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* cygwin.din (dup3): Export.

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(pipe2): Export.
	* dtable.cc (dtable::dup_worker): Take additional flags parameter.
	Handle O_CLOEXEC flag.
	(dtable::dup3): Rename from dup2.  Take additional flags parameter.
	Check for valid flags.  Drop check for newfd == oldfd.
	* dtable.h (dtable::dup_worker): Add flags parameter.
	(dtable::dup3): Rename from dup2.
	* fcntl.cc (fcntl64): Add F_DUPFD_CLOEXEC case.
	* fhandler.h (fhandler_mailslot::get_object_attr): Add flags parameter.
	* fhandler.cc (fhandler_base::open): Use security attribute with
	inheritance according to setting of O_CLOEXEC flag.
	* fhandler_console.cc (fhandler_console::open): Ditto.
	* fhandler_fifo.cc (sec_user_cloexec): New inline function to
	create security attribute with inheritance according to setting of
	O_CLOEXEC flag.
	(fhandler_fifo::open): Call sec_user_cloexec to fetch security
	attribute.
	(fhandler_fifo::wait): Ditto.
	* fhandler_mem.cc (fhandler_dev_mem::open): Ditto.
	* fhandler_mailslot.cc (fhandler_mailslot::get_object_attr): Take
	additional flags parameter.  Use security attribute with inheritance
	according to setting of O_CLOEXEC flag.
	(fhandler_mailslot::open): Call get_object_attr with flags parameter.
	* fhandler_registry.cc (fhandler_registry::open): Call set_close_on_exec
	on real handles to accommodate O_CLOEXEC flag.
	* fhandler_tty.cc (fhandler_tty_slave::open): Ditto.
	* fhandler_tape.cc: Create mutex with inheritance according to setting
	of O_CLOEXEC flag.
	* pipe.cc: Replace usage of O_NOINHERIT with O_CLOEXEC.
	 (fhandler_pipe::init): Simplify setting close_on_exec flag.
	(fhandler_pipe::open): Remove setting close_on_exec flag.
	(fhandler_pipe::create): Use security attribute with inheritance
	according to setting of O_CLOEXEC flag.
	(pipe2): New exported function.
	* posix_ipc.cc: Throughout, open backing files with O_CLOEXEC
	flag to follow POSIX semantics.
	* security.h (sec_none_cloexec): New define.
	* syscalls.cc (dup): Add missing extern "C" qualifier.  Accommodate
	renaming of dtable::dup2 to dtable::dup3.
	(dup2): Ditto.  Check newfd == oldfd here.
	(dup3): New function.  Check newfd == oldfd here.
	(open): Set close_on_exec flag according to O_CLOEXEC flag before
	calling fhandler->open.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
This commit is contained in:
Corinna Vinschen
2010-01-14 18:46:02 +00:00
parent 491912bffe
commit e70fdfb99f
19 changed files with 175 additions and 63 deletions
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12
winsup/cygwin/posix_ipc.cc
View File

@@ -1,6 +1,6 @@
/* posix_ipc.cc: POSIX IPC API for Cygwin.
Copyright 2007, 2008, 2009 Red Hat, Inc.
Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
This file is part of Cygwin.
@@ -248,7 +248,7 @@ shm_open (const char *name, int oflag, mode_t mode)
return -1;
}
return open (shmname, oflag, mode & 0777);
return open (shmname, oflag | O_CLOEXEC, mode & 0777);
}
extern "C" int
@@ -351,7 +351,7 @@ again:
va_end (ap);
/* Open and specify O_EXCL and user-execute */
fd = open (mqname, oflag | O_EXCL | O_RDWR, mode | S_IXUSR);
fd = open (mqname, oflag | O_EXCL | O_RDWR | O_CLOEXEC, mode | S_IXUSR);
if (fd < 0)
{
if (errno == EEXIST && (oflag & O_EXCL) == 0)
@@ -435,7 +435,7 @@ again:
exists:
/* Open the file then memory map */
if ((fd = open (mqname, O_RDWR)) < 0)
if ((fd = open (mqname, O_RDWR | O_CLOEXEC)) < 0)
{
if (errno == ENOENT && (oflag & O_CREAT))
goto again;
@@ -944,7 +944,7 @@ again:
va_end (ap);
/* Open and specify O_EXCL and user-execute */
fd = open (semname, oflag | O_EXCL | O_RDWR, mode | S_IXUSR);
fd = open (semname, oflag | O_EXCL | O_RDWR | O_CLOEXEC, mode | S_IXUSR);
if (fd < 0)
{
if (errno == EEXIST && (oflag & O_EXCL) == 0)
@@ -974,7 +974,7 @@ again:
exists:
/* Open the file and fetch the semaphore name. */
if ((fd = open (semname, O_RDWR)) < 0)
if ((fd = open (semname, O_RDWR | O_CLOEXEC)) < 0)
{
if (errno == ENOENT && (oflag & O_CREAT))
goto again;