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Diffstat (limited to 'fetchmail-FAQ.html')
| -rw-r--r-- | fetchmail-FAQ.html | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/fetchmail-FAQ.html b/fetchmail-FAQ.html index a14b2d09..5abc4656 100644 --- a/fetchmail-FAQ.html +++ b/fetchmail-FAQ.html @@ -115,8 +115,9 @@ often than others?</a><br/> <a href="#C6">C6. Fetchmail works OK started up manually, but not from an init script.</a><br/> <a href="#C7">C7. How can I forward mail to another -host?.</a><br/> - +host?</a><br/> +<a href="#C8">C8. Why is "NOMAIL" an error?/I frequently get messages +from cron!</a><br/> <h2 id="C_T">How to make fetchmail play nice with various MTAs</h2> @@ -1290,6 +1291,37 @@ host?</a></h2> fetchmail on, use the <code>smtphost</code> or <code>smtpname</code> option. See the manual page for details.</p> +<h2><a id="C8" name="C8">C8. Why is "NOMAIL" an error?/I frequently get messages +from cron!</a></h2> + +<p>Some users want to write scripts that take action only if mail +could/could not be retrieved, thus fetchmail reports if it has retrieved +messages or not.</p> + +<p>If you do not want "no mail" to be an error condition (for instance, +for cron jobs), use a POSIX-compliant shell and add this to the end of +the fetchmail command line, it will change an exit code of 1 to 0 and +others to 1:</p> +<pre> +|| [ $? -eq 1 ] +</pre> + +<p>If you want to map more than one code to 0, you cannot cascade multiple +<strong>|| [ $? -eq N ]</strong>, but you must instead use the +<strong>-o</strong> operator inside the brackets, (see the test(1) +manpage for details), such as:</p> + +<pre> +|| [ $? -eq 1 -o $? -eq 9 ] +</pre> + +<p>A full cron line might then look like this:</p> + +<pre> +*/15 * * * * fetchmail -s || [ $? -eq 1 ] +</pre> + + <hr/> <h1>How to make fetchmail play nice with various MTAs</h1> <h2><a id="T1" name="T1">T1. How can I use fetchmail with |