Created
July 24, 2015 22:02
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| #! /bin/sh | |
| echo "$0 [FILE] -- print a message to STDOUT or FILE" >&2 | |
| if [ -z $1 ]; then | |
| exec 3>&1 # stdout | |
| else | |
| exec 3>"$1" # file | |
| fi | |
| echo hello this is dog >&3 |
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