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Fix a few problems in fopen and freopen

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fopen should set the FD_CLOEXEC flag if requested evenif the kernel does
not support an aotmic operation.

freopen should reuse the file descriptor for the stream.  This is
especially important for calls to change the standard streams (stin,
stdout, stderr).
This commit is contained in:
Ulrich Drepper
2011-05-15 15:28:46 -04:00
parent bd25564e1e
commit 94b7cc3711
9 changed files with 143 additions and 39 deletions
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4
libio/libio.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1991-1995,1997-2006,2007,2009 Free Software Foundation, Inc.
/* Copyright (C) 1991-1995,1997-2006,2007,2009,2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Per Bothner <bothner@cygnus.com>.
@ -145,6 +145,8 @@
#define _IO_FLAGS2_USER_WBUF 8
#ifdef _LIBC
# define _IO_FLAGS2_SCANF_STD 16
# define _IO_FLAGS2_NOCLOSE 32
# define _IO_FLAGS2_CLOEXEC 64
#endif
/* These are "formatting flags" matching the iostream fmtflags enum values. */