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Date:   Mon, 25 Feb 2019 11:57:51 -0700
From:   Andreas Dilger <adilger@...ger.ca>
To:     tytso@....edu
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [PATCH v3] tests: replace perl usage with shell built-in

On Dec 13, 2018, at 11:06 AM, Andreas Dilger <adilger@...ger.ca> wrote:
> 
> A couple of tests use perl only for generating a string of
> N characters long.  Instead of requiring perl just for a few
> tests, use shell built-in commands and don't spawn a separate
> subshell just to get a string of characters.
> 
> Signed-off-by: Andreas Dilger <adilger@...ger.ca>

Ping.

> ---
> tests/d_xattr_sorting/script    |  3 ++-
> tests/f_badsymlinks2/mkimage.sh |  4 +++-
> tests/f_create_symlinks/script  | 12 ++++++------
> util/gen-sample-fs              |  4 +++-
> 4 files changed, 14 insertions(+), 9 deletions(-)
> 
> diff --git a/tests/d_xattr_sorting/script b/tests/d_xattr_sorting/script
> index 8666115..49bcece 100644
> --- a/tests/d_xattr_sorting/script
> +++ b/tests/d_xattr_sorting/script
> @@ -22,7 +22,8 @@ echo Exit status is $status >> $OUT.new
> 
> B=$(mktemp ${TMPDIR:-/tmp}/b.XXXXXX)
> 
> -perl -e 'print "x" x 256;' > $B
> +F="xxxx"; F+=$F$F$F; F+=$F$F$F; F+=$F$F$F
> +printf "%s" $F > $B
> 
> echo "ea_set -f /tmp/b / security.SMEG64" >> $OUT.new
> $DEBUGFS -w -R "ea_set -f $B / security.SMEG64" $TMPFILE >> $OUT.new 2>&1
> diff --git a/tests/f_badsymlinks2/mkimage.sh b/tests/f_badsymlinks2/mkimage.sh
> index 6bbf020..fe0ebb7 100755
> --- a/tests/f_badsymlinks2/mkimage.sh
> +++ b/tests/f_badsymlinks2/mkimage.sh
> @@ -18,10 +18,12 @@ do_tune2fs() {
> 	mount image mnt
> }
> 
> +A="AAAA"; A+=$A$A$A; A+=$A$A$A; A+=$A$A$A; A+=$A$A$A; A+=$A$A$A
> symlink() {
> 	local len=$1
> 	local src=$2
> -	local target=$(perl -e 'print "A" x '$len)
> +	local target=${A:0:$len}
> +
> 	ln -s $target $src
> 	stat -c %i $src
> }
> diff --git a/tests/f_create_symlinks/script b/tests/f_create_symlinks/script
> index 169f58d..72741fd 100644
> --- a/tests/f_create_symlinks/script
> +++ b/tests/f_create_symlinks/script
> @@ -15,22 +15,22 @@ fi
> dd if=/dev/zero of=$TMPFILE bs=1k count=512 > /dev/null 2>&1
> 
> echo mke2fs -q -F -o Linux -b 1024 -g 256 -O inline_data,extents -I 256 test.img 1024 > $OUT.new
> -$MKE2FS -q -F -o Linux -b 1024 -g 256 -O inline_data,extents -I 256 $TMPFILE 1024 >> $OUT 2>&1
> +$MKE2FS -q -F -o Linux -b 1024 -g 256 -O inline_data,extents -I 256 $TMPFILE 1024 >> $OUT.new 2>&1
> 
> $FSCK $FSCK_OPT  -N test_filesys $TMPFILE >> $OUT.new 2>&1
> status=$?
> echo Exit status is $status >> $OUT.new
> 
> +B="xxxx"; B+=$B$B$B; B+=$B$B$B; B+=$B$B$B; B+=$B$B$B$B$B
> for i in 30 60 70 500 1023 1024 1500; do
> -	echo "debugfs -R \"symlink /l_$i $(perl -e "print 'x' x $i;")\" test.img" >> $OUT.new
> -	$DEBUGFS -w -R "symlink /l_$i $(perl -e "print 'x' x $i;")" $TMPFILE \
> -		 2>&1 | sed -f $cmd_dir/filter.sed >> $OUT.new
> +	echo "debugfs -R \"symlink /l_$i ${B:0:i}\" test.img" >> $OUT.new
> +	$DEBUGFS -w -R "symlink /l_$i ${B:0:i}" $TMPFILE >> $OUT.new 2>&1
> done
> +unset B
> 
> for i in 30 60 70 500 1023 1024 1500; do
> 	echo "debugfs -R \"stat /l_$i\" test.img" >> $OUT.new
> -	$DEBUGFS -R "stat /l_$i" $TMPFILE 2>&1 | \
> -		 grep -v "time: " >> $OUT.new
> +	$DEBUGFS -R "stat /l_$i" $TMPFILE 2>&1 | grep -v "time: " >> $OUT.new
> done
> 
> $FSCK $FSCK_OPT  -N test_filesys $TMPFILE >> $OUT.new 2>&1
> diff --git a/util/gen-sample-fs b/util/gen-sample-fs
> index 8e13916..a92c822 100755
> --- a/util/gen-sample-fs
> +++ b/util/gen-sample-fs
> @@ -7,8 +7,10 @@ cp /dev/null $FS
> mke2fs -q -t ext4 -O inline_data,^has_journal -I 256 -b 4096 -N 64 $FS 256
> mount -t ext4 $FS $MNT
> ln -s symlink_data $MNT/symlink
> +
> +L="xxxx"; L+=$L$L$L; L+=$L$L$L; L+=$L$L$L; L+=$L$L$L
> for i in 30 70 500 1023 1024; do
> -	ln -s /$(perl -e "print 'x' x $i;") $MNT/l_$i
> +	ln -s /${L:0:$i} $MNT/l_$i
> done
> touch $MNT/acl
> setfacl -m u:daemon:r $MNT/acl
> --
> 1.8.0
> 


Cheers, Andreas






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