text: /*
   * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "tests.h"
  #include <asm/unistd.h>
  
  #ifdef __NR_getdents
  
  # include <assert.h>
  # include <dirent.h>
  # include <fcntl.h>
  # include <stddef.h>
  # include <stdio.h>
  # include <sys/stat.h>
  # include <unistd.h>
  
  static const char fname[] =
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  	"A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nZ";
  static const char qname[] =
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  	"A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nZ";
  
  static char buf[8192];
  
  static const char *
  str_d_type(const unsigned char d_type)
  {
  	switch (d_type) {
  		case DT_DIR:
  			return "DT_DIR";
  		case DT_REG:
  			return "DT_REG";
  		default:
  			return "DT_UNKNOWN";
  	}
  }
  static void
  print_dirent(const kernel_dirent *d)
  {
  	const unsigned int d_name_offset = offsetof(kernel_dirent, d_name);
  	int d_name_len = d->d_reclen - d_name_offset - 1;
  	assert(d_name_len > 0);
  
  	printf("{d_ino=%llu, d_off=%llu, d_reclen=%u, d_name=",
  	       (unsigned long long) d->d_ino,
  	       (unsigned long long) d->d_off, d->d_reclen);
  
  	if (d->d_name[0] == '.')
  		printf("\"%.*s\"", d_name_len, d->d_name);
  	else
  		printf("\"%s\"", qname);
  
  	printf(", d_type=%s}",
  	       str_d_type(*((const char *) d + d->d_reclen - 1)));
  }
  
  int
  main(int ac, const char **av)
  {
  	char *dname;
  
  	assert(ac == 1);
  	assert(asprintf(&dname, "%s.test.tmp.dir", av[0]) > 0);
  	assert(!mkdir(dname, 0700));
  	assert(!chdir(dname));
  	(void) close(0);
  	assert(!creat(fname, 0600));
  	assert(!close(0));
  	assert(!open(".", O_RDONLY | O_DIRECTORY));
  
  	unsigned long count = (unsigned long) 0xfacefeeddeadbeefULL;
  	long rc = syscall(__NR_getdents, (long) 0xdefacedffffffffULL, NULL,
  			  count);
  	printf("getdents(-1, NULL, %u) = %ld %s (%m)\n",
  	       (unsigned) count, rc, errno2name());
  
  	count = (unsigned long) 0xfacefeed00000000ULL | sizeof(buf);
  	while ((rc = syscall(__NR_getdents, 0, buf, count))) {
  		kernel_dirent *d;
  		long i;
  
  		if (rc < 0)
  			perror_msg_and_skip("getdents");
  		printf("getdents(0, [");
  		for (i = 0; i < rc; i += d->d_reclen) {
  			d = (kernel_dirent *) &buf[i];
  			if (i)
  				printf(", ");
  			print_dirent(d);
  		}
  		printf("], %u) = %ld\n", (unsigned) count, rc);
  	}
  	printf("getdents(0, [], %u) = 0\n", (unsigned) count);
  	puts("+++ exited with 0 +++");
  	assert(!unlink(fname));
  	assert(!chdir(".."));
  	assert(!rmdir(dname));
  
  	return 0;
  }
  
  #else
  
  SKIP_MAIN_UNDEFINED("__NR_getdents")
  
  #endif
  