/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
 * Splashy - Read a password from splashy and output it
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
4
 * 
237.7.92 by Teddy Hogeborn
Updated year in copyright notices.
5
 * Copyright © 2008-2012 Teddy Hogeborn
6
 * Copyright © 2008-2012 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
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
25
#define _GNU_SOURCE		/* TEMP_FAILURE_RETRY(), asprintf() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
26
#include <signal.h>		/* sig_atomic_t, struct sigaction,
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
27
				   sigemptyset(), sigaddset(), SIGINT,
28
				   SIGHUP, SIGTERM, sigaction,
29
				   SIG_IGN, kill(), SIGKILL */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
30
#include <stddef.h>		/* NULL */
31
#include <stdlib.h>		/* getenv() */
237.7.33 by Teddy Hogeborn
Merge from Björn.
32
#include <stdio.h>		/* asprintf(), vasprintf(), vprintf(),
33
				   fprintf() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
34
#include <stdlib.h>		/* EXIT_FAILURE, free(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
35
				   EXIT_SUCCESS */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
36
#include <sys/types.h>		/* pid_t, DIR, struct dirent,
37
				   ssize_t */
38
#include <dirent.h>		/* opendir(), readdir(), closedir() */
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
39
#include <inttypes.h>		/* intmax_t, strtoimax() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
40
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
41
#include <iso646.h>		/* not, or, and */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
42
#include <unistd.h>		/* readlink(), fork(), execl(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
43
				   sleep(), dup2() STDERR_FILENO,
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
44
				   STDOUT_FILENO, _exit(),
45
				   pause() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
46
#include <string.h>		/* memcmp(), strerror() */
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
47
#include <errno.h>		/* errno, EACCES, ENOTDIR, ELOOP,
48
				   ENOENT, ENAMETOOLONG, EMFILE,
49
				   ENFILE, ENOMEM, ENOEXEC, EINVAL,
50
				   E2BIG, EFAULT, EIO, ETXTBSY,
51
				   EISDIR, ELIBBAD, EPERM, EINTR,
52
				   ECHILD */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
53
#include <error.h>		/* error() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
54
#include <sys/wait.h>		/* waitpid(), WIFEXITED(),
55
				   WEXITSTATUS() */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
56
#include <sysexits.h>		/* EX_OSERR, EX_OSFILE,
57
				   EX_UNAVAILABLE */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
58
#include <stdarg.h>		/* va_list, va_start(), ... */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
59
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
60
sig_atomic_t interrupted_by_signal = 0;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
61
int signal_received;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
62
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
63
/* Function to use when printing errors */
237.7.81 by teddy at bsnet
* plugins.d/splashy.c (error_plus): Check format string.
64
__attribute__((format (gnu_printf, 3, 4)))
237.7.33 by Teddy Hogeborn
Merge from Björn.
65
void error_plus(int status, int errnum, const char *formatstring,
66
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
67
  va_list ap;
68
  char *text;
69
  int ret;
70
  
71
  va_start(ap, formatstring);
72
  ret = vasprintf(&text, formatstring, ap);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
73
  if(ret == -1){
237.7.33 by Teddy Hogeborn
Merge from Björn.
74
    fprintf(stderr, "Mandos plugin %s: ",
75
	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
76
    vfprintf(stderr, formatstring, ap);
77
    fprintf(stderr, ": ");
78
    fprintf(stderr, "%s\n", strerror(errnum));
79
    error(status, errno, "vasprintf while printing error");
80
    return;
81
  }
82
  fprintf(stderr, "Mandos plugin ");
83
  error(status, errnum, "%s", text);
84
  free(text);
85
}
86
87
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
88
static void termination_handler(int signum){
89
  if(interrupted_by_signal){
90
    return;
91
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
92
  interrupted_by_signal = 1;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
93
  signal_received = signum;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
94
}
95
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
96
int main(__attribute__((unused))int argc,
97
	 __attribute__((unused))char **argv){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
98
  int ret = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
99
  char *prompt = NULL;
100
  DIR *proc_dir = NULL;
101
  pid_t splashy_pid = 0;
102
  pid_t splashy_command_pid = 0;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
103
  int exitstatus = EXIT_FAILURE;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
104
  
105
  /* Create prompt string */
106
  {
107
    const char *const cryptsource = getenv("cryptsource");
108
    const char *const crypttarget = getenv("crypttarget");
109
    const char *const prompt_start = "getpass "
110
      "Enter passphrase to unlock the disk";
111
    
112
    if(cryptsource == NULL){
113
      if(crypttarget == NULL){
114
	ret = asprintf(&prompt, "%s: ", prompt_start);
115
      } else {
116
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
117
		       crypttarget);
118
      }
119
    } else {
120
      if(crypttarget == NULL){
121
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
122
      } else {
123
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
124
		       cryptsource, crypttarget);
125
      }
126
    }
127
    if(ret == -1){
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
128
      prompt = NULL;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
129
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
130
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
131
    }
132
  }
133
  
134
  /* Find splashy process */
135
  {
136
    const char splashy_name[] = "/sbin/splashy";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
137
    proc_dir = opendir("/proc");
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
138
    if(proc_dir == NULL){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
139
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
140
      error_plus(0, errno, "opendir");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
141
      switch(e){
142
      case EACCES:
143
      case ENOTDIR:
144
      case ELOOP:
145
      case ENOENT:
146
      default:
147
	exitstatus = EX_OSFILE;
148
	break;
149
      case ENAMETOOLONG:
150
      case EMFILE:
151
      case ENFILE:
152
      case ENOMEM:
153
	exitstatus = EX_OSERR;
154
	break;
155
      }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
156
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
157
    }
158
    for(struct dirent *proc_ent = readdir(proc_dir);
159
	proc_ent != NULL;
160
	proc_ent = readdir(proc_dir)){
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
161
      pid_t pid;
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
162
      {
163
	intmax_t tmpmax;
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
164
	char *tmp;
165
	errno = 0;
166
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
167
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
168
	   or tmpmax != (pid_t)tmpmax){
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
169
	  /* Not a process */
170
	  continue;
171
	}
172
	pid = (pid_t)tmpmax;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
173
      }
174
      /* Find the executable name by doing readlink() on the
175
	 /proc/<pid>/exe link */
176
      char exe_target[sizeof(splashy_name)];
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
177
      ssize_t sret;
178
      {
179
	char *exe_link;
180
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
181
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
182
	  error_plus(0, errno, "asprintf");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
183
	  exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
184
	  goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
185
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
186
	
187
	/* Check that it refers to a symlink owned by root:root */
188
	struct stat exe_stat;
189
	ret = lstat(exe_link, &exe_stat);
190
	if(ret == -1){
237.2.25 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
191
	  if(errno == ENOENT){
192
	    free(exe_link);
193
	    continue;
194
	  }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
195
	  int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
196
	  error_plus(0, errno, "lstat");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
197
	  free(exe_link);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
198
	  switch(e){
199
	  case EACCES:
200
	  case ENOTDIR:
201
	  case ELOOP:
202
	  default:
203
	    exitstatus = EX_OSFILE;
204
	    break;
205
	  case ENAMETOOLONG:
206
	    exitstatus = EX_OSERR;
207
	    break;
208
	  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
209
	  goto failure;
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
210
	}
211
	if(not S_ISLNK(exe_stat.st_mode)
212
	   or exe_stat.st_uid != 0
213
	   or exe_stat.st_gid != 0){
214
	  free(exe_link);
215
	  continue;
216
	}
217
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
218
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
219
	free(exe_link);
220
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
221
      if((sret == ((ssize_t)sizeof(exe_target)-1))
222
	 and (memcmp(splashy_name, exe_target,
223
		     sizeof(exe_target)-1) == 0)){
224
	splashy_pid = pid;
225
	break;
226
      }
227
    }
228
    closedir(proc_dir);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
229
    proc_dir = NULL;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
230
  }
231
  if(splashy_pid == 0){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
232
    exitstatus = EX_UNAVAILABLE;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
233
    goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
234
  }
235
  
236
  /* Set up the signal handler */
237
  {
238
    struct sigaction old_action,
239
      new_action = { .sa_handler = termination_handler,
240
		     .sa_flags = 0 };
241
    sigemptyset(&new_action.sa_mask);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
242
    ret = sigaddset(&new_action.sa_mask, SIGINT);
243
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
244
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
245
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
246
      goto failure;
247
    }
248
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
249
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
250
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
251
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
252
      goto failure;
253
    }
254
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
255
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
256
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
257
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
258
      goto failure;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
259
    }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
260
    ret = sigaction(SIGINT, NULL, &old_action);
261
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
262
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
263
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
264
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
265
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
266
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
267
      ret = sigaction(SIGINT, &new_action, NULL);
268
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
269
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
270
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
271
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
272
      }
273
    }
274
    ret = sigaction(SIGHUP, NULL, &old_action);
275
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
276
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
277
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
278
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
279
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
280
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
281
      ret = sigaction(SIGHUP, &new_action, NULL);
282
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
283
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
284
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
285
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
286
      }
287
    }
288
    ret = sigaction(SIGTERM, NULL, &old_action);
289
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
290
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
291
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
292
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
293
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
294
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
295
      ret = sigaction(SIGTERM, &new_action, NULL);
296
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
297
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
298
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
299
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
300
      }
301
    }
302
  }
303
  
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
304
  if(interrupted_by_signal){
305
    goto failure;
306
  }
307
  
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
308
  /* Fork off the splashy command to prompt for password */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
309
  splashy_command_pid = fork();
310
  if(splashy_command_pid != 0 and interrupted_by_signal){
311
    goto failure;
312
  }
313
  if(splashy_command_pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
314
    error_plus(0, errno, "fork");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
315
    exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
316
    goto failure;
317
  }
318
  /* Child */
319
  if(splashy_command_pid == 0){
320
    if(not interrupted_by_signal){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
321
      const char splashy_command[] = "/sbin/splashy_update";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
322
      execl(splashy_command, splashy_command, prompt, (char *)NULL);
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
323
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
324
      error_plus(0, errno, "execl");
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
325
      switch(e){
326
      case EACCES:
327
      case ENOENT:
328
      case ENOEXEC:
329
      case EINVAL:
330
	_exit(EX_UNAVAILABLE);
331
      case ENAMETOOLONG:
332
      case E2BIG:
333
      case ENOMEM:
334
      case EFAULT:
335
      case EIO:
336
      case EMFILE:
337
      case ENFILE:
338
      case ETXTBSY:
339
      default:
340
	_exit(EX_OSERR);
341
      case ENOTDIR:
342
      case ELOOP:
343
      case EISDIR:
237.7.4 by Teddy Hogeborn
* plugins.d/splashy.c (main): Bug fix: Only use ELIBBAD if defined.
344
#ifdef ELIBBAD
345
      case ELIBBAD:		/* Linux only */
346
#endif
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
347
      case EPERM:
348
	_exit(EX_OSFILE);
349
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
350
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
351
    free(prompt);
352
    _exit(EXIT_FAILURE);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
353
  }
354
  
355
  /* Parent */
356
  free(prompt);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
357
  prompt = NULL;
358
  
359
  if(interrupted_by_signal){
360
    goto failure;
361
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
362
  
363
  /* Wait for command to complete */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
364
  {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
365
    int status;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
366
    do {
367
      ret = waitpid(splashy_command_pid, &status, 0);
368
    } while(ret == -1 and errno == EINTR
369
	    and not interrupted_by_signal);
370
    if(interrupted_by_signal){
371
      goto failure;
372
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
373
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
374
      error_plus(0, errno, "waitpid");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
375
      if(errno == ECHILD){
376
	splashy_command_pid = 0;
377
      }
378
    } else {
379
      /* The child process has exited */
380
      splashy_command_pid = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
381
      if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
382
	return EXIT_SUCCESS;
383
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
384
    }
385
  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
386
  
387
 failure:
388
  
389
  free(prompt);
390
  
391
  if(proc_dir != NULL){
392
    TEMP_FAILURE_RETRY(closedir(proc_dir));
393
  }
394
  
395
  if(splashy_command_pid != 0){
396
    TEMP_FAILURE_RETRY(kill(splashy_command_pid, SIGTERM));
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
397
    
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
398
    TEMP_FAILURE_RETRY(kill(splashy_pid, SIGTERM));
399
    sleep(2);
400
    while(TEMP_FAILURE_RETRY(kill(splashy_pid, 0)) == 0){
401
      TEMP_FAILURE_RETRY(kill(splashy_pid, SIGKILL));
402
      sleep(1);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
403
    }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
404
    pid_t new_splashy_pid = (pid_t)TEMP_FAILURE_RETRY(fork());
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
405
    if(new_splashy_pid == 0){
406
      /* Child; will become new splashy process */
407
      
408
      /* Make the effective user ID (root) the only user ID instead of
409
	 the real user ID (_mandos) */
410
      ret = setuid(geteuid());
411
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
412
	error_plus(0, errno, "setuid");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
413
      }
414
      
415
      setsid();
416
      ret = chdir("/");
417
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
418
	error_plus(0, errno, "chdir");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
419
      }
420
/*       if(fork() != 0){ */
421
/* 	_exit(EXIT_SUCCESS); */
422
/*       } */
423
      ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
424
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
425
	error_plus(0, errno, "dup2");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
426
	_exit(EX_OSERR);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
427
      }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
428
      
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
429
      execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
430
      {
431
	int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
432
	error_plus(0, errno, "execl");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
433
	switch(e){
434
	case EACCES:
435
	case ENOENT:
436
	case ENOEXEC:
437
	default:
438
	  _exit(EX_UNAVAILABLE);
439
	case ENAMETOOLONG:
440
	case E2BIG:
441
	case ENOMEM:
442
	  _exit(EX_OSERR);
443
	case ENOTDIR:
444
	case ELOOP:
445
	  _exit(EX_OSFILE);
446
	}
447
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
448
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
449
  }
450
  
451
  if(interrupted_by_signal){
452
    struct sigaction signal_action;
453
    sigemptyset(&signal_action.sa_mask);
454
    signal_action.sa_handler = SIG_DFL;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
455
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
456
					    &signal_action, NULL));
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
457
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
458
      error_plus(0, errno, "sigaction");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
459
    }
460
    do {
461
      ret = raise(signal_received);
462
    } while(ret != 0 and errno == EINTR);
463
    if(ret != 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
464
      error_plus(0, errno, "raise");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
465
      abort();
466
    }
467
    TEMP_FAILURE_RETRY(pause());
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
468
  }
469
  
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
470
  return exitstatus;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
471
}