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
nsswitch.conf(5),
shells(5)
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.