Add chroot(8) feature. Some minor fixes.

beadm

@@ -33,7 +33,7 @@ PATH=${PATH}:/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
 # check FreeBSD version
 if [ $( uname -r | cut -d '-' -f1 | cut -d '.' -f1 ) -lt 8 ]
 then
-  echo "ERROR: beadm works on FreeBSD 8.0 or later"
+  echo "ERROR: beadm(8) works on FreeBSD 8.0 or later"
   exit 1
 fi
 
@@ -50,7 +50,7 @@ then
   echo "  /  /  //  ___//  /  //  /  //  /  /  /\ \ /  /  // /  "
   echo "  \____/ \____/ \_____\\\____//__/__/__/  \_\\\____//_/ "
   echo
-  echo "beadm 1.3.4 2022/03/09"
+  echo "beadm 1.3.5 2022/05/06"
   echo
   exit 0
 fi
@@ -69,6 +69,7 @@ __usage() {
   echo "  ${NAME} rename <origBeName> <newBeName>"
   echo "  ${NAME} mount <beName> [mountpoint]"
   echo "  ${NAME} { umount | unmount } [-f] <beName>"
+  echo "  ${NAME} chroot <beName>"
   echo "  ${NAME} reroot <beName>"
   echo "  ${NAME} version"
   exit 1
@@ -889,8 +890,8 @@ EOF
     else
       __usage
     fi
-    __be_exist "${POOL}/${BEDS}/${2}"
-    if __be_mounted "${POOL}/${BEDS}/${2}"
+    __be_exist ${POOL}/${BEDS}/${2}
+    if __be_mounted ${POOL}/${BEDS}/${2}
     then
       MNT=$( mount | grep -E "^${POOL}/${BEDS}/${2} " | awk '{print $3}' )
       echo "Boot environment '${2}' is already mounted at '${MNT}'"
@@ -953,8 +954,8 @@ EOF
     else
       __usage
     fi
-    __be_exist "${POOL}/${BEDS}/${2}"
-    if ! __be_mounted "${POOL}/${BEDS}/${2}"
+    __be_exist ${POOL}/${BEDS}/${2}
+    if ! __be_mounted ${POOL}/${BEDS}/${2}
     then
       echo "Boot environment '${2}' is not mounted"
       exit 1
@@ -980,11 +981,29 @@ EOF
       # delete only when it is empty directory
       if [ $( find ${MOUNTPOINT} | head | wc -l | bc ) -eq 1 ]
       then
-        rm -r ${MOUNTPOINT}
+        rm -r "${MOUNTPOINT}"
       fi
     fi
     ;;
 
+  (chroot) # ----------------------------------------------------------
+    if [ ${#} -ne 2 ]
+    then
+      __usage
+    fi
+    __be_exist ${POOL}/${BEDS}/${2}
+    if ! __be_mounted ${POOL}/${BEDS}/${2}
+    then
+      "${0}" mount "${2}" 1> /dev/null 2> /dev/null
+    fi
+    MOUNT=$( mount )
+    MOUNTPOINT=$( echo "${MOUNT}" | grep -m 1 "^${POOL}/${BEDS}/${2} on " | awk '{print $3}' )
+    echo "Entered chroot(8) for '${2}' boot environment"
+    chroot "${MOUNTPOINT}"
+    "${0}" umount -f "${2}" 1> /dev/null 2> /dev/null
+    echo "Leaved from chroot(8) for '${2}' boot environment"
+    ;;
+
   (reroot) # -----------------------------------------------------------------
     # activate new BE which would also set new root filesystem using kenv(1)
     ${0} activate ${2}

beadm.8

@@ -15,7 +15,7 @@
 .\"     @(#)beadm.8
 .\" $FreeBSD$
 .\"
-.Dd December 1, 2020
+.Dd May 6, 2022
 .Dt BEADM 8
 .Os
 .Sh NAME
@@ -52,6 +52,10 @@
 .Nm
 .Cm umount Op Fl f Ar beName
 .Nm
+.Cm chroot Ar beName
+.Nm
+.Cm reroot Ar beName
+.Nm
 .Cm version
 .Sh DESCRIPTION
 The
@@ -165,6 +169,14 @@ This command can be called with either
 .Cm umount
 or
 .Cm unmount .
+.It Cm chroot
+Enter to selected boot environment with the
+.Xr chroot 8
+command.
+.It Cm reroot
+Use 'reroot' feature from the
+.Xr reboot 8 -r
+command.
 .It Cm version
 Print the
 .Nm