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GETUSERSHELL

Linux Programmer's Manual (3)
2013-06-21
 

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 NULL on end-of-file.  

FILES

/etc/shells
 

ATTRIBUTES

 

Multithreading (see pthreads(7))

The getusershell(), setusershell() and endusershell() functions are not thread-safe.  

CONFORMING TO

4.3BSD.  

SEE ALSO

shells(5)  

COLOPHON

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Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
FILES
ATTRIBUTES
Multithreading (see pthreads(7))
CONFORMING TO
SEE ALSO
COLOPHON

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Time: 21:43:00 GMT, July 12, 2014