43 lines
563 B
C
43 lines
563 B
C
main(argc, argv)
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int argc;
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char **argv;
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{
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int m, a, b;
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if(argc != 5) {
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printf("arg count\n");
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goto usage;
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}
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if(*argv[2] == 'b')
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m = 0160666; else
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if(*argv[2] == 'c')
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m = 0120666; else
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goto usage;
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a = number(argv[3]);
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if(a < 0)
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goto usage;
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b = number(argv[4]);
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if(b < 0)
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goto usage;
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if(mknod(argv[1], m, (a<<8)|b) < 0)
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perror("mknod");
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exit();
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usage:
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printf("usage: mknod name b/c major minor\n");
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}
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number(s)
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char *s;
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{
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int n, c;
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n = 0;
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while(c = *s++) {
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if(c<'0' || c>'9')
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return(-1);
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n = n*10 + c-'0';
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}
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return(n);
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}
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