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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 | |
b8c620d6 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
cd68466f DF |
16 | */ |
17 | ||
d194e412 | 18 | #ifndef lint |
b8c620d6 | 19 | static char sccsid[] = "@(#)mkswapconf.c 5.6 (Berkeley) %G%"; |
86f9c1e9 | 20 | #endif /* not lint */ |
d194e412 SL |
21 | |
22 | /* | |
23 | * Build a swap configuration file. | |
24 | */ | |
25 | #include "config.h" | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <ctype.h> | |
29 | ||
30 | swapconf() | |
31 | { | |
32 | register struct file_list *fl; | |
33 | struct file_list *do_swap(); | |
34 | ||
35 | fl = conf_list; | |
36 | while (fl) { | |
37 | if (fl->f_type != SYSTEMSPEC) { | |
38 | fl = fl->f_next; | |
39 | continue; | |
40 | } | |
41 | fl = do_swap(fl); | |
42 | } | |
43 | } | |
44 | ||
45 | struct file_list * | |
46 | do_swap(fl) | |
47 | register struct file_list *fl; | |
48 | { | |
49 | FILE *fp; | |
900434b1 | 50 | char swapname[80]; |
d194e412 SL |
51 | register struct file_list *swap; |
52 | dev_t dev; | |
53 | ||
54 | if (eq(fl->f_fn, "generic")) { | |
55 | fl = fl->f_next; | |
56 | return (fl->f_next); | |
57 | } | |
58 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); | |
59 | fp = fopen(path(swapname), "w"); | |
60 | if (fp == 0) { | |
61 | perror(path(swapname)); | |
62 | exit(1); | |
63 | } | |
64 | fprintf(fp, "#include \"../h/param.h\"\n"); | |
65 | fprintf(fp, "#include \"../h/conf.h\"\n"); | |
66 | fprintf(fp, "\n"); | |
67 | /* | |
68 | * If there aren't any swap devices | |
69 | * specified, just return, the error | |
70 | * has already been noted. | |
71 | */ | |
72 | swap = fl->f_next; | |
73 | if (swap == 0 || swap->f_type != SWAPSPEC) { | |
74 | (void) unlink(path(swapname)); | |
75 | fclose(fp); | |
76 | return (swap); | |
77 | } | |
78 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", | |
79 | major(fl->f_rootdev), minor(fl->f_rootdev)); | |
80 | fprintf(fp, "dev_t\targdev = makedev(%d, %d);\n", | |
81 | major(fl->f_argdev), minor(fl->f_argdev)); | |
82 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", | |
83 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); | |
84 | fprintf(fp, "\n"); | |
85 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); | |
86 | do { | |
87 | dev = swap->f_swapdev; | |
88 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", | |
89 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
90 | swap = swap->f_next; | |
91 | } while (swap && swap->f_type == SWAPSPEC); | |
92 | fprintf(fp, "\t{ 0, 0, 0 }\n"); | |
93 | fprintf(fp, "};\n"); | |
94 | fclose(fp); | |
95 | return (swap); | |
96 | } | |
97 | ||
98 | static int devtablenotread = 1; | |
99 | static struct devdescription { | |
100 | char *dev_name; | |
101 | int dev_major; | |
102 | struct devdescription *dev_next; | |
103 | } *devtable; | |
104 | ||
105 | /* | |
106 | * Given a device name specification figure out: | |
107 | * major device number | |
108 | * partition | |
109 | * device name | |
110 | * unit number | |
111 | * This is a hack, but the system still thinks in | |
112 | * terms of major/minor instead of string names. | |
113 | */ | |
114 | dev_t | |
115 | nametodev(name, defunit, defpartition) | |
116 | char *name; | |
117 | int defunit; | |
118 | char defpartition; | |
119 | { | |
120 | char *cp, partition; | |
121 | int unit; | |
122 | register struct devdescription *dp; | |
123 | ||
124 | cp = name; | |
125 | if (cp == 0) { | |
126 | fprintf(stderr, "config: internal error, nametodev\n"); | |
127 | exit(1); | |
128 | } | |
129 | while (*cp && !isdigit(*cp)) | |
130 | cp++; | |
131 | unit = *cp ? atoi(cp) : defunit; | |
8243525f | 132 | if (unit < 0 || unit > 31) { |
d194e412 SL |
133 | fprintf(stderr, |
134 | "config: %s: invalid device specification, unit out of range\n", name); | |
135 | unit = defunit; /* carry on more checking */ | |
136 | } | |
137 | if (*cp) { | |
138 | *cp++ = '\0'; | |
139 | while (*cp && isdigit(*cp)) | |
140 | cp++; | |
141 | } | |
142 | partition = *cp ? *cp : defpartition; | |
143 | if (partition < 'a' || partition > 'h') { | |
144 | fprintf(stderr, | |
145 | "config: %c: invalid device specification, bad partition\n", *cp); | |
146 | partition = defpartition; /* carry on */ | |
147 | } | |
148 | if (devtablenotread) | |
149 | initdevtable(); | |
dc076cc6 | 150 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
151 | if (eq(name, dp->dev_name)) |
152 | break; | |
153 | if (dp == 0) { | |
154 | fprintf(stderr, "config: %s: unknown device\n", name); | |
155 | return (NODEV); | |
156 | } | |
157 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); | |
158 | } | |
159 | ||
160 | char * | |
161 | devtoname(dev) | |
162 | dev_t dev; | |
163 | { | |
164 | char buf[80]; | |
165 | register struct devdescription *dp; | |
166 | ||
167 | if (devtablenotread) | |
168 | initdevtable(); | |
dc076cc6 | 169 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
170 | if (major(dev) == dp->dev_major) |
171 | break; | |
172 | if (dp == 0) | |
173 | dp = devtable; | |
9bd38ba8 | 174 | (void) sprintf(buf, "%s%d%c", dp->dev_name, |
d194e412 SL |
175 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); |
176 | return (ns(buf)); | |
177 | } | |
178 | ||
179 | initdevtable() | |
180 | { | |
181 | char buf[BUFSIZ]; | |
182 | int maj; | |
183 | register struct devdescription **dp = &devtable; | |
184 | FILE *fp; | |
185 | ||
9bd38ba8 | 186 | (void) sprintf(buf, "../conf/devices.%s", machinename); |
d194e412 SL |
187 | fp = fopen(buf, "r"); |
188 | if (fp == NULL) { | |
189 | fprintf(stderr, "config: can't open %s\n", buf); | |
190 | exit(1); | |
191 | } | |
192 | while (fscanf(fp, "%s\t%d\n", buf, &maj) == 2) { | |
193 | *dp = (struct devdescription *)malloc(sizeof (**dp)); | |
194 | (*dp)->dev_name = ns(buf); | |
195 | (*dp)->dev_major = maj; | |
196 | dp = &(*dp)->dev_next; | |
197 | } | |
198 | *dp = 0; | |
199 | fclose(fp); | |
200 | devtablenotread = 0; | |
201 | } |