GETUSERSHELL(3) | Linux Programmer's Manual | GETUSERSHELL(3) |
NAME
getusershell, setusershell, endusershell - get permitted user shellsSYNOPSIS
#include<unistd.h>
*getusershell(void);
setusershell(void);
endusershell(void);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_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
ATTRIBUTES
Multithreading (see pthreads(7))
The getusershell(), setusershell() and endusershell() functions are not thread-safe.CONFORMING TO
4.3BSD.SEE ALSO
shells(5)COLOPHON
This page is part of release 3.53 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/.2013-06-21 | GNU |