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/*
* safe_io.h - Wrapper around read and write
*
* Copyright (C) 2001, 2002, 2003, 2007 Brailcom, o.p.s.
*
* This 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 software 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, see <https://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <errno.h>
#ifdef TEMP_FAILURE_RETRY /* GNU libc */
#define safe_read(fd, buf, count) TEMP_FAILURE_RETRY(read(fd, buf, count))
#define safe_write(fd, buf, count) TEMP_FAILURE_RETRY(write(fd, buf, count))
#else /* TEMP_FAILURE_RETRY */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
static inline ssize_t safe_read(int fd, void *buf, size_t count)
{
do {
ssize_t w = read(fd, buf, count);
if (w == -1 && errno == EINTR)
continue;
return w;
} while (1);
}
static inline ssize_t safe_write(int fd, const void *buf, size_t count)
{
do {
ssize_t w = write(fd, buf, count);
if (w == -1 && errno == EINTR)
continue;
return w;
} while (1);
}
#endif /* TEMP_FAILURE_RETRY */
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