1 /* unistd.h related helpers.
2 Copyright (C) 2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
27 /* Helpers used in catgets/gencat.c and malloc/memusage*.c */
29 write_all (int fd
, const void *buffer
, size_t length
)
31 const char *p
= buffer
;
32 const char *end
= p
+ length
;
35 ssize_t ret
= write (fd
, p
, end
- p
);
37 error (EXIT_FAILURE
, errno
,
38 gettext ("write of %zu bytes failed after %td: %m"),
39 length
, p
- (const char *) buffer
);
42 error (EXIT_FAILURE
, 0,
43 gettext ("write returned 0 after writing %td bytes of %zu"),
44 p
- (const char *) buffer
, length
);
50 read_all (int fd
, void *buffer
, size_t length
)
53 char *end
= p
+ length
;
56 ssize_t ret
= read (fd
, p
, end
- p
);
58 error (EXIT_FAILURE
, errno
,
59 gettext ("read of %zu bytes failed after %td: %m"),
60 length
, p
- (char *) buffer
);