src/startup-debian.c

   1 /* $Id$
   2  * UDP Gateway utility startup scripts support using debian(8)
   3  * Copyright (C) 2004 Jan Kratochvil <project-udpgate@jankratochvil.net>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include <glib/gmessages.h>
  23 #include <stdlib.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #include <unistd.h>
  27 #include <glib/gmem.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <sys/stat.h>
  31 #include <stdio.h>
  32 #include <ctype.h>
  33
  34 #include "startup-debian.h"     /* self */
  35
  36 #ifdef ENABLE_BUNDLE
  37 #include "bundle-util.h"
  38 #endif
  39
  40
  41 /* Config: */
  42 /* Do not: /etc/rc.d/init.d/...
  43  * to comply with http://www.linuxbase.org/spec/booksets/LSB-Core/LSB-Core.html#INITSRCINSTRM
  44  */
  45 #define INIT_D_PATHNAME G_STRINGIFY(SYSCONFDIR) "/init.d/" PACKAGE
  46
  47
  48 #define STATUS_0_1(status) ( \
  49                 !(WIFEXITED((status)) && (WEXITSTATUS((status))==0 || WEXITSTATUS((status))==1) \
  50                                                 && !WIFSIGNALED((status)) \
  51                                                 && !WIFSTOPPED((status))) \
  52                                 ? -1 : WEXITSTATUS((status)))
  53
  54
  55 static gboolean udpgate_startup_debian_init(UdpgateStartup *udpgate_startup)
  56 {
  57 int status;
  58 /* ">/dev/null" for: Adding system startup for /etc/init.d/PACKAGE ...
  59  * "2>/dev/null" for: bash: update-rc.d: command not found
  60  */
  61 const gchar *command="update-rc.d -n " PACKAGE " defaults &>/dev/null";
  62
  63         g_return_val_if_fail(UDPGATE_IS_STARTUP_DEBIAN(udpgate_startup),FALSE);
  64
  65         status=system(command);
  66         if (STATUS_0_1(status)<0) {
  67                 g_warning(_("Error checking validity of update-rc.d(8) setup; automatic startup disabled; failed command: %s"),command);
  68                 return FALSE;
  69                 }
  70         return TRUE;
  71 }
  72
  73 static gboolean udpgate_startup_debian_query(UdpgateStartup *udpgate_startup,gboolean *is_on)
  74 {
  75 const gchar *command="update-rc.d -n " PACKAGE " defaults 2>/dev/null";
  76 static char buffer[0x1000];
  77 char *s;
  78 size_t fread_got;
  79 FILE *f;
  80
  81         g_return_val_if_fail(UDPGATE_IS_STARTUP_DEBIAN(udpgate_startup),FALSE);
  82
  83         if (!(f=popen(command,"r"))) {
  84 #if 0
  85                 g_warning(_("Error checking registrance of this program automatic startup opening \"%s\": %m"),command);
  86 #endif
  87                 return FALSE;
  88                 }
  89         fread_got=fread(buffer,1,sizeof(buffer),f);
  90         if (fclose(f)) {
  91 #if 0
  92                 g_warning(_("Error checking registrance of this program automatic startup closing \"%s\": %m"),command);
  93 #endif
  94                 return FALSE;
  95         }
  96         if (fread_got<=0 || fread_got>=sizeof(buffer)) {
  97 #if 0
  98                 g_warning(_("Error checking registrance of this program automatic startup reading \"%s\": %m"),command);
  99 #endif
 100                 return FALSE;
 101         }
 102         buffer[fread_got]='\0';
 103         for (s=buffer;*s && isspace(*s);s++);
 104         /* Fortunately update-rc.d(8) is just a dumb script without messages localization. */
 105
 106 #define TEXT_ADDING_SYSTEM_STARTUP_FOR "Adding system startup for"
 107 /*
 108  Adding system startup for /etc/init.d/PACKAGE ...
 109    /etc/rc0.d/K20PACKAGE -> ../init.d/PACKAGE
 110 ...
 111    /etc/rc5.d/S20PACKAGE -> ../init.d/PACKAGE
 112 */
 113         if (!strncasecmp(s,TEXT_ADDING_SYSTEM_STARTUP_FOR,strlen(TEXT_ADDING_SYSTEM_STARTUP_FOR))) {
 114                 if (is_on)
 115                         *is_on=FALSE;
 116                 return TRUE;
 117                 }
 118
 119 #define TEXT_SYSTEM_STARTUP_LINKS_FOR "System startup links for"
 120 /*
 121  System startup links for /etc/init.d/PACKAGE already exist.
 122 */
 123         if (!strncasecmp(s,TEXT_SYSTEM_STARTUP_LINKS_FOR,strlen(TEXT_SYSTEM_STARTUP_LINKS_FOR))) {
 124                 if (is_on)
 125                         *is_on=TRUE;
 126                 return TRUE;
 127                 }
 128
 129         /* Failed: */
 130         if ((s=strchr(buffer,'\n')))
 131                 *s='\0';
 132         g_warning(_("Error checking registrance of this program, unknown output of \"%s\": %s"),command,buffer);
 133         return FALSE;
 134 }
 135
 136 static gboolean udpgate_startup_debian_on(UdpgateStartup *udpgate_startup)
 137 {
 138 /* Do not: " >/dev/null"
 139  * as it is useful for: Adding system startup for /etc/init.d/PACKAGE ...
 140  * but it is bad for:
 141  *       Adding system startup for /etc/init.d/PACKAGE ...
 142  *         /etc/rc0.d/K20PACKAGE -> ../init.d/PACKAGE
 143  *      update-rc.d: symlink: Permission denied
 144  * as the second line also gets hidden.
 145  */
 146 const gchar *command="update-rc.d " PACKAGE " defaults";
 147 int status;
 148
 149         g_return_val_if_fail(UDPGATE_IS_STARTUP_DEBIAN(udpgate_startup),FALSE);
 150
 151 #ifdef ENABLE_BUNDLE
 152         if (!bundle_util_file_write(
 153                         INIT_D_PATHNAME,        /* pathname */
 154                         PACKAGE ".init",        /* basename */
 155                         0755,   /* pathname_mode */
 156                         TRUE))  /* pathname_backup */
 157                 return FALSE;
 158 #endif /* ENABLE_BUNDLE */
 159
 160         status=system(command);
 161
 162         if (0!=STATUS_0_1(status)) {
 163                 g_warning(_("Error registering automatic program startup by: %s"),command);
 164                 return FALSE;
 165                 }
 166         return TRUE;
 167 }
 168
 169 static gboolean udpgate_startup_debian_off(UdpgateStartup *udpgate_startup)
 170 {
 171 /* Do not: " >/dev/null"
 172  * as it is useful for: Removing any system startup links for /etc/init.d/PACKAGE ...
 173  * but it is bad for:
 174  *       Removing any system startup links for /etc/init.d/PACKAGE ...
 175  *         /etc/rc0.d/S30PACKAGE
 176  *       update-rc.d: unlink: Permission denied
 177  * as the second line also gets hidden.
 178  */
 179 /* "-f" can be prevented for: ENABLE_BUNDLE
 180  * by removing 'INIT_D_PATHNAME' first but it would still not work for
 181  * regular non-bundled packaging.
 182  */
 183 const gchar *command="update-rc.d -f " PACKAGE " remove";
 184 int status;
 185
 186         g_return_val_if_fail(UDPGATE_IS_STARTUP_DEBIAN(udpgate_startup),FALSE);
 187
 188 #ifdef ENABLE_BUNDLE
 189         /* init.d file must no longer exist for: update-rc.d PACKAGE remove
 190          * without using its: -f|--force
 191          */
 192         if (!bundle_util_file_remove(INIT_D_PATHNAME,PACKAGE ".init"))
 193                 return FALSE;
 194 #endif /* ENABLE_BUNDLE */
 195
 196         status=system(command);
 197         if (0!=STATUS_0_1(status)) {
 198                 g_warning(_("Error removing program's system startup registrance by: %s"),command);
 199                 return FALSE;
 200                 }
 201
 202         return TRUE;
 203 }
 204
 205 static void udpgate_startup_debian_class_init (UdpgateStartupDebianClass *class)
 206 {
 207         UdpgateStartupClass *udpgate_startup_class = UDPGATE_STARTUP_CLASS(class);
 208
 209         udpgate_startup_class->init = udpgate_startup_debian_init;
 210         udpgate_startup_class->query = udpgate_startup_debian_query;
 211         udpgate_startup_class->on = udpgate_startup_debian_on;
 212         udpgate_startup_class->off = udpgate_startup_debian_off;
 213 }
 214
 215 GType udpgate_startup_debian_get_type(void)
 216 {
 217   static GType udpgate_startup_debian_type=0;
 218
 219   if (!udpgate_startup_debian_type) {
 220                 static const GTypeInfo udpgate_startup_debian_info={
 221                         sizeof(UdpgateStartupDebianClass),
 222                         NULL,           /* base_init */
 223                         NULL,           /* base_finalize */
 224                         (GClassInitFunc)udpgate_startup_debian_class_init,
 225                         NULL,           /* class_finalize */
 226                         NULL,           /* class_data */
 227                         sizeof(UdpgateStartupDebian),
 228                         0,              /* n_preallocs */
 229                         NULL,           /* instance_init */
 230                         NULL,           /* value_table */
 231       };
 232
 233                 udpgate_startup_debian_type=g_type_register_static(UDPGATE_TYPE_STARTUP,"UdpgateStartupDebian",
 234                                  &udpgate_startup_debian_info,0);
 235     }
 236
 237   return udpgate_startup_debian_type;
 238 }