thodg/libgit2/src/os/unix.c

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• Hash : 3e9e6909
  Author :
  Date : 2008-11-03T17:14:25
  

  Redefine git_fread, git_fwrite to transfer the whole unit We never want to accept a short read or a short write when transferring data to or from a local file. Either the entire read (or write) completes or the operation failed and we will not recover gracefully from it. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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• src/os/unix.c

• /*
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2,
   * as published by the Free Software Foundation.
   *
   * In addition to the permissions in the GNU General Public License,
   * the authors give you unlimited permission to link the compiled
   * version of this file into combinations with other programs,
   * and to distribute those combinations without any restriction
   * coming from the use of this file.  (The General Public License
   * restrictions do apply in other respects; for example, they cover
   * modification of the file, and distribution when not linked into
   * a combined executable.)
   *
   * 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
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; see the file COPYING.  If not, write to
   * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #include <errno.h>
  #include "git/common.h"
  
  int git_fopen(git_file *out, const char *path, int flags)
  {
  	int r = open(path, flags);
  	if (r < 0)
  		return -1;
  	*out = r;
  	return GIT_SUCCESS;
  }
  
  int git_fread(git_file fd, void *buf, size_t cnt)
  {
  	char *b = buf;
  	while (cnt) {
  		ssize_t r = read(fd, b, cnt);
  		if (r < 0) {
  			if (errno == EINTR || errno == EAGAIN)
  				continue;
  			return -1;
  		}
  		if (!r) {
  			errno = EPIPE;
  			return -1;
  		}
  		cnt -= r;
  		b += r;
  	}
  	return GIT_SUCCESS;
  }
  
  int git_fwrite(git_file fd, void *buf, size_t cnt)
  {
  	char *b = buf;
  	while (cnt) {
  		ssize_t r = write(fd, b, cnt);
  		if (r < 0) {
  			if (errno == EINTR || errno == EAGAIN)
  				continue;
  			return -1;
  		}
  		if (!r) {
  			errno = EPIPE;
  			return -1;
  		}
  		cnt -= r;
  		b += r;
  	}
  	return GIT_SUCCESS;
  }
  

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