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Linux man pages : getusershell (3)
GETUSERSHELL(3)		   Linux Programmer's Manual	       GETUSERSHELL(3)

NAME

getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void);

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

CONFORMING TO

BSD 4.3

SEE ALSO

shells(5) BSD 1993-07-04 GETUSERSHELL(3)