This file is indexed.

/usr/share/doc/live-manual/html/coding-style.ro.html is in live-manual-html 1:3.0~a9-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <title>
    coding-style -
    Debian Live Manual
  </title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
  <meta name="dc.title" content="Debian Live Manual" />
  <meta name="dc.author" content="Debian Live Project &#60;debian-live@lists.debian.org&#62;" />
  <meta name="dc.publisher" content="Debian Live Project &#60;debian-live@lists.debian.org&#62;" />
  <meta name="dc.date" content="2011-12-04"  />
  <meta name="dc.rights" content="Copyright (C) 2006-2011 Debian Live Project;&#60;br&#62; License: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.&#60;br&#62;&#60;br&#62;This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.&#60;br&#62;&#60;br&#62;You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/. &#60;br&#62;&#60;br&#62;The complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-3 file." />

  <meta name="generator" content="SiSU 3.1.9 of 2011w51/1 (2011-12-19) (n*x and Ruby!)" />
    <link rel="generator" href="http://www.sisudoc.org/" />
  <link rel="shortcut icon" href="../_sisu/image/rb7.ico" />

  <link rel="stylesheet" href="../_sisu/css/html.css" type="text/css" />
</head>
<body bgcolor="#ffffff" text="#000000" link="#003090" lang="en" xml:lang="en">
<a name="top" id="top"></a>
<a name="up" id="up"></a>
<a name="start" id="start"></a><table summary="segment navigation band with banner" bgcolor="#ffffff" width="100%"><tr>
<td width="20%" align="left">
<table summary="band" border="0" cellpadding="3" cellspacing="0"><tr><td align="left" bgcolor="#ffffff"><a href="http://live.debian.net/" target="_top"><img border="0" src="../_sisu/image/debian_home.png" alt="Debian --&gt;" /></a></td></tr>
</table>
</td>
<td width="75%" align="center">
  
<table summary="segment navigation available documents types: toc,doc,pdf,concordance" border="0" cellpadding="3" cellspacing="0">
<tr>
<td align="center" bgcolor="#ffffff">
  <td align="center" bgcolor="#ffffff">
  <a href="sisu_manifest.ro.html" target="_top" >
      <font face="verdana, arial, georgia, tahoma, sans-serif, helvetica, times, roman" size="2">
    [&nbsp;document&nbsp;manifest&nbsp;]
  </font> 
  </a>
</td>
  
</tr></table>
</td>
<td width="5%" align="right">
  <table summary="segment navigation pre/next" border="0" cellpadding="3" cellspacing="0">
<tr>
<td align="center" bgcolor="#ffffff">
  <a href="bugs.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_prev_red.png" alt="&lt;&lt;&nbsp;previous" />
  </a>
</td>
<td align="center" bgcolor="#ffffff">
  <a href="toc.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_up_red.png" alt="TOC" />
  </a>
</td>
<td align="center" bgcolor="#ffffff">
  <a href="procedures.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_next_red.png" alt="next&nbsp;&gt;&gt;" />
  </a>
</td>
<td>
</td></tr>
</table>
</td></tr>
</table>
<table summary="segment hidden control pre and next" width="100%" border="0" cellpadding="0" bgcolor=#eeeeee align="center">
<tr><td align="left">
  <a href="bugs.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&lt;" />
  </a>
</td>
<td align="center">
  <a href="toc.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&#094;" />
  </a>
</td>
<td align="right">
  <a href="procedures.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&gt;" />
  </a>
</td></tr>
</table><div class="content">
<h1 class="tiny">
    Debian Live Manual
  </h1>
</div><div class="content">
<h2 class="tiny">
    Project
  </h2>
</div><div class="content"><div class="substance">
  <label class="ocn"><a name="624" href="#624" class="lnkocn">624</a></label>
  <h1 class="norm" id="o624"><a name="624"></a>
    14. Coding Style
  </h1>
</div><div class="substance">
  <label class="ocn"><a name="625" href="#625" class="lnkocn">625</a></label>
  <p class="i0" id="o625">
    This chapter documents the coding style used in <i>live-boot</i> and others.
  </p>
</div><div class="substance">
  <label class="ocn"><a name="626" href="#626" class="lnkocn">626</a></label>
  <p class="bold" id="o626"><a name="626"></a> <a name="h14.1" id="h14.1"></a>
    <a name="14.1" ></a><a name="h14.1" ></a>14.1 Compatibility
  </p>
</div><div class="substance">
  <label class="ocn"><a name="627" href="#627" class="lnkocn">627</a></label>
  <li class="bullet" id="o627">
    Don't use syntax or semantics that are unique to the Bash shell. For  example, the use of array constructs.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="628" href="#628" class="lnkocn">628</a></label>
  <li class="bullet" id="o628">
    Only use the POSIX subset - for example, use $(foo) over `foo`.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="629" href="#629" class="lnkocn">629</a></label>
  <li class="bullet" id="o629">
    You can check your scripts with 'sh -n' and 'checkbashisms'.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="630" href="#630" class="lnkocn">630</a></label>
  <p class="bold" id="o630"><a name="630"></a> <a name="h14.2" id="h14.2"></a>
    <a name="14.2" ></a><a name="h14.2" ></a>14.2 Indenting
  </p>
</div><div class="substance">
  <label class="ocn"><a name="631" href="#631" class="lnkocn">631</a></label>
  <li class="bullet" id="o631">
    Always use tabs over spaces.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="632" href="#632" class="lnkocn">632</a></label>
  <p class="bold" id="o632"><a name="632"></a> <a name="h14.3" id="h14.3"></a>
    <a name="14.3" ></a><a name="h14.3" ></a>14.3 Wrapping
  </p>
</div><div class="substance">
  <label class="ocn"><a name="633" href="#633" class="lnkocn">633</a></label>
  <li class="bullet" id="o633">
    Generally, lines are 80 chars at maximum.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="634" href="#634" class="lnkocn">634</a></label>
  <li class="bullet" id="o634">
    Use the "Linux style" of line breaks:
  </li>
</div><div class="substance">
  <label class="ocn"><a name="635" href="#635" class="lnkocn">635</a></label>
  <p class="i0" id="o635">
    Bad:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="636" href="#636" class="lnkocn">636</a></label>
  <p class="code" id="o636">
    if foo; then<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bar<br />
fi<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="637" href="#637" class="lnkocn">637</a></label>
  <p class="i0" id="o637">
    Good:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="638" href="#638" class="lnkocn">638</a></label>
  <p class="code" id="o638">
    if foo<br />
then<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bar<br />
fi<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="639" href="#639" class="lnkocn">639</a></label>
  <li class="bullet" id="o639">
    The same holds for functions:
  </li>
</div><div class="substance">
  <label class="ocn"><a name="640" href="#640" class="lnkocn">640</a></label>
  <p class="i0" id="o640">
    Bad:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="641" href="#641" class="lnkocn">641</a></label>
  <p class="code" id="o641">
    foo () {<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bar<br />
}<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="642" href="#642" class="lnkocn">642</a></label>
  <p class="i0" id="o642">
    Good:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="643" href="#643" class="lnkocn">643</a></label>
  <p class="code" id="o643">
    foo ()<br />
{<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bar<br />
}<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="644" href="#644" class="lnkocn">644</a></label>
  <p class="bold" id="o644"><a name="644"></a> <a name="h14.4" id="h14.4"></a>
    <a name="14.4" ></a><a name="h14.4" ></a>14.4 Variables
  </p>
</div><div class="substance">
  <label class="ocn"><a name="645" href="#645" class="lnkocn">645</a></label>
  <li class="bullet" id="o645">
    Variables are always in capital letters.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="646" href="#646" class="lnkocn">646</a></label>
  <li class="bullet" id="o646">
    Variables that used in <tt>lb config</tt> always start with <tt>LB_</tt> prefix.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="647" href="#647" class="lnkocn">647</a></label>
  <li class="bullet" id="o647">
    Internal temporary variables in <i>live-build</i> should start with the  <tt>&#095;LB_</tt> prefix.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="648" href="#648" class="lnkocn">648</a></label>
  <li class="bullet" id="o648">
    Local variables start with <i>live-build</i> <tt>&#095;&#095;LB_</tt> prefix.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="649" href="#649" class="lnkocn">649</a></label>
  <li class="bullet" id="o649">
    Variables in connection to a boot parameter in <i>live-config</i> start with  <tt>LIVE_</tt>.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="650" href="#650" class="lnkocn">650</a></label>
  <li class="bullet" id="o650">
    All other variables in <i>live-config</i> start with <tt>_</tt> prefix.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="651" href="#651" class="lnkocn">651</a></label>
  <li class="bullet" id="o651">
    Use braces around variables; e.g. write <tt>${FOO}</tt> instead of <tt>$FOO</tt>.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="652" href="#652" class="lnkocn">652</a></label>
  <li class="bullet" id="o652">
    Always protect variables with quotes to respect potential whitespaces:  write <tt>"${FOO}"</tt> not <tt>${FOO}</tt>.
  </li>
</div><div class="substance">
  <label class="ocn"><a name="653" href="#653" class="lnkocn">653</a></label>
  <li class="bullet" id="o653">
    For consistency reasons, always use quotes when assigning values to  variables:
  </li>
</div><div class="substance">
  <label class="ocn"><a name="654" href="#654" class="lnkocn">654</a></label>
  <p class="i0" id="o654">
    Bad:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="655" href="#655" class="lnkocn">655</a></label>
  <p class="code" id="o655">
    FOO=bar<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="656" href="#656" class="lnkocn">656</a></label>
  <p class="i0" id="o656">
    Good:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="657" href="#657" class="lnkocn">657</a></label>
  <p class="code" id="o657">
    FOO="bar"<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="658" href="#658" class="lnkocn">658</a></label>
  <li class="bullet" id="o658">
    If multiple variables are used, quote the full expression:
  </li>
</div><div class="substance">
  <label class="ocn"><a name="659" href="#659" class="lnkocn">659</a></label>
  <p class="i0" id="o659">
    Bad:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="660" href="#660" class="lnkocn">660</a></label>
  <p class="code" id="o660">
    if [ -f "${FOO}"/foo/"${BAR}"/bar ]<br />
then<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;foobar<br />
fi<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="661" href="#661" class="lnkocn">661</a></label>
  <p class="i0" id="o661">
    Good:
  </p>
</div><div class="substance">
  <label class="ocn"><a name="662" href="#662" class="lnkocn">662</a></label>
  <p class="code" id="o662">
    if [ -f "${FOO}/foo/${BAR}/bar" ]<br />
then<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;foobar<br />
fi<br /><br />
  </p>
</div><div class="substance">
  <label class="ocn"><a name="663" href="#663" class="lnkocn">663</a></label>
  <p class="bold" id="o663"><a name="663"></a> <a name="h14.5" id="h14.5"></a>
    <a name="14.5" ></a><a name="h14.5" ></a>14.5 Miscellaneous
  </p>
</div><div class="substance">
  <label class="ocn"><a name="664" href="#664" class="lnkocn">664</a></label>
  <li class="bullet" id="o664">
    Use "<tt>|</tt>" (without the surround quotes) as a seperator in calls to sed,  e.g. "<tt>sed -e 's|foo|bar|'</tt>" (without "").
  </li>
</div><div class="substance">
  <label class="ocn"><a name="665" href="#665" class="lnkocn">665</a></label>
  <li class="bullet" id="o665">
    Don't use the <tt>test</tt> command for comparisons or tests, use "<tt>[</tt>"  "<tt>]</tt>" (without ""); e.g. "<tt>if [ -x /bin/foo ]; ...</tt>" and not "<tt>if test  -x /bin/foo; ...</tt>".
  </li>
</div><div class="substance">
  <label class="ocn"><a name="666" href="#666" class="lnkocn">666</a></label>
  <li class="bullet" id="o666">
    Use <tt>case</tt> wherever possible over <tt>test</tt>, as it's easier to read and  faster in execution.
  </li>
</div></div><br /><div class="main_column">
  <table summary="segment navigation band" bgcolor="#ffffff" width="100%"><tr>
  <td width="70%" align="center">
    
<table summary="segment navigation available documents types: toc,doc,pdf,concordance" border="0" cellpadding="3" cellspacing="0">
<tr>
<td align="center" bgcolor="#ffffff">
  <td align="center" bgcolor="#ffffff">
  <a href="sisu_manifest.ro.html" target="_top" >
      <font face="verdana, arial, georgia, tahoma, sans-serif, helvetica, times, roman" size="2">
    [&nbsp;document&nbsp;manifest&nbsp;]
  </font> 
  </a>
</td>
  
</tr></table>
  </td>
  <td width="5%" align="right">
    <table summary="segment navigation pre/next" border="0" cellpadding="3" cellspacing="0">
<tr>
<td align="center" bgcolor="#ffffff">
  <a href="bugs.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_prev_red.png" alt="&lt;&lt;&nbsp;previous" />
  </a>
</td>
<td align="center" bgcolor="#ffffff">
  <a href="toc.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_up_red.png" alt="TOC" />
  </a>
</td>
<td align="center" bgcolor="#ffffff">
  <a href="procedures.ro.html" target="_top" >
    <img border="0" width="22" height="22" src="../_sisu/image_sys/arrow_next_red.png" alt="next&nbsp;&gt;&gt;" />
  </a>
</td>
<td>
</td></tr>
</table>
  </td></tr>
  </table>
  <table summary="segment hidden control pre and next" width="100%" border="0" cellpadding="0" bgcolor=#eeeeee align="center">
<tr><td align="left">
  <a href="bugs.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&lt;" />
  </a>
</td>
<td align="center">
  <a href="toc.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&#094;" />
  </a>
</td>
<td align="right">
  <a href="procedures.ro.html" target="_top" >
    <img border="0" width="100%" height="20" src="../_sisu/image_sys/dot_white.png" alt="&gt;" />
  </a>
</td></tr>
</table>
</div><div class="main_column">


<a name="bottom" id="bottom"></a>
<a name="down" id="down"></a>
<a name="end" id="end"></a>
<a name="finish" id="finish"></a>
<a name="stop" id="stop"></a>
<a name="credits" id="credits"></a>
</div></div></body>
</html>