| /* An interface to read() that retries after interrupts. | |
| Copyright (C) 2002, 2006, 2009-2023 Free Software Foundation, Inc. | |
| This file 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. | |
| This file 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 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. */ | |
| extern "C" { | |
| /* 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); | |
| } | |