Created
July 19, 2018 18:02
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Subshells. Is the output 00, 11, 01, or 10?
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| #! /bin/bash | |
| x=0 | |
| y=0 | |
| read x <<EOF | |
| 1 | |
| EOF | |
| echo 1 | read y | |
| echo "$x$y" |
The pipe construct creates a subshell, so y is set in the subshell only.
$ echo 123 | (read y; echo $y)
123
but
$ y=0; echo 1 | read y; echo $y
0
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The program prints
10.