From: Ben Gras <ben@minix3.org>
Date: Thu, 2 Feb 2006 16:59:07 +0000 (+0000)
Subject: . use proper S_ISFIFO for ISFIFO check
X-Git-Tag: v3.1.2a~395
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch01.html?a=commitdiff_plain;h=a3bda44a41c419a1904d38c0fc00b39f5ba105d3;p=minix.git

. use proper S_ISFIFO for ISFIFO check
. ignore ESPIPE error from lseek() in fflush() on read streams
  (because fifo's aren't detected when stdin, stdout or stderr)
---

diff --git a/lib/stdio/fflush.c b/lib/stdio/fflush.c
index ce058570d..b154609d0 100755
--- a/lib/stdio/fflush.c
+++ b/lib/stdio/fflush.c
@@ -5,6 +5,7 @@
 
 #include	<sys/types.h>
 #include	<stdio.h>
+#include	<errno.h>
 #include	"loc_incl.h"
 
 ssize_t _write(int d, const char *buf, size_t nbytes);
@@ -36,10 +37,12 @@ fflush(FILE *stream)
 		if (stream->_buf && !io_testflag(stream,_IONBF))
 			adjust = -stream->_count;
 		stream->_count = 0;
-		if (_lseek(fileno(stream), (off_t) adjust, SEEK_CUR) == -1) {
+		if (_lseek(fileno(stream), (off_t) adjust, SEEK_CUR) == -1 &&
+		  errno != ESPIPE) {
 			stream->_flags |= _IOERR;
 			return EOF;
 		}
+		errno = 0;
 		if (io_testflag(stream, _IOWRITE))
 			stream->_flags &= ~(_IOREADING | _IOWRITING);
 		stream->_ptr = stream->_buf;
diff --git a/lib/stdio/fopen.c b/lib/stdio/fopen.c
index 82663f599..777cc7a01 100755
--- a/lib/stdio/fopen.c
+++ b/lib/stdio/fopen.c
@@ -110,7 +110,7 @@ fopen(const char *name, const char *mode)
 		return (FILE *)NULL;
 	}
 	
-	if ( st.st_mode & S_IFIFO ) flags |= _IOFIFO;
+	if ( S_ISFIFO(st.st_mode) ) flags |= _IOFIFO;
 	
 	if (( stream = (FILE *) malloc(sizeof(FILE))) == NULL ) {
 		_close(fd);
diff --git a/lib/stdio/freopen.c b/lib/stdio/freopen.c
index a81137794..20a42505e 100755
--- a/lib/stdio/freopen.c
+++ b/lib/stdio/freopen.c
@@ -87,7 +87,7 @@ freopen(const char *name, const char *mode, FILE *stream)
 	}
 
 	if ( fstat( fd, &st ) == 0 ) {
-		if ( st.st_mode & S_IFIFO ) flags |= _IOFIFO;
+		if ( S_ISFIFO(st.st_mode) ) flags |= _IOFIFO;
 	} else {
 		goto loser;
 	}