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():

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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