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--- posix_shell_getpots [2019/09/30 11:02]
rpjday [Starting points]
+++ posix_shell_getpots [2019/09/30 11:03]
rpjday [Starting points]
@@ Line 13: / Line 13: @@
 First, there has been much blood spilled discussing how to support //optional// arguments using ''getopts'' -- the correct solution is to not do that, as explained in Guideline 7 [[https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap12.html#tag_12_02|here]]. So we won't.
-And, second, if the //optstring// handed to getopts starts with a colon, then getopts uses what is called "silent error reporting"; this appears to be the recommended approach, so we'll stick with that. If you choose differently, you're on your own.
+And, second, if the //optstring// handed to getopts starts with a colon, then getopts uses what is called "silent error reporting"; this appears to be the recommended approach, so we'll stick with that. In short, don't do this:
+<code>
+while getopts ab:c: opt ; do
+</code>
+Do this:
+<code>
+while getopts :ab:c: opt ; do
+</code>
+Explanation below.

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