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newlib-cygwin
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* 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.
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
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@ -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> 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. * globals.cc (pipe_byte): Declare.
* pipe.cc (fhandler_pipe::create): Use current process id in pipe name * pipe.cc (fhandler_pipe::create): Use current process id in pipe name
rather than pid for simple name collision avoidance. Do this only once rather than pid for simple name collision avoidance. Do this only once

4
winsup/cygwin/fhandler.h
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@ -36,6 +36,10 @@ details. */
so small. http://cygwin.com/ml/cygwin/2011-03/msg00541.html */ so small. http://cygwin.com/ml/cygwin/2011-03/msg00541.html */
#define DEFAULT_PIPEBUFSIZE PREFERRED_IO_BLKSIZE #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 const char *windows_device_names[];
extern struct __cygwin_perfile *perfile_table; extern struct __cygwin_perfile *perfile_table;
#define __fmode (*(user_data->fmode_ptr)) #define __fmode (*(user_data->fmode_ptr))

11
winsup/cygwin/pipe.cc
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@ -211,9 +211,8 @@ fhandler_pipe::create (LPSECURITY_ATTRIBUTES sa_ptr, PHANDLE r, PHANDLE w,
psize = DEFAULT_PIPEBUFSIZE; psize = DEFAULT_PIPEBUFSIZE;
char pipename[MAX_PATH]; char pipename[MAX_PATH];
const size_t len = __small_sprintf (pipename, PIPE_INTRO "%S-%u-", size_t len = __small_sprintf (pipename, PIPE_INTRO "%S-",
&cygheap->installation_key, &cygheap->installation_key);
GetCurrentProcessId ());
DWORD pipe_mode = PIPE_READMODE_BYTE; DWORD pipe_mode = PIPE_READMODE_BYTE;
if (!name) if (!name)
pipe_mode |= pipe_byte ? PIPE_TYPE_BYTE : PIPE_TYPE_MESSAGE; 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; 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; open_mode |= PIPE_ACCESS_INBOUND;
/* Retry CreateNamedPipe as long as the pipe name is in use. /* 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]; char char_sa_buf[1024];
PSECURITY_ATTRIBUTES sa = sec_user_nih ((PSECURITY_ATTRIBUTES) char_sa_buf, cygheap->user.sid()); PSECURITY_ATTRIBUTES sa = sec_user_nih ((PSECURITY_ATTRIBUTES) char_sa_buf, cygheap->user.sid());
DWORD err = fhandler_pipe::create (sa, &my_readsig, &my_sendsig, DWORD err = fhandler_pipe::create (sa, &my_readsig, &my_sendsig,
sizeof (sigpacket), "sigwait", 0); sizeof (sigpacket), "sigwait",
PIPE_ADD_PID);
if (err) if (err)
{ {
SetLastError (err); SetLastError (err);