dh_installinit

   1 #!/usr/bin/perl -w
   2
   3 =head1 NAME
   4
   5 dh_installinit - install upstart jobs or init scripts into package build directories
   6
   7 =cut
   8
   9 use strict;
  10 use Debian::Debhelper::Dh_Lib;
  11
  12 =head1 SYNOPSIS
  13
  14 B<dh_installinit> [S<I<debhelper options>>] [B<--name=>I<name>] [B<-n>] [B<-R>] [B<-r>] [B<-d>] [B<-O>] [S<B<--> I<params>>]
  15
  16 =head1 DESCRIPTION
  17
  18 B<dh_installinit> is a debhelper program that is responsible for installing
  19 upstart job files or init scripts with associated defaults files into package
  20 build directories, and in the former case providing compatibility handling
  21 for non-upstart systems.
  22
  23 It also automatically generates the F<postinst> and F<postrm> and F<prerm> commands
  24 needed to set up the symlinks in F</etc/rc*.d/> and to start and stop the init
  25 scripts.
  26
  27 =head1 FILES
  28
  29 =over 4
  30
  31 =item debian/I<package>.upstart
  32
  33 If this exists, it is installed into etc/init/I<package>.conf in the package
  34 build directory.
  35
  36 =item debian/I<package>.init
  37
  38 Otherwise, if this exists, it is installed
  39 into etc/init.d/I<package> in the package build directory.
  40
  41 =item debian/I<package>.default
  42
  43 If this exists, it is installed into etc/default/I<package> in the package
  44 build directory.
  45
  46 =back
  47
  48 =head1 OPTIONS
  49
  50 =over 4
  51
  52 =item B<-n>, B<--noscripts>
  53
  54 Do not modify F<postinst>/F<postrm>/F<prerm> scripts.
  55
  56 =item B<-o>, B<--onlyscripts>
  57
  58 Only modify F<postinst>/F<postrm>/F<prerm> scripts, do not actually install any init
  59 script, default files, or upstart job. May be useful if the init script or
  60 upstart job is shipped and/or installed by upstream in a way that doesn't
  61 make it easy to let B<dh_installinit> find it.
  62
  63 If no upstart job file is installed in the target directory when
  64 B<dh_installinit --onlyscripts> is called, this program will assume that an
  65 init script is being installed and not provide the compatibility symlinks
  66 or upstart dependencies.
  67
  68 =item B<-R>, B<--restart-after-upgrade>
  69
  70 Do not stop the init script until after the package upgrade has been
  71 completed. This is different than the default behavior, which stops the
  72 script in the F<prerm>, and starts it again in the F<postinst>.
  73
  74 This can be useful for daemons that should not have a possibly long
  75 downtime during upgrade. But you should make sure that the daemon will not
  76 get confused by the package being upgraded while it's running before using
  77 this option.
  78
  79 =item B<-r>, B<--no-restart-on-upgrade>
  80
  81 Do not stop init script on upgrade.
  82
  83 =item B<--no-start>
  84
  85 Do not start the init script on install or upgrade, or stop it on removal.
  86 Only call B<update-rc.d>. Useful for rcS scripts.
  87
  88 =item B<-d>, B<--remove-d>
  89
  90 Remove trailing B<d> from the name of the package, and use the result for the
  91 filename the upstart job file is installed as in F<etc/init/> , or for the
  92 filename the init script is installed as in etc/init.d and the default file
  93 is installed as in F<etc/default/> . This may be useful for daemons with names
  94 ending in B<d>. (Note: this takes precedence over the B<--init-script> parameter
  95 described below.)
  96
  97 =item B<-u>I<params> B<--update-rcd-params=>I<params>
  98
  99 =item B<--> I<params>
 100
 101 Pass I<params> to L<update-rc.d(8)>. If not specified, B<defaults> will be
 102 passed to L<update-rc.d(8)>.
 103
 104 =item B<--name=>I<name>
 105
 106 Install the upstart job file or the init script (and default file) using the
 107 filename I<name> instead of the default filename, which is the package name.
 108 When this parameter is used, B<dh_installinit> looks for and installs files
 109 named F<debian/package.name.upstart>, F<debian/package.name.init> and
 110 F<debian/package.name.default>, instead of the usual F<debian/package.upstart>,
 111 F<debian/package.init> and F<debian/package.default>.
 112
 113 =item B<--init-script=>I<scriptname>
 114
 115 Use I<scriptname> as the filename the init script is installed as in
 116 F<etc/init.d/> (and also use it as the filename for the defaults file, if it
 117 is installed). If you use this parameter, B<dh_installinit> will look to see
 118 if a file in the F<debian/> directory exists that looks like
 119 F<package.scriptname> and if so will install it as the init script in
 120 preference to the files it normally installs.
 121
 122 This parameter is deprecated, use the B<--name> parameter instead. This
 123 parameter will be ignored completely for upstart jobs.
 124
 125 =item B<--error-handler=>I<function>
 126
 127 Call the named shell I<function> if running the init script fails. The
 128 function should be provided in the F<prerm> and F<postinst> scripts, before the
 129 B<#DEBHELPER#> token.
 130
 131 =back
 132
 133 =head1 NOTES
 134
 135 Note that this command is not idempotent. L<dh_prep(1)> should be called
 136 between invocations of this command. Otherwise, it may cause multiple
 137 instances of the same text to be added to maintainer scripts.
 138
 139 =cut
 140
 141 init(options => {
 142         "r" => \$dh{R_FLAG},
 143         "no-restart-on-upgrade" => \$dh{R_FLAG},
 144         "no-start" => \$dh{NO_START},
 145         "R|restart-after-upgrade" => \$dh{RESTART_AFTER_UPGRADE},
 146         "init-script=s" => \$dh{INIT_SCRIPT},
 147         "update-rcd-params=s", => \$dh{U_PARAMS},
 148         "remove-d" => \$dh{D_FLAG},
 149 });
 150
 151 foreach my $package (@{$dh{DOPACKAGES}}) {
 152         my $tmp=tmpdir($package);
 153
 154         # Figure out what filename to install it as.
 155         my $script;
 156         my $jobfile=$package;
 157         if (defined $dh{NAME}) {
 158                 $jobfile=$script=$dh{NAME};
 159         }
 160         elsif ($dh{D_FLAG}) {
 161                 # -d on the command line sets D_FLAG. We will
 162                 # remove a trailing 'd' from the package name and
 163                 # use that as the name.
 164                 $script=$package;
 165                 if ($script=~m/(.*)d$/) {
 166                         $jobfile=$script=$1;
 167                 }
 168                 else {
 169                         warning("\"$package\" has no final d' in its name, but -d was specified.");
 170                 }
 171         }
 172         elsif ($dh{INIT_SCRIPT}) {
 173                 $script=$dh{INIT_SCRIPT};
 174         }
 175         else {
 176                 $script=$package;
 177         }
 178
 179         my $job=pkgfile($package,"upstart");
 180         my $init='';
 181
 182         if ($job ne '' || ($dh{ONLYSCRIPTS} && -e "$tmp/etc/init/$jobfile.conf")) {
 183                 if (! $dh{ONLYSCRIPTS}) {
 184                         if (! -d "$tmp/etc/init") {
 185                                 doit("install","-d","$tmp/etc/init");
 186                         }
 187
 188                         doit("install","-p","-m644",$job,"$tmp/etc/init/$jobfile.conf");
 189                 }
 190
 191                 # ensures that our /etc/init.d/ symlink points to a valid
 192                 # implementation
 193                 addsubstvar($package, "misc:Depends", "upstart-job");
 194
 195                 if (! -d "$tmp/etc/init.d") {
 196                         doit("install","-d","$tmp/etc/init.d");
 197                 }
 198                 doit("ln","-sf","/lib/init/upstart-job","$tmp/etc/init.d/$jobfile");
 199         }
 200         else {
 201                 $init=pkgfile($package,$script) || pkgfile($package,"init") ||
 202                         pkgfile($package,"init.d");
 203         }
 204
 205         my $default=pkgfile($package,'default');
 206         if ($default ne '' && ! $dh{ONLYSCRIPTS}) {
 207                 if (! -d "$tmp/etc/default") {
 208                         doit("install","-d","$tmp/etc/default");
 209                 }
 210                 doit("install","-p","-m644",$default,"$tmp/etc/default/$script");
 211         }
 212
 213         if ($init ne '' && ! $dh{ONLYSCRIPTS}) {
 214                 if (! -d "$tmp/etc/init.d") {
 215                         doit("install","-d","$tmp/etc/init.d");
 216                 }
 217
 218                 doit("install","-p","-m755",$init,"$tmp/etc/init.d/$script");
 219         }
 220
 221         if ($job ne '' || $init ne '' || $dh{ONLYSCRIPTS}) {
 222                 if (-e "$tmp/etc/init/$jobfile.conf") {
 223                         $script=$jobfile;
 224                 }
 225
 226                 # This is set by the -u "foo" command line switch, it's
 227                 # the parameters to pass to update-rc.d. If not set,
 228                 # we have to say "defaults".
 229                 my $params='';
 230                 if (defined($dh{U_PARAMS})) {
 231                         $params=join(' ',@{$dh{U_PARAMS}});
 232                 }
 233                 if ($params eq '') {
 234                         $params="defaults";
 235                 }
 236
 237                 if (! $dh{NOSCRIPTS}) {
 238                         if (! $dh{NO_START}) {
 239                                 if ($dh{RESTART_AFTER_UPGRADE}) {
 240                                         # update-rc.d, and restart (or
 241                                         # start if new install) script
 242                                         autoscript($package,"postinst", "postinst-init-restart",
 243                                                 "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 244                                 }
 245                                 else {
 246                                         # update-rc.d, and start script
 247                                         autoscript($package,"postinst", "postinst-init",
 248                                                 "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 249                                 }
 250
 251                                 if ($dh{R_FLAG} || $dh{RESTART_AFTER_UPGRADE}) {
 252                                         # stops script only on remove
 253                                         autoscript($package,"prerm","prerm-init-norestart",
 254                                                 "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 255                                 }
 256                                 else {
 257                                         # always stops script
 258                                         autoscript($package,"prerm","prerm-init",
 259                                                 "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 260                                 }
 261                         }
 262                         else {
 263                                 # just update-rc.d
 264                                 autoscript($package,"postinst", "postinst-init-nostart",
 265                                         "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 266                         }
 267
 268                         # removes rc.d links
 269                         autoscript($package,"postrm","postrm-init",
 270                                 "s/#SCRIPT#/$script/;s/#INITPARMS#/$params/;s/#ERROR_HANDLER#/$dh{ERROR_HANDLER}/");
 271                 }
 272         }
 273 }
 274
 275 =head1 SEE ALSO
 276
 277 L<debhelper(7)>
 278
 279 This program is a part of debhelper.
 280
 281 =head1 AUTHORS
 282
 283 Joey Hess <joeyh@debian.org>
 284
 285 Steve Langasek <steve.langasek@canonical.com>
 286
 287 =cut