1 /* safe-read.c -- an interface to read that retries after interrupts
2 Copyright (C) 1993, 1994 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <sys/types.h>
34 /* Read LEN bytes at PTR from descriptor DESC, for file FILENAME,
35 retrying if necessary. Return a negative value if an error occurs,
36 otherwise return the actual number of bytes read,
37 which must be LEN unless end-of-file was reached. */
39 The canonical source for this function is in the gcc distribution
40 in file cccp.c. So don't make any changes here. */
43 safe_read (desc, ptr, len)
50 int nchars = read (desc, ptr, left);