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| 16 | <title>8.12.1 Template Objects </title> |
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| 54 | <H2><A NAME="SECTION00101210000000000000000"></A><A NAME="template-objects"></A> |
| 55 | <BR> |
| 56 | 8.12.1 Template Objects |
| 57 | </H2> |
| 58 | |
| 59 | <P> |
| 60 | Template objects following methods: |
| 61 | |
| 62 | <P> |
| 63 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 64 | <td><nobr><b><tt id='l2h-3032' xml:id='l2h-3032' class="method">reset</tt></b>(</nobr></td> |
| 65 | <td><var></var>)</td></tr></table></dt> |
| 66 | <dd> |
| 67 | Restore a pipeline template to its initial state. |
| 68 | </dl> |
| 69 | |
| 70 | <P> |
| 71 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 72 | <td><nobr><b><tt id='l2h-3033' xml:id='l2h-3033' class="method">clone</tt></b>(</nobr></td> |
| 73 | <td><var></var>)</td></tr></table></dt> |
| 74 | <dd> |
| 75 | Return a new, equivalent, pipeline template. |
| 76 | </dl> |
| 77 | |
| 78 | <P> |
| 79 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 80 | <td><nobr><b><tt id='l2h-3034' xml:id='l2h-3034' class="method">debug</tt></b>(</nobr></td> |
| 81 | <td><var>flag</var>)</td></tr></table></dt> |
| 82 | <dd> |
| 83 | If <var>flag</var> is true, turn debugging on. Otherwise, turn debugging |
| 84 | off. When debugging is on, commands to be executed are printed, and |
| 85 | the shell is given <code>set -x</code> command to be more verbose. |
| 86 | </dl> |
| 87 | |
| 88 | <P> |
| 89 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 90 | <td><nobr><b><tt id='l2h-3035' xml:id='l2h-3035' class="method">append</tt></b>(</nobr></td> |
| 91 | <td><var>cmd, kind</var>)</td></tr></table></dt> |
| 92 | <dd> |
| 93 | Append a new action at the end. The <var>cmd</var> variable must be a valid |
| 94 | bourne shell command. The <var>kind</var> variable consists of two letters. |
| 95 | |
| 96 | <P> |
| 97 | The first letter can be either of <code>'-'</code> (which means the command |
| 98 | reads its standard input), <code>'f'</code> (which means the commands reads |
| 99 | a given file on the command line) or <code>'.'</code> (which means the commands |
| 100 | reads no input, and hence must be first.) |
| 101 | |
| 102 | <P> |
| 103 | Similarly, the second letter can be either of <code>'-'</code> (which means |
| 104 | the command writes to standard output), <code>'f'</code> (which means the |
| 105 | command writes a file on the command line) or <code>'.'</code> (which means |
| 106 | the command does not write anything, and hence must be last.) |
| 107 | </dl> |
| 108 | |
| 109 | <P> |
| 110 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 111 | <td><nobr><b><tt id='l2h-3036' xml:id='l2h-3036' class="method">prepend</tt></b>(</nobr></td> |
| 112 | <td><var>cmd, kind</var>)</td></tr></table></dt> |
| 113 | <dd> |
| 114 | Add a new action at the beginning. See <tt class="method">append()</tt> for explanations |
| 115 | of the arguments. |
| 116 | </dl> |
| 117 | |
| 118 | <P> |
| 119 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 120 | <td><nobr><b><tt id='l2h-3037' xml:id='l2h-3037' class="method">open</tt></b>(</nobr></td> |
| 121 | <td><var>file, mode</var>)</td></tr></table></dt> |
| 122 | <dd> |
| 123 | Return a file-like object, open to <var>file</var>, but read from or |
| 124 | written to by the pipeline. Note that only one of <code>'r'</code>, |
| 125 | <code>'w'</code> may be given. |
| 126 | </dl> |
| 127 | |
| 128 | <P> |
| 129 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> |
| 130 | <td><nobr><b><tt id='l2h-3038' xml:id='l2h-3038' class="method">copy</tt></b>(</nobr></td> |
| 131 | <td><var>infile, outfile</var>)</td></tr></table></dt> |
| 132 | <dd> |
| 133 | Copy <var>infile</var> to <var>outfile</var> through the pipe. |
| 134 | </dl> |
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