NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | FILES | CONFORMING TO | SEE ALSO | COLOPHON

The Linux Programming Interface

GETUSERSHELL(3)               Linux Programmer's Manual               GETUSERSHELL(3)

NAME         top

       getusershell, setusershell, endusershell - get permitted user shells

SYNOPSIS         top

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       getusershell(), setusershell(), endusershell():
           _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

DESCRIPTION         top

       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,
       getusershell() 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         top

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

FILES         top

       /etc/shells

CONFORMING TO         top

       4.3BSD.

SEE ALSO         top

       shells(5)

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

GNU                                   2007-07-26                      GETUSERSHELL(3)

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