getusershell,  setusershell, endusershell - get legal user
       shells


SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);


DESCRIPTION

       The getusershell() function returns the next line from the
       file /etc/shells, opening the file if necessary.  The line
       should contain the pathname of a  valid  user  shell.   If
       /etc/shells  does  not  exist  or  is unreadable, getuser­
       shell() behaves as if  /bin/sh and /bin/csh were listed in
       the file.

       The setusershell() function rewinds /etc/shells.

       The endusershell() function closes /etc/shells.


RETURN VALUE

       The getusershell() function returns a NULL pointer on end-
       of-file.


FILES

       /etc/shells


CONFORMING TO

       BSD 4.3


SEE ALSO

       shells(5)