/* $NetBSD: devopen.c,v 1.3 2006/04/05 21:30:29 bjh21 Exp $ */ /*- * Copyright (c) 2001, 2006 Ben Harris * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include #include #include #include int devopen(struct open_file *f, const char *fname, char **file) { #ifdef LIBSA_SINGLE_FILESYSTEM /* We don't support any devices yet. */ f->f_flags |= F_NODEV; *file = (char *)fname; return 0; #else char *p, *fsname; int part, drive, err, fslen; p = strchr(fname, ':'); if (p == NULL || p == fname) return ENOENT; *file = p + 1; p--; if (p == fname) return ENOENT; if (islower((unsigned char)*p)) part = *p-- - 'a'; else part = RAW_PART; if (p == fname) return ENOENT; drive = 0; while (isdigit((unsigned char)*p) && p >= fname) drive = drive * 10 + *p-- - '0'; if (p <= fname) return ENOENT; fslen = p + 1 - fname; fsname = alloc(fslen + 1); memcpy(fsname, fname, fslen); fsname[fslen] = 0; err = rodisk_open(f, fsname, drive, part); dealloc(fsname, fslen + 1); return err; #endif }