compat/access.c

   1 #define COMPAT_CODE_ACCESS
   2 #include "../git-compat-util.h"
   3
   4 /* Do the same thing access(2) does, but use the effective uid,
   5  * and don't make the mistake of telling root that any file is
   6  * executable.  This version uses stat(2).
   7  */
   8 int git_access(const char *path, int mode)
   9 {
  10         struct stat st;
  11
  12         /* do not interfere a normal user */
  13         if (geteuid())
  14                 return access(path, mode);
  15
  16         if (stat(path, &st) < 0)
  17                 return -1;
  18
  19         /* Root can read or write any file. */
  20         if (!(mode & X_OK))
  21                 return 0;
  22
  23         /* Root can execute any file that has any one of the execute
  24          * bits set.
  25          */
  26         if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
  27                 return 0;
  28
  29         errno = EACCES;
  30         return -1;
  31 }