/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
 * 
237.7.14 by Teddy Hogeborn
Update copyright year to "2011" wherever appropriate.
5
 * Copyright © 2008-2011 Teddy Hogeborn
6
 * Copyright © 2008-2011 Björn Påhlsson
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
7
 * 
8
 * This program is free software: you can redistribute it and/or
9
 * modify it under the terms of the GNU General Public License as
10
 * published by the Free Software Foundation, either version 3 of the
11
 * License, or (at your option) any later version.
12
 * 
13
 * This program is distributed in the hope that it will be useful, but
14
 * WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * General Public License for more details.
17
 * 
18
 * You should have received a copy of the GNU General Public License
19
 * along with this program.  If not, see
20
 * <http://www.gnu.org/licenses/>.
21
 * 
237.11.2 by Teddy Hogeborn
Change "fukt.bsnet.se" to "recompile.se" throughout.
22
 * Contact the authors at <mandos@recompile.se>.
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
23
 */
24
237.2.132 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 */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
38
#include <string.h>		/* strlen(), memcmp(), strerror() */
237.7.33 by Teddy Hogeborn
Merge from Björn.
39
#include <stdio.h>		/* asprintf(), vasprintf(), vprintf(),
40
				   fprintf() */
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
41
#include <unistd.h>		/* close(), write(), readlink(),
42
				   read(), STDOUT_FILENO, sleep(),
43
				   fork(), setuid(), geteuid(),
44
				   setsid(), chdir(), dup2(),
45
				   STDERR_FILENO, execv() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
46
#include <stdlib.h>		/* free(), EXIT_FAILURE, realloc(),
24.1.151 by Björn Påhlsson
New graphical boot supported: Plymouth
47
				   EXIT_SUCCESS, malloc(), _exit(),
48
				   getenv() */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
49
#include <dirent.h>		/* opendir(), readdir(), closedir() */
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
50
#include <inttypes.h>		/* intmax_t, strtoimax() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
51
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
52
#include <sysexits.h>		/* EX_OSERR, EX_UNAVAILABLE */
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
53
#include <argz.h>		/* argz_count(), argz_extract() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
54
#include <stdarg.h>		/* va_list, va_start(), ... */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
55
56
sig_atomic_t interrupted_by_signal = 0;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
57
int signal_received;
58
const char usplash_name[] = "/sbin/usplash";
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
59
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
60
/* Function to use when printing errors */
237.7.33 by Teddy Hogeborn
Merge from Björn.
61
void error_plus(int status, int errnum, const char *formatstring,
62
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
63
  va_list ap;
64
  char *text;
65
  int ret;
66
  
67
  va_start(ap, formatstring);
68
  ret = vasprintf(&text, formatstring, ap);
69
  if (ret == -1){
237.7.33 by Teddy Hogeborn
Merge from Björn.
70
    fprintf(stderr, "Mandos plugin %s: ",
71
	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
72
    vfprintf(stderr, formatstring, ap);
73
    fprintf(stderr, ": ");
74
    fprintf(stderr, "%s\n", strerror(errnum));
75
    error(status, errno, "vasprintf while printing error");
76
    return;
77
  }
78
  fprintf(stderr, "Mandos plugin ");
79
  error(status, errnum, "%s", text);
80
  free(text);
81
}
82
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
83
static void termination_handler(int signum){
84
  if(interrupted_by_signal){
85
    return;
86
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
87
  interrupted_by_signal = 1;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
88
  signal_received = signum;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
89
}
90
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
91
static bool usplash_write(int *fifo_fd_r,
92
			  const char *cmd, const char *arg){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
93
  /* 
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
94
   * usplash_write(&fd, "TIMEOUT", "15") will write "TIMEOUT 15\0"
95
   * usplash_write(&fd, "PULSATE", NULL) will write "PULSATE\0"
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
96
   * SEE ALSO
97
   *         usplash_write(8)
98
   */
99
  int ret;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
100
  if(*fifo_fd_r == -1){
101
    ret = open("/dev/.initramfs/usplash_fifo", O_WRONLY);
102
    if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
103
      return false;
104
    }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
105
    *fifo_fd_r = ret;
106
  }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
107
  
108
  const char *cmd_line;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
109
  size_t cmd_line_len;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
110
  char *cmd_line_alloc = NULL;
111
  if(arg == NULL){
112
    cmd_line = cmd;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
113
    cmd_line_len = strlen(cmd) + 1;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
114
  } else {
115
    do {
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
116
      ret = asprintf(&cmd_line_alloc, "%s %s", cmd, arg);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
117
      if(ret == -1){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
118
	int e = errno;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
119
	TEMP_FAILURE_RETRY(close(*fifo_fd_r));
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
120
	errno = e;
121
	return false;
122
      }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
123
    } while(ret == -1);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
124
    cmd_line = cmd_line_alloc;
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
125
    cmd_line_len = (size_t)ret + 1;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
126
  }
127
  
128
  size_t written = 0;
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
129
  ssize_t sret = 0;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
130
  while(written < cmd_line_len){
131
    sret = write(*fifo_fd_r, cmd_line + written,
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
132
		 cmd_line_len - written);
133
    if(sret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
134
      int e = errno;
135
      TEMP_FAILURE_RETRY(close(*fifo_fd_r));
136
      free(cmd_line_alloc);
137
      errno = e;
138
      return false;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
139
    }
237.3.2 by Mooie
Fixed warnings in the 64 bit build. Added explicit cast to int for
140
    written += (size_t)sret;
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
141
  }
142
  free(cmd_line_alloc);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
143
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
144
  return true;
145
}
146
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
147
/* Create prompt string */
148
char *makeprompt(void){
149
  int ret = 0;
150
  char *prompt;
151
  const char *const cryptsource = getenv("cryptsource");
152
  const char *const crypttarget = getenv("crypttarget");
153
  const char prompt_start[] = "Enter passphrase to unlock the disk";
154
  
155
  if(cryptsource == NULL){
156
    if(crypttarget == NULL){
157
      ret = asprintf(&prompt, "%s: ", prompt_start);
158
    } else {
159
      ret = asprintf(&prompt, "%s (%s): ", prompt_start,
160
		     crypttarget);
161
    }
162
  } else {
163
    if(crypttarget == NULL){
164
      ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
165
    } else {
166
      ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
167
		     cryptsource, crypttarget);
168
    }
169
  }
170
  if(ret == -1){
171
    return NULL;
172
  }
173
  return prompt;
174
}
175
176
pid_t find_usplash(char **cmdline_r, size_t *cmdline_len_r){
177
  int ret = 0;
178
  ssize_t sret = 0;
179
  char *cmdline = NULL;
180
  size_t cmdline_len = 0;
181
  DIR *proc_dir = opendir("/proc");
182
  if(proc_dir == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
183
    error_plus(0, errno, "opendir");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
184
    return -1;
185
  }
186
  errno = 0;
187
  for(struct dirent *proc_ent = readdir(proc_dir);
188
      proc_ent != NULL;
189
      proc_ent = readdir(proc_dir)){
190
    pid_t pid;
191
    {
192
      intmax_t tmpmax;
193
      char *tmp;
194
      tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
195
      if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
196
	 or tmpmax != (pid_t)tmpmax){
197
	/* Not a process */
198
	errno = 0;
199
	continue;
200
      }
201
      pid = (pid_t)tmpmax;
202
    }
203
    /* Find the executable name by doing readlink() on the
204
       /proc/<pid>/exe link */
205
    char exe_target[sizeof(usplash_name)];
206
    {
207
      /* create file name string */
208
      char *exe_link;
209
      ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
210
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
211
	error_plus(0, errno, "asprintf");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
212
	goto fail_find_usplash;
213
      }
214
      
215
      /* Check that it refers to a symlink owned by root:root */
216
      struct stat exe_stat;
217
      ret = lstat(exe_link, &exe_stat);
218
      if(ret == -1){
219
	if(errno == ENOENT){
220
	  free(exe_link);
221
	  continue;
222
	}
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
223
	error_plus(0, errno, "lstat");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
224
	free(exe_link);
225
	goto fail_find_usplash;
226
      }
227
      if(not S_ISLNK(exe_stat.st_mode)
228
	 or exe_stat.st_uid != 0
229
	 or exe_stat.st_gid != 0){
230
	free(exe_link);
231
	continue;
232
      }
233
	
234
      sret = readlink(exe_link, exe_target, sizeof(exe_target));
235
      free(exe_link);
236
    }
237
    /* Compare executable name */
238
    if((sret != ((ssize_t)sizeof(exe_target)-1))
239
       or (memcmp(usplash_name, exe_target,
240
		  sizeof(exe_target)-1) != 0)){
241
      /* Not it */
242
      continue;
243
    }
244
    /* Found usplash */
245
    /* Read and save the command line of usplash in "cmdline" */
246
    {
247
      /* Open /proc/<pid>/cmdline  */
248
      int cl_fd;
249
      {
250
	char *cmdline_filename;
251
	ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
252
		       proc_ent->d_name);
253
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
254
	  error_plus(0, errno, "asprintf");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
255
	  goto fail_find_usplash;
256
	}
257
	cl_fd = open(cmdline_filename, O_RDONLY);
258
	free(cmdline_filename);
259
	if(cl_fd == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
260
	  error_plus(0, errno, "open");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
261
	  goto fail_find_usplash;
262
	}
263
      }
264
      size_t cmdline_allocated = 0;
265
      char *tmp;
266
      const size_t blocksize = 1024;
267
      do {
268
	/* Allocate more space? */
269
	if(cmdline_len + blocksize > cmdline_allocated){
270
	  tmp = realloc(cmdline, cmdline_allocated + blocksize);
271
	  if(tmp == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
272
	    error_plus(0, errno, "realloc");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
273
	    close(cl_fd);
274
	    goto fail_find_usplash;
275
	  }
276
	  cmdline = tmp;
277
	  cmdline_allocated += blocksize;
278
	}
279
	/* Read data */
280
	sret = read(cl_fd, cmdline + cmdline_len,
281
		    cmdline_allocated - cmdline_len);
282
	if(sret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
283
	  error_plus(0, errno, "read");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
284
	  close(cl_fd);
285
	  goto fail_find_usplash;
286
	}
287
	cmdline_len += (size_t)sret;
288
      } while(sret != 0);
289
      ret = close(cl_fd);
290
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
291
	error_plus(0, errno, "close");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
292
	goto fail_find_usplash;
293
      }
294
    }
295
    /* Close directory */
296
    ret = closedir(proc_dir);
297
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
298
      error_plus(0, errno, "closedir");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
299
      goto fail_find_usplash;
300
    }
301
    /* Success */
302
    *cmdline_r = cmdline;
303
    *cmdline_len_r = cmdline_len;
304
    return pid;
305
  }
306
  
307
 fail_find_usplash:
308
  
309
  free(cmdline);
310
  if(proc_dir != NULL){
311
    int e = errno;
312
    closedir(proc_dir);
313
    errno = e;
314
  }
315
  return 0;
316
}
317
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
318
int main(__attribute__((unused))int argc,
319
	 __attribute__((unused))char **argv){
320
  int ret = 0;
321
  ssize_t sret;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
322
  int fifo_fd = -1;
323
  int outfifo_fd = -1;
324
  char *buf = NULL;
325
  size_t buf_len = 0;
326
  pid_t usplash_pid = -1;
327
  bool usplash_accessed = false;
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
328
  int status = EXIT_FAILURE;	/* Default failure exit status */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
329
  
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
330
  char *prompt = makeprompt();
331
  if(prompt == NULL){
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
332
    status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
333
    goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
334
  }
335
  
336
  /* Find usplash process */
337
  char *cmdline = NULL;
338
  size_t cmdline_len = 0;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
339
  usplash_pid = find_usplash(&cmdline, &cmdline_len);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
340
  if(usplash_pid == 0){
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
341
    status = EX_UNAVAILABLE;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
342
    goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
343
  }
344
  
345
  /* Set up the signal handler */
346
  {
347
    struct sigaction old_action,
348
      new_action = { .sa_handler = termination_handler,
349
		     .sa_flags = 0 };
350
    sigemptyset(&new_action.sa_mask);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
351
    ret = sigaddset(&new_action.sa_mask, SIGINT);
352
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
353
      error_plus(0, errno, "sigaddset");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
354
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
355
      goto failure;
356
    }
357
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
358
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
359
      error_plus(0, errno, "sigaddset");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
360
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
361
      goto failure;
362
    }
363
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
364
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
365
      error_plus(0, errno, "sigaddset");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
366
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
367
      goto failure;
368
    }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
369
    ret = sigaction(SIGINT, NULL, &old_action);
370
    if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
371
      if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
372
	error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
373
	status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
374
      }
375
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
376
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
377
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
378
      ret = sigaction(SIGINT, &new_action, NULL);
379
      if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
380
	if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
381
	  error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
382
	  status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
383
	}
384
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
385
      }
386
    }
387
    ret = sigaction(SIGHUP, NULL, &old_action);
388
    if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
389
      if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
390
	error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
391
	status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
392
      }
393
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
394
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
395
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
396
      ret = sigaction(SIGHUP, &new_action, NULL);
397
      if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
398
	if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
399
	  error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
400
	  status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
401
	}
402
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
403
      }
404
    }
405
    ret = sigaction(SIGTERM, NULL, &old_action);
406
    if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
407
      if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
408
	error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
409
	status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
410
      }
411
      goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
412
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
413
    if(old_action.sa_handler != SIG_IGN){
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
414
      ret = sigaction(SIGTERM, &new_action, NULL);
415
      if(ret == -1){
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
416
	if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
417
	  error_plus(0, errno, "sigaction");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
418
	  status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
419
	}
420
	goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
421
      }
422
    }
423
  }
424
  
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
425
  usplash_accessed = true;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
426
  /* Write command to FIFO */
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
427
  if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
428
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
429
      error_plus(0, errno, "usplash_write");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
430
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
431
    }
432
    goto failure;
433
  }
434
  
435
  if(interrupted_by_signal){
436
    goto failure;
437
  }
438
  
439
  if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
440
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
441
      error_plus(0, errno, "usplash_write");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
442
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
443
    }
444
    goto failure;
445
  }
446
  
447
  if(interrupted_by_signal){
448
    goto failure;
449
  }
450
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
451
  free(prompt);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
452
  prompt = NULL;
453
  
454
  /* Read reply from usplash */
455
  /* Open FIFO */
456
  outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
457
  if(outfifo_fd == -1){
458
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
459
      error_plus(0, errno, "open");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
460
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
461
    }
462
    goto failure;
463
  }
464
  
465
  if(interrupted_by_signal){
466
    goto failure;
467
  }
468
  
469
  /* Read from FIFO */
470
  size_t buf_allocated = 0;
471
  const size_t blocksize = 1024;
472
  do {
473
    /* Allocate more space */
474
    if(buf_len + blocksize > buf_allocated){
475
      char *tmp = realloc(buf, buf_allocated + blocksize);
476
      if(tmp == NULL){
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
477
	if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
478
	  error_plus(0, errno, "realloc");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
479
	  status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
480
	}
481
	goto failure;
482
      }
483
      buf = tmp;
484
      buf_allocated += blocksize;
485
    }
486
    sret = read(outfifo_fd, buf + buf_len,
487
		buf_allocated - buf_len);
488
    if(sret == -1){
489
      if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
490
	error_plus(0, errno, "read");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
491
	status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
492
      }
493
      TEMP_FAILURE_RETRY(close(outfifo_fd));
494
      goto failure;
495
    }
496
    if(interrupted_by_signal){
497
      break;
498
    }
499
    
500
    buf_len += (size_t)sret;
501
  } while(sret != 0);
502
  ret = close(outfifo_fd);
503
  if(ret == -1){
504
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
505
      error_plus(0, errno, "close");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
506
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
507
    }
508
    goto failure;
509
  }
510
  outfifo_fd = -1;
511
  
512
  if(interrupted_by_signal){
513
    goto failure;
514
  }
515
  
516
  if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
517
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
518
      error_plus(0, errno, "usplash_write");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
519
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
520
    }
521
    goto failure;
522
  }
523
  
524
  if(interrupted_by_signal){
525
    goto failure;
526
  }
527
  
528
  ret = close(fifo_fd);
529
  if(ret == -1){
530
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
531
      error_plus(0, errno, "close");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
532
      status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
533
    }
534
    goto failure;
535
  }
536
  fifo_fd = -1;
537
  
538
  /* Print password to stdout */
539
  size_t written = 0;
540
  while(written < buf_len){
541
    do {
542
      sret = write(STDOUT_FILENO, buf + written, buf_len - written);
543
      if(sret == -1){
544
	if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
545
	  error_plus(0, errno, "write");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
546
	  status = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
547
	}
548
	goto failure;
549
      }
550
    } while(sret == -1);
551
    
552
    if(interrupted_by_signal){
553
      goto failure;
554
    }
555
    written += (size_t)sret;
556
  }
557
  free(buf);
558
  buf = NULL;
559
  
560
  if(interrupted_by_signal){
561
    goto failure;
562
  }
563
  
564
  free(cmdline);
565
  return EXIT_SUCCESS;
566
  
567
 failure:
568
  
569
  free(buf);
570
  
571
  free(prompt);
572
  
573
  /* If usplash was never accessed, we can stop now */
574
  if(not usplash_accessed){
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
575
    return status;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
576
  }
577
  
578
  /* Close FIFO */
579
  if(fifo_fd != -1){
580
    ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
581
    if(ret == -1 and errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
582
      error_plus(0, errno, "close");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
583
    }
584
    fifo_fd = -1;
585
  }
586
  
587
  /* Close output FIFO */
588
  if(outfifo_fd != -1){
589
    ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
590
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
591
      error_plus(0, errno, "close");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
592
    }
593
  }
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
594
  
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
595
  /* Create argv for new usplash*/
237.2.195 by teddy at bsnet
* plugins.d/usplash.c (main): BUG FIX: allocate space for the final
596
  char **cmdline_argv = malloc((argz_count(cmdline, cmdline_len) + 1)
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
597
			       * sizeof(char *)); /* Count args */
598
  if(cmdline_argv == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
599
    error_plus(0, errno, "malloc");
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
600
    return status;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
601
  }
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
602
  argz_extract(cmdline, cmdline_len, cmdline_argv); /* Create argv */
603
  
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
604
  /* Kill old usplash */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
605
  kill(usplash_pid, SIGTERM);
606
  sleep(2);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
607
  while(kill(usplash_pid, 0) == 0){
608
    kill(usplash_pid, SIGKILL);
609
    sleep(1);
610
  }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
611
  
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
612
  pid_t new_usplash_pid = fork();
613
  if(new_usplash_pid == 0){
614
    /* Child; will become new usplash process */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
615
    
616
    /* Make the effective user ID (root) the only user ID instead of
237.2.28 by Teddy Hogeborn
* plugin-runner.c (main): Bug fix; do not accept a "d" character after
617
       the real user ID (_mandos) */
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
618
    ret = setuid(geteuid());
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
619
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
620
      error_plus(0, errno, "setuid");
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
621
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
622
    
623
    setsid();
624
    ret = chdir("/");
24.1.148 by Björn Påhlsson
half working on-demand password and approved code
625
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
626
      error_plus(0, errno, "chdir");
24.1.148 by Björn Påhlsson
half working on-demand password and approved code
627
      _exit(EX_OSERR);
628
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
629
/*     if(fork() != 0){ */
630
/*       _exit(EXIT_SUCCESS); */
631
/*     } */
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
632
    ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
633
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
634
      error_plus(0, errno, "dup2");
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
635
      _exit(EX_OSERR);
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
636
    }
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
637
    
638
    execv(usplash_name, cmdline_argv);
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
639
    if(not interrupted_by_signal){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
640
      error_plus(0, errno, "execv");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
641
    }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
642
    free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
643
    free(cmdline_argv);
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
644
    _exit(EX_OSERR);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
645
  }
213 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: Do not free "cmdline" too soon.
646
  free(cmdline);
212 by Teddy Hogeborn
* plugins.d/usplash.c (usplash_write): Move "cmd_line_len" up.
647
  free(cmdline_argv);
210 by Teddy Hogeborn
* debian/mandos-client.postinst: Change home directory to
648
  sleep(2);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
649
  if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
650
    if(errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
651
      error_plus(0, errno, "usplash_write");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
652
    }
653
  }
654
  
655
  /* Close FIFO (again) */
237.2.136 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: only close FIFO if opened.
656
  if(fifo_fd != -1){
657
    ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
658
    if(ret == -1 and errno != EINTR){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
659
      error_plus(0, errno, "close");
237.2.136 by Teddy Hogeborn
* plugins.d/usplash.c (main): Bug fix: only close FIFO if opened.
660
    }
661
    fifo_fd = -1;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
662
  }
663
  
664
  if(interrupted_by_signal){
665
    struct sigaction signal_action = { .sa_handler = SIG_DFL };
666
    sigemptyset(&signal_action.sa_mask);
667
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
668
					    &signal_action, NULL));
669
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
670
      error_plus(0, errno, "sigaction");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
671
    }
672
    do {
673
      ret = raise(signal_received);
674
    } while(ret != 0 and errno == EINTR);
675
    if(ret != 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
676
      error_plus(0, errno, "raise");
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
677
      abort();
678
    }
679
    TEMP_FAILURE_RETRY(pause());
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
680
  }
681
  
237.2.159 by Teddy Hogeborn
* plugins.d/usplash.c: Use <sysexits.h> exit codes.
682
  return status;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
683
}