/mandos/release

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/release
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
1
/*  -*- coding: utf-8 -*- */
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/*
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
3
 * Plymouth - Read a password from Plymouth and output it
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
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 * 
237.7.766 by teddy at recompile
Update copyright year
5
 * Copyright © 2010-2020 Teddy Hogeborn
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 * Copyright © 2010-2020 Björn Påhlsson
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
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 * 
237.7.455 by Teddy Hogeborn
Alter copyright notices slightly. Actual license is unchanged!
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 * This file is part of Mandos.
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 * 
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 * Mandos is free software: you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, either version 3 of the License, or
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 * (at your option) any later version.
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 * 
15
 * Mandos is distributed in the hope that it will be useful, but
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
16
 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18
 * General Public License for more details.
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 * 
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/>.
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
22
 * 
237.11.2 by Teddy Hogeborn
Change "fukt.bsnet.se" to "recompile.se" throughout.
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 * Contact the authors at <mandos@recompile.se>.
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
24
 */
25
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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#define _GNU_SOURCE		/* asprintf(), TEMP_FAILURE_RETRY() */
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#include <signal.h>		/* sig_atomic_t, struct sigaction,
28
				   sigemptyset(), sigaddset(), SIGINT,
29
				   SIGHUP, SIGTERM, sigaction(),
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				   kill(), SIG_IGN */
31
#include <stdbool.h>		/* bool, false, true */
32
#include <fcntl.h>		/* open(), O_RDONLY */
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#include <iso646.h>		/* and, or, not*/
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
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#include <sys/types.h>		/* size_t, ssize_t, pid_t, struct
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				   dirent, waitpid() */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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#include <sys/wait.h>		/* waitpid() */
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#include <stddef.h>		/* NULL */
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#include <string.h>		/* strchr(), memcmp() */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
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#include <stdio.h>		/* asprintf(), perror(), fopen(),
237.7.33 by Teddy Hogeborn
Merge from Björn.
40
				   fscanf(), vasprintf(), fprintf(),
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				   vfprintf() */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
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#include <unistd.h>		/* close(), readlink(), read(),
43
				   fork(), setsid(), chdir(), dup2(),
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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				   STDERR_FILENO, execv(), access() */
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#include <stdlib.h>		/* free(), EXIT_FAILURE, realloc(),
46
				   EXIT_SUCCESS, malloc(), _exit(),
237.7.753 by teddy at recompile
Use reallocarray() if available, or check for overflow
47
				   getenv(), reallocarray() */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
48
#include <dirent.h>		/* scandir(), alphasort() */
49
#include <inttypes.h>		/* intmax_t, strtoumax(), SCNuMAX */
50
#include <sys/stat.h>		/* struct stat, lstat() */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
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#include <sysexits.h>		/* EX_OSERR, EX_UNAVAILABLE */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
52
#include <error.h>		/* error() */
53
#include <errno.h>		/* TEMP_FAILURE_RETRY */
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
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#include <argz.h>		/* argz_count(), argz_extract() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
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#include <stdarg.h>		/* va_list, va_start(), ... */
237.7.675 by Teddy Hogeborn
Add dracut(8) support
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#include <argp.h>
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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58
sig_atomic_t interrupted_by_signal = 0;
237.7.675 by Teddy Hogeborn
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const char *argp_program_version = "plymouth " VERSION;
60
const char *argp_program_bug_address = "<mandos@recompile.se>";
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
61
62
/* Used by Ubuntu 11.04 (Natty Narwahl) */
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
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const char plymouth_old_old_pid[] = "/dev/.initramfs/plymouth.pid";
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
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/* Used by Ubuntu 11.10 (Oneiric Ocelot) */
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
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const char plymouth_old_pid[] = "/run/initramfs/plymouth.pid";
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/* Used by Debian 9 (stretch) */
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const char plymouth_pid[] = "/run/plymouth/pid";
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
68
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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const char plymouth_path[] = "/bin/plymouth";
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const char plymouthd_path[] = "/sbin/plymouthd";
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
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const char *plymouthd_default_argv[] = {"/sbin/plymouthd",
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					"--mode=boot",
24.1.157 by Björn Påhlsson
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					"--attach-to-session",
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					NULL };
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bool debug = false;
24.1.157 by Björn Påhlsson
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static void termination_handler(__attribute__((unused))int signum){
78
  if(interrupted_by_signal){
79
    return;
80
  }
81
  interrupted_by_signal = 1;
82
}
83
237.7.675 by Teddy Hogeborn
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__attribute__((format (gnu_printf, 2, 3), nonnull))
85
int fprintf_plus(FILE *stream, const char *format, ...){
86
  va_list ap;
87
  va_start (ap, format);
88
  fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name);
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  return vfprintf(stream, format, ap);
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}
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24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
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/* Function to use when printing errors */
237.7.81 by teddy at bsnet
* plugins.d/splashy.c (error_plus): Check format string.
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__attribute__((format (gnu_printf, 3, 4)))
237.7.33 by Teddy Hogeborn
Merge from Björn.
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void error_plus(int status, int errnum, const char *formatstring,
95
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
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  va_list ap;
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  char *text;
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  int ret;
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100
  va_start(ap, formatstring);
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  ret = vasprintf(&text, formatstring, ap);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
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  if(ret == -1){
237.7.33 by Teddy Hogeborn
Merge from Björn.
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    fprintf(stderr, "Mandos plugin %s: ",
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	    program_invocation_short_name);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
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    vfprintf(stderr, formatstring, ap);
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    fprintf(stderr, ": ");
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    fprintf(stderr, "%s\n", strerror(errnum));
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    error(status, errno, "vasprintf while printing error");
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    return;
110
  }
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  fprintf(stderr, "Mandos plugin ");
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  error(status, errnum, "%s", text);
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  free(text);
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}
115
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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/* Create prompt string */
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char *makeprompt(void){
118
  int ret = 0;
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  char *prompt;
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  const char *const cryptsource = getenv("cryptsource");
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  const char *const crypttarget = getenv("crypttarget");
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
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  const char prompt_start[] = "Unlocking the disk";
123
  const char prompt_end[] = "Enter passphrase";
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
124
  
125
  if(cryptsource == NULL){
126
    if(crypttarget == NULL){
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
127
      ret = asprintf(&prompt, "%s\n%s", prompt_start, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
128
    } else {
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
129
      ret = asprintf(&prompt, "%s (%s)\n%s", prompt_start,
130
		     crypttarget, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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    }
132
  } else {
133
    if(crypttarget == NULL){
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
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      ret = asprintf(&prompt, "%s %s\n%s", prompt_start, cryptsource,
135
		     prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
136
    } else {
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
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      ret = asprintf(&prompt, "%s %s (%s)\n%s", prompt_start,
138
		     cryptsource, crypttarget, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
139
    }
140
  }
141
  if(ret == -1){
142
    return NULL;
143
  }
144
  return prompt;
145
}
146
147
void kill_and_wait(pid_t pid){
148
  TEMP_FAILURE_RETRY(kill(pid, SIGTERM));
149
  TEMP_FAILURE_RETRY(waitpid(pid, NULL, 0));
150
}
151
152
bool become_a_daemon(void){
153
  int ret = setuid(geteuid());
154
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
155
    error_plus(0, errno, "setuid");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
156
  }
157
    
158
  setsid();
159
  ret = chdir("/");
160
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
161
    error_plus(0, errno, "chdir");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
162
    return false;
163
  }
164
  ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
165
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
166
    error_plus(0, errno, "dup2");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
167
    return false;
168
  }
169
  return true;
170
}
171
237.7.82 by teddy at bsnet
* plugin-runner.c (add_to_char_array): Added "nonnull" attribute.
172
__attribute__((nonnull (2, 3)))
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
173
bool exec_and_wait(pid_t *pid_return, const char *path,
237.7.675 by Teddy Hogeborn
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174
		   const char * const * const argv, bool interruptable,
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
175
		   bool daemonize){
176
  int status;
177
  int ret;
178
  pid_t pid;
237.7.675 by Teddy Hogeborn
Add dracut(8) support
179
  if(debug){
180
    for(const char * const *arg = argv; *arg != NULL; arg++){
181
      fprintf_plus(stderr, "exec_and_wait arg: %s\n", *arg);
182
    }
183
    fprintf_plus(stderr, "exec_and_wait end of args\n");
184
  }
185
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
186
  pid = fork();
187
  if(pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
188
    error_plus(0, errno, "fork");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
189
    return false;
190
  }
191
  if(pid == 0){
192
    /* Child */
193
    if(daemonize){
194
      if(not become_a_daemon()){
195
	_exit(EX_OSERR);
196
      }
197
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
198
    
237.7.381 by Teddy Hogeborn
Client: Fix plymouth agent; broken since 1.7.2.
199
    char **new_argv = malloc(sizeof(const char *));
200
    if(new_argv == NULL){
201
      error_plus(0, errno, "malloc");
202
      _exit(EX_OSERR);
203
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
204
    char **tmp;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
205
    int i = 0;
237.7.438 by Teddy Hogeborn
Add spaces around all '=' signs in all C code.
206
    for (; argv[i] != NULL; i++){
237.7.753 by teddy at recompile
Use reallocarray() if available, or check for overflow
207
#if defined(__GLIBC_PREREQ) and __GLIBC_PREREQ(2, 26)
208
      tmp = reallocarray(new_argv, ((size_t)i + 2),
209
			 sizeof(const char *));
210
#else
211
      if(((size_t)i + 2) > (SIZE_MAX / sizeof(const char *))){
212
	/* overflow */
213
	tmp = NULL;
214
	errno = ENOMEM;
215
      } else {
216
	tmp = realloc(new_argv, ((size_t)i + 2) * sizeof(const char *));
217
      }
218
#endif
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
219
      if(tmp == NULL){
237.7.753 by teddy at recompile
Use reallocarray() if available, or check for overflow
220
	error_plus(0, errno, "reallocarray");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
221
	free(new_argv);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
222
	_exit(EX_OSERR);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
223
      }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
224
      new_argv = tmp;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
225
      new_argv[i] = strdup(argv[i]);
226
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
227
    new_argv[i] = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
228
    
229
    execv(path, (char *const *)new_argv);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
230
    error_plus(0, errno, "execv");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
231
    _exit(EXIT_FAILURE);
232
  }
233
  if(pid_return != NULL){
234
    *pid_return = pid;
235
  }
236
  do {
237
    ret = waitpid(pid, &status, 0);
238
  } while(ret == -1 and errno == EINTR
239
	  and ((not interrupted_by_signal)
240
	       or (not interruptable)));
241
  if(interrupted_by_signal and interruptable){
237.7.675 by Teddy Hogeborn
Add dracut(8) support
242
    if(debug){
243
      fprintf_plus(stderr, "Interrupted by signal\n");
244
    }
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
245
    return false;
246
  }
247
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
248
    error_plus(0, errno, "waitpid");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
249
    return false;
250
  }
237.7.675 by Teddy Hogeborn
Add dracut(8) support
251
  if(debug){
252
    if(WIFEXITED(status)){
253
      fprintf_plus(stderr, "exec_and_wait exited: %d\n",
254
		   WEXITSTATUS(status));
255
    } else if(WIFSIGNALED(status)) {
256
      fprintf_plus(stderr, "exec_and_wait signaled: %d\n",
257
		   WTERMSIG(status));
258
    }
259
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
260
  if(WIFEXITED(status) and (WEXITSTATUS(status) == 0)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
261
    return true;
262
  }
263
  return false;
264
}
265
237.7.82 by teddy at bsnet
* plugin-runner.c (add_to_char_array): Added "nonnull" attribute.
266
__attribute__((nonnull))
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
267
int is_plymouth(const struct dirent *proc_entry){
268
  int ret;
269
  {
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
270
    uintmax_t proc_id;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
271
    char *tmp;
272
    errno = 0;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
273
    proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
274
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
275
    if(errno != 0 or *tmp != '\0'
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
276
       or proc_id != (uintmax_t)((pid_t)proc_id)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
277
      return 0;
278
    }
279
  }
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
280
  char exe_target[sizeof(plymouthd_path)];
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
281
  char *exe_link;
282
  ret = asprintf(&exe_link, "/proc/%s/exe", proc_entry->d_name);
283
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
284
    error_plus(0, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
285
    return 0;
286
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
287
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
288
  struct stat exe_stat;
289
  ret = lstat(exe_link, &exe_stat);
290
  if(ret == -1){
291
    free(exe_link);
292
    if(errno != ENOENT){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
293
      error_plus(0, errno, "lstat");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
294
    }
295
    return 0;
296
  }
297
  
298
  if(not S_ISLNK(exe_stat.st_mode)
299
     or exe_stat.st_uid != 0
300
     or exe_stat.st_gid != 0){
301
    free(exe_link);
302
    return 0;
303
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
304
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
305
  ssize_t sret = readlink(exe_link, exe_target, sizeof(exe_target));
306
  free(exe_link);
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
307
  if((sret != (ssize_t)sizeof(plymouthd_path)-1) or
308
      (memcmp(plymouthd_path, exe_target,
309
	      sizeof(plymouthd_path)-1) != 0)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
310
    return 0;
311
  }
312
  return 1;
313
}
314
315
pid_t get_pid(void){
316
  int ret;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
317
  uintmax_t proc_id = 0;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
318
  FILE *pidfile = fopen(plymouth_pid, "r");
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
319
  /* Try the new pid file location */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
320
  if(pidfile != NULL){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
321
    ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
322
    if(ret != 1){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
323
      proc_id = 0;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
324
    }
325
    fclose(pidfile);
326
  }
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
327
  /* Try the old pid file location */
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
328
  if(proc_id == 0){
237.7.462 by Teddy Hogeborn
Plymouth plugin bug fix: Actually try the old PID file location
329
    pidfile = fopen(plymouth_old_pid, "r");
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
330
    if(pidfile != NULL){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
331
      ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
332
      if(ret != 1){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
333
	proc_id = 0;
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
334
      }
335
      fclose(pidfile);
336
    }
337
  }
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
338
  /* Try the old old pid file location */
339
  if(proc_id == 0){
340
    pidfile = fopen(plymouth_old_old_pid, "r");
341
    if(pidfile != NULL){
342
      ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
343
      if(ret != 1){
344
	proc_id = 0;
345
      }
346
      fclose(pidfile);
347
    }
348
  }
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
349
  /* Look for a plymouth process */
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
350
  if(proc_id == 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
351
    struct dirent **direntries = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
352
    ret = scandir("/proc", &direntries, is_plymouth, alphasort);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
353
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
354
      error_plus(0, errno, "scandir");
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
355
    }
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
356
    if(ret > 0){
237.7.461 by Teddy Hogeborn
Fix another memory leak in plymouth plugin
357
      for(int i = ret-1; i >= 0; i--){
358
	if(proc_id == 0){
359
	  ret = sscanf(direntries[i]->d_name, "%" SCNuMAX, &proc_id);
360
	  if(ret < 0){
361
	    error_plus(0, errno, "sscanf");
362
	  }
363
	}
364
	free(direntries[i]);
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
365
      }
366
    }
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
367
    /* scandir might preallocate for this variable (man page unclear).
237.7.33 by Teddy Hogeborn
Merge from Björn.
368
       even if ret == 0, therefore we need to free it. */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
369
    free(direntries);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
370
  }
371
  pid_t pid;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
372
  pid = (pid_t)proc_id;
373
  if((uintmax_t)pid == proc_id){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
374
    return pid;
375
  }
376
  
377
  return 0;
378
}
379
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
380
char **getargv(pid_t pid){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
381
  int cl_fd;
382
  char *cmdline_filename;
383
  ssize_t sret;
384
  int ret;
385
  
386
  ret = asprintf(&cmdline_filename, "/proc/%" PRIuMAX "/cmdline",
387
		 (uintmax_t)pid);
388
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
389
    error_plus(0, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
390
    return NULL;
391
  }
392
  
393
  /* Open /proc/<pid>/cmdline  */
394
  cl_fd = open(cmdline_filename, O_RDONLY);
395
  free(cmdline_filename);
396
  if(cl_fd == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
397
    error_plus(0, errno, "open");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
398
    return NULL;
399
  }
400
  
401
  size_t cmdline_allocated = 0;
402
  size_t cmdline_len = 0;
403
  char *cmdline = NULL;
404
  char *tmp;
405
  const size_t blocksize = 1024;
406
  do {
407
    /* Allocate more space? */
408
    if(cmdline_len + blocksize > cmdline_allocated){
409
      tmp = realloc(cmdline, cmdline_allocated + blocksize);
410
      if(tmp == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
411
	error_plus(0, errno, "realloc");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
412
	free(cmdline);
413
	close(cl_fd);
414
	return NULL;
415
      }
416
      cmdline = tmp;
417
      cmdline_allocated += blocksize;
418
    }
419
    
420
    /* Read data */
421
    sret = read(cl_fd, cmdline + cmdline_len,
422
		cmdline_allocated - cmdline_len);
423
    if(sret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
424
      error_plus(0, errno, "read");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
425
      free(cmdline);
426
      close(cl_fd);
427
      return NULL;
428
    }
429
    cmdline_len += (size_t)sret;
430
  } while(sret != 0);
431
  ret = close(cl_fd);
432
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
433
    error_plus(0, errno, "close");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
434
    free(cmdline);
435
    return NULL;
436
  }
437
  
438
  /* we got cmdline and cmdline_len, ignore rest... */
237.2.195 by teddy at bsnet
* plugins.d/usplash.c (main): BUG FIX: allocate space for the final
439
  char **argv = malloc((argz_count(cmdline, cmdline_len) + 1)
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
440
		       * sizeof(char *)); /* Get number of args */
441
  if(argv == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
442
    error_plus(0, errno, "argv = malloc()");
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
443
    free(cmdline);
444
    return NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
445
  }
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
446
  argz_extract(cmdline, cmdline_len, argv); /* Create argv */
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
447
  return argv;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
448
}
449
450
int main(__attribute__((unused))int argc,
451
	 __attribute__((unused))char **argv){
237.7.675 by Teddy Hogeborn
Add dracut(8) support
452
  char *prompt = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
453
  char *prompt_arg;
454
  pid_t plymouth_command_pid;
455
  int ret;
456
  bool bret;
457
237.7.675 by Teddy Hogeborn
Add dracut(8) support
458
  {
459
    struct argp_option options[] = {
460
      { .name = "prompt", .key = 128, .arg = "PROMPT",
461
	.doc = "The prompt to show" },
462
      { .name = "debug", .key = 129,
463
	.doc = "Debug mode" },
464
      { .name = NULL }
465
    };
466
    
467
    __attribute__((nonnull(3)))
468
    error_t parse_opt (int key, char *arg, __attribute__((unused))
469
		       struct argp_state *state){
470
      errno = 0;
471
      switch (key){
472
      case 128:			/* --prompt */
473
	prompt = arg;
474
	if(debug){
475
	  fprintf_plus(stderr, "Custom prompt \"%s\"\n", prompt);
476
	}
477
	break;
478
      case 129:			/* --debug */
479
	debug = true;
480
	break;
481
      default:
482
	return ARGP_ERR_UNKNOWN;
483
      }
484
      return errno;
485
    }
486
    
487
    struct argp argp = { .options = options, .parser = parse_opt,
488
			 .args_doc = "",
489
			 .doc = "Mandos plymouth -- Read and"
490
			 " output a password" };
491
    ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, NULL, NULL);
492
    switch(ret){
493
    case 0:
494
      break;
495
    case ENOMEM:
496
    default:
497
      errno = ret;
498
      error_plus(0, errno, "argp_parse");
499
      return EX_OSERR;
500
    case EINVAL:
501
      error_plus(0, errno, "argp_parse");
502
      return EX_USAGE;
503
    }
504
  }
505
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
506
  /* test -x /bin/plymouth */
507
  ret = access(plymouth_path, X_OK);
508
  if(ret == -1){
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
509
    /* Plymouth is probably not installed.  Don't print an error
510
       message, just exit. */
237.7.675 by Teddy Hogeborn
Add dracut(8) support
511
    if(debug){
512
      fprintf_plus(stderr, "Plymouth (%s) not found\n",
513
		   plymouth_path);
514
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
515
    exit(EX_UNAVAILABLE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
516
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
517
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
518
  { /* Add signal handlers */
519
    struct sigaction old_action,
520
      new_action = { .sa_handler = termination_handler,
521
		     .sa_flags = 0 };
522
    sigemptyset(&new_action.sa_mask);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
523
    for(int *sig = (int[]){ SIGINT, SIGHUP, SIGTERM, 0 };
524
	*sig != 0; sig++){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
525
      ret = sigaddset(&new_action.sa_mask, *sig);
526
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
527
	error_plus(EX_OSERR, errno, "sigaddset");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
528
      }
529
      ret = sigaction(*sig, NULL, &old_action);
530
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
531
	error_plus(EX_OSERR, errno, "sigaction");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
532
      }
533
      if(old_action.sa_handler != SIG_IGN){
534
	ret = sigaction(*sig, &new_action, NULL);
535
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
536
	  error_plus(EX_OSERR, errno, "sigaction");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
537
	}
538
      }
539
    }
540
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
541
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
542
  /* plymouth --ping */
543
  bret = exec_and_wait(&plymouth_command_pid, plymouth_path,
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
544
		       (const char *[])
545
		       { plymouth_path, "--ping", NULL },
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
546
		       true, false);
547
  if(not bret){
548
    if(interrupted_by_signal){
549
      kill_and_wait(plymouth_command_pid);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
550
      exit(EXIT_FAILURE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
551
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
552
    /* Plymouth is probably not running.  Don't print an error
553
       message, just exit. */
237.7.675 by Teddy Hogeborn
Add dracut(8) support
554
    if(debug){
555
      fprintf_plus(stderr, "Plymouth not running\n");
556
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
557
    exit(EX_UNAVAILABLE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
558
  }
559
  
237.7.675 by Teddy Hogeborn
Add dracut(8) support
560
  if(prompt != NULL){
561
    ret = asprintf(&prompt_arg, "--prompt=%s", prompt);
562
  } else {
563
    char *made_prompt = makeprompt();
564
    ret = asprintf(&prompt_arg, "--prompt=%s", made_prompt);
565
    free(made_prompt);
566
  }
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
567
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
568
    error_plus(EX_OSERR, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
569
  }
570
  
571
  /* plymouth ask-for-password --prompt="$prompt" */
237.7.675 by Teddy Hogeborn
Add dracut(8) support
572
  if(debug){
573
    fprintf_plus(stderr, "Prompting for password via Plymouth\n");
574
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
575
  bret = exec_and_wait(&plymouth_command_pid,
576
		       plymouth_path, (const char *[])
577
		       { plymouth_path, "ask-for-password",
578
			   prompt_arg, NULL },
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
579
		       true, false);
580
  free(prompt_arg);
581
  if(bret){
582
    exit(EXIT_SUCCESS);
583
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
584
  if(not interrupted_by_signal){
585
    /* exec_and_wait failed for some other reason */
586
    exit(EXIT_FAILURE);
587
  }
588
  kill_and_wait(plymouth_command_pid);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
589
  
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
590
  char **plymouthd_argv = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
591
  pid_t pid = get_pid();
592
  if(pid == 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
593
    error_plus(0, 0, "plymouthd pid not found");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
594
  } else {
595
    plymouthd_argv = getargv(pid);
596
  }
597
  
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
598
  bret = exec_and_wait(NULL, plymouth_path, (const char *[])
599
		       { plymouth_path, "quit", NULL },
600
		       false, false);
601
  if(not bret){
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
602
    if(plymouthd_argv != NULL){
603
      free(*plymouthd_argv);
604
      free(plymouthd_argv);
605
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
606
    exit(EXIT_FAILURE);
607
  }
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
608
  bret = exec_and_wait(NULL, plymouthd_path,
609
		       (plymouthd_argv != NULL)
610
		       ? (const char * const *)plymouthd_argv
611
		       : plymouthd_default_argv,
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
612
		       false, true);
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
613
  if(plymouthd_argv != NULL){
614
    free(*plymouthd_argv);
615
    free(plymouthd_argv);
616
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
617
  if(not bret){
618
    exit(EXIT_FAILURE);
619
  }
620
  exec_and_wait(NULL, plymouth_path, (const char *[])
621
		{ plymouth_path, "show-splash", NULL },
622
		false, false);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
623
  exit(EXIT_FAILURE);
624
}