Annotation of sys/arch/alpha/stand/boot/devopen.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: devopen.c,v 1.8 2003/06/02 23:27:44 millert Exp $ */
! 2: /* $NetBSD: devopen.c,v 1.1 1995/11/23 02:39:37 cgd Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to Berkeley by
! 9: * Ralph Campbell.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: *
! 35: * @(#)devopen.c 8.1 (Berkeley) 6/10/93
! 36: */
! 37:
! 38: #include <lib/libsa/stand.h>
! 39:
! 40: /*
! 41: * Decode the string 'fname', open the device and return the remaining
! 42: * file name if any.
! 43: */
! 44: devopen(f, fname, file)
! 45: struct open_file *f;
! 46: const char *fname;
! 47: char **file; /* out */
! 48: {
! 49: register char *cp;
! 50: register char *ncp;
! 51: register struct devsw *dp;
! 52: register int c, i;
! 53: int ctlr = 0, unit = 0, part = 0;
! 54: char namebuf[20];
! 55: int rc;
! 56:
! 57: cp = (char *)fname;
! 58: ncp = namebuf;
! 59:
! 60: /* look for a string like 'disk(0,0,0)bsd' */
! 61: if (strchr(cp, '(')) {
! 62: while ((c = *cp) != '\0') {
! 63: if (c == '(') {
! 64: cp++;
! 65: break;
! 66: }
! 67: if (ncp < namebuf + sizeof(namebuf) - 1)
! 68: *ncp++ = c;
! 69: cp++;
! 70: }
! 71:
! 72: /* get controller number */
! 73: if ((c = *cp) >= '0' && c <= '9') {
! 74: ctlr = c - '0';
! 75: c = *++cp;
! 76: }
! 77:
! 78: if (c == ',') {
! 79: /* get SCSI device number */
! 80: if ((c = *++cp) >= '0' && c <= '9') {
! 81: unit = c - '0';
! 82: c = *++cp;
! 83: }
! 84:
! 85: if (c == ',') {
! 86: /* get partition number */
! 87: if ((c = *++cp) >= '0' && c <= '9') {
! 88: part = c - '0';
! 89: c = *++cp;
! 90: }
! 91: }
! 92: }
! 93: if (c != ')')
! 94: goto defdev;
! 95: cp++;
! 96: *ncp = '\0';
! 97: } else {
! 98: defdev:
! 99: /* No valid device specification */
! 100: cp = (char *)fname;
! 101: ncp = namebuf;
! 102: dp = devsw;
! 103: ctlr = unit = part = 0;
! 104: goto fnd;
! 105: }
! 106:
! 107: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
! 108: if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
! 109: goto fnd;
! 110: printf("Unknown device '%s'\nKnown devices are:", namebuf);
! 111: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
! 112: if (dp->dv_name)
! 113: printf(" %s", dp->dv_name);
! 114: printf("\n");
! 115: return (ENXIO);
! 116:
! 117: fnd:
! 118: rc = (dp->dv_open)(f, ctlr, unit, part);
! 119: if (rc)
! 120: return (rc);
! 121:
! 122: f->f_dev = dp;
! 123: if (file && *cp != '\0')
! 124: *file = cp;
! 125: return (0);
! 126: }
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