1Function: externstr 2Section: programming/specific 3C-Name: externstr 4Prototype: s 5Help: externstr(str): execute shell command str, and returns the result as a 6 vector of GP strings, one component per output line. 7Doc: the string \var{str} is the name of an external command (i.e.~one you 8 would type from your UNIX shell prompt). This command is immediately run and 9 its output is returned as a vector of GP strings, one component per output 10 line. 11