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cd68466f DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
86f9c1e9 KB |
3 | * All rights reserved. |
4 | * | |
32ce521f | 5 | * %sccs.include.redist.c% |
cd68466f DF |
6 | */ |
7 | ||
d194e412 | 8 | #ifndef lint |
441ba76a | 9 | static char sccsid[] = "@(#)mkswapconf.c 5.10 (Berkeley) %G%"; |
86f9c1e9 | 10 | #endif /* not lint */ |
d194e412 SL |
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; | |
900434b1 | 40 | char swapname[80]; |
d194e412 SL |
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 | } | |
d0aa7457 KB |
54 | fprintf(fp, "#include \"sys/param.h\"\n"); |
55 | fprintf(fp, "#include \"sys/conf.h\"\n"); | |
d194e412 SL |
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)); | |
d194e412 SL |
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),\t0,\t%d },\t/* %s */\n", | |
77 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
78 | swap = swap->f_next; | |
79 | } while (swap && swap->f_type == SWAPSPEC); | |
80 | fprintf(fp, "\t{ 0, 0, 0 }\n"); | |
81 | fprintf(fp, "};\n"); | |
82 | fclose(fp); | |
83 | return (swap); | |
84 | } | |
85 | ||
86 | static int devtablenotread = 1; | |
87 | static struct devdescription { | |
88 | char *dev_name; | |
89 | int dev_major; | |
90 | struct devdescription *dev_next; | |
91 | } *devtable; | |
92 | ||
93 | /* | |
94 | * Given a device name specification figure out: | |
95 | * major device number | |
96 | * partition | |
97 | * device name | |
98 | * unit number | |
99 | * This is a hack, but the system still thinks in | |
100 | * terms of major/minor instead of string names. | |
101 | */ | |
102 | dev_t | |
103 | nametodev(name, defunit, defpartition) | |
104 | char *name; | |
105 | int defunit; | |
106 | char defpartition; | |
107 | { | |
108 | char *cp, partition; | |
109 | int unit; | |
110 | register struct devdescription *dp; | |
111 | ||
112 | cp = name; | |
113 | if (cp == 0) { | |
114 | fprintf(stderr, "config: internal error, nametodev\n"); | |
115 | exit(1); | |
116 | } | |
117 | while (*cp && !isdigit(*cp)) | |
118 | cp++; | |
119 | unit = *cp ? atoi(cp) : defunit; | |
8243525f | 120 | if (unit < 0 || unit > 31) { |
d194e412 SL |
121 | fprintf(stderr, |
122 | "config: %s: invalid device specification, unit out of range\n", name); | |
123 | unit = defunit; /* carry on more checking */ | |
124 | } | |
125 | if (*cp) { | |
126 | *cp++ = '\0'; | |
127 | while (*cp && isdigit(*cp)) | |
128 | cp++; | |
129 | } | |
130 | partition = *cp ? *cp : defpartition; | |
131 | if (partition < 'a' || partition > 'h') { | |
132 | fprintf(stderr, | |
133 | "config: %c: invalid device specification, bad partition\n", *cp); | |
134 | partition = defpartition; /* carry on */ | |
135 | } | |
136 | if (devtablenotread) | |
137 | initdevtable(); | |
dc076cc6 | 138 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
139 | if (eq(name, dp->dev_name)) |
140 | break; | |
141 | if (dp == 0) { | |
142 | fprintf(stderr, "config: %s: unknown device\n", name); | |
143 | return (NODEV); | |
144 | } | |
145 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); | |
146 | } | |
147 | ||
148 | char * | |
149 | devtoname(dev) | |
150 | dev_t dev; | |
151 | { | |
152 | char buf[80]; | |
153 | register struct devdescription *dp; | |
154 | ||
155 | if (devtablenotread) | |
156 | initdevtable(); | |
dc076cc6 | 157 | for (dp = devtable; dp; dp = dp->dev_next) |
d194e412 SL |
158 | if (major(dev) == dp->dev_major) |
159 | break; | |
160 | if (dp == 0) | |
161 | dp = devtable; | |
9bd38ba8 | 162 | (void) sprintf(buf, "%s%d%c", dp->dev_name, |
d194e412 SL |
163 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); |
164 | return (ns(buf)); | |
165 | } | |
166 | ||
167 | initdevtable() | |
168 | { | |
169 | char buf[BUFSIZ]; | |
170 | int maj; | |
171 | register struct devdescription **dp = &devtable; | |
172 | FILE *fp; | |
173 | ||
9bd38ba8 | 174 | (void) sprintf(buf, "../conf/devices.%s", machinename); |
d194e412 SL |
175 | fp = fopen(buf, "r"); |
176 | if (fp == NULL) { | |
177 | fprintf(stderr, "config: can't open %s\n", buf); | |
178 | exit(1); | |
179 | } | |
180 | while (fscanf(fp, "%s\t%d\n", buf, &maj) == 2) { | |
181 | *dp = (struct devdescription *)malloc(sizeof (**dp)); | |
182 | (*dp)->dev_name = ns(buf); | |
183 | (*dp)->dev_major = maj; | |
184 | dp = &(*dp)->dev_next; | |
185 | } | |
186 | *dp = 0; | |
187 | fclose(fp); | |
188 | devtablenotread = 0; | |
189 | } |