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| 54 | ||
| 55 | <H1><A NAME="SECTION00101600000000000000000"> | |
| 56 | 8.16 <tt class="module">syslog</tt> -- | |
| 57 | <span class="Unix">Unix</span> syslog library routines</A> | |
| 58 | </H1> | |
| 59 | ||
| 60 | <P> | |
| 61 | <A NAME="module-syslog"></A> | |
| 62 | <p class="availability">Availability: <span | |
| 63 | class="platform">Unix</span>.</p> | |
| 64 | ||
| 65 | <P> | |
| 66 | This module provides an interface to the <span class="Unix">Unix</span> <code>syslog</code> library | |
| 67 | routines. Refer to the <span class="Unix">Unix</span> manual pages for a detailed description | |
| 68 | of the <code>syslog</code> facility. | |
| 69 | ||
| 70 | <P> | |
| 71 | The module defines the following functions: | |
| 72 | ||
| 73 | <P> | |
| 74 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 75 | <td><nobr><b><tt id='l2h-3082' xml:id='l2h-3082' class="function">syslog</tt></b>(</nobr></td> | |
| 76 | <td><var></var><big>[</big><var>priority,</var><big>]</big><var> message</var>)</td></tr></table></dt> | |
| 77 | <dd> | |
| 78 | Send the string <var>message</var> to the system logger. A trailing | |
| 79 | newline is added if necessary. Each message is tagged with a priority | |
| 80 | composed of a <var>facility</var> and a <var>level</var>. The optional | |
| 81 | <var>priority</var> argument, which defaults to <tt class="constant">LOG_INFO</tt>, | |
| 82 | determines the message priority. If the facility is not encoded in | |
| 83 | <var>priority</var> using logical-or (<code>LOG_INFO | LOG_USER</code>), the | |
| 84 | value given in the <tt class="function">openlog()</tt> call is used. | |
| 85 | </dl> | |
| 86 | ||
| 87 | <P> | |
| 88 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 89 | <td><nobr><b><tt id='l2h-3083' xml:id='l2h-3083' class="function">openlog</tt></b>(</nobr></td> | |
| 90 | <td><var>ident</var><big>[</big><var>, logopt</var><big>[</big><var>, facility</var><big>]</big><var></var><big>]</big><var></var>)</td></tr></table></dt> | |
| 91 | <dd> | |
| 92 | Logging options other than the defaults can be set by explicitly | |
| 93 | opening the log file with <tt class="function">openlog()</tt> prior to calling | |
| 94 | <tt class="function">syslog()</tt>. The defaults are (usually) <var>ident</var> = | |
| 95 | <code>'syslog'</code>, <var>logopt</var> = <code>0</code>, <var>facility</var> = | |
| 96 | <tt class="constant">LOG_USER</tt>. The <var>ident</var> argument is a string which is | |
| 97 | prepended to every message. The optional <var>logopt</var> argument is a | |
| 98 | bit field - see below for possible values to combine. The optional | |
| 99 | <var>facility</var> argument sets the default facility for messages which | |
| 100 | do not have a facility explicitly encoded. | |
| 101 | </dl> | |
| 102 | ||
| 103 | <P> | |
| 104 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 105 | <td><nobr><b><tt id='l2h-3084' xml:id='l2h-3084' class="function">closelog</tt></b>(</nobr></td> | |
| 106 | <td><var></var>)</td></tr></table></dt> | |
| 107 | <dd> | |
| 108 | Close the log file. | |
| 109 | </dl> | |
| 110 | ||
| 111 | <P> | |
| 112 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 113 | <td><nobr><b><tt id='l2h-3085' xml:id='l2h-3085' class="function">setlogmask</tt></b>(</nobr></td> | |
| 114 | <td><var>maskpri</var>)</td></tr></table></dt> | |
| 115 | <dd> | |
| 116 | Set the priority mask to <var>maskpri</var> and return the | |
| 117 | previous mask value. Calls to <tt class="function">syslog()</tt> with a priority | |
| 118 | level not set in <var>maskpri</var> are ignored. The default is to log all | |
| 119 | priorities. The function <code>LOG_MASK(<var>pri</var>)</code> calculates the | |
| 120 | mask for the individual priority <var>pri</var>. The function | |
| 121 | <code>LOG_UPTO(<var>pri</var>)</code> calculates the mask for all priorities up | |
| 122 | to and including <var>pri</var>. | |
| 123 | </dl> | |
| 124 | ||
| 125 | <P> | |
| 126 | The module defines the following constants: | |
| 127 | ||
| 128 | <P> | |
| 129 | <DL> | |
| 130 | <DT><STRONG>Priority levels (high to low):</STRONG></DT> | |
| 131 | <DD><P> | |
| 132 | <tt class="constant">LOG_EMERG</tt>, <tt class="constant">LOG_ALERT</tt>, <tt class="constant">LOG_CRIT</tt>, | |
| 133 | <tt class="constant">LOG_ERR</tt>, <tt class="constant">LOG_WARNING</tt>, <tt class="constant">LOG_NOTICE</tt>, | |
| 134 | <tt class="constant">LOG_INFO</tt>, <tt class="constant">LOG_DEBUG</tt>. | |
| 135 | ||
| 136 | <P> | |
| 137 | </DD> | |
| 138 | <DT><STRONG>Facilities:</STRONG></DT> | |
| 139 | <DD><P> | |
| 140 | <tt class="constant">LOG_KERN</tt>, <tt class="constant">LOG_USER</tt>, <tt class="constant">LOG_MAIL</tt>, | |
| 141 | <tt class="constant">LOG_DAEMON</tt>, <tt class="constant">LOG_AUTH</tt>, <tt class="constant">LOG_LPR</tt>, | |
| 142 | <tt class="constant">LOG_NEWS</tt>, <tt class="constant">LOG_UUCP</tt>, <tt class="constant">LOG_CRON</tt> and | |
| 143 | <tt class="constant">LOG_LOCAL0</tt> to <tt class="constant">LOG_LOCAL7</tt>. | |
| 144 | ||
| 145 | <P> | |
| 146 | </DD> | |
| 147 | <DT><STRONG>Log options:</STRONG></DT> | |
| 148 | <DD><P> | |
| 149 | <tt class="constant">LOG_PID</tt>, <tt class="constant">LOG_CONS</tt>, <tt class="constant">LOG_NDELAY</tt>, | |
| 150 | <tt class="constant">LOG_NOWAIT</tt> and <tt class="constant">LOG_PERROR</tt> if defined in | |
| 151 | <code><syslog.h></code>. | |
| 152 | ||
| 153 | <P> | |
| 154 | </DD> | |
| 155 | </DL> | |
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| 191 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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