ATF testcase

ate-read.c

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <sys/errno.h>
#include <atf-c.h>

extern int errno;

ATF_TC(read_test);

ATF_TC_HEAD(read_test, tc) {
  atf_tc_set_md_var(tc, "descr", "Testing read");
}

ATF_TC_BODY(read_test, tc) {
  ssize_t ret;
  char *file = "readtester.txt";
  int fd = open(file, O_WRONLY);
  if (fd == -1) {
    printf("open failed: %i\n", errno);
    exit(1);
  }

  char data[] = "The quick brown fox jumped over the wall";
  char buf[sizeof(data)];
  ret = write(fd, data, sizeof(data));
  printf("bytes written: %zu\n", ret);

  fsync(fd);

  fd = close(fd);
  if (fd == -1) {
    printf("close failed\n");
    exit(1);
  }

  fd = open(file, O_RDONLY);
  if (fd == -1) {
    printf("close failed\n");
    exit(1);
  }

  ret = read(fd, buf, sizeof(buf));
  printf("bytes read: %zu\n", ret);

  close(fd);

  printf("buffer: %s\n", buf);
}

ATF_TP_ADD_TCS(tp) {
  ATF_TP_ADD_TC(tp, read_test);

  return atf_no_error();
}