110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
|
|
* flushbuf.c - flush a buffer
|
|
*/
|
|
/* $Header$ */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include "loc_incl.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
off_t _lseek(int fildes, off_t offset, int whence);
|
|
int _write(int d, const char *buf, int nbytes);
|
|
int _isatty(int d);
|
|
extern void (*_clean)(void);
|
|
|
|
int
|
|
__flushbuf(int c, FILE * stream)
|
|
{
|
|
_clean = __cleanup;
|
|
if (fileno(stream) < 0) return EOF;
|
|
if (!io_testflag(stream, _IOWRITE)) return EOF;
|
|
if (io_testflag(stream, _IOREADING) && !feof(stream)) return EOF;
|
|
|
|
stream->_flags &= ~_IOREADING;
|
|
stream->_flags |= _IOWRITING;
|
|
if (!io_testflag(stream, _IONBF)) {
|
|
if (!stream->_buf) {
|
|
if (stream == stdout && _isatty(fileno(stdout))) {
|
|
if (!(stream->_buf =
|
|
(unsigned char *) malloc(BUFSIZ))) {
|
|
stream->_flags |= _IONBF;
|
|
} else {
|
|
stream->_flags |= _IOLBF;
|
|
stream->_bufsiz = BUFSIZ;
|
|
stream->_count = -1;
|
|
}
|
|
} else {
|
|
if (!(stream->_buf =
|
|
(unsigned char *) malloc(BUFSIZ))) {
|
|
stream->_flags |= _IONBF;
|
|
} else {
|
|
stream->_flags |= _IOMYBUF;
|
|
stream->_bufsiz = BUFSIZ;
|
|
if (!io_testflag(stream, _IOLBF))
|
|
stream->_count = BUFSIZ - 1;
|
|
}
|
|
}
|
|
stream->_ptr = stream->_buf;
|
|
}
|
|
}
|
|
|
|
if (io_testflag(stream, _IONBF)) {
|
|
char c1 = c;
|
|
|
|
stream->_count = 0;
|
|
if (io_testflag(stream, _IOAPPEND)) {
|
|
if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
}
|
|
}
|
|
if (_write(fileno(stream), &c1, 1) != 1) {
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
}
|
|
return c;
|
|
} else if (io_testflag(stream, _IOLBF)) {
|
|
*stream->_ptr++ = c;
|
|
if (c == '\n' || stream->_count == -stream->_bufsiz) {
|
|
if (io_testflag(stream, _IOAPPEND)) {
|
|
if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
}
|
|
}
|
|
if (_write(fileno(stream), (char *)stream->_buf,
|
|
-stream->_count) != -stream->_count) {
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
} else {
|
|
stream->_ptr = stream->_buf;
|
|
stream->_count = 0;
|
|
}
|
|
}
|
|
} else {
|
|
int count = stream->_ptr - stream->_buf;
|
|
|
|
stream->_count = stream->_bufsiz - 1;
|
|
stream->_ptr = stream->_buf + 1;
|
|
|
|
if (count > 0) {
|
|
if (io_testflag(stream, _IOAPPEND)) {
|
|
if (_lseek(fileno(stream), 0L, SEEK_END) == -1) {
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
}
|
|
}
|
|
if (_write(fileno(stream), (char *)stream->_buf, count)
|
|
!= count) {
|
|
*(stream->_buf) = c;
|
|
stream->_flags |= _IOERR;
|
|
return EOF;
|
|
}
|
|
}
|
|
*(stream->_buf) = c;
|
|
}
|
|
return c;
|
|
}
|