45 lines
921 B
Bash
Executable File
45 lines
921 B
Bash
Executable File
#!/bin/sh
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if [ -n "${2}" ]; then
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printf 'Expected only one argument\n'
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exit 1
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elif [ -z "${1}" ]; then
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printf 'No file path provided\n'
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exit 1
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elif [ "$(id -u)" -eq 0 ]; then
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printf 'Cannot be run as root\n'
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exit 1
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fi
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set -eu
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tempdir="$(mktemp -d)"
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trap 'rm -rf $tempdir' EXIT
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srcfile="$(doas realpath "$1")"
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if doas [ -f "$srcfile" ]; then
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doas cp -a "$srcfile" "$tempdir"/file
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doas cp -a "$tempdir"/file "$tempdir"/edit
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# make sure that the file is editable by user
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doas chown "$USER":"$USER" "$tempdir"/edit
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chmod 600 "$tempdir"/edit
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else
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# create file with "regular" system permissions (root:root 644)
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touch "$tempdir"/file
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doas chown root:root "$tempdir"/file
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fi
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$EDITOR "$tempdir"/edit
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doas tee "$tempdir"/file 1>/dev/null < "$tempdir"/edit
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if doas cmp -s "$tempdir/file" "$srcfile"; then
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printf 'Skipping write; no changes.\n'
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exit 0
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else
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doas mv -f "$tempdir"/file "$srcfile"
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exit 0
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fi
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