62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/*
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* Copyright (c) 2015 Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>
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* Copyright (c) 2015-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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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_readlink
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# include <stdio.h>
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# include <unistd.h>
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# define PREFIX "test.readlink"
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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_readlink, fname, buf, size);
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printf("readlink(\"%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_readlink, fname, buf, size);
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if (rc < 0) {
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perror("readlink");
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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("readlink(\"%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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