# strstr() -- locate a substring
# Usage: strstsr string match
#
# Example 1:
#
# string="saya suka makan";
# if strstr "${string}" "suk"; then
# 	echo "OK";
# fi
#
# Example 2:
#
# buff="$(ps ax)";
# if ! strstr "${buff}" "httpd"; then
#	echo "service httpd down";
# fi

strstr() {
	[ $# -eq 2 ] || return 1;
	[ "$1" = "$2" ] || [[ "$1" = *$2* ]] && return 0;
	return 1;
}