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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* Read block from given position in file without changing file pointer.
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POSIX version.
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Copyright (C) 1997-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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/* Note: This implementation of pread64 is not multithread-safe. */
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ssize_t
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__libc_pread64 (int fd, void *buf, size_t nbyte, off64_t offset)
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{
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/* Since we must not change the file pointer preserve the value so that
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we can restore it later. */
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int save_errno;
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ssize_t result;
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off64_t old_offset = __libc_lseek64 (fd, 0, SEEK_CUR);
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if (old_offset == (off64_t) -1)
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return -1;
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/* Set to wanted position. */
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if (__libc_lseek64 (fd, offset, SEEK_SET) == (off64_t) -1)
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return -1;
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/* Write out the data. */
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result = __libc_read (fd, buf, nbyte);
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/* Now we have to restore the position. If this fails we have to
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return this as an error. But if the writing also failed we
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return this error. */
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save_errno = errno;
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if (__libc_lseek64 (fd, old_offset, SEEK_SET) == (off64_t) -1)
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{
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if (result == -1)
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__set_errno (save_errno);
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return -1;
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}
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__set_errno (save_errno);
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return result;
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}
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#ifndef __libc_pread64
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weak_alias (__libc_pread64, __pread64)
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libc_hidden_weak (__pread64)
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weak_alias (__libc_pread64, pread64)
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#endif
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