/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
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
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
26
#include <stdio.h>		/* popen(), fileno(), fprintf(),
27
				   stderr, STDOUT_FILENO */
28
#include <iso646.h>		/* and, or, not */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
29
#include <sys/types.h>	        /* DIR, opendir(), stat(),
30
				   struct stat, waitpid(),
31
				   WIFEXITED(), WEXITSTATUS(),
32
				   wait() */
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
33
#include <sys/wait.h>		/* wait() */
34
#include <dirent.h>		/* DIR, struct dirent, opendir(),
35
				   readdir(), closedir() */
36
#include <sys/stat.h>		/* struct stat, stat(), S_ISREG() */
37
#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
#include <errno.h>		/* errno */
49
#include <argp.h>		/* struct argp_option,
50
				   struct argp_state, struct argp,
51
				   argp_parse() */
13 by Björn Påhlsson
Added following support:
52
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
53
#define BUFFER_SIZE 256
54
13 by Björn Påhlsson
Added following support:
55
struct process;
56
57
typedef struct process{
58
  pid_t pid;
59
  int fd;
60
  char *buffer;
21 by Teddy Hogeborn
* Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and
61
  size_t buffer_size;
62
  size_t buffer_length;
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
63
  bool eof;
64
  bool completed;
65
  int status;
13 by Björn Påhlsson
Added following support:
66
  struct process *next;
67
} process;
68
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
69
typedef struct plugin{
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
70
  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
71
  char **argv;
72
  int argc;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
73
  bool disabled;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
74
  struct plugin *next;
75
} plugin;
76
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
77
static plugin *getplugin(char *name, plugin **plugin_list){
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
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))){
81
      return p;
82
    }
83
  }
84
  /* 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;
97
  new_plugin->argv[1] = NULL;
98
  new_plugin->argc = 1;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
99
  new_plugin->disabled = false;
24.1.5 by Björn Påhlsson
plugbasedclient:
100
  new_plugin->next = *plugin_list;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
101
  /* Append the new plugin to the list */
102
  *plugin_list = new_plugin;
103
  return new_plugin;
104
}
105
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
106
static void addargument(plugin *p, char *arg){
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
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;
115
}
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
116
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
117
/*
118
 * Based on the example in the GNU LibC manual chapter 13.13 "File
119
 * Descriptor Flags".
120
 * *Note File Descriptor Flags:(libc)Descriptor Flags.
121
 */
37 by Teddy Hogeborn
Non-tested commit for merge purposes.
122
static int set_cloexec_flag(int fd)
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
123
{
124
  int ret = fcntl(fd, F_GETFD, 0);
125
  /* If reading the flags failed, return error indication now. */
126
  if(ret < 0){
127
    return ret;
128
  }
129
  /* Store modified flag word in the descriptor. */
130
  return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
131
}
132
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
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
139
   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;
153
}
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
154
13 by Björn Påhlsson
Added following support:
155
int main(int argc, char *argv[]){
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
156
  const char *plugindir = "/conf/conf.d/mandos/plugins.d";
24.1.5 by Björn Påhlsson
plugbasedclient:
157
  size_t d_name_len;
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
158
  DIR *dir = NULL;
13 by Björn Påhlsson
Added following support:
159
  struct dirent *dirst;
160
  struct stat st;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
161
  fd_set rfds_all;
13 by Björn Påhlsson
Added following support:
162
  int ret, maxfd = 0;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
163
  bool debug = false;
164
  int exitstatus = EXIT_SUCCESS;
165
  
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
166
  /* Establish a signal handler */
167
  struct sigaction old_sigchld_action,
168
    sigchld_action = { .sa_handler = handle_sigchld,
169
		       .sa_flags = SA_NOCLDSTOP };
170
  sigemptyset(&sigchld_action.sa_mask);
171
  ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
172
  if(ret < 0){
173
    perror("sigaddset");
174
    exit(EXIT_FAILURE);
175
  }
176
  ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
177
  if(ret < 0){
178
    perror("sigaction");
179
    exit(EXIT_FAILURE);
180
  }
181
  
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
182
  /* The options we understand. */
183
  struct argp_option options[] = {
184
    { .name = "global-options", .key = 'g',
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
185
      .arg = "OPTION[,OPTION[,...]]",
186
      .doc = "Options passed to all plugins" },
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
187
    { .name = "options-for", .key = 'o',
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
188
      .arg = "PLUGIN:OPTION[,OPTION[,...]]",
189
      .doc = "Options passed only to specified plugin" },
190
    { .name = "disable", .key = 'd',
191
      .arg = "PLUGIN",
192
      .doc = "Disable a specific plugin", .group = 1 },
24.1.5 by Björn Påhlsson
plugbasedclient:
193
    { .name = "plugin-dir", .key = 128,
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
194
      .arg = "DIRECTORY",
195
      .doc = "Specify a different plugin directory", .group = 2 },
196
    { .name = "debug", .key = 129,
197
      .doc = "Debug mode", .group = 3 },
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
198
    { .name = NULL }
199
  };
200
  
201
  error_t parse_opt (int key, char *arg, struct argp_state *state) {
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
202
    /* Get the INPUT argument from `argp_parse', which we know is a
203
       pointer to our plugin list pointer. */
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
204
    plugin **plugins = state->input;
205
    switch (key) {
206
    case 'g':
207
      if (arg != NULL){
208
	char *p = strtok(arg, ",");
209
	do{
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
210
	  addargument(getplugin(NULL, plugins), p);
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
211
	  p = strtok(NULL, ",");
212
	} while (p);
213
      }
214
      break;
215
    case 'o':
216
      if (arg != NULL){
217
	char *name = strtok(arg, ":");
218
	char *p = strtok(NULL, ":");
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
219
	if(p){
220
	  p = strtok(p, ",");
221
	  do{
222
	    addargument(getplugin(name, plugins), p);
223
	    p = strtok(NULL, ",");
224
	  } while (p);
225
	}
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
226
      }
227
      break;
24.1.5 by Björn Påhlsson
plugbasedclient:
228
    case 'd':
229
      if (arg != NULL){
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
230
	getplugin(arg, plugins)->disabled = true;
24.1.5 by Björn Påhlsson
plugbasedclient:
231
      }
232
      break;
233
    case 128:
234
      plugindir = arg;
235
      break;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
236
    case 129:
237
      debug = true;
238
      break;
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
239
    case ARGP_KEY_ARG:
240
      argp_usage (state);
241
      break;
242
    case ARGP_KEY_END:
243
      break;
244
    default:
245
      return ARGP_ERR_UNKNOWN;
246
    }
247
    return 0;
248
  }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
249
  
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
250
  plugin *plugin_list = NULL;
251
  
252
  struct argp argp = { .options = options, .parser = parse_opt,
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
253
		       .args_doc = "",
254
		       .doc = "Mandos plugin runner -- Run plugins" };
255
  
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
256
  argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
257
  
258
  if(debug){
259
    for(plugin *p = plugin_list; p != NULL; p=p->next){
260
      fprintf(stderr, "Plugin: %s has %d arguments\n",
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
261
	      p->name ? p->name : "Global", p->argc - 1);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
262
      for(char **a = p->argv; *a != NULL; a++){
263
	fprintf(stderr, "\tArg: %s\n", *a);
264
      }
265
    }
266
  }
267
  
13 by Björn Påhlsson
Added following support:
268
  dir = opendir(plugindir);
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
269
  if(dir == NULL){
270
    perror("Could not open plugin dir");
271
    exitstatus = EXIT_FAILURE;
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
272
    goto end;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
273
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
274
  
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
275
  /* Set the FD_CLOEXEC flag on the directory, if possible */
276
  {
277
    int dir_fd = dirfd(dir);
278
    if(dir_fd >= 0){
279
      ret = set_cloexec_flag(dir_fd);
280
      if(ret < 0){
281
	perror("set_cloexec_flag");
282
	exitstatus = EXIT_FAILURE;
283
	goto end;
284
      }
285
    }
286
  }
24.1.1 by Björn Påhlsson
Added syntax and support for plugbasedclient arguments and how they
287
  
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
288
  FD_ZERO(&rfds_all);
13 by Björn Påhlsson
Added following support:
289
  
290
  while(true){
291
    dirst = readdir(dir);
292
    
293
    // All directory entries have been processed
294
    if(dirst == NULL){
295
      break;
296
    }
297
    
298
    d_name_len = strlen(dirst->d_name);
299
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
300
    // Ignore dotfiles, backup files and other junk
301
    {
302
      bool bad_name = false;
303
      
304
      const char const *bad_prefixes[] = { ".", "#", NULL };
305
      
306
      const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
307
					   ".dpkg-old",
308
					   ".dpkg-divert", NULL };
309
      for(const char **pre = bad_prefixes; *pre != NULL; pre++){
310
	size_t pre_len = strlen(*pre);
311
	if((d_name_len >= pre_len)
312
	   and strncmp((dirst->d_name), *pre, pre_len) == 0){
313
	  if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
314
	    fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
315
		    " with bad prefix %s\n", dirst->d_name, *pre);
316
	  }
317
	  bad_name = true;
318
	  break;
319
	}
320
      }
321
      
322
      if(bad_name){
323
	continue;
324
      }
325
      
326
      for(const char **suf = bad_suffixes; *suf != NULL; suf++){
327
	size_t suf_len = strlen(*suf);
328
	if((d_name_len >= suf_len)
329
	   and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
330
		== 0)){
331
	  if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
332
	    fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
333
		    " with bad suffix %s\n", dirst->d_name, *suf);
334
	  }
335
	  bad_name = true;
336
	  break;
337
	}
338
      }
339
      
340
      if(bad_name){
341
	continue;
342
      }
13 by Björn Påhlsson
Added following support:
343
    }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
344
    
24.1.5 by Björn Påhlsson
plugbasedclient:
345
    char *filename = malloc(d_name_len + strlen(plugindir) + 2);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
346
    if (filename == NULL){
347
      perror("malloc");
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
348
      exitstatus = EXIT_FAILURE;
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
349
      goto end;
350
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
351
    strcpy(filename, plugindir); /* Spurious warning */
352
    strcat(filename, "/");	/* Spurious warning */
353
    strcat(filename, dirst->d_name); /* Spurious warning */
354
    
13 by Björn Påhlsson
Added following support:
355
    stat(filename, &st);
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
356
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
357
    if (not S_ISREG(st.st_mode)	or (access(filename, X_OK) != 0)){
358
      if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
359
	fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
360
		" with bad type or mode\n", filename);
361
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
362
      free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
363
      continue;
364
    }
365
    if(getplugin(dirst->d_name, &plugin_list)->disabled){
366
      if(debug){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
367
	fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
368
		dirst->d_name);
369
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
370
      free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
371
      continue;
372
    }
32 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (set_cloexec_flag): New function.
373
    plugin *p = getplugin(dirst->d_name, &plugin_list);
374
    {
375
      /* Add global arguments to argument list for this plugin */
376
      plugin *g = getplugin(NULL, &plugin_list);
377
      for(char **a = g->argv + 1; *a != NULL; a++){
378
	addargument(p, *a);
379
      }
380
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
381
    int pipefd[2]; 
382
    ret = pipe(pipefd);
383
    if (ret == -1){
384
      perror("pipe");
385
      exitstatus = EXIT_FAILURE;
386
      goto end;
387
    }
388
    ret = set_cloexec_flag(pipefd[0]);
389
    if(ret < 0){
390
      perror("set_cloexec_flag");
391
      exitstatus = EXIT_FAILURE;
392
      goto end;
393
    }
394
    ret = set_cloexec_flag(pipefd[1]);
395
    if(ret < 0){
396
      perror("set_cloexec_flag");
397
      exitstatus = EXIT_FAILURE;
398
      goto end;
399
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
400
    /* Block SIGCHLD until process is safely in process list */
401
    ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
402
    if(ret < 0){
403
      perror("sigprocmask");
404
      exitstatus = EXIT_FAILURE;
405
      goto end;
406
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
407
    // Starting a new process to be watched
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
408
    pid_t pid = fork();
409
    if(pid == 0){
410
      /* this is the child process */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
411
      ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
412
      if(ret < 0){
413
	perror("sigaction");
414
	_exit(EXIT_FAILURE);
415
      }
416
      ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
417
      if(ret < 0){
418
	perror("sigprocmask");
419
	_exit(EXIT_FAILURE);
420
      }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
421
      dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
422
      
423
      if(dirfd(dir) < 0){
424
	/* If dir has no file descriptor, we could not set FD_CLOEXEC
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
425
	   above and must now close it manually here. */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
426
	closedir(dir);
33 by Teddy Hogeborn
* plugins.d/plugbasedclient.c (main): Close the pipe fd after dup2:ing
427
      }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
428
      if(execv(filename, p->argv) < 0){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
429
	perror("execv");
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
430
	_exit(EXIT_FAILURE);
431
      }
432
      /* no return */
433
    }
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
434
    /* parent process */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
435
    free(filename);
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
436
    close(pipefd[1]);		/* close unused write end of pipe */
437
    process *new_process = malloc(sizeof(process));
438
    if (new_process == NULL){
439
      perror("malloc");
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
440
      ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
441
      if(ret < 0){
442
	perror("sigprocmask");
443
      }
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
444
      exitstatus = EXIT_FAILURE;
445
      goto end;
446
    }
447
    
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
448
    *new_process = (struct process){ .pid = pid,
449
				     .fd = pipefd[0],
450
				     .next = process_list };
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
451
    // List handling
452
    process_list = new_process;
453
    /* Unblock SIGCHLD so signal handler can be run if this process
454
       has already completed */
455
    ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
456
    if(ret < 0){
457
      perror("sigprocmask");
458
      exitstatus = EXIT_FAILURE;
459
      goto end;
460
    }
461
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
462
    FD_SET(new_process->fd, &rfds_all);
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
463
    
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
464
    if (maxfd < new_process->fd){
465
      maxfd = new_process->fd;
466
    }
467
    
13 by Björn Påhlsson
Added following support:
468
  }
469
  
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
470
  /* Free the plugin list */
471
  for(plugin *next; plugin_list != NULL; plugin_list = next){
472
    next = plugin_list->next;
473
    free(plugin_list->argv);
474
    free(plugin_list);
475
  }
476
  
13 by Björn Påhlsson
Added following support:
477
  closedir(dir);
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
478
  dir = NULL;
13 by Björn Påhlsson
Added following support:
479
  
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
480
  if (process_list == NULL){
481
    fprintf(stderr, "No plugin processes started, exiting\n");
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
482
    exitstatus = EXIT_FAILURE;
483
    goto end;
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
484
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
485
  while(process_list){
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
486
    fd_set rfds = rfds_all;
487
    int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
488
    if (select_ret == -1){
489
      perror("select");
490
      exitstatus = EXIT_FAILURE;
491
      goto end;
492
    }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
493
    /* OK, now either a process completed, or something can be read
494
       from one of them */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
495
    for(process *proc = process_list; proc ; proc = proc->next){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
496
      /* Is this process completely done? */
497
      if(proc->eof and proc->completed){
498
	/* Only accept the plugin output if it exited cleanly */
499
	if(not WIFEXITED(proc->status)
500
	   or WEXITSTATUS(proc->status) != 0){
501
	  /* Bad exit by plugin */
502
	  if(debug){
503
	    if(WIFEXITED(proc->status)){
504
	      fprintf(stderr, "Plugin %d exited with status %d\n",
505
		      proc->pid, WEXITSTATUS(proc->status));
506
	    } else if(WIFSIGNALED(proc->status)) {
507
	      fprintf(stderr, "Plugin %d killed by signal %d\n",
508
		      proc->pid, WTERMSIG(proc->status));
509
	    } else if(WCOREDUMP(proc->status)){
510
	      fprintf(stderr, "Plugin %d dumped core\n", proc->pid);
511
	    }
512
	  }
513
	  /* Remove the plugin */
514
	  FD_CLR(proc->fd, &rfds_all);
515
	  /* Block signal while modifying process_list */
516
	  ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
517
	  if(ret < 0){
518
	    perror("sigprocmask");
519
	    exitstatus = EXIT_FAILURE;
520
	    goto end;
521
	  }
522
	  /* Delete this process entry from the list */
523
	  if(process_list == proc){
524
	    /* First one - simple */
525
	    process_list = proc->next;
526
	  } else {
527
	    /* Second one or later */
528
	    for(process *p = process_list; p != NULL; p = p->next){
529
	      if(p->next == proc){
530
		p->next = proc->next;
531
		break;
532
	      }
533
	    }
534
	  }
535
	  /* We are done modifying process list, so unblock signal */
536
	  ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
537
			     NULL);
538
	  if(ret < 0){
539
	    perror("sigprocmask");
540
	  }
541
	  free(proc->buffer);
542
	  free(proc);
543
	  /* We deleted this process from the list, so we can't go
544
	     proc->next.  Therefore, start over from the beginning of
545
	     the process list */
546
	  break;
547
	}
548
	/* This process exited nicely, so print its buffer */
549
	for(size_t written = 0; written < proc->buffer_length;
550
	    written += (size_t)ret){
551
	  ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO,
552
					 proc->buffer + written,
553
					 proc->buffer_length
554
					 - written));
555
	  if(ret < 0){
556
	    perror("write");
557
	    exitstatus = EXIT_FAILURE;
558
	    goto end;
559
	  }
560
	}
561
	goto end;
562
      }
563
      /* This process has not completed.  Does it have any output? */
564
      if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
565
	/* This process had nothing to say at this time */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
566
	continue;
567
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
568
      /* Before reading, make the process' data buffer large enough */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
569
      if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
570
	proc->buffer = realloc(proc->buffer, proc->buffer_size
571
			       + (size_t) BUFFER_SIZE);
572
	if (proc->buffer == NULL){
573
	  perror("malloc");
574
	  exitstatus = EXIT_FAILURE;
575
	  goto end;
576
	}
577
	proc->buffer_size += BUFFER_SIZE;
578
      }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
579
      /* Read from the process */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
580
      ret = read(proc->fd, proc->buffer + proc->buffer_length,
581
		 BUFFER_SIZE);
582
      if(ret < 0){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
583
	/* Read error from this process; ignore the error */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
584
	continue;
585
      }
586
      if(ret == 0){
587
	/* got EOF */
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
588
	proc->eof = true;
589
      } else {
590
	proc->buffer_length += (size_t) ret;
13 by Björn Påhlsson
Added following support:
591
      }
592
    }
593
  }
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
594
  if(process_list == NULL){
595
    fprintf(stderr, "All plugin processes failed, exiting\n");
596
    exitstatus = EXIT_FAILURE;
597
  }
13 by Björn Påhlsson
Added following support:
598
  
599
 end:
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
600
  /* Restore old signal handler */
601
  sigaction(SIGCHLD, &old_sigchld_action, NULL);
602
  
603
  /* Free the plugin list */
604
  for(plugin *next; plugin_list != NULL; plugin_list = next){
605
    next = plugin_list->next;
606
    free(plugin_list->argv);
607
    free(plugin_list);
608
  }
609
  
610
  if(dir != NULL){
611
    closedir(dir);
612
  }
613
  
614
  /* Free the process list and kill the processes */
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
615
  for(process *next; process_list != NULL; process_list = next){
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
616
    next = process_list->next;
34 by Teddy Hogeborn
* plugbasedclient.c (main): Check if plugin dir could be opened. Set
617
    close(process_list->fd);
618
    kill(process_list->pid, SIGTERM);
619
    free(process_list->buffer);
620
    free(process_list);
13 by Björn Påhlsson
Added following support:
621
  }
622
  
35 by Teddy Hogeborn
* plugbasedclient.c (struct process): New fields "eof", "completed",
623
  /* Wait for any remaining child processes to terminate */
624
  do{
625
    ret = wait(NULL);
626
  } while(ret >= 0);
627
  if(errno != ECHILD){
628
    perror("wait");
629
  }
630
  
31 by Teddy Hogeborn
* plugins.d/plugbasedclient.c: Update include file comments.
631
  return exitstatus;
13 by Björn Påhlsson
Added following support:
632
}