/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
 * 
237.7.447 by Teddy Hogeborn
Update copyright year to 2017
5
 * Copyright © 2008-2017 Teddy Hogeborn
6
 * Copyright © 2008-2017 Björn Påhlsson
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
7
 * 
237.7.455 by Teddy Hogeborn
Alter copyright notices slightly. Actual license is unchanged!
8
 * This file is part of Mandos.
9
 * 
10
 * Mandos is free software: you can redistribute it and/or modify it
11
 * under the terms of the GNU General Public License as published by
12
 * the Free Software Foundation, either version 3 of the License, or
13
 * (at your option) any later version.
14
 * 
15
 * Mandos is distributed in the hope that it will be useful, but
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
16
 * WITHOUT ANY WARRANTY; without even the implied warranty of
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18
 * General Public License for more details.
19
 * 
20
 * You should have received a copy of the GNU General Public License
237.7.455 by Teddy Hogeborn
Alter copyright notices slightly. Actual license is unchanged!
21
 * along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
22
 * 
237.11.2 by Teddy Hogeborn
Change "fukt.bsnet.se" to "recompile.se" throughout.
23
 * Contact the authors at <mandos@recompile.se>.
237.1.2 by Teddy Hogeborn
Further steps towards a D-Bus server interface, plus minor syntax
24
 */
25
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
26
#define _GNU_SOURCE		/* TEMP_FAILURE_RETRY(), asprintf() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
27
#include <signal.h>		/* sig_atomic_t, struct sigaction,
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
28
				   sigemptyset(), sigaddset(), SIGINT,
29
				   SIGHUP, SIGTERM, sigaction,
30
				   SIG_IGN, kill(), SIGKILL */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
31
#include <stddef.h>		/* NULL */
32
#include <stdlib.h>		/* getenv() */
237.7.33 by Teddy Hogeborn
Merge from Björn.
33
#include <stdio.h>		/* asprintf(), vasprintf(), vprintf(),
34
				   fprintf() */
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
35
#include <stdlib.h>		/* EXIT_FAILURE, free(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
36
				   EXIT_SUCCESS */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
37
#include <sys/types.h>		/* pid_t, DIR, struct dirent,
38
				   ssize_t */
39
#include <dirent.h>		/* opendir(), readdir(), closedir() */
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
40
#include <inttypes.h>		/* intmax_t, strtoimax() */
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
41
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK */
42
#include <iso646.h>		/* not, or, and */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
43
#include <unistd.h>		/* readlink(), fork(), execl(),
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
44
				   sleep(), dup2() STDERR_FILENO,
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
45
				   STDOUT_FILENO, _exit(),
46
				   pause() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
47
#include <string.h>		/* memcmp(), strerror() */
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
48
#include <errno.h>		/* errno, EACCES, ENOTDIR, ELOOP,
49
				   ENOENT, ENAMETOOLONG, EMFILE,
50
				   ENFILE, ENOMEM, ENOEXEC, EINVAL,
51
				   E2BIG, EFAULT, EIO, ETXTBSY,
52
				   EISDIR, ELIBBAD, EPERM, EINTR,
53
				   ECHILD */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
54
#include <error.h>		/* error() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
55
#include <sys/wait.h>		/* waitpid(), WIFEXITED(),
56
				   WEXITSTATUS() */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
57
#include <sysexits.h>		/* EX_OSERR, EX_OSFILE,
58
				   EX_UNAVAILABLE */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
59
#include <stdarg.h>		/* va_list, va_start(), ... */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
60
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
61
sig_atomic_t interrupted_by_signal = 0;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
62
int signal_received;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
63
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
64
/* Function to use when printing errors */
237.7.81 by teddy at bsnet
* plugins.d/splashy.c (error_plus): Check format string.
65
__attribute__((format (gnu_printf, 3, 4)))
237.7.33 by Teddy Hogeborn
Merge from Björn.
66
void error_plus(int status, int errnum, const char *formatstring,
67
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
68
  va_list ap;
69
  char *text;
70
  int ret;
71
  
72
  va_start(ap, formatstring);
73
  ret = vasprintf(&text, formatstring, ap);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
74
  if(ret == -1){
237.7.33 by Teddy Hogeborn
Merge from Björn.
75
    fprintf(stderr, "Mandos plugin %s: ",
76
	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
77
    vfprintf(stderr, formatstring, ap);
78
    fprintf(stderr, ": ");
79
    fprintf(stderr, "%s\n", strerror(errnum));
80
    error(status, errno, "vasprintf while printing error");
81
    return;
82
  }
83
  fprintf(stderr, "Mandos plugin ");
84
  error(status, errnum, "%s", text);
85
  free(text);
86
}
87
88
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
89
static void termination_handler(int signum){
90
  if(interrupted_by_signal){
91
    return;
92
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
93
  interrupted_by_signal = 1;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
94
  signal_received = signum;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
95
}
96
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
97
int main(__attribute__((unused))int argc,
98
	 __attribute__((unused))char **argv){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
99
  int ret = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
100
  char *prompt = NULL;
101
  DIR *proc_dir = NULL;
102
  pid_t splashy_pid = 0;
103
  pid_t splashy_command_pid = 0;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
104
  int exitstatus = EXIT_FAILURE;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
105
  
106
  /* Create prompt string */
107
  {
108
    const char *const cryptsource = getenv("cryptsource");
109
    const char *const crypttarget = getenv("crypttarget");
110
    const char *const prompt_start = "getpass "
111
      "Enter passphrase to unlock the disk";
112
    
113
    if(cryptsource == NULL){
114
      if(crypttarget == NULL){
115
	ret = asprintf(&prompt, "%s: ", prompt_start);
116
      } else {
117
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
118
		       crypttarget);
119
      }
120
    } else {
121
      if(crypttarget == NULL){
122
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
123
      } else {
124
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
125
		       cryptsource, crypttarget);
126
      }
127
    }
128
    if(ret == -1){
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
129
      prompt = NULL;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
130
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
131
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
132
    }
133
  }
134
  
135
  /* Find splashy process */
136
  {
137
    const char splashy_name[] = "/sbin/splashy";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
138
    proc_dir = opendir("/proc");
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
139
    if(proc_dir == NULL){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
140
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
141
      error_plus(0, errno, "opendir");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
142
      switch(e){
143
      case EACCES:
144
      case ENOTDIR:
145
      case ELOOP:
146
      case ENOENT:
147
      default:
148
	exitstatus = EX_OSFILE;
149
	break;
150
      case ENAMETOOLONG:
151
      case EMFILE:
152
      case ENFILE:
153
      case ENOMEM:
154
	exitstatus = EX_OSERR;
155
	break;
156
      }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
157
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
158
    }
159
    for(struct dirent *proc_ent = readdir(proc_dir);
160
	proc_ent != NULL;
161
	proc_ent = readdir(proc_dir)){
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
162
      pid_t pid;
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
163
      {
164
	intmax_t tmpmax;
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
165
	char *tmp;
166
	errno = 0;
167
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
168
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
169
	   or tmpmax != (pid_t)tmpmax){
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
170
	  /* Not a process */
171
	  continue;
172
	}
173
	pid = (pid_t)tmpmax;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
174
      }
175
      /* Find the executable name by doing readlink() on the
176
	 /proc/<pid>/exe link */
177
      char exe_target[sizeof(splashy_name)];
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
178
      ssize_t sret;
179
      {
180
	char *exe_link;
181
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
182
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
183
	  error_plus(0, errno, "asprintf");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
184
	  exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
185
	  goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
186
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
187
	
188
	/* Check that it refers to a symlink owned by root:root */
189
	struct stat exe_stat;
190
	ret = lstat(exe_link, &exe_stat);
191
	if(ret == -1){
237.2.25 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
192
	  if(errno == ENOENT){
193
	    free(exe_link);
194
	    continue;
195
	  }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
196
	  int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
197
	  error_plus(0, errno, "lstat");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
198
	  free(exe_link);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
199
	  switch(e){
200
	  case EACCES:
201
	  case ENOTDIR:
202
	  case ELOOP:
203
	  default:
204
	    exitstatus = EX_OSFILE;
205
	    break;
206
	  case ENAMETOOLONG:
207
	    exitstatus = EX_OSERR;
208
	    break;
209
	  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
210
	  goto failure;
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
211
	}
212
	if(not S_ISLNK(exe_stat.st_mode)
213
	   or exe_stat.st_uid != 0
214
	   or exe_stat.st_gid != 0){
215
	  free(exe_link);
216
	  continue;
217
	}
218
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
219
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
220
	free(exe_link);
221
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
222
      if((sret == ((ssize_t)sizeof(exe_target)-1))
223
	 and (memcmp(splashy_name, exe_target,
224
		     sizeof(exe_target)-1) == 0)){
225
	splashy_pid = pid;
226
	break;
227
      }
228
    }
229
    closedir(proc_dir);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
230
    proc_dir = NULL;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
231
  }
232
  if(splashy_pid == 0){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
233
    exitstatus = EX_UNAVAILABLE;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
234
    goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
235
  }
236
  
237
  /* Set up the signal handler */
238
  {
239
    struct sigaction old_action,
240
      new_action = { .sa_handler = termination_handler,
241
		     .sa_flags = 0 };
242
    sigemptyset(&new_action.sa_mask);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
243
    ret = sigaddset(&new_action.sa_mask, SIGINT);
244
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
245
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
246
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
247
      goto failure;
248
    }
249
    ret = sigaddset(&new_action.sa_mask, SIGHUP);
250
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
251
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
252
      exitstatus = EX_OSERR;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
253
      goto failure;
254
    }
255
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
256
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
257
      error_plus(0, errno, "sigaddset");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
258
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
259
      goto failure;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
260
    }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
261
    ret = sigaction(SIGINT, NULL, &old_action);
262
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
263
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
264
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
265
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
266
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
267
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
268
      ret = sigaction(SIGINT, &new_action, NULL);
269
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
270
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
271
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
272
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
273
      }
274
    }
275
    ret = sigaction(SIGHUP, NULL, &old_action);
276
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
277
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
278
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
279
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
280
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
281
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
282
      ret = sigaction(SIGHUP, &new_action, NULL);
283
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
284
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
285
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
286
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
287
      }
288
    }
289
    ret = sigaction(SIGTERM, NULL, &old_action);
290
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
291
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
292
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
293
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
294
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
295
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
296
      ret = sigaction(SIGTERM, &new_action, NULL);
297
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
298
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
299
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
300
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
301
      }
302
    }
303
  }
304
  
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
305
  if(interrupted_by_signal){
306
    goto failure;
307
  }
308
  
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
309
  /* Fork off the splashy command to prompt for password */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
310
  splashy_command_pid = fork();
311
  if(splashy_command_pid != 0 and interrupted_by_signal){
312
    goto failure;
313
  }
314
  if(splashy_command_pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
315
    error_plus(0, errno, "fork");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
316
    exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
317
    goto failure;
318
  }
319
  /* Child */
320
  if(splashy_command_pid == 0){
321
    if(not interrupted_by_signal){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
322
      const char splashy_command[] = "/sbin/splashy_update";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
323
      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
324
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
325
      error_plus(0, errno, "execl");
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
326
      switch(e){
327
      case EACCES:
328
      case ENOENT:
329
      case ENOEXEC:
330
      case EINVAL:
331
	_exit(EX_UNAVAILABLE);
332
      case ENAMETOOLONG:
333
      case E2BIG:
334
      case ENOMEM:
335
      case EFAULT:
336
      case EIO:
337
      case EMFILE:
338
      case ENFILE:
339
      case ETXTBSY:
340
      default:
341
	_exit(EX_OSERR);
342
      case ENOTDIR:
343
      case ELOOP:
344
      case EISDIR:
237.7.4 by Teddy Hogeborn
* plugins.d/splashy.c (main): Bug fix: Only use ELIBBAD if defined.
345
#ifdef ELIBBAD
346
      case ELIBBAD:		/* Linux only */
347
#endif
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
348
      case EPERM:
349
	_exit(EX_OSFILE);
350
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
351
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
352
    free(prompt);
353
    _exit(EXIT_FAILURE);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
354
  }
355
  
356
  /* Parent */
357
  free(prompt);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
358
  prompt = NULL;
359
  
360
  if(interrupted_by_signal){
361
    goto failure;
362
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
363
  
364
  /* Wait for command to complete */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
365
  {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
366
    int status;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
367
    do {
368
      ret = waitpid(splashy_command_pid, &status, 0);
369
    } while(ret == -1 and errno == EINTR
370
	    and not interrupted_by_signal);
371
    if(interrupted_by_signal){
372
      goto failure;
373
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
374
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
375
      error_plus(0, errno, "waitpid");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
376
      if(errno == ECHILD){
377
	splashy_command_pid = 0;
378
      }
379
    } else {
380
      /* The child process has exited */
381
      splashy_command_pid = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
382
      if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
383
	return EXIT_SUCCESS;
384
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
385
    }
386
  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
387
  
388
 failure:
389
  
390
  free(prompt);
391
  
392
  if(proc_dir != NULL){
393
    TEMP_FAILURE_RETRY(closedir(proc_dir));
394
  }
395
  
396
  if(splashy_command_pid != 0){
397
    TEMP_FAILURE_RETRY(kill(splashy_command_pid, SIGTERM));
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
398
    
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
399
    TEMP_FAILURE_RETRY(kill(splashy_pid, SIGTERM));
400
    sleep(2);
401
    while(TEMP_FAILURE_RETRY(kill(splashy_pid, 0)) == 0){
402
      TEMP_FAILURE_RETRY(kill(splashy_pid, SIGKILL));
403
      sleep(1);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
404
    }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
405
    pid_t new_splashy_pid = (pid_t)TEMP_FAILURE_RETRY(fork());
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
406
    if(new_splashy_pid == 0){
407
      /* Child; will become new splashy process */
408
      
409
      /* Make the effective user ID (root) the only user ID instead of
410
	 the real user ID (_mandos) */
411
      ret = setuid(geteuid());
412
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
413
	error_plus(0, errno, "setuid");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
414
      }
415
      
416
      setsid();
417
      ret = chdir("/");
418
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
419
	error_plus(0, errno, "chdir");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
420
      }
421
/*       if(fork() != 0){ */
422
/* 	_exit(EXIT_SUCCESS); */
423
/*       } */
424
      ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
425
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
426
	error_plus(0, errno, "dup2");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
427
	_exit(EX_OSERR);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
428
      }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
429
      
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
430
      execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
431
      {
432
	int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
433
	error_plus(0, errno, "execl");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
434
	switch(e){
435
	case EACCES:
436
	case ENOENT:
437
	case ENOEXEC:
438
	default:
439
	  _exit(EX_UNAVAILABLE);
440
	case ENAMETOOLONG:
441
	case E2BIG:
442
	case ENOMEM:
443
	  _exit(EX_OSERR);
444
	case ENOTDIR:
445
	case ELOOP:
446
	  _exit(EX_OSFILE);
447
	}
448
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
449
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
450
  }
451
  
452
  if(interrupted_by_signal){
453
    struct sigaction signal_action;
454
    sigemptyset(&signal_action.sa_mask);
455
    signal_action.sa_handler = SIG_DFL;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
456
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
457
					    &signal_action, NULL));
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
458
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
459
      error_plus(0, errno, "sigaction");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
460
    }
461
    do {
462
      ret = raise(signal_received);
463
    } while(ret != 0 and errno == EINTR);
464
    if(ret != 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
465
      error_plus(0, errno, "raise");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
466
      abort();
467
    }
468
    TEMP_FAILURE_RETRY(pause());
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
469
  }
470
  
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
471
  return exitstatus;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
472
}