/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
1
/*  -*- coding: utf-8 -*- */
2
/*
237.2.24 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Fix name in header.
3
 * Splashy - Read a password from splashy and output it
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
4
 * 
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
5
 * Copyright © 2008-2010 Teddy Hogeborn
6
 * Copyright © 2008-2010 Björn Påhlsson
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
7
 * 
8
 * This program is free software: you can redistribute it and/or
9
 * modify it under the terms of the GNU General Public License as
10
 * published by the Free Software Foundation, either version 3 of the
11
 * License, or (at your option) any later version.
12
 * 
13
 * This program is distributed in the hope that it will be useful, but
14
 * WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * General Public License for more details.
17
 * 
18
 * You should have received a copy of the GNU General Public License
19
 * along with this program.  If not, see
20
 * <http://www.gnu.org/licenses/>.
21
 * 
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
22
 * Contact the authors at <mandos@fukt.bsnet.se>.
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
23
 */
24
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
25
#define _GNU_SOURCE		/* TEMP_FAILURE_RETRY(), asprintf() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
26
#include <signal.h>		/* sig_atomic_t, struct sigaction,
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
27
				   sigemptyset(), sigaddset(), SIGINT,
28
				   SIGHUP, SIGTERM, sigaction,
29
				   SIG_IGN, kill(), SIGKILL */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
30
#include <stddef.h>		/* NULL */
31
#include <stdlib.h>		/* getenv() */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
32
#include <stdio.h>		/* asprintf() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
33
#include <stdlib.h>		/* EXIT_FAILURE, free(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
34
				   EXIT_SUCCESS */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
35
#include <sys/types.h>		/* pid_t, DIR, struct dirent,
36
				   ssize_t */
37
#include <dirent.h>		/* opendir(), readdir(), closedir() */
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
38
#include <inttypes.h>		/* intmax_t, strtoimax() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
39
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
40
#include <iso646.h>		/* not, or, and */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
41
#include <unistd.h>		/* readlink(), fork(), execl(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
42
				   sleep(), dup2() STDERR_FILENO,
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
43
				   STDOUT_FILENO, _exit(),
44
				   pause() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
45
#include <string.h>		/* memcmp() */
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
46
#include <errno.h>		/* errno, EACCES, ENOTDIR, ELOOP,
47
				   ENOENT, ENAMETOOLONG, EMFILE,
48
				   ENFILE, ENOMEM, ENOEXEC, EINVAL,
49
				   E2BIG, EFAULT, EIO, ETXTBSY,
50
				   EISDIR, ELIBBAD, EPERM, EINTR,
51
				   ECHILD */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
52
#include <error.h>		/* error() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
53
#include <sys/wait.h>		/* waitpid(), WIFEXITED(),
54
				   WEXITSTATUS() */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
55
#include <sysexits.h>		/* EX_OSERR, EX_OSFILE,
56
				   EX_UNAVAILABLE */
57
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
58
sig_atomic_t interrupted_by_signal = 0;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
59
int signal_received;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
60
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
61
static void termination_handler(int signum){
62
  if(interrupted_by_signal){
63
    return;
64
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
65
  interrupted_by_signal = 1;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
66
  signal_received = signum;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
67
}
68
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
69
int main(__attribute__((unused))int argc,
70
	 __attribute__((unused))char **argv){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
71
  int ret = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
72
  char *prompt = NULL;
73
  DIR *proc_dir = NULL;
74
  pid_t splashy_pid = 0;
75
  pid_t splashy_command_pid = 0;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
76
  int exitstatus = EXIT_FAILURE;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
77
  
78
  /* Create prompt string */
79
  {
80
    const char *const cryptsource = getenv("cryptsource");
81
    const char *const crypttarget = getenv("crypttarget");
82
    const char *const prompt_start = "getpass "
83
      "Enter passphrase to unlock the disk";
84
    
85
    if(cryptsource == NULL){
86
      if(crypttarget == NULL){
87
	ret = asprintf(&prompt, "%s: ", prompt_start);
88
      } else {
89
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
90
		       crypttarget);
91
      }
92
    } else {
93
      if(crypttarget == NULL){
94
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
95
      } else {
96
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
97
		       cryptsource, crypttarget);
98
      }
99
    }
100
    if(ret == -1){
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
101
      prompt = NULL;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
102
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
103
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
104
    }
105
  }
106
  
107
  /* Find splashy process */
108
  {
109
    const char splashy_name[] = "/sbin/splashy";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
110
    proc_dir = opendir("/proc");
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
111
    if(proc_dir == NULL){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
112
      int e = errno;
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
113
      error(0, errno, "opendir");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
114
      switch(e){
115
      case EACCES:
116
      case ENOTDIR:
117
      case ELOOP:
118
      case ENOENT:
119
      default:
120
	exitstatus = EX_OSFILE;
121
	break;
122
      case ENAMETOOLONG:
123
      case EMFILE:
124
      case ENFILE:
125
      case ENOMEM:
126
	exitstatus = EX_OSERR;
127
	break;
128
      }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
129
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
130
    }
131
    for(struct dirent *proc_ent = readdir(proc_dir);
132
	proc_ent != NULL;
133
	proc_ent = readdir(proc_dir)){
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
134
      pid_t pid;
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
135
      {
136
	intmax_t tmpmax;
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
137
	char *tmp;
138
	errno = 0;
139
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
140
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
141
	   or tmpmax != (pid_t)tmpmax){
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
142
	  /* Not a process */
143
	  continue;
144
	}
145
	pid = (pid_t)tmpmax;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
146
      }
147
      /* Find the executable name by doing readlink() on the
148
	 /proc/<pid>/exe link */
149
      char exe_target[sizeof(splashy_name)];
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
150
      ssize_t sret;
151
      {
152
	char *exe_link;
153
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
154
	if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
155
	  error(0, errno, "asprintf");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
156
	  exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
157
	  goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
158
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
159
	
160
	/* Check that it refers to a symlink owned by root:root */
161
	struct stat exe_stat;
162
	ret = lstat(exe_link, &exe_stat);
163
	if(ret == -1){
237.2.25 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
164
	  if(errno == ENOENT){
165
	    free(exe_link);
166
	    continue;
167
	  }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
168
	  int e = errno;
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
169
	  error(0, errno, "lstat");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
170
	  free(exe_link);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
171
	  switch(e){
172
	  case EACCES:
173
	  case ENOTDIR:
174
	  case ELOOP:
175
	  default:
176
	    exitstatus = EX_OSFILE;
177
	    break;
178
	  case ENAMETOOLONG:
179
	    exitstatus = EX_OSERR;
180
	    break;
181
	  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
182
	  goto failure;
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
183
	}
184
	if(not S_ISLNK(exe_stat.st_mode)
185
	   or exe_stat.st_uid != 0
186
	   or exe_stat.st_gid != 0){
187
	  free(exe_link);
188
	  continue;
189
	}
190
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
191
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
192
	free(exe_link);
193
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
194
      if((sret == ((ssize_t)sizeof(exe_target)-1))
195
	 and (memcmp(splashy_name, exe_target,
196
		     sizeof(exe_target)-1) == 0)){
197
	splashy_pid = pid;
198
	break;
199
      }
200
    }
201
    closedir(proc_dir);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
202
    proc_dir = NULL;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
203
  }
204
  if(splashy_pid == 0){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
205
    exitstatus = EX_UNAVAILABLE;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
206
    goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
207
  }
208
  
209
  /* Set up the signal handler */
210
  {
211
    struct sigaction old_action,
212
      new_action = { .sa_handler = termination_handler,
213
		     .sa_flags = 0 };
214
    sigemptyset(&new_action.sa_mask);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
215
    ret = sigaddset(&new_action.sa_mask, SIGINT);
216
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
217
      error(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
218
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
219
      goto failure;
220
    }
221
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
222
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
223
      error(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
224
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
225
      goto failure;
226
    }
227
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
228
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
229
      error(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
230
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
231
      goto failure;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
232
    }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
233
    ret = sigaction(SIGINT, NULL, &old_action);
234
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
235
      error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
236
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
237
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
238
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
239
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
240
      ret = sigaction(SIGINT, &new_action, NULL);
241
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
242
	error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
243
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
244
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
245
      }
246
    }
247
    ret = sigaction(SIGHUP, NULL, &old_action);
248
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
249
      error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
250
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
251
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
252
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
253
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
254
      ret = sigaction(SIGHUP, &new_action, NULL);
255
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
256
	error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
257
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
258
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
259
      }
260
    }
261
    ret = sigaction(SIGTERM, NULL, &old_action);
262
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
263
      error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
264
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
265
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
266
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
267
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
268
      ret = sigaction(SIGTERM, &new_action, NULL);
269
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
270
	error(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
271
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
272
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
273
      }
274
    }
275
  }
276
  
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
277
  if(interrupted_by_signal){
278
    goto failure;
279
  }
280
  
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
281
  /* Fork off the splashy command to prompt for password */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
282
  splashy_command_pid = fork();
283
  if(splashy_command_pid != 0 and interrupted_by_signal){
284
    goto failure;
285
  }
286
  if(splashy_command_pid == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
287
    error(0, errno, "fork");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
288
    exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
289
    goto failure;
290
  }
291
  /* Child */
292
  if(splashy_command_pid == 0){
293
    if(not interrupted_by_signal){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
294
      const char splashy_command[] = "/sbin/splashy_update";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
295
      execl(splashy_command, splashy_command, prompt, (char *)NULL);
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
296
      int e = errno;
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
297
      error(0, errno, "execl");
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
298
      switch(e){
299
      case EACCES:
300
      case ENOENT:
301
      case ENOEXEC:
302
      case EINVAL:
303
	_exit(EX_UNAVAILABLE);
304
      case ENAMETOOLONG:
305
      case E2BIG:
306
      case ENOMEM:
307
      case EFAULT:
308
      case EIO:
309
      case EMFILE:
310
      case ENFILE:
311
      case ETXTBSY:
312
      default:
313
	_exit(EX_OSERR);
314
      case ENOTDIR:
315
      case ELOOP:
316
      case EISDIR:
317
      case ELIBBAD:
318
      case EPERM:
319
	_exit(EX_OSFILE);
320
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
321
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
322
    free(prompt);
323
    _exit(EXIT_FAILURE);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
324
  }
325
  
326
  /* Parent */
327
  free(prompt);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
328
  prompt = NULL;
329
  
330
  if(interrupted_by_signal){
331
    goto failure;
332
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
333
  
334
  /* Wait for command to complete */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
335
  {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
336
    int status;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
337
    do {
338
      ret = waitpid(splashy_command_pid, &status, 0);
339
    } while(ret == -1 and errno == EINTR
340
	    and not interrupted_by_signal);
341
    if(interrupted_by_signal){
342
      goto failure;
343
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
344
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
345
      error(0, errno, "waitpid");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
346
      if(errno == ECHILD){
347
	splashy_command_pid = 0;
348
      }
349
    } else {
350
      /* The child process has exited */
351
      splashy_command_pid = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
352
      if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
353
	return EXIT_SUCCESS;
354
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
355
    }
356
  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
357
  
358
 failure:
359
  
360
  free(prompt);
361
  
362
  if(proc_dir != NULL){
363
    TEMP_FAILURE_RETRY(closedir(proc_dir));
364
  }
365
  
366
  if(splashy_command_pid != 0){
367
    TEMP_FAILURE_RETRY(kill(splashy_command_pid, SIGTERM));
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
368
    
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
369
    TEMP_FAILURE_RETRY(kill(splashy_pid, SIGTERM));
370
    sleep(2);
371
    while(TEMP_FAILURE_RETRY(kill(splashy_pid, 0)) == 0){
372
      TEMP_FAILURE_RETRY(kill(splashy_pid, SIGKILL));
373
      sleep(1);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
374
    }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
375
    pid_t new_splashy_pid = (pid_t)TEMP_FAILURE_RETRY(fork());
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
376
    if(new_splashy_pid == 0){
377
      /* Child; will become new splashy process */
378
      
379
      /* Make the effective user ID (root) the only user ID instead of
380
	 the real user ID (_mandos) */
381
      ret = setuid(geteuid());
382
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
383
	error(0, errno, "setuid");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
384
      }
385
      
386
      setsid();
387
      ret = chdir("/");
388
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
389
	error(0, errno, "chdir");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
390
      }
391
/*       if(fork() != 0){ */
392
/* 	_exit(EXIT_SUCCESS); */
393
/*       } */
394
      ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
395
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
396
	error(0, errno, "dup2");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
397
	_exit(EX_OSERR);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
398
      }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
399
      
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
400
      execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
401
      {
402
	int e = errno;
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
403
	error(0, errno, "execl");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
404
	switch(e){
405
	case EACCES:
406
	case ENOENT:
407
	case ENOEXEC:
408
	default:
409
	  _exit(EX_UNAVAILABLE);
410
	case ENAMETOOLONG:
411
	case E2BIG:
412
	case ENOMEM:
413
	  _exit(EX_OSERR);
414
	case ENOTDIR:
415
	case ELOOP:
416
	  _exit(EX_OSFILE);
417
	}
418
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
419
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
420
  }
421
  
422
  if(interrupted_by_signal){
423
    struct sigaction signal_action;
424
    sigemptyset(&signal_action.sa_mask);
425
    signal_action.sa_handler = SIG_DFL;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
426
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
427
					    &signal_action, NULL));
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
428
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
429
      error(0, errno, "sigaction");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
430
    }
431
    do {
432
      ret = raise(signal_received);
433
    } while(ret != 0 and errno == EINTR);
434
    if(ret != 0){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
435
      error(0, errno, "raise");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
436
      abort();
437
    }
438
    TEMP_FAILURE_RETRY(pause());
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
439
  }
440
  
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
441
  return exitstatus;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
442
}