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- /* full-write.c -- an interface to write that retries after interrupts
- Copyright (C) 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Copied largely from GNU C's cccp.c.
- */
-
- #ifdef HAVE_CONFIG_H
- #if defined (CONFIG_BROKETS)
- /* We use <config.h> instead of "config.h" so that a compilation
- using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
- (which it would do because it found this file in $srcdir). */
- #include <config.h>
- #else
- #include "config.h"
- #endif
- #endif
-
- #include <sys/types.h>
-
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
-
- #include <errno.h>
- #ifndef STDC_HEADERS
- extern int errno;
- #endif
-
- /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
- Return LEN upon success, write's (negative) error code otherwise. */
-
- int
- full_write (desc, ptr, len)
- int desc;
- char *ptr;
- int len;
- {
- int total_written;
-
- total_written = 0;
- while (len > 0)
- {
- int written = write (desc, ptr, len);
- if (written < 0)
- {
- #ifdef EINTR
- if (errno == EINTR)
- continue;
- #endif
- return written;
- }
- total_written += written;
- ptr += written;
- len -= written;
- }
- return total_written;
- }
-