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8 Commits

Author SHA1 Message Date
Yaakov Selkowitz c7ef9668cf stdio: remove TRAD_SYNOPSIS 
Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>
 2017-12-01 03:41:51 -06:00
Sebastian Huber 757c0871f7 Prevent use of uninitialized file lock 
The CHECK_INIT() is necessary before the _newlib_flockfile_start() since
this would use otherwise acquire an uninitialized lock which gets
initialized after this leading to a corrupt release.

newlib/ChangeLog
2015-07-01  Sebastian Huber  <sebastian.huber@embedded-brains.de>

	libc/stdio/fputs.c (_puts_r): Add missing CHECK_INIT().
	libc/stdio/gets.c (_gets_r): Add missing _REENT_SMALL_CHECK_INIT() and
	CHECK_INIT().  Use _stdin_r() to get the file pointer instead of stdin.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
 2015-07-02 09:38:06 +02:00
Corinna Vinschen 4aa28d8ae2 * libc/stdio/local.h (_newlib_flockfile_start): New macro to 
secure stream related critical section against thread cancellation.
	(_newlib_flockfile_exit): Ditto.
	(_newlib_sfp_lock_end): Ditto.
	(_newlib_sfp_lock_start): Ditto for the list of streams.
	(_newlib_sfp_lock_exit): Ditto.
	(_newlib_sfp_lock_end): Ditto.
	Use aforementioned macros in place of _flockfile/_funlockfile
	and __sfp_lock_acquire/__sfp_lock_release throughout the code.
	* libc/stdio/fclose.c: Explicitely disable and re-enable thread
	cancellation.  Explain why.
	* libc/stdio/freopen.c: Ditto.
	* libc/stdio64/freopen64.c: Ditto.
 2012-05-30 08:58:42 +00:00
Corinna Vinschen 656df313e0 * libc/stdio/fclose.c: Only use sfp lock to guard non-atomic 
changes of flags and fp lock.
	* libc/stdio/freopen.c: Ditto.
	* libc/stdio/freopen64.c: Ditto.
	* libc/stdio/fgetc.c: Revert change from 2009-04-24, remove sfp locks
	which guard entire function to avoid potential deadlocks when using
	stdio functions in multiple thraeds.
	* libc/stdio/fgets.c: Ditto.
	* libc/stdio/fgetwc.c: Ditto.
	* libc/stdio/fgetws.c: Ditto.
	* libc/stdio/fread.c: Ditto.
	* libc/stdio/fseek.c: Ditto.
	* libc/stdio/getc.c: Ditto.
	* libc/stdio/getdelim.c: Ditto.
	* libc/stdio/gets.c: Ditto.
	* libc/stdio/vfscanf.c: Ditto.
	* libc/stdio/vfwscanf.c: Ditto.

	* libc/stdio/fflush.c (_fflush_r): Split out core functionality into
	new function __sflush_r.  Just lock file and call __sflush_r from here.
	* libc/stdio/fwalk.c (_fwalk): Remove static helper function and move
	functionality back into main function. Don't walk a file with flags
	value of 1.  Add comment.
	(_fwalk_reent): Ditto.
	* libc/stdio/local.h (__sflush_r): Declare.
	* libc/stdio/refill.c (__srefill): Before calling fwalk, set flags
	value to 1 so this file pointer isn't walked.  Revert flags afterwards
	and call __sflush_r for this fp if necessary.  Add comments.
 2011-01-28 10:49:11 +00:00
Jeff Johnston bcde129400 2009-04-24 Jeff johnston <jjohnstn@redhat.com> 
* libc/stdio/fgetc.c: Make sure sfp lock is acquired before the
        file lock and released before the file lock to avoid a deadlock
        scenario.
        * libc/stdio/fgets.c: Ditto.
        * libc/stdio/fgetwc.c: Ditto.
        * libc/stdio/fgetws.c: Ditto.
        * libc/stdio/fread.c: Ditto.
        * libc/stdio/fseek.c: Ditto.
        * libc/stdio/getc.c: Ditto.
        * libc/stdio/getdelim.c: Ditto.
        * libc/stdio/gets.c: Ditto.
 2009-04-24 22:52:52 +00:00
Corinna Vinschen a11451b353 * libc/stdio/gets.c (_gets_r): Lock stdin here and call 
__sgetc_r instead of _getchar_r.
 2008-11-25 09:33:43 +00:00
Jeff Johnston 05b315770a 2004-04-23 Artem B. Bityuckiy <abitytsky@softminecorp.com> 
* libc/stdio/asprintf.c libc/stdio/clearerr.c,
        libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c,
        libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c,
        libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c,
        libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c,
        libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c,
        libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c,
        libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c,
        libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c,
        libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c,
        libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c,
        libc/stdio/getchar.c libc/stdio/getchar_u.c,
        libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c,
        libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h,
        libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c,
        libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c,
        libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c,
        libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c,
        libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c,
        libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c,
        libc/stdio/setlinebuf.c libc/stdio/setvbuf.c,
        libc/stdio/siprintf.c libc/stdio/snprintf.c,
        libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c,
        libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c,
        libc/stdio/vasprintf.c libc/stdio/vfieeefp.h,
        libc/stdio/vfprintf.c libc/stdio/vfscanf.c,
        libc/stdio/vprintf.c libc/stdio/vscanf.c,
        libc/stdio/vsnprintf.c libc/stdio/vsprintf.c,
        libc/stdio/vsscanf.c libc/stdio/wbuf.c,
        libc/stdio/wsetup.c: Perform minor formatting changes.  Move
        copyright notices to top of file, ensure that <_ansi.h> is
        included, be consistent with open parentheses, use _DEFUN macro,
        include "local.h" where needed, and remove various compiler
        warnings.
 2004-04-23 20:01:55 +00:00
Christopher Faylor 8a0efa53e4 import newlib-2000-02-17 snapshot 2000-02-17 19:39:52 +00:00