/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
 * 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
 * 
246 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() */
311 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
39
#include <stdio.h>		/* asprintf(), perror() */
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() */
264 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() */
311 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
49
#include <inttypes.h>		/* intmax_t, strtoimax() */
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);
24.1.139 by Björn Påhlsson
merge
69
    if((fifo_fd == -1) and (errno != EINTR or interrupted_by_signal)){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
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;
257.1.2 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){
257.1.2 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
    }
257.1.2 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)){
264 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
173
      pid_t pid;
268 by Teddy Hogeborn
Fixes for sscanf usage:
174
      {
175
	intmax_t tmpmax;
311 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
176
	char *tmp;
177
	errno = 0;
178
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
179
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
180
	   or tmpmax != (pid_t)tmpmax){
268 by Teddy Hogeborn
Fixes for sscanf usage:
181
	  /* Not a process */
182
	  continue;
183
	}
184
	pid = (pid_t)tmpmax;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
185
      }
186
      /* Find the executable name by doing readlink() on the
187
	 /proc/<pid>/exe link */
188
      char exe_target[sizeof(usplash_name)];
189
      {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
190
	/* create file name string */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
191
	char *exe_link;
192
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
193
	if(ret == -1){
194
	  perror("asprintf");
195
	  free(prompt);
196
	  closedir(proc_dir);
197
	  return EXIT_FAILURE;
198
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
199
	
200
	/* Check that it refers to a symlink owned by root:root */
201
	struct stat exe_stat;
202
	ret = lstat(exe_link, &exe_stat);
203
	if(ret == -1){
262 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
204
	  if(errno == ENOENT){
205
	    free(exe_link);
206
	    continue;
207
	  }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
208
	  perror("lstat");
209
	  free(exe_link);
210
	  free(prompt);
211
	  closedir(proc_dir);
212
	  return EXIT_FAILURE;
213
	}
214
	if(not S_ISLNK(exe_stat.st_mode)
215
	   or exe_stat.st_uid != 0
216
	   or exe_stat.st_gid != 0){
217
	  free(exe_link);
218
	  continue;
219
	}
220
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
221
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
222
	free(exe_link);
223
      }
224
      if((sret == ((ssize_t)sizeof(exe_target)-1))
225
	 and (memcmp(usplash_name, exe_target,
226
		     sizeof(exe_target)-1) == 0)){
227
	usplash_pid = pid;
228
	/* Read and save the command line of usplash in "cmdline" */
229
	{
230
	  /* Open /proc/<pid>/cmdline  */
231
	  int cl_fd;
232
	  {
233
	    char *cmdline_filename;
234
	    ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
235
			   proc_ent->d_name);
236
	    if(ret == -1){
237
	      perror("asprintf");
238
	      free(prompt);
239
	      closedir(proc_dir);
240
	      return EXIT_FAILURE;
241
	    }
242
	    cl_fd = open(cmdline_filename, O_RDONLY);
243
	    if(cl_fd == -1){
244
	      perror("open");
245
	      free(cmdline_filename);
246
	      free(prompt);
247
	      closedir(proc_dir);
248
	      return EXIT_FAILURE;
249
	    }
250
	    free(cmdline_filename);
251
	  }
252
	  size_t cmdline_allocated = 0;
253
	  char *tmp;
254
	  const size_t blocksize = 1024;
255
	  do{
256
	    if(cmdline_len + blocksize > cmdline_allocated){
257
	      tmp = realloc(cmdline, cmdline_allocated + blocksize);
258
	      if(tmp == NULL){
259
		perror("realloc");
260
		free(cmdline);
261
		free(prompt);
262
		closedir(proc_dir);
263
		return EXIT_FAILURE;
264
	      }
265
	      cmdline = tmp;
266
	      cmdline_allocated += blocksize;
267
	    }
268
	    sret = read(cl_fd, cmdline + cmdline_len,
269
			cmdline_allocated - cmdline_len);
270
	    if(sret == -1){
271
	      perror("read");
272
	      free(cmdline);
273
	      free(prompt);
274
	      closedir(proc_dir);
275
	      return EXIT_FAILURE;
276
	    }
277
	    cmdline_len += (size_t)sret;
278
	  } while(sret != 0);
279
	  close(cl_fd);
280
	}
281
	break;
282
      }
283
    }
284
    closedir(proc_dir);
285
  }
286
  if(usplash_pid == 0){
287
    free(prompt);
288
    return EXIT_FAILURE;
289
  }
290
  
291
  /* Set up the signal handler */
292
  {
293
    struct sigaction old_action,
294
      new_action = { .sa_handler = termination_handler,
295
		     .sa_flags = 0 };
296
    sigemptyset(&new_action.sa_mask);
297
    sigaddset(&new_action.sa_mask, SIGINT);
298
    sigaddset(&new_action.sa_mask, SIGHUP);
299
    sigaddset(&new_action.sa_mask, SIGTERM);
300
    ret = sigaction(SIGINT, NULL, &old_action);
301
    if(ret == -1){
302
      perror("sigaction");
303
      free(prompt);
304
      return EXIT_FAILURE;
305
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
306
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
307
      ret = sigaction(SIGINT, &new_action, NULL);
308
      if(ret == -1){
309
	perror("sigaction");
310
	free(prompt);
311
	return EXIT_FAILURE;
312
      }
313
    }
314
    ret = sigaction(SIGHUP, NULL, &old_action);
315
    if(ret == -1){
316
      perror("sigaction");
317
      free(prompt);
318
      return EXIT_FAILURE;
319
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
320
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
321
      ret = sigaction(SIGHUP, &new_action, NULL);
322
      if(ret == -1){
323
	perror("sigaction");
324
	free(prompt);
325
	return EXIT_FAILURE;
326
      }
327
    }
328
    ret = sigaction(SIGTERM, NULL, &old_action);
329
    if(ret == -1){
330
      perror("sigaction");
331
      free(prompt);
332
      return EXIT_FAILURE;
333
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
334
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
335
      ret = sigaction(SIGTERM, &new_action, NULL);
336
      if(ret == -1){
337
	perror("sigaction");
338
	free(prompt);
339
	return EXIT_FAILURE;
340
      }
341
    }
342
  }
343
  
344
  /* Write command to FIFO */
345
  if(not interrupted_by_signal){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
346
    if(not usplash_write("TIMEOUT", "0")
347
       and (errno != EINTR)){
348
      perror("usplash_write");
349
      an_error_occured = true;
350
    }
351
  }
352
  if(not interrupted_by_signal and not an_error_occured){
353
    if(not usplash_write("INPUTQUIET", prompt)
354
       and (errno != EINTR)){
355
      perror("usplash_write");
356
      an_error_occured = true;
357
    }
358
  }
359
  free(prompt);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
360
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
361
  /* This is not really a loop; while() is used to be able to "break"
362
     out of it; those breaks are marked "Big" */
363
  while(not interrupted_by_signal and not an_error_occured){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
364
    char *buf = NULL;
365
    size_t buf_len = 0;
366
    
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
367
    /* Open FIFO */
368
    int fifo_fd;
369
    do{
370
      fifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
371
      if(fifo_fd == -1){
372
	if(errno != EINTR){
373
	  perror("open");
374
	  an_error_occured = true;
375
	  break;
376
	}
377
	if(interrupted_by_signal){
378
	  break;
379
	}
380
      }
381
    }while(fifo_fd == -1);
382
    if(interrupted_by_signal or an_error_occured){
383
      break;			/* Big */
384
    }
385
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
386
    /* Read from FIFO */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
387
    size_t buf_allocated = 0;
388
    const size_t blocksize = 1024;
389
    do{
390
      if(buf_len + blocksize > buf_allocated){
391
	char *tmp = realloc(buf, buf_allocated + blocksize);
392
	if(tmp == NULL){
393
	  perror("realloc");
394
	  an_error_occured = true;
395
	  break;
396
	}
397
	buf = tmp;
398
	buf_allocated += blocksize;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
399
      }
400
      do{
401
	sret = read(fifo_fd, buf + buf_len, buf_allocated - buf_len);
402
	if(sret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
403
	  if(errno != EINTR){
404
	    perror("read");
405
	    an_error_occured = true;
406
	    break;
407
	  }
408
	  if(interrupted_by_signal){
409
	    break;
410
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
411
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
412
      }while(sret == -1);
413
      if(interrupted_by_signal or an_error_occured){
414
	break;
415
      }
416
      
417
      buf_len += (size_t)sret;
418
    }while(sret != 0);
419
    close(fifo_fd);
420
    if(interrupted_by_signal or an_error_occured){
421
      break;			/* Big */
422
    }
423
    
424
    if(not usplash_write("TIMEOUT", "15")
425
       and (errno != EINTR)){
426
	perror("usplash_write");
427
	an_error_occured = true;
428
    }
429
    if(interrupted_by_signal or an_error_occured){
430
      break;			/* Big */
431
    }
432
    
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
433
    /* Print password to stdout */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
434
    size_t written = 0;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
435
    while(written < buf_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
436
      do{
437
	sret = write(STDOUT_FILENO, buf + written, buf_len - written);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
438
	if(sret == -1){
439
	  if(errno != EINTR){
440
	    perror("write");
441
	    an_error_occured = true;
442
	    break;
443
	  }
444
	  if(interrupted_by_signal){
445
	    break;
446
	  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
447
	}
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
448
      }while(sret == -1);
449
      if(interrupted_by_signal or an_error_occured){
450
	break;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
451
      }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
452
      written += (size_t)sret;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
453
    }
454
    free(buf);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
455
    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.
456
      free(cmdline);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
457
      return EXIT_SUCCESS;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
458
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
459
    break;			/* Big */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
460
  }				/* end of non-loop while() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
461
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
462
  /* If we got here, an error or interrupt must have happened */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
463
  
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
464
  /* Create argc and argv for new usplash*/
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
465
  int cmdline_argc = 0;
466
  char **cmdline_argv = malloc(sizeof(char *));
467
  {
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
468
    size_t position = 0;
469
    while(position < cmdline_len){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
470
      char **tmp = realloc(cmdline_argv,
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
471
			   (sizeof(char *)
472
			    * (size_t)(cmdline_argc + 2)));
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
473
      if(tmp == NULL){
474
	perror("realloc");
475
	free(cmdline_argv);
476
	return EXIT_FAILURE;
477
      }
478
      cmdline_argv = tmp;
479
      cmdline_argv[cmdline_argc] = cmdline + position;
480
      cmdline_argc++;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
481
      position += strlen(cmdline + position) + 1;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
482
    }
483
    cmdline_argv[cmdline_argc] = NULL;
484
  }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
485
  /* Kill old usplash */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
486
  kill(usplash_pid, SIGTERM);
487
  sleep(2);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
488
  while(kill(usplash_pid, 0) == 0){
489
    kill(usplash_pid, SIGKILL);
490
    sleep(1);
491
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
492
  pid_t new_usplash_pid = fork();
493
  if(new_usplash_pid == 0){
494
    /* Child; will become new usplash process */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
495
    
496
    /* Make the effective user ID (root) the only user ID instead of
265 by Teddy Hogeborn
* plugin-runner.c (main): Bug fix; do not accept a "d" character after
497
       the real user ID (_mandos) */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
498
    ret = setuid(geteuid());
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
499
    if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
500
      perror("setuid");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
501
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
502
    
503
    setsid();
504
    ret = chdir("/");
505
/*     if(fork() != 0){ */
506
/*       _exit(EXIT_SUCCESS); */
507
/*     } */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
508
    ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
509
    if(ret == -1){
510
      perror("dup2");
511
      _exit(EXIT_FAILURE);
512
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
513
    
514
    execv(usplash_name, cmdline_argv);
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
515
    if(not interrupted_by_signal){
516
      perror("execv");
517
    }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
518
    free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
519
    free(cmdline_argv);
520
    _exit(EXIT_FAILURE);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
521
  }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
522
  free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
523
  free(cmdline_argv);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
524
  sleep(2);
525
  if(not usplash_write("PULSATE", NULL)
526
     and (errno != EINTR)){
527
    perror("usplash_write");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
528
  }
529
  
530
  return EXIT_FAILURE;
531
}