Mercurial > gnulib
view lib/safe-read.h @ 40198:5a34193cbc07
long-options: add parse_gnu_standard_options_only
Discussed in https://bugs.gnu.org/33468 .
* lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead
of 0.
(parse_gnu_standard_options_only): Add function to
process the GNU default options --help and --version and fail for any other
unknown long or short option. See
https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html .
* lib/long-options.h (parse_gnu_standard_options_only): Declare it.
* modules/long-options (depends-on): Add stdbool, exitfail.
* top/maint.mk (sc_prohibit_long_options_without_use): Update
syntax-check rule, add new function name.
author | Bernhard Voelker <mail@bernhard-voelker.de> |
---|---|
date | Thu, 29 Nov 2018 09:06:26 +0100 |
parents | b06060465f09 |
children |
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/* An interface to read() that retries after interrupts. Copyright (C) 2002, 2006, 2009-2019 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 3 of the License, 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, see <https://www.gnu.org/licenses/>. */ /* Some system calls may be interrupted and fail with errno = EINTR in the following situations: - The process is stopped and restarted (signal SIGSTOP and SIGCONT, user types Ctrl-Z) on some platforms: Mac OS X. - The process receives a signal for which a signal handler was installed with sigaction() with an sa_flags field that does not contain SA_RESTART. - The process receives a signal for which a signal handler was installed with signal() and for which no call to siginterrupt(sig,0) was done, on some platforms: AIX, HP-UX, IRIX, OSF/1, Solaris. This module provides a wrapper around read() that handles EINTR. */ #include <stddef.h> #ifdef __cplusplus extern "C" { #endif #define SAFE_READ_ERROR ((size_t) -1) /* Read up to COUNT bytes at BUF from descriptor FD, retrying if interrupted. Return the actual number of bytes read, zero for EOF, or SAFE_READ_ERROR upon error. */ extern size_t safe_read (int fd, void *buf, size_t count); #ifdef __cplusplus } #endif