tom.c

用五个实例来解释linux下的c编程

/* tom.c v2.0 */

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>

#define FILE "message.txt"

int main()
{
  int fd;
  char msg[] = "message.txt created by Tom.\n";
  ssize_t s;

  /* Open file for write. */
  fd = open(FILE, O_CREAT | O_TRUNC | O_WRONLY, 0666);
  if(fd < 0) {
    perror("open");
  }
  /* Write message. */
  s = write(fd, &msg, sizeof(msg)-1);
  /* Close file. */
  close(fd);

  exit(EXIT_SUCCESS);
}