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CentOS 7.0 - man page for getusershell (centos section 3)

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

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
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 informa- tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
GNU
2013-06-21 GETUSERSHELL(3)


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