, char ***array,
165
int *len){
166
/* Resize the pointed-to array to hold one more pointer */
167
do {
168
*array = realloc(*array, sizeof(char *)
169
* (size_t) ((*len) + 2));
170
} while(*array == NULL and errno == EINTR);
171
/* Malloc check */
172
if(*array == NULL){
173
return false;
174
}
175
/* Make a copy of the new string */
176
char *copy;
177
do {
178
copy = strdup(new);
179
} while(copy == NULL and errno == EINTR);
180
if(copy == NULL){
181
return false;
182
}
183
/* Insert the copy */
184
(*array)[*len] = copy;
185
(*len)++;
186
/* Add a new terminating NULL pointer to the last element */
187
(*array)[*len] = NULL;
188
return true;
189
}
190
191
/* Add to a plugin's argument vector */
192
static bool add_argument(plugin *p, const char *arg){
193
if(p == NULL){
194
return false;
195
}
196
return add_to_char_array(arg, &(p->argv), &(p->argc));
197
}
198
199
/* Add to a plugin's environment */
200
static bool add_environment(plugin *p, const char *def, bool replace){
201
if(p == NULL){
202
return false;
203
}
204
/* namelen = length of name of environment variable */
205
size_t namelen = (size_t)(strchrnul(def, '=') - def);
206
/* Search for this environment variable */
207
for(char **e = p->environ; *e != NULL; e++){
208
if(strncmp(*e, def, namelen + 1) == 0){
209
/* It already exists */
210
if(replace){
211
char *new;
212
do {
213
new = realloc(*e, strlen(def) + 1);
214
} while(new == NULL and errno == EINTR);
215
if(new == NULL){
216
return false;
217
}
218
*e = new;
219
strcpy(*e, def);
220
}
221
return true;
222
}
223
}
224
return add_to_char_array(def, &(p->environ), &(p->envc));
115
225
}
116
226
117
227
/*
118
228
* Based on the example in the GNU LibC manual chapter 13.13 "File
119
229
* Descriptor Flags".
120
* *Note File Descriptor Flags:(libc)Descriptor Flags.
230
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
121
231
*/
122
static int set_cloexec_flag(int fd)
123
{
124
int ret = fcntl(fd, F_GETFD, 0);
232
static int set_cloexec_flag(int fd){
233
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
125
234
/* If reading the flags failed, return error indication now. */
126
235
if(ret < 0){
127
236
return ret;
128
237
}
129
238
/* Store modified flag word in the descriptor. */
130
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
239
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
240
ret | FD_CLOEXEC));
131
241
}
132
242
133
const char *argp_program_version = "plugbasedclient 0.9";
134
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
136
process *process_list = NULL;
137
138
/* Mark a process as completed when it exits, and save its exit
243
244
/* Mark processes as completed when they exit, and save their exit
139
245
status. */
140
void handle_sigchld(__attribute__((unused)) int sig){
141
process *proc = process_list;
142
int status;
143
pid_t pid = wait(&status);
144
while(proc != NULL and proc->pid != pid){
145
proc = proc->next;
146
}
147
if(proc == NULL){
148
/* Process not found in process list */
149
return;
150
}
151
proc->status = status;
152
proc->completed = true;
246
static void handle_sigchld(__attribute__((unused)) int sig){
247
int old_errno = errno;
248
while(true){
249
plugin *proc = plugin_list;
250
int status;
251
pid_t pid = waitpid(-1, &status, WNOHANG);
252
if(pid == 0){
253
/* Only still running child processes */
254
break;
255
}
256
if(pid == -1){
257
if(errno == ECHILD){
258
/* No child processes */
259
break;
260
}
261
perror("waitpid");
262
}
263
264
/* A child exited, find it in process_list */
265
while(proc != NULL and proc->pid != pid){
266
proc = proc->next;
267
}
268
if(proc == NULL){
269
/* Process not found in process list */
270
continue;
271
}
272
proc->status = status;
273
proc->completed = 1;
274
}
275
errno = old_errno;
276
}
277
278
/* Prints out a password to stdout */
279
static bool print_out_password(const char *buffer, size_t length){
280
ssize_t ret;
281
for(size_t written = 0; written < length; written += (size_t)ret){
282
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
283
length - written));
284
if(ret < 0){
285
return false;
286
}
287
}
288
return true;
289
}
290
291
/* Removes and free a plugin from the plugin list */
292
static void free_plugin(plugin *plugin_node){
293
294
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
295
free(*arg);
296
}
297
free(plugin_node->argv);
298
for(char **env = plugin_node->environ; *env != NULL; env++){
299
free(*env);
300
}
301
free(plugin_node->environ);
302
free(plugin_node->buffer);
303
304
/* Removes the plugin from the singly-linked list */
305
if(plugin_node == plugin_list){
306
/* First one - simple */
307
plugin_list = plugin_list->next;
308
} else {
309
/* Second one or later */
310
for(plugin *p = plugin_list; p != NULL; p = p->next){
311
if(p->next == plugin_node){
312
p->next = plugin_node->next;
313
break;
314
}
315
}
316
}
317
318
free(plugin_node);
319
}
320
321
static void free_plugin_list(void){
322
while(plugin_list != NULL){
323
free_plugin(plugin_list);
324
}
153
325
}
154
326
155
327
int main(int argc, char *argv[]){
156
const char *plugindir = "/conf/conf.d/mandos/plugins.d";
328
char *plugindir = NULL;
329
char *argfile = NULL;
330
FILE *conffp;
157
331
size_t d_name_len;
158
332
DIR *dir = NULL;
159
333
struct dirent *dirst;
160
334
struct stat st;
161
335
fd_set rfds_all;
162
336
int ret, maxfd = 0;
337
ssize_t sret;
163
338
uid_t uid = 65534;
164
339
gid_t gid = 65534;
165
340
bool debug = false;
167
342
struct sigaction old_sigchld_action;
168
343
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
169
344
.sa_flags = SA_NOCLDSTOP };
170
char *plus_options = NULL;
171
char **plus_argv = NULL;
345
char **custom_argv = NULL;
346
int custom_argc = 0;
172
347
173
348
/* Establish a signal handler */
174
349
sigemptyset(&sigchld_action.sa_mask);
175
350
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
176
if(ret < 0){
351
if(ret == -1){
177
352
perror("sigaddset");
178
exit(EXIT_FAILURE);
353
exitstatus = EXIT_FAILURE;
354
goto fallback;
179
355
}
180
356
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
181
if(ret < 0){
357
if(ret == -1){
182
358
perror("sigaction");
183
exit(EXIT_FAILURE);
359
exitstatus = EXIT_FAILURE;
360
goto fallback;
184
361
}
185
362
186
363
/* The options we understand. */
188
365
{ .name = "global-options", .key = 'g',
189
366
.arg = "OPTION[,OPTION[,...]]",
190
367
.doc = "Options passed to all plugins" },
368
{ .name = "global-env", .key = 'G',
369
.arg = "VAR=value",
370
.doc = "Environment variable passed to all plugins" },
191
371
{ .name = "options-for", .key = 'o',
192
372
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
193
373
.doc = "Options passed only to specified plugin" },
374
{ .name = "env-for", .key = 'E',
375
.arg = "PLUGIN:ENV=value",
376
.doc = "Environment variable passed to specified plugin" },
194
377
{ .name = "disable", .key = 'd',
195
378
.arg = "PLUGIN",
196
379
.doc = "Disable a specific plugin", .group = 1 },
380
{ .name = "enable", .key = 'e',
381
.arg = "PLUGIN",
382
.doc = "Enable a specific plugin", .group = 1 },
197
383
{ .name = "plugin-dir", .key = 128,
198
384
.arg = "DIRECTORY",
199
385
.doc = "Specify a different plugin directory", .group = 2 },
200
{ .name = "userid", .key = 129,
201
.arg = "ID", .flags = 0,
202
.doc = "User ID the plugins will run as", .group = 2 },
203
{ .name = "groupid", .key = 130,
204
.arg = "ID", .flags = 0,
205
.doc = "Group ID the plugins will run as", .group = 2 },
206
{ .name = "debug", .key = 131,
207
.doc = "Debug mode", .group = 3 },
386
{ .name = "config-file", .key = 129,
387
.arg = "FILE",
388
.doc = "Specify a different configuration file", .group = 2 },
389
{ .name = "userid", .key = 130,
390
.arg = "ID", .flags = 0,
391
.doc = "User ID the plugins will run as", .group = 3 },
392
{ .name = "groupid", .key = 131,
393
.arg = "ID", .flags = 0,
394
.doc = "Group ID the plugins will run as", .group = 3 },
395
{ .name = "debug", .key = 132,
396
.doc = "Debug mode", .group = 4 },
208
397
{ .name = NULL }
209
398
};
210
399
211
error_t parse_opt (int key, char *arg, struct argp_state *state) {
212
/* Get the INPUT argument from `argp_parse', which we know is a
213
pointer to our plugin list pointer. */
214
plugin **plugins = state->input;
215
switch (key) {
216
case 'g':
217
if (arg != NULL){
218
char *p = strtok(arg, ",");
219
do{
220
addargument(getplugin(NULL, plugins), p);
221
p = strtok(NULL, ",");
222
} while (p != NULL);
223
}
224
break;
225
case 'o':
226
if (arg != NULL){
227
char *name = strtok(arg, ":");
228
char *p = strtok(NULL, ":");
229
if(p != NULL){
230
p = strtok(p, ",");
231
do{
232
addargument(getplugin(name, plugins), p);
233
p = strtok(NULL, ",");
234
} while (p != NULL);
235
}
236
}
237
break;
238
case 'd':
239
if (arg != NULL){
240
getplugin(arg, plugins)->disabled = true;
241
}
242
break;
243
case 128:
244
plugindir = arg;
245
break;
246
case 129:
247
uid = (uid_t)strtol(arg, NULL, 10);
248
break;
249
case 130:
250
gid = (gid_t)strtol(arg, NULL, 10);
251
break;
252
case 131:
400
error_t parse_opt(int key, char *arg, __attribute__((unused))
401
struct argp_state *state){
402
switch(key){
403
char *tmp;
404
intmax_t tmpmax;
405
case 'g': /* --global-options */
406
if(arg != NULL){
407
char *plugin_option;
408
while((plugin_option = strsep(&arg, ",")) != NULL){
409
if(plugin_option[0] == '\0'){
410
continue;
411
}
412
if(not add_argument(getplugin(NULL), plugin_option)){
413
perror("add_argument");
414
return ARGP_ERR_UNKNOWN;
415
}
416
}
417
}
418
break;
419
case 'G': /* --global-env */
420
if(arg == NULL){
421
break;
422
}
423
if(not add_environment(getplugin(NULL), arg, true)){
424
perror("add_environment");
425
}
426
break;
427
case 'o': /* --options-for */
428
if(arg != NULL){
429
char *plugin_name = strsep(&arg, ":");
430
if(plugin_name[0] == '\0'){
431
break;
432
}
433
char *plugin_option;
434
while((plugin_option = strsep(&arg, ",")) != NULL){
435
if(not add_argument(getplugin(plugin_name), plugin_option)){
436
perror("add_argument");
437
return ARGP_ERR_UNKNOWN;
438
}
439
}
440
}
441
break;
442
case 'E': /* --env-for */
443
if(arg == NULL){
444
break;
445
}
446
{
447
char *envdef = strchr(arg, ':');
448
if(envdef == NULL){
449
break;
450
}
451
*envdef = '\0';
452
if(not add_environment(getplugin(arg), envdef+1, true)){
453
perror("add_environment");
454
}
455
}
456
break;
457
case 'd': /* --disable */
458
if(arg != NULL){
459
plugin *p = getplugin(arg);
460
if(p == NULL){
461
return ARGP_ERR_UNKNOWN;
462
}
463
p->disabled = true;
464
}
465
break;
466
case 'e': /* --enable */
467
if(arg != NULL){
468
plugin *p = getplugin(arg);
469
if(p == NULL){
470
return ARGP_ERR_UNKNOWN;
471
}
472
p->disabled = false;
473
}
474
break;
475
case 128: /* --plugin-dir */
476
free(plugindir);
477
plugindir = strdup(arg);
478
if(plugindir == NULL){
479
perror("strdup");
480
}
481
break;
482
case 129: /* --config-file */
483
/* This is already done by parse_opt_config_file() */
484
break;
485
case 130: /* --userid */
486
errno = 0;
487
tmpmax = strtoimax(arg, &tmp, 10);
488
if(errno != 0 or tmp == arg or *tmp != '\0'
489
or tmpmax != (uid_t)tmpmax){
490
fprintf(stderr, "Bad user ID number: \"%s\", using %"
491
PRIdMAX "\n", arg, (intmax_t)uid);
492
} else {
493
uid = (uid_t)tmpmax;
494
}
495
break;
496
case 131: /* --groupid */
497
errno = 0;
498
tmpmax = strtoimax(arg, &tmp, 10);
499
if(errno != 0 or tmp == arg or *tmp != '\0'
500
or tmpmax != (gid_t)tmpmax){
501
fprintf(stderr, "Bad group ID number: \"%s\", using %"
502
PRIdMAX "\n", arg, (intmax_t)gid);
503
} else {
504
gid = (gid_t)tmpmax;
505
}
506
break;
507
case 132: /* --debug */
253
508
debug = true;
254
509
break;
255
case ARGP_KEY_ARG:
256
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
257
argp_usage (state);
258
}
259
plus_options = arg;
260
break;
261
case ARGP_KEY_END:
262
break;
263
default:
264
return ARGP_ERR_UNKNOWN;
265
}
266
return 0;
267
}
268
269
plugin *plugin_list = NULL;
270
271
struct argp argp = { .options = options, .parser = parse_opt,
272
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
510
/*
511
* When adding more options before this line, remember to also add a
512
* "case" to the "parse_opt_config_file" function below.
513
*/
514
case ARGP_KEY_ARG:
515
/* Cryptsetup always passes an argument, which is an empty
516
string if "none" was specified in /etc/crypttab. So if
517
argument was empty, we ignore it silently. */
518
if(arg[0] != '\0'){
519
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
520
}
521
break;
522
case ARGP_KEY_END:
523
break;
524
default:
525
return ARGP_ERR_UNKNOWN;
526
}
527
return 0;
528
}
529
530
/* This option parser is the same as parse_opt() above, except it
531
ignores everything but the --config-file option. */
532
error_t parse_opt_config_file(int key, char *arg,
533
__attribute__((unused))
534
struct argp_state *state){
535
switch(key){
536
case 'g': /* --global-options */
537
case 'G': /* --global-env */
538
case 'o': /* --options-for */
539
case 'E': /* --env-for */
540
case 'd': /* --disable */
541
case 'e': /* --enable */
542
case 128: /* --plugin-dir */
543
break;
544
case 129: /* --config-file */
545
free(argfile);
546
argfile = strdup(arg);
547
if(argfile == NULL){
548
perror("strdup");
549
}
550
break;
551
case 130: /* --userid */
552
case 131: /* --groupid */
553
case 132: /* --debug */
554
case ARGP_KEY_ARG:
555
case ARGP_KEY_END:
556
break;
557
default:
558
return ARGP_ERR_UNKNOWN;
559
}
560
return 0;
561
}
562
563
struct argp argp = { .options = options,
564
.parser = parse_opt_config_file,
565
.args_doc = "",
273
566
.doc = "Mandos plugin runner -- Run plugins" };
274
567
275
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
276
277
if(plus_options){
278
/* This is a mangled argument in the form of
279
"+--option+--other-option=parameter+--yet-another-option", etc */
280
/* Make new argc and argv vars, and call argp_parse() again. */
281
plus_options++; /* skip the first '+' character */
282
const char delims[] = "+";
283
char *arg;
284
int new_argc = 1;
285
plus_argv = malloc(sizeof(char*) * 2);
286
if(plus_argv == NULL){
568
/* Parse using parse_opt_config_file() in order to get the custom
569
config file location, if any. */
570
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
571
if(ret == ARGP_ERR_UNKNOWN){
572
fprintf(stderr, "Unknown error while parsing arguments\n");
573
exitstatus = EXIT_FAILURE;
574
goto fallback;
575
}
576
577
/* Reset to the normal argument parser */
578
argp.parser = parse_opt;
579
580
/* Open the configfile if available */
581
if(argfile == NULL){
582
conffp = fopen(AFILE, "r");
583
} else {
584
conffp = fopen(argfile, "r");
585
}
586
if(conffp != NULL){
587
char *org_line = NULL;
588
char *p, *arg, *new_arg, *line;
589
size_t size = 0;
590
const char whitespace_delims[] = " \r\t\f\v\n";
591
const char comment_delim[] = "#";
592
593
custom_argc = 1;
594
custom_argv = malloc(sizeof(char*) * 2);
595
if(custom_argv == NULL){
287
596
perror("malloc");
288
597
exitstatus = EXIT_FAILURE;
289
goto end;
290
}
291
plus_argv[0] = argv[0];
292
plus_argv[1] = NULL;
293
arg = strtok(plus_options, delims); /* Get first argument */
294
while(arg != NULL){
295
new_argc++;
296
plus_argv = realloc(plus_argv, sizeof(char *)
297
* ((unsigned int) new_argc + 1));
298
if(plus_argv == NULL){
299
perror("malloc");
300
exitstatus = EXIT_FAILURE;
301
goto end;
302
}
303
plus_argv[new_argc-1] = arg;
304
plus_argv[new_argc] = NULL;
305
arg = strtok(NULL, delims); /* Get next argument */
306
}
307
argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
598
goto fallback;
599
}
600
custom_argv[0] = argv[0];
601
custom_argv[1] = NULL;
602
603
/* for each line in the config file, strip whitespace and ignore
604
commented text */
605
while(true){
606
sret = getline(&org_line, &size, conffp);
607
if(sret == -1){
608
break;
609
}
610
611
line = org_line;
612
arg = strsep(&line, comment_delim);
613
while((p = strsep(&arg, whitespace_delims)) != NULL){
614
if(p[0] == '\0'){
615
continue;
616
}
617
new_arg = strdup(p);
618
if(new_arg == NULL){
619
perror("strdup");
620
exitstatus = EXIT_FAILURE;
621
free(org_line);
622
goto fallback;
623
}
624
625
custom_argc += 1;
626
custom_argv = realloc(custom_argv, sizeof(char *)
627
* ((unsigned int) custom_argc + 1));
628
if(custom_argv == NULL){
629
perror("realloc");
630
exitstatus = EXIT_FAILURE;
631
free(org_line);
632
goto fallback;
633
}
634
custom_argv[custom_argc-1] = new_arg;
635
custom_argv[custom_argc] = NULL;
636
}
637
}
638
do {
639
ret = fclose(conffp);
640
} while(ret == EOF and errno == EINTR);
641
if(ret == EOF){
642
perror("fclose");
643
exitstatus = EXIT_FAILURE;
644
goto fallback;
645
}
646
free(org_line);
647
} else {
648
/* Check for harmful errors and go to fallback. Other errors might
649
not affect opening plugins */
650
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
651
perror("fopen");
652
exitstatus = EXIT_FAILURE;
653
goto fallback;
654
}
655
}
656
/* If there was any arguments from configuration file,
657
pass them to parser as command arguments */
658
if(custom_argv != NULL){
659
ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
660
0, NULL);
661
if(ret == ARGP_ERR_UNKNOWN){
662
fprintf(stderr, "Unknown error while parsing arguments\n");
663
exitstatus = EXIT_FAILURE;
664
goto fallback;
665
}
666
}
667
668
/* Parse actual command line arguments, to let them override the
669
config file */
670
ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
671
if(ret == ARGP_ERR_UNKNOWN){
672
fprintf(stderr, "Unknown error while parsing arguments\n");
673
exitstatus = EXIT_FAILURE;
674
goto fallback;
308
675
}
309
676
310
677
if(debug){
314
681
for(char **a = p->argv; *a != NULL; a++){
315
682
fprintf(stderr, "\tArg: %s\n", *a);
316
683
}
684
fprintf(stderr, "...and %d environment variables\n", p->envc);
685
for(char **a = p->environ; *a != NULL; a++){
686
fprintf(stderr, "\t%s\n", *a);
687
}
317
688
}
318
689
}
319
690
691
/* Strip permissions down to nobody */
692
setgid(gid);
693
if(ret == -1){
694
perror("setgid");
695
}
320
696
ret = setuid(uid);
321
if (ret == -1){
697
if(ret == -1){
322
698
perror("setuid");
323
699
}
324
700
325
setgid(gid);
326
if (ret == -1){
327
perror("setgid");
701
if(plugindir == NULL){
702
dir = opendir(PDIR);
703
} else {
704
dir = opendir(plugindir);
328
705
}
329
706
330
dir = opendir(plugindir);
331
707
if(dir == NULL){
332
708
perror("Could not open plugin dir");
333
709
exitstatus = EXIT_FAILURE;
334
goto end;
710
goto fallback;
335
711
}
336
712
337
713
/* Set the FD_CLOEXEC flag on the directory, if possible */
342
718
if(ret < 0){
343
719
perror("set_cloexec_flag");
344
720
exitstatus = EXIT_FAILURE;
345
goto end;
721
goto fallback;
346
722
}
347
723
}
348
724
}
349
725
350
726
FD_ZERO(&rfds_all);
351
727
728
/* Read and execute any executable in the plugin directory*/
352
729
while(true){
353
dirst = readdir(dir);
730
do {
731
dirst = readdir(dir);
732
} while(dirst == NULL and errno == EINTR);
354
733
355
// All directory entries have been processed
734
/* All directory entries have been processed */
356
735
if(dirst == NULL){
736
if(errno == EBADF){
737
perror("readdir");
738
exitstatus = EXIT_FAILURE;
739
goto fallback;
740
}
357
741
break;
358
742
}
359
743
360
744
d_name_len = strlen(dirst->d_name);
361
745
362
// Ignore dotfiles, backup files and other junk
746
/* Ignore dotfiles, backup files and other junk */
363
747
{
364
748
bool bad_name = false;
365
749
367
751
368
752
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
369
753
".dpkg-old",
754
".dpkg-bak",
370
755
".dpkg-divert", NULL };
371
756
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
372
757
size_t pre_len = strlen(*pre);
380
765
break;
381
766
}
382
767
}
383
384
768
if(bad_name){
385
769
continue;
386
770
}
387
388
771
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
389
772
size_t suf_len = strlen(*suf);
390
773
if((d_name_len >= suf_len)
404
787
}
405
788
}
406
789
407
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
408
if (filename == NULL){
409
perror("malloc");
410
exitstatus = EXIT_FAILURE;
411
goto end;
412
}
413
strcpy(filename, plugindir); /* Spurious warning */
414
strcat(filename, "/"); /* Spurious warning */
415
strcat(filename, dirst->d_name); /* Spurious warning */
416
417
stat(filename, &st);
418
419
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
790
char *filename;
791
if(plugindir == NULL){
792
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
793
dirst->d_name));
794
} else {
795
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
796
plugindir,
797
dirst->d_name));
798
}
799
if(ret < 0){
800
perror("asprintf");
801
continue;
802
}
803
804
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
805
if(ret == -1){
806
perror("stat");
807
free(filename);
808
continue;
809
}
810
811
/* Ignore non-executable files */
812
if(not S_ISREG(st.st_mode)
813
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
420
814
if(debug){
421
815
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
422
816
" with bad type or mode\n", filename);
424
818
free(filename);
425
819
continue;
426
820
}
427
if(getplugin(dirst->d_name, &plugin_list)->disabled){
821
822
plugin *p = getplugin(dirst->d_name);
823
if(p == NULL){
824
perror("getplugin");
825
free(filename);
826
continue;
827
}
828
if(p->disabled){
428
829
if(debug){
429
830
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
430
831
dirst->d_name);
432
833
free(filename);
433
834
continue;
434
835
}
435
plugin *p = getplugin(dirst->d_name, &plugin_list);
436
836
{
437
837
/* Add global arguments to argument list for this plugin */
438
plugin *g = getplugin(NULL, &plugin_list);
439
for(char **a = g->argv + 1; *a != NULL; a++){
440
addargument(p, *a);
441
}
442
}
443
int pipefd[2];
444
ret = pipe(pipefd);
445
if (ret == -1){
838
plugin *g = getplugin(NULL);
839
if(g != NULL){
840
for(char **a = g->argv + 1; *a != NULL; a++){
841
if(not add_argument(p, *a)){
842
perror("add_argument");
843
}
844
}
845
/* Add global environment variables */
846
for(char **e = g->environ; *e != NULL; e++){
847
if(not add_environment(p, *e, false)){
848
perror("add_environment");
849
}
850
}
851
}
852
}
853
/* If this plugin has any environment variables, we will call
854
using execve and need to duplicate the environment from this
855
process, too. */
856
if(p->environ[0] != NULL){
857
for(char **e = environ; *e != NULL; e++){
858
if(not add_environment(p, *e, false)){
859
perror("add_environment");
860
}
861
}
862
}
863
864
int pipefd[2];
865
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
866
if(ret == -1){
446
867
perror("pipe");
447
868
exitstatus = EXIT_FAILURE;
448
goto end;
869
goto fallback;
449
870
}
871
/* Ask OS to automatic close the pipe on exec */
450
872
ret = set_cloexec_flag(pipefd[0]);
451
873
if(ret < 0){
452
874
perror("set_cloexec_flag");
453
875
exitstatus = EXIT_FAILURE;
454
goto end;
876
goto fallback;
455
877
}
456
878
ret = set_cloexec_flag(pipefd[1]);
457
879
if(ret < 0){
458
880
perror("set_cloexec_flag");
459
881
exitstatus = EXIT_FAILURE;
460
goto end;
882
goto fallback;
461
883
}
462
884
/* Block SIGCHLD until process is safely in process list */
463
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
885
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
886
&sigchld_action.sa_mask,
887
NULL));
464
888
if(ret < 0){
465
889
perror("sigprocmask");
466
890
exitstatus = EXIT_FAILURE;
467
goto end;
468
}
469
// Starting a new process to be watched
470
pid_t pid = fork();
891
goto fallback;
892
}
893
/* Starting a new process to be watched */
894
pid_t pid;
895
do {
896
pid = fork();
897
} while(pid == -1 and errno == EINTR);
898
if(pid == -1){
899
perror("fork");
900
exitstatus = EXIT_FAILURE;
901
goto fallback;
902
}
471
903
if(pid == 0){
472
904
/* this is the child process */
473
905
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
475
907
perror("sigaction");
476
908
_exit(EXIT_FAILURE);
477
909
}
478
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
910
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
479
911
if(ret < 0){
480
912
perror("sigprocmask");
481
913
_exit(EXIT_FAILURE);
482
914
}
483
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
915
916
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
917
if(ret == -1){
918
perror("dup2");
919
_exit(EXIT_FAILURE);
920
}
484
921
485
922
if(dirfd(dir) < 0){
486
923
/* If dir has no file descriptor, we could not set FD_CLOEXEC
487
924
above and must now close it manually here. */
488
925
closedir(dir);
489
926
}
490
if(execv(filename, p->argv) < 0){
491
perror("execv");
492
_exit(EXIT_FAILURE);
927
if(p->environ[0] == NULL){
928
if(execv(filename, p->argv) < 0){
929
perror("execv");
930
_exit(EXIT_FAILURE);
931
}
932
} else {
933
if(execve(filename, p->argv, p->environ) < 0){
934
perror("execve");
935
_exit(EXIT_FAILURE);
936
}
493
937
}
494
938
/* no return */
495
939
}
496
/* parent process */
940
/* Parent process */
941
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
942
pipe */
497
943
free(filename);
498
close(pipefd[1]); /* close unused write end of pipe */
499
process *new_process = malloc(sizeof(process));
500
if (new_process == NULL){
501
perror("malloc");
502
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
944
plugin *new_plugin = getplugin(dirst->d_name);
945
if(new_plugin == NULL){
946
perror("getplugin");
947
ret = (int)(TEMP_FAILURE_RETRY
948
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
949
NULL)));
503
950
if(ret < 0){
504
perror("sigprocmask");
951
perror("sigprocmask");
505
952
}
506
953
exitstatus = EXIT_FAILURE;
507
goto end;
954
goto fallback;
508
955
}
509
956
510
*new_process = (struct process){ .pid = pid,
511
.fd = pipefd[0],
512
.next = process_list };
513
// List handling
514
process_list = new_process;
957
new_plugin->pid = pid;
958
new_plugin->fd = pipefd[0];
959
515
960
/* Unblock SIGCHLD so signal handler can be run if this process
516
961
has already completed */
517
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
962
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
963
&sigchld_action.sa_mask,
964
NULL));
518
965
if(ret < 0){
519
966
perror("sigprocmask");
520
967
exitstatus = EXIT_FAILURE;
521
goto end;
522
}
523
524
FD_SET(new_process->fd, &rfds_all);
525
526
if (maxfd < new_process->fd){
527
maxfd = new_process->fd;
528
}
529
530
}
531
532
/* Free the plugin list */
533
for(plugin *next; plugin_list != NULL; plugin_list = next){
534
next = plugin_list->next;
535
free(plugin_list->argv);
536
free(plugin_list);
537
}
538
539
closedir(dir);
968
goto fallback;
969
}
970
971
FD_SET(new_plugin->fd, &rfds_all);
972
973
if(maxfd < new_plugin->fd){
974
maxfd = new_plugin->fd;
975
}
976
}
977
978
TEMP_FAILURE_RETRY(closedir(dir));
540
979
dir = NULL;
980
free_plugin(getplugin(NULL));
541
981
542
if (process_list == NULL){
543
fprintf(stderr, "No plugin processes started, exiting\n");
544
exitstatus = EXIT_FAILURE;
545
goto end;
982
for(plugin *p = plugin_list; p != NULL; p = p->next){
983
if(p->pid != 0){
984
break;
985
}
986
if(p->next == NULL){
987
fprintf(stderr, "No plugin processes started. Incorrect plugin"
988
" directory?\n");
989
free_plugin_list();
990
}
546
991
}
547
while(process_list){
992
993
/* Main loop while running plugins exist */
994
while(plugin_list){
548
995
fd_set rfds = rfds_all;
549
996
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
550
if (select_ret == -1){
997
if(select_ret == -1 and errno != EINTR){
551
998
perror("select");
552
999
exitstatus = EXIT_FAILURE;
553
goto end;
1000
goto fallback;
554
1001
}
555
1002
/* OK, now either a process completed, or something can be read
556
1003
from one of them */
557
for(process *proc = process_list; proc ; proc = proc->next){
1004
for(plugin *proc = plugin_list; proc != NULL;){
558
1005
/* Is this process completely done? */
559
if(proc->eof and proc->completed){
1006
if(proc->completed and proc->eof){
560
1007
/* Only accept the plugin output if it exited cleanly */
561
1008
if(not WIFEXITED(proc->status)
562
1009
or WEXITSTATUS(proc->status) != 0){
563
1010
/* Bad exit by plugin */
1011
564
1012
if(debug){
565
1013
if(WIFEXITED(proc->status)){
566
fprintf(stderr, "Plugin %d exited with status %d\n",
567
proc->pid, WEXITSTATUS(proc->status));
568
} else if(WIFSIGNALED(proc->status)) {
569
fprintf(stderr, "Plugin %d killed by signal %d\n",
570
proc->pid, WTERMSIG(proc->status));
1014
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1015
" status %d\n", proc->name,
1016
(intmax_t) (proc->pid),
1017
WEXITSTATUS(proc->status));
1018
} else if(WIFSIGNALED(proc->status)){
1019
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1020
" signal %d: %s\n", proc->name,
1021
(intmax_t) (proc->pid),
1022
WTERMSIG(proc->status),
1023
strsignal(WTERMSIG(proc->status)));
571
1024
} else if(WCOREDUMP(proc->status)){
572
fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
1025
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1026
" core\n", proc->name, (intmax_t) (proc->pid));
573
1027
}
574
1028
}
1029
575
1030
/* Remove the plugin */
576
1031
FD_CLR(proc->fd, &rfds_all);
1032
577
1033
/* Block signal while modifying process_list */
578
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1035
(SIG_BLOCK,
1036
&sigchld_action.sa_mask,
1037
NULL));
579
1038
if(ret < 0){
580
1039
perror("sigprocmask");
581
1040
exitstatus = EXIT_FAILURE;
582
goto end;
583
}
584
/* Delete this process entry from the list */
585
if(process_list == proc){
586
/* First one - simple */
587
process_list = proc->next;
588
} else {
589
/* Second one or later */
590
for(process *p = process_list; p != NULL; p = p->next){
591
if(p->next == proc){
592
p->next = proc->next;
593
break;
594
}
595
}
596
}
1041
goto fallback;
1042
}
1043
1044
plugin *next_plugin = proc->next;
1045
free_plugin(proc);
1046
proc = next_plugin;
1047
597
1048
/* We are done modifying process list, so unblock signal */
598
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
599
NULL);
1049
ret = (int)(TEMP_FAILURE_RETRY
1050
(sigprocmask(SIG_UNBLOCK,
1051
&sigchld_action.sa_mask, NULL)));
600
1052
if(ret < 0){
601
1053
perror("sigprocmask");
602
}
603
free(proc->buffer);
604
free(proc);
605
/* We deleted this process from the list, so we can't go
606
proc->next. Therefore, start over from the beginning of
607
the process list */
608
break;
1054
exitstatus = EXIT_FAILURE;
1055
goto fallback;
1056
}
1057
1058
if(plugin_list == NULL){
1059
break;
1060
}
1061
1062
continue;
609
1063
}
1064
610
1065
/* This process exited nicely, so print its buffer */
611
for(size_t written = 0; written < proc->buffer_length;
612
written += (size_t)ret){
613
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
614
proc->buffer + written,
615
proc->buffer_length
616
- written));
617
if(ret < 0){
618
perror("write");
619
exitstatus = EXIT_FAILURE;
620
goto end;
621
}
1066
1067
bool bret = print_out_password(proc->buffer,
1068
proc->buffer_length);
1069
if(not bret){
1070
perror("print_out_password");
1071
exitstatus = EXIT_FAILURE;
622
1072
}
623
goto end;
1073
goto fallback;
624
1074
}
1075
625
1076
/* This process has not completed. Does it have any output? */
626
1077
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
627
1078
/* This process had nothing to say at this time */
1079
proc = proc->next;
628
1080
continue;
629
1081
}
630
1082
/* Before reading, make the process' data buffer large enough */
631
1083
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
632
1084
proc->buffer = realloc(proc->buffer, proc->buffer_size
633
1085
+ (size_t) BUFFER_SIZE);
634
if (proc->buffer == NULL){
1086
if(proc->buffer == NULL){
635
1087
perror("malloc");
636
1088
exitstatus = EXIT_FAILURE;
637
goto end;
1089
goto fallback;
638
1090
}
639
1091
proc->buffer_size += BUFFER_SIZE;
640
1092
}
641
1093
/* Read from the process */
642
ret = read(proc->fd, proc->buffer + proc->buffer_length,
643
BUFFER_SIZE);
644
if(ret < 0){
1094
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1095
proc->buffer
1096
+ proc->buffer_length,
1097
BUFFER_SIZE));
1098
if(sret < 0){
645
1099
/* Read error from this process; ignore the error */
1100
proc = proc->next;
646
1101
continue;
647
1102
}
648
if(ret == 0){
1103
if(sret == 0){
649
1104
/* got EOF */
650
1105
proc->eof = true;
651
1106
} else {
652
proc->buffer_length += (size_t) ret;
1107
proc->buffer_length += (size_t) sret;
653
1108
}
654
1109
}
655
1110
}
656
if(process_list == NULL){
657
fprintf(stderr, "All plugin processes failed, exiting\n");
658
exitstatus = EXIT_FAILURE;
1111
1112
1113
fallback:
1114
1115
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1116
/* Fallback if all plugins failed, none are found or an error
1117
occured */
1118
bool bret;
1119
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1120
char *passwordbuffer = getpass("Password: ");
1121
size_t len = strlen(passwordbuffer);
1122
/* Strip trailing newline */
1123
if(len > 0 and passwordbuffer[len-1] == '\n'){
1124
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1125
len--;
1126
}
1127
bret = print_out_password(passwordbuffer, len);
1128
if(not bret){
1129
perror("print_out_password");
1130
exitstatus = EXIT_FAILURE;
1131
}
659
1132
}
660
1133
661
end:
662
1134
/* Restore old signal handler */
663
sigaction(SIGCHLD, &old_sigchld_action, NULL);
664
665
free(plus_argv);
666
667
/* Free the plugin list */
668
for(plugin *next; plugin_list != NULL; plugin_list = next){
669
next = plugin_list->next;
670
free(plugin_list->argv);
671
free(plugin_list);
1135
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1136
if(ret == -1){
1137
perror("sigaction");
1138
exitstatus = EXIT_FAILURE;
1139
}
1140
1141
if(custom_argv != NULL){
1142
for(char **arg = custom_argv+1; *arg != NULL; arg++){
1143
free(*arg);
1144
}
1145
free(custom_argv);
672
1146
}
673
1147
674
1148
if(dir != NULL){
675
1149
closedir(dir);
676
1150
}
677
1151
678
/* Free the process list and kill the processes */
679
for(process *next; process_list != NULL; process_list = next){
680
next = process_list->next;
681
close(process_list->fd);
682
kill(process_list->pid, SIGTERM);
683
free(process_list->buffer);
684
free(process_list);
1152
/* Kill the processes */
1153
for(plugin *p = plugin_list; p != NULL; p = p->next){
1154
if(p->pid != 0){
1155
close(p->fd);
1156
ret = kill(p->pid, SIGTERM);
1157
if(ret == -1 and errno != ESRCH){
1158
/* Set-uid proccesses might not get closed */
1159
perror("kill");
1160
}
1161
}
685
1162
}
686
1163
687
1164
/* Wait for any remaining child processes to terminate */
688
do{
1165
do {
689
1166
ret = wait(NULL);
690
1167
} while(ret >= 0);
691
1168
if(errno != ECHILD){
692
1169
perror("wait");
693
1170
}
694
1171
1172
free_plugin_list();
1173
1174
free(plugindir);
1175
free(argfile);
1176
695
1177
return exitstatus;
696
1178
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0