GETUSERSHELL
Updated: 2015-03-02
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NAME
getusershell, setusershell, endusershell - get permitted user shellsSYNOPSIS
#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
For an explanation of the terms used in this section, see attributes(7).Interface | Attribute | Value |
getusershell(),
setusershell(),
endusershell() | Thread safety | MT-Unsafe |
CONFORMING TO
4.3BSD.SEE ALSO
shells(5)COLOPHON
This page is part of release 4.02 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUE
- FILES
- ATTRIBUTES
- CONFORMING TO
- SEE ALSO
- COLOPHON