Man page - setusershell(3)

Packages contains this manual

Available languages:

en fr es pl ja ru ro de

Manual

getusershell

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
FILES
ATTRIBUTES
STANDARDS
HISTORY
SEE ALSO

NAME

getusershell, setusershell, endusershell - get permitted user shells

LIBRARY

Standard C library ( libc , -lc )

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/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).

Image grohtml-523704-1.png

STANDARDS

None.

HISTORY

4.3BSD.

SEE ALSO

shells (5)