Access give file accessibility access char *fname int perm Access returns 0 if the access modes specified in "perm" are correct for the user to access "fname". -1 is returned if the file cannot be accessed. The value for "perm" may be any legal OS-9 mode as used for "open()" or "creat()", it may be zero, which tests whether the file exists, or the path to it may be searched. NOTE that the "perm" value is not compatible with other systems. The appropiate error indication, if a value of -1 is returned, may be found in "errno".