blog/Upstart_or_sysvinit___as_init_d_scripts_see_it.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   2           "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml" dir="ltr">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
   6     <title>Petter Reinholdtsen: Upstart or sysvinit - as init.d scripts see it</title>
   7     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/style.css" />
   8     <link rel="stylesheet" type="text/css" media="screen" href="http://people.skolelinux.org/pere/blog/vim.css" />
   9
  10
  11   </head>
  12   <body>
  13     <div class="title">
  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <div class="entry">
  23       <div class="title">Upstart or sysvinit - as init.d scripts see it</div>
  24       <div class="date"> 6th June 2010</div>
  25       <div class="body"><p>If Debian is to migrate to upstart on Linux, I expect some init.d
  26 scripts to migrate (some of) their operations to upstart job while
  27 keeping the init.d for hurd and kfreebsd.  The packages with such
  28 needs will need a way to get their init.d scripts to behave
  29 differently when used with sysvinit and with upstart.  Because of
  30 this, I had a look at the environment variables set when a init.d
  31 script is running under upstart, and when it is not.</p>
  32
  33 <p>With upstart, I notice these environment variables are set when a
  34 script is started from rcS.d/ (ignoring some irrelevant ones like
  35 COLUMNS):</p>
  36
  37 <blockquote><pre>
  38 DEFAULT_RUNLEVEL=2
  39 previous=N
  40 PREVLEVEL=
  41 RUNLEVEL=
  42 runlevel=S
  43 UPSTART_EVENTS=startup
  44 UPSTART_INSTANCE=
  45 UPSTART_JOB=rc-sysinit
  46 </pre></blockquote>
  47
  48 <p>With sysvinit, these environment variables are set for the same
  49 script.</p>
  50
  51 <blockquote><pre>
  52 INIT_VERSION=sysvinit-2.88
  53 previous=N
  54 PREVLEVEL=N
  55 RUNLEVEL=S
  56 runlevel=S
  57 </pre></blockquote>
  58
  59 <p>The RUNLEVEL and PREVLEVEL environment variables passed on from
  60 sysvinit are not set by upstart.  Not sure if it is intentional or not
  61 to not be compatible with sysvinit in this regard.</p>
  62
  63 <p>For scripts needing to behave differently when upstart is used,
  64 looking for the UPSTART_JOB environment variable seem to be a good
  65 choice.</p>
  66 </div>
  67
  68       <div class="tags">Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.</div>
  69
  70
  71     </div>
  72
  73
  74
  75
  76     <div id="sidebar">
  77
  78
  79
  80 <h2>Archive</h2>
  81 <ul>
  82
  83 <li>2013
  84 <ul>
  85
  86 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
  87
  88 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (9)</a></li>
  89
  90 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/03/">March (9)</a></li>
  91
  92 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/04/">April (6)</a></li>
  93
  94 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/05/">May (9)</a></li>
  95
  96 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/06/">June (10)</a></li>
  97
  98 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/07/">July (7)</a></li>
  99
 100 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/08/">August (3)</a></li>
 101
 102 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/09/">September (5)</a></li>
 103
 104 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/10/">October (2)</a></li>
 105
 106 </ul></li>
 107
 108 <li>2012
 109 <ul>
 110
 111 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 112
 113 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 114
 115 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 116
 117 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 118
 119 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 120
 121 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 122
 123 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 124
 125 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 126
 127 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 128
 129 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 130
 131 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 132
 133 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 134
 135 </ul></li>
 136
 137 <li>2011
 138 <ul>
 139
 140 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 141
 142 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 143
 144 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 145
 146 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 147
 148 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 149
 150 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 151
 152 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 153
 154 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 155
 156 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 157
 158 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 159
 160 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 161
 162 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 163
 164 </ul></li>
 165
 166 <li>2010
 167 <ul>
 168
 169 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 170
 171 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 172
 173 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 174
 175 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 176
 177 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 178
 179 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 180
 181 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 182
 183 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 184
 185 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 186
 187 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 188
 189 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 190
 191 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 192
 193 </ul></li>
 194
 195 <li>2009
 196 <ul>
 197
 198 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 199
 200 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 201
 202 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 203
 204 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 205
 206 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 207
 208 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 209
 210 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 211
 212 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 213
 214 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 215
 216 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 217
 218 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 219
 220 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 221
 222 </ul></li>
 223
 224 <li>2008
 225 <ul>
 226
 227 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 228
 229 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 230
 231 </ul></li>
 232
 233 </ul>
 234
 235
 236
 237 <h2>Tags</h2>
 238 <ul>
 239
 240  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 241
 242  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 243
 244  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 245
 246  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 247
 248  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (7)</a></li>
 249
 250  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 251
 252  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 253
 254  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (86)</a></li>
 255
 256  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (142)</a></li>
 257
 258  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (10)</a></li>
 259
 260  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (10)</a></li>
 261
 262  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 263
 264  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (219)</a></li>
 265
 266  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
 267
 268  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 269
 270  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (12)</a></li>
 271
 272  <li><a href="http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox (3)</a></li>
 273
 274  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (11)</a></li>
 275
 276  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (37)</a></li>
 277
 278  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (7)</a></li>
 279
 280  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (18)</a></li>
 281
 282  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 283
 284  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (6)</a></li>
 285
 286  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 287
 288  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
 289
 290  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (235)</a></li>
 291
 292  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (154)</a></li>
 293
 294  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (8)</a></li>
 295
 296  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 297
 298  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (44)</a></li>
 299
 300  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (66)</a></li>
 301
 302  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 303
 304  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 305
 306  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 307
 308  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (7)</a></li>
 309
 310  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 311
 312  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 313
 314  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 315
 316  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (31)</a></li>
 317
 318  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 319
 320  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 321
 322  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (43)</a></li>
 323
 324  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 325
 326  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (8)</a></li>
 327
 328  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (18)</a></li>
 329
 330  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
 331
 332  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (8)</a></li>
 333
 334  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (39)</a></li>
 335
 336  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 337
 338  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (28)</a></li>
 339
 340 </ul>
 341
 342
 343     </div>
 344     <p style="text-align: right">
 345  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 346 </p>
 347
 348   </body>
 349 </html>