/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
1
/*  -*- coding: utf-8 -*- */
2
/*
261 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
 * 
466 by Teddy Hogeborn
Update copyright year to "2011" wherever appropriate.
5
 * Copyright © 2008-2011 Teddy Hogeborn
6
 * Copyright © 2008-2011 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
 * 
363 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
363 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() */
485 by Teddy Hogeborn
Merge from Björn.
32
#include <stdio.h>		/* asprintf(), vasprintf(), vprintf(),
33
				   fprintf() */
264 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
34
#include <stdlib.h>		/* EXIT_FAILURE, free(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
35
				   EXIT_SUCCESS */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
36
#include <sys/types.h>		/* pid_t, DIR, struct dirent,
37
				   ssize_t */
38
#include <dirent.h>		/* opendir(), readdir(), closedir() */
311 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
39
#include <inttypes.h>		/* intmax_t, strtoimax() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
40
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
41
#include <iso646.h>		/* not, or, and */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
42
#include <unistd.h>		/* readlink(), fork(), execl(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
43
				   sleep(), dup2() STDERR_FILENO,
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
44
				   STDOUT_FILENO, _exit(),
45
				   pause() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
46
#include <string.h>		/* memcmp(), strerror() */
390 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
47
#include <errno.h>		/* errno, EACCES, ENOTDIR, ELOOP,
48
				   ENOENT, ENAMETOOLONG, EMFILE,
49
				   ENFILE, ENOMEM, ENOEXEC, EINVAL,
50
				   E2BIG, EFAULT, EIO, ETXTBSY,
51
				   EISDIR, ELIBBAD, EPERM, EINTR,
52
				   ECHILD */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
53
#include <error.h>		/* error() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
54
#include <sys/wait.h>		/* waitpid(), WIFEXITED(),
55
				   WEXITSTATUS() */
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
56
#include <sysexits.h>		/* EX_OSERR, EX_OSFILE,
57
				   EX_UNAVAILABLE */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
58
#include <stdarg.h>		/* va_list, va_start(), ... */
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
59
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
60
sig_atomic_t interrupted_by_signal = 0;
362 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
61
int signal_received;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
62
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
63
/* Function to use when printing errors */
485 by Teddy Hogeborn
Merge from Björn.
64
void error_plus(int status, int errnum, const char *formatstring,
65
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
66
  va_list ap;
67
  char *text;
68
  int ret;
69
  
70
  va_start(ap, formatstring);
71
  ret = vasprintf(&text, formatstring, ap);
72
  if (ret == -1){
485 by Teddy Hogeborn
Merge from Björn.
73
    fprintf(stderr, "Mandos plugin %s: ",
74
	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
75
    vfprintf(stderr, formatstring, ap);
76
    fprintf(stderr, ": ");
77
    fprintf(stderr, "%s\n", strerror(errnum));
78
    error(status, errno, "vasprintf while printing error");
79
    return;
80
  }
81
  fprintf(stderr, "Mandos plugin ");
82
  error(status, errnum, "%s", text);
83
  free(text);
84
}
85
86
362 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
87
static void termination_handler(int signum){
88
  if(interrupted_by_signal){
89
    return;
90
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
91
  interrupted_by_signal = 1;
362 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
92
  signal_received = signum;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
93
}
94
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
95
int main(__attribute__((unused))int argc,
96
	 __attribute__((unused))char **argv){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
97
  int ret = 0;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
98
  char *prompt = NULL;
99
  DIR *proc_dir = NULL;
100
  pid_t splashy_pid = 0;
101
  pid_t splashy_command_pid = 0;
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
102
  int exitstatus = EXIT_FAILURE;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
103
  
104
  /* Create prompt string */
105
  {
106
    const char *const cryptsource = getenv("cryptsource");
107
    const char *const crypttarget = getenv("crypttarget");
108
    const char *const prompt_start = "getpass "
109
      "Enter passphrase to unlock the disk";
110
    
111
    if(cryptsource == NULL){
112
      if(crypttarget == NULL){
113
	ret = asprintf(&prompt, "%s: ", prompt_start);
114
      } else {
115
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
116
		       crypttarget);
117
      }
118
    } else {
119
      if(crypttarget == NULL){
120
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
121
      } else {
122
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
123
		       cryptsource, crypttarget);
124
      }
125
    }
126
    if(ret == -1){
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
127
      prompt = NULL;
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
128
      exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
129
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
130
    }
131
  }
132
  
133
  /* Find splashy process */
134
  {
135
    const char splashy_name[] = "/sbin/splashy";
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
136
    proc_dir = opendir("/proc");
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
137
    if(proc_dir == NULL){
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
138
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
139
      error_plus(0, errno, "opendir");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
140
      switch(e){
141
      case EACCES:
142
      case ENOTDIR:
143
      case ELOOP:
144
      case ENOENT:
145
      default:
146
	exitstatus = EX_OSFILE;
147
	break;
148
      case ENAMETOOLONG:
149
      case EMFILE:
150
      case ENFILE:
151
      case ENOMEM:
152
	exitstatus = EX_OSERR;
153
	break;
154
      }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
155
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
156
    }
157
    for(struct dirent *proc_ent = readdir(proc_dir);
158
	proc_ent != NULL;
159
	proc_ent = readdir(proc_dir)){
264 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
160
      pid_t pid;
268 by Teddy Hogeborn
Fixes for sscanf usage:
161
      {
162
	intmax_t tmpmax;
311 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
163
	char *tmp;
164
	errno = 0;
165
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
166
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
167
	   or tmpmax != (pid_t)tmpmax){
268 by Teddy Hogeborn
Fixes for sscanf usage:
168
	  /* Not a process */
169
	  continue;
170
	}
171
	pid = (pid_t)tmpmax;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
172
      }
173
      /* Find the executable name by doing readlink() on the
174
	 /proc/<pid>/exe link */
175
      char exe_target[sizeof(splashy_name)];
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
176
      ssize_t sret;
177
      {
178
	char *exe_link;
179
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
180
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
181
	  error_plus(0, errno, "asprintf");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
182
	  exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
183
	  goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
184
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
185
	
186
	/* Check that it refers to a symlink owned by root:root */
187
	struct stat exe_stat;
188
	ret = lstat(exe_link, &exe_stat);
189
	if(ret == -1){
262 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
190
	  if(errno == ENOENT){
191
	    free(exe_link);
192
	    continue;
193
	  }
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
194
	  int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
195
	  error_plus(0, errno, "lstat");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
196
	  free(exe_link);
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
197
	  switch(e){
198
	  case EACCES:
199
	  case ENOTDIR:
200
	  case ELOOP:
201
	  default:
202
	    exitstatus = EX_OSFILE;
203
	    break;
204
	  case ENAMETOOLONG:
205
	    exitstatus = EX_OSERR;
206
	    break;
207
	  }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
208
	  goto failure;
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
209
	}
210
	if(not S_ISLNK(exe_stat.st_mode)
211
	   or exe_stat.st_uid != 0
212
	   or exe_stat.st_gid != 0){
213
	  free(exe_link);
214
	  continue;
215
	}
216
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
217
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
218
	free(exe_link);
219
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
220
      if((sret == ((ssize_t)sizeof(exe_target)-1))
221
	 and (memcmp(splashy_name, exe_target,
222
		     sizeof(exe_target)-1) == 0)){
223
	splashy_pid = pid;
224
	break;
225
      }
226
    }
227
    closedir(proc_dir);
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
228
    proc_dir = NULL;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
229
  }
230
  if(splashy_pid == 0){
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
231
    exitstatus = EX_UNAVAILABLE;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
232
    goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
233
  }
234
  
235
  /* Set up the signal handler */
236
  {
237
    struct sigaction old_action,
238
      new_action = { .sa_handler = termination_handler,
239
		     .sa_flags = 0 };
240
    sigemptyset(&new_action.sa_mask);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
241
    ret = sigaddset(&new_action.sa_mask, SIGINT);
242
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
243
      error_plus(0, errno, "sigaddset");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
244
      exitstatus = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
245
      goto failure;
246
    }
247
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
248
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
249
      error_plus(0, errno, "sigaddset");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
250
      exitstatus = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
251
      goto failure;
252
    }
253
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
362 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
254
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
255
      error_plus(0, errno, "sigaddset");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
256
      exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
257
      goto failure;
362 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
258
    }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
259
    ret = sigaction(SIGINT, NULL, &old_action);
260
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
261
      error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
262
      exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
263
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
264
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
265
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
266
      ret = sigaction(SIGINT, &new_action, NULL);
267
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
268
	error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
269
	exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
270
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
271
      }
272
    }
273
    ret = sigaction(SIGHUP, NULL, &old_action);
274
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
275
      error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
276
      exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
277
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
278
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
279
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
280
      ret = sigaction(SIGHUP, &new_action, NULL);
281
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
282
	error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
283
	exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
284
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
285
      }
286
    }
287
    ret = sigaction(SIGTERM, NULL, &old_action);
288
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
289
      error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
290
      exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
291
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
292
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
293
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
294
      ret = sigaction(SIGTERM, &new_action, NULL);
295
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
296
	error_plus(0, errno, "sigaction");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
297
	exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
298
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
299
      }
300
    }
301
  }
302
  
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
303
  if(interrupted_by_signal){
304
    goto failure;
305
  }
306
  
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
307
  /* Fork off the splashy command to prompt for password */
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
308
  splashy_command_pid = fork();
309
  if(splashy_command_pid != 0 and interrupted_by_signal){
310
    goto failure;
311
  }
312
  if(splashy_command_pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
313
    error_plus(0, errno, "fork");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
314
    exitstatus = EX_OSERR;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
315
    goto failure;
316
  }
317
  /* Child */
318
  if(splashy_command_pid == 0){
319
    if(not interrupted_by_signal){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
320
      const char splashy_command[] = "/sbin/splashy_update";
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
321
      execl(splashy_command, splashy_command, prompt, (char *)NULL);
390 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
322
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
323
      error_plus(0, errno, "execl");
390 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
324
      switch(e){
325
      case EACCES:
326
      case ENOENT:
327
      case ENOEXEC:
328
      case EINVAL:
329
	_exit(EX_UNAVAILABLE);
330
      case ENAMETOOLONG:
331
      case E2BIG:
332
      case ENOMEM:
333
      case EFAULT:
334
      case EIO:
335
      case EMFILE:
336
      case ENFILE:
337
      case ETXTBSY:
338
      default:
339
	_exit(EX_OSERR);
340
      case ENOTDIR:
341
      case ELOOP:
342
      case EISDIR:
456 by Teddy Hogeborn
* plugins.d/splashy.c (main): Bug fix: Only use ELIBBAD if defined.
343
#ifdef ELIBBAD
344
      case ELIBBAD:		/* Linux only */
345
#endif
390 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
346
      case EPERM:
347
	_exit(EX_OSFILE);
348
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
349
    }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
350
    free(prompt);
351
    _exit(EXIT_FAILURE);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
352
  }
353
  
354
  /* Parent */
355
  free(prompt);
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
356
  prompt = NULL;
357
  
358
  if(interrupted_by_signal){
359
    goto failure;
360
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
361
  
362
  /* Wait for command to complete */
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
363
  {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
364
    int status;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
365
    do {
366
      ret = waitpid(splashy_command_pid, &status, 0);
367
    } while(ret == -1 and errno == EINTR
368
	    and not interrupted_by_signal);
369
    if(interrupted_by_signal){
370
      goto failure;
371
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
372
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
373
      error_plus(0, errno, "waitpid");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
374
      if(errno == ECHILD){
375
	splashy_command_pid = 0;
376
      }
377
    } else {
378
      /* The child process has exited */
379
      splashy_command_pid = 0;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
380
      if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
381
	return EXIT_SUCCESS;
382
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
383
    }
384
  }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
385
  
386
 failure:
387
  
388
  free(prompt);
389
  
390
  if(proc_dir != NULL){
391
    TEMP_FAILURE_RETRY(closedir(proc_dir));
392
  }
393
  
394
  if(splashy_command_pid != 0){
395
    TEMP_FAILURE_RETRY(kill(splashy_command_pid, SIGTERM));
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
396
    
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
397
    TEMP_FAILURE_RETRY(kill(splashy_pid, SIGTERM));
398
    sleep(2);
399
    while(TEMP_FAILURE_RETRY(kill(splashy_pid, 0)) == 0){
400
      TEMP_FAILURE_RETRY(kill(splashy_pid, SIGKILL));
401
      sleep(1);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
402
    }
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
403
    pid_t new_splashy_pid = (pid_t)TEMP_FAILURE_RETRY(fork());
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
404
    if(new_splashy_pid == 0){
405
      /* Child; will become new splashy process */
406
      
407
      /* Make the effective user ID (root) the only user ID instead of
408
	 the real user ID (_mandos) */
409
      ret = setuid(geteuid());
410
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
411
	error_plus(0, errno, "setuid");
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
412
      }
413
      
414
      setsid();
415
      ret = chdir("/");
416
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
417
	error_plus(0, errno, "chdir");
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
418
      }
419
/*       if(fork() != 0){ */
420
/* 	_exit(EXIT_SUCCESS); */
421
/*       } */
422
      ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
423
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
424
	error_plus(0, errno, "dup2");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
425
	_exit(EX_OSERR);
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
426
      }
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
427
      
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
428
      execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
429
      {
430
	int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
431
	error_plus(0, errno, "execl");
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
432
	switch(e){
433
	case EACCES:
434
	case ENOENT:
435
	case ENOEXEC:
436
	default:
437
	  _exit(EX_UNAVAILABLE);
438
	case ENAMETOOLONG:
439
	case E2BIG:
440
	case ENOMEM:
441
	  _exit(EX_OSERR);
442
	case ENOTDIR:
443
	case ELOOP:
444
	  _exit(EX_OSFILE);
445
	}
446
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
447
    }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
448
  }
449
  
450
  if(interrupted_by_signal){
451
    struct sigaction signal_action;
452
    sigemptyset(&signal_action.sa_mask);
453
    signal_action.sa_handler = SIG_DFL;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
454
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
455
					    &signal_action, NULL));
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
456
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
457
      error_plus(0, errno, "sigaction");
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
458
    }
459
    do {
460
      ret = raise(signal_received);
461
    } while(ret != 0 and errno == EINTR);
462
    if(ret != 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
463
      error_plus(0, errno, "raise");
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
464
      abort();
465
    }
466
    TEMP_FAILURE_RETRY(pause());
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
467
  }
468
  
389 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
469
  return exitstatus;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
470
}