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It makes sense to try to dump the argument of write syscalls as they can
be readily available despite the fact that error has been returned.
* syscall.c (dumpio): Move check for syserror and check for fd in
read_set to the end of the function.
* tests/read-write.c: Add a check for this behaviour.
* tests/pread64-pwrite64.c: Update expected output.
* NEWS: Mention this.
Suggested-by: J. Bruce Fields <bfields@fieldses.org>
Closes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=436284
* tests/gen_tests.in (pread64-pwrite64): New entry.
* tests/pread64-pwrite64.c: (main): Skip the test if /proc/self/fd/
is not available.
* tests/pread64-pwrite64.test: Remove.
* tests/Makefile.am (DECODER_TESTS): Remove pread64-pwrite64.test.
Do not assume that pwrite64 syscall fails when only part of the
specified memory buffer is accessible. With some kernels, one
accessible byte at the end of page is enough for pwrite64 syscall
to return 1.
* tests/pread64-pwrite64.c (main): Tweak the test that can lead
to a partial write.
* tests/pread64-pwrite64.c (dump_str, print_hex, test_dump):
New functions.
(main): Use them to test dumping of various data.
* tests/pread64-pwrite64.test: Update.
