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cd68466f DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
86f9c1e9 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific prior written permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
cd68466f DF |
11 | */ |
12 | ||
d194e412 | 13 | #ifndef lint |
86f9c1e9 KB |
14 | static char sccsid[] = "@(#)mkswapconf.c 5.5 (Berkeley) %G%"; |
15 | #endif /* not lint */ | |
d194e412 SL |
16 | |
17 | /* | |
18 | * Build a swap configuration file. | |
19 | */ | |
20 | #include "config.h" | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <ctype.h> | |
24 | ||
25 | swapconf() | |
26 | { | |
27 | register struct file_list *fl; | |
28 | struct file_list *do_swap(); | |
29 | ||
30 | fl = conf_list; | |
31 | while (fl) { | |
32 | if (fl->f_type != SYSTEMSPEC) { | |
33 | fl = fl->f_next; | |
34 | continue; | |
35 | } | |
36 | fl = do_swap(fl); | |
37 | } | |
38 | } | |
39 | ||
40 | struct file_list * | |
41 | do_swap(fl) | |
42 | register struct file_list *fl; | |
43 | { | |
44 | FILE *fp; | |
900434b1 | 45 | char swapname[80]; |
d194e412 SL |
46 | register struct file_list *swap; |
47 | dev_t dev; | |
48 | ||
49 | if (eq(fl->f_fn, "generic")) { | |
50 | fl = fl->f_next; | |
51 | return (fl->f_next); | |
52 | } | |
53 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); | |
54 | fp = fopen(path(swapname), "w"); | |
55 | if (fp == 0) { | |
56 | perror(path(swapname)); | |
57 | exit(1); | |
58 | } | |
59 | fprintf(fp, "#include \"../h/param.h\"\n"); | |
60 | fprintf(fp, "#include \"../h/conf.h\"\n"); | |
61 | fprintf(fp, "\n"); | |
62 | /* | |
63 | * If there aren't any swap devices | |
64 | * specified, just return, the error | |
65 | * has already been noted. | |
66 | */ | |
67 | swap = fl->f_next; | |
68 | if (swap == 0 || swap->f_type != SWAPSPEC) { | |
69 | (void) unlink(path(swapname)); | |
70 | fclose(fp); | |
71 | return (swap); | |
72 | } | |
73 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", | |
74 | major(fl->f_rootdev), minor(fl->f_rootdev)); | |
75 | fprintf(fp, "dev_t\targdev = makedev(%d, %d);\n", | |
76 | major(fl->f_argdev), minor(fl->f_argdev)); | |
77 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", | |
78 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); | |
79 | fprintf(fp, "\n"); | |
80 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); | |
81 | do { | |
82 | dev = swap->f_swapdev; | |
83 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", | |
84 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
85 | swap = swap->f_next; | |
86 | } while (swap && swap->f_type == SWAPSPEC); | |
87 | fprintf(fp, "\t{ 0, 0, 0 }\n"); | |
88 | fprintf(fp, "};\n"); | |
89 | fclose(fp); | |
90 | return (swap); | |
91 | } | |
92 | ||
93 | static int devtablenotread = 1; | |
94 | static struct devdescription { | |
95 | char *dev_name; | |
96 | int dev_major; | |
97 | struct devdescription *dev_next; | |
98 | } *devtable; | |
99 | ||
100 | /* | |
101 | * Given a device name specification figure out: | |
102 | * major device number | |
103 | * partition | |
104 | * device name | |
105 | * unit number | |
106 | * This is a hack, but the system still thinks in | |
107 | * terms of major/minor instead of string names. | |
108 | */ | |
109 | dev_t | |
110 | nametodev(name, defunit, defpartition) | |
111 | char *name; | |
112 | int defunit; | |
113 | char defpartition; | |
114 | { | |
115 | char *cp, partition; | |
116 | int unit; | |
117 | register struct devdescription *dp; | |
118 | ||
119 | cp = name; | |
120 | if (cp == 0) { | |
121 | fprintf(stderr, "config: internal error, nametodev\n"); | |
122 | exit(1); | |
123 | } | |
124 | while (*cp && !isdigit(*cp)) | |
125 | cp++; | |
126 | unit = *cp ? atoi(cp) : defunit; | |
8243525f | 127 | if (unit < 0 || unit > 31) { |
d194e412 SL |
128 | fprintf(stderr, |
129 | "config: %s: invalid device specification, unit out of range\n", name); | |
130 | unit = defunit; /* carry on more checking */ | |
131 | } | |
132 | if (*cp) { | |
133 | *cp++ = '\0'; | |
134 | while (*cp && isdigit(*cp)) | |
135 | cp++; | |
136 | } | |
137 | partition = *cp ? *cp : defpartition; | |
138 | if (partition < 'a' || partition > 'h') { | |
139 | fprintf(stderr, | |
140 | "config: %c: invalid device specification, bad partition\n", *cp); | |
141 | partition = defpartition; /* carry on */ | |
142 | } | |
143 | if (devtablenotread) | |
144 | initdevtable(); | |
dc076cc6 | 145 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
146 | if (eq(name, dp->dev_name)) |
147 | break; | |
148 | if (dp == 0) { | |
149 | fprintf(stderr, "config: %s: unknown device\n", name); | |
150 | return (NODEV); | |
151 | } | |
152 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); | |
153 | } | |
154 | ||
155 | char * | |
156 | devtoname(dev) | |
157 | dev_t dev; | |
158 | { | |
159 | char buf[80]; | |
160 | register struct devdescription *dp; | |
161 | ||
162 | if (devtablenotread) | |
163 | initdevtable(); | |
dc076cc6 | 164 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
165 | if (major(dev) == dp->dev_major) |
166 | break; | |
167 | if (dp == 0) | |
168 | dp = devtable; | |
9bd38ba8 | 169 | (void) sprintf(buf, "%s%d%c", dp->dev_name, |
d194e412 SL |
170 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); |
171 | return (ns(buf)); | |
172 | } | |
173 | ||
174 | initdevtable() | |
175 | { | |
176 | char buf[BUFSIZ]; | |
177 | int maj; | |
178 | register struct devdescription **dp = &devtable; | |
179 | FILE *fp; | |
180 | ||
9bd38ba8 | 181 | (void) sprintf(buf, "../conf/devices.%s", machinename); |
d194e412 SL |
182 | fp = fopen(buf, "r"); |
183 | if (fp == NULL) { | |
184 | fprintf(stderr, "config: can't open %s\n", buf); | |
185 | exit(1); | |
186 | } | |
187 | while (fscanf(fp, "%s\t%d\n", buf, &maj) == 2) { | |
188 | *dp = (struct devdescription *)malloc(sizeof (**dp)); | |
189 | (*dp)->dev_name = ns(buf); | |
190 | (*dp)->dev_major = maj; | |
191 | dp = &(*dp)->dev_next; | |
192 | } | |
193 | *dp = 0; | |
194 | fclose(fp); | |
195 | devtablenotread = 0; | |
196 | } |