Manpage of GETUSERSHELL

GETUSERSHELL

Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
Index
 

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():

    Since glibc 2.21:
        _DEFAULT_SOURCE
    In glibc 2.19 and 2.20:
        _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
    Up to and including glibc 2.19:
        _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/shellsdoes not exist or is unreadable, getusershell() behaves as if /bin/shand /bin/cshwere listed in the file.

The setusershell() function rewinds /etc/shells.

The endusershell() function closes /etc/shells.  

RETURN VALUE

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

FILES

/etc/shells
 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
getusershell(), setusershell(),
endusershell()
Thread safetyMT-Unsafe
 

CONFORMING TO

4.3BSD.  

SEE ALSO

shells(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
FILES
ATTRIBUTES
CONFORMING TO
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 22:27:59 GMT, June 20, 2016