Annotation of sys/arch/alpha/stand/netboot/devopen.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: devopen.c,v 1.4 2003/06/02 23:27:44 millert Exp $ */
! 2: /* $NetBSD: devopen.c,v 1.3 1997/04/06 08:41:25 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: #if 0
! 61: /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */
! 62: if ((c = *cp) >= '0' && c <= '9') {
! 63: ctlr = c - '0';
! 64: /* skip the '/' */
! 65: if (*++cp != '/')
! 66: return (ENXIO);
! 67: cp++;
! 68: while ((c = *cp) != '\0') {
! 69: if (c == '/')
! 70: break;
! 71: if (c >= '0' && c <= '9') {
! 72: /* read unit number */
! 73: unit = c - '0';
! 74:
! 75: /* look for a partition */
! 76: if ((c = *++cp) >= 'a' && c <= 'h') {
! 77: part = c - 'a';
! 78: c = *++cp;
! 79: }
! 80: if (c != '/')
! 81: return (ENXIO);
! 82: break;
! 83: }
! 84: if (ncp < namebuf + sizeof(namebuf) - 1)
! 85: *ncp++ = c;
! 86: cp++;
! 87: }
! 88: *ncp = '\0';
! 89: } else if (strchr(cp, '(')) {
! 90: /* expect a string like 'rz(0,0,0)vmunix' */
! 91: while ((c = *cp) != '\0') {
! 92: if (c == '(') {
! 93: cp++;
! 94: break;
! 95: }
! 96: if (ncp < namebuf + sizeof(namebuf) - 1)
! 97: *ncp++ = c;
! 98: cp++;
! 99: }
! 100:
! 101: /* get controller number */
! 102: if ((c = *cp) >= '0' && c <= '9') {
! 103: ctlr = c - '0';
! 104: c = *++cp;
! 105: }
! 106:
! 107: if (c == ',') {
! 108: /* get SCSI device number */
! 109: if ((c = *++cp) >= '0' && c <= '9') {
! 110: unit = c - '0';
! 111: c = *++cp;
! 112: }
! 113:
! 114: if (c == ',') {
! 115: /* get partition number */
! 116: if ((c = *++cp) >= '0' && c <= '9') {
! 117: part = c - '0';
! 118: c = *++cp;
! 119: }
! 120: }
! 121: }
! 122: if (c != ')')
! 123: return (ENXIO);
! 124: cp++;
! 125: *ncp = '\0';
! 126: } else {
! 127: #endif
! 128: dp = devsw;
! 129: ctlr = unit = part = 0;
! 130: goto fnd;
! 131: #if 0
! 132: }
! 133:
! 134: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
! 135: if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
! 136: goto fnd;
! 137: printf("Unknown device '%s'\nKnown devices are:", namebuf);
! 138: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
! 139: if (dp->dv_name)
! 140: printf(" %s", dp->dv_name);
! 141: printf("\n");
! 142: return (ENXIO);
! 143: #endif
! 144:
! 145: fnd:
! 146: rc = (dp->dv_open)(f, ctlr, unit, part);
! 147: if (rc)
! 148: return (rc);
! 149:
! 150: f->f_dev = dp;
! 151: if (file && *cp != '\0')
! 152: *file = cp;
! 153: return (0);
! 154: }
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