1 /* $NetBSD: devopen.c,v 1.3 1999/06/28 01:20:44 sakamoto Exp $ */ 2 3 /*- 4 * Copyright (c) 1993 John Brezak 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <stand.h> 32 #include <sys/param.h> 33 #include <sys/reboot.h> 34 35 #define ispart(c) ((c) >= 'a' && (c) <= 'h') 36 37 int 38 atoi(cp) 39 char *cp; 40 { 41 int val = 0; 42 43 while (isdigit(*cp)) 44 val = val * 10 + (*cp++ - '0'); 45 return (val); 46 } 47 48 int 49 devlookup(d) 50 char *d; 51 { 52 struct devsw *dp = devsw; 53 int i; 54 55 for (i = 0; i < ndevs; i++, dp++) 56 if (dp->dv_name && strcmp(dp->dv_name, d) == 0) 57 return (i); 58 59 printf("No such device - Configured devices are:\n"); 60 for (dp = devsw, i = 0; i < ndevs; i++, dp++) 61 if (dp->dv_name) 62 printf(" %s", dp->dv_name); 63 printf("\n"); 64 return (-1); 65 } 66 67 /* 68 * Parse a device spec in one of two forms. 69 * dev(ctlr, unit, part)file 70 */ 71 int 72 devparse(fname, dev, adapt, ctlr, unit, part, file) 73 const char *fname; 74 int *dev; 75 int *adapt; 76 int *ctlr; 77 int *unit; 78 int *part; 79 char **file; 80 { 81 int argc, flag; 82 char *s, *args[3]; 83 extern char nametmp[]; 84 85 /* get device name and make lower case */ 86 strcpy(nametmp, (char *)fname); 87 for (s = nametmp; *s && *s != '('; s++) 88 if (isupper(*s)) *s = tolower(*s); 89 90 if (*s == '(') { 91 /* lookup device and get index */ 92 *s = NULL; 93 if ((*dev = devlookup(nametmp, s - nametmp)) < 0) 94 goto baddev; 95 96 /* tokenize device ident */ 97 for (++s, flag = 0, argc = 0; *s && *s != ')'; s++) { 98 if (*s != ',') { 99 if (!flag) { 100 flag++; 101 args[argc++] = s; 102 } 103 } else { 104 if (flag) { 105 *s = NULL; 106 flag = 0; 107 } 108 } 109 } 110 if (*s == ')') 111 *s = NULL; 112 113 switch (argc) { 114 case 3: 115 *part = atoi(args[2]); 116 /* FALL THROUGH */ 117 case 2: 118 *unit = atoi(args[1]); 119 /* FALL THROUGH */ 120 case 1: 121 *ctlr = atoi(args[0]); 122 break; 123 } 124 *file = ++s; 125 } else { 126 /* no device present */ 127 *file = (char *)fname; 128 } 129 return (0); 130 131 baddev: 132 return (EINVAL); 133 } 134 135 int 136 devopen(f, fname, file) 137 struct open_file *f; 138 const char *fname; 139 char **file; 140 { 141 int error; 142 int dev = 0, ctlr = 0, unit = 0, part = 0; 143 int adapt = 0; 144 struct devsw *dp = &devsw[0]; 145 146 if ((error = 147 devparse(fname, &dev, &adapt, &ctlr, &unit, &part, file)) != 0) 148 return (error); 149 150 dp = &devsw[dev]; 151 if (!dp->dv_open) 152 return (ENODEV); 153 154 f->f_dev = dp; 155 if ((error = (*dp->dv_open)(f, ctlr, unit, part)) == 0) 156 return (0); 157 158 printf("%s(%d,%d,%d): %s\n", devsw[dev].dv_name, 159 ctlr, unit, part, strerror(error)); 160 161 return (error); 162 } 163