git: f62c1f3f8e91 - main - locate.updatedb: Explicitly exit from trap code.

The branch main has been updated by des:

URL: https://cgit.FreeBSD.org/src/commit/?id=f62c1f3f8e91c78d402e1db4e518e4899a4ba2b9

commit f62c1f3f8e91c78d402e1db4e518e4899a4ba2b9
Author:     Dag-Erling Smørgrav <des@FreeBSD.org>
AuthorDate: 2024-08-29 15:05:47 +0000
Commit:     Dag-Erling Smørgrav <des@FreeBSD.org>
CommitDate: 2024-08-29 15:05:47 +0000

    locate.updatedb: Explicitly exit from trap code.
    
    When a signal is trapped, the script continues after the trap code has
    run, unless the trap code explicitly exits.  In the particular case of
    locate.updatedb, this is mostly harmless, except that the trap code is
    executed twice (once for the signal and once when we reach the end of
    the script), but it's still worth fixing.
    
    Furthermore, install the trap as soon as we've created the temporary
    directory, to minimize the window during which we can fail to clean up
    after ourselves if interrupted.
    
    While here, simplify the empty check at the end and make some minor
    style tweaks.
    
    MFC after:      1 week
    Sponsored by:   Klara, Inc.
    Reviewed by:    kevans
    Differential Revision:  https://reviews.freebsd.org/D46475
---
 usr.bin/locate/locate/updatedb.sh | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/usr.bin/locate/locate/updatedb.sh b/usr.bin/locate/locate/updatedb.sh
index ff7ec7f6c18e..ca1a79116a91 100644
--- a/usr.bin/locate/locate/updatedb.sh
+++ b/usr.bin/locate/locate/updatedb.sh
@@ -42,13 +42,14 @@ fi
 # The directory containing locate subprograms
 : ${LIBEXECDIR:=/usr/libexec}; export LIBEXECDIR
 : ${TMPDIR:=/tmp}; export TMPDIR
-if ! TMPDIR=`mktemp -d $TMPDIR/locateXXXXXXXXXX`; then
+if ! TMPDIR=$(mktemp -d $TMPDIR/locateXXXXXXXXXX); then
 	exit 1
 fi
+tmp=$TMPDIR/_updatedb$$
+trap 'rc=$?; rm -f $tmp; rmdir $TMPDIR; trap - 0; exit $rc' 0 1 2 3 5 10 15
 
 PATH=$LIBEXECDIR:/bin:/usr/bin:$PATH; export PATH
 
-
 : ${mklocatedb:=locate.mklocatedb}	 # make locate database program
 : ${FCODES:=/var/db/locate.database}	 # the database
 : ${SEARCHPATHS="/"}		# directories to be put in the database
@@ -87,17 +88,13 @@ if [ -n "$PRUNEDIRS" ]; then
 	done
 fi
 
-tmp=$TMPDIR/_updatedb$$
-trap 'rm -f $tmp; rmdir $TMPDIR' 0 1 2 3 5 10 15
-		
 # search locally
 if $find -s $SEARCHPATHS $excludes -or -print 2>/dev/null |
         $mklocatedb -presort > $tmp
 then
-	if [ -n "$($find $tmp -size -257c -print)" ]; then
+	if ! grep -aq / $tmp; then
 		echo "updatedb: locate database $tmp is empty" >&2
 		exit 1
-	else
-		cat $tmp > $FCODES		# should be cp?
 	fi
+	install $tmp $FCODES
 fi