61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/*
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* This file is part of strace test suite.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2016-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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unsigned long
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inode_of_sockfd(const int fd)
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{
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assert(fd >= 0);
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char linkpath[sizeof("/proc/self/fd/%u") + sizeof(int) * 3];
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assert(snprintf(linkpath, sizeof(linkpath), "/proc/self/fd/%u", fd)
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< (int) sizeof(linkpath));
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char path[PATH_MAX + 1];
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const ssize_t path_len = readlink(linkpath, path, sizeof(path) - 1);
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if (path_len < 0)
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perror_msg_and_fail("readlink: %s", linkpath);
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path[path_len] = '\0';
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static const char prefix[] = "socket:[";
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const size_t prefix_len = sizeof(prefix) - 1;
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assert(strncmp(path, prefix, prefix_len) == 0
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&& path[path_len - 1] == ']');
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return strtoul(path + prefix_len, NULL, 10);
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}
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