git/compat/access.c

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#define COMPAT_CODE_ACCESS
#include "../git-compat-util.h"
/* Do the same thing access(2) does, but use the effective uid,
* and don't make the mistake of telling root that any file is
* executable. This version uses stat(2).
*/
int git_access(const char *path, int mode)
{
struct stat st;
/* do not interfere a normal user */
if (geteuid())
return access(path, mode);
if (stat(path, &st) < 0)
return -1;
/* Root can read or write any file. */
if (!(mode & X_OK))
return 0;
/* Root can execute any file that has any one of the execute
* bits set.
*/
if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
return 0;
errno = EACCES;
return -1;
}