GETUSERSHELL(3)            Library Functions Manual            GETUSERSHELL(3)

NAME
     getusershell, setusershell, endusershell – get valid user shells

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     char *
     getusershell(void);

     void
     setusershell(void);

     void
     endusershell(void);

DESCRIPTION
     The getusershell() function returns a pointer to a valid user shell as
     defined by the system manager in the shells database as described in
     shells(5).  If the shells database is not available, getusershell()
     behaves as if /bin/sh and /bin/csh were listed.

     The getusershell() function reads the next line (opening the file if
     necessary); setusershell() rewinds the file; endusershell() closes it.

FILES
     /etc/shells

DIAGNOSTICS
     The routine getusershell() returns a null pointer (0) on EOF.

SEE ALSO
     shells(5)

HISTORY
     The getusershell() function appeared in 4.3BSD.

BUGS
     The getusershell() function leaves its result in an internal static
     object and returns a pointer to that object.  Subsequent calls to
     getusershell() will modify the same object.

macOS 15.2                     January 16, 1999                     macOS 15.2