Remove basename(1). Clean up/shorten some coreutils pipelines

Basenames that remain, in cmd/zed/zed.d/statechange-led.sh:
	dev=$(basename "$(echo "$therest" | awk '{print $(NF-1)}')")
	vdev=$(basename "$ZEVENT_VDEV_PATH")
I don't wanna interfere with #11988

scripts/zfs-tests.sh:
	SINGLETESTFILE=$(basename "$SINGLETEST")
tests/zfs-tests/tests/functional/cli_user/zfs_list/zfs_list.kshlib:
	ACTUAL=$(basename $dataset)
	ACTUAL=$(basename $dataset)
tests/zfs-tests/tests/functional/cli_user/zpool_iostat/
	zpool_iostat_-c_homedir.ksh:
	typeset USER_SCRIPT=$(basename "$USER_SCRIPT_FULL")
tests/zfs-tests/tests/functional/cli_user/zpool_iostat/
	zpool_iostat_-c_searchpath.ksh:
	typeset CMD_1=$(basename "$SCRIPT_1")
	typeset CMD_2=$(basename "$SCRIPT_2")
tests/zfs-tests/tests/functional/cli_user/zpool_status/
	zpool_status_-c_homedir.ksh:
	typeset USER_SCRIPT=$(basename "$USER_SCRIPT_FULL")
tests/zfs-tests/tests/functional/cli_user/zpool_status/
	zpool_status_-c_searchpath.ksh
	typeset CMD_1=$(basename "$SCRIPT_1")
	typeset CMD_2=$(basename "$SCRIPT_2")
tests/zfs-tests/tests/functional/migration/migration.cfg:
	export BNAME=`basename $TESTFILE`
tests/zfs-tests/tests/perf/perf.shlib:
	typeset logbase="$(get_perf_output_dir)/$(basename \
tests/zfs-tests/tests/perf/perf.shlib:
	typeset logbase="$(get_perf_output_dir)/$(basename \

These are potentially Of Directories, where basename is actually
useful

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12652

contrib/bpftrace/zfs-trace.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-ZVER=$(cut -f 1 -d '-' /sys/module/zfs/version)
+read -r ZVER < /sys/module/zfs/version
+ZVER="${ZVER%%-*}"
 KVER=$(uname -r)
 
 exec bpftrace \

contrib/dracut/02zfsexpandknowledge/module-setup.sh.in

@@ -2,8 +2,8 @@
 
 get_devtype() {
   local typ
-  typ=$(udevadm info --query=property --name="$1" | grep "^ID_FS_TYPE=" | sed 's|^ID_FS_TYPE=||')
-  if [ "$typ" = "" ] ; then
+  typ=$(udevadm info --query=property --name="$1" | sed -n 's|^ID_FS_TYPE=||p')
+  if [ -z "$typ" ] ; then
      typ=$(blkid -c /dev/null "$1" -o value -s TYPE)
   fi
   echo "$typ"
@@ -36,7 +36,6 @@ find_zfs_block_devices() {
     local dev
     local mp
     local fstype
-    local pool
     local _
     numfields="$(awk '{print NF; exit}' /proc/self/mountinfo)"
     if [ "$numfields" = "10" ] ; then
@@ -47,10 +46,7 @@ find_zfs_block_devices() {
     # shellcheck disable=SC2086
     while read -r ${fields?} ; do
        [ "$fstype" = "zfs" ] || continue
-       if [ "$mp" = "$1" ]; then
-           pool=$(echo "$dev" | cut -d / -f 1)
-           get_pool_devices "$pool"
-       fi
+       [ "$mp" = "$1" ] && get_pool_devices "${dev%%/*}"
     done < /proc/self/mountinfo
 }
 
@@ -100,9 +96,9 @@ if [ -n "$hostonly" ]; then
             majmin=$(get_maj_min "$dev")
             if [ -d "/sys/dev/block/$majmin/slaves" ] ; then
                 for _depdev in "/sys/dev/block/$majmin/slaves"/*; do
-                    [[ -f $_depdev/dev ]] || continue
-                    _depdev=/dev/$(basename "$_depdev")
-                    _depdevname=$(udevadm info --query=property --name="$_depdev" | grep "^DEVNAME=" | sed 's|^DEVNAME=||')
+                    [ -f "$_depdev/dev" ] || continue
+                    _depdev="/dev/${_depdev##*/}"
+                    _depdevname=$(udevadm info --query=property --name="$_depdev" | sed -n 's|^DEVNAME=||p')
                     _depdevtype=$(get_devtype "$_depdevname")
                     dinfo "zfsexpandknowledge: underlying block device backing ZFS dataset $mp: ${_depdevname//$'\n'/ }"
                     array_contains "$_depdevname" "${host_devs[@]}" || host_devs+=("$_depdevname")

contrib/dracut/90zfs/module-setup.sh.in

@@ -69,8 +69,8 @@ install() {
 	dracut_install @mounthelperdir@/mount.zfs
 	dracut_install @udevdir@/vdev_id
 	dracut_install awk
-	dracut_install basename
 	dracut_install cut
+	dracut_install tr
 	dracut_install head
 	dracut_install @udevdir@/zvol_id
 	inst_hook cmdline 95 "${moddir}/parse-zfs.sh"

contrib/dracut/90zfs/parse-zfs.sh.in

@@ -43,7 +43,7 @@ case "${root}" in
 		root="${root#FILESYSTEM=}"
 		root="zfs:${root#ZFS=}"
 		# switch + with spaces because kernel cmdline does not allow us to quote parameters
-		root=$(printf '%s\n' "$root" | sed "s/+/ /g")
+		root=$(echo "$root" | tr '+' ' ')
 		rootok=1
 		wait_for_zfs=1
 

contrib/dracut/90zfs/zfs-generator.sh.in

@@ -89,7 +89,7 @@ else
   _zfs_generator_cb() {
       dset="${1}"
       mpnt="${2}"
-      unit="sysroot$(echo "$mpnt" | sed 's;/;-;g').mount"
+      unit="sysroot$(echo "$mpnt" | tr '/' '-').mount"
 
       {
           echo "[Unit]"

contrib/initramfs/scripts/zfs

@@ -105,8 +105,7 @@ find_rootfs()
 find_pools()
 {
 	pools=$("$@" 2> /dev/null | \
-		grep -E "pool:|^[a-zA-Z0-9]" | \
-		sed 's@.*: @@' | \
+		sed -Ee '/pool:|^[a-zA-Z0-9]/!d' -e 's@.*: @@' | \
 		tr '\n' ';')
 
 	echo "${pools%%;}" # Return without the last ';'.
@@ -428,7 +427,7 @@ decrypt_fs()
 			else
 				# Temporarily setting "printk" to "7" allows the prompt to appear even when the "quiet" kernel option has been used
 				echo "load-key" > /run/zfs_console_askpwd_cmd
-				storeprintk="$(awk '{print $1}' /proc/sys/kernel/printk)"
+				read -r storeprintk _ < /proc/sys/kernel/printk
 				echo 7 > /proc/sys/kernel/printk
 				$ZFS load-key "${ENCRYPTIONROOT}"
 				echo "$storeprintk" > /proc/sys/kernel/printk