From: Paul Eggert Date: Mon, 9 Jun 1997 22:22:27 +0000 (+0000) Subject: Initial revision X-Git-Url: https://git.brokenzipper.com/gitweb?a=commitdiff_plain;h=41c4811c30566909d4c66fd3d063686b05c32c9b;p=chaz%2Ftar Initial revision --- diff --git a/lib/full-read.c b/lib/full-read.c new file mode 100644 index 0000000..1c6ead8 --- /dev/null +++ b/lib/full-read.c @@ -0,0 +1,60 @@ +/* full-read.c -- an interface to read that retries after interrupts + Copyright (C) 1993, 1994, 1997 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, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#if HAVE_CONFIG_H +# include +#endif + +#include + +#if HAVE_UNISTD_H +# include +#endif + +#include +#ifndef errno +extern int errno; +#endif + +/* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. + Return the actual number of bytes read, zero for EOF, or negative + for an error. */ + +int +full_read (desc, ptr, len) + int desc; + char *ptr; + size_t len; +{ + int n_chars; + + if (len <= 0) + return len; + +#ifdef EINTR + do + { + n_chars = read (desc, ptr, len); + } + while (n_chars < 0 && errno == EINTR); +#else + n_chars = read (desc, ptr, len); +#endif + + return n_chars; +}