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* fhandler.h (PIPE_ADD_PID): Define new flag.

Browse Source 
* pipe.cc (fhandler_pipe::create): Don't indiscriminately add process id to
every pipe since some pipe names (fifo, tty) don't need it.
* sigproc.cc (sigproc_init): Pass PIPE_ADD_PID to fhandler_pipe::create to
ensure that pid is always part of sigwait pipe name.
This commit is contained in:
Christopher Faylor 2012-04-30 15:38:45 +00:00
parent c9306c71ed
commit 28c8ae66d5
4 changed files with 25 additions and 7 deletions
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10
winsup/cygwin/ChangeLog
View File

@ -1,6 +1,14 @@
2012-04-30 Christopher Faylor <me.cygwin2012@cgf.cx>
* fhandler.h (PIPE_ADD_PID): Define new flag.
* pipe.cc (fhandler_pipe::create): Don't indiscriminately add process
id to every pipe since some pipe names (fifo, tty) don't need it.
* sigproc.cc (sigproc_init): Pass PIPE_ADD_PID to fhandler_pipe::create
to ensure that pid is always part of sigwait pipe name.
2012-04-28 Christopher Faylor <me.cygwin2012@cgf.cx>
* environ.cc (struct parse_thing): Add temporary (?) "pipe_byte" option.
* environ.cc (struct parse_thing): Add "pipe_byte" option.
* globals.cc (pipe_byte): Declare.
* pipe.cc (fhandler_pipe::create): Use current process id in pipe name
rather than pid for simple name collision avoidance. Do this only once

8
winsup/cygwin/fhandler.h
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@ -14,8 +14,8 @@ details. */
#include "tty.h"
/* fcntl flags used only internaly. */
#define O_NOSYMLINK 0x080000
#define O_DIROPEN 0x100000
#define O_NOSYMLINK 0x080000
#define O_DIROPEN 0x100000
/* newlib used to define O_NDELAY differently from O_NONBLOCK. Now it
properly defines both to be the same. Unfortunately, we have to
@ -36,6 +36,10 @@ details. */
so small. http://cygwin.com/ml/cygwin/2011-03/msg00541.html */
#define DEFAULT_PIPEBUFSIZE PREFERRED_IO_BLKSIZE
/* Used for fhandler_pipe::create. Use an available flag which will
never be used in Cygwin for this function. */
#define PIPE_ADD_PID PIPE_ACCESS_OUTBOUND
extern const char *windows_device_names[];
extern struct __cygwin_perfile *perfile_table;
#define __fmode (*(user_data->fmode_ptr))

11
winsup/cygwin/pipe.cc
View File

@ -211,9 +211,8 @@ fhandler_pipe::create (LPSECURITY_ATTRIBUTES sa_ptr, PHANDLE r, PHANDLE w,
psize = DEFAULT_PIPEBUFSIZE;
char pipename[MAX_PATH];
const size_t len = __small_sprintf (pipename, PIPE_INTRO "%S-%u-",
&cygheap->installation_key,
GetCurrentProcessId ());
size_t len = __small_sprintf (pipename, PIPE_INTRO "%S-",
&cygheap->installation_key);
DWORD pipe_mode = PIPE_READMODE_BYTE;
if (!name)
pipe_mode |= pipe_byte ? PIPE_TYPE_BYTE : PIPE_TYPE_MESSAGE;
@ -223,6 +222,12 @@ fhandler_pipe::create (LPSECURITY_ATTRIBUTES sa_ptr, PHANDLE r, PHANDLE w,
pipe_mode |= PIPE_TYPE_MESSAGE;
}
if (!name || (open_mode &= PIPE_ADD_PID))
{
len += __small_sprintf (pipename + len, "%u-", GetCurrentProcessId ());
open_mode &= ~PIPE_ADD_PID;
}
open_mode |= PIPE_ACCESS_INBOUND;
/* Retry CreateNamedPipe as long as the pipe name is in use.

3
winsup/cygwin/sigproc.cc
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@ -529,7 +529,8 @@ sigproc_init ()
char char_sa_buf[1024];
PSECURITY_ATTRIBUTES sa = sec_user_nih ((PSECURITY_ATTRIBUTES) char_sa_buf, cygheap->user.sid());
DWORD err = fhandler_pipe::create (sa, &my_readsig, &my_sendsig,
sizeof (sigpacket), "sigwait", 0);
sizeof (sigpacket), "sigwait",
PIPE_ADD_PID);
if (err)
{
SetLastError (err);