49 lines
948 B
Bash
Executable file
49 lines
948 B
Bash
Executable file
#!/bin/sh
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# It just swaps two files
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export DAISY_INTERNAL1
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. $(dirname $(realpath $0))/daisy.source
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file1=$1
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file2=$2
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function helpFn()
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{
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error=$?
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if [[ $error -gt 0 ]];
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then
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error_text=$(perl -E 'say $!=shift' $error)
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echo "$DAISY_BIN error ($error): $error_text"
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fi
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echo "Usage: $DAISY_BIN <file1> <file2>"
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echo Swap two files in a filesystem.
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exit $error
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}
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if [[ $@ == *"--help"* ]];
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then
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helpFn
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elif [[ $@ == '' ]];
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then
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echo "No arguments specified."
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helpFn
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fi
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# We set a trap here, together with 'set -e' above,
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# this makes sure we exit gracefully if we have an
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# error in one of the ls or mv calls.
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trap helpFn ERR
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# We want to swap two files
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# Easy, but let's be safe about it
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ls "$file1" >/dev/null
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ls "$file2" >/dev/null
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# Files should exist, now we move
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mv "$file1" "$file1.sw"
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mv "$file2" "$file2.sw"
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# We got our moved copies, now we simply rename
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mv "$file1.sw" "$file2"
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mv "$file2.sw" "$file1"
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