granicus.if.org Git - strace/blob - tests/getdents64.c

   1 /*
   2  * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2015-2017 The strace developers.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "tests.h"
  30 #include <asm/unistd.h>
  31
  32 #ifdef __NR_getdents64
  33
  34 # include <assert.h>
  35 # include <dirent.h>
  36 # include <fcntl.h>
  37 # include <inttypes.h>
  38 # include <stddef.h>
  39 # include <stdio.h>
  40 # include <sys/stat.h>
  41 # include <unistd.h>
  42
  43 static const char fname[] =
  44         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  45         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  46         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  47         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  48         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  49         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  50         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  51         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nZ";
  52 static const char qname[] =
  53         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  54         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  55         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  56         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  57         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  58         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  59         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  60         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nZ";
  61
  62 typedef struct {
  63                 uint64_t d_ino;
  64                 uint64_t d_off;
  65                 unsigned short d_reclen;
  66                 unsigned char d_type;
  67                 char d_name[256];
  68 } kernel_dirent64;
  69
  70 static char buf[8192];
  71
  72 static const char *
  73 str_d_type(const unsigned char d_type)
  74 {
  75         switch (d_type) {
  76                 case DT_DIR:
  77                         return "DT_DIR";
  78                 case DT_REG:
  79                         return "DT_REG";
  80                 default:
  81                         return "DT_UNKNOWN";
  82         }
  83 }
  84 static void
  85 print_dirent(const kernel_dirent64 *d)
  86 {
  87         const unsigned int d_name_offset = offsetof(kernel_dirent64, d_name);
  88         int d_name_len = d->d_reclen - d_name_offset;
  89         assert(d_name_len > 0);
  90
  91         printf("{d_ino=%" PRIu64 ", d_off=%" PRId64
  92                ", d_reclen=%u, d_type=%s, d_name=",
  93                d->d_ino, d->d_off, d->d_reclen, str_d_type(d->d_type));
  94
  95         if (d->d_name[0] == '.')
  96                 printf("\"%.*s\"}", d_name_len, d->d_name);
  97         else
  98                 printf("\"%s\"}", qname);
  99 }
 100
 101 int
 102 main(void)
 103 {
 104         static const char dname[] = "getdents64.test.tmp.dir";
 105
 106         assert(!mkdir(dname, 0700));
 107         assert(!chdir(dname));
 108         (void) close(0);
 109         assert(!creat(fname, 0600));
 110         assert(!close(0));
 111         assert(!open(".", O_RDONLY | O_DIRECTORY));
 112
 113         unsigned long count = (unsigned long) 0xfacefeeddeadbeefULL;
 114         long rc = syscall(__NR_getdents64, (long) 0xdefacedffffffffULL, NULL,
 115                           count);
 116         printf("getdents64(-1, NULL, %u) = %ld %s (%m)\n",
 117                (unsigned) count, rc, errno2name());
 118
 119         count = (unsigned long) 0xfacefeed00000000ULL | sizeof(buf);
 120         while ((rc = syscall(__NR_getdents64, 0, buf, count))) {
 121                 kernel_dirent64 *d;
 122                 long i;
 123
 124                 if (rc < 0)
 125                         perror_msg_and_skip("getdents64");
 126                 printf("getdents64(0, [");
 127                 for (i = 0; i < rc; i += d->d_reclen) {
 128                         d = (kernel_dirent64 *) &buf[i];
 129                         if (i)
 130                                 printf(", ");
 131                         print_dirent(d);
 132                 }
 133                 printf("], %u) = %ld\n", (unsigned) count, rc);
 134         }
 135         printf("getdents64(0, [], %u) = 0\n", (unsigned) count);
 136         puts("+++ exited with 0 +++");
 137         assert(!unlink(fname));
 138         assert(!chdir(".."));
 139         assert(!rmdir(dname));
 140
 141         return 0;
 142 }
 143
 144 #else
 145
 146 SKIP_MAIN_UNDEFINED("__NR_getdents64")
 147
 148 #endif