/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
 * Usplash - Read a password from usplash and output it
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
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() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
39
#include <stdio.h>		/* asprintf(), perror(), sscanf() */
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
40
#include <unistd.h>		/* close(), write(), readlink(),
41
				   read(), STDOUT_FILENO, sleep(),
42
				   fork(), setuid(), geteuid(),
43
				   setsid(), chdir(), dup2(),
44
				   STDERR_FILENO, execv() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
45
#include <stdlib.h>		/* free(), EXIT_FAILURE, realloc(),
46
				   EXIT_SUCCESS, malloc(), _exit() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
47
#include <stdlib.h>		/* getenv() */
48
#include <dirent.h>		/* opendir(), readdir(), closedir() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
49
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
50
51
sig_atomic_t interrupted_by_signal = 0;
52
53
static void termination_handler(__attribute__((unused))int signum){
54
  interrupted_by_signal = 1;
55
}
56
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
57
static bool usplash_write(const char *cmd, const char *arg){
58
  /* 
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
59
   * usplash_write("TIMEOUT", "15") will write "TIMEOUT 15\0"
60
   * usplash_write("PULSATE", NULL) will write "PULSATE\0"
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
61
   * SEE ALSO
62
   *         usplash_write(8)
63
   */
64
  int ret;
65
  int fifo_fd;
66
  do{
67
    fifo_fd = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
68
    if(fifo_fd == -1 and (errno != EINTR or interrupted_by_signal)){
69
      return false;
70
    }
71
  }while(fifo_fd == -1);
72
  
73
  const char *cmd_line;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
74
  size_t cmd_line_len;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
75
  char *cmd_line_alloc = NULL;
76
  if(arg == NULL){
77
    cmd_line = cmd;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
78
    cmd_line_len = strlen(cmd);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
79
  }else{
80
    do{
81
      ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
82
      if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
83
	int e = errno;
84
	close(fifo_fd);
85
	errno = e;
86
	return false;
87
      }
88
    }while(ret == -1);
89
    cmd_line = cmd_line_alloc;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
90
    cmd_line_len = (size_t)ret + 1;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
91
  }
92
  
93
  size_t written = 0;
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
94
  ssize_t sret = 0;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
95
  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
96
    sret = write(fifo_fd, cmd_line + written,
97
		 cmd_line_len - written);
98
    if(sret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
99
      if(errno != EINTR or interrupted_by_signal){
100
	int e = errno;
101
	close(fifo_fd);
102
	free(cmd_line_alloc);
103
	errno = e;
104
	return false;
105
      } else {
106
	continue;
107
      }
108
    }
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
109
    written += (size_t)sret;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
110
  }
111
  free(cmd_line_alloc);
112
  do{
113
    ret = close(fifo_fd);
114
    if(ret == -1 and (errno != EINTR or interrupted_by_signal)){
115
      return false;
116
    }
117
  }while(ret == -1);
118
  if(interrupted_by_signal){
119
    return false;
120
  }
121
  return true;
122
}
123
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
124
int main(__attribute__((unused))int argc,
125
	 __attribute__((unused))char **argv){
126
  int ret = 0;
127
  ssize_t sret;
128
  bool an_error_occured = false;
129
  
130
  /* Create prompt string */
131
  char *prompt = NULL;
132
  {
133
    const char *const cryptsource = getenv("cryptsource");
134
    const char *const crypttarget = getenv("crypttarget");
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
135
    const char prompt_start[] = "Enter passphrase to unlock the disk";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
136
    
137
    if(cryptsource == NULL){
138
      if(crypttarget == NULL){
139
	ret = asprintf(&prompt, "%s: ", prompt_start);
140
      } else {
141
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
142
		       crypttarget);
143
      }
144
    } else {
145
      if(crypttarget == NULL){
146
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
147
      } else {
148
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
149
		       cryptsource, crypttarget);
150
      }
151
    }
152
    if(ret == -1){
153
      return EXIT_FAILURE;
154
    }
155
  }
156
  
157
  /* Find usplash process */
158
  pid_t usplash_pid = 0;
159
  char *cmdline = NULL;
160
  size_t cmdline_len = 0;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
161
  const char usplash_name[] = "/sbin/usplash";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
162
  {
163
    DIR *proc_dir = opendir("/proc");
164
    if(proc_dir == NULL){
165
      free(prompt);
166
      perror("opendir");
167
      return EXIT_FAILURE;
168
    }
169
    for(struct dirent *proc_ent = readdir(proc_dir);
170
	proc_ent != NULL;
171
	proc_ent = readdir(proc_dir)){
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
172
      pid_t pid;
173
      /* In the GNU C library, pid_t is always int */
174
      ret = sscanf(proc_ent->d_name, "%d", &pid);
175
      if(ret != 1){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
176
	/* Not a process */
177
	continue;
178
      }
179
      /* Find the executable name by doing readlink() on the
180
	 /proc/<pid>/exe link */
181
      char exe_target[sizeof(usplash_name)];
182
      {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
183
	/* create file name string */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
184
	char *exe_link;
185
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
186
	if(ret == -1){
187
	  perror("asprintf");
188
	  free(prompt);
189
	  closedir(proc_dir);
190
	  return EXIT_FAILURE;
191
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
192
	
193
	/* Check that it refers to a symlink owned by root:root */
194
	struct stat exe_stat;
195
	ret = lstat(exe_link, &exe_stat);
196
	if(ret == -1){
237.2.25 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
197
	  if(errno == ENOENT){
198
	    free(exe_link);
199
	    continue;
200
	  }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
201
	  perror("lstat");
202
	  free(exe_link);
203
	  free(prompt);
204
	  closedir(proc_dir);
205
	  return EXIT_FAILURE;
206
	}
207
	if(not S_ISLNK(exe_stat.st_mode)
208
	   or exe_stat.st_uid != 0
209
	   or exe_stat.st_gid != 0){
210
	  free(exe_link);
211
	  continue;
212
	}
213
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
214
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
215
	free(exe_link);
216
      }
217
      if((sret == ((ssize_t)sizeof(exe_target)-1))
218
	 and (memcmp(usplash_name, exe_target,
219
		     sizeof(exe_target)-1) == 0)){
220
	usplash_pid = pid;
221
	/* Read and save the command line of usplash in "cmdline" */
222
	{
223
	  /* Open /proc/<pid>/cmdline  */
224
	  int cl_fd;
225
	  {
226
	    char *cmdline_filename;
227
	    ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
228
			   proc_ent->d_name);
229
	    if(ret == -1){
230
	      perror("asprintf");
231
	      free(prompt);
232
	      closedir(proc_dir);
233
	      return EXIT_FAILURE;
234
	    }
235
	    cl_fd = open(cmdline_filename, O_RDONLY);
236
	    if(cl_fd == -1){
237
	      perror("open");
238
	      free(cmdline_filename);
239
	      free(prompt);
240
	      closedir(proc_dir);
241
	      return EXIT_FAILURE;
242
	    }
243
	    free(cmdline_filename);
244
	  }
245
	  size_t cmdline_allocated = 0;
246
	  char *tmp;
247
	  const size_t blocksize = 1024;
248
	  do{
249
	    if(cmdline_len + blocksize > cmdline_allocated){
250
	      tmp = realloc(cmdline, cmdline_allocated + blocksize);
251
	      if(tmp == NULL){
252
		perror("realloc");
253
		free(cmdline);
254
		free(prompt);
255
		closedir(proc_dir);
256
		return EXIT_FAILURE;
257
	      }
258
	      cmdline = tmp;
259
	      cmdline_allocated += blocksize;
260
	    }
261
	    sret = read(cl_fd, cmdline + cmdline_len,
262
			cmdline_allocated - cmdline_len);
263
	    if(sret == -1){
264
	      perror("read");
265
	      free(cmdline);
266
	      free(prompt);
267
	      closedir(proc_dir);
268
	      return EXIT_FAILURE;
269
	    }
270
	    cmdline_len += (size_t)sret;
271
	  } while(sret != 0);
272
	  close(cl_fd);
273
	}
274
	break;
275
      }
276
    }
277
    closedir(proc_dir);
278
  }
279
  if(usplash_pid == 0){
280
    free(prompt);
281
    return EXIT_FAILURE;
282
  }
283
  
284
  /* Set up the signal handler */
285
  {
286
    struct sigaction old_action,
287
      new_action = { .sa_handler = termination_handler,
288
		     .sa_flags = 0 };
289
    sigemptyset(&new_action.sa_mask);
290
    sigaddset(&new_action.sa_mask, SIGINT);
291
    sigaddset(&new_action.sa_mask, SIGHUP);
292
    sigaddset(&new_action.sa_mask, SIGTERM);
293
    ret = sigaction(SIGINT, NULL, &old_action);
294
    if(ret == -1){
295
      perror("sigaction");
296
      free(prompt);
297
      return EXIT_FAILURE;
298
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
299
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
300
      ret = sigaction(SIGINT, &new_action, NULL);
301
      if(ret == -1){
302
	perror("sigaction");
303
	free(prompt);
304
	return EXIT_FAILURE;
305
      }
306
    }
307
    ret = sigaction(SIGHUP, NULL, &old_action);
308
    if(ret == -1){
309
      perror("sigaction");
310
      free(prompt);
311
      return EXIT_FAILURE;
312
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
313
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
314
      ret = sigaction(SIGHUP, &new_action, NULL);
315
      if(ret == -1){
316
	perror("sigaction");
317
	free(prompt);
318
	return EXIT_FAILURE;
319
      }
320
    }
321
    ret = sigaction(SIGTERM, NULL, &old_action);
322
    if(ret == -1){
323
      perror("sigaction");
324
      free(prompt);
325
      return EXIT_FAILURE;
326
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
327
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
328
      ret = sigaction(SIGTERM, &new_action, NULL);
329
      if(ret == -1){
330
	perror("sigaction");
331
	free(prompt);
332
	return EXIT_FAILURE;
333
      }
334
    }
335
  }
336
  
337
  /* Write command to FIFO */
338
  if(not interrupted_by_signal){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
339
    if(not usplash_write("TIMEOUT", "0")
340
       and (errno != EINTR)){
341
      perror("usplash_write");
342
      an_error_occured = true;
343
    }
344
  }
345
  if(not interrupted_by_signal and not an_error_occured){
346
    if(not usplash_write("INPUTQUIET", prompt)
347
       and (errno != EINTR)){
348
      perror("usplash_write");
349
      an_error_occured = true;
350
    }
351
  }
352
  free(prompt);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
353
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
354
  /* This is not really a loop; while() is used to be able to "break"
355
     out of it; those breaks are marked "Big" */
356
  while(not interrupted_by_signal and not an_error_occured){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
357
    char *buf = NULL;
358
    size_t buf_len = 0;
359
    
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
360
    /* Open FIFO */
361
    int fifo_fd;
362
    do{
363
      fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
364
      if(fifo_fd == -1){
365
	if(errno != EINTR){
366
	  perror("open");
367
	  an_error_occured = true;
368
	  break;
369
	}
370
	if(interrupted_by_signal){
371
	  break;
372
	}
373
      }
374
    }while(fifo_fd == -1);
375
    if(interrupted_by_signal or an_error_occured){
376
      break;			/* Big */
377
    }
378
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
379
    /* Read from FIFO */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
380
    size_t buf_allocated = 0;
381
    const size_t blocksize = 1024;
382
    do{
383
      if(buf_len + blocksize > buf_allocated){
384
	char *tmp = realloc(buf, buf_allocated + blocksize);
385
	if(tmp == NULL){
386
	  perror("realloc");
387
	  an_error_occured = true;
388
	  break;
389
	}
390
	buf = tmp;
391
	buf_allocated += blocksize;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
392
      }
393
      do{
394
	sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
395
	if(sret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
396
	  if(errno != EINTR){
397
	    perror("read");
398
	    an_error_occured = true;
399
	    break;
400
	  }
401
	  if(interrupted_by_signal){
402
	    break;
403
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
404
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
405
      }while(sret == -1);
406
      if(interrupted_by_signal or an_error_occured){
407
	break;
408
      }
409
      
410
      buf_len += (size_t)sret;
411
    }while(sret != 0);
412
    close(fifo_fd);
413
    if(interrupted_by_signal or an_error_occured){
414
      break;			/* Big */
415
    }
416
    
417
    if(not usplash_write("TIMEOUT", "15")
418
       and (errno != EINTR)){
419
	perror("usplash_write");
420
	an_error_occured = true;
421
    }
422
    if(interrupted_by_signal or an_error_occured){
423
      break;			/* Big */
424
    }
425
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
426
    /* Print password to stdout */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
427
    size_t written = 0;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
428
    while(written < buf_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
429
      do{
430
	sret = write(STDOUT_FILENO, buf + written, buf_len - written);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
431
	if(sret == -1){
432
	  if(errno != EINTR){
433
	    perror("write");
434
	    an_error_occured = true;
435
	    break;
436
	  }
437
	  if(interrupted_by_signal){
438
	    break;
439
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
440
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
441
      }while(sret == -1);
442
      if(interrupted_by_signal or an_error_occured){
443
	break;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
444
      }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
445
      written += (size_t)sret;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
446
    }
447
    free(buf);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
448
    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.
449
      free(cmdline);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
450
      return EXIT_SUCCESS;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
451
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
452
    break;			/* Big */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
453
  }				/* end of non-loop while() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
454
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
455
  /* If we got here, an error or interrupt must have happened */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
456
  
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
457
  /* Create argc and argv for new usplash*/
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
458
  int cmdline_argc = 0;
459
  char **cmdline_argv = malloc(sizeof(char *));
460
  {
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
461
    size_t position = 0;
462
    while(position < cmdline_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
463
      char **tmp = realloc(cmdline_argv,
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
464
			   (sizeof(char *)
465
			    * (size_t)(cmdline_argc + 2)));
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
466
      if(tmp == NULL){
467
	perror("realloc");
468
	free(cmdline_argv);
469
	return EXIT_FAILURE;
470
      }
471
      cmdline_argv = tmp;
472
      cmdline_argv[cmdline_argc] = cmdline + position;
473
      cmdline_argc++;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
474
      position += strlen(cmdline + position) + 1;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
475
    }
476
    cmdline_argv[cmdline_argc] = NULL;
477
  }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
478
  /* Kill old usplash */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
479
  kill(usplash_pid, SIGTERM);
480
  sleep(2);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
481
  while(kill(usplash_pid, 0) == 0){
482
    kill(usplash_pid, SIGKILL);
483
    sleep(1);
484
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
485
  pid_t new_usplash_pid = fork();
486
  if(new_usplash_pid == 0){
487
    /* Child; will become new usplash process */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
488
    
489
    /* Make the effective user ID (root) the only user ID instead of
490
       the real user ID (mandos) */
491
    ret = setuid(geteuid());
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
492
    if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
493
      perror("setuid");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
494
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
495
    
496
    setsid();
497
    ret = chdir("/");
498
/*     if(fork() != 0){ */
499
/*       _exit(EXIT_SUCCESS); */
500
/*     } */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
501
    ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
502
    if(ret == -1){
503
      perror("dup2");
504
      _exit(EXIT_FAILURE);
505
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
506
    
507
    execv(usplash_name, cmdline_argv);
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
508
    if(not interrupted_by_signal){
509
      perror("execv");
510
    }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
511
    free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
512
    free(cmdline_argv);
513
    _exit(EXIT_FAILURE);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
514
  }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
515
  free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
516
  free(cmdline_argv);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
517
  sleep(2);
518
  if(not usplash_write("PULSATE", NULL)
519
     and (errno != EINTR)){
520
    perror("usplash_write");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
521
  }
522
  
523
  return EXIT_FAILURE;
524
}