?? safe-read.c
字號:
/* safe-read.c -- an interface to read that retries after interrupts Copyright (C) 1993, 1994, 1998 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 2, 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */#if HAVE_CONFIG_H# include <config.h>#endif#include <sys/types.h>#if HAVE_UNISTD_H# include <unistd.h>#endif#include <errno.h>#ifndef errnoextern int errno;#endif#include "safe-read.h"/* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. Return the actual number of bytes read, zero for EOF, or negative for an error. */ssize_tsafe_read (int desc, void *ptr, size_t len){ ssize_t n_chars; if (len <= 0) return len;#ifdef EINTR do { n_chars = read (desc, ptr, len); } while (n_chars < 0 && errno == EINTR);#else n_chars = read (desc, ptr, len);#endif return n_chars;}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -