NAME
getusershell,
setusershell, endusershell
— get valid user
shells
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<unistd.h>
char *
getusershell(void);
void
setusershell(void);
void
endusershell(void);
DESCRIPTION
The
getusershell()
function returns a pointer to a valid user shell as defined by the system
manager in the shells database as described in
shells(5).
If the shells database is not available,
getusershell() behaves as if
/bin/sh and /bin/csh were
listed.
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 (0) 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.