80cc38a1af
between creation of a file descriptor and close(2) when using kernel assisted threads. What we do is stick descriptors in the table, but mark them as "larval". This causes essentially everything to treat it as a non-existent descriptor, except for fdalloc(), which sees a filled slot so that it won't (incorrectly) allocate it again. When a descriptor is fully constructed, the code that has constructed it marks it as "mature" (which actually clears the "larval" flag), and things continue to work as normal. While here, gather all the code that gets a descriptor from the table into a fd_getfile() function, and call it, rather than having the same (sometimes incorrect) code copied all over the place.
159 lines
4.4 KiB
C
159 lines
4.4 KiB
C
/* $NetBSD: svr4_ioctl.c,v 1.21 2001/06/14 20:32:45 thorpej Exp $ */
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/*-
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* Copyright (c) 1994 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/termios.h>
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#include <sys/tty.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <net/if.h>
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#include <sys/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_lwp.h>
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#include <compat/svr4/svr4_ucontext.h>
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#include <compat/svr4/svr4_syscallargs.h>
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#include <compat/svr4/svr4_stropts.h>
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#include <compat/svr4/svr4_ioctl.h>
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#include <compat/svr4/svr4_termios.h>
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#include <compat/svr4/svr4_ttold.h>
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#include <compat/svr4/svr4_filio.h>
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#include <compat/svr4/svr4_sockio.h>
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#ifdef DEBUG_SVR4
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static void svr4_decode_cmd __P((u_long, char *, char *, int *, int *));
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/*
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* Decode an ioctl command symbolically
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*/
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static void
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svr4_decode_cmd(cmd, dir, c, num, argsiz)
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u_long cmd;
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char *dir, *c;
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int *num, *argsiz;
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{
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if (cmd & SVR4_IOC_VOID)
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*dir++ = 'V';
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if (cmd & SVR4_IOC_IN)
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*dir++ = 'R';
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if (cmd & SVR4_IOC_OUT)
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*dir++ = 'W';
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*dir = '\0';
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if (cmd & SVR4_IOC_INOUT)
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*argsiz = (cmd >> 16) & 0xff;
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else
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*argsiz = -1;
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*c = (cmd >> 8) & 0xff;
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*num = cmd & 0xff;
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}
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#endif
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int
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svr4_sys_ioctl(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_ioctl_args *uap = v;
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struct file *fp;
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struct filedesc *fdp;
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u_long cmd;
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int (*fun) __P((struct file *, struct proc *, register_t *,
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int, u_long, caddr_t));
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#ifdef DEBUG_SVR4
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char dir[4];
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char c;
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int num;
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int argsiz;
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svr4_decode_cmd(SCARG(uap, com), dir, &c, &num, &argsiz);
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uprintf("svr4_ioctl(%d, _IO%s(%c, %d, %d), %p);\n", SCARG(uap, fd),
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dir, c, num, argsiz, SCARG(uap, data));
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#endif
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fdp = p->p_fd;
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cmd = SCARG(uap, com);
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if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
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return EBADF;
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if ((fp->f_flag & (FREAD | FWRITE)) == 0)
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return EBADF;
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switch (cmd & 0xff00) {
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case SVR4_tIOC:
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fun = svr4_ttold_ioctl;
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break;
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case SVR4_TIOC:
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fun = svr4_term_ioctl;
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break;
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case SVR4_STR:
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fun = svr4_stream_ioctl;
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break;
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case SVR4_FIOC:
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fun = svr4_fil_ioctl;
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break;
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case SVR4_SIOC:
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fun = svr4_sock_ioctl;
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break;
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case SVR4_XIOC:
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/* We do not support those */
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return EINVAL;
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default:
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DPRINTF(("Unimplemented ioctl %lx\n", cmd));
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return 0; /* XXX: really ENOSYS */
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}
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return (*fun)(fp, p, retval, SCARG(uap, fd), cmd, SCARG(uap, data));
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}
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