/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
 * 
444 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
5
 * Copyright © 2008-2010 Teddy Hogeborn
6
 * Copyright © 2008-2010 Björn Påhlsson
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
7
 * 
8
 * This program is free software: you can redistribute it and/or
9
 * modify it under the terms of the GNU General Public License as
10
 * published by the Free Software Foundation, either version 3 of the
11
 * License, or (at your option) any later version.
12
 * 
13
 * This program is distributed in the hope that it will be useful, but
14
 * WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * General Public License for more details.
17
 * 
18
 * You should have received a copy of the GNU General Public License
19
 * along with this program.  If not, see
20
 * <http://www.gnu.org/licenses/>.
21
 * 
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
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
25
#define _GNU_SOURCE		/* asprintf(), TEMP_FAILURE_RETRY() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
26
#include <signal.h>		/* sig_atomic_t, struct sigaction,
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
27
				   sigemptyset(), sigaddset(), SIGINT,
28
				   SIGHUP, SIGTERM, sigaction(),
29
				   SIG_IGN, kill(), SIGKILL */
30
#include <stdbool.h>		/* bool, false, true */
31
#include <fcntl.h>		/* open(), O_WRONLY, O_RDONLY */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
32
#include <iso646.h>		/* and, or, not*/
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
33
#include <errno.h>		/* errno, EINTR */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
34
#include <error.h>
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() */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
39
#include <stdio.h>		/* asprintf()*/
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(),
24.1.151 by Björn Påhlsson
New graphical boot supported: Plymouth
46
				   EXIT_SUCCESS, malloc(), _exit(),
47
				   getenv() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
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 */
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
51
#include <sysexits.h>		/* EX_OSERR, EX_UNAVAILABLE */
431 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
52
#include <argz.h>		/* argz_count(), argz_extract() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
53
54
sig_atomic_t interrupted_by_signal = 0;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
55
int signal_received;
56
const char usplash_name[] = "/sbin/usplash";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
57
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
58
static void termination_handler(int signum){
59
  if(interrupted_by_signal){
60
    return;
61
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
62
  interrupted_by_signal = 1;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
63
  signal_received = signum;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
64
}
65
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
66
static bool usplash_write(int *fifo_fd_r,
67
			  const char *cmd, const char *arg){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
68
  /* 
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
69
   * usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
70
   * usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
71
   * SEE ALSO
72
   *         usplash_write(8)
73
   */
74
  int ret;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
75
  if(*fifo_fd_r == -1){
76
    ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
77
    if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
78
      return false;
79
    }
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
80
    *fifo_fd_r = ret;
81
  }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
82
  
83
  const char *cmd_line;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
84
  size_t cmd_line_len;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
85
  char *cmd_line_alloc = NULL;
86
  if(arg == NULL){
87
    cmd_line = cmd;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
88
    cmd_line_len = strlen(cmd) + 1;
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
89
  } else {
90
    do {
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
91
      ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
92
      if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
93
	int e = errno;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
94
	TEMP_FAILURE_RETRY(close(*fifo_fd_r));
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
95
	errno = e;
96
	return false;
97
      }
363 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
98
    } while(ret == -1);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
99
    cmd_line = cmd_line_alloc;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
100
    cmd_line_len = (size_t)ret + 1;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
101
  }
102
  
103
  size_t written = 0;
257.1.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
104
  ssize_t sret = 0;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
105
  while(written < cmd_line_len){
106
    sret = write(*fifo_fd_r, cmd_line + written,
257.1.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
107
		 cmd_line_len - written);
108
    if(sret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
109
      int e = errno;
110
      TEMP_FAILURE_RETRY(close(*fifo_fd_r));
111
      free(cmd_line_alloc);
112
      errno = e;
113
      return false;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
114
    }
257.1.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
115
    written += (size_t)sret;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
116
  }
117
  free(cmd_line_alloc);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
118
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
119
  return true;
120
}
121
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
122
/* Create prompt string */
123
char *makeprompt(void){
124
  int ret = 0;
125
  char *prompt;
126
  const char *const cryptsource = getenv("cryptsource");
127
  const char *const crypttarget = getenv("crypttarget");
128
  const char prompt_start[] = "Enter passphrase to unlock the disk";
129
  
130
  if(cryptsource == NULL){
131
    if(crypttarget == NULL){
132
      ret = asprintf(&prompt, "%s: ", prompt_start);
133
    } else {
134
      ret = asprintf(&prompt, "%s (%s): ", prompt_start,
135
		     crypttarget);
136
    }
137
  } else {
138
    if(crypttarget == NULL){
139
      ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
140
    } else {
141
      ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
142
		     cryptsource, crypttarget);
143
    }
144
  }
145
  if(ret == -1){
146
    return NULL;
147
  }
148
  return prompt;
149
}
150
151
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
152
  int ret = 0;
153
  ssize_t sret = 0;
154
  char *cmdline = NULL;
155
  size_t cmdline_len = 0;
156
  DIR *proc_dir = opendir("/proc");
157
  if(proc_dir == NULL){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
158
    error(0, errno, "opendir");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
159
    return -1;
160
  }
161
  errno = 0;
162
  for(struct dirent *proc_ent = readdir(proc_dir);
163
      proc_ent != NULL;
164
      proc_ent = readdir(proc_dir)){
165
    pid_t pid;
166
    {
167
      intmax_t tmpmax;
168
      char *tmp;
169
      tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
170
      if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
171
	 or tmpmax != (pid_t)tmpmax){
172
	/* Not a process */
173
	errno = 0;
174
	continue;
175
      }
176
      pid = (pid_t)tmpmax;
177
    }
178
    /* Find the executable name by doing readlink() on the
179
       /proc/<pid>/exe link */
180
    char exe_target[sizeof(usplash_name)];
181
    {
182
      /* create file name string */
183
      char *exe_link;
184
      ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
185
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
186
	error(0, errno, "asprintf");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
187
	goto fail_find_usplash;
188
      }
189
      
190
      /* Check that it refers to a symlink owned by root:root */
191
      struct stat exe_stat;
192
      ret = lstat(exe_link, &exe_stat);
193
      if(ret == -1){
194
	if(errno == ENOENT){
195
	  free(exe_link);
196
	  continue;
197
	}
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
198
	error(0, errno, "lstat");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
199
	free(exe_link);
200
	goto fail_find_usplash;
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
	
209
      sret = readlink(exe_link, exe_target, sizeof(exe_target));
210
      free(exe_link);
211
    }
212
    /* Compare executable name */
213
    if((sret != ((ssize_t)sizeof(exe_target)-1))
214
       or (memcmp(usplash_name, exe_target,
215
		  sizeof(exe_target)-1) != 0)){
216
      /* Not it */
217
      continue;
218
    }
219
    /* Found usplash */
220
    /* Read and save the command line of usplash in "cmdline" */
221
    {
222
      /* Open /proc/<pid>/cmdline  */
223
      int cl_fd;
224
      {
225
	char *cmdline_filename;
226
	ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
227
		       proc_ent->d_name);
228
	if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
229
	  error(0, errno, "asprintf");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
230
	  goto fail_find_usplash;
231
	}
232
	cl_fd = open(cmdline_filename, O_RDONLY);
233
	free(cmdline_filename);
234
	if(cl_fd == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
235
	  error(0, errno, "open");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
236
	  goto fail_find_usplash;
237
	}
238
      }
239
      size_t cmdline_allocated = 0;
240
      char *tmp;
241
      const size_t blocksize = 1024;
242
      do {
243
	/* Allocate more space? */
244
	if(cmdline_len + blocksize > cmdline_allocated){
245
	  tmp = realloc(cmdline, cmdline_allocated + blocksize);
246
	  if(tmp == NULL){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
247
	    error(0, errno, "realloc");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
248
	    close(cl_fd);
249
	    goto fail_find_usplash;
250
	  }
251
	  cmdline = tmp;
252
	  cmdline_allocated += blocksize;
253
	}
254
	/* Read data */
255
	sret = read(cl_fd, cmdline + cmdline_len,
256
		    cmdline_allocated - cmdline_len);
257
	if(sret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
258
	  error(0, errno, "read");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
259
	  close(cl_fd);
260
	  goto fail_find_usplash;
261
	}
262
	cmdline_len += (size_t)sret;
263
      } while(sret != 0);
264
      ret = close(cl_fd);
265
      if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
266
	error(0, errno, "close");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
267
	goto fail_find_usplash;
268
      }
269
    }
270
    /* Close directory */
271
    ret = closedir(proc_dir);
272
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
273
      error(0, errno, "closedir");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
274
      goto fail_find_usplash;
275
    }
276
    /* Success */
277
    *cmdline_r = cmdline;
278
    *cmdline_len_r = cmdline_len;
279
    return pid;
280
  }
281
  
282
 fail_find_usplash:
283
  
284
  free(cmdline);
285
  if(proc_dir != NULL){
286
    int e = errno;
287
    closedir(proc_dir);
288
    errno = e;
289
  }
290
  return 0;
291
}
292
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
293
int main(__attribute__((unused))int argc,
294
	 __attribute__((unused))char **argv){
295
  int ret = 0;
296
  ssize_t sret;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
297
  int fifo_fd = -1;
298
  int outfifo_fd = -1;
299
  char *buf = NULL;
300
  size_t buf_len = 0;
301
  pid_t usplash_pid = -1;
302
  bool usplash_accessed = false;
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
303
  int status = EXIT_FAILURE;	/* Default failure exit status */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
304
  
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
305
  char *prompt = makeprompt();
306
  if(prompt == NULL){
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
307
    status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
308
    goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
309
  }
310
  
311
  /* Find usplash process */
312
  char *cmdline = NULL;
313
  size_t cmdline_len = 0;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
314
  usplash_pid = find_usplash(&cmdline, &cmdline_len);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
315
  if(usplash_pid == 0){
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
316
    status = EX_UNAVAILABLE;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
317
    goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
318
  }
319
  
320
  /* Set up the signal handler */
321
  {
322
    struct sigaction old_action,
323
      new_action = { .sa_handler = termination_handler,
324
		     .sa_flags = 0 };
325
    sigemptyset(&new_action.sa_mask);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
326
    ret = sigaddset(&new_action.sa_mask, SIGINT);
327
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
328
      error(0, errno, "sigaddset");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
329
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
330
      goto failure;
331
    }
332
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
333
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
334
      error(0, errno, "sigaddset");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
335
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
336
      goto failure;
337
    }
338
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
339
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
340
      error(0, errno, "sigaddset");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
341
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
342
      goto failure;
343
    }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
344
    ret = sigaction(SIGINT, NULL, &old_action);
345
    if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
346
      if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
347
	error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
348
	status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
349
      }
350
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
351
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
352
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
353
      ret = sigaction(SIGINT, &new_action, NULL);
354
      if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
355
	if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
356
	  error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
357
	  status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
358
	}
359
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
360
      }
361
    }
362
    ret = sigaction(SIGHUP, NULL, &old_action);
363
    if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
364
      if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
365
	error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
366
	status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
367
      }
368
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
369
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
370
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
371
      ret = sigaction(SIGHUP, &new_action, NULL);
372
      if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
373
	if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
374
	  error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
375
	  status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
376
	}
377
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
378
      }
379
    }
380
    ret = sigaction(SIGTERM, NULL, &old_action);
381
    if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
382
      if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
383
	error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
384
	status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
385
      }
386
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
387
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
388
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
389
      ret = sigaction(SIGTERM, &new_action, NULL);
390
      if(ret == -1){
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
391
	if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
392
	  error(0, errno, "sigaction");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
393
	  status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
394
	}
395
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
396
      }
397
    }
398
  }
399
  
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
400
  usplash_accessed = true;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
401
  /* Write command to FIFO */
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
402
  if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
403
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
404
      error(0, errno, "usplash_write");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
405
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
406
    }
407
    goto failure;
408
  }
409
  
410
  if(interrupted_by_signal){
411
    goto failure;
412
  }
413
  
414
  if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
415
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
416
      error(0, errno, "usplash_write");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
417
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
418
    }
419
    goto failure;
420
  }
421
  
422
  if(interrupted_by_signal){
423
    goto failure;
424
  }
425
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
426
  free(prompt);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
427
  prompt = NULL;
428
  
429
  /* Read reply from usplash */
430
  /* Open FIFO */
431
  outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
432
  if(outfifo_fd == -1){
433
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
434
      error(0, errno, "open");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
435
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
436
    }
437
    goto failure;
438
  }
439
  
440
  if(interrupted_by_signal){
441
    goto failure;
442
  }
443
  
444
  /* Read from FIFO */
445
  size_t buf_allocated = 0;
446
  const size_t blocksize = 1024;
447
  do {
448
    /* Allocate more space */
449
    if(buf_len + blocksize > buf_allocated){
450
      char *tmp = realloc(buf, buf_allocated + blocksize);
451
      if(tmp == NULL){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
452
	if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
453
	  error(0, errno, "realloc");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
454
	  status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
455
	}
456
	goto failure;
457
      }
458
      buf = tmp;
459
      buf_allocated += blocksize;
460
    }
461
    sret = read(outfifo_fd, buf + buf_len,
462
		buf_allocated - buf_len);
463
    if(sret == -1){
464
      if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
465
	error(0, errno, "read");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
466
	status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
467
      }
468
      TEMP_FAILURE_RETRY(close(outfifo_fd));
469
      goto failure;
470
    }
471
    if(interrupted_by_signal){
472
      break;
473
    }
474
    
475
    buf_len += (size_t)sret;
476
  } while(sret != 0);
477
  ret = close(outfifo_fd);
478
  if(ret == -1){
479
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
480
      error(0, errno, "close");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
481
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
482
    }
483
    goto failure;
484
  }
485
  outfifo_fd = -1;
486
  
487
  if(interrupted_by_signal){
488
    goto failure;
489
  }
490
  
491
  if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
492
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
493
      error(0, errno, "usplash_write");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
494
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
495
    }
496
    goto failure;
497
  }
498
  
499
  if(interrupted_by_signal){
500
    goto failure;
501
  }
502
  
503
  ret = close(fifo_fd);
504
  if(ret == -1){
505
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
506
      error(0, errno, "close");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
507
      status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
508
    }
509
    goto failure;
510
  }
511
  fifo_fd = -1;
512
  
513
  /* Print password to stdout */
514
  size_t written = 0;
515
  while(written < buf_len){
516
    do {
517
      sret = write(STDOUT_FILENO, buf + written, buf_len - written);
518
      if(sret == -1){
519
	if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
520
	  error(0, errno, "write");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
521
	  status = EX_OSERR;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
522
	}
523
	goto failure;
524
      }
525
    } while(sret == -1);
526
    
527
    if(interrupted_by_signal){
528
      goto failure;
529
    }
530
    written += (size_t)sret;
531
  }
532
  free(buf);
533
  buf = NULL;
534
  
535
  if(interrupted_by_signal){
536
    goto failure;
537
  }
538
  
539
  free(cmdline);
540
  return EXIT_SUCCESS;
541
  
542
 failure:
543
  
544
  free(buf);
545
  
546
  free(prompt);
547
  
548
  /* If usplash was never accessed, we can stop now */
549
  if(not usplash_accessed){
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
550
    return status;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
551
  }
552
  
553
  /* Close FIFO */
554
  if(fifo_fd != -1){
555
    ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
556
    if(ret == -1 and errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
557
      error(0, errno, "close");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
558
    }
559
    fifo_fd = -1;
560
  }
561
  
562
  /* Close output FIFO */
563
  if(outfifo_fd != -1){
564
    ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
565
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
566
      error(0, errno, "close");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
567
    }
568
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
569
  
431 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
570
  /* Create argv for new usplash*/
432 by teddy at bsnet
* plugins.d/usplash.c (main): BUG FIX: allocate space for the final
571
  char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
431 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
572
			       * sizeof(char *)); /* Count args */
573
  if(cmdline_argv == NULL){
574
    error(0, errno, "malloc");
575
    return status;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
576
  }
431 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
577
  argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
578
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
579
  /* Kill old usplash */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
580
  kill(usplash_pid, SIGTERM);
581
  sleep(2);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
582
  while(kill(usplash_pid, 0) == 0){
583
    kill(usplash_pid, SIGKILL);
584
    sleep(1);
585
  }
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
586
  
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
587
  pid_t new_usplash_pid = fork();
588
  if(new_usplash_pid == 0){
589
    /* Child; will become new usplash process */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
590
    
591
    /* 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
592
       the real user ID (_mandos) */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
593
    ret = setuid(geteuid());
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
594
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
595
      error(0, errno, "setuid");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
596
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
597
    
598
    setsid();
599
    ret = chdir("/");
24.1.148 by Björn Påhlsson
half working on-demand password and approved code
600
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
601
      error(0, errno, "chdir");
24.1.148 by Björn Påhlsson
half working on-demand password and approved code
602
      _exit(EX_OSERR);
603
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
604
/*     if(fork() != 0){ */
605
/*       _exit(EXIT_SUCCESS); */
606
/*     } */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
607
    ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
608
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
609
      error(0, errno, "dup2");
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
610
      _exit(EX_OSERR);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
611
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
612
    
613
    execv(usplash_name, cmdline_argv);
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
614
    if(not interrupted_by_signal){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
615
      error(0, errno, "execv");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
616
    }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
617
    free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
618
    free(cmdline_argv);
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
619
    _exit(EX_OSERR);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
620
  }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
621
  free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
622
  free(cmdline_argv);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
623
  sleep(2);
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
624
  if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
625
    if(errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
626
      error(0, errno, "usplash_write");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
627
    }
628
  }
629
  
630
  /* Close FIFO (again) */
373 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: only close FIFO if opened.
631
  if(fifo_fd != -1){
632
    ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
633
    if(ret == -1 and errno != EINTR){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
634
      error(0, errno, "close");
373 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: only close FIFO if opened.
635
    }
636
    fifo_fd = -1;
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
637
  }
638
  
639
  if(interrupted_by_signal){
640
    struct sigaction signal_action = { .sa_handler = SIG_DFL };
641
    sigemptyset(&signal_action.sa_mask);
642
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
643
					    &signal_action, NULL));
644
    if(ret == -1){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
645
      error(0, errno, "sigaction");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
646
    }
647
    do {
648
      ret = raise(signal_received);
649
    } while(ret != 0 and errno == EINTR);
650
    if(ret != 0){
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
651
      error(0, errno, "raise");
369 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
652
      abort();
653
    }
654
    TEMP_FAILURE_RETRY(pause());
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
655
  }
656
  
396 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
657
  return status;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
658
}