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Add map.c with shared p_mmap param validation

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Forgot to add this file in the previous commit
This commit is contained in:
Russell Belfer 2012-03-12 23:06:31 -07:00
parent e1de726c15
commit 1736799d2a
1 changed files with 36 additions and 0 deletions
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36
src/map.c Normal file
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@ -0,0 +1,36 @@
/*
* 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;
}