1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
|
/* Test program for POSIX shm_* functions.
Copyright (C) 2000-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
/* We want to see output immediately. */
#define STDOUT_UNBUFFERED
static void
worker (int write_now)
{
struct timespec ts;
struct stat64 st;
int i;
int fd = shm_open ("/glibc-shm-test", O_RDWR, 0600);
if (fd == -1)
error (EXIT_FAILURE, 0, "failed to open shared memory object: shm_open");
char *mem;
if (fd == -1)
exit (fd);
if (fstat64 (fd, &st) == -1)
error (EXIT_FAILURE, 0, "stat failed");
if (st.st_size != 4000)
error (EXIT_FAILURE, 0, "size incorrect");
mem = mmap (NULL, 4000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (mem == MAP_FAILED)
error (EXIT_FAILURE, 0, "mmap failed");
ts.tv_sec = 0;
ts.tv_nsec = 500000000;
if (write_now)
for (i = 0; i <= 4; ++i)
mem[i] = i;
else
/* Wait until the first bytes of the memory region are 0, 1, 2, 3, 4. */
while (1)
{
for (i = 0; i <= 4; ++i)
if (mem[i] != i)
break;
if (i > 4)
/* OK, that's done. */
break;
nanosleep (&ts, NULL);
}
if (!write_now)
for (i = 0; i <= 4; ++i)
mem[i] = 4 + i;
else
/* Wait until the first bytes of the memory region are 4, 5, 6, 7, 8. */
while (1)
{
for (i = 0; i <= 4; ++i)
if (mem[i] != 4 + i)
break;
if (i > 4)
/* OK, that's done. */
break;
nanosleep (&ts, NULL);
}
if (munmap (mem, 4000) == -1)
error (EXIT_FAILURE, errno, "munmap");
close (fd);
exit (0);
}
static int
do_test (void)
{
int fd;
pid_t pid1;
pid_t pid2;
int status1;
int status2;
struct stat64 st;
fd = shm_open ("/../escaped", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
if (fd != -1)
{
perror ("read file outside of SHMDIR directory");
return 1;
}
/* Create the shared memory object. */
fd = shm_open ("/glibc-shm-test", O_RDWR | O_CREAT | O_TRUNC | O_EXCL, 0600);
if (fd == -1)
{
/* If shm_open is unimplemented we skip the test. */
if (errno == ENOSYS)
{
perror ("shm_open unimplemented. Test skipped.");
return 0;
}
else
error (EXIT_FAILURE, 0, "failed to create shared memory object: shm_open");
}
/* Size the object. We make it 4000 bytes long. */
if (ftruncate (fd, 4000) == -1)
{
/* This failed. Must be a bug in the implementation of the
shared memory itself. */
perror ("failed to size of shared memory object: ftruncate");
close (fd);
shm_unlink ("/glibc-shm-test");
return 0;
}
if (fstat64 (fd, &st) == -1)
{
shm_unlink ("/glibc-shm-test");
error (EXIT_FAILURE, 0, "initial stat failed");
}
if (st.st_size != 4000)
{
shm_unlink ("/glibc-shm-test");
error (EXIT_FAILURE, 0, "initial size not correct");
}
/* Spawn to processes which will do the work. */
pid1 = fork ();
if (pid1 == 0)
worker (0);
else if (pid1 == -1)
{
/* Couldn't create a second process. */
perror ("fork");
close (fd);
shm_unlink ("/glibc-shm-test");
return 0;
}
pid2 = fork ();
if (pid2 == 0)
worker (1);
else if (pid2 == -1)
{
/* Couldn't create a second process. */
int ignore;
perror ("fork");
kill (pid1, SIGTERM);
waitpid (pid1, &ignore, 0);
close (fd);
shm_unlink ("/glibc-shm-test");
return 0;
}
/* Wait until the two processes are finished. */
waitpid (pid1, &status1, 0);
waitpid (pid2, &status2, 0);
/* Now we can unlink the shared object. */
shm_unlink ("/glibc-shm-test");
return (!WIFEXITED (status1) || WEXITSTATUS (status1) != 0
|| !WIFEXITED (status2) || WEXITSTATUS (status2) != 0);
}
static void
cleanup_handler (void)
{
shm_unlink ("/glibc-shm-test");
}
#define CLEANUP_HANDLER cleanup_handler
#include <support/test-driver.c>
|