111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/* $NetBSD: svr4_util.c,v 1.2 1994/10/26 05:28:03 cgd Exp $ */
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/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <compat/svr4/svr4_util.h>
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/* For stackgap allocation */
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caddr_t svr4_edata;
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const char svr4_emul_path[] = "/emul/svr4";
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int
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svr4_emul_find(p, loc, prefix, path, pbuf)
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struct proc *p;
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int loc;
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const char *prefix;
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char *path;
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char **pbuf;
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{
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struct nameidata nd;
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int error;
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char buf[MAXPATHLEN];
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char *ptr;
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size_t sz;
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size_t len;
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*pbuf = path;
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for (ptr = buf; (*ptr = *prefix) != '\0'; ptr++, prefix++)
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continue;
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sz = sizeof(buf) - (ptr - buf);
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if (loc == UIO_SYSSPACE)
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error = copystr(path, ptr, sz, &len);
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else
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error = copyinstr(path, ptr, sz, &len);
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DPRINTF(("looking for %s [%d, %d]: ", buf, sz, len));
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if (*ptr != '/') {
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DPRINTF(("no slash\n"));
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return EINVAL;
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}
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, buf, p);
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if ((error = namei(&nd)) != 0) {
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DPRINTF(("not found\n"));
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return error;
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}
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sz = &ptr[len] - buf;
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if (loc == UIO_SYSSPACE) {
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*pbuf = malloc(sz + 1, M_TEMP, M_WAITOK);
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error = copystr(buf, *pbuf, sz, &len);
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}
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else {
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*pbuf = stackgap_alloc(sz + 1);
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error = copyoutstr(buf, *pbuf, sz, &len);
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}
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DPRINTF((error ? "copy failed\n" : "ok\n"));
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vrele(nd.ni_vp);
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return error;
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}
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