/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
 * 
237.7.807 by Teddy Hogeborn
Update copyright year
5
 * Copyright © 2008-2018, 2021-2022 Teddy Hogeborn
6
 * Copyright © 2008-2018, 2021-2022 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
237.7.781 by Teddy Hogeborn
Fix #include headers
26
#define _GNU_SOURCE		/* vasprintf(),
27
				   program_invocation_short_name,
28
				   asprintf(), TEMP_FAILURE_RETRY() */
29
#include <sys/types.h>		/* sig_atomic_t, pid_t, setuid(),
30
				   geteuid(), setsid() */
31
#include <stdarg.h>		/* va_list, va_start(), vfprintf() */
32
#include <stdio.h>		/* vasprintf(), fprintf(), stderr,
33
				   vfprintf(), asprintf() */
34
#include <errno.h>		/* program_invocation_short_name,
35
				   errno, EACCES, ENOTDIR, ELOOP,
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
36
				   ENOENT, ENAMETOOLONG, EMFILE,
37
				   ENFILE, ENOMEM, ENOEXEC, EINVAL,
38
				   E2BIG, EFAULT, EIO, ETXTBSY,
39
				   EISDIR, ELIBBAD, EPERM, EINTR,
40
				   ECHILD */
237.7.781 by Teddy Hogeborn
Fix #include headers
41
#include <string.h>		/* strerror(), memcmp() */
24.1.155 by Björn Påhlsson
mandos server: Added debuglevel that adjust at what level information
42
#include <error.h>		/* error() */
237.7.781 by Teddy Hogeborn
Fix #include headers
43
#include <stdlib.h>		/* free(), EXIT_FAILURE, getenv(),
44
				   EXIT_SUCCESS, abort() */
45
#include <stddef.h>		/* NULL */
46
#include <dirent.h>		/* DIR, opendir(), struct dirent,
47
				   readdir(), closedir() */
48
#include <sysexits.h>		/* EX_OSERR, EX_OSFILE,
49
				   EX_UNAVAILABLE */
50
#include <inttypes.h>		/* intmax_t, strtoimax() */
51
#include <iso646.h>		/* or, not, and */
52
#include <unistd.h>		/* ssize_t, readlink(), fork(),
53
				   execl(), _exit(),
54
				   TEMP_FAILURE_RETRY(), sleep(),
55
				   setuid(), geteuid(), setsid(),
56
				   chdir(), dup2(), STDERR_FILENO,
57
				   STDOUT_FILENO, pause() */
58
#include <sys/stat.h>		/* struct stat, lstat(), S_ISLNK() */
59
#include <signal.h>		/* struct sigaction, sigemptyset(),
60
				   sigaddset(), SIGINT, SIGHUP,
61
				   SIGTERM, SIG_IGN, kill(), SIGKILL,
62
				   SIG_DFL, raise() */
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
63
#include <sys/wait.h>		/* waitpid(), WIFEXITED(),
64
				   WEXITSTATUS() */
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
65
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
66
sig_atomic_t interrupted_by_signal = 0;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
67
int signal_received;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
68
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
69
/* Function to use when printing errors */
237.7.81 by teddy at bsnet
* plugins.d/splashy.c (error_plus): Check format string.
70
__attribute__((format (gnu_printf, 3, 4)))
237.7.33 by Teddy Hogeborn
Merge from Björn.
71
void error_plus(int status, int errnum, const char *formatstring,
72
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
73
  va_list ap;
74
  char *text;
75
  int ret;
76
  
77
  va_start(ap, formatstring);
78
  ret = vasprintf(&text, formatstring, ap);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
79
  if(ret == -1){
237.7.33 by Teddy Hogeborn
Merge from Björn.
80
    fprintf(stderr, "Mandos plugin %s: ",
81
	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
82
    vfprintf(stderr, formatstring, ap);
83
    fprintf(stderr, ": ");
84
    fprintf(stderr, "%s\n", strerror(errnum));
85
    error(status, errno, "vasprintf while printing error");
86
    return;
87
  }
88
  fprintf(stderr, "Mandos plugin ");
89
  error(status, errnum, "%s", text);
90
  free(text);
91
}
92
93
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
94
static void termination_handler(int signum){
95
  if(interrupted_by_signal){
96
    return;
97
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
98
  interrupted_by_signal = 1;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
99
  signal_received = signum;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
100
}
101
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
102
int main(__attribute__((unused))int argc,
103
	 __attribute__((unused))char **argv){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
104
  int ret = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
105
  char *prompt = NULL;
106
  DIR *proc_dir = NULL;
107
  pid_t splashy_pid = 0;
108
  pid_t splashy_command_pid = 0;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
109
  int exitstatus = EXIT_FAILURE;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
110
  
111
  /* Create prompt string */
112
  {
113
    const char *const cryptsource = getenv("cryptsource");
114
    const char *const crypttarget = getenv("crypttarget");
115
    const char *const prompt_start = "getpass "
116
      "Enter passphrase to unlock the disk";
117
    
118
    if(cryptsource == NULL){
119
      if(crypttarget == NULL){
120
	ret = asprintf(&prompt, "%s: ", prompt_start);
121
      } else {
122
	ret = asprintf(&prompt, "%s (%s): ", prompt_start,
123
		       crypttarget);
124
      }
125
    } else {
126
      if(crypttarget == NULL){
127
	ret = asprintf(&prompt, "%s %s: ", prompt_start, cryptsource);
128
      } else {
129
	ret = asprintf(&prompt, "%s %s (%s): ", prompt_start,
130
		       cryptsource, crypttarget);
131
      }
132
    }
133
    if(ret == -1){
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
134
      prompt = NULL;
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
135
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
136
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
137
    }
138
  }
139
  
140
  /* Find splashy process */
141
  {
142
    const char splashy_name[] = "/sbin/splashy";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
143
    proc_dir = opendir("/proc");
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
144
    if(proc_dir == NULL){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
145
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
146
      error_plus(0, errno, "opendir");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
147
      switch(e){
148
      case EACCES:
149
      case ENOTDIR:
150
      case ELOOP:
151
      case ENOENT:
152
      default:
153
	exitstatus = EX_OSFILE;
154
	break;
155
      case ENAMETOOLONG:
156
      case EMFILE:
157
      case ENFILE:
158
      case ENOMEM:
159
	exitstatus = EX_OSERR;
160
	break;
161
      }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
162
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
163
    }
164
    for(struct dirent *proc_ent = readdir(proc_dir);
165
	proc_ent != NULL;
166
	proc_ent = readdir(proc_dir)){
237.2.27 by Teddy Hogeborn
* plugin-runner.c (main): Use "sscanf" instead of "strtol"; using the
167
      pid_t pid;
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
168
      {
169
	intmax_t tmpmax;
237.2.74 by Teddy Hogeborn
Overflows are not detected by sscanf(), so stop using it:
170
	char *tmp;
171
	errno = 0;
172
	tmpmax = strtoimax(proc_ent->d_name, &tmp, 10);
173
	if(errno != 0 or tmp == proc_ent->d_name or *tmp != '\0'
174
	   or tmpmax != (pid_t)tmpmax){
237.2.31 by Teddy Hogeborn
Fixes for sscanf usage:
175
	  /* Not a process */
176
	  continue;
177
	}
178
	pid = (pid_t)tmpmax;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
179
      }
180
      /* Find the executable name by doing readlink() on the
181
	 /proc/<pid>/exe link */
182
      char exe_target[sizeof(splashy_name)];
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
183
      ssize_t sret;
184
      {
185
	char *exe_link;
186
	ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
187
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
188
	  error_plus(0, errno, "asprintf");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
189
	  exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
190
	  goto failure;
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
191
	}
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
192
	
193
	/* Check that it refers to a symlink owned by root:root */
194
	struct stat exe_stat;
195
	ret = lstat(exe_link, &exe_stat);
196
	if(ret == -1){
237.2.25 by Teddy Hogeborn
* plugins.d/splashy.c (main): Do not abort if a process vanishes while
197
	  if(errno == ENOENT){
198
	    free(exe_link);
199
	    continue;
200
	  }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
201
	  int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
202
	  error_plus(0, errno, "lstat");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
203
	  free(exe_link);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
204
	  switch(e){
205
	  case EACCES:
206
	  case ENOTDIR:
207
	  case ELOOP:
208
	  default:
209
	    exitstatus = EX_OSFILE;
210
	    break;
211
	  case ENAMETOOLONG:
212
	    exitstatus = EX_OSERR;
213
	    break;
214
	  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
215
	  goto failure;
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
216
	}
217
	if(not S_ISLNK(exe_stat.st_mode)
218
	   or exe_stat.st_uid != 0
219
	   or exe_stat.st_gid != 0){
220
	  free(exe_link);
221
	  continue;
222
	}
223
	
208 by Teddy Hogeborn
* Makefile (PLUGINS): Added "plugins.d/usplash".
224
	sret = readlink(exe_link, exe_target, sizeof(exe_target));
225
	free(exe_link);
226
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
227
      if((sret == ((ssize_t)sizeof(exe_target)-1))
228
	 and (memcmp(splashy_name, exe_target,
229
		     sizeof(exe_target)-1) == 0)){
230
	splashy_pid = pid;
231
	break;
232
      }
233
    }
234
    closedir(proc_dir);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
235
    proc_dir = NULL;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
236
  }
237
  if(splashy_pid == 0){
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
238
    exitstatus = EX_UNAVAILABLE;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
239
    goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
240
  }
241
  
242
  /* Set up the signal handler */
243
  {
244
    struct sigaction old_action,
245
      new_action = { .sa_handler = termination_handler,
246
		     .sa_flags = 0 };
247
    sigemptyset(&new_action.sa_mask);
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
248
    ret = sigaddset(&new_action.sa_mask, SIGINT);
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, SIGHUP);
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;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
258
      goto failure;
259
    }
260
    ret = sigaddset(&new_action.sa_mask, SIGTERM);
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
261
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
262
      error_plus(0, errno, "sigaddset");
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;
237.2.125 by Teddy Hogeborn
* plugin-runner.c (getplugin, add_environment, main): Handle EINTR
265
    }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
266
    ret = sigaction(SIGINT, NULL, &old_action);
267
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
268
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
269
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
270
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
271
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
272
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
273
      ret = sigaction(SIGINT, &new_action, NULL);
274
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
275
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
276
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
277
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
278
      }
279
    }
280
    ret = sigaction(SIGHUP, NULL, &old_action);
281
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
282
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
283
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
284
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
285
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
286
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
287
      ret = sigaction(SIGHUP, &new_action, NULL);
288
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
289
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
290
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
291
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
292
      }
293
    }
294
    ret = sigaction(SIGTERM, NULL, &old_action);
295
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
296
      error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
297
      exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
298
      goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
299
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
300
    if(old_action.sa_handler != SIG_IGN){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
301
      ret = sigaction(SIGTERM, &new_action, NULL);
302
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
303
	error_plus(0, errno, "sigaction");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
304
	exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
305
	goto failure;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
306
      }
307
    }
308
  }
309
  
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
310
  if(interrupted_by_signal){
311
    goto failure;
312
  }
313
  
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
314
  /* Fork off the splashy command to prompt for password */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
315
  splashy_command_pid = fork();
316
  if(splashy_command_pid != 0 and interrupted_by_signal){
317
    goto failure;
318
  }
319
  if(splashy_command_pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
320
    error_plus(0, errno, "fork");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
321
    exitstatus = EX_OSERR;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
322
    goto failure;
323
  }
324
  /* Child */
325
  if(splashy_command_pid == 0){
326
    if(not interrupted_by_signal){
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
327
      const char splashy_command[] = "/sbin/splashy_update";
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
328
      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
329
      int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
330
      error_plus(0, errno, "execl");
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
331
      switch(e){
332
      case EACCES:
333
      case ENOENT:
334
      case ENOEXEC:
335
      case EINVAL:
336
	_exit(EX_UNAVAILABLE);
337
      case ENAMETOOLONG:
338
      case E2BIG:
339
      case ENOMEM:
340
      case EFAULT:
341
      case EIO:
342
      case EMFILE:
343
      case ENFILE:
344
      case ETXTBSY:
345
      default:
346
	_exit(EX_OSERR);
347
      case ENOTDIR:
348
      case ELOOP:
349
      case EISDIR:
237.7.4 by Teddy Hogeborn
* plugins.d/splashy.c (main): Bug fix: Only use ELIBBAD if defined.
350
#ifdef ELIBBAD
351
      case ELIBBAD:		/* Linux only */
352
#endif
237.2.153 by Teddy Hogeborn
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
353
      case EPERM:
354
	_exit(EX_OSFILE);
355
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
356
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
357
    free(prompt);
358
    _exit(EXIT_FAILURE);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
359
  }
360
  
361
  /* Parent */
362
  free(prompt);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
363
  prompt = NULL;
364
  
365
  if(interrupted_by_signal){
366
    goto failure;
367
  }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
368
  
369
  /* Wait for command to complete */
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
370
  {
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
371
    int status;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
372
    do {
373
      ret = waitpid(splashy_command_pid, &status, 0);
374
    } while(ret == -1 and errno == EINTR
375
	    and not interrupted_by_signal);
376
    if(interrupted_by_signal){
377
      goto failure;
378
    }
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
379
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
380
      error_plus(0, errno, "waitpid");
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
381
      if(errno == ECHILD){
382
	splashy_command_pid = 0;
383
      }
384
    } else {
385
      /* The child process has exited */
386
      splashy_command_pid = 0;
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
387
      if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
388
	return EXIT_SUCCESS;
389
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
390
    }
391
  }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
392
  
393
 failure:
394
  
395
  free(prompt);
396
  
397
  if(proc_dir != NULL){
398
    TEMP_FAILURE_RETRY(closedir(proc_dir));
399
  }
400
  
401
  if(splashy_command_pid != 0){
402
    TEMP_FAILURE_RETRY(kill(splashy_command_pid, SIGTERM));
223 by Teddy Hogeborn
* .bzrignore (plugins.d/askpass-fifo): Added.
403
    
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
404
    TEMP_FAILURE_RETRY(kill(splashy_pid, SIGTERM));
405
    sleep(2);
406
    while(TEMP_FAILURE_RETRY(kill(splashy_pid, 0)) == 0){
407
      TEMP_FAILURE_RETRY(kill(splashy_pid, SIGKILL));
408
      sleep(1);
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
409
    }
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
410
    pid_t new_splashy_pid = (pid_t)TEMP_FAILURE_RETRY(fork());
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
411
    if(new_splashy_pid == 0){
412
      /* Child; will become new splashy process */
413
      
414
      /* Make the effective user ID (root) the only user ID instead of
415
	 the real user ID (_mandos) */
416
      ret = setuid(geteuid());
417
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
418
	error_plus(0, errno, "setuid");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
419
      }
420
      
421
      setsid();
422
      ret = chdir("/");
423
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
424
	error_plus(0, errno, "chdir");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
425
      }
426
/*       if(fork() != 0){ */
427
/* 	_exit(EXIT_SUCCESS); */
428
/*       } */
429
      ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace stdout */
430
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
431
	error_plus(0, errno, "dup2");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
432
	_exit(EX_OSERR);
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
433
      }
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
434
      
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
435
      execl("/sbin/splashy", "/sbin/splashy", "boot", (char *)NULL);
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
436
      {
437
	int e = errno;
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
438
	error_plus(0, errno, "execl");
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
439
	switch(e){
440
	case EACCES:
441
	case ENOENT:
442
	case ENOEXEC:
443
	default:
444
	  _exit(EX_UNAVAILABLE);
445
	case ENAMETOOLONG:
446
	case E2BIG:
447
	case ENOMEM:
448
	  _exit(EX_OSERR);
449
	case ENOTDIR:
450
	case ELOOP:
451
	  _exit(EX_OSFILE);
452
	}
453
      }
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
454
    }
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
455
  }
456
  
457
  if(interrupted_by_signal){
458
    struct sigaction signal_action;
459
    sigemptyset(&signal_action.sa_mask);
460
    signal_action.sa_handler = SIG_DFL;
237.2.132 by Teddy Hogeborn
* init.d-mandos (Required-Start, Required-Stop): Bug fix: Added
461
    ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
462
					    &signal_action, NULL));
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
463
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
464
      error_plus(0, errno, "sigaction");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
465
    }
466
    do {
467
      ret = raise(signal_received);
468
    } while(ret != 0 and errno == EINTR);
469
    if(ret != 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
470
      error_plus(0, errno, "raise");
237.2.126 by Teddy Hogeborn
* plugin-runner.c: Minor stylistic changes.
471
      abort();
472
    }
473
    TEMP_FAILURE_RETRY(pause());
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
474
  }
475
  
237.2.152 by Teddy Hogeborn
* plugins.d/splashy.c: Use exit codes from <sysexits.h>.
476
  return exitstatus;
205 by Teddy Hogeborn
* Makefile (PLUGINS, uninstall-client,
477
}