From: William F. Jolitz Date: Mon, 13 Jul 1992 14:24:35 +0000 (-0800) Subject: 386BSD 0.1 development X-Git-Tag: 386BSD-0.1~26 X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/commitdiff_plain/68ac58269caa682e85c657b886ca3d27ea139457 386BSD 0.1 development Work on file usr/src/sys.386bsd/kern/kern_subr.c Co-Authored-By: Lynne Greer Jolitz Synthesized-from: 386BSD-0.1 --- diff --git a/usr/src/sys.386bsd/kern/kern_subr.c b/usr/src/sys.386bsd/kern/kern_subr.c new file mode 100644 index 0000000000..d887ec2d18 --- /dev/null +++ b/usr/src/sys.386bsd/kern/kern_subr.c @@ -0,0 +1,246 @@ +/* + * Copyright (c) 1982, 1986, 1991 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)kern_subr.c 7.7 (Berkeley) 4/15/91 + */ +static char rcsid[] = "$Header: /usr/bill/working/sys/kern/RCS/kern_subr.c,v 1.3 92/01/21 21:29:28 william Exp $"; + +#include "param.h" +#include "systm.h" +#include "proc.h" + +uiomove(cp, n, uio) + register caddr_t cp; + register int n; + register struct uio *uio; +{ + register struct iovec *iov; + u_int cnt; + int error = 0; + + +#ifdef DIAGNOSTIC + if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE) + panic("uiomove: mode"); + if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) + panic("uiomove proc"); +#endif + while (n > 0 && uio->uio_resid) { + iov = uio->uio_iov; + cnt = iov->iov_len; + if (cnt == 0) { + uio->uio_iov++; + uio->uio_iovcnt--; + continue; + } + if (cnt > n) + cnt = n; + switch (uio->uio_segflg) { + + case UIO_USERSPACE: + case UIO_USERISPACE: + if (uio->uio_rw == UIO_READ) + error = copyout(cp, iov->iov_base, cnt); + else + error = copyin(iov->iov_base, cp, cnt); + if (error) + return (error); + break; + + case UIO_SYSSPACE: + if (uio->uio_rw == UIO_READ) + bcopy((caddr_t)cp, iov->iov_base, cnt); + else + bcopy(iov->iov_base, (caddr_t)cp, cnt); + break; + } + iov->iov_base += cnt; + iov->iov_len -= cnt; + uio->uio_resid -= cnt; + uio->uio_offset += cnt; + cp += cnt; + n -= cnt; + } + return (error); +} + +uioapply(func, arg1, arg2, uio) + int (*func)() ; + register struct uio *uio; +{ + register struct iovec *iov; + u_int cnt, cnt1; + int error = 0; + + +/*#ifdef DIAGNOSTIC*/ + if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE) + panic("uioapply: mode"); + if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc) + panic("uioapply proc"); +/*#endif*/ + while (uio->uio_resid) { + iov = uio->uio_iov; + cnt = iov->iov_len; + if (cnt == 0) { + uio->uio_iov++; + uio->uio_iovcnt--; + continue; + } + cnt1 = cnt; + error = (*func)(arg1, arg2, uio->uio_offset, uio->uio_rw, + iov->iov_base, &cnt1, uio->uio_procp); + cnt -= cnt1; + iov->iov_base += cnt; + iov->iov_len -= cnt; + uio->uio_resid -= cnt; + uio->uio_offset += cnt; + if (error || cnt1) + return (error); + } + return (0); +} + +/* + * Give next character to user as result of read. + */ +ureadc(c, uio) + register int c; + register struct uio *uio; +{ + register struct iovec *iov; + +again: + if (uio->uio_iovcnt == 0) + panic("ureadc"); + iov = uio->uio_iov; + if (iov->iov_len <= 0 || uio->uio_resid <= 0) { + uio->uio_iovcnt--; + uio->uio_iov++; + goto again; + } + switch (uio->uio_segflg) { + + case UIO_USERSPACE: + if (subyte(iov->iov_base, c) < 0) + return (EFAULT); + break; + + case UIO_SYSSPACE: + *iov->iov_base = c; + break; + + case UIO_USERISPACE: + if (suibyte(iov->iov_base, c) < 0) + return (EFAULT); + break; + } + iov->iov_base++; + iov->iov_len--; + uio->uio_resid--; + uio->uio_offset++; + return (0); +} + +strcat(src, append) + register char *src, *append; +{ + + for (; *src; ++src) + ; + while (*src++ = *append++) + ; +} + +strcpy(to, from) + register char *to, *from; +{ + + for (; *to = *from; ++from, ++to) + ; +} + +strncpy(to, from, cnt) + register char *to, *from; + register int cnt; +{ + + for (; cnt && (*to = *from); --cnt, ++from, ++to) + ; + *to = '\0'; +} + +#ifndef lint /* unused except by ct.c, other oddities XXX */ +/* + * Get next character written in by user from uio. + */ +uwritec(uio) + struct uio *uio; +{ + register struct iovec *iov; + register int c; + + if (uio->uio_resid <= 0) + return (-1); +again: + if (uio->uio_iovcnt <= 0) + panic("uwritec"); + iov = uio->uio_iov; + if (iov->iov_len == 0) { + uio->uio_iov++; + if (--uio->uio_iovcnt == 0) + return (-1); + goto again; + } + switch (uio->uio_segflg) { + + case UIO_USERSPACE: + c = fubyte(iov->iov_base); + break; + + case UIO_SYSSPACE: + c = *(u_char *) iov->iov_base; + break; + + case UIO_USERISPACE: + c = fuibyte(iov->iov_base); + break; + } + if (c < 0) + return (-1); + iov->iov_base++; + iov->iov_len--; + uio->uio_resid--; + uio->uio_offset++; + return (c); +} +#endif /* notdef */