/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
/*
3
 * Passprompt - Read a password from usplash and output it
4
 * 
237.2.9 by Teddy Hogeborn
* README: Update copyright year; add "2009".
5
 * Copyright © 2008,2009 Teddy Hogeborn
6
 * Copyright © 2008,2009 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
 * 
22
 * Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
23
 * <https://www.fukt.bsnet.se/~teddy/>.
24
 */
25
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
26
#define _GNU_SOURCE		/* asprintf() */
27
#include <signal.h>		/* sig_atomic_t, struct sigaction,
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
28
				   sigemptyset(), sigaddset(), SIGINT,
29
				   SIGHUP, SIGTERM, sigaction(),
30
				   SIG_IGN, kill(), SIGKILL */
31
#include <stdbool.h>		/* bool, false, true */
32
#include <fcntl.h>		/* open(), O_WRONLY, O_RDONLY */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
33
#include <iso646.h>		/* and, or, not*/
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
34
#include <errno.h>		/* errno, EINTR */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
35
#include <sys/types.h>		/* size_t, ssize_t, pid_t, DIR, struct
36
				   dirent */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
37
#include <stddef.h>		/* NULL */
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
38
#include <string.h>		/* strlen(), memcmp() */
39
#include <stdio.h>		/* asprintf(), perror() */
40
#include <unistd.h>		/* close(), write(), readlink(),
41
				   read(), STDOUT_FILENO, sleep(),
42
				   fork(), setuid(), geteuid(),
43
				   setsid(), chdir(), dup2(),
44
				   STDERR_FILENO, execv() */
45
#include <stdlib.h>		/* free(), EXIT_FAILURE, strtoul(),
46
				   realloc(), EXIT_SUCCESS, malloc(),
47
				   _exit() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
48
#include <stdlib.h>		/* getenv() */
49
#include <dirent.h>		/* opendir(), readdir(), closedir() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
50
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
51
52
sig_atomic_t interrupted_by_signal = 0;
53
54
static void termination_handler(__attribute__((unused))int signum){
55
  interrupted_by_signal = 1;
56
}
57
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
58
static bool usplash_write(const char *cmd, const char *arg){
59
  /* 
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
60
   * usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
61
   * usplash_write("PULSATE", NULL) will write "PULSATE\0"
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
62
   * SEE ALSO
63
   *         usplash_write(8)
64
   */
65
  int ret;
66
  int fifo_fd;
67
  do{
68
    fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
69
    if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
70
      return false;
71
    }
72
  }while(fifo_fd == -1);
73
  
74
  const char *cmd_line;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
75
  size_t cmd_line_len;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
76
  char *cmd_line_alloc = NULL;
77
  if(arg == NULL){
78
    cmd_line = cmd;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
79
    cmd_line_len = strlen(cmd);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
80
  }else{
81
    do{
82
      ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
83
      if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
84
	int e = errno;
85
	close(fifo_fd);
86
	errno = e;
87
	return false;
88
      }
89
    }while(ret == -1);
90
    cmd_line = cmd_line_alloc;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
91
    cmd_line_len = (size_t)ret + 1;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
92
  }
93
  
94
  size_t written = 0;
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
95
  ssize_t sret = 0;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
96
  while(not interrupted_by_signal and written < cmd_line_len){
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
97
    sret = write(fifo_fd, cmd_line + written,
98
		 cmd_line_len - written);
99
    if(sret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
100
      if(errno != EINTR or interrupted_by_signal){
101
	int e = errno;
102
	close(fifo_fd);
103
	free(cmd_line_alloc);
104
	errno = e;
105
	return false;
106
      } else {
107
	continue;
108
      }
109
    }
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
110
    written += (size_t)sret;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
111
  }
112
  free(cmd_line_alloc);
113
  do{
114
    ret = close(fifo_fd);
115
    if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
116
      return false;
117
    }
118
  }while(ret == -1);
119
  if(interrupted_by_signal){
120
    return false;
121
  }
122
  return true;
123
}
124
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
125
int main(__attribute__((unused))int argc,
126
	 __attribute__((unused))char **argv){
127
  int ret = 0;
128
  ssize_t sret;
129
  bool an_error_occured = false;
130
  
131
  /* Create prompt string */
132
  char *prompt = NULL;
133
  {
134
    const char *const cryptsource = getenv("cryptsource");
135
    const char *const crypttarget = getenv("crypttarget");
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
136
    const char prompt_start[] = "Enter passphrase to unlock the disk";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
137
    
138
    if(cryptsource == NULL){
139
      if(crypttarget == NULL){
140
	ret = asprintf(&prompt, "%s: ", prompt_start);
141
      } else {
142
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
143
		       crypttarget);
144
      }
145
    } else {
146
      if(crypttarget == NULL){
147
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
148
      } else {
149
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
150
		       cryptsource, crypttarget);
151
      }
152
    }
153
    if(ret == -1){
154
      return EXIT_FAILURE;
155
    }
156
  }
157
  
158
  /* Find usplash process */
159
  pid_t usplash_pid = 0;
160
  char *cmdline = NULL;
161
  size_t cmdline_len = 0;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
162
  const char usplash_name[] = "/sbin/usplash";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
163
  {
164
    DIR *proc_dir = opendir("/proc");
165
    if(proc_dir == NULL){
166
      free(prompt);
167
      perror("opendir");
168
      return EXIT_FAILURE;
169
    }
170
    for(struct dirent *proc_ent = readdir(proc_dir);
171
	proc_ent != NULL;
172
	proc_ent = readdir(proc_dir)){
173
      pid_t pid = (pid_t) strtoul(proc_ent->d_name, NULL, 10);
174
      if(pid == 0){
175
	/* Not a process */
176
	continue;
177
      }
178
      /* Find the executable name by doing readlink() on the
179
	 /proc/<pid>/exe link */
180
      char exe_target[sizeof(usplash_name)];
181
      {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
182
	/* create file name string */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
183
	char *exe_link;
184
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
185
	if(ret == -1){
186
	  perror("asprintf");
187
	  free(prompt);
188
	  closedir(proc_dir);
189
	  return EXIT_FAILURE;
190
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
191
	
192
	/* Check that it refers to a symlink owned by root:root */
193
	struct stat exe_stat;
194
	ret = lstat(exe_link, &exe_stat);
195
	if(ret == -1){
196
	  perror("lstat");
197
	  free(exe_link);
198
	  free(prompt);
199
	  closedir(proc_dir);
200
	  return EXIT_FAILURE;
201
	}
202
	if(not S_ISLNK(exe_stat.st_mode)
203
	   or exe_stat.st_uid != 0
204
	   or exe_stat.st_gid != 0){
205
	  free(exe_link);
206
	  continue;
207
	}
208
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
209
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
210
	free(exe_link);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
211
	if(sret == -1){
212
	  continue;
213
	}
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
214
      }
215
      if((sret == ((ssize_t)sizeof(exe_target)-1))
216
	 and (memcmp(usplash_name, exe_target,
217
		     sizeof(exe_target)-1) == 0)){
218
	usplash_pid = pid;
219
	/* Read and save the command line of usplash in "cmdline" */
220
	{
221
	  /* Open /proc/<pid>/cmdline  */
222
	  int cl_fd;
223
	  {
224
	    char *cmdline_filename;
225
	    ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
226
			   proc_ent->d_name);
227
	    if(ret == -1){
228
	      perror("asprintf");
229
	      free(prompt);
230
	      closedir(proc_dir);
231
	      return EXIT_FAILURE;
232
	    }
233
	    cl_fd = open(cmdline_filename, O_RDONLY);
234
	    if(cl_fd == -1){
235
	      perror("open");
236
	      free(cmdline_filename);
237
	      free(prompt);
238
	      closedir(proc_dir);
239
	      return EXIT_FAILURE;
240
	    }
241
	    free(cmdline_filename);
242
	  }
243
	  size_t cmdline_allocated = 0;
244
	  char *tmp;
245
	  const size_t blocksize = 1024;
246
	  do{
247
	    if(cmdline_len + blocksize > cmdline_allocated){
248
	      tmp = realloc(cmdline, cmdline_allocated + blocksize);
249
	      if(tmp == NULL){
250
		perror("realloc");
251
		free(cmdline);
252
		free(prompt);
253
		closedir(proc_dir);
254
		return EXIT_FAILURE;
255
	      }
256
	      cmdline = tmp;
257
	      cmdline_allocated += blocksize;
258
	    }
259
	    sret = read(cl_fd, cmdline + cmdline_len,
260
			cmdline_allocated - cmdline_len);
261
	    if(sret == -1){
262
	      perror("read");
263
	      free(cmdline);
264
	      free(prompt);
265
	      closedir(proc_dir);
266
	      return EXIT_FAILURE;
267
	    }
268
	    cmdline_len += (size_t)sret;
269
	  } while(sret != 0);
270
	  close(cl_fd);
271
	}
272
	break;
273
      }
274
    }
275
    closedir(proc_dir);
276
  }
277
  if(usplash_pid == 0){
278
    free(prompt);
279
    return EXIT_FAILURE;
280
  }
281
  
282
  /* Set up the signal handler */
283
  {
284
    struct sigaction old_action,
285
      new_action = { .sa_handler = termination_handler,
286
		     .sa_flags = 0 };
287
    sigemptyset(&new_action.sa_mask);
288
    sigaddset(&new_action.sa_mask, SIGINT);
289
    sigaddset(&new_action.sa_mask, SIGHUP);
290
    sigaddset(&new_action.sa_mask, SIGTERM);
291
    ret = sigaction(SIGINT, NULL, &old_action);
292
    if(ret == -1){
293
      perror("sigaction");
294
      free(prompt);
295
      return EXIT_FAILURE;
296
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
297
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
298
      ret = sigaction(SIGINT, &new_action, NULL);
299
      if(ret == -1){
300
	perror("sigaction");
301
	free(prompt);
302
	return EXIT_FAILURE;
303
      }
304
    }
305
    ret = sigaction(SIGHUP, NULL, &old_action);
306
    if(ret == -1){
307
      perror("sigaction");
308
      free(prompt);
309
      return EXIT_FAILURE;
310
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
311
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
312
      ret = sigaction(SIGHUP, &new_action, NULL);
313
      if(ret == -1){
314
	perror("sigaction");
315
	free(prompt);
316
	return EXIT_FAILURE;
317
      }
318
    }
319
    ret = sigaction(SIGTERM, NULL, &old_action);
320
    if(ret == -1){
321
      perror("sigaction");
322
      free(prompt);
323
      return EXIT_FAILURE;
324
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
325
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
326
      ret = sigaction(SIGTERM, &new_action, NULL);
327
      if(ret == -1){
328
	perror("sigaction");
329
	free(prompt);
330
	return EXIT_FAILURE;
331
      }
332
    }
333
  }
334
  
335
  /* Write command to FIFO */
336
  if(not interrupted_by_signal){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
337
    if(not usplash_write("TIMEOUT", "0")
338
       and (errno != EINTR)){
339
      perror("usplash_write");
340
      an_error_occured = true;
341
    }
342
  }
343
  if(not interrupted_by_signal and not an_error_occured){
344
    if(not usplash_write("INPUTQUIET", prompt)
345
       and (errno != EINTR)){
346
      perror("usplash_write");
347
      an_error_occured = true;
348
    }
349
  }
350
  free(prompt);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
351
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
352
  /* This is not really a loop; while() is used to be able to "break"
353
     out of it; those breaks are marked "Big" */
354
  while(not interrupted_by_signal and not an_error_occured){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
355
    char *buf = NULL;
356
    size_t buf_len = 0;
357
    
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
358
    /* Open FIFO */
359
    int fifo_fd;
360
    do{
361
      fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
362
      if(fifo_fd == -1){
363
	if(errno != EINTR){
364
	  perror("open");
365
	  an_error_occured = true;
366
	  break;
367
	}
368
	if(interrupted_by_signal){
369
	  break;
370
	}
371
      }
372
    }while(fifo_fd == -1);
373
    if(interrupted_by_signal or an_error_occured){
374
      break;			/* Big */
375
    }
376
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
377
    /* Read from FIFO */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
378
    size_t buf_allocated = 0;
379
    const size_t blocksize = 1024;
380
    do{
381
      if(buf_len + blocksize > buf_allocated){
382
	char *tmp = realloc(buf, buf_allocated + blocksize);
383
	if(tmp == NULL){
384
	  perror("realloc");
385
	  an_error_occured = true;
386
	  break;
387
	}
388
	buf = tmp;
389
	buf_allocated += blocksize;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
390
      }
391
      do{
392
	sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
393
	if(sret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
394
	  if(errno != EINTR){
395
	    perror("read");
396
	    an_error_occured = true;
397
	    break;
398
	  }
399
	  if(interrupted_by_signal){
400
	    break;
401
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
402
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
403
      }while(sret == -1);
404
      if(interrupted_by_signal or an_error_occured){
405
	break;
406
      }
407
      
408
      buf_len += (size_t)sret;
409
    }while(sret != 0);
410
    close(fifo_fd);
411
    if(interrupted_by_signal or an_error_occured){
412
      break;			/* Big */
413
    }
414
    
415
    if(not usplash_write("TIMEOUT", "15")
416
       and (errno != EINTR)){
417
	perror("usplash_write");
418
	an_error_occured = true;
419
    }
420
    if(interrupted_by_signal or an_error_occured){
421
      break;			/* Big */
422
    }
423
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
424
    /* Print password to stdout */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
425
    size_t written = 0;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
426
    while(written < buf_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
427
      do{
428
	sret = write(STDOUT_FILENO, buf + written, buf_len - written);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
429
	if(sret == -1){
430
	  if(errno != EINTR){
431
	    perror("write");
432
	    an_error_occured = true;
433
	    break;
434
	  }
435
	  if(interrupted_by_signal){
436
	    break;
437
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
438
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
439
      }while(sret == -1);
440
      if(interrupted_by_signal or an_error_occured){
441
	break;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
442
      }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
443
      written += (size_t)sret;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
444
    }
445
    free(buf);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
446
    if(not interrupted_by_signal and not an_error_occured){
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
447
      free(cmdline);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
448
      return EXIT_SUCCESS;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
449
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
450
    break;			/* Big */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
451
  }				/* end of non-loop while() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
452
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
453
  /* If we got here, an error or interrupt must have happened */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
454
  
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
455
  /* Create argc and argv for new usplash*/
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
456
  int cmdline_argc = 0;
457
  char **cmdline_argv = malloc(sizeof(char *));
458
  {
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
459
    size_t position = 0;
460
    while(position < cmdline_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
461
      char **tmp = realloc(cmdline_argv,
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
462
			   (sizeof(char *)
463
			    * (size_t)(cmdline_argc + 2)));
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
464
      if(tmp == NULL){
465
	perror("realloc");
466
	free(cmdline_argv);
467
	return EXIT_FAILURE;
468
      }
469
      cmdline_argv = tmp;
470
      cmdline_argv[cmdline_argc] = cmdline + position;
471
      cmdline_argc++;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
472
      position += strlen(cmdline + position) + 1;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
473
    }
474
    cmdline_argv[cmdline_argc] = NULL;
475
  }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
476
  /* Kill old usplash */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
477
  kill(usplash_pid, SIGTERM);
478
  sleep(2);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
479
  while(kill(usplash_pid, 0) == 0){
480
    kill(usplash_pid, SIGKILL);
481
    sleep(1);
482
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
483
  pid_t new_usplash_pid = fork();
484
  if(new_usplash_pid == 0){
485
    /* Child; will become new usplash process */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
486
    
487
    /* Make the effective user ID (root) the only user ID instead of
488
       the real user ID (mandos) */
489
    ret = setuid(geteuid());
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
490
    if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
491
      perror("setuid");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
492
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
493
    
494
    setsid();
495
    ret = chdir("/");
496
/*     if(fork() != 0){ */
497
/*       _exit(EXIT_SUCCESS); */
498
/*     } */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
499
    ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
500
    if(ret == -1){
501
      perror("dup2");
502
      _exit(EXIT_FAILURE);
503
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
504
    
505
    execv(usplash_name, cmdline_argv);
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
506
    if(not interrupted_by_signal){
507
      perror("execv");
508
    }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
509
    free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
510
    free(cmdline_argv);
511
    _exit(EXIT_FAILURE);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
512
  }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
513
  free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
514
  free(cmdline_argv);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
515
  sleep(2);
516
  if(not usplash_write("PULSATE", NULL)
517
     and (errno != EINTR)){
518
    perror("usplash_write");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
519
  }
520
  
521
  return EXIT_FAILURE;
522
}