* [PATCH] Don't parse %s format argument as multibyte string
@ 2010-08-31 10:29 Andreas Schwab
0 siblings, 0 replies; only message in thread
From: Andreas Schwab @ 2010-08-31 10:29 UTC (permalink / raw)
To: libc-hacker
The argument for the %s format is to be treated as an array of bytes.
Andreas.
2010-08-31 Andreas Schwab <schwab@redhat.com>
[BZ #6530]
* stdio-common/vfprintf.c (process_string_arg): Revert 2000-07-22
change.
---
stdio-common/vfprintf.c | 40 ++++------------------------------------
1 files changed, 4 insertions(+), 36 deletions(-)
diff --git a/stdio-common/vfprintf.c b/stdio-common/vfprintf.c
index 6e0e85c..bd2609e 100644
--- a/stdio-common/vfprintf.c
+++ b/stdio-common/vfprintf.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -1160,41 +1160,9 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
else if (!is_long && spec != L_('S')) \
{ \
if (prec != -1) \
- { \
- /* Search for the end of the string, but don't search past \
- the length (in bytes) specified by the precision. Also \
- don't use incomplete characters. */ \
- if (_NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_MB_CUR_MAX) == 1) \
- len = __strnlen (string, prec); \
- else \
- { \
- /* In case we have a multibyte character set the \
- situation is more complicated. We must not copy \
- bytes at the end which form an incomplete character. */\
- size_t ignore_size = (unsigned) prec > 1024 ? 1024 : prec;\
- wchar_t ignore[ignore_size]; \
- const char *str2 = string; \
- const char *strend = string + prec; \
- if (strend < string) \
- strend = (const char *) UINTPTR_MAX; \
- \
- mbstate_t ps; \
- memset (&ps, '\0', sizeof (ps)); \
- \
- while (str2 != NULL && str2 < strend) \
- if (__mbsnrtowcs (ignore, &str2, strend - str2, \
- ignore_size, &ps) == (size_t) -1) \
- { \
- done = -1; \
- goto all_done; \
- } \
- \
- if (str2 == NULL) \
- len = strlen (string); \
- else \
- len = str2 - string - (ps.__count & 7); \
- } \
- } \
+ /* Search for the end of the string, but don't search past \
+ the length (in bytes) specified by the precision. */ \
+ len = __strnlen (string, prec); \
else \
len = strlen (string); \
} \
--
1.7.2.2
--
Andreas Schwab, schwab@redhat.com
GPG Key fingerprint = D4E8 DBE3 3813 BB5D FA84 5EC7 45C6 250E 6F00 984E
"And now for something completely different."
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2010-08-31 10:29 [PATCH] Don't parse %s format argument as multibyte string Andreas Schwab
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