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chbg: avoid the TOCTOU race

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SilverAg.L
2026-01-06 19:31:05 +08:00
parent 0ef0ef2562
commit ca2f125654
1 changed files with 12 additions and 12 deletions
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24
bin/chbg
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@@ -1,12 +1,12 @@
#!/bin/bash #!/bin/bash
# to change wallpapers both niri workspace and niri tab view # to change wallpapers both niri workspace and niri tab view
[ -z "$1" ] && { [ -z "$1" ] && {
echo "Usage: ${0##*/} <image-file>" echo "Usage: ${0##*/} <image-file>"
exit 1 exit 1
} }
fsize=$(magick identify -format "%w %h" -- "$1" 2>/dev/null) || { fsize=$(magick identify -format "%w %h" -- "$1" 2>/dev/null) || {
echo "ERROR: unable to identify. is it an EXISTING ACCESSIBLE IMAGE file?" echo "ERROR: unable to identify. is it an EXISTING ACCESSIBLE IMAGE file?"
exit 1 exit 1
} }
WP_DIR="${XDG_DATA_HOME:-$HOME/.local/share}" WP_DIR="${XDG_DATA_HOME:-$HOME/.local/share}"
@@ -14,14 +14,14 @@ finput=$1
read -r fw fh <<< "$fsize" read -r fw fh <<< "$fsize"
(( fw > 3840 && fh > 2160 )) && { (( fw > 3840 && fh > 2160 )) && {
finput="$(mktemp --dry-run).webp" finput=$(mktemp "${TMPDIR:-/tmp}/chbg.XXXXXXXX.webp")
trap 'rm -f "$finput"' EXIT trap 'rm -f "$finput"' EXIT
echo "WARNING: image too large, resizing ..." echo "WARNING: image too large, resizing ..."
# echo "DEBUG: resized image at $finput" # echo "DEBUG: resized image at $finput"
magick "$1" -resize "3840x2160^" \ magick "$1" -resize "3840x2160^" \
-quality 90 \ -quality 90 \
-define webp:method=6 \ -define webp:method=6 \
-define webp:alpha-quality=100 "$finput" -define webp:alpha-quality=100 "$finput"
} }
echo -n "making blurred version of ${1##*/} ... " echo -n "making blurred version of ${1##*/} ... "