/* $NetBSD: kmem.c,v 1.1.1.1 1999/12/11 22:23:59 veego Exp $ */ /* * Copyright (C) 1993-1998 by Darren Reed. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and due credit is given * to the original author and the contributors. */ /* * kmemcpy() - copies n bytes from kernel memory into user buffer. * returns 0 on success, -1 on error. */ #include #include #include #include #include #include #include "kmem.h" #if !defined(lint) static const char sccsid[] = "@(#)kmem.c 1.4 1/12/96 (C) 1992 Darren Reed"; static const char rcsid[] = "@(#)Id: kmem.c,v 2.1 1999/08/04 17:30:09 darrenr Exp"; #endif static int kmemfd = -1; int openkmem() { if ((kmemfd = open(KMEM,O_RDONLY)) == -1) { perror("kmeminit:open"); return -1; } return kmemfd; } int kmemcpy(buf, pos, n) register char *buf; long pos; register int n; { register int r; if (!n) return 0; if (kmemfd == -1) if (openkmem() == -1) return -1; if (lseek(kmemfd, pos, 0) == -1) { perror("kmemcpy:lseek"); return -1; } while ((r = read(kmemfd, buf, n)) < n) if (r <= 0) { perror("kmemcpy:read"); return -1; } else { buf += r; n -= r; } return 0; } int kstrncpy(buf, pos, n) register char *buf; long pos; register int n; { register int r; if (!n) return 0; if (kmemfd == -1) if (openkmem() == -1) return -1; if (lseek(kmemfd, pos, 0) == -1) { perror("kmemcpy:lseek"); return -1; } while (n > 0) { r = read(kmemfd, buf, 1); if (r <= 0) { perror("kmemcpy:read"); return -1; } else { if (*buf == '\0') break; buf++; n--; } } return 0; }