/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
1
/*  -*- coding: utf-8 -*- */
2
/*
3
 * Mandos plugin runner - Run Mandos plugins
4
 *
28 by Teddy Hogeborn
* server.conf: New file.
5
 * Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
6
 * 
7
 * This program is free software: you can redistribute it and/or
8
 * modify it under the terms of the GNU General Public License as
9
 * published by the Free Software Foundation, either version 3 of the
10
 * License, or (at your option) any later version.
11
 * 
12
 * This program is distributed in the hope that it will be useful, but
13
 * WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * General Public License for more details.
16
 * 
17
 * You should have received a copy of the GNU General Public License
18
 * along with this program.  If not, see
19
 * <http://www.gnu.org/licenses/>.
20
 * 
28 by Teddy Hogeborn
* server.conf: New file.
21
 * Contact the authors at <mandos@fukt.bsnet.se>.
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
22
 */
23
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
24
#define _GNU_SOURCE		/* TEMP_FAILURE_RETRY() */
25
24.1.26 by Björn Påhlsson
tally count of used symbols
26
#include <stddef.h>		/* size_t, NULL */
27
#include <stdlib.h>		/* malloc(), exit(), EXIT_FAILURE,
28
				   EXIT_SUCCESS, realloc() */
29
#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
33
				   stat, waitpid(), WIFEXITED(),
34
				   WEXITSTATUS(), wait(), pid_t,
35
				   uid_t, gid_t, getuid(), getgid(),
36
				   dirfd() */
37
#include <sys/select.h>		/* fd_set, select(), FD_ZERO(),
38
				   FD_SET(), FD_ISSET(), FD_CLR */
39
#include <sys/wait.h>		/* wait(), waitpid(), WIFEXITED(),
40
				   WEXITSTATUS() */
41
#include <sys/stat.h>		/* struct stat, stat(), S_ISREG() */
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
42
#include <iso646.h>		/* and, or, not */
43
#include <dirent.h>		/* DIR, struct dirent, opendir(),
24.1.26 by Björn Påhlsson
tally count of used symbols
44
				   readdir(), closedir(), dirfd() */
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
45
#include <unistd.h>		/* struct stat, stat(), S_ISREG(),
24.1.26 by Björn Påhlsson
tally count of used symbols
46
				   fcntl(), setuid(), setgid(),
47
				   F_GETFD, F_SETFD, FD_CLOEXEC,
48
				   access(), pipe(), fork(), close()
49
				   dup2, STDOUT_FILENO, _exit(),
50
				   execv(), write(), read(),
51
				   close() */
52
#include <fcntl.h>		/* fcntl(), F_GETFD, F_SETFD,
53
				   FD_CLOEXEC */
54
#include <string.h>		/* strtok, strlen(), strcpy(),
55
				   strcat() */
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
56
#include <errno.h>		/* errno */
24.1.26 by Björn Påhlsson
tally count of used symbols
57
#include <argp.h>		/* struct argp_option, struct
58
				   argp_state, struct argp,
59
				   argp_parse(), ARGP_ERR_UNKNOWN,
60
				   ARGP_KEY_END, ARGP_KEY_ARG, error_t */
61
#include <signal.h> 		/* struct sigaction, sigemptyset(),
62
				   sigaddset(), sigaction(),
63
				   sigprocmask(), SIG_BLOCK, SIGCHLD,
64
				   SIG_UNBLOCK, kill() */
65
#include <errno.h>		/* errno, EBADF */
13 by Björn Påhlsson
Added following support:
66
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
67
#define BUFFER_SIZE 256
68
13 by Björn Påhlsson
Added following support:
69
struct process;
70
71
typedef struct process{
72
  pid_t pid;
73
  int fd;
74
  char *buffer;
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
75
  size_t buffer_size;
76
  size_t buffer_length;
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
77
  bool eof;
78
  bool completed;
79
  int status;
13 by Björn Påhlsson
Added following support:
80
  struct process *next;
81
} process;
82
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
83
typedef struct plugin{
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
84
  char *name;			/* can be NULL or any plugin name */
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
85
  char **argv;
86
  int argc;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
87
  bool disabled;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
88
  struct plugin *next;
89
} plugin;
90
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
91
static plugin *getplugin(char *name, plugin **plugin_list){
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
92
  for (plugin *p = *plugin_list; p != NULL; p = p->next){
93
    if ((p->name == name)
94
	or (p->name and name and (strcmp(p->name, name) == 0))){
95
      return p;
96
    }
97
  }
98
  /* Create a new plugin */
99
  plugin *new_plugin = malloc(sizeof(plugin));
100
  if (new_plugin == NULL){
101
    perror("malloc");
102
    exit(EXIT_FAILURE);
103
  }
104
  new_plugin->name = name;
105
  new_plugin->argv = malloc(sizeof(char *) * 2);
106
  if (new_plugin->argv == NULL){
107
    perror("malloc");
108
    exit(EXIT_FAILURE);
109
  }
110
  new_plugin->argv[0] = name;
111
  new_plugin->argv[1] = NULL;
112
  new_plugin->argc = 1;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
113
  new_plugin->disabled = false;
24.1.5 by Björn Påhlsson
plugbasedclient:
114
  new_plugin->next = *plugin_list;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
115
  /* Append the new plugin to the list */
116
  *plugin_list = new_plugin;
117
  return new_plugin;
118
}
119
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
120
static void addargument(plugin *p, char *arg){
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
121
  p->argv[p->argc] = arg;
122
  p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
123
  if (p->argv == NULL){
124
    perror("malloc");
125
    exit(EXIT_FAILURE);
126
  }
127
  p->argc++;
128
  p->argv[p->argc] = NULL;
129
}
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
130
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
131
/*
132
 * Based on the example in the GNU LibC manual chapter 13.13 "File
133
 * Descriptor Flags".
134
 * *Note File Descriptor Flags:(libc)Descriptor Flags.
135
 */
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
136
static int set_cloexec_flag(int fd)
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
137
{
138
  int ret = fcntl(fd, F_GETFD, 0);
139
  /* If reading the flags failed, return error indication now. */
140
  if(ret < 0){
141
    return ret;
142
  }
143
  /* Store modified flag word in the descriptor. */
144
  return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
145
}
146
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
147
const char *argp_program_version = "plugbasedclient 0.9";
148
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
149
150
process *process_list = NULL;
151
152
/* Mark a process as completed when it exits, and save its exit
153
   status. */
154
void handle_sigchld(__attribute__((unused)) int sig){
155
  process *proc = process_list;
156
  int status;
157
  pid_t pid = wait(&status);
24.1.26 by Björn Påhlsson
tally count of used symbols
158
  if(pid == -1){
159
    perror("wait");
160
    return;
161
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
162
  while(proc != NULL and proc->pid != pid){
24.1.8 by Björn Påhlsson
plugbasedclient
163
    proc = proc->next;
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
164
  }
165
  if(proc == NULL){
166
    /* Process not found in process list */
167
    return;
168
  }
169
  proc->status = status;
170
  proc->completed = true;
171
}
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
172
13 by Björn Påhlsson
Added following support:
173
int main(int argc, char *argv[]){
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
174
  const char *plugindir = "/conf/conf.d/mandos/plugins.d";
24.1.5 by Björn Påhlsson
plugbasedclient:
175
  size_t d_name_len;
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
176
  DIR *dir = NULL;
13 by Björn Påhlsson
Added following support:
177
  struct dirent *dirst;
178
  struct stat st;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
179
  fd_set rfds_all;
13 by Björn Påhlsson
Added following support:
180
  int ret, maxfd = 0;
24.1.6 by Björn Påhlsson
plugbasedclient
181
  uid_t uid = 65534;
182
  gid_t gid = 65534;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
183
  bool debug = false;
184
  int exitstatus = EXIT_SUCCESS;
24.1.7 by Björn Påhlsson
merge
185
  struct sigaction old_sigchld_action;
186
  struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
187
				      .sa_flags = SA_NOCLDSTOP };
24.1.8 by Björn Påhlsson
plugbasedclient
188
  char *plus_options = NULL;
189
  char **plus_argv = NULL;
190
  
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
191
  /* Establish a signal handler */
192
  sigemptyset(&sigchld_action.sa_mask);
193
  ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
194
  if(ret < 0){
195
    perror("sigaddset");
196
    exit(EXIT_FAILURE);
197
  }
198
  ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
199
  if(ret < 0){
200
    perror("sigaction");
201
    exit(EXIT_FAILURE);
202
  }
203
  
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
204
  /* The options we understand. */
205
  struct argp_option options[] = {
206
    { .name = "global-options", .key = 'g',
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
207
      .arg = "OPTION[,OPTION[,...]]",
208
      .doc = "Options passed to all plugins" },
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
209
    { .name = "options-for", .key = 'o',
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
210
      .arg = "PLUGIN:OPTION[,OPTION[,...]]",
211
      .doc = "Options passed only to specified plugin" },
212
    { .name = "disable", .key = 'd',
213
      .arg = "PLUGIN",
214
      .doc = "Disable a specific plugin", .group = 1 },
24.1.5 by Björn Påhlsson
plugbasedclient:
215
    { .name = "plugin-dir", .key = 128,
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
216
      .arg = "DIRECTORY",
217
      .doc = "Specify a different plugin directory", .group = 2 },
24.1.6 by Björn Påhlsson
plugbasedclient
218
    { .name = "userid", .key = 129,
24.1.7 by Björn Påhlsson
merge
219
      .arg = "ID", .flags = 0,
220
      .doc = "User ID the plugins will run as", .group = 2 },
24.1.6 by Björn Påhlsson
plugbasedclient
221
    { .name = "groupid", .key = 130,
24.1.7 by Björn Påhlsson
merge
222
      .arg = "ID", .flags = 0,
223
      .doc = "Group ID the plugins will run as", .group = 2 },
224
    { .name = "debug", .key = 131,
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
225
      .doc = "Debug mode", .group = 3 },
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
226
    { .name = NULL }
227
  };
228
  
229
  error_t parse_opt (int key, char *arg, struct argp_state *state) {
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
230
    /* Get the INPUT argument from `argp_parse', which we know is a
231
       pointer to our plugin list pointer. */
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
232
    plugin **plugins = state->input;
233
    switch (key) {
234
    case 'g':
235
      if (arg != NULL){
236
	char *p = strtok(arg, ",");
237
	do{
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
238
	  addargument(getplugin(NULL, plugins), p);
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
239
	  p = strtok(NULL, ",");
24.1.8 by Björn Påhlsson
plugbasedclient
240
	} while (p != NULL);
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
241
      }
242
      break;
243
    case 'o':
244
      if (arg != NULL){
245
	char *name = strtok(arg, ":");
246
	char *p = strtok(NULL, ":");
24.1.8 by Björn Påhlsson
plugbasedclient
247
	if(p != NULL){
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
248
	  p = strtok(p, ",");
249
	  do{
250
	    addargument(getplugin(name, plugins), p);
251
	    p = strtok(NULL, ",");
24.1.8 by Björn Påhlsson
plugbasedclient
252
	  } while (p != NULL);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
253
	}
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
254
      }
255
      break;
24.1.5 by Björn Påhlsson
plugbasedclient:
256
    case 'd':
257
      if (arg != NULL){
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
258
	getplugin(arg, plugins)->disabled = true;
24.1.5 by Björn Påhlsson
plugbasedclient:
259
      }
260
      break;
261
    case 128:
262
      plugindir = arg;
263
      break;
24.1.6 by Björn Påhlsson
plugbasedclient
264
    case 129:
265
      uid = (uid_t)strtol(arg, NULL, 10);
266
      break;
267
    case 130:
268
      gid = (gid_t)strtol(arg, NULL, 10);
269
      break;
24.1.7 by Björn Påhlsson
merge
270
    case 131:
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
271
      debug = true;
272
      break;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
273
    case ARGP_KEY_ARG:
24.1.8 by Björn Påhlsson
plugbasedclient
274
      if(plus_options != NULL or arg == NULL or arg[0] != '+'){
275
	argp_usage (state);
276
      }
277
      plus_options = arg;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
278
      break;
279
    case ARGP_KEY_END:
280
      break;
281
    default:
282
      return ARGP_ERR_UNKNOWN;
283
    }
284
    return 0;
285
  }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
286
  
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
287
  plugin *plugin_list = NULL;
288
  
289
  struct argp argp = { .options = options, .parser = parse_opt,
24.1.8 by Björn Påhlsson
plugbasedclient
290
		       .args_doc = "[+PLUS_SEPARATED_OPTIONS]",
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
291
		       .doc = "Mandos plugin runner -- Run plugins" };
292
  
24.1.26 by Björn Påhlsson
tally count of used symbols
293
  ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
294
  if (ret == ARGP_ERR_UNKNOWN){
24.1.29 by Björn Påhlsson
Added more header file comments
295
    fprintf(stderr, "Unkown error while parsing arguments\n");
24.1.26 by Björn Påhlsson
tally count of used symbols
296
    exitstatus = EXIT_FAILURE;
297
    goto end;
298
  }
24.1.8 by Björn Påhlsson
plugbasedclient
299
  
300
  if(plus_options){
301
    /* This is a mangled argument in the form of
302
     "+--option+--other-option=parameter+--yet-another-option", etc */
303
    /* Make new argc and argv vars, and call argp_parse() again. */
304
    plus_options++;		/* skip the first '+' character */
305
    const char delims[] = "+";
306
    char *arg;
307
    int new_argc = 1;
308
    plus_argv = malloc(sizeof(char*) * 2);
309
    if(plus_argv == NULL){
310
      perror("malloc");
311
      exitstatus = EXIT_FAILURE;
312
      goto end;
313
    }
314
    plus_argv[0] = argv[0];
315
    plus_argv[1] = NULL;
316
    arg = strtok(plus_options, delims); /* Get first argument */
317
    while(arg != NULL){
318
      new_argc++;
319
      plus_argv = realloc(plus_argv, sizeof(char *)
320
			 * ((unsigned int) new_argc + 1));
321
      if(plus_argv == NULL){
24.1.26 by Björn Påhlsson
tally count of used symbols
322
	perror("realloc");
24.1.8 by Björn Påhlsson
plugbasedclient
323
	exitstatus = EXIT_FAILURE;
324
	goto end;
325
      }
326
      plus_argv[new_argc-1] = arg;
327
      plus_argv[new_argc] = NULL;
328
      arg = strtok(NULL, delims); /* Get next argument */
329
    }
24.1.26 by Björn Påhlsson
tally count of used symbols
330
    ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
331
    if (ret == ARGP_ERR_UNKNOWN){
24.1.29 by Björn Påhlsson
Added more header file comments
332
      fprintf(stderr, "Unkown error while parsing arguments\n");
24.1.26 by Björn Påhlsson
tally count of used symbols
333
      exitstatus = EXIT_FAILURE;
334
      goto end;
335
    }
24.1.8 by Björn Påhlsson
plugbasedclient
336
  }
337
  
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
338
  if(debug){
339
    for(plugin *p = plugin_list; p != NULL; p=p->next){
340
      fprintf(stderr, "Plugin: %s has %d arguments\n",
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
341
	      p->name ? p->name : "Global", p->argc - 1);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
342
      for(char **a = p->argv; *a != NULL; a++){
343
	fprintf(stderr, "\tArg: %s\n", *a);
344
      }
345
    }
346
  }
24.1.8 by Björn Påhlsson
plugbasedclient
347
  
24.1.6 by Björn Påhlsson
plugbasedclient
348
  ret = setuid(uid);
349
  if (ret == -1){
350
    perror("setuid");
351
  }
24.1.7 by Björn Påhlsson
merge
352
  
24.1.6 by Björn Påhlsson
plugbasedclient
353
  setgid(gid);
354
  if (ret == -1){
39 by Teddy Hogeborn
* plugins.d/mandosclient.c (pgp_packet_decrypt): Renamed variables.
355
    perror("setgid");
24.1.6 by Björn Påhlsson
plugbasedclient
356
  }
357
  
13 by Björn Påhlsson
Added following support:
358
  dir = opendir(plugindir);
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
359
  if(dir == NULL){
360
    perror("Could not open plugin dir");
361
    exitstatus = EXIT_FAILURE;
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
362
    goto end;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
363
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
364
  
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
365
  /* Set the FD_CLOEXEC flag on the directory, if possible */
366
  {
367
    int dir_fd = dirfd(dir);
368
    if(dir_fd >= 0){
369
      ret = set_cloexec_flag(dir_fd);
370
      if(ret < 0){
371
	perror("set_cloexec_flag");
372
	exitstatus = EXIT_FAILURE;
373
	goto end;
374
      }
375
    }
376
  }
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
377
  
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
378
  FD_ZERO(&rfds_all);
13 by Björn Påhlsson
Added following support:
379
  
380
  while(true){
381
    dirst = readdir(dir);
382
    
383
    // All directory entries have been processed
384
    if(dirst == NULL){
24.1.26 by Björn Påhlsson
tally count of used symbols
385
      if (errno == EBADF){
386
	perror("readdir");
387
	exitstatus = EXIT_FAILURE;
388
	goto end;
389
      }
13 by Björn Påhlsson
Added following support:
390
      break;
391
    }
392
    
393
    d_name_len = strlen(dirst->d_name);
394
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
395
    // Ignore dotfiles, backup files and other junk
396
    {
397
      bool bad_name = false;
398
      
399
      const char const *bad_prefixes[] = { ".", "#", NULL };
400
      
401
      const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
402
					   ".dpkg-old",
403
					   ".dpkg-divert", NULL };
404
      for(const char **pre = bad_prefixes; *pre != NULL; pre++){
405
	size_t pre_len = strlen(*pre);
406
	if((d_name_len >= pre_len)
407
	   and strncmp((dirst->d_name), *pre, pre_len) == 0){
408
	  if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
409
	    fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
410
		    " with bad prefix %s\n", dirst->d_name, *pre);
411
	  }
412
	  bad_name = true;
413
	  break;
414
	}
415
      }
416
      
417
      if(bad_name){
418
	continue;
419
      }
420
      
421
      for(const char **suf = bad_suffixes; *suf != NULL; suf++){
422
	size_t suf_len = strlen(*suf);
423
	if((d_name_len >= suf_len)
424
	   and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
425
		== 0)){
426
	  if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
427
	    fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
428
		    " with bad suffix %s\n", dirst->d_name, *suf);
429
	  }
430
	  bad_name = true;
431
	  break;
432
	}
433
      }
434
      
435
      if(bad_name){
436
	continue;
437
      }
13 by Björn Påhlsson
Added following support:
438
    }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
439
    
24.1.5 by Björn Påhlsson
plugbasedclient:
440
    char *filename = malloc(d_name_len + strlen(plugindir) + 2);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
441
    if (filename == NULL){
442
      perror("malloc");
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
443
      exitstatus = EXIT_FAILURE;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
444
      goto end;
445
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
446
    strcpy(filename, plugindir); /* Spurious warning */
447
    strcat(filename, "/");	/* Spurious warning */
448
    strcat(filename, dirst->d_name); /* Spurious warning */
449
    
24.1.26 by Björn Påhlsson
tally count of used symbols
450
    ret = stat(filename, &st);
451
    if (ret == -1){
452
      perror("stat");
453
      exitstatus = EXIT_FAILURE;
454
      goto end;
455
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
456
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
457
    if (not S_ISREG(st.st_mode)	or (access(filename, X_OK) != 0)){
458
      if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
459
	fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
460
		" with bad type or mode\n", filename);
461
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
462
      free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
463
      continue;
464
    }
465
    if(getplugin(dirst->d_name, &plugin_list)->disabled){
466
      if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
467
	fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
468
		dirst->d_name);
469
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
470
      free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
471
      continue;
472
    }
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
473
    plugin *p = getplugin(dirst->d_name, &plugin_list);
474
    {
475
      /* Add global arguments to argument list for this plugin */
476
      plugin *g = getplugin(NULL, &plugin_list);
477
      for(char **a = g->argv + 1; *a != NULL; a++){
478
	addargument(p, *a);
479
      }
480
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
481
    int pipefd[2]; 
482
    ret = pipe(pipefd);
483
    if (ret == -1){
484
      perror("pipe");
485
      exitstatus = EXIT_FAILURE;
486
      goto end;
487
    }
488
    ret = set_cloexec_flag(pipefd[0]);
489
    if(ret < 0){
490
      perror("set_cloexec_flag");
491
      exitstatus = EXIT_FAILURE;
492
      goto end;
493
    }
494
    ret = set_cloexec_flag(pipefd[1]);
495
    if(ret < 0){
496
      perror("set_cloexec_flag");
497
      exitstatus = EXIT_FAILURE;
498
      goto end;
499
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
500
    /* Block SIGCHLD until process is safely in process list */
501
    ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
502
    if(ret < 0){
503
      perror("sigprocmask");
504
      exitstatus = EXIT_FAILURE;
505
      goto end;
506
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
507
    // Starting a new process to be watched
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
508
    pid_t pid = fork();
509
    if(pid == 0){
510
      /* this is the child process */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
511
      ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
512
      if(ret < 0){
513
	perror("sigaction");
514
	_exit(EXIT_FAILURE);
515
      }
516
      ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
517
      if(ret < 0){
518
	perror("sigprocmask");
519
	_exit(EXIT_FAILURE);
520
      }
24.1.26 by Björn Påhlsson
tally count of used symbols
521
522
      ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
523
      if(ret == -1){
524
	perror("dup2");
525
	_exit(EXIT_FAILURE);
526
      }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
527
      
528
      if(dirfd(dir) < 0){
529
	/* If dir has no file descriptor, we could not set FD_CLOEXEC
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
530
	   above and must now close it manually here. */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
531
	closedir(dir);
33 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (main): Close the pipe fd after dup2:ing
532
      }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
533
      if(execv(filename, p->argv) < 0){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
534
	perror("execv");
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
535
	_exit(EXIT_FAILURE);
536
      }
537
      /* no return */
538
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
539
    /* parent process */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
540
    free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
541
    close(pipefd[1]);		/* close unused write end of pipe */
542
    process *new_process = malloc(sizeof(process));
543
    if (new_process == NULL){
544
      perror("malloc");
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
545
      ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
546
      if(ret < 0){
547
	perror("sigprocmask");
548
      }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
549
      exitstatus = EXIT_FAILURE;
550
      goto end;
551
    }
552
    
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
553
    *new_process = (struct process){ .pid = pid,
554
				     .fd = pipefd[0],
555
				     .next = process_list };
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
556
    // List handling
557
    process_list = new_process;
558
    /* Unblock SIGCHLD so signal handler can be run if this process
559
       has already completed */
560
    ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
561
    if(ret < 0){
562
      perror("sigprocmask");
563
      exitstatus = EXIT_FAILURE;
564
      goto end;
565
    }
566
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
567
    FD_SET(new_process->fd, &rfds_all);
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
568
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
569
    if (maxfd < new_process->fd){
570
      maxfd = new_process->fd;
571
    }
572
    
13 by Björn Påhlsson
Added following support:
573
  }
574
  
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
575
  /* Free the plugin list */
576
  for(plugin *next; plugin_list != NULL; plugin_list = next){
577
    next = plugin_list->next;
578
    free(plugin_list->argv);
579
    free(plugin_list);
580
  }
581
  
13 by Björn Påhlsson
Added following support:
582
  closedir(dir);
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
583
  dir = NULL;
24.1.26 by Björn Påhlsson
tally count of used symbols
584
    
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
585
  if (process_list == NULL){
586
    fprintf(stderr, "No plugin processes started, exiting\n");
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
587
    exitstatus = EXIT_FAILURE;
588
    goto end;
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
589
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
590
  while(process_list){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
591
    fd_set rfds = rfds_all;
592
    int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
593
    if (select_ret == -1){
594
      perror("select");
595
      exitstatus = EXIT_FAILURE;
596
      goto end;
597
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
598
    /* OK, now either a process completed, or something can be read
599
       from one of them */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
600
    for(process *proc = process_list; proc ; proc = proc->next){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
601
      /* Is this process completely done? */
602
      if(proc->eof and proc->completed){
603
	/* Only accept the plugin output if it exited cleanly */
604
	if(not WIFEXITED(proc->status)
605
	   or WEXITSTATUS(proc->status) != 0){
606
	  /* Bad exit by plugin */
607
	  if(debug){
608
	    if(WIFEXITED(proc->status)){
609
	      fprintf(stderr, "Plugin %d exited with status %d\n",
610
		      proc->pid, WEXITSTATUS(proc->status));
611
	    } else if(WIFSIGNALED(proc->status)) {
612
	      fprintf(stderr, "Plugin %d killed by signal %d\n",
613
		      proc->pid, WTERMSIG(proc->status));
614
	    } else if(WCOREDUMP(proc->status)){
615
	      fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
616
	    }
617
	  }
618
	  /* Remove the plugin */
619
	  FD_CLR(proc->fd, &rfds_all);
620
	  /* Block signal while modifying process_list */
621
	  ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
622
	  if(ret < 0){
623
	    perror("sigprocmask");
624
	    exitstatus = EXIT_FAILURE;
625
	    goto end;
626
	  }
627
	  /* Delete this process entry from the list */
628
	  if(process_list == proc){
629
	    /* First one - simple */
630
	    process_list = proc->next;
631
	  } else {
632
	    /* Second one or later */
633
	    for(process *p = process_list; p != NULL; p = p->next){
634
	      if(p->next == proc){
635
		p->next = proc->next;
636
		break;
637
	      }
638
	    }
639
	  }
640
	  /* We are done modifying process list, so unblock signal */
641
	  ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
642
			     NULL);
643
	  if(ret < 0){
644
	    perror("sigprocmask");
645
	  }
646
	  free(proc->buffer);
647
	  free(proc);
648
	  /* We deleted this process from the list, so we can't go
649
	     proc->next.  Therefore, start over from the beginning of
650
	     the process list */
651
	  break;
652
	}
653
	/* This process exited nicely, so print its buffer */
654
	for(size_t written = 0; written < proc->buffer_length;
655
	    written += (size_t)ret){
656
	  ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
657
					 proc->buffer + written,
658
					 proc->buffer_length
659
					 - written));
660
	  if(ret < 0){
661
	    perror("write");
662
	    exitstatus = EXIT_FAILURE;
663
	    goto end;
664
	  }
665
	}
666
	goto end;
667
      }
668
      /* This process has not completed.  Does it have any output? */
669
      if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
670
	/* This process had nothing to say at this time */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
671
	continue;
672
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
673
      /* Before reading, make the process' data buffer large enough */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
674
      if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
675
	proc->buffer = realloc(proc->buffer, proc->buffer_size
676
			       + (size_t) BUFFER_SIZE);
677
	if (proc->buffer == NULL){
678
	  perror("malloc");
679
	  exitstatus = EXIT_FAILURE;
680
	  goto end;
681
	}
682
	proc->buffer_size += BUFFER_SIZE;
683
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
684
      /* Read from the process */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
685
      ret = read(proc->fd, proc->buffer + proc->buffer_length,
686
		 BUFFER_SIZE);
687
      if(ret < 0){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
688
	/* Read error from this process; ignore the error */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
689
	continue;
690
      }
691
      if(ret == 0){
692
	/* got EOF */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
693
	proc->eof = true;
694
      } else {
695
	proc->buffer_length += (size_t) ret;
13 by Björn Påhlsson
Added following support:
696
      }
697
    }
698
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
699
  if(process_list == NULL){
700
    fprintf(stderr, "All plugin processes failed, exiting\n");
701
    exitstatus = EXIT_FAILURE;
702
  }
13 by Björn Påhlsson
Added following support:
703
  
704
 end:
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
705
  /* Restore old signal handler */
706
  sigaction(SIGCHLD, &old_sigchld_action, NULL);
707
  
24.1.8 by Björn Påhlsson
plugbasedclient
708
  free(plus_argv);
709
  
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
710
  /* Free the plugin list */
711
  for(plugin *next; plugin_list != NULL; plugin_list = next){
712
    next = plugin_list->next;
713
    free(plugin_list->argv);
714
    free(plugin_list);
715
  }
716
  
717
  if(dir != NULL){
718
    closedir(dir);
719
  }
720
  
721
  /* Free the process list and kill the processes */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
722
  for(process *next; process_list != NULL; process_list = next){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
723
    next = process_list->next;
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
724
    close(process_list->fd);
24.1.26 by Björn Påhlsson
tally count of used symbols
725
    ret = kill(process_list->pid, SIGTERM);
726
    if(ret == -1 and errno != ESRCH){
727
      /* set-uid proccesses migth not get closed */
728
      perror("kill");
729
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
730
    free(process_list->buffer);
731
    free(process_list);
13 by Björn Påhlsson
Added following support:
732
  }
733
  
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
734
  /* Wait for any remaining child processes to terminate */
735
  do{
736
    ret = wait(NULL);
737
  } while(ret >= 0);
738
  if(errno != ECHILD){
739
    perror("wait");
740
  }
741
  
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
742
  return exitstatus;
13 by Björn Påhlsson
Added following support:
743
}