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 4.3BSD

SEE ALSO shells(5)

BSD 1993-07-04 GETUSERSHELL(3)