(mount) Split __linux_fstab_unescape function. Deal with \ at the end of strings.

contrib/mount

@@ -34,6 +34,13 @@ _reply_compgen_array()
     IFS=$oldifs
 }
 
+# Unescape strings in the linux fstab(5) format (with octal escapes).
+__linux_fstab_unescape() {
+    eval $1="'${!1//\'/\047}'"
+    eval $1="'${!1/%\\/\\\\}'"
+    eval "$1=$'${!1}'"
+}
+
 # Complete linux fstab entries.
 #
 # Reads a file from stdin in the linux fstab(5) format; as used by /etc/fstab
@@ -45,11 +52,13 @@ _linux_fstab()
     # Read and unescape values into COMPREPLY
     local fs_spec fs_file fs_other
     while read -r fs_spec fs_file fs_other; do
+        __linux_fstab_unescape fs_spec
+        __linux_fstab_unescape fs_file
         if [[ $fs_spec = [#]* ]]; then continue; fi
         local oldifs="$IFS"
         IFS=$'\0'
-        [[ $fs_spec = */* ]] && eval "COMPREPLY+=( $'${fs_spec//\'/\047}' )";
+        [[ $fs_spec = */* ]] && COMPREPLY+=("$fs_spec");
-        [[ $fs_file = */* ]] && eval "COMPREPLY+=( $'${fs_file//\'/\047}' )";
+        [[ $fs_file = */* ]] && COMPREPLY+=("$fs_file");
         IFS="$oldifs"
     done
 

test/lib/completions/mount.exp

@@ -57,6 +57,23 @@ assert_bash_exec {PATH="$OLDPATH"; unset -v OLDPATH}
 sync_after_int
 
 
+set test "Testing internal __linux_fstab_unescape function for mount"
+# One round of slashes is for bash.
+assert_bash_exec {var=one\'two\\040three\\}
+assert_bash_exec {__linux_fstab_unescape var}
+set cmd {echo $var}
+send "$cmd\r"
+expect {
+    -ex "$cmd\r\none'two three\\" { pass $test }
+#    default { fail $test }
+}
+assert_bash_exec {unset var}
+
+
+sync_after_int
+
+
+# Begin testing through mnt (see setup_dummy_mnt).
 assert_complete {/mnt/nice-test-path} {mnt /mnt/nice-test-p}
 sync_after_int