1  /*
       2   * Check decoding of mknodat syscall.
       3   *
       4   * Copyright (c) 2016-2021 The strace developers.
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include "scno.h"
      12  
      13  #include <stdio.h>
      14  #include <sys/stat.h>
      15  #include <sys/sysmacros.h>
      16  #include <unistd.h>
      17  
      18  static const char sample[] = "mknodat_sample";
      19  static const long int fd = (long int) 0xdeadbeefffffffffULL;
      20  
      21  static long
      22  call_mknodat(unsigned short mode, unsigned long dev)
      23  {
      24  	unsigned long lmode = (unsigned long) 0xffffffffffff0000ULL | mode;
      25  	return syscall(__NR_mknodat, fd, sample, lmode, dev);
      26  }
      27  
      28  int
      29  main(void)
      30  {
      31  	unsigned long dev = (unsigned long) 0xdeadbeefbadc0dedULL;
      32  
      33  	long rc = call_mknodat(0, dev);
      34  	printf("mknodat(-1, \"%s\", 000) = %ld %s (%m)\n",
      35  	       sample, rc, errno2name());
      36  
      37  	rc = call_mknodat(0xffff, dev);
      38  	printf("mknodat(-1, \"%s\", %#03ho) = %ld %s (%m)\n",
      39  	       sample, (unsigned short) -1, rc, errno2name());
      40  
      41  	rc = call_mknodat(S_IFREG, 0);
      42  	printf("mknodat(-1, \"%s\", S_IFREG|000) = %ld %s (%m)\n",
      43  	       sample, rc, errno2name());
      44  
      45  	rc = call_mknodat(S_IFDIR | 06, 0);
      46  	printf("mknodat(-1, \"%s\", S_IFDIR|006) = %ld %s (%m)\n",
      47  	       sample, rc, errno2name());
      48  
      49  	rc = call_mknodat(S_IFLNK | 060, 0);
      50  	printf("mknodat(-1, \"%s\", S_IFLNK|060) = %ld %s (%m)\n",
      51  	       sample, rc, errno2name());
      52  
      53  	rc = call_mknodat(S_IFIFO | 0600, 0);
      54  	printf("mknodat(-1, \"%s\", S_IFIFO|0600) = %ld %s (%m)\n",
      55  	       sample, rc, errno2name());
      56  
      57  	dev = (unsigned long) 0xdeadbeef00000000ULL | makedev(1, 7);
      58  
      59  	rc = call_mknodat(S_IFCHR | 024, dev);
      60  	printf("mknodat(-1, \"%s\", S_IFCHR|024, makedev(0x1, 0x7)) = %ld %s (%m)\n",
      61  	       sample, rc, errno2name());
      62  
      63  	const unsigned short mode = (0xffff & ~S_IFMT) | S_IFBLK;
      64  	dev = (unsigned long) 0xdeadbeefbadc0dedULL;
      65  
      66  	rc = call_mknodat(mode, dev);
      67  	printf("mknodat(-1, \"%s\", S_IFBLK|S_ISUID|S_ISGID|S_ISVTX|%#03ho"
      68  	       ", makedev(%#x, %#x)) = %ld %s (%m)\n",
      69  	       sample, (short) (mode & ~(S_IFMT|S_ISUID|S_ISGID|S_ISVTX)),
      70  	       major((unsigned) dev), minor((unsigned) dev),
      71  	       rc, errno2name());
      72  
      73  	puts("+++ exited with 0 +++");
      74  	return 0;
      75  }