mirror of https://github.com/tLDP/LDP
38 lines
1.0 KiB
Bash
38 lines
1.0 KiB
Bash
#!/bin/bash
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# Prepends a string at a specified line
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#+ in files with names ending in "sample"
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#+ in the current working directory.
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# 000000000000000000000000000000000000
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# This script overwrites files!
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# Be careful running it in a directory
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#+ where you have important files!!!
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# 000000000000000000000000000000000000
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# Create a couple of files to operate on ...
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# 01sample
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# 02sample
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# ... etc.
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# These files must not be empty, else the prepend will not work.
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lineno=1 # Append at line 1 (prepend).
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filespec="*sample" # Filename pattern to operate on.
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string=$(whoami) # Will set your username as string to insert.
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# It could just as easily be any other string.
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for file in $filespec # Specify which files to alter.
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do # ^^^^^^^^^
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sed -i ""$lineno"i "$string"" $file
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# ^^ -i option edits files in-place.
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# ^ Insert (i) command.
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echo ""$file" altered!"
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done
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echo "Warning: files possibly clobbered!"
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exit 0
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# Exercise:
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# Add error checking to this script.
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# It needs it badly.
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