mirror of
https://github.com/ceph/ceph
synced 2024-12-22 19:34:30 +00:00
9f81048606
Fixes: http://tracker.ceph.com/issues/19883 (Partially) Signed-off-by: Jos Collin <jcollin@redhat.com>
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2011 New Dream Network
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*
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* This 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 version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_SAFE_IO
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#define CEPH_SAFE_IO
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#include "common/compiler_extensions.h"
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#include <sys/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Safe functions wrapping the raw read() and write() libc functions.
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* These retry on EINTR, and on error return -errno instead of returning
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* -1 and setting errno).
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*/
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ssize_t safe_read(int fd, void *buf, size_t count)
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WARN_UNUSED_RESULT;
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ssize_t safe_write(int fd, const void *buf, size_t count)
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WARN_UNUSED_RESULT;
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ssize_t safe_pread(int fd, void *buf, size_t count, off_t offset)
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WARN_UNUSED_RESULT;
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ssize_t safe_pwrite(int fd, const void *buf, size_t count, off_t offset)
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WARN_UNUSED_RESULT;
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#ifdef CEPH_HAVE_SPLICE
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/*
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* Similar to the above (non-exact version) and below (exact version).
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* See splice(2) for parameter descriptions.
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*/
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ssize_t safe_splice(int fd_in, off_t *off_in, int fd_out, off_t *off_out,
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size_t len, unsigned int flags)
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WARN_UNUSED_RESULT;
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ssize_t safe_splice_exact(int fd_in, off_t *off_in, int fd_out,
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off_t *off_out, size_t len, unsigned int flags)
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WARN_UNUSED_RESULT;
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#endif
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/*
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* Same as the above functions, but return -EDOM unless exactly the requested
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* number of bytes can be read.
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*/
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ssize_t safe_read_exact(int fd, void *buf, size_t count)
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WARN_UNUSED_RESULT;
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ssize_t safe_pread_exact(int fd, void *buf, size_t count, off_t offset)
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WARN_UNUSED_RESULT;
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/*
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* Safe functions to read and write an entire file.
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*/
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int safe_write_file(const char *base, const char *file,
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const char *val, size_t vallen);
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int safe_read_file(const char *base, const char *file,
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char *val, size_t vallen);
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#ifdef __cplusplus
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}
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#endif
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#endif
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