cat.c

来自「linux内核」· C语言 代码 · 共 32 行

#include <stdio.h>
#include <stdlib.h>
#include <console.h>

int main(int argc, char *argv[])
{
  FILE *f;
  int ch;
  int i;

  openconsole(&dev_stdcon_r, &dev_stdcon_w);

  printf("argv = %p\n", argv);
  for ( i = 0 ; i <= argc ; i++ )
    printf("argv[%d] = %p = \"%s\"\n", i, argv[i], argv[i]);

  if ( argc < 2 ) {
    fprintf(stderr, "Missing file name!\n");
    exit(1);
  }

  printf("File = %s\n", argv[1]);

  f = fopen(argv[1], "r");
  while ( (ch = getc(f)) != EOF )
    putchar(ch);

  fclose(f);

  return 0;
}