☰

Update bash-gotchas.md

David Stark committed 2020-06-02 01:10:16 +0100 commit 972258d42ab2a0444d50fa595592857bb4e08ef6

				compute/bash-gotchas.md
			
          @@ -2,7 +2,7 @@

           This kind of shit is why sysadmins drink.

           ### (( )) can return false 

          -(Iff)[https://en.wikipedia.org/wiki/If_and_only_if] the expression in (( )) evaluates to 0, the (( )) returns false, so your 'set -e' script will fall on its arse.

          +[Iff](https://en.wikipedia.org/wiki/If_and_only_if) the expression in (( )) evaluates to 0, the (( )) returns false, so your 'set -e' script will fall on its arse.

           ### pipes into read can return false

           In some old versions of bash (e.g. RHEL6), piping commands into `while read -r blah` will fail at the end of the stream.

...	...	@@ -2,7 +2,7 @@
2	2	This kind of shit is why sysadmins drink.
3	3
4	4	### (( )) can return false
5		-(Iff)[https://en.wikipedia.org/wiki/If_and_only_if] the expression in (( )) evaluates to 0, the (( )) returns false, so your 'set -e' script will fall on its arse.
	5	+[Iff](https://en.wikipedia.org/wiki/If_and_only_if) the expression in (( )) evaluates to 0, the (( )) returns false, so your 'set -e' script will fall on its arse.
6	6
7	7	### pipes into read can return false
8	8	In some old versions of bash (e.g. RHEL6), piping commands into `while read -r blah` will fail at the end of the stream.