/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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 * 
237.7.447 by Teddy Hogeborn
Update copyright year to 2017
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 * Copyright © 2010-2017 Teddy Hogeborn
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 * Copyright © 2010-2017 Björn Påhlsson
237.2.207 by Teddy Hogeborn
Update copyright year to "2010" wherever appropriate.
7
 * 
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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 * 
10
 * 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
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/>.
237.2.207 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() */
27
#include <signal.h>		/* sig_atomic_t, struct sigaction,
28
				   sigemptyset(), sigaddset(), SIGINT,
29
				   SIGHUP, SIGTERM, sigaction(),
30
				   kill(), SIG_IGN */
31
#include <stdbool.h>		/* bool, false, true */
32
#include <fcntl.h>		/* open(), O_RDONLY */
33
#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
35
				   dirent, waitpid() */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
36
#include <sys/wait.h>		/* waitpid() */
37
#include <stddef.h>		/* NULL */
38
#include <string.h>		/* strchr(), memcmp() */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
39
#include <stdio.h>		/* asprintf(), perror(), fopen(),
237.7.33 by Teddy Hogeborn
Merge from Björn.
40
				   fscanf(), vasprintf(), fprintf(),
41
				   vfprintf() */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
42
#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() */
45
#include <stdlib.h>		/* free(), EXIT_FAILURE, realloc(),
46
				   EXIT_SUCCESS, malloc(), _exit(),
47
				   getenv() */
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
51
#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.
54
#include <argz.h>		/* argz_count(), argz_extract() */
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
55
#include <stdarg.h>		/* va_list, va_start(), ... */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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57
sig_atomic_t interrupted_by_signal = 0;
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
58
59
/* Used by Ubuntu 11.04 (Natty Narwahl) */
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
60
const char plymouth_old_old_pid[] = "/dev/.initramfs/plymouth.pid";
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
61
/* Used by Ubuntu 11.10 (Oneiric Ocelot) */
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
62
const char plymouth_old_pid[] = "/run/initramfs/plymouth.pid";
63
/* Used by Debian 9 (stretch) */
64
const char plymouth_pid[] = "/run/plymouth/pid";
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
65
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
68
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",
71
					NULL };
72
73
static void termination_handler(__attribute__((unused))int signum){
74
  if(interrupted_by_signal){
75
    return;
76
  }
77
  interrupted_by_signal = 1;
78
}
79
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
80
/* 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,
83
		...){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
84
  va_list ap;
85
  char *text;
86
  int ret;
87
  
88
  va_start(ap, formatstring);
89
  ret = vasprintf(&text, formatstring, ap);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
90
  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.
93
    vfprintf(stderr, formatstring, ap);
94
    fprintf(stderr, ": ");
95
    fprintf(stderr, "%s\n", strerror(errnum));
96
    error(status, errno, "vasprintf while printing error");
97
    return;
98
  }
99
  fprintf(stderr, "Mandos plugin ");
100
  error(status, errnum, "%s", text);
101
  free(text);
102
}
103
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
104
/* Create prompt string */
105
char *makeprompt(void){
106
  int ret = 0;
107
  char *prompt;
108
  const char *const cryptsource = getenv("cryptsource");
109
  const char *const crypttarget = getenv("crypttarget");
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
110
  const char prompt_start[] = "Unlocking the disk";
111
  const char prompt_end[] = "Enter passphrase";
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
112
  
113
  if(cryptsource == NULL){
114
    if(crypttarget == NULL){
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
115
      ret = asprintf(&prompt, "%s\n%s", prompt_start, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
116
    } else {
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
117
      ret = asprintf(&prompt, "%s (%s)\n%s", prompt_start,
118
		     crypttarget, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
119
    }
120
  } else {
121
    if(crypttarget == NULL){
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
122
      ret = asprintf(&prompt, "%s %s\n%s", prompt_start, cryptsource,
123
		     prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
124
    } else {
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
125
      ret = asprintf(&prompt, "%s %s (%s)\n%s", prompt_start,
126
		     cryptsource, crypttarget, prompt_end);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
127
    }
128
  }
129
  if(ret == -1){
130
    return NULL;
131
  }
132
  return prompt;
133
}
134
135
void kill_and_wait(pid_t pid){
136
  TEMP_FAILURE_RETRY(kill(pid, SIGTERM));
137
  TEMP_FAILURE_RETRY(waitpid(pid, NULL, 0));
138
}
139
140
bool become_a_daemon(void){
141
  int ret = setuid(geteuid());
142
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
143
    error_plus(0, errno, "setuid");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
144
  }
145
    
146
  setsid();
147
  ret = chdir("/");
148
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
149
    error_plus(0, errno, "chdir");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
150
    return false;
151
  }
152
  ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
153
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
154
    error_plus(0, errno, "dup2");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
155
    return false;
156
  }
157
  return true;
158
}
159
237.7.82 by teddy at bsnet
* plugin-runner.c (add_to_char_array): Added "nonnull" attribute.
160
__attribute__((nonnull (2, 3)))
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
161
bool exec_and_wait(pid_t *pid_return, const char *path,
237.7.168 by Teddy Hogeborn
* plugin-runner.c (main): Bug fix; do not ignore return value of
162
		   const char * const *argv, bool interruptable,
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
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		   bool daemonize){
164
  int status;
165
  int ret;
166
  pid_t pid;
167
  pid = fork();
168
  if(pid == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
169
    error_plus(0, errno, "fork");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
170
    return false;
171
  }
172
  if(pid == 0){
173
    /* Child */
174
    if(daemonize){
175
      if(not become_a_daemon()){
176
	_exit(EX_OSERR);
177
      }
178
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
179
    
237.7.381 by Teddy Hogeborn
Client: Fix plymouth agent; broken since 1.7.2.
180
    char **new_argv = malloc(sizeof(const char *));
181
    if(new_argv == NULL){
182
      error_plus(0, errno, "malloc");
183
      _exit(EX_OSERR);
184
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
185
    char **tmp;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
186
    int i = 0;
237.7.438 by Teddy Hogeborn
Add spaces around all '=' signs in all C code.
187
    for (; argv[i] != NULL; i++){
237.7.381 by Teddy Hogeborn
Client: Fix plymouth agent; broken since 1.7.2.
188
      tmp = realloc(new_argv, sizeof(const char *) * ((size_t)i + 2));
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
189
      if(tmp == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
190
	error_plus(0, errno, "realloc");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
191
	free(new_argv);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
192
	_exit(EX_OSERR);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
193
      }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
194
      new_argv = tmp;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
195
      new_argv[i] = strdup(argv[i]);
196
    }
237.7.10 by Teddy Hogeborn
* plugins.d/plymouth.c: Fixed comment to "Plymouth" instead of "Usplash".
197
    new_argv[i] = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
198
    
199
    execv(path, (char *const *)new_argv);
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
200
    error_plus(0, errno, "execv");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
201
    _exit(EXIT_FAILURE);
202
  }
203
  if(pid_return != NULL){
204
    *pid_return = pid;
205
  }
206
  do {
207
    ret = waitpid(pid, &status, 0);
208
  } while(ret == -1 and errno == EINTR
209
	  and ((not interrupted_by_signal)
210
	       or (not interruptable)));
211
  if(interrupted_by_signal and interruptable){
212
    return false;
213
  }
214
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
215
    error_plus(0, errno, "waitpid");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
216
    return false;
217
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
218
  if(WIFEXITED(status) and (WEXITSTATUS(status) == 0)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
219
    return true;
220
  }
221
  return false;
222
}
223
237.7.82 by teddy at bsnet
* plugin-runner.c (add_to_char_array): Added "nonnull" attribute.
224
__attribute__((nonnull))
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
225
int is_plymouth(const struct dirent *proc_entry){
226
  int ret;
227
  {
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
228
    uintmax_t proc_id;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
229
    char *tmp;
230
    errno = 0;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
231
    proc_id = strtoumax(proc_entry->d_name, &tmp, 10);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
232
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
233
    if(errno != 0 or *tmp != '\0'
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
234
       or proc_id != (uintmax_t)((pid_t)proc_id)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
235
      return 0;
236
    }
237
  }
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
238
  char exe_target[sizeof(plymouthd_path)];
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
239
  char *exe_link;
240
  ret = asprintf(&exe_link, "/proc/%s/exe", proc_entry->d_name);
241
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
242
    error_plus(0, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
243
    return 0;
244
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
245
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
246
  struct stat exe_stat;
247
  ret = lstat(exe_link, &exe_stat);
248
  if(ret == -1){
249
    free(exe_link);
250
    if(errno != ENOENT){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
251
      error_plus(0, errno, "lstat");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
252
    }
253
    return 0;
254
  }
255
  
256
  if(not S_ISLNK(exe_stat.st_mode)
257
     or exe_stat.st_uid != 0
258
     or exe_stat.st_gid != 0){
259
    free(exe_link);
260
    return 0;
261
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
262
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
263
  ssize_t sret = readlink(exe_link, exe_target, sizeof(exe_target));
264
  free(exe_link);
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
265
  if((sret != (ssize_t)sizeof(plymouthd_path)-1) or
266
      (memcmp(plymouthd_path, exe_target,
267
	      sizeof(plymouthd_path)-1) != 0)){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
268
    return 0;
269
  }
270
  return 1;
271
}
272
273
pid_t get_pid(void){
274
  int ret;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
275
  uintmax_t proc_id = 0;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
276
  FILE *pidfile = fopen(plymouth_pid, "r");
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
277
  /* Try the new pid file location */
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
278
  if(pidfile != NULL){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
279
    ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
280
    if(ret != 1){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
281
      proc_id = 0;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
282
    }
283
    fclose(pidfile);
284
  }
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
285
  /* Try the old pid file location */
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
286
  if(proc_id == 0){
237.7.462 by Teddy Hogeborn
Plymouth plugin bug fix: Actually try the old PID file location
287
    pidfile = fopen(plymouth_old_pid, "r");
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
288
    if(pidfile != NULL){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
289
      ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
290
      if(ret != 1){
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
291
	proc_id = 0;
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
292
      }
293
      fclose(pidfile);
294
    }
295
  }
237.7.463 by Teddy Hogeborn
Plymouth plugin: Try the newest PID file location
296
  /* Try the old old pid file location */
297
  if(proc_id == 0){
298
    pidfile = fopen(plymouth_old_old_pid, "r");
299
    if(pidfile != NULL){
300
      ret = fscanf(pidfile, "%" SCNuMAX, &proc_id);
301
      if(ret != 1){
302
	proc_id = 0;
303
      }
304
      fclose(pidfile);
305
    }
306
  }
237.7.52 by Teddy Hogeborn
* plugins.d/plymouth.c (plymouth_pid): Changed to
307
  /* Look for a plymouth process */
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
308
  if(proc_id == 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
309
    struct dirent **direntries = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
310
    ret = scandir("/proc", &direntries, is_plymouth, alphasort);
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
311
    if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
312
      error_plus(0, errno, "scandir");
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
313
    }
237.7.218 by Teddy Hogeborn
White space fix: change "if (" to "if(" in C code.
314
    if(ret > 0){
237.7.461 by Teddy Hogeborn
Fix another memory leak in plymouth plugin
315
      for(int i = ret-1; i >= 0; i--){
316
	if(proc_id == 0){
317
	  ret = sscanf(direntries[i]->d_name, "%" SCNuMAX, &proc_id);
318
	  if(ret < 0){
319
	    error_plus(0, errno, "sscanf");
320
	  }
321
	}
322
	free(direntries[i]);
275.1.1 by Björn Påhlsson
password-prompt: added conflic handling with plymouth daemon.
323
      }
324
    }
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
325
    /* scandir might preallocate for this variable (man page unclear).
237.7.33 by Teddy Hogeborn
Merge from Björn.
326
       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.
327
    free(direntries);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
328
  }
329
  pid_t pid;
237.7.84 by Björn Påhlsson
renamed some foomax values to what they actually represent
330
  pid = (pid_t)proc_id;
331
  if((uintmax_t)pid == proc_id){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
332
    return pid;
333
  }
334
  
335
  return 0;
336
}
337
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
338
char **getargv(pid_t pid){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
339
  int cl_fd;
340
  char *cmdline_filename;
341
  ssize_t sret;
342
  int ret;
343
  
344
  ret = asprintf(&cmdline_filename, "/proc/%" PRIuMAX "/cmdline",
345
		 (uintmax_t)pid);
346
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
347
    error_plus(0, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
348
    return NULL;
349
  }
350
  
351
  /* Open /proc/<pid>/cmdline  */
352
  cl_fd = open(cmdline_filename, O_RDONLY);
353
  free(cmdline_filename);
354
  if(cl_fd == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
355
    error_plus(0, errno, "open");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
356
    return NULL;
357
  }
358
  
359
  size_t cmdline_allocated = 0;
360
  size_t cmdline_len = 0;
361
  char *cmdline = NULL;
362
  char *tmp;
363
  const size_t blocksize = 1024;
364
  do {
365
    /* Allocate more space? */
366
    if(cmdline_len + blocksize > cmdline_allocated){
367
      tmp = realloc(cmdline, cmdline_allocated + blocksize);
368
      if(tmp == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
369
	error_plus(0, errno, "realloc");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
370
	free(cmdline);
371
	close(cl_fd);
372
	return NULL;
373
      }
374
      cmdline = tmp;
375
      cmdline_allocated += blocksize;
376
    }
377
    
378
    /* Read data */
379
    sret = read(cl_fd, cmdline + cmdline_len,
380
		cmdline_allocated - cmdline_len);
381
    if(sret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
382
      error_plus(0, errno, "read");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
383
      free(cmdline);
384
      close(cl_fd);
385
      return NULL;
386
    }
387
    cmdline_len += (size_t)sret;
388
  } while(sret != 0);
389
  ret = close(cl_fd);
390
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
391
    error_plus(0, errno, "close");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
392
    free(cmdline);
393
    return NULL;
394
  }
395
  
396
  /* 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
397
  char **argv = malloc((argz_count(cmdline, cmdline_len) + 1)
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
398
		       * sizeof(char *)); /* Get number of args */
399
  if(argv == NULL){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
400
    error_plus(0, errno, "argv = malloc()");
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
401
    free(cmdline);
402
    return NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
403
  }
237.2.194 by teddy at bsnet
* debian/watch: Also watch for "*.tar.xz" files.
404
  argz_extract(cmdline, cmdline_len, argv); /* Create argv */
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
405
  return argv;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
406
}
407
408
int main(__attribute__((unused))int argc,
409
	 __attribute__((unused))char **argv){
410
  char *prompt;
411
  char *prompt_arg;
412
  pid_t plymouth_command_pid;
413
  int ret;
414
  bool bret;
415
416
  /* test -x /bin/plymouth */
417
  ret = access(plymouth_path, X_OK);
418
  if(ret == -1){
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
419
    /* Plymouth is probably not installed.  Don't print an error
420
       message, just exit. */
421
    exit(EX_UNAVAILABLE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
422
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
423
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
424
  { /* Add signal handlers */
425
    struct sigaction old_action,
426
      new_action = { .sa_handler = termination_handler,
427
		     .sa_flags = 0 };
428
    sigemptyset(&new_action.sa_mask);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
429
    for(int *sig = (int[]){ SIGINT, SIGHUP, SIGTERM, 0 };
430
	*sig != 0; sig++){
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
431
      ret = sigaddset(&new_action.sa_mask, *sig);
432
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
433
	error_plus(EX_OSERR, errno, "sigaddset");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
434
      }
435
      ret = sigaction(*sig, NULL, &old_action);
436
      if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
437
	error_plus(EX_OSERR, errno, "sigaction");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
438
      }
439
      if(old_action.sa_handler != SIG_IGN){
440
	ret = sigaction(*sig, &new_action, NULL);
441
	if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
442
	  error_plus(EX_OSERR, errno, "sigaction");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
443
	}
444
      }
445
    }
446
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
447
  
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
448
  /* plymouth --ping */
449
  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
450
		       (const char *[])
451
		       { plymouth_path, "--ping", NULL },
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
452
		       true, false);
453
  if(not bret){
454
    if(interrupted_by_signal){
455
      kill_and_wait(plymouth_command_pid);
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
456
      exit(EXIT_FAILURE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
457
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
458
    /* Plymouth is probably not running.  Don't print an error
459
       message, just exit. */
460
    exit(EX_UNAVAILABLE);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
461
  }
462
  
463
  prompt = makeprompt();
464
  ret = asprintf(&prompt_arg, "--prompt=%s", prompt);
465
  free(prompt);
466
  if(ret == -1){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
467
    error_plus(EX_OSERR, errno, "asprintf");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
468
  }
469
  
470
  /* plymouth ask-for-password --prompt="$prompt" */
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
471
  bret = exec_and_wait(&plymouth_command_pid,
472
		       plymouth_path, (const char *[])
473
		       { plymouth_path, "ask-for-password",
474
			   prompt_arg, NULL },
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
475
		       true, false);
476
  free(prompt_arg);
477
  if(bret){
478
    exit(EXIT_SUCCESS);
479
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
480
  if(not interrupted_by_signal){
481
    /* exec_and_wait failed for some other reason */
482
    exit(EXIT_FAILURE);
483
  }
484
  kill_and_wait(plymouth_command_pid);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
485
  
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
486
  char **plymouthd_argv = NULL;
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
487
  pid_t pid = get_pid();
488
  if(pid == 0){
24.1.174 by Björn Påhlsson
* Makefile (CFLAGS): Added "-lrt" to include real time library.
489
    error_plus(0, 0, "plymouthd pid not found");
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
490
  } else {
491
    plymouthd_argv = getargv(pid);
492
  }
493
  
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
494
  bret = exec_and_wait(NULL, plymouth_path, (const char *[])
495
		       { plymouth_path, "quit", NULL },
496
		       false, false);
497
  if(not bret){
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
498
    if(plymouthd_argv != NULL){
499
      free(*plymouthd_argv);
500
      free(plymouthd_argv);
501
    }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
502
    exit(EXIT_FAILURE);
503
  }
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
504
  bret = exec_and_wait(NULL, plymouthd_path,
505
		       (plymouthd_argv != NULL)
506
		       ? (const char * const *)plymouthd_argv
507
		       : plymouthd_default_argv,
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
508
		       false, true);
237.7.460 by Teddy Hogeborn
Fix memory leak in plymouth plugin
509
  if(plymouthd_argv != NULL){
510
    free(*plymouthd_argv);
511
    free(plymouthd_argv);
512
  }
237.2.199 by teddy at bsnet
* plugins.d/plymouth.c: Break lines, fix whitespace. Remove
513
  if(not bret){
514
    exit(EXIT_FAILURE);
515
  }
516
  exec_and_wait(NULL, plymouth_path, (const char *[])
517
		{ plymouth_path, "show-splash", NULL },
518
		false, false);
24.1.157 by Björn Påhlsson
added the actually plugin file for plymouth
519
  exit(EXIT_FAILURE);
520
}