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author | Johannes Stoelp <johannes.stoelp@gmail.com> | 2024-02-13 00:36:48 +0100 |
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committer | Johannes Stoelp <johannes.stoelp@gmail.com> | 2024-02-13 00:36:48 +0100 |
commit | b08fc0727a7086560b9cd9217fdab5d07ffee45f (patch) | |
tree | 2b0e2532deb9baa07590aae9ee9d8f706883e4ec /src | |
parent | 8fdf124210ae6dfa48ece265a76c14ecde1ca78b (diff) | |
download | notes-b08fc0727a7086560b9cd9217fdab5d07ffee45f.tar.gz notes-b08fc0727a7086560b9cd9217fdab5d07ffee45f.zip |
bash: cmd grouping
Diffstat (limited to 'src')
-rw-r--r-- | src/tools/bash.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/tools/bash.md b/src/tools/bash.md index a2b7944..e12d8c0 100644 --- a/src/tools/bash.md +++ b/src/tools/bash.md @@ -112,6 +112,22 @@ once. vim -d <(grep foo bar) <(grep foo moose) ``` +## Command grouping + +Execute commands in a group with or without subshell. Can be used to easily +redirect stdout/stderr of all commands in the group into one file. +```bash +# Group commands without subshell. +v=abc ; { v=foo; echo $v; } ; echo $v +# foo +# foo + +# Group commands with subshell. +v=abc ; ( v=foo; echo $v; ) ; echo $v +# foo +# abc +``` + ## Argument parsing with `getopts` The `getopts` builtin uses following global variables: |