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2007-03-15 Eric Blake <ebb9@byu.net>

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* libc/stdio/local.h (cantwrite, FREEUB, FREELB): Make reentrant.
	(__smakebuf): Rename...
	(__smakebuf_r): to this.
	* libc/stdio/fvwrite.h (__swsetup_r): Rename, from __swsetup.
	* libc/stdio/makebuf.c (__smakebuf): Detect failed asprint
	allocation, then rename...
	(__smakebuf_r): ...to this and fix reentrancy.
	* libc/stdio/wsetup.c (__swsetup): Detect failed asprintf
	allocation, then rename...
	(__swsetup_r): ...to this and fix reentrancy.
	* libc/stdio/fseek.c (_fseek_r): Fix reentrancy.
	* libc/stdio/refill.c (__srefill_r): Likewise.
	* libc/stdio/fclose.c (_fclose_r): Likewise.
	* libc/stdio/fread.c (_fread_r): Likewise.
	* libc/stdio/freopen.c (_freopen_r): Likewise.
	* libc/stdio/wbuf.c (__swbuf_r): Likewise.
	* libc/stdio64/fseeko64.c (_fseeko64_r): Likewise.
	* libc/stdio/fvwrite.c (__sfvwrite_r): Set errno properly on
	failed asprintf allocation, and fix reentrancy.
	* libc/stdio/snprintf.c (snprintf, _snprintf_r): Report overflow,
	as required by POSIX.
	* libc/stdio/sniprintf.c (sniprintf, _sniprintf_r): Likewise.
	* libc/stdio/vsnprintf.c (vsnprintf, _vsnprintf_r): Likewise.
	* libc/stdio/vsniprintf.c (vsniprintf, _vsniprintf_r): Likewise.
This commit is contained in:
Jeff Johnston
2007-03-15 18:40:48 +00:00
parent e96d068ed3
commit 14ba5e14d9
17 changed files with 151 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
newlib/ChangeLog
View File

@@ -1,3 +1,30 @@
2007-03-15 Eric Blake <ebb9@byu.net>
* libc/stdio/local.h (cantwrite, FREEUB, FREELB): Make reentrant.
(__smakebuf): Rename...
(__smakebuf_r): to this.
* libc/stdio/fvwrite.h (__swsetup_r): Rename, from __swsetup.
* libc/stdio/makebuf.c (__smakebuf): Detect failed asprint
allocation, then rename...
(__smakebuf_r): ...to this and fix reentrancy.
* libc/stdio/wsetup.c (__swsetup): Detect failed asprintf
allocation, then rename...
(__swsetup_r): ...to this and fix reentrancy.
* libc/stdio/fseek.c (_fseek_r): Fix reentrancy.
* libc/stdio/refill.c (__srefill_r): Likewise.
* libc/stdio/fclose.c (_fclose_r): Likewise.
* libc/stdio/fread.c (_fread_r): Likewise.
* libc/stdio/freopen.c (_freopen_r): Likewise.
* libc/stdio/wbuf.c (__swbuf_r): Likewise.
* libc/stdio64/fseeko64.c (_fseeko64_r): Likewise.
* libc/stdio/fvwrite.c (__sfvwrite_r): Set errno properly on
failed asprintf allocation, and fix reentrancy.
* libc/stdio/snprintf.c (snprintf, _snprintf_r): Report overflow,
as required by POSIX.
* libc/stdio/sniprintf.c (sniprintf, _sniprintf_r): Likewise.
* libc/stdio/vsnprintf.c (vsnprintf, _vsnprintf_r): Likewise.
* libc/stdio/vsniprintf.c (vsniprintf, _vsniprintf_r): Likewise.
2007-03-12 Eric Blake <ebb9@byu.net>
* libc/stdio/fvwrite.c (__sfvwrite_r): Fix reentrancy.

7
newlib/libc/stdio/fclose.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -95,9 +95,9 @@ _DEFUN(_fclose_r, (rptr, fp),
if (fp->_flags & __SMBF)
_free_r (rptr, (char *) fp->_bf._base);
if (HASUB (fp))
FREEUB (fp);
FREEUB (rptr, fp);
if (HASLB (fp))
FREELB (fp);
FREELB (rptr, fp);
fp->_flags = 0; /* release this FILE for reuse */
_funlockfile (fp);
#ifndef __SINGLE_THREAD__
@@ -119,4 +119,3 @@ _DEFUN(fclose, (fp),
}
#endif

4
newlib/libc/stdio/fread.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -168,7 +168,7 @@ _DEFUN(_fread_r, (ptr, buf, size, count, fp),
/* If still more data needed, free any allocated ungetc buffer. */
if (HASUB (fp) && resid > 0)
FREEUB (fp);
FREEUB (ptr, fp);
/* Finally read directly into user's buffer if needed. */
while (resid > 0)

6
newlib/libc/stdio/freopen.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990, 2006 The Regents of the University of California.
* Copyright (c) 1990, 2006, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -196,10 +196,10 @@ _DEFUN(_freopen_r, (ptr, file, mode, fp),
fp->_bf._size = 0;
fp->_lbfsize = 0;
if (HASUB (fp))
FREEUB (fp);
FREEUB (ptr, fp);
fp->_ub._size = 0;
if (HASLB (fp))
FREELB (fp);
FREELB (ptr, fp);
fp->_lb._size = 0;
if (f < 0)

10
newlib/libc/stdio/fseek.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -213,7 +213,7 @@ _DEFUN(_fseek_r, (ptr, fp, offset, whence),
*/
if (fp->_bf._base == NULL)
__smakebuf (fp);
__smakebuf_r (ptr, fp);
if (fp->_flags & (__SWR | __SRW | __SNBF | __SNPT))
goto dumb;
if ((fp->_flags & __SOPT) == 0)
@@ -307,7 +307,7 @@ _DEFUN(_fseek_r, (ptr, fp, offset, whence),
fp->_p = fp->_bf._base + o;
fp->_r = n - o;
if (HASUB (fp))
FREEUB (fp);
FREEUB (ptr, fp);
fp->_flags &= ~__SEOF;
_funlockfile (fp);
return 0;
@@ -328,7 +328,7 @@ _DEFUN(_fseek_r, (ptr, fp, offset, whence),
fp->_r = 0;
fp->_p = fp->_bf._base;
if (HASUB (fp))
FREEUB (fp);
FREEUB (ptr, fp);
fp->_flags &= ~__SEOF;
n = target - curoff;
if (n)
@@ -354,7 +354,7 @@ dumb:
}
/* success: clear EOF indicator and discard ungetc() data */
if (HASUB (fp))
FREEUB (fp);
FREEUB (ptr, fp);
fp->_p = fp->_bf._base;
fp->_r = 0;
/* fp->_w = 0; *//* unnecessary (I think...) */

4
newlib/libc/stdio/fvwrite.c
View File

@@ -60,7 +60,7 @@ _DEFUN(__sfvwrite_r, (ptr, fp, uio),
return 0;
/* make sure we can write */
if (cantwrite (fp))
if (cantwrite (ptr, fp))
{
fp->_flags |= __SERR;
ptr->_errno = EBADF;
@@ -147,6 +147,8 @@ _DEFUN(__sfvwrite_r, (ptr, fp, uio),
{
/* Free buffer which is no longer used. */
_free_r (ptr, fp->_bf._base);
/* Ensure correct errno, even if free changed it. */
ptr->_errno = ENOMEM;
goto err;
}
fp->_bf._base = str;

6
newlib/libc/stdio/fvwrite.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -33,6 +33,4 @@ struct __suio {
extern int _EXFUN(__sfvwrite_r,(struct _reent *, FILE *, struct __suio *));
extern int _EXFUN(__swsetup,(FILE *));
extern int _EXFUN(__swsetup_r,(struct _reent *, FILE *));

15
newlib/libc/stdio/local.h
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -41,7 +41,7 @@ extern int _EXFUN(__sclose,(_PTR));
extern int _EXFUN(__stextmode,(int));
extern _VOID _EXFUN(__sinit,(struct _reent *));
extern _VOID _EXFUN(_cleanup_r,(struct _reent *));
extern _VOID _EXFUN(__smakebuf,(FILE *));
extern _VOID _EXFUN(__smakebuf_r,(struct _reent *, FILE *));
extern int _EXFUN(_fwalk,(struct _reent *, int (*)(FILE *)));
extern int _EXFUN(_fwalk_reent,(struct _reent *, int (*)(struct _reent *, FILE *)));
struct _glue * _EXFUN(__sfmoreglue,(struct _reent *,int n));
@@ -82,24 +82,25 @@ struct _glue * _EXFUN(__sfmoreglue,(struct _reent *,int n));
/* Return true iff the given FILE cannot be written now. */
#define cantwrite(fp) \
#define cantwrite(ptr, fp) \
((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
__swsetup(fp))
__swsetup_r(ptr, fp))
/* Test whether the given stdio file has an active ungetc buffer;
release such a buffer, without restoring ordinary unread data. */
#define HASUB(fp) ((fp)->_ub._base != NULL)
#define FREEUB(fp) { \
#define FREEUB(ptr, fp) { \
if ((fp)->_ub._base != (fp)->_ubuf) \
_free_r(_REENT, (char *)(fp)->_ub._base); \
_free_r(ptr, (char *)(fp)->_ub._base); \
(fp)->_ub._base = NULL; \
}
/* Test for an fgetline() buffer. */
#define HASLB(fp) ((fp)->_lb._base != NULL)
#define FREELB(fp) { _free_r(_REENT,(char *)(fp)->_lb._base); (fp)->_lb._base = NULL; }
#define FREELB(ptr, fp) { _free_r(ptr,(char *)(fp)->_lb._base); \
(fp)->_lb._base = NULL; }
/* WARNING: _dcvt is defined in the stdlib directory, not here! */

16
newlib/libc/stdio/makebuf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -35,7 +35,8 @@
*/
_VOID
_DEFUN(__smakebuf, (fp),
_DEFUN(__smakebuf_r, (ptr, fp),
struct _reent *ptr _AND
register FILE *fp)
{
register size_t size, couldbetty;
@@ -49,9 +50,9 @@ _DEFUN(__smakebuf, (fp),
return;
}
#ifdef __USE_INTERNAL_STAT64
if (fp->_file < 0 || _fstat64_r (_REENT, fp->_file, &st) < 0)
if (fp->_file < 0 || _fstat64_r (ptr, fp->_file, &st) < 0)
#else
if (fp->_file < 0 || _fstat_r (_REENT, fp->_file, &st) < 0)
if (fp->_file < 0 || _fstat_r (ptr, fp->_file, &st) < 0)
#endif
{
couldbetty = 0;
@@ -87,15 +88,18 @@ _DEFUN(__smakebuf, (fp),
else
fp->_flags |= __SNPT;
}
if ((p = _malloc_r (_REENT, size)) == NULL)
if ((p = _malloc_r (ptr, size)) == NULL)
{
if (!(fp->_flags & __SSTR))
{
fp->_flags |= __SNBF;
fp->_bf._base = fp->_p = fp->_nbuf;
fp->_bf._size = 1;
}
}
else
{
_REENT->__cleanup = _cleanup_r;
ptr->__cleanup = _cleanup_r;
fp->_flags |= __SMBF;
fp->_bf._base = fp->_p = (unsigned char *) p;
fp->_bf._size = size;

8
newlib/libc/stdio/refill.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -43,7 +43,7 @@ _DEFUN(__srefill_r, (ptr, fp),
{
/* make sure stdio is set up */
CHECK_INIT (_REENT, fp);
CHECK_INIT (ptr, fp);
fp->_r = 0; /* largely a convenience for callers */
@@ -83,7 +83,7 @@ _DEFUN(__srefill_r, (ptr, fp),
*/
if (HASUB (fp))
{
FREEUB (fp);
FREEUB (ptr, fp);
if ((fp->_r = fp->_ur) != 0)
{
fp->_p = fp->_up;
@@ -93,7 +93,7 @@ _DEFUN(__srefill_r, (ptr, fp),
}
if (fp->_bf._base == NULL)
__smakebuf (fp);
__smakebuf_r (ptr, fp);
/*
* Before reading from a line buffered or unbuffered file,

20
newlib/libc/stdio/sniprintf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -26,6 +26,7 @@
#include <varargs.h>
#endif
#include <limits.h>
#include <errno.h>
#include "local.h"
int
@@ -48,6 +49,11 @@ _sniprintf_r (ptr, str, size, fmt, va_alist)
va_list ap;
FILE f;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
@@ -59,6 +65,8 @@ _sniprintf_r (ptr, str, size, fmt, va_alist)
#endif
ret = _vfiprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return (ret);
@@ -83,7 +91,13 @@ sniprintf (str, size, fmt, va_alist)
int ret;
va_list ap;
FILE f;
struct _reent *ptr = _REENT;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
@@ -93,8 +107,10 @@ sniprintf (str, size, fmt, va_alist)
#else
va_start (ap);
#endif
ret = _vfiprintf_r (_REENT, &f, fmt, ap);
ret = _vfiprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return (ret);

20
newlib/libc/stdio/snprintf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -26,6 +26,7 @@
#include <varargs.h>
#endif
#include <limits.h>
#include <errno.h>
#include "local.h"
int
@@ -48,6 +49,11 @@ _snprintf_r(ptr, str, size, fmt, va_alist)
va_list ap;
FILE f;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
@@ -59,6 +65,8 @@ _snprintf_r(ptr, str, size, fmt, va_alist)
#endif
ret = _vfprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return (ret);
@@ -83,7 +91,13 @@ snprintf(str, size, fmt, va_alist)
int ret;
va_list ap;
FILE f;
struct _reent *ptr = _REENT;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
@@ -93,8 +107,10 @@ snprintf(str, size, fmt, va_alist)
#else
va_start (ap);
#endif
ret = _vfprintf_r (_REENT, &f, fmt, ap);
ret = _vfprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return (ret);

2
newlib/libc/stdio/vfprintf.c
View File

@@ -544,7 +544,7 @@ _DEFUN(_VFPRINTF_R, (data, fp, fmt0, ap),
_flockfile (fp);
/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
if (cantwrite (fp)) {
if (cantwrite (data, fp)) {
_funlockfile (fp);
return (EOF);
}

20
newlib/libc/stdio/vsniprintf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -68,6 +68,7 @@ static char sccsid[] = "%W% (Berkeley) %G%";
#else
#include <varargs.h>
#endif
#include <errno.h>
#ifndef _REENT_ONLY
@@ -80,12 +81,20 @@ _DEFUN(vsniprintf, (str, size, fmt, ap),
{
int ret;
FILE f;
struct _reent *ptr = _REENT;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._file = -1; /* No file. */
ret = _vfiprintf_r (_REENT, &f, fmt, ap);
ret = _vfiprintf_r (ptr, &f, fmt, ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return ret;
@@ -104,11 +113,18 @@ _DEFUN(_vsniprintf_r, (ptr, str, size, fmt, ap),
int ret;
FILE f;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._file = -1; /* No file. */
ret = _vfiprintf_r (ptr, &f, fmt, ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return ret;

20
newlib/libc/stdio/vsnprintf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -29,6 +29,7 @@ static char sccsid[] = "%W% (Berkeley) %G%";
#else
#include <varargs.h>
#endif
#include <errno.h>
#ifndef _REENT_ONLY
@@ -41,12 +42,20 @@ _DEFUN(vsnprintf, (str, size, fmt, ap),
{
int ret;
FILE f;
struct _reent *ptr = _REENT;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._file = -1; /* No file. */
ret = _vfprintf_r (_REENT, &f, fmt, ap);
ret = _vfprintf_r (ptr, &f, fmt, ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return ret;
@@ -65,11 +74,18 @@ _DEFUN(_vsnprintf_r, (ptr, str, size, fmt, ap),
int ret;
FILE f;
if (size > INT_MAX)
{
ptr->_errno = EOVERFLOW;
return EOF;
}
f._flags = __SWR | __SSTR;
f._bf._base = f._p = (unsigned char *) str;
f._bf._size = f._w = (size > 0 ? size - 1 : 0);
f._file = -1; /* No file. */
ret = _vfprintf_r (ptr, &f, fmt, ap);
if (ret < EOF)
ptr->_errno = EOVERFLOW;
if (size > 0)
*f._p = 0;
return ret;

4
newlib/libc/stdio/wbuf.c
View File

@@ -1,5 +1,5 @@
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -53,7 +53,7 @@ _DEFUN(__swbuf_r, (ptr, c, fp),
*/
fp->_w = fp->_lbfsize;
if (cantwrite (fp))
if (cantwrite (ptr, fp))
{
fp->_flags |= __SERR;
ptr->_errno = EBADF;

11
newlib/libc/stdio/wsetup.c
View File

@@ -1,7 +1,7 @@
/* No user fns here. Pesch 15apr92. */
/*
* Copyright (c) 1990 The Regents of the University of California.
* Copyright (c) 1990, 2007 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
@@ -29,7 +29,8 @@
*/
int
_DEFUN(__swsetup, (fp),
_DEFUN(__swsetup_r, (ptr, fp),
struct _reent *ptr _AND
register FILE * fp)
{
/* Make sure stdio is set up. */
@@ -48,7 +49,7 @@ _DEFUN(__swsetup, (fp),
{
/* clobber any ungetc data */
if (HASUB (fp))
FREEUB (fp);
FREEUB (ptr, fp);
fp->_flags &= ~(__SRD | __SEOF);
fp->_r = 0;
fp->_p = fp->_bf._base;
@@ -63,7 +64,7 @@ _DEFUN(__swsetup, (fp),
*/
if (fp->_bf._base == NULL
&& (!(fp->_flags & __SSTR) || (fp->_flags & __SMBF)))
__smakebuf (fp);
__smakebuf_r (ptr, fp);
if (fp->_flags & __SLBF)
{
@@ -78,5 +79,5 @@ _DEFUN(__swsetup, (fp),
else
fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size;
return 0;
return (!fp->_bf._base && (fp->_flags & __SMBF)) ? EOF : 0;
}