From 685ac06eef12d077777b5cac60e23d6123b9cf84 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Mon, 6 Jan 2003 13:08:59 +0000 Subject: [PATCH] . --- lib/full-read.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++ lib/full-read.h | 24 ++++++++++++++++++ 2 files changed, 89 insertions(+) create mode 100644 lib/full-read.c create mode 100644 lib/full-read.h diff --git a/lib/full-read.c b/lib/full-read.c new file mode 100644 index 0000000000..a328588ca5 --- /dev/null +++ b/lib/full-read.c @@ -0,0 +1,65 @@ +/* An interface to read() that reads all it is asked to read. + + Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001, 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 + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, read to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#if HAVE_CONFIG_H +# include +#endif + +/* Specification. */ +#include "full-read.h" + +#include +#ifndef errno +extern int errno; +#endif + +#include "safe-read.h" + +/* Read COUNT bytes at BUF to descriptor FD, retrying if interrupted + or if partial reads occur. Return the number of bytes successfully + read, setting errno if that is less than COUNT. errno = 0 means EOF. */ +size_t +full_read (int fd, void *buf, size_t count) +{ + size_t total_read = 0; + + if (count > 0) + { + char *ptr = buf; + + do + { + size_t nread = safe_read (fd, ptr, count); + if (nread == (size_t)-1) + break; + if (nread == 0) + { + /* EOF. */ + errno = 0; + break; + } + total_read += nread; + ptr += nread; + count -= nread; + } + while (count > 0); + } + + return total_read; +} diff --git a/lib/full-read.h b/lib/full-read.h new file mode 100644 index 0000000000..71f19a3bd2 --- /dev/null +++ b/lib/full-read.h @@ -0,0 +1,24 @@ +/* An interface to read() that reads all it is asked to read. + + 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 + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, read to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include + +/* Read COUNT bytes at BUF to descriptor FD, retrying if interrupted + or if partial reads occur. Return the number of bytes successfully + read, setting errno if that is less than COUNT. errno = 0 means EOF. */ +extern size_t full_read (int fd, void *buf, size_t count); -- 2.47.2