Download Panoramio pictures via user id

panoramio.sh

#!/bin/sh

delay=0
timeout=10
retry=2

usage()
{
	echo "Usage: `basename $0` userid"
	exit 1
}

[ $# -ne 1 ] && usage

global_index=1
page=1
while true ; do
	echo "[INFO] Processing page $page"
	wget -q -O .tmp http://www.panoramio.com/user/$1?photo_page=$page
	if [ $? -ne 0 ] ; then
		echo "[WARNING] Can not get content of page $page"
		break
	fi

	if [ -z "$total" ] ; then
		total=`grep -iE '<a href="\/user\/.*\/stats' .tmp | head -n 1 | sed 's/.*stats">//;s/<.*//'`
	fi
	imgs=`grep -ioE '<a href="\/photo\/[0-9]*"$' .tmp | sed 's/.*\///;s/"//'`
	alts=`grep -ioE '^              >..*<\/a>$' .tmp | sed 's/<.*//;s/.*>//'`

	index=1
	for img in $imgs ; do
		url=http://static.panoramio.com/photos/original/$img.jpg
		alt=`{ for alt in $alts ; do echo $alt ; done } | head -n $index | tail -n 1`
		file=`echo $global_index | awk '{printf "%03d", $0}'`_$alt.jpg
		index=$((index+1))
		global_index=$((global_index+1))

		if [ -f $file ] ; then
			continue
		fi

		echo "[INFO] Downloading $url"
		wget -q --tries=$retry --timeout=$timeout -O "$file" "$url"
		if [ $? -ne 0 ] ; then
			rm -f "$file"
			echo "[WARNING] Failed to download $url to $file"
		fi
		sleep $delay
	done

	if [ $global_index -gt $total ] ; then
		break
	fi	

	page=$((page+1))
done

rm -f .tmp

exit 0

Thanks.. Very useful right now that they have disabled the API.
I'm using this on Win 10 Ubuntu Bash, and everything works.

The problem is though, the script can't properly name the files

@elyobelyob I tried this line

alts=grep -ioE '^ >..*<\/a>$' .tmp | sed -e 's/[^A-Za-z0-9._-]/_/g'

But instead of the original naming, it names files just with numbers and no text