thodg/libgit2/src/map.c

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• Hash : 1736799d
  Author :
  Date : 2012-03-12T23:06:31
  

  Add map.c with shared p_mmap param validation
  
  Forgot to add this file in the previous commit
  

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• src/map.c

• /*
   * Copyright (C) 2009-2012 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #include <git2/common.h>
  #include "map.h"
  
  int validate_map_args(
  	git_map *out, size_t len, int prot, int flags, int fd, git_off_t offset)
  {
  	GIT_UNUSED(fd);
  	GIT_UNUSED(offset);
  
  	if (out == NULL || len == 0) {
  		errno = EINVAL;
  		giterr_set(GITERR_OS, "Failed to mmap. No map or zero length");
  		return -1;
  	}
  
  	if (!(prot & GIT_PROT_WRITE) && !(prot & GIT_PROT_READ)) {
  		errno = EINVAL;
  		giterr_set(GITERR_OS, "Failed to mmap. Invalid protection parameters");
  		return -1;
  	}
  
  	if (flags & GIT_MAP_FIXED) {
  		errno = EINVAL;
  		giterr_set(GITERR_OS, "Failed to mmap. FIXED not set");
  		return -1;
  	}
  
  	return 0;
  }
  
  

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