Commit | Line | Data |
---|---|---|
cd68466f DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
d194e412 | 7 | #ifndef lint |
cd68466f DF |
8 | static char sccsid[] = "@(#)mkswapconf.c 5.1 (Berkeley) %G%"; |
9 | #endif not lint | |
d194e412 SL |
10 | |
11 | /* | |
12 | * Build a swap configuration file. | |
13 | */ | |
14 | #include "config.h" | |
15 | ||
16 | #include <stdio.h> | |
17 | #include <ctype.h> | |
18 | ||
19 | swapconf() | |
20 | { | |
21 | register struct file_list *fl; | |
22 | struct file_list *do_swap(); | |
23 | ||
24 | fl = conf_list; | |
25 | while (fl) { | |
26 | if (fl->f_type != SYSTEMSPEC) { | |
27 | fl = fl->f_next; | |
28 | continue; | |
29 | } | |
30 | fl = do_swap(fl); | |
31 | } | |
32 | } | |
33 | ||
34 | struct file_list * | |
35 | do_swap(fl) | |
36 | register struct file_list *fl; | |
37 | { | |
38 | FILE *fp; | |
39 | char swapname[80], *cp; | |
40 | register struct file_list *swap; | |
41 | dev_t dev; | |
42 | ||
43 | if (eq(fl->f_fn, "generic")) { | |
44 | fl = fl->f_next; | |
45 | return (fl->f_next); | |
46 | } | |
47 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); | |
48 | fp = fopen(path(swapname), "w"); | |
49 | if (fp == 0) { | |
50 | perror(path(swapname)); | |
51 | exit(1); | |
52 | } | |
53 | fprintf(fp, "#include \"../h/param.h\"\n"); | |
54 | fprintf(fp, "#include \"../h/conf.h\"\n"); | |
55 | fprintf(fp, "\n"); | |
56 | /* | |
57 | * If there aren't any swap devices | |
58 | * specified, just return, the error | |
59 | * has already been noted. | |
60 | */ | |
61 | swap = fl->f_next; | |
62 | if (swap == 0 || swap->f_type != SWAPSPEC) { | |
63 | (void) unlink(path(swapname)); | |
64 | fclose(fp); | |
65 | return (swap); | |
66 | } | |
67 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", | |
68 | major(fl->f_rootdev), minor(fl->f_rootdev)); | |
69 | fprintf(fp, "dev_t\targdev = makedev(%d, %d);\n", | |
70 | major(fl->f_argdev), minor(fl->f_argdev)); | |
71 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", | |
72 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); | |
73 | fprintf(fp, "\n"); | |
74 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); | |
75 | do { | |
76 | dev = swap->f_swapdev; | |
77 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", | |
78 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
79 | swap = swap->f_next; | |
80 | } while (swap && swap->f_type == SWAPSPEC); | |
81 | fprintf(fp, "\t{ 0, 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; | |
8243525f | 121 | if (unit < 0 || unit > 31) { |
d194e412 SL |
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->dev_next; 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->dev_next; dp = dp->dev_next) | |
159 | if (major(dev) == dp->dev_major) | |
160 | break; | |
161 | if (dp == 0) | |
162 | dp = devtable; | |
163 | 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 | 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 | } |