GETPW(3) BSD Programmer's Manual GETPW(3)
getpw - get name from uid
getpw(uid, char *buf);
The getpw function is made obsolete by getpwuid(3).
It is available from the compatibility library, libcompat.
The getpw() function reads the file /etc/passwd, and if it finds the
specified uid, copies the password entry line into the string pointed to
by buf. the null terminated entry line from the password database, and
appends the NUL character.
The getpw() function returns the zero if successful, otherwise a non-zero
if the entry does not exist.
A getpw() function appeared in Version 6 AT&T UNIX.
4.4BSD June 4, 1993 1