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process substitution <() bash

GitPaulo answered on October 3, 2021 Popularity 8/10 Helpfulness 7/10

answer process substitution <() bash

process substitution <() bash

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Process substitution feeds the output of a process (or processes)
into the stdin of another process

Because pipes create a new shell, $count wont be assigned
$ cat file | while read line; do ((count++)); done
$ echo $count

We can however use process subsititution to work around this:
$ while read line; do ((count++)); done < <(cat file)
$ echo $count  # the variable *does* exist in the current shell

Popularity 8/10 Helpfulness 7/10 Language shell

Source: Grepper

Tags: bash process-substitution shell

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Contributed on Oct 03 2021

GitPaulo

0 Answers Avg Quality 2/10

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