compatibility fixes for older bash versions

archive_xlog.bash

@@ -225,7 +225,7 @@ if [ "$ARCHIVE_LOCAL" = "yes" ]; then
     fi
 else
     # Compress and copy with rsync
-    [[ $ARCHIVE_HOST == *([^][]):*([^][]) ]] && ARCHIVE_HOST="[${ARCHIVE_HOST}]" # Dummy test for IPv6
+    echo $ARCHIVE_HOST | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && ARCHIVE_HOST="[${ARCHIVE_HOST}]" # Dummy test for IPv6
 
     dest_host=${ARCHIVE_USER:+$ARCHIVE_USER@}${ARCHIVE_HOST}
 

backup_pitr.bash

@@ -163,7 +163,7 @@ fi
 current_time=`date +%Y.%m.%d-%H.%M.%S`
 
 # scp needs IPv6 between brackets
-[[ $target == *([^][]):*([^][]) ]] && target="[${target}]"
+echo $target | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && target="[${target}]"
 ssh_target=${ssh_user:+$ssh_user@}$target
 
 # Ensure failed globs will be empty, not left containing the literal glob pattern
@@ -477,9 +477,11 @@ case $storage in
 	    if [ -n "$prev_backup" ]; then
 	    	# Link previous backup of the tablespace
 		if [ "$local_backup" = "yes" ]; then
-		    rsync_link=( '--link-dest' "$prev_backup/tblspc/$_name" )
+		    [ -d "$prev_backup/tblspc/$_name" ] && rsync_link=( '--link-dest' "$prev_backup/tblspc/$_name" )
 		else
-		    rsync_link=( '--link-dest' "$(qw "$prev_backup/tblspc/$_name")" )
+                    if ssh -n -- "$ssh_target" "test -d $(qw "$prev_backup/tblspc/$_name")" 2>/dev/null; then
+		        rsync_link=( '--link-dest' "$(qw "$prev_backup/tblspc/$_name")" )
+                    fi
 		fi
 	    fi
 

configure_pitr.bash

@@ -135,8 +135,8 @@ fi
 
 # Parse the target into user, host and path, deduce if backup is local
 backup_user="$(echo $target | grep '@' | cut -d'@' -f1 )"
-backup_host="$(echo $target | grep ':' | sed -Ee 's/(.*):(.*)/\1/' | cut -d'@' -f2 )"
-backup_dir="$(echo $target | sed -Ee 's/(.*):(.*)/\2/')"
+backup_host="$(echo $target | grep ':' | sed -re 's/(.*):(.*)/\1/' | cut -d'@' -f2 )"
+backup_dir="$(echo $target | sed -re 's/(.*):(.*)/\2/')"
 if [ -z "$backup_host" ]; then
     backup_local="yes"
 else
@@ -148,8 +148,8 @@ fi
 # Parse archive target the same way
 if [ -n "$archive_target" ]; then
     archive_user="$(echo $archive_target | grep '@' | cut -d'@' -f1 )"
-    archive_host="$(echo $archive_target | grep ':' | sed -Ee 's/(.*):(.*)/\1/' | cut -d'@' -f2 )"
-    archive_dir="$(echo $archive_target | sed -Ee 's/(.*):(.*)/\2/')"
+    archive_host="$(echo $archive_target | grep ':' | sed -re 's/(.*):(.*)/\1/' | cut -d'@' -f2 )"
+    archive_dir="$(echo $archive_target | sed -re 's/(.*):(.*)/\2/')"
     if [ -z "$archive_host" ]; then
 	archive_local="yes"
     else

list_pitr.bash

@@ -89,7 +89,7 @@ if [ -n "$host" ] && [ "$local_backup" = "yes" ]; then
     error "BACKUP_HOST and BACKUP_IS_LOCAL are set, it can't be both"
 fi
 
-[[ $host == *([^][]):*([^][]) ]] && host="[${host}]"
+echo $host | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && host="[${host}]"
 ssh_target=${ssh_user:+$ssh_user@}$host
 
 

purge_pitr.bash

@@ -135,8 +135,8 @@ fi
 
 
 # Prepare the IPv6 address for use with SSH
-[[ $target == *([^][]):*([^][]) ]] && target="[${target}]"
-[[ $xlog_host == *([^][]):*([^][]) ]] && xlog_host="[${xlog_host}]"
+echo $target | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && target="[${target}]"
+echo $xlog_host | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && xlog_host="[${xlog_host}]"
 ssh_target=${ssh_user:+$ssh_user@}$target
 xlog_ssh_target=${xlog_ssh_user:+$xlog_ssh_user@}$xlog_host
 

restore_pitr.bash

@@ -199,7 +199,7 @@ if [ -n "$source" ] && [ "$local_backup" = "yes" ]; then
     error "BACKUP_HOST and BACKUP_IS_LOCAL are set, it can't be both"
 fi
 
-[[ $source == *([^][]):*([^][]) ]] && source="[${source}]"
+echo $source | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && source="[${source}]"
 ssh_target=${ssh_user:+$ssh_user@}$source
 
 # Ensure failed globs will be empty, not left containing the literal glob pattern
@@ -336,13 +336,13 @@ info "  PGDATA -> $pgdata"
 
 [ -n "$pgxlog" ] && info "  PGDATA/pg_xlog -> $pgxlog"
 
-# Populate an associative array with the tablespace directory names.
-# We'll use this to check if any of them appear more than once after relocations are applied.
-declare -A tspc_dedup
+# Populate an array with tablespace directory to check we have duplicates
+declare -a tspc_dedup
 
+# Print the tablespace relocation information
 for (( i=0; i<$tspc_count; ++i )); do
     info "  tablespace \"${tspc_name[$i]}\" (${tspc_oid[$i]}) -> ${tspc_dir[$i]} (relocated: ${tspc_reloc[$i]})"
-    tspc_dedup[${tspc_dir[$i]}]=1
+    tspc_dedup+=( ${tspc_dir[$i]} )
 done
 
 info
@@ -353,7 +353,7 @@ info "  restore_command = '$restore_command'"
 info 
 
 # Check if tablespace relocation list have duplicates
-if (( ${#tspc_dedup[@]} < $tspc_count )); then
+if (( $(for o in "${tspc_dedup[@]}"; do echo $o; done | sort -u | wc -l) < $tspc_count )); then
     error "found duplicates in tablespace relocations. Check options and the list of tablespaces of the backup"
 fi
 

restore_xlog.bash

@@ -191,7 +191,7 @@ if [ "$ARCHIVE_LOCAL" = "yes" ]; then
     fi
 else
     # check if we have a IPv6, and put brackets for scp
-    [[ $ARCHIVE_HOST == *([^][]):*([^][]) ]] && ARCHIVE_HOST="[${ARCHIVE_HOST}]"
+    echo $ARCHIVE_HOST | grep -qi '^[0123456789abcdef:]*:[0123456789abcdef:]*$' && ARCHIVE_HOST="[${ARCHIVE_HOST}]"
 
     if ! scp -- "${ARCHIVE_USER:+$ARCHIVE_USER@}$ARCHIVE_HOST:$(qw "$ARCHIVE_DIR/$xlog_file")" "$target_file" >/dev/null; then
 	error "could not copy $ARCHIVE_HOST:$ARCHIVE_DIR/$xlog_file to $target_file"