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/* unistd.h related helpers.
Copyright (C) 2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _UNISTD_EXT_H
#define _UNISTD_EXT_H
#include <error.h>
#include <errno.h>
#include <libintl.h>
#include <unistd.h>
/* Helpers used in catgets/gencat.c and malloc/memusage*.c */
static inline void
write_all (int fd, const void *buffer, size_t length)
{
const char *p = buffer;
const char *end = p + length;
while (p < end)
{
ssize_t ret = write (fd, p, end - p);
if (ret < 0)
error (EXIT_FAILURE, errno,
gettext ("write of %zu bytes failed after %td: %m"),
length, p - (const char *) buffer);
if (ret == 0)
error (EXIT_FAILURE, 0,
gettext ("write returned 0 after writing %td bytes of %zu"),
p - (const char *) buffer, length);
p += ret;
}
}
static inline void
read_all (int fd, void *buffer, size_t length)
{
char *p = buffer;
char *end = p + length;
while (p < end)
{
ssize_t ret = read (fd, p, end - p);
if (ret < 0)
error (EXIT_FAILURE, errno,
gettext ("read of %zu bytes failed after %td: %m"),
length, p - (char *) buffer);
p += ret;
}
}
#endif
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