__private_extern__ int __srefill1(FILE *fp) { fp->_p = fp->_bf._base; fp->_r = _sread(fp, (char *)fp->_p, fp->_bf._size); fp->_flags &= ~__SMOD; /* buffer contents are again pristine */ if (fp->_r <= 0) { if (fp->_r == 0) fp->_flags |= __SEOF; else { fp->_r = 0; fp->_flags |= __SERR; } return (EOF); } return (0); }
/* * Refill a stdio buffer. * Return EOF on eof or error, 0 otherwise. */ int __srefill(FILE *fp) { /* make sure stdio is set up */ if (!__sdidinit) __sinit(); ORIENT(fp, -1); fp->_r = 0; /* largely a convenience for callers */ /* SysV does not make this test; take it out for compatibility */ if (fp->_flags & __SEOF) return (EOF); /* if not already reading, have to be reading and writing */ if ((fp->_flags & __SRD) == 0) { if ((fp->_flags & __SRW) == 0) { errno = EBADF; fp->_flags |= __SERR; return (EOF); } /* switch to reading */ if (fp->_flags & __SWR) { if (__sflush(fp)) return (EOF); fp->_flags &= ~__SWR; fp->_w = 0; fp->_lbfsize = 0; } fp->_flags |= __SRD; } else { /* * We were reading. If there is an ungetc buffer, * we must have been reading from that. Drop it, * restoring the previous buffer (if any). If there * is anything in that buffer, return. */ if (HASUB(fp)) { FREEUB(fp); if ((fp->_r = fp->_ur) != 0) { fp->_p = fp->_up; return (0); } } } if (fp->_bf._base == NULL) __smakebuf(fp); /* * Before reading from a line buffered or unbuffered file, * flush all line buffered output files, per the ANSI C * standard. */ if (fp->_flags & (__SLBF|__SNBF)) { /* Ignore this file in _fwalk to avoid potential deadlock. */ fp->_flags |= __SIGN; (void) _fwalk(lflush); fp->_flags &= ~__SIGN; /* Now flush this file without locking it. */ if ((fp->_flags & (__SLBF|__SWR)) == (__SLBF|__SWR)) __sflush(fp); } fp->_p = fp->_bf._base; fp->_r = _sread(fp, (char *)fp->_p, fp->_bf._size); fp->_flags &= ~__SMOD; /* buffer contents are again pristine */ if (fp->_r <= 0) { if (fp->_r == 0) fp->_flags |= __SEOF; else { fp->_r = 0; fp->_flags |= __SERR; } return (EOF); } return (0); }