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- Committer: Teddy Hogeborn
- Date: 2009-10-24 19:17:52 UTC
- mto: (24.1.146 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-20091024191752-7g6xlf6wpp2pdexb
Convert some programs to use the exit codes from <sysexits.h>. Change
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
all programs using the "argp" parsing functions to use them correctly;
checking return value, using argp_error() to report parse errors etc.
* plugin-runner.c: Use <sysexits.h> exit codes. Always use fallback,
even on option errors, except for "--help", etc.
(getplugin): Make sure "errno" is set correctly on return.
(main): Declare our own "--help", "--usage", and "--version"
options which do not cause the fallback to be invoked.
In all other options, use fallback on any error.
(parse_opt, parse_opt_config_file): Reset errno at start and return
errno. No need to check "arg"
for NULL. New "--help",
"--usage", and "--version"
options.
(parse_opt): Accept empty string as global option. Do not print
errors which will be detected and reported later. Do
"argp_error()" on parse error or empty plugin names.
* plugins.d/mandos-client.c: Use <sysexits.h> exit codes. Do not
return successful exit code on "--help",
etc. since this would give the wrong
message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version"
options which do not return a successful exit code.
(parse_opt): Reset errno at start and return errno. Do
"argp_error()" on parse errors. New "--help",
"--usage", and "--version" options.
* plugins.d/password-prompt.c: Use exit codes from <sysexits.h>. Do
not return successful exit code on
"--help", etc. since this would give
the wrong message to "plugin-runner".
(main): Declare our own "--help", "--usage", and "--version" options
which do not return a successful exit code. Do
close(STDOUT_FILENO) after writing to check its return code.
(parse_opt): Reset errno at start and return errno.
- 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:
- 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
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
28
#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
28
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EXIT_SUCCESS, realloc() */
29
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#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> /* perror, fileno(), fprintf(),
32
stderr, STDOUT_FILENO */
33
#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
33
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stat, waitpid(), WIFEXITED(),
34
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WEXITSTATUS(), wait(), pid_t,
35
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uid_t, gid_t, getuid(), getgid(),
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#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
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FD_SET(), FD_ISSET(), FD_CLR */
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#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
40
WEXITSTATUS() */
41
WEXITSTATUS(), WTERMSIG(),
42
WCOREDUMP() */
41
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#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
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#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
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readdir(), closedir(), dirfd() */
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#include <unistd.h> /* struct stat, stat(), S_ISREG(),
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fcntl(), setuid(), setgid(),
47
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F_GETFD, F_SETFD, FD_CLOEXEC,
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access(), pipe(), fork(), close()
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dup2, STDOUT_FILENO, _exit(),
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dup2(), STDOUT_FILENO, _exit(),
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execv(), write(), read(),
51
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close() */
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#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
53
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FD_CLOEXEC */
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal() */
55
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#include <errno.h> /* errno */
56
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#include <argp.h> /* struct argp_option, struct
57
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argp_state, struct argp,
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argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
63
error_t */
60
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#include <signal.h> /* struct sigaction, sigemptyset(),
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sigaddset(), sigaction(),
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sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
68
*/
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#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
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#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
68
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const char *argp_program_version = "plugin-runner 1.0";
74
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#define PDIR "/lib/mandos/plugins.d"
76
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
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const char *argp_program_version = "plugin-runner " VERSION;
70
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const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
71
80
72
struct process;
73
74
typedef struct process{
75
pid_t pid;
76
int fd;
77
char *buffer;
78
size_t buffer_size;
79
size_t buffer_length;
80
bool eof;
81
bool completed;
82
int status;
83
struct process *next;
84
} process;
85
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typedef struct plugin{
87
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char *name; /* can be NULL or any plugin name */
88
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char **argv;
90
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char **environ;
91
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int envc;
92
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bool disabled;
88
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/* Variables used for running processes*/
90
pid_t pid;
91
int fd;
92
char *buffer;
93
size_t buffer_size;
94
size_t buffer_length;
95
bool eof;
96
volatile sig_atomic_t completed;
97
int status;
93
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struct plugin *next;
94
99
} plugin;
95
100
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static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
98
if ((p->name == name)
99
or (p->name and name and (strcmp(p->name, name) == 0))){
101
static plugin *plugin_list = NULL;
102
103
/* Gets an existing plugin based on name,
104
or if none is found, creates a new one */
105
static plugin *getplugin(char *name){
106
/* Check for existing plugin with that name */
107
for(plugin *p = plugin_list; p != NULL; p = p->next){
108
if((p->name == name)
109
or (p->name and name and (strcmp(p->name, name) == 0))){
100
110
return p;
101
111
}
102
112
}
103
113
/* Create a new plugin */
104
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
114
plugin *new_plugin = NULL;
115
do {
116
new_plugin = malloc(sizeof(plugin));
117
} while(new_plugin == NULL and errno == EINTR);
118
if(new_plugin == NULL){
106
119
return NULL;
107
120
}
108
121
char *copy_name = NULL;
109
122
if(name != NULL){
110
copy_name = strdup(name);
123
do {
124
copy_name = strdup(name);
125
} while(copy_name == NULL and errno == EINTR);
111
126
if(copy_name == NULL){
127
int e = errno;
128
free(new_plugin);
129
errno = e;
112
130
return NULL;
113
131
}
114
132
}
115
133
116
*new_plugin = (plugin) { .name = copy_name,
117
.argc = 1,
118
.envc = 0,
119
.disabled = false,
120
.next = *plugin_list };
134
*new_plugin = (plugin){ .name = copy_name,
135
.argc = 1,
136
.disabled = false,
137
.next = plugin_list };
121
138
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new_plugin->argv = malloc(sizeof(char *) * 2);
123
if (new_plugin->argv == NULL){
139
do {
140
new_plugin->argv = malloc(sizeof(char *) * 2);
141
} while(new_plugin->argv == NULL and errno == EINTR);
142
if(new_plugin->argv == NULL){
143
int e = errno;
124
144
free(copy_name);
125
145
free(new_plugin);
146
errno = e;
126
147
return NULL;
127
148
}
128
149
new_plugin->argv[0] = copy_name;
129
150
new_plugin->argv[1] = NULL;
130
131
new_plugin->environ = malloc(sizeof(char *));
151
152
do {
153
new_plugin->environ = malloc(sizeof(char *));
154
} while(new_plugin->environ == NULL and errno == EINTR);
132
155
if(new_plugin->environ == NULL){
156
int e = errno;
133
157
free(copy_name);
134
158
free(new_plugin->argv);
135
159
free(new_plugin);
160
errno = e;
136
161
return NULL;
137
162
}
138
163
new_plugin->environ[0] = NULL;
164
139
165
/* Append the new plugin to the list */
140
*plugin_list = new_plugin;
166
plugin_list = new_plugin;
141
167
return new_plugin;
142
168
}
143
169
145
171
static bool add_to_char_array(const char *new, char ***array,
146
172
int *len){
147
173
/* Resize the pointed-to array to hold one more pointer */
148
*array = realloc(*array, sizeof(char *)
149
* (size_t) ((*len) + 2));
174
do {
175
*array = realloc(*array, sizeof(char *)
176
* (size_t) ((*len) + 2));
177
} while(*array == NULL and errno == EINTR);
150
178
/* Malloc check */
151
179
if(*array == NULL){
152
180
return false;
153
181
}
154
182
/* Make a copy of the new string */
155
char *copy = strdup(new);
183
char *copy;
184
do {
185
copy = strdup(new);
186
} while(copy == NULL and errno == EINTR);
156
187
if(copy == NULL){
157
188
return false;
158
189
}
173
204
}
174
205
175
206
/* Add to a plugin's environment */
176
static bool add_environment(plugin *p, const char *def){
207
static bool add_environment(plugin *p, const char *def, bool replace){
177
208
if(p == NULL){
178
209
return false;
179
210
}
211
/* namelen = length of name of environment variable */
212
size_t namelen = (size_t)(strchrnul(def, '=') - def);
213
/* Search for this environment variable */
214
for(char **e = p->environ; *e != NULL; e++){
215
if(strncmp(*e, def, namelen + 1) == 0){
216
/* It already exists */
217
if(replace){
218
char *new;
219
do {
220
new = realloc(*e, strlen(def) + 1);
221
} while(new == NULL and errno == EINTR);
222
if(new == NULL){
223
return false;
224
}
225
*e = new;
226
strcpy(*e, def);
227
}
228
return true;
229
}
230
}
180
231
return add_to_char_array(def, &(p->environ), &(p->envc));
181
232
}
182
233
183
184
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/*
185
235
* Based on the example in the GNU LibC manual chapter 13.13 "File
186
236
* Descriptor Flags".
187
* *Note File Descriptor Flags:(libc)Descriptor Flags.
237
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
188
238
*/
189
static int set_cloexec_flag(int fd)
190
{
191
int ret = fcntl(fd, F_GETFD, 0);
239
static int set_cloexec_flag(int fd){
240
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
192
241
/* If reading the flags failed, return error indication now. */
193
242
if(ret < 0){
194
243
return ret;
195
244
}
196
245
/* Store modified flag word in the descriptor. */
197
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
246
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
247
ret | FD_CLOEXEC));
198
248
}
199
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process *process_list = NULL;
201
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/* Mark a process as completed when it exits, and save its exit
251
/* Mark processes as completed when they exit, and save their exit
203
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status. */
204
void handle_sigchld(__attribute__((unused)) int sig){
205
process *proc = process_list;
206
int status;
207
pid_t pid = wait(&status);
208
if(pid == -1){
209
perror("wait");
210
return;
211
}
212
while(proc != NULL and proc->pid != pid){
213
proc = proc->next;
214
}
215
if(proc == NULL){
216
/* Process not found in process list */
217
return;
218
}
219
proc->status = status;
220
proc->completed = true;
253
static void handle_sigchld(__attribute__((unused)) int sig){
254
int old_errno = errno;
255
while(true){
256
plugin *proc = plugin_list;
257
int status;
258
pid_t pid = waitpid(-1, &status, WNOHANG);
259
if(pid == 0){
260
/* Only still running child processes */
261
break;
262
}
263
if(pid == -1){
264
if(errno == ECHILD){
265
/* No child processes */
266
break;
267
}
268
perror("waitpid");
269
}
270
271
/* A child exited, find it in process_list */
272
while(proc != NULL and proc->pid != pid){
273
proc = proc->next;
274
}
275
if(proc == NULL){
276
/* Process not found in process list */
277
continue;
278
}
279
proc->status = status;
280
proc->completed = 1;
281
}
282
errno = old_errno;
221
283
}
222
284
223
bool print_out_password(const char *buffer, size_t length){
285
/* Prints out a password to stdout */
286
static bool print_out_password(const char *buffer, size_t length){
224
287
ssize_t ret;
225
if(length>0 and buffer[length-1] == '\n'){
226
length--;
227
}
228
288
for(size_t written = 0; written < length; written += (size_t)ret){
229
289
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
230
290
length - written));
235
295
return true;
236
296
}
237
297
238
char **add_to_argv(char **argv, int *argc, char *arg){
239
if (argv == NULL){
240
*argc = 1;
241
argv = malloc(sizeof(char*) * 2);
242
if(argv == NULL){
243
return NULL;
298
/* Removes and free a plugin from the plugin list */
299
static void free_plugin(plugin *plugin_node){
300
301
for(char **arg = plugin_node->argv; *arg != NULL; arg++){
302
free(*arg);
303
}
304
free(plugin_node->argv);
305
for(char **env = plugin_node->environ; *env != NULL; env++){
306
free(*env);
307
}
308
free(plugin_node->environ);
309
free(plugin_node->buffer);
310
311
/* Removes the plugin from the singly-linked list */
312
if(plugin_node == plugin_list){
313
/* First one - simple */
314
plugin_list = plugin_list->next;
315
} else {
316
/* Second one or later */
317
for(plugin *p = plugin_list; p != NULL; p = p->next){
318
if(p->next == plugin_node){
319
p->next = plugin_node->next;
320
break;
321
}
244
322
}
245
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
246
argv[1] = NULL;
247
}
248
*argc += 1;
249
argv = realloc(argv, sizeof(char *)
250
* ((unsigned int) *argc + 1));
251
if(argv == NULL){
252
return NULL;
253
}
254
argv[*argc-1] = arg;
255
argv[*argc] = NULL;
256
return argv;
323
}
324
325
free(plugin_node);
257
326
}
258
327
259
static void free_plugin_list(plugin *plugin_list){
260
for(plugin *next; plugin_list != NULL; plugin_list = next){
261
next = plugin_list->next;
262
for(char **arg = plugin_list->argv; *arg != NULL; arg++){
263
free(*arg);
264
}
265
free(plugin_list->argv);
266
for(char **env = plugin_list->environ; *env != NULL; env++){
267
free(*env);
268
}
269
free(plugin_list->environ);
270
free(plugin_list);
328
static void free_plugin_list(void){
329
while(plugin_list != NULL){
330
free_plugin(plugin_list);
271
331
}
272
332
}
273
333
274
334
int main(int argc, char *argv[]){
275
const char *plugindir = "/lib/mandos/plugins.d";
276
const char *argfile = ARGFILE;
335
char *plugindir = NULL;
336
char *argfile = NULL;
277
337
FILE *conffp;
278
338
size_t d_name_len;
279
339
DIR *dir = NULL;
281
341
struct stat st;
282
342
fd_set rfds_all;
283
343
int ret, maxfd = 0;
344
ssize_t sret;
284
345
uid_t uid = 65534;
285
346
gid_t gid = 65534;
286
347
bool debug = false;
311
372
{ .name = "global-options", .key = 'g',
312
373
.arg = "OPTION[,OPTION[,...]]",
313
374
.doc = "Options passed to all plugins" },
314
{ .name = "global-envs", .key = 'e',
375
{ .name = "global-env", .key = 'G',
315
376
.arg = "VAR=value",
316
377
.doc = "Environment variable passed to all plugins" },
317
378
{ .name = "options-for", .key = 'o',
318
379
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
319
380
.doc = "Options passed only to specified plugin" },
320
{ .name = "envs-for", .key = 'f',
381
{ .name = "env-for", .key = 'E',
321
382
.arg = "PLUGIN:ENV=value",
322
383
.doc = "Environment variable passed to specified plugin" },
323
384
{ .name = "disable", .key = 'd',
324
385
.arg = "PLUGIN",
325
386
.doc = "Disable a specific plugin", .group = 1 },
387
{ .name = "enable", .key = 'e',
388
.arg = "PLUGIN",
389
.doc = "Enable a specific plugin", .group = 1 },
326
390
{ .name = "plugin-dir", .key = 128,
327
391
.arg = "DIRECTORY",
328
392
.doc = "Specify a different plugin directory", .group = 2 },
329
{ .name = "userid", .key = 129,
330
.arg = "ID", .flags = 0,
331
.doc = "User ID the plugins will run as", .group = 2 },
332
{ .name = "groupid", .key = 130,
333
.arg = "ID", .flags = 0,
334
.doc = "Group ID the plugins will run as", .group = 2 },
335
{ .name = "debug", .key = 131,
336
.doc = "Debug mode", .group = 3 },
393
{ .name = "config-file", .key = 129,
394
.arg = "FILE",
395
.doc = "Specify a different configuration file", .group = 2 },
396
{ .name = "userid", .key = 130,
397
.arg = "ID", .flags = 0,
398
.doc = "User ID the plugins will run as", .group = 3 },
399
{ .name = "groupid", .key = 131,
400
.arg = "ID", .flags = 0,
401
.doc = "Group ID the plugins will run as", .group = 3 },
402
{ .name = "debug", .key = 132,
403
.doc = "Debug mode", .group = 4 },
404
/*
405
* These reproduce what we would get without ARGP_NO_HELP
406
*/
407
{ .name = "help", .key = '?',
408
.doc = "Give this help list", .group = -1 },
409
{ .name = "usage", .key = -3,
410
.doc = "Give a short usage message", .group = -1 },
411
{ .name = "version", .key = 'V',
412
.doc = "Print program version", .group = -1 },
337
413
{ .name = NULL }
338
414
};
339
415
340
error_t parse_opt (int key, char *arg, struct argp_state *state) {
341
/* Get the INPUT argument from `argp_parse', which we know is a
342
pointer to our plugin list pointer. */
343
plugin **plugins = state->input;
344
switch (key) {
345
case 'g':
346
if (arg != NULL){
347
char *p;
348
while((p = strsep(&arg, ",")) != NULL){
349
if(p[0] == '\0'){
350
continue;
351
}
352
if(not add_argument(getplugin(NULL, plugins), p)){
353
perror("add_argument");
354
return ARGP_ERR_UNKNOWN;
355
}
356
}
357
}
358
break;
359
case 'e':
360
if(arg == NULL){
361
break;
362
}
363
{
364
char *envdef = strdup(arg);
365
if(envdef == NULL){
366
break;
367
}
368
if(not add_environment(getplugin(NULL, plugins), envdef)){
369
perror("add_environment");
370
}
371
}
372
break;
373
case 'o':
374
if (arg != NULL){
375
char *p_name = strsep(&arg, ":");
376
if(p_name[0] == '\0'){
377
break;
378
}
379
char *opt = strsep(&arg, ":");
380
if(opt[0] == '\0'){
381
break;
382
}
383
if(opt != NULL){
384
char *p;
385
while((p = strsep(&opt, ",")) != NULL){
386
if(p[0] == '\0'){
387
continue;
388
}
389
if(not add_argument(getplugin(p_name, plugins), p)){
390
perror("add_argument");
391
return ARGP_ERR_UNKNOWN;
392
}
393
}
394
}
395
}
396
break;
397
case 'f':
398
if(arg == NULL){
399
break;
400
}
416
error_t parse_opt(int key, char *arg, struct argp_state *state){
417
errno = 0;
418
switch(key){
419
char *tmp;
420
intmax_t tmpmax;
421
case 'g': /* --global-options */
422
{
423
char *plugin_option;
424
while((plugin_option = strsep(&arg, ",")) != NULL){
425
if(not add_argument(getplugin(NULL), plugin_option)){
426
break;
427
}
428
}
429
}
430
break;
431
case 'G': /* --global-env */
432
add_environment(getplugin(NULL), arg, true);
433
break;
434
case 'o': /* --options-for */
435
{
436
char *option_list = strchr(arg, ':');
437
if(option_list == NULL){
438
argp_error(state, "No colon in \"%s\"", arg);
439
errno = EINVAL;
440
break;
441
}
442
*option_list = '\0';
443
option_list++;
444
if(arg[0] == '\0'){
445
argp_error(state, "Empty plugin name");
446
errno = EINVAL;
447
break;
448
}
449
char *option;
450
while((option = strsep(&option_list, ",")) != NULL){
451
if(not add_argument(getplugin(arg), option)){
452
break;
453
}
454
}
455
}
456
break;
457
case 'E': /* --env-for */
401
458
{
402
459
char *envdef = strchr(arg, ':');
403
460
if(envdef == NULL){
404
break;
405
}
406
char *p_name = strndup(arg, (size_t) (envdef-arg));
407
if(p_name == NULL){
408
break;
409
}
461
argp_error(state, "No colon in \"%s\"", arg);
462
errno = EINVAL;
463
break;
464
}
465
*envdef = '\0';
410
466
envdef++;
411
if(not add_environment(getplugin(p_name, plugins), envdef)){
412
perror("add_environment");
413
}
414
}
415
break;
416
case 'd':
417
if (arg != NULL){
418
plugin *p = getplugin(arg, plugins);
419
if(p == NULL){
420
return ARGP_ERR_UNKNOWN;
421
}
422
p->disabled = true;
423
}
424
break;
425
case 128:
426
plugindir = arg;
427
break;
428
case 129:
429
uid = (uid_t)strtol(arg, NULL, 10);
430
break;
431
case 130:
432
gid = (gid_t)strtol(arg, NULL, 10);
433
break;
434
case 131:
467
if(arg[0] == '\0'){
468
argp_error(state, "Empty plugin name");
469
errno = EINVAL;
470
break;
471
}
472
add_environment(getplugin(arg), envdef, true);
473
}
474
break;
475
case 'd': /* --disable */
476
{
477
plugin *p = getplugin(arg);
478
if(p != NULL){
479
p->disabled = true;
480
}
481
}
482
break;
483
case 'e': /* --enable */
484
{
485
plugin *p = getplugin(arg);
486
if(p != NULL){
487
p->disabled = false;
488
}
489
}
490
break;
491
case 128: /* --plugin-dir */
492
free(plugindir);
493
plugindir = strdup(arg);
494
break;
495
case 129: /* --config-file */
496
/* This is already done by parse_opt_config_file() */
497
break;
498
case 130: /* --userid */
499
tmpmax = strtoimax(arg, &tmp, 10);
500
if(errno != 0 or tmp == arg or *tmp != '\0'
501
or tmpmax != (uid_t)tmpmax){
502
argp_error(state, "Bad user ID number: \"%s\", using %"
503
PRIdMAX, arg, (intmax_t)uid);
504
break;
505
}
506
uid = (uid_t)tmpmax;
507
break;
508
case 131: /* --groupid */
509
tmpmax = strtoimax(arg, &tmp, 10);
510
if(errno != 0 or tmp == arg or *tmp != '\0'
511
or tmpmax != (gid_t)tmpmax){
512
argp_error(state, "Bad group ID number: \"%s\", using %"
513
PRIdMAX, arg, (intmax_t)gid);
514
break;
515
}
516
gid = (gid_t)tmpmax;
517
break;
518
case 132: /* --debug */
435
519
debug = true;
436
520
break;
437
case ARGP_KEY_ARG:
438
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
439
break;
440
case ARGP_KEY_END:
441
break;
442
default:
443
return ARGP_ERR_UNKNOWN;
444
}
445
return 0;
446
}
447
448
plugin *plugin_list = NULL;
449
450
struct argp argp = { .options = options, .parser = parse_opt,
451
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
521
/*
522
* These reproduce what we would get without ARGP_NO_HELP
523
*/
524
case '?': /* --help */
525
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
526
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
527
case -3: /* --usage */
528
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
529
argp_state_help(state, state->out_stream,
530
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
531
case 'V': /* --version */
532
fprintf(state->out_stream, "%s\n", argp_program_version);
533
exit(EXIT_SUCCESS);
534
break;
535
/*
536
* When adding more options before this line, remember to also add a
537
* "case" to the "parse_opt_config_file" function below.
538
*/
539
case ARGP_KEY_ARG:
540
/* Cryptsetup always passes an argument, which is an empty
541
string if "none" was specified in /etc/crypttab. So if
542
argument was empty, we ignore it silently. */
543
if(arg[0] == '\0'){
544
break;
545
}
546
default:
547
return ARGP_ERR_UNKNOWN;
548
}
549
return errno; /* Set to 0 at start */
550
}
551
552
/* This option parser is the same as parse_opt() above, except it
553
ignores everything but the --config-file option. */
554
error_t parse_opt_config_file(int key, char *arg,
555
__attribute__((unused))
556
struct argp_state *state){
557
errno = 0;
558
switch(key){
559
case 'g': /* --global-options */
560
case 'G': /* --global-env */
561
case 'o': /* --options-for */
562
case 'E': /* --env-for */
563
case 'd': /* --disable */
564
case 'e': /* --enable */
565
case 128: /* --plugin-dir */
566
break;
567
case 129: /* --config-file */
568
free(argfile);
569
argfile = strdup(arg);
570
break;
571
case 130: /* --userid */
572
case 131: /* --groupid */
573
case 132: /* --debug */
574
case '?': /* --help */
575
case -3: /* --usage */
576
case 'V': /* --version */
577
case ARGP_KEY_ARG:
578
break;
579
default:
580
return ARGP_ERR_UNKNOWN;
581
}
582
return errno;
583
}
584
585
struct argp argp = { .options = options,
586
.parser = parse_opt_config_file,
587
.args_doc = "",
452
588
.doc = "Mandos plugin runner -- Run plugins" };
453
589
454
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
455
if (ret == ARGP_ERR_UNKNOWN){
456
fprintf(stderr, "Unknown error while parsing arguments\n");
457
exitstatus = EXIT_FAILURE;
458
goto fallback;
459
}
460
461
conffp = fopen(argfile, "r");
590
/* Parse using parse_opt_config_file() in order to get the custom
591
config file location, if any. */
592
ret = argp_parse(&argp, argc, argv,
593
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
594
NULL, NULL);
595
switch(ret){
596
case 0:
597
break;
598
case ENOMEM:
599
default:
600
errno = ret;
601
perror("argp_parse");
602
exitstatus = EX_OSERR;
603
goto fallback;
604
case EINVAL:
605
exitstatus = EX_USAGE;
606
goto fallback;
607
}
608
609
/* Reset to the normal argument parser */
610
argp.parser = parse_opt;
611
612
/* Open the configfile if available */
613
if(argfile == NULL){
614
conffp = fopen(AFILE, "r");
615
} else {
616
conffp = fopen(argfile, "r");
617
}
462
618
if(conffp != NULL){
463
619
char *org_line = NULL;
464
620
char *p, *arg, *new_arg, *line;
465
621
size_t size = 0;
466
ssize_t sret;
467
622
const char whitespace_delims[] = " \r\t\f\v\n";
468
623
const char comment_delim[] = "#";
469
624
625
custom_argc = 1;
626
custom_argv = malloc(sizeof(char*) * 2);
627
if(custom_argv == NULL){
628
perror("malloc");
629
exitstatus = EXIT_FAILURE;
630
goto fallback;
631
}
632
custom_argv[0] = argv[0];
633
custom_argv[1] = NULL;
634
635
/* for each line in the config file, strip whitespace and ignore
636
commented text */
470
637
while(true){
471
638
sret = getline(&org_line, &size, conffp);
472
639
if(sret == -1){
473
640
break;
474
641
}
475
642
476
643
line = org_line;
477
644
arg = strsep(&line, comment_delim);
478
645
while((p = strsep(&arg, whitespace_delims)) != NULL){
480
647
continue;
481
648
}
482
649
new_arg = strdup(p);
483
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
484
if (custom_argv == NULL){
485
perror("add_to_argv");
486
exitstatus = EXIT_FAILURE;
487
goto fallback;
488
}
650
if(new_arg == NULL){
651
perror("strdup");
652
exitstatus = EXIT_FAILURE;
653
free(org_line);
654
goto fallback;
655
}
656
657
custom_argc += 1;
658
custom_argv = realloc(custom_argv, sizeof(char *)
659
* ((unsigned int) custom_argc + 1));
660
if(custom_argv == NULL){
661
perror("realloc");
662
exitstatus = EXIT_FAILURE;
663
free(org_line);
664
goto fallback;
665
}
666
custom_argv[custom_argc-1] = new_arg;
667
custom_argv[custom_argc] = NULL;
489
668
}
490
669
}
670
do {
671
ret = fclose(conffp);
672
} while(ret == EOF and errno == EINTR);
673
if(ret == EOF){
674
perror("fclose");
675
exitstatus = EXIT_FAILURE;
676
goto fallback;
677
}
491
678
free(org_line);
492
} else{
679
} else {
493
680
/* Check for harmful errors and go to fallback. Other errors might
494
681
not affect opening plugins */
495
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
682
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
496
683
perror("fopen");
497
684
exitstatus = EXIT_FAILURE;
498
685
goto fallback;
499
686
}
500
687
}
501
688
/* If there were any arguments from the configuration file, pass
689
them to parser as command line arguments */
502
690
if(custom_argv != NULL){
503
custom_argv[0] = argv[0];
504
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
505
if (ret == ARGP_ERR_UNKNOWN){
506
fprintf(stderr, "Unknown error while parsing arguments\n");
507
exitstatus = EXIT_FAILURE;
691
ret = argp_parse(&argp, custom_argc, custom_argv,
692
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
693
NULL, NULL);
694
switch(ret){
695
case 0:
696
break;
697
case ENOMEM:
698
default:
699
errno = ret;
700
perror("argp_parse");
701
exitstatus = EX_OSERR;
702
goto fallback;
703
case EINVAL:
704
exitstatus = EX_CONFIG;
508
705
goto fallback;
509
706
}
510
707
}
511
708
709
/* Parse actual command line arguments, to let them override the
710
config file */
711
ret = argp_parse(&argp, argc, argv,
712
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
713
NULL, NULL);
714
switch(ret){
715
case 0:
716
break;
717
case ENOMEM:
718
default:
719
errno = ret;
720
perror("argp_parse");
721
exitstatus = EX_OSERR;
722
goto fallback;
723
case EINVAL:
724
exitstatus = EX_USAGE;
725
goto fallback;
726
}
727
512
728
if(debug){
513
729
for(plugin *p = plugin_list; p != NULL; p=p->next){
514
730
fprintf(stderr, "Plugin: %s has %d arguments\n",
516
732
for(char **a = p->argv; *a != NULL; a++){
517
733
fprintf(stderr, "\tArg: %s\n", *a);
518
734
}
519
fprintf(stderr, "...and %u environment variables\n", p->envc);
735
fprintf(stderr, "...and %d environment variables\n", p->envc);
520
736
for(char **a = p->environ; *a != NULL; a++){
521
737
fprintf(stderr, "\t%s\n", *a);
522
738
}
523
739
}
524
740
}
525
741
742
/* Strip permissions down to nobody */
743
setgid(gid);
744
if(ret == -1){
745
perror("setgid");
746
}
526
747
ret = setuid(uid);
527
if (ret == -1){
748
if(ret == -1){
528
749
perror("setuid");
529
750
}
530
751
531
setgid(gid);
532
if (ret == -1){
533
perror("setgid");
534
}
535
536
dir = opendir(plugindir);
537
if(dir == NULL){
538
perror("Could not open plugin dir");
539
exitstatus = EXIT_FAILURE;
540
goto fallback;
541
}
542
543
/* Set the FD_CLOEXEC flag on the directory, if possible */
752
/* Open plugin directory with close_on_exec flag */
544
753
{
545
int dir_fd = dirfd(dir);
546
if(dir_fd >= 0){
547
ret = set_cloexec_flag(dir_fd);
548
if(ret < 0){
549
perror("set_cloexec_flag");
550
exitstatus = EXIT_FAILURE;
551
goto fallback;
552
}
754
int dir_fd = -1;
755
if(plugindir == NULL){
756
dir_fd = open(PDIR, O_RDONLY |
757
#ifdef O_CLOEXEC
758
O_CLOEXEC
759
#else /* not O_CLOEXEC */
760
0
761
#endif /* not O_CLOEXEC */
762
);
763
} else {
764
dir_fd = open(plugindir, O_RDONLY |
765
#ifdef O_CLOEXEC
766
O_CLOEXEC
767
#else /* not O_CLOEXEC */
768
0
769
#endif /* not O_CLOEXEC */
770
);
771
}
772
if(dir_fd == -1){
773
perror("Could not open plugin dir");
774
exitstatus = EXIT_FAILURE;
775
goto fallback;
776
}
777
778
#ifndef O_CLOEXEC
779
/* Set the FD_CLOEXEC flag on the directory */
780
ret = set_cloexec_flag(dir_fd);
781
if(ret < 0){
782
perror("set_cloexec_flag");
783
TEMP_FAILURE_RETRY(close(dir_fd));
784
exitstatus = EXIT_FAILURE;
785
goto fallback;
786
}
787
#endif /* O_CLOEXEC */
788
789
dir = fdopendir(dir_fd);
790
if(dir == NULL){
791
perror("Could not open plugin dir");
792
TEMP_FAILURE_RETRY(close(dir_fd));
793
exitstatus = EXIT_FAILURE;
794
goto fallback;
553
795
}
554
796
}
555
797
556
798
FD_ZERO(&rfds_all);
557
799
800
/* Read and execute any executable in the plugin directory*/
558
801
while(true){
559
dirst = readdir(dir);
802
do {
803
dirst = readdir(dir);
804
} while(dirst == NULL and errno == EINTR);
560
805
561
// All directory entries have been processed
806
/* All directory entries have been processed */
562
807
if(dirst == NULL){
563
if (errno == EBADF){
808
if(errno == EBADF){
564
809
perror("readdir");
565
810
exitstatus = EXIT_FAILURE;
566
811
goto fallback;
570
815
571
816
d_name_len = strlen(dirst->d_name);
572
817
573
// Ignore dotfiles, backup files and other junk
818
/* Ignore dotfiles, backup files and other junk */
574
819
{
575
820
bool bad_name = false;
576
821
578
823
579
824
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
580
825
".dpkg-old",
826
".dpkg-bak",
581
827
".dpkg-divert", NULL };
582
828
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
583
829
size_t pre_len = strlen(*pre);
591
837
break;
592
838
}
593
839
}
594
595
840
if(bad_name){
596
841
continue;
597
842
}
598
599
843
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
600
844
size_t suf_len = strlen(*suf);
601
845
if((d_name_len >= suf_len)
614
858
continue;
615
859
}
616
860
}
617
861
618
862
char *filename;
619
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
863
if(plugindir == NULL){
864
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
865
dirst->d_name));
866
} else {
867
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
868
plugindir,
869
dirst->d_name));
870
}
620
871
if(ret < 0){
621
872
perror("asprintf");
622
873
continue;
623
874
}
624
875
625
ret = stat(filename, &st);
626
if (ret == -1){
876
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
877
if(ret == -1){
627
878
perror("stat");
628
879
free(filename);
629
880
continue;
630
881
}
631
882
632
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
883
/* Ignore non-executable files */
884
if(not S_ISREG(st.st_mode)
885
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
633
886
if(debug){
634
887
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
635
888
" with bad type or mode\n", filename);
637
890
free(filename);
638
891
continue;
639
892
}
640
plugin *p = getplugin(dirst->d_name, &plugin_list);
893
894
plugin *p = getplugin(dirst->d_name);
641
895
if(p == NULL){
642
896
perror("getplugin");
643
897
free(filename);
653
907
}
654
908
{
655
909
/* Add global arguments to argument list for this plugin */
656
plugin *g = getplugin(NULL, &plugin_list);
910
plugin *g = getplugin(NULL);
657
911
if(g != NULL){
658
912
for(char **a = g->argv + 1; *a != NULL; a++){
659
913
if(not add_argument(p, *a)){
662
916
}
663
917
/* Add global environment variables */
664
918
for(char **e = g->environ; *e != NULL; e++){
665
if(not add_environment(p, *e)){
919
if(not add_environment(p, *e, false)){
666
920
perror("add_environment");
667
921
}
668
922
}
673
927
process, too. */
674
928
if(p->environ[0] != NULL){
675
929
for(char **e = environ; *e != NULL; e++){
676
char *copy = strdup(*e);
677
if(copy == NULL){
678
perror("strdup");
679
continue;
680
}
681
if(not add_environment(p, copy)){
930
if(not add_environment(p, *e, false)){
682
931
perror("add_environment");
683
932
}
684
933
}
685
934
}
686
935
687
936
int pipefd[2];
688
ret = pipe(pipefd);
689
if (ret == -1){
937
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
938
if(ret == -1){
690
939
perror("pipe");
691
940
exitstatus = EXIT_FAILURE;
692
941
goto fallback;
693
942
}
943
/* Ask OS to automatic close the pipe on exec */
694
944
ret = set_cloexec_flag(pipefd[0]);
695
945
if(ret < 0){
696
946
perror("set_cloexec_flag");
704
954
goto fallback;
705
955
}
706
956
/* Block SIGCHLD until process is safely in process list */
707
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
957
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
958
&sigchld_action.sa_mask,
959
NULL));
708
960
if(ret < 0){
709
961
perror("sigprocmask");
710
962
exitstatus = EXIT_FAILURE;
711
963
goto fallback;
712
964
}
713
// Starting a new process to be watched
714
pid_t pid = fork();
965
/* Starting a new process to be watched */
966
pid_t pid;
967
do {
968
pid = fork();
969
} while(pid == -1 and errno == EINTR);
715
970
if(pid == -1){
716
971
perror("fork");
717
972
exitstatus = EXIT_FAILURE;
724
979
perror("sigaction");
725
980
_exit(EXIT_FAILURE);
726
981
}
727
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
982
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
728
983
if(ret < 0){
729
984
perror("sigprocmask");
730
985
_exit(EXIT_FAILURE);
731
986
}
732
987
733
988
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
734
989
if(ret == -1){
735
990
perror("dup2");
754
1009
}
755
1010
/* no return */
756
1011
}
757
/* parent process */
1012
/* Parent process */
1013
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1014
pipe */
758
1015
free(filename);
759
close(pipefd[1]); /* close unused write end of pipe */
760
process *new_process = malloc(sizeof(process));
761
if (new_process == NULL){
762
perror("malloc");
763
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1016
plugin *new_plugin = getplugin(dirst->d_name);
1017
if(new_plugin == NULL){
1018
perror("getplugin");
1019
ret = (int)(TEMP_FAILURE_RETRY
1020
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
1021
NULL)));
764
1022
if(ret < 0){
765
perror("sigprocmask");
1023
perror("sigprocmask");
766
1024
}
767
1025
exitstatus = EXIT_FAILURE;
768
1026
goto fallback;
769
1027
}
770
1028
771
*new_process = (struct process){ .pid = pid,
772
.fd = pipefd[0],
773
.next = process_list };
774
// List handling
775
process_list = new_process;
1029
new_plugin->pid = pid;
1030
new_plugin->fd = pipefd[0];
1031
776
1032
/* Unblock SIGCHLD so signal handler can be run if this process
777
1033
has already completed */
778
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1034
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1035
&sigchld_action.sa_mask,
1036
NULL));
779
1037
if(ret < 0){
780
1038
perror("sigprocmask");
781
1039
exitstatus = EXIT_FAILURE;
782
1040
goto fallback;
783
1041
}
784
1042
785
FD_SET(new_process->fd, &rfds_all);
1043
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1044
-Wconversion */
786
1045
787
if (maxfd < new_process->fd){
788
maxfd = new_process->fd;
1046
if(maxfd < new_plugin->fd){
1047
maxfd = new_plugin->fd;
789
1048
}
790
791
1049
}
792
1050
793
free_plugin_list(plugin_list);
794
plugin_list = NULL;
795
796
closedir(dir);
1051
TEMP_FAILURE_RETRY(closedir(dir));
797
1052
dir = NULL;
798
799
if (process_list == NULL){
800
fprintf(stderr, "No plugin processes started. Incorrect plugin"
801
" directory?\n");
802
process_list = NULL;
1053
free_plugin(getplugin(NULL));
1054
1055
for(plugin *p = plugin_list; p != NULL; p = p->next){
1056
if(p->pid != 0){
1057
break;
1058
}
1059
if(p->next == NULL){
1060
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1061
" directory?\n");
1062
free_plugin_list();
1063
}
803
1064
}
804
while(process_list){
1065
1066
/* Main loop while running plugins exist */
1067
while(plugin_list){
805
1068
fd_set rfds = rfds_all;
806
1069
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
807
if (select_ret == -1){
1070
if(select_ret == -1 and errno != EINTR){
808
1071
perror("select");
809
1072
exitstatus = EXIT_FAILURE;
810
1073
goto fallback;
811
1074
}
812
1075
/* OK, now either a process completed, or something can be read
813
1076
from one of them */
814
for(process *proc = process_list; proc ; proc = proc->next){
1077
for(plugin *proc = plugin_list; proc != NULL;){
815
1078
/* Is this process completely done? */
816
if(proc->eof and proc->completed){
1079
if(proc->completed and proc->eof){
817
1080
/* Only accept the plugin output if it exited cleanly */
818
1081
if(not WIFEXITED(proc->status)
819
1082
or WEXITSTATUS(proc->status) != 0){
820
1083
/* Bad exit by plugin */
1084
821
1085
if(debug){
822
1086
if(WIFEXITED(proc->status)){
823
fprintf(stderr, "Plugin %u exited with status %d\n",
824
(unsigned int) (proc->pid),
1087
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1088
" status %d\n", proc->name,
1089
(intmax_t) (proc->pid),
825
1090
WEXITSTATUS(proc->status));
826
} else if(WIFSIGNALED(proc->status)) {
827
fprintf(stderr, "Plugin %u killed by signal %d\n",
828
(unsigned int) (proc->pid),
829
WTERMSIG(proc->status));
1091
} else if(WIFSIGNALED(proc->status)){
1092
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1093
" signal %d: %s\n", proc->name,
1094
(intmax_t) (proc->pid),
1095
WTERMSIG(proc->status),
1096
strsignal(WTERMSIG(proc->status)));
830
1097
} else if(WCOREDUMP(proc->status)){
831
fprintf(stderr, "Plugin %d dumped core\n",
832
(unsigned int) (proc->pid));
1098
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1099
" core\n", proc->name, (intmax_t) (proc->pid));
833
1100
}
834
1101
}
1102
835
1103
/* Remove the plugin */
836
FD_CLR(proc->fd, &rfds_all);
1104
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1105
-Wconversion */
1106
837
1107
/* Block signal while modifying process_list */
838
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1108
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1109
(SIG_BLOCK,
1110
&sigchld_action.sa_mask,
1111
NULL));
839
1112
if(ret < 0){
840
1113
perror("sigprocmask");
841
1114
exitstatus = EXIT_FAILURE;
842
1115
goto fallback;
843
1116
}
844
/* Delete this process entry from the list */
845
if(process_list == proc){
846
/* First one - simple */
847
process_list = proc->next;
848
} else {
849
/* Second one or later */
850
for(process *p = process_list; p != NULL; p = p->next){
851
if(p->next == proc){
852
p->next = proc->next;
853
break;
854
}
855
}
856
}
1117
1118
plugin *next_plugin = proc->next;
1119
free_plugin(proc);
1120
proc = next_plugin;
1121
857
1122
/* We are done modifying process list, so unblock signal */
858
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
859
NULL);
1123
ret = (int)(TEMP_FAILURE_RETRY
1124
(sigprocmask(SIG_UNBLOCK,
1125
&sigchld_action.sa_mask, NULL)));
860
1126
if(ret < 0){
861
1127
perror("sigprocmask");
862
}
863
free(proc->buffer);
864
free(proc);
865
/* We deleted this process from the list, so we can't go
866
proc->next. Therefore, start over from the beginning of
867
the process list */
868
break;
1128
exitstatus = EXIT_FAILURE;
1129
goto fallback;
1130
}
1131
1132
if(plugin_list == NULL){
1133
break;
1134
}
1135
1136
continue;
869
1137
}
1138
870
1139
/* This process exited nicely, so print its buffer */
871
872
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1140
1141
bool bret = print_out_password(proc->buffer,
1142
proc->buffer_length);
873
1143
if(not bret){
874
1144
perror("print_out_password");
875
1145
exitstatus = EXIT_FAILURE;
876
1146
}
877
1147
goto fallback;
878
1148
}
1149
879
1150
/* This process has not completed. Does it have any output? */
880
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1151
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1152
warning from
1153
-Wconversion */
881
1154
/* This process had nothing to say at this time */
1155
proc = proc->next;
882
1156
continue;
883
1157
}
884
1158
/* Before reading, make the process' data buffer large enough */
885
1159
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
886
1160
proc->buffer = realloc(proc->buffer, proc->buffer_size
887
1161
+ (size_t) BUFFER_SIZE);
888
if (proc->buffer == NULL){
1162
if(proc->buffer == NULL){
889
1163
perror("malloc");
890
1164
exitstatus = EXIT_FAILURE;
891
1165
goto fallback;
893
1167
proc->buffer_size += BUFFER_SIZE;
894
1168
}
895
1169
/* Read from the process */
896
ret = read(proc->fd, proc->buffer + proc->buffer_length,
897
BUFFER_SIZE);
898
if(ret < 0){
1170
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1171
proc->buffer
1172
+ proc->buffer_length,
1173
BUFFER_SIZE));
1174
if(sret < 0){
899
1175
/* Read error from this process; ignore the error */
1176
proc = proc->next;
900
1177
continue;
901
1178
}
902
if(ret == 0){
1179
if(sret == 0){
903
1180
/* got EOF */
904
1181
proc->eof = true;
905
1182
} else {
906
proc->buffer_length += (size_t) ret;
1183
proc->buffer_length += (size_t) sret;
907
1184
}
908
1185
}
909
1186
}
910
911
1187
1188
912
1189
fallback:
913
1190
914
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
915
/* Fallback if all plugins failed, none are found or an error occured */
1191
if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
1192
/* Fallback if all plugins failed, none are found or an error
1193
occured */
916
1194
bool bret;
917
1195
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
918
1196
char *passwordbuffer = getpass("Password: ");
919
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1197
size_t len = strlen(passwordbuffer);
1198
/* Strip trailing newline */
1199
if(len > 0 and passwordbuffer[len-1] == '\n'){
1200
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1201
len--;
1202
}
1203
bret = print_out_password(passwordbuffer, len);
920
1204
if(not bret){
921
1205
perror("print_out_password");
922
1206
exitstatus = EXIT_FAILURE;
929
1213
perror("sigaction");
930
1214
exitstatus = EXIT_FAILURE;
931
1215
}
932
1216
933
1217
if(custom_argv != NULL){
934
for(char **arg = custom_argv; *arg != NULL; arg++){
1218
for(char **arg = custom_argv+1; *arg != NULL; arg++){
935
1219
free(*arg);
936
1220
}
937
1221
free(custom_argv);
938
1222
}
939
free_plugin_list(plugin_list);
940
1223
941
1224
if(dir != NULL){
942
1225
closedir(dir);
943
1226
}
944
1227
945
/* Free the process list and kill the processes */
946
for(process *next; process_list != NULL; process_list = next){
947
next = process_list->next;
948
close(process_list->fd);
949
ret = kill(process_list->pid, SIGTERM);
950
if(ret == -1 and errno != ESRCH){
951
/* set-uid proccesses migth not get closed */
952
perror("kill");
1228
/* Kill the processes */
1229
for(plugin *p = plugin_list; p != NULL; p = p->next){
1230
if(p->pid != 0){
1231
close(p->fd);
1232
ret = kill(p->pid, SIGTERM);
1233
if(ret == -1 and errno != ESRCH){
1234
/* Set-uid proccesses might not get closed */
1235
perror("kill");
1236
}
953
1237
}
954
free(process_list->buffer);
955
free(process_list);
956
1238
}
957
1239
958
1240
/* Wait for any remaining child processes to terminate */
959
do{
1241
do {
960
1242
ret = wait(NULL);
961
1243
} while(ret >= 0);
962
1244
if(errno != ECHILD){
963
1245
perror("wait");
964
1246
}
965
1247
1248
free_plugin_list();
1249
1250
free(plugindir);
1251
free(argfile);
1252
966
1253
return exitstatus;
967
1254
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0