Usermode/Applications/cat_src/main.c

   1 /*
   2  * Acess2 CAT command
   3  */
   4 #include <acess/sys.h>
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7
   8 #define BUF_SIZE        1024
   9
  10 /**
  11  * \fn int main(int argc, char *argv[])
  12  * \brief Entrypoint
  13  */
  14 int main(int argc, char *argv[])
  15 {
  16          int    fd;
  17          int    num;
  18         char    buf[BUF_SIZE];
  19
  20         if(argc < 2) {
  21                 printf("Usage: cat <file>\n");
  22                 return -1;
  23         }
  24
  25         fd = open(argv[1], OPENFLAG_READ);
  26         if(fd == -1) {
  27                 printf("Unable to open '%s' for reading\n", argv[1]);
  28                 return -1;
  29         }
  30
  31         do {
  32                 num = read(fd, buf, BUF_SIZE);
  33                 if(num < 0)     break;
  34                 write(1, buf, num);
  35         } while(num == BUF_SIZE);
  36
  37         close(fd);
  38         printf("\n");
  39
  40         return 0;
  41 }