/*
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* Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
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* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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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 <asm/unistd.h>
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#ifdef __NR_readlinkat
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# include <stdio.h>
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# include <unistd.h>
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# define PREFIX "test.readlinkat"
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# define TARGET (PREFIX ".target")
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# define LINKPATH (PREFIX ".link")
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int
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main(void)
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{
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const char * const fname = tail_memdup(LINKPATH, sizeof(LINKPATH));
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const char * const hex_fname =
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hexquote_strndup(fname, sizeof(LINKPATH) - 1);
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const unsigned int size = sizeof(TARGET) - 1;
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char * const buf = tail_alloc(size);
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(void) unlink(fname);
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long rc = syscall(__NR_readlinkat, -100, fname, buf, size);
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printf("readlinkat(AT_FDCWD, \"%s\", %p, %u) = -1 ENOENT (%m)\n",
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hex_fname, buf, size);
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if (symlink(TARGET, fname))
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perror_msg_and_fail("symlink");
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rc = syscall(__NR_readlinkat, -100, fname, buf, size);
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if (rc < 0) {
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perror("readlinkat");
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(void) unlink(fname);
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return 77;
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}
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const char * const hex_buf = hexquote_strndup(buf, size);
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printf("readlinkat(AT_FDCWD, \"%s\", \"%s\", %u) = %u\n",
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hex_fname, hex_buf, size, size);
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if (unlink(fname))
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perror_msg_and_fail("unlink");
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_readlink")
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#endif
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