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  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #include "tests.h"
  10 #include <asm/unistd.h>
  11
  12 #ifdef __NR_getdents64
  13
  14 # include <assert.h>
  15 # include <dirent.h>
  16 # include <fcntl.h>
  17 # include <inttypes.h>
  18 # include <stddef.h>
  19 # include <stdio.h>
  20 # include <sys/stat.h>
  21 # include <unistd.h>
  22
  23 static const char fname[] =
  24         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  25         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  26         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  27         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  28         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  29         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  30         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\n"
  31         "A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nZ";
  32 static const char qname[] =
  33         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  34         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  35         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  36         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  37         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  38         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  39         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\n"
  40         "A\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nA\\nZ";
  41
  42 typedef struct {
  43                 uint64_t d_ino;
  44                 uint64_t d_off;
  45                 unsigned short d_reclen;
  46                 unsigned char d_type;
  47                 char d_name[256];
  48 } kernel_dirent64;
  49
  50 static char buf[8192];
  51
  52 static const char *
  53 str_d_type(const unsigned char d_type)
  54 {
  55         switch (d_type) {
  56                 case DT_DIR:
  57                         return "DT_DIR";
  58                 case DT_REG:
  59                         return "DT_REG";
  60                 default:
  61                         return "DT_UNKNOWN";
  62         }
  63 }
  64 static void
  65 print_dirent(const kernel_dirent64 *d)
  66 {
  67         const unsigned int d_name_offset = offsetof(kernel_dirent64, d_name);
  68         int d_name_len = d->d_reclen - d_name_offset;
  69         assert(d_name_len > 0);
  70
  71         printf("{d_ino=%" PRIu64 ", d_off=%" PRId64
  72                ", d_reclen=%u, d_type=%s, d_name=",
  73                d->d_ino, d->d_off, d->d_reclen, str_d_type(d->d_type));
  74
  75         if (d->d_name[0] == '.')
  76                 printf("\"%.*s\"}", d_name_len, d->d_name);
  77         else
  78                 printf("\"%s\"}", qname);
  79 }
  80
  81 int
  82 main(void)
  83 {
  84         static const char dname[] = "getdents64.test.tmp.dir";
  85
  86         assert(!mkdir(dname, 0700));
  87         assert(!chdir(dname));
  88         (void) close(0);
  89         assert(!creat(fname, 0600));
  90         assert(!close(0));
  91         assert(!open(".", O_RDONLY | O_DIRECTORY));
  92
  93         unsigned long count = (unsigned long) 0xfacefeeddeadbeefULL;
  94         long rc = syscall(__NR_getdents64, (long) 0xdefacedffffffffULL, NULL,
  95                           count);
  96         printf("getdents64(-1, NULL, %u) = %ld %s (%m)\n",
  97                (unsigned) count, rc, errno2name());
  98
  99         count = (unsigned long) 0xfacefeed00000000ULL | sizeof(buf);
 100         while ((rc = syscall(__NR_getdents64, 0, buf, count))) {
 101                 kernel_dirent64 *d;
 102                 long i;
 103
 104                 if (rc < 0)
 105                         perror_msg_and_skip("getdents64");
 106                 printf("getdents64(0, [");
 107                 for (i = 0; i < rc; i += d->d_reclen) {
 108                         d = (kernel_dirent64 *) &buf[i];
 109                         if (i)
 110                                 printf(", ");
 111                         print_dirent(d);
 112                 }
 113                 printf("], %u) = %ld\n", (unsigned) count, rc);
 114         }
 115         printf("getdents64(0, [], %u) = 0\n", (unsigned) count);
 116         puts("+++ exited with 0 +++");
 117         assert(!unlink(fname));
 118         assert(!chdir(".."));
 119         assert(!rmdir(dname));
 120
 121         return 0;
 122 }
 123
 124 #else
 125
 126 SKIP_MAIN_UNDEFINED("__NR_getdents64")
 127
 128 #endif