BSD 3 development

[unix-history] / usr / src / cmd / mknod.c

main(argc, argv)
int argc;
char **argv;
{
       int m, a, b;

       if(argc != 5) {
               printf("arg count\n");
               goto usage;
       }
       if(*argv[2] == 'b')
               m = 060666; else
       if(*argv[2] == 'c')
               m = 020666; else
               goto usage;
       a = number(argv[3]);
       if(a < 0)
               goto usage;
       b = number(argv[4]);
       if(b < 0)
               goto usage;
       if(mknod(argv[1], m, (a<<8)|b) < 0)
               perror("mknod");
       exit(0);

usage:
       printf("usage: mknod name b/c major minor\n");
}

number(s)
char *s;
{
       int n, c;

       n = 0;
       while(c = *s++) {
               if(c<'0' || c>'9')
                       return(-1);
               n = n*10 + c-'0';
       }
       return(n);
}