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2002-02-25  Jakub Jelinek  <jakub@redhat.com>

	* libio/iofopen.c (__fopen_maybe_mmap): Set the initial
	position to fp->_offset if it is set.
	* stdio-common/Makefile (tests): Add tst-fdopen.
	* stdio-common/tst-fdopen.c: New test.

2002-02-25  Jakub Jelinek  <jakub@redhat.com>

	* libio/fileops.c (_IO_file_xsgetn_mmap): Handle reading from backup.
	* stdio-common/tst-ungetc.c (main): Add another test.
This commit is contained in:
Ulrich Drepper
2002-02-26 05:23:31 +00:00
parent 77fe0b9cd8
commit b39d571990
6 changed files with 116 additions and 13 deletions
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12
libio/iofopen.c
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@ -53,7 +53,9 @@ __fopen_maybe_mmap (fp)
if (_IO_SYSSTAT (fp, &st) == 0
&& S_ISREG (st.st_mode) && st.st_size != 0
/* Limit the file size to 1MB for 32-bit machines. */
&& (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024))
&& (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)
/* Sanity check. */
&& (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size))
{
/* Try to map the file. */
void *p;
@ -72,15 +74,17 @@ __fopen_maybe_mmap (fp)
underflow functions which never tries to read
anything from the file. */
INTUSE(_IO_setb) (fp, p, (char *) p + st.st_size, 0);
_IO_setg (fp, p, p, p);
if (fp->_offset == _IO_pos_BAD)
fp->_offset = 0;
_IO_setg (fp, p, p + fp->_offset, p + fp->_offset);
if (fp->_mode <= 0)
_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap;
else
_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps_mmap;
fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap;
fp->_offset = 0;
}
}
}