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| author | johannst <johannes.stoelp@gmail.com> | 2021-01-09 20:25:49 +0100 |
|---|---|---|
| committer | johannst <johannes.stoelp@gmail.com> | 2021-01-09 20:25:49 +0100 |
| commit | ce946dc97b38a720a8eb4980bbd43cd702e86614 (patch) | |
| tree | 1453301bc1e62ccc4dd2abbb5a5b10370f005eaa /src/tools/bash.md | |
| parent | b7f4aee7a60b03db06475f2a017706494d9a2d44 (diff) | |
| download | notes-ce946dc97b38a720a8eb4980bbd43cd702e86614.tar.gz notes-ce946dc97b38a720a8eb4980bbd43cd702e86614.zip | |
update bash/zsh notes
Diffstat (limited to 'src/tools/bash.md')
| -rw-r--r-- | src/tools/bash.md | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/tools/bash.md b/src/tools/bash.md index 3f53045..201a6ad 100644 --- a/src/tools/bash.md +++ b/src/tools/bash.md @@ -16,9 +16,12 @@ ### Parameter ```bash -# default param +# default value bar=${foo:-some_val} # if $foo set, then bar=$foo else bar=some_val +# alternate value +bar=${foo:+bla $foo} # if $foo set, then bar="bla $foo" else bar="" + # check param set bar=${foo:?msg} # if $foo set, then bar=$foo else exit and print msg |