Bash Bunch,
Not surprisingly, bash does not exit the script when an error is detected in
a subshell.
I am hopeful that someone has a solution to this (other than: be careful to
not use subshells).
Here is the test run:
-------------------
./subshellnofail.sh
BEGIN
ERROR: ./subshellnofail.sh 10 <- would like the script to stop here.
ONE
ERROR: ./subshellnofail.sh 10
-------------------
Here is the sample script:
------------------
#!/bin/bash
set -o errexit
set -o noclobber
set -o nounset
set -o pipefail # if you fail on this line, get a newer version of bash.
function traperr
{
echo "ERROR: ${BASH_SOURCE[0]} ${LINENO}"
# exit 1 # does not seem to affect the program.
# return 1 # does not seem to affect the program.
}
set -o errtrace
trap traperr ERR
echo "BEGIN"
cat /etc/passwd |while read aLine
do
# in a subshell
test=$(true | false | true |false);
done
echo "ONE"
while read aLine
do
# not in a subshell
test=$(true | false | true |false);
done </etc/passwd
echo "TWO"
test=$(true | false | true |false);
echo "END"
exit 0
-----------------
echo $BASH_VERSION
3.2.17(1)-release
