bin/bins: Allow multiple instances to be ran concurrently

Use a unique temporary file for each instance, so that when more than
one is active at the same time, they don't try to "mv" the "bins-tmp"
file more than once.

1 files changed, 4 insertions, 3 deletions

diff --git a/bin/bins b/bin/bins
index 710cf8a..1b28089 100755
--- a/bin/bins
+++ b/bin/bins
@@ -67,9 +67,10 @@ IFS=:
 # Word-splitting is the goal:
 # shellcheck disable=2086
 if stest -rdq -n "$F" $PATH; then
-	trap 'rm -f $F-tmp' EXIT
-	stest -lxf $PATH | sort -u > "$F"-tmp
-	mv "$F"-tmp "$F"
+	T="$(mkstemp)"
+	trap 'rm -f $T' EXIT
+	stest -lxf $PATH | sort -u > "$T"
+	mv "$T" "$F"
 fi
 
 cat "$F"