update from main archive 961208cvs/libc-961209

Mon Dec  9 03:39:30 1996  Ulrich Drepper  <drepper@cygnus.com>

	* config.make.in (defines): Add @USE_NEW_MALLOC@.
	* Makefile.in: Define USE_NEW_MALLOC to -DUSE_NEW_MALLOC if
	we use the new malloc.

	* malloc.h: Use either <malloc/malloc.h> or <new-malloc/malloc.h>
	depending on USE_NEW_MALLOC.

	Fix some more POSIX.1 problems.
	* libio/fileops.c (_IO_file_underflow): Set errno to EBADF if used
	on a write-only stream.
	(_IO_file_overflow): Set errno to EBADF if used on a read-only
	stream.
	(_IO_file_seekoff): POSIX.1 requires that fseek() after an fflush()
	call really positions the file offset to the correct position
	and no read-ahead happens.

	* locale/C-monetary.c: Set mon_grouping file to "" and "\377"
	to pass POSIX test suite.
	* stdio-common/vfprintf.c: Handle empty string as grouping command
	correctly.
	* stdlib/grouping.h: Likewise.

	* misc/syslog.c: Case first argument of __libc_cleanup_region_start.

	* signal/sigsetops.h: Update copyright.  Don't include ansidecl.h.

	* stdio-common/printf_fp.c: Update copyright.

Sun Dec  8 16:39:28 1996  Andreas Jaeger  <aj@arthur.pfalz.de>

	* time/Makefile: Compile ap.c with NO_MCHECK flag if new-malloc
	used (not otherwise).

	* misc/syslog.c (vsyslog): Cast argument to __libc_cleanup_region
	to get Hurd macros right.

1 files changed, 14 insertions, 3 deletions

diff --git a/libio/fileops.c b/libio/fileops.c
index ce0e2bb524..b5026e167a 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -269,7 +269,10 @@ DEFUN(_IO_file_underflow, (fp),
 #endif
 
   if (fp->_flags & _IO_NO_READS)
-    return EOF;
+    {
+      __set_errno (EBADF);
+      return EOF;
+    }
   if (fp->_IO_read_ptr < fp->_IO_read_end)
     return *(unsigned char*)fp->_IO_read_ptr;
 
@@ -308,7 +311,10 @@ DEFUN(_IO_file_overflow, (f, ch),
       register _IO_FILE* f AND int ch)
 {
   if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
-    return EOF;
+    {
+      __set_errno (EBADF);
+      return EOF;
+    }
   /* If currently reading or no buffer allocated. */
   if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0)
     {
@@ -387,6 +393,10 @@ DEFUN(_IO_file_seekoff, (fp, offset, dir, mode),
   _IO_pos_t result;
   _IO_off_t delta, new_offset;
   long count;
+  /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
+     offset of the underlying file must be exact.  */
+  int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end
+		       && fp->_IO_write_base == fp->_IO_write_ptr);
 
   if (mode == 0)
     dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
@@ -503,7 +513,8 @@ DEFUN(_IO_file_seekoff, (fp, offset, dir, mode),
   else
     {
       count = _IO_SYSREAD (fp, fp->_IO_buf_base,
-			   fp->_IO_buf_end - fp->_IO_buf_base);
+			   (must_be_exact
+			    ? delta : fp->_IO_buf_end - fp->_IO_buf_base));
       if (count < delta)
 	{
 	  /* We weren't allowed to read, but try to seek the remainder. */