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RedHat 9 (Linux i386) - man page for setusershell (redhat section 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)


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