ios - shell脚本中set -e是什么意思

Question

我看了一下某个脚本，最开始的两行是

set -e
set -o pipefail

请问这两句是什么意思呢？

Answer 1

$ set -e

If any code after this line of code returns a non-zero value, the entire script will exit immediately. The official explanation is to prevent errors from snowballing

$ set -o pipefail

The original explanation is as follows:

If set, the return value of a pipeline is the value of the last (rightmost) command to exit with a non-zero status,or zero if all commands in the pipeline exit successfully. This option is disabled by default.

can be understood as:

Tells bash to return the return value of the first pipe command from right to left that exits with a non-zero status, or 0 if all commands are executed successfully

Answer 2

Thank you for your answer. My backup script just needs set -e