UNIX 7th Ed. - /usr/src/cmd/standalone/maketape.c

   1: #include <stdio.h>
   2: #define MAXB 30
   3: int mt;
   4: int fd;
   5: char    buf[MAXB*512];
   6: char    name[50];
   7: int blksz;
   8: 
   9: main(argc, argv)
  10: int argc;
  11: char    *argv[];
  12: {
  13:     int i, j, k;
  14:     FILE *mf;
  15: 
  16:     if (argc != 3) {
  17:         fprintf(stderr, "Usage: maketape tapedrive makefile\n");
  18:         exit(0);
  19:     }
  20:     if ((mt = creat(argv[1], 0666)) < 0) {
  21:         perror(argv[1]);
  22:         exit(1);
  23:     }
  24:     if ((mf = fopen(argv[2], "r")) == NULL) {
  25:         perror(argv[2]);
  26:         exit(2);
  27:     }
  28: 
  29:     j = 0;
  30:     k = 0;
  31:     for (;;) {
  32:         if ((i = fscanf(mf, "%s %d", name, &blksz))== EOF)
  33:             exit(0);
  34:         if (i != 2) {
  35:             fprintf(stderr, "Help! Scanf didn't read 2 things (%d)\n", i);
  36:             exit(1);
  37:         }
  38:         if (blksz <= 0 || blksz > MAXB) {
  39:             fprintf(stderr, "Block size %d is invalid\n", blksz);
  40:             continue;
  41:         }
  42:         if (strcmp(name, "*") == 0) {
  43:             close(mt);
  44:             mt = open(argv[1], 2);
  45:             j = 0;
  46:             k++;
  47:             continue;
  48:         }
  49:         fd = open(name, 0);
  50:         if (fd < 0) {
  51:             perror(name);
  52:             continue;
  53:         }
  54:         printf("%s: block %d, file %d\n", name, j, k);
  55:         while (read(fd, buf, 512*blksz) > 0) {
  56:             j++;
  57:             write(mt, buf, 512*blksz);
  58:         }
  59:     }
  60: }

Defined functions

Defined variables

Defined macros