1/* unistd.h related helpers.
2 Copyright (C) 2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _UNISTD_EXT_H
20#define _UNISTD_EXT_H
21
22#include <error.h>
23#include <errno.h>
24#include <libintl.h>
25#include <unistd.h>
26
27/* Helpers used in catgets/gencat.c and malloc/memusage*.c */
28static inline void
29write_all (int fd, const void *buffer, size_t length)
30{
31 const char *p = buffer;
32 const char *end = p + length;
33 while (p < end)
34 {
35 ssize_t ret = write (fd, p, end - p);
36 if (ret < 0)
37 error (EXIT_FAILURE, errno,
38 gettext ("write of %zu bytes failed after %td: %m"),
39 length, p - (const char *) buffer);
40
41 if (ret == 0)
42 error (EXIT_FAILURE, 0,
43 gettext ("write returned 0 after writing %td bytes of %zu"),
44 p - (const char *) buffer, length);
45 p += ret;
46 }
47}
48
49static inline void
50read_all (int fd, void *buffer, size_t length)
51{
52 char *p = buffer;
53 char *end = p + length;
54 while (p < end)
55 {
56 ssize_t ret = read (fd, p, end - p);
57 if (ret < 0)
58 error (EXIT_FAILURE, errno,
59 gettext ("read of %zu bytes failed after %td: %m"),
60 length, p - (char *) buffer);
61
62 p += ret;
63 }
64}
65
66#endif
67