1 /* $OpenBSD: devopen.c,v 1.9 2023/01/16 07:29:35 deraadt 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 int 45 devopen(f, fname, file) 46 struct open_file *f; 47 const char *fname; 48 char **file; /* out */ 49 { 50 register char *cp; 51 register char *ncp; 52 register struct devsw *dp; 53 register int c, i; 54 int ctlr = 0, unit = 0, part = 0; 55 char namebuf[20]; 56 int rc; 57 58 cp = (char *)fname; 59 ncp = namebuf; 60 61 /* look for a string like 'disk(0,0,0)bsd' */ 62 if (strchr(cp, '(')) { 63 while ((c = *cp) != '\0') { 64 if (c == '(') { 65 cp++; 66 break; 67 } 68 if (ncp < namebuf + sizeof(namebuf) - 1) 69 *ncp++ = c; 70 cp++; 71 } 72 73 /* get controller number */ 74 if ((c = *cp) >= '0' && c <= '9') { 75 ctlr = c - '0'; 76 c = *++cp; 77 } 78 79 if (c == ',') { 80 /* get SCSI device number */ 81 if ((c = *++cp) >= '0' && c <= '9') { 82 unit = c - '0'; 83 c = *++cp; 84 } 85 86 if (c == ',') { 87 /* get partition number */ 88 if ((c = *++cp) >= '0' && c <= '9') { 89 part = c - '0'; 90 c = *++cp; 91 } 92 } 93 } 94 if (c != ')') 95 goto defdev; 96 cp++; 97 *ncp = '\0'; 98 } else { 99 defdev: 100 /* No valid device specification */ 101 cp = (char *)fname; 102 ncp = namebuf; 103 dp = devsw; 104 ctlr = unit = part = 0; 105 goto fnd; 106 } 107 108 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 109 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 110 goto fnd; 111 printf("Unknown device '%s'\nKnown devices are:", namebuf); 112 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 113 if (dp->dv_name) 114 printf(" %s", dp->dv_name); 115 printf("\n"); 116 return (ENXIO); 117 118 fnd: 119 rc = (dp->dv_open)(f, ctlr, unit, part); 120 if (rc) 121 return (rc); 122 123 f->f_dev = dp; 124 if (file && *cp != '\0') 125 *file = cp; 126 return (0); 127 } 128