Commit | Line | Data |
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d194e412 | 1 | #ifndef lint |
8243525f | 2 | static char sccsid[] = "@(#)mkswapconf.c 4.2 (Berkeley) %G%"; |
d194e412 SL |
3 | #endif |
4 | ||
5 | /* | |
6 | * Build a swap configuration file. | |
7 | */ | |
8 | #include "config.h" | |
9 | ||
10 | #include <stdio.h> | |
11 | #include <ctype.h> | |
12 | ||
13 | swapconf() | |
14 | { | |
15 | register struct file_list *fl; | |
16 | struct file_list *do_swap(); | |
17 | ||
18 | fl = conf_list; | |
19 | while (fl) { | |
20 | if (fl->f_type != SYSTEMSPEC) { | |
21 | fl = fl->f_next; | |
22 | continue; | |
23 | } | |
24 | fl = do_swap(fl); | |
25 | } | |
26 | } | |
27 | ||
28 | struct file_list * | |
29 | do_swap(fl) | |
30 | register struct file_list *fl; | |
31 | { | |
32 | FILE *fp; | |
33 | char swapname[80], *cp; | |
34 | register struct file_list *swap; | |
35 | dev_t dev; | |
36 | ||
37 | if (eq(fl->f_fn, "generic")) { | |
38 | fl = fl->f_next; | |
39 | return (fl->f_next); | |
40 | } | |
41 | (void) sprintf(swapname, "swap%s.c", fl->f_fn); | |
42 | fp = fopen(path(swapname), "w"); | |
43 | if (fp == 0) { | |
44 | perror(path(swapname)); | |
45 | exit(1); | |
46 | } | |
47 | fprintf(fp, "#include \"../h/param.h\"\n"); | |
48 | fprintf(fp, "#include \"../h/conf.h\"\n"); | |
49 | fprintf(fp, "\n"); | |
50 | /* | |
51 | * If there aren't any swap devices | |
52 | * specified, just return, the error | |
53 | * has already been noted. | |
54 | */ | |
55 | swap = fl->f_next; | |
56 | if (swap == 0 || swap->f_type != SWAPSPEC) { | |
57 | (void) unlink(path(swapname)); | |
58 | fclose(fp); | |
59 | return (swap); | |
60 | } | |
61 | fprintf(fp, "dev_t\trootdev = makedev(%d, %d);\n", | |
62 | major(fl->f_rootdev), minor(fl->f_rootdev)); | |
63 | fprintf(fp, "dev_t\targdev = makedev(%d, %d);\n", | |
64 | major(fl->f_argdev), minor(fl->f_argdev)); | |
65 | fprintf(fp, "dev_t\tdumpdev = makedev(%d, %d);\n", | |
66 | major(fl->f_dumpdev), minor(fl->f_dumpdev)); | |
67 | fprintf(fp, "\n"); | |
68 | fprintf(fp, "struct\tswdevt swdevt[] = {\n"); | |
69 | do { | |
70 | dev = swap->f_swapdev; | |
71 | fprintf(fp, "\t{ makedev(%d, %d),\t0,\t%d },\t/* %s */\n", | |
72 | major(dev), minor(dev), swap->f_swapsize, swap->f_fn); | |
73 | swap = swap->f_next; | |
74 | } while (swap && swap->f_type == SWAPSPEC); | |
75 | fprintf(fp, "\t{ 0, 0, 0 }\n"); | |
76 | fprintf(fp, "};\n"); | |
77 | fclose(fp); | |
78 | return (swap); | |
79 | } | |
80 | ||
81 | static int devtablenotread = 1; | |
82 | static struct devdescription { | |
83 | char *dev_name; | |
84 | int dev_major; | |
85 | struct devdescription *dev_next; | |
86 | } *devtable; | |
87 | ||
88 | /* | |
89 | * Given a device name specification figure out: | |
90 | * major device number | |
91 | * partition | |
92 | * device name | |
93 | * unit number | |
94 | * This is a hack, but the system still thinks in | |
95 | * terms of major/minor instead of string names. | |
96 | */ | |
97 | dev_t | |
98 | nametodev(name, defunit, defpartition) | |
99 | char *name; | |
100 | int defunit; | |
101 | char defpartition; | |
102 | { | |
103 | char *cp, partition; | |
104 | int unit; | |
105 | register struct devdescription *dp; | |
106 | ||
107 | cp = name; | |
108 | if (cp == 0) { | |
109 | fprintf(stderr, "config: internal error, nametodev\n"); | |
110 | exit(1); | |
111 | } | |
112 | while (*cp && !isdigit(*cp)) | |
113 | cp++; | |
114 | unit = *cp ? atoi(cp) : defunit; | |
8243525f | 115 | if (unit < 0 || unit > 31) { |
d194e412 SL |
116 | fprintf(stderr, |
117 | "config: %s: invalid device specification, unit out of range\n", name); | |
118 | unit = defunit; /* carry on more checking */ | |
119 | } | |
120 | if (*cp) { | |
121 | *cp++ = '\0'; | |
122 | while (*cp && isdigit(*cp)) | |
123 | cp++; | |
124 | } | |
125 | partition = *cp ? *cp : defpartition; | |
126 | if (partition < 'a' || partition > 'h') { | |
127 | fprintf(stderr, | |
128 | "config: %c: invalid device specification, bad partition\n", *cp); | |
129 | partition = defpartition; /* carry on */ | |
130 | } | |
131 | if (devtablenotread) | |
132 | initdevtable(); | |
133 | for (dp = devtable; dp->dev_next; dp = dp->dev_next) | |
134 | if (eq(name, dp->dev_name)) | |
135 | break; | |
136 | if (dp == 0) { | |
137 | fprintf(stderr, "config: %s: unknown device\n", name); | |
138 | return (NODEV); | |
139 | } | |
140 | return (makedev(dp->dev_major, (unit << 3) + (partition - 'a'))); | |
141 | } | |
142 | ||
143 | char * | |
144 | devtoname(dev) | |
145 | dev_t dev; | |
146 | { | |
147 | char buf[80]; | |
148 | register struct devdescription *dp; | |
149 | ||
150 | if (devtablenotread) | |
151 | initdevtable(); | |
152 | for (dp = devtable; dp->dev_next; dp = dp->dev_next) | |
153 | if (major(dev) == dp->dev_major) | |
154 | break; | |
155 | if (dp == 0) | |
156 | dp = devtable; | |
157 | sprintf(buf, "%s%d%c", dp->dev_name, | |
158 | minor(dev) >> 3, (minor(dev) & 07) + 'a'); | |
159 | return (ns(buf)); | |
160 | } | |
161 | ||
162 | initdevtable() | |
163 | { | |
164 | char buf[BUFSIZ]; | |
165 | int maj; | |
166 | register struct devdescription **dp = &devtable; | |
167 | FILE *fp; | |
168 | ||
169 | sprintf(buf, "../conf/devices.%s", machinename); | |
170 | fp = fopen(buf, "r"); | |
171 | if (fp == NULL) { | |
172 | fprintf(stderr, "config: can't open %s\n", buf); | |
173 | exit(1); | |
174 | } | |
175 | while (fscanf(fp, "%s\t%d\n", buf, &maj) == 2) { | |
176 | *dp = (struct devdescription *)malloc(sizeof (**dp)); | |
177 | (*dp)->dev_name = ns(buf); | |
178 | (*dp)->dev_major = maj; | |
179 | dp = &(*dp)->dev_next; | |
180 | } | |
181 | *dp = 0; | |
182 | fclose(fp); | |
183 | devtablenotread = 0; | |
184 | } |