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

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