/* testsh2.c */
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char** argv) {

	int i = 0;
	for (;i < argc; i++) {
		printf("argv[%d]: %s\n", i, argv[i]);
	}
	exit(0);
}

##</code><code>##

root@aster /tmp# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.8 (Tikanga)
root@aster /tmp# cat /etc/passwd| grep paultest
paultest:x:401:401::/home/paultest:/tmp/testsh2

##</code><code>##

root@aster /tmp# su - paultest
argv[0]: -testsh2
root@aster /tmp# su paultest
argv[0]: testsh2