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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
33 | * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE | |
34 | * -------------------- ----- ---------------------- | |
35 | * CURRENT PATCH LEVEL: 1 00096 | |
36 | * -------------------- ----- ---------------------- | |
37 | * | |
38 | * 15 Feb 93 Julian Elischer Allow comments (leading #) in device file | |
39 | */ | |
40 | ||
41 | #ifndef lint | |
42 | static char sccsid[] = "@(#)mkswapconf.c 5.10 (Berkeley) 7/1/91"; | |
43 | #endif /* not lint */ | |
44 | ||
45 | /* | |
46 | * Build a swap configuration file. | |
47 | */ | |
48 | #include "config.h" | |
49 | ||
50 | #include <stdio.h> | |
51 | #include <ctype.h> | |
52 | ||
53 | swapconf() | |
54 | { | |
55 | register struct file_list *fl; | |
56 | struct file_list *do_swap(); | |
57 | ||
58 | fl = conf_list; | |
59 | while (fl) { | |
60 | if (fl->f_type != SYSTEMSPEC) { | |
61 | fl = fl->f_next; | |
62 | continue; | |
63 | } | |
64 | fl = do_swap(fl); | |
65 | } | |
66 | } | |
67 | ||
68 | struct file_list * | |
69 | do_swap(fl) | |
70 | register struct file_list *fl; | |
71 | { | |
72 | FILE *fp; | |
73 | char swapname[80]; | |
74 | register struct file_list *swap; | |
75 | dev_t dev; | |
76 | ||
77 | if (eq(fl->f_fn, "generic")) { | |
78 | fl = fl->f_next; | |
79 | return (fl->f_next); | |
80 | } | |
81 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); | |
82 | fp = fopen(path(swapname), "w"); | |
83 | if (fp == 0) { | |
84 | perror(path(swapname)); | |
85 | exit(1); | |
86 | } | |
87 | fprintf(fp, "#include \"sys/param.h\"\n"); | |
88 | fprintf(fp, "#include \"sys/conf.h\"\n"); | |
89 | fprintf(fp, "\n"); | |
90 | /* | |
91 | * If there aren't any swap devices | |
92 | * specified, just return, the error | |
93 | * has already been noted. | |
94 | */ | |
95 | swap = fl->f_next; | |
96 | if (swap == 0 || swap->f_type != SWAPSPEC) { | |
97 | (void) unlink(path(swapname)); | |
98 | fclose(fp); | |
99 | return (swap); | |
100 | } | |
101 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", | |
102 | major(fl->f_rootdev), minor(fl->f_rootdev)); | |
103 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", | |
104 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); | |
105 | fprintf(fp, "\n"); | |
106 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); | |
107 | do { | |
108 | dev = swap->f_swapdev; | |
109 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", | |
110 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
111 | swap = swap->f_next; | |
112 | } while (swap && swap->f_type == SWAPSPEC); | |
113 | fprintf(fp, "\t{ 0, 0, 0 }\n"); | |
114 | fprintf(fp, "};\n"); | |
115 | fclose(fp); | |
116 | return (swap); | |
117 | } | |
118 | ||
119 | static int devtablenotread = 1; | |
120 | static struct devdescription { | |
121 | char *dev_name; | |
122 | int dev_major; | |
123 | struct devdescription *dev_next; | |
124 | } *devtable; | |
125 | ||
126 | /* | |
127 | * Given a device name specification figure out: | |
128 | * major device number | |
129 | * partition | |
130 | * device name | |
131 | * unit number | |
132 | * This is a hack, but the system still thinks in | |
133 | * terms of major/minor instead of string names. | |
134 | */ | |
135 | dev_t | |
136 | nametodev(name, defunit, defpartition) | |
137 | char *name; | |
138 | int defunit; | |
139 | char defpartition; | |
140 | { | |
141 | char *cp, partition; | |
142 | int unit; | |
143 | register struct devdescription *dp; | |
144 | ||
145 | cp = name; | |
146 | if (cp == 0) { | |
147 | fprintf(stderr, "config: internal error, nametodev\n"); | |
148 | exit(1); | |
149 | } | |
150 | while (*cp && !isdigit(*cp)) | |
151 | cp++; | |
152 | unit = *cp ? atoi(cp) : defunit; | |
153 | if (unit < 0 || unit > 31) { | |
154 | fprintf(stderr, | |
155 | "config: %s: invalid device specification, unit out of range\n", name); | |
156 | unit = defunit; /* carry on more checking */ | |
157 | } | |
158 | if (*cp) { | |
159 | *cp++ = '\0'; | |
160 | while (*cp && isdigit(*cp)) | |
161 | cp++; | |
162 | } | |
163 | partition = *cp ? *cp : defpartition; | |
164 | if (partition < 'a' || partition > 'h') { | |
165 | fprintf(stderr, | |
166 | "config: %c: invalid device specification, bad partition\n", *cp); | |
167 | partition = defpartition; /* carry on */ | |
168 | } | |
169 | if (devtablenotread) | |
170 | initdevtable(); | |
171 | for (dp = devtable; dp; dp = dp->dev_next) | |
172 | if (eq(name, dp->dev_name)) | |
173 | break; | |
174 | if (dp == 0) { | |
175 | fprintf(stderr, "config: %s: unknown device\n", name); | |
176 | return (NODEV); | |
177 | } | |
178 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); | |
179 | } | |
180 | ||
181 | char * | |
182 | devtoname(dev) | |
183 | dev_t dev; | |
184 | { | |
185 | char buf[80]; | |
186 | register struct devdescription *dp; | |
187 | ||
188 | if (devtablenotread) | |
189 | initdevtable(); | |
190 | for (dp = devtable; dp; dp = dp->dev_next) | |
191 | if (major(dev) == dp->dev_major) | |
192 | break; | |
193 | if (dp == 0) | |
194 | dp = devtable; | |
195 | (void) sprintf(buf, "%s%d%c", dp->dev_name, | |
196 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); | |
197 | return (ns(buf)); | |
198 | } | |
199 | ||
200 | initdevtable() | |
201 | { | |
202 | char linebuf[256]; | |
203 | char buf[BUFSIZ]; | |
204 | int maj; | |
205 | register struct devdescription **dp = &devtable; | |
206 | FILE *fp; | |
207 | ||
208 | (void) sprintf(buf, "../conf/devices.%s", machinename); | |
209 | fp = fopen(buf, "r"); | |
210 | if (fp == NULL) { | |
211 | fprintf(stderr, "config: can't open %s\n", buf); | |
212 | exit(1); | |
213 | } | |
214 | while(fgets(linebuf,256,fp)) | |
215 | { | |
216 | /*******************************\ | |
217 | * Allow a comment * | |
218 | \*******************************/ | |
219 | if(linebuf[0] == '#') continue; | |
220 | ||
221 | if (sscanf(linebuf, "%s\t%d\n", buf, &maj) == 2) | |
222 | { | |
223 | *dp = (struct devdescription *)malloc(sizeof (**dp)); | |
224 | (*dp)->dev_name = ns(buf); | |
225 | (*dp)->dev_major = maj; | |
226 | dp = &(*dp)->dev_next; | |
227 | } | |
228 | else | |
229 | { | |
230 | fprintf(stderr,"illegal line in devices file\n"); | |
231 | break; | |
232 | } | |
233 | } | |
234 | *dp = 0; | |
235 | fclose(fp); | |
236 | devtablenotread = 0; | |
237 | } |