Fossil

int file_islink(const char *zFilename){
  return file_perm(zFilename, RepoFILE)==PERM_LNK;
}

/*
** Check every sub-directory of zRoot along the path to zFile.
** If any sub-directory is really an ordinary file or a symbolic link,
** return an integer which is the length of the prefix of zFile which
** is the name of that object.  Return 0 if all no non-directory
** objects are found along the path.
**
** Example:  Given inputs
**
**     zRoot = /home/alice/project1
**     zFile = /home/alice/project1/main/src/js/fileA.js
**
** Look for objects in the following order:
**
**      /home/alice/project/main
**      /home/alice/project/main/src
**      /home/alice/project/main/src/js
**
** If any of those objects exist and are something other than a directory
** then return the length of the name of the first non-directory object
** seen.
*/
int file_nondir_objects_on_path(const char *zRoot, const char *zFile){
  int i = (int)strlen(zRoot);
  char *z = fossil_strdup(zFile);
  assert( fossil_strnicmp(zRoot, z, i)==0 );
  if( i && zRoot[i-1]=='/' ) i--;
  while( z[i]=='/' ){
    int j, rc;
    for(j=i+1; z[j] && z[j]!='/'; j++){}
    if( z[j]!='/' ) break;
    z[j] = 0;
    rc = file_isdir(z, SymFILE);
    if( rc!=1 ){
      if( rc==2 ){
        fossil_free(z);
        return j;
      }
      break;
    }
    z[j] = '/';
    i = j;
  }
  fossil_free(z);
  return 0;
}

/*
** Return 1 if zFilename is a directory.  Return 0 if zFilename
** does not exist.  Return 2 if zFilename exists but is something
** other than a directory.
*/