1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)mkswapconf.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 /* 13 * Build a swap configuration file. 14 */ 15 #include "config.h" 16 17 #include <stdio.h> 18 #include <ctype.h> 19 20 swapconf() 21 { 22 register struct file_list *fl; 23 struct file_list *do_swap(); 24 25 fl = conf_list; 26 while (fl) { 27 if (fl->f_type != SYSTEMSPEC) { 28 fl = fl->f_next; 29 continue; 30 } 31 fl = do_swap(fl); 32 } 33 } 34 35 struct file_list * 36 do_swap(fl) 37 register struct file_list *fl; 38 { 39 FILE *fp; 40 char swapname[80]; 41 register struct file_list *swap; 42 dev_t dev; 43 44 if (eq(fl->f_fn, "generic")) { 45 fl = fl->f_next; 46 return (fl->f_next); 47 } 48 (void) sprintf(swapname, "swap%s.c", fl->f_fn); 49 fp = fopen(path(swapname), "w"); 50 if (fp == 0) { 51 perror(path(swapname)); 52 exit(1); 53 } 54 fprintf(fp, "#include \"sys/param.h\"\n"); 55 fprintf(fp, "#include \"sys/conf.h\"\n"); 56 fprintf(fp, "\n"); 57 /* 58 * If there aren't any swap devices 59 * specified, just return, the error 60 * has already been noted. 61 */ 62 swap = fl->f_next; 63 if (swap == 0 || swap->f_type != SWAPSPEC) { 64 (void) unlink(path(swapname)); 65 fclose(fp); 66 return (swap); 67 } 68 fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", 69 major(fl->f_rootdev), minor(fl->f_rootdev)); 70 fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", 71 major(fl->f_dumpdev), minor(fl->f_dumpdev)); 72 fprintf(fp, "\n"); 73 fprintf(fp, "struct\tswdevt swdevt[] = {\n"); 74 do { 75 dev = swap->f_swapdev; 76 fprintf(fp, "\t{ makedev(%d, %d),\t%d,\t%d },\t/* %s */\n", 77 major(dev), minor(dev), swap->f_swapflag, 78 swap->f_swapsize, swap->f_fn); 79 swap = swap->f_next; 80 } while (swap && swap->f_type == SWAPSPEC); 81 fprintf(fp, "\t{ NODEV, 0, 0 }\n"); 82 fprintf(fp, "};\n"); 83 fclose(fp); 84 return (swap); 85 } 86 87 static int devtablenotread = 1; 88 static struct devdescription { 89 char *dev_name; 90 int dev_major; 91 struct devdescription *dev_next; 92 } *devtable; 93 94 /* 95 * Given a device name specification figure out: 96 * major device number 97 * partition 98 * device name 99 * unit number 100 * This is a hack, but the system still thinks in 101 * terms of major/minor instead of string names. 102 */ 103 dev_t 104 nametodev(name, defunit, defpartition) 105 char *name; 106 int defunit; 107 char defpartition; 108 { 109 char *cp, partition; 110 int unit; 111 register struct devdescription *dp; 112 113 cp = name; 114 if (cp == 0) { 115 fprintf(stderr, "config: internal error, nametodev\n"); 116 exit(1); 117 } 118 while (*cp && !isdigit(*cp)) 119 cp++; 120 unit = *cp ? atoi(cp) : defunit; 121 if (unit < 0 || unit > 31) { 122 fprintf(stderr, 123 "config: %s: invalid device specification, unit out of range\n", name); 124 unit = defunit; /* carry on more checking */ 125 } 126 if (*cp) { 127 *cp++ = '\0'; 128 while (*cp && isdigit(*cp)) 129 cp++; 130 } 131 partition = *cp ? *cp : defpartition; 132 if (partition < 'a' || partition > 'h') { 133 fprintf(stderr, 134 "config: %c: invalid device specification, bad partition\n", *cp); 135 partition = defpartition; /* carry on */ 136 } 137 if (devtablenotread) 138 initdevtable(); 139 for (dp = devtable; dp; dp = dp->dev_next) 140 if (eq(name, dp->dev_name)) 141 break; 142 if (dp == 0) { 143 fprintf(stderr, "config: %s: unknown device\n", name); 144 return (NODEV); 145 } 146 return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); 147 } 148 149 char * 150 devtoname(dev) 151 dev_t dev; 152 { 153 char buf[80]; 154 register struct devdescription *dp; 155 156 if (devtablenotread) 157 initdevtable(); 158 for (dp = devtable; dp; dp = dp->dev_next) 159 if (major(dev) == dp->dev_major) 160 break; 161 if (dp == 0) 162 dp = devtable; 163 (void) sprintf(buf, "%s%d%c", dp->dev_name, 164 minor(dev) >> 3, (minor(dev) & 07) + 'a'); 165 return (ns(buf)); 166 } 167 168 initdevtable() 169 { 170 char buf[BUFSIZ]; 171 int maj; 172 register struct devdescription **dp = &devtable; 173 FILE *fp; 174 175 (void) sprintf(buf, "../conf/devices.%s", machinename); 176 fp = fopen(buf, "r"); 177 if (fp == NULL) { 178 fprintf(stderr, "config: can't open %s\n", buf); 179 exit(1); 180 } 181 while (fscanf(fp, "%s\t%d\n", buf, &maj) == 2) { 182 *dp = (struct devdescription *)malloc(sizeof (**dp)); 183 (*dp)->dev_name = ns(buf); 184 (*dp)->dev_major = maj; 185 dp = &(*dp)->dev_next; 186 } 187 *dp = 0; 188 fclose(fp); 189 devtablenotread = 0; 190 } 191