Mercurial > hg > octave-lojdl > gnulib-hg
changeset 4057:9d51dd8de223
Simply #define SAFE_WRITE and include safe-read.c.
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Wed, 04 Dec 2002 08:03:16 +0000 |
parents | 9294b143dc83 |
children | 34e1ed5a6a10 |
files | lib/safe-write.c |
diffstat | 1 files changed, 3 insertions(+), 67 deletions(-) [+] |
line wrap: on
line diff
--- a/lib/safe-write.c +++ b/lib/safe-write.c @@ -1,5 +1,5 @@ /* An interface to write that retries after interrupts. - Copyright (C) 1993, 1994, 1998, 2002 Free Software Foundation, Inc. + Copyright (C) 2002 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -15,69 +15,5 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#if HAVE_CONFIG_H -# include <config.h> -#endif - -/* Specification. */ -#include "safe-write.h" - -/* Get ssize_t. */ -#include <sys/types.h> -#if HAVE_UNISTD_H -# include <unistd.h> -#endif - -#include <errno.h> -#ifndef errno -extern int errno; -#endif - -#ifdef EINTR -# define IS_EINTR(x) ((x) == EINTR) -#else -# define IS_EINTR(x) 0 -#endif - -#include <limits.h> - -#ifndef CHAR_BIT -# define CHAR_BIT 8 -#endif - -/* The extra casts work around common compiler bugs. */ -#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) -/* The outer cast is needed to work around a bug in Cray C 5.0.3.0. - It is necessary at least when t == time_t. */ -#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \ - ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0)) -#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t))) - -#ifndef INT_MAX -# define INT_MAX TYPE_MAXIMUM (int) -#endif - -/* Write up to COUNT bytes at BUF to descriptor FD, retrying if interrupted. - Return the actual number of bytes written, zero for EOF, or SAFE_WRITE_ERROR - upon error. */ -size_t -safe_write (int fd, const void *buf, size_t count) -{ - ssize_t result; - - /* POSIX limits COUNT to SSIZE_MAX, but we limit it further, requiring - that COUNT <= INT_MAX, to avoid triggering a bug in Tru64 5.1. - When decreasing COUNT, keep the file pointer block-aligned. - Note that in any case, write may succeed, yet write fewer than COUNT - bytes, so the caller must be prepared to handle partial results. */ - if (count > INT_MAX) - count = INT_MAX & ~8191; - - do - { - result = write (fd, buf, count); - } - while (result < 0 && IS_EINTR (errno)); - - return (size_t) result; -} +#define SAFE_WRITE +#include "safe-read.c"