| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #ifndef lint |
| 35 | static char sccsid[] = "@(#)mkswapconf.c 5.10 (Berkeley) 7/1/91"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | /* |
| 39 | * Build a swap configuration file. |
| 40 | */ |
| 41 | #include "config.h" |
| 42 | |
| 43 | #include <stdio.h> |
| 44 | #include <ctype.h> |
| 45 | |
| 46 | swapconf() |
| 47 | { |
| 48 | register struct file_list *fl; |
| 49 | struct file_list *do_swap(); |
| 50 | |
| 51 | fl = conf_list; |
| 52 | while (fl) { |
| 53 | if (fl->f_type != SYSTEMSPEC) { |
| 54 | fl = fl->f_next; |
| 55 | continue; |
| 56 | } |
| 57 | fl = do_swap(fl); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | struct file_list * |
| 62 | do_swap(fl) |
| 63 | register struct file_list *fl; |
| 64 | { |
| 65 | FILE *fp; |
| 66 | char swapname[80]; |
| 67 | register struct file_list *swap; |
| 68 | dev_t dev; |
| 69 | |
| 70 | if (eq(fl->f_fn, "generic")) { |
| 71 | fl = fl->f_next; |
| 72 | return (fl->f_next); |
| 73 | } |
| 74 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); |
| 75 | fp = fopen(path(swapname), "w"); |
| 76 | if (fp == 0) { |
| 77 | perror(path(swapname)); |
| 78 | exit(1); |
| 79 | } |
| 80 | fprintf(fp, "#include \"sys/param.h\"\n"); |
| 81 | fprintf(fp, "#include \"sys/conf.h\"\n"); |
| 82 | fprintf(fp, "\n"); |
| 83 | /* |
| 84 | * If there aren't any swap devices |
| 85 | * specified, just return, the error |
| 86 | * has already been noted. |
| 87 | */ |
| 88 | swap = fl->f_next; |
| 89 | if (swap == 0 || swap->f_type != SWAPSPEC) { |
| 90 | (void) unlink(path(swapname)); |
| 91 | fclose(fp); |
| 92 | return (swap); |
| 93 | } |
| 94 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", |
| 95 | major(fl->f_rootdev), minor(fl->f_rootdev)); |
| 96 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", |
| 97 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); |
| 98 | fprintf(fp, "\n"); |
| 99 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); |
| 100 | do { |
| 101 | dev = swap->f_swapdev; |
| 102 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", |
| 103 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); |
| 104 | swap = swap->f_next; |
| 105 | } while (swap && swap->f_type == SWAPSPEC); |
| 106 | fprintf(fp, "\t{ 0, 0, 0 }\n"); |
| 107 | fprintf(fp, "};\n"); |
| 108 | fclose(fp); |
| 109 | return (swap); |
| 110 | } |
| 111 | |
| 112 | static int devtablenotread = 1; |
| 113 | static struct devdescription { |
| 114 | char *dev_name; |
| 115 | int dev_major; |
| 116 | struct devdescription *dev_next; |
| 117 | } *devtable; |
| 118 | |
| 119 | /* |
| 120 | * Given a device name specification figure out: |
| 121 | * major device number |
| 122 | * partition |
| 123 | * device name |
| 124 | * unit number |
| 125 | * This is a hack, but the system still thinks in |
| 126 | * terms of major/minor instead of string names. |
| 127 | */ |
| 128 | dev_t |
| 129 | nametodev(name, defunit, defpartition) |
| 130 | char *name; |
| 131 | int defunit; |
| 132 | char defpartition; |
| 133 | { |
| 134 | char *cp, partition; |
| 135 | int unit; |
| 136 | register struct devdescription *dp; |
| 137 | |
| 138 | cp = name; |
| 139 | if (cp == 0) { |
| 140 | fprintf(stderr, "config: internal error, nametodev\n"); |
| 141 | exit(1); |
| 142 | } |
| 143 | while (*cp && !isdigit(*cp)) |
| 144 | cp++; |
| 145 | unit = *cp ? atoi(cp) : defunit; |
| 146 | if (unit < 0 || unit > 31) { |
| 147 | fprintf(stderr, |
| 148 | "config: %s: invalid device specification, unit out of range\n", name); |
| 149 | unit = defunit; /* carry on more checking */ |
| 150 | } |
| 151 | if (*cp) { |
| 152 | *cp++ = '\0'; |
| 153 | while (*cp && isdigit(*cp)) |
| 154 | cp++; |
| 155 | } |
| 156 | partition = *cp ? *cp : defpartition; |
| 157 | if (partition < 'a' || partition > 'h') { |
| 158 | fprintf(stderr, |
| 159 | "config: %c: invalid device specification, bad partition\n", *cp); |
| 160 | partition = defpartition; /* carry on */ |
| 161 | } |
| 162 | if (devtablenotread) |
| 163 | initdevtable(); |
| 164 | for (dp = devtable; dp; dp = dp->dev_next) |
| 165 | if (eq(name, dp->dev_name)) |
| 166 | break; |
| 167 | if (dp == 0) { |
| 168 | fprintf(stderr, "config: %s: unknown device\n", name); |
| 169 | return (NODEV); |
| 170 | } |
| 171 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); |
| 172 | } |
| 173 | |
| 174 | char * |
| 175 | devtoname(dev) |
| 176 | dev_t dev; |
| 177 | { |
| 178 | char buf[80]; |
| 179 | register struct devdescription *dp; |
| 180 | |
| 181 | if (devtablenotread) |
| 182 | initdevtable(); |
| 183 | for (dp = devtable; dp; dp = dp->dev_next) |
| 184 | if (major(dev) == dp->dev_major) |
| 185 | break; |
| 186 | if (dp == 0) |
| 187 | dp = devtable; |
| 188 | (void) sprintf(buf, "%s%d%c", dp->dev_name, |
| 189 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); |
| 190 | return (ns(buf)); |
| 191 | } |
| 192 | |
| 193 | initdevtable() |
| 194 | { |
| 195 | char linebuf[256]; |
| 196 | char buf[BUFSIZ]; |
| 197 | int maj; |
| 198 | register struct devdescription **dp = &devtable; |
| 199 | FILE *fp; |
| 200 | |
| 201 | (void) sprintf(buf, "../conf/devices.%s", machinename); |
| 202 | fp = fopen(buf, "r"); |
| 203 | if (fp == NULL) { |
| 204 | fprintf(stderr, "config: can't open %s\n", buf); |
| 205 | exit(1); |
| 206 | } |
| 207 | while(fgets(linebuf,256,fp)) |
| 208 | { |
| 209 | /*******************************\ |
| 210 | * Allow a comment * |
| 211 | \*******************************/ |
| 212 | if(linebuf[0] == '#') continue; |
| 213 | |
| 214 | if (sscanf(linebuf, "%s\t%d\n", buf, &maj) == 2) |
| 215 | { |
| 216 | *dp = (struct devdescription *)malloc(sizeof (**dp)); |
| 217 | (*dp)->dev_name = ns(buf); |
| 218 | (*dp)->dev_major = maj; |
| 219 | dp = &(*dp)->dev_next; |
| 220 | } |
| 221 | else |
| 222 | { |
| 223 | fprintf(stderr,"illegal line in devices file\n"); |
| 224 | break; |
| 225 | } |
| 226 | } |
| 227 | *dp = 0; |
| 228 | fclose(fp); |
| 229 | devtablenotread = 0; |
| 230 | } |