Usermode/Applications/cat_src/main.c

   1 /*
   2  * Acess2 CAT command
   3  */
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 #define BUF_SIZE        1024
   8
   9 /**
  10  * \fn int main(int argc, char *argv[])
  11  * \brief Entrypoint
  12  */
  13 int main(int argc, char *argv[])
  14 {
  15         size_t  num;
  16         char    buf[BUF_SIZE];
  17
  18         if(argc < 2) {
  19                 printf("Usage: cat <file>\n");
  20                 return -1;
  21         }
  22
  23         FILE *fp = fopen(argv[1], "r");
  24         if(!fp) {
  25                 printf("Unable to open '%s' for reading\n", argv[1]);
  26                 return -1;
  27         }
  28
  29         do {
  30                 num = fread(buf, 1, BUF_SIZE, fp);
  31                 if(num <= 0)    break;
  32                 fwrite(buf, 1, num, stdout);
  33         } while(num == BUF_SIZE);
  34
  35         fclose(fp);
  36         printf("\n");
  37
  38         return 0;
  39 }