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Diffstat (limited to 'src/tools/bash.md')
| -rw-r--r-- | src/tools/bash.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/tools/bash.md b/src/tools/bash.md index 9150963..a2b7944 100644 --- a/src/tools/bash.md +++ b/src/tools/bash.md @@ -104,6 +104,14 @@ command 2>&1 >file 1. duplicate `fd 1` to `fd 2`, effectively redirecting `stderr` to `stdout` 2. redirect `stdout` to `file` +## Process substitution ([ref][psub]) + +Process substitution allows to redirect the stdout of multiple processes at +once. +```bash +vim -d <(grep foo bar) <(grep foo moose) +``` + ## Argument parsing with `getopts` The `getopts` builtin uses following global variables: @@ -227,3 +235,4 @@ complete -F _foo foo ``` [dup2]: http://man7.org/linux/man-pages/man2/dup.2.html +[psub]: https://tldp.org/LDP/abs/html/process-sub.html |