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 a pointer to a legal user shell as defined by the system
manager in the file /etc/shells. If
/etc/shells is unreadable or does not exist,
getusershell() behaves as if only
/bin/sh, /bin/csh and
/bin/ksh were listed in the file.
The
getusershell()
function reads the next line (opening the file if necessary);
setusershell()
rewinds the file;
endusershell()
closes it.
FILES
- /etc/shells
DIAGNOSTICS
The routine getusershell() returns a null
pointer on EOF.
SEE ALSO
HISTORY
The getusershell() function appeared in
4.3BSD.
BUGS
The getusershell() function leaves its
result in an internal static object and returns a pointer to that object.
Subsequent calls to getusershell() will modify the
same object.