102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*
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* Check printing of character/block device numbers in -yy mode.
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*
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* Copyright (c) 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 <stdio.h>
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#include <unistd.h>
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#include <asm/unistd.h>
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#include <linux/fcntl.h>
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#include <sys/sysmacros.h>
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#if defined __NR_openat && defined O_PATH
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int
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main(void)
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{
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static const struct {
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const char *path;
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unsigned int major;
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unsigned int minor;
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bool blk;
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bool optional;
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} checks[] = {
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{ "/dev/zero", 1, 5, false, false },
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{ "/dev/full", 1, 7, false, false },
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{ "/dev/sda", 8, 0, true, true },
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};
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for (unsigned int i = 0; i < ARRAY_SIZE(checks); i++) {
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/*
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* We can't have nice things here and call openat() directly as
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* some libcs (yes, musl, I'm looking at you now) are too
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* frivolous in passing flags to the kernel.
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*/
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long fd = syscall(__NR_openat, AT_FDCWD, checks[i].path,
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O_RDONLY|O_PATH);
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printf("openat(AT_FDCWD, \"%s\", O_RDONLY|O_PATH) = %s",
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checks[i].path, sprintrc(fd));
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if (fd >= 0)
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printf("<%s<%s %u:%u>>",
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checks[i].path,
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checks[i].blk ? "block" : "char",
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checks[i].major, checks[i].minor);
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puts("");
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if (fd < 0) {
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if (checks[i].optional)
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continue;
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else
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perror_msg_and_fail("openat(\"%s\")",
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checks[i].path);
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}
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int rc = fsync(fd);
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printf("fsync(%ld<%s<%s %u:%u>>) = %s\n",
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fd, checks[i].path, checks[i].blk ? "block" : "char",
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checks[i].major, checks[i].minor, sprintrc(rc));
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close(fd);
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}
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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_openat && O_PATH")
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#endif
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