11714Smckusick /* Copyright (c) 1979 Regents of the University of California */ 21714Smckusick 3*2224Smckusic static char sccsid[] = "@(#)UNSYNC.c 1.2 01/24/81"; 41714Smckusick 51714Smckusick #include "h00vars.h" 61714Smckusick #include "h01errs.h" 71714Smckusick 81714Smckusick /* 91714Smckusick * push back last char read to prepare for formatted read 101714Smckusick */ 111714Smckusick UNSYNC(curfile) 121714Smckusick 131714Smckusick register struct iorec *curfile; 141714Smckusick { 151714Smckusick if (curfile->funit & FWRITE) { 161714Smckusick ERROR(EREADIT, curfile->pfname); 171714Smckusick return; 181714Smckusick } 19*2224Smckusic if (curfile->funit & EOFF) { 20*2224Smckusic ERROR(EPASTEOF, curfile->pfname); 21*2224Smckusic return; 22*2224Smckusic } 231714Smckusick if ((curfile->funit & SYNC) == 0) { 241714Smckusick ungetc(*curfile->fileptr, curfile->fbuf); 251714Smckusick } 261714Smckusick } 27