getpwent() seems to be broken in RedHat 5.2 /sparc,
it will correctly return passwd-entries from both
the /etc/passwd file and the yp database, but it will
return an extra line containing the "+" line from
/etc/passwd, and this crashes finger (and possibly
other programs as well).

The bug is demonstrated by the following program
on my system (SS/2 running 5.2 using yp), look for a line
with "+::0:0:::" in the output.

#include <pwd.h>
#include <sys/types.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
    struct passwd * pwd;

    pwd = getpwent();
    while(pwd != NULL) {
        pwd = getpwent();
        putpwent(pwd,stdout);
    }
    endpwent();
}