Linux.com

getusershell.3

GETUSERSHELL

Section: Linux Programmer's Manual (3)
Updated: 2007-07-26
Index Return to Main Contents
 

NAME

getusershell, setusershell, endusershell - get permitted user shells  

SYNOPSIS

#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

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

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

FILES

/etc/shells
 

CONFORMING TO

4.3BSD.  

SEE ALSO

shells(5)  

COLOPHON

This page is part of release 3.21 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/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
FILES
CONFORMING TO
SEE ALSO
COLOPHON

 

Comments

Subscribe to Comments Feed

Upcoming Linux Foundation Courses

  1. LFS426 Linux Performance Tuning
    08 Sep » 11 Sep - New York
    Details
  2. LFS520 OpenStack Cloud Architecture and Deployment
    08 Sep » 11 Sep - Virtual
    Details
  3. LFD320 Linux Kernel Internals and Debugging
    15 Sep » 19 Sep - Virtual
    Details

View All Upcoming Courses

Become an Individual Member
Check out the Friday Funnies

Sign Up For the Linux.com Newsletter


Who we are ?

The Linux Foundation is a non-profit consortium dedicated to the growth of Linux.

More About the foundation...

Frequent Questions

Join / Linux Training / Board