* external.cc (cygwin_internal): Implement CW_CMDLINE.

* pinfo.h (SIGCOMMUNE): New signal type.
(commune_result): New structure for commune functions.
(picom): New enum for commune functions.
(_pinfo::hello_pid): New.  Pid who's communicating with me.
(_pinfo::tothem): New.  Handle of communicating pipe.
(_pinfo::fromthem): Ditto.
(_pinfo::commune_recv): Declare.
(_pinfo::commune_send): Declare.
(_pinfo::alive): Declare.
(_pinfo::cmdline): Declare.
(_pinfo::lock): Declare.
* pinfo.cc (set_myself): Initialize new _pinfo lock.
(_pinfo::alive): Define.  Determines if process still exists.
(_pinfo::commune_recv): Define.  Receive info from another cooperating process.
(_pinfo::commune_send): Define.  Send info to another cooperating process.
(_pinfo::cmdline): Define.  Determine command line of a given process.
* include/sys/cygwin.h (CW_CMDLINE): Define.
*sigproc.cc (talktome): Communicate with any processes who want to talk to me.
(wait_sig): Honor __SIGCOMMUNE.
* fhandler.cc (fhandler_virtual::fixup_after_exec): Declare.
* fhandler_proc.cc: Use malloc/free/realloc throughout rather than cmalloc
since buffers don't need to be propagated to subprocesses.
* fhandler_registry.cc: Ditto.
* fhandler_virtual.cc: Ditto.
(fhandler_virtual::fixup_after_exec): Define.
* fhandler_process.cc: Ditto for malloc/free/realloc.
(process_listin): Add "cmdline".
(fhandler_process::fill_filebuf): Implement PROCESS_CMDLINE.
* miscfuncs.cc (isalpha_array): New array populated with xor values for alpha
characters to switch from one case to another.
* string.h (cygwin_strcasematch): New asm implementation of case match.
* string.h (cygwin_nstrcasematch): New asm implementation of counted case
match.

1 files changed, 13 insertions, 0 deletions

diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index 9fb1fd498..5eeef7f35 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -1014,6 +1014,15 @@ stopped_or_terminated (waitq *parent_w, _pinfo *child)
   return -potential_match;
 }
 
+static void
+talktome ()
+{
+  winpids pids;
+  for (unsigned i = 0; i < pids.npids; i++)
+    if (pids[i]->hello_pid == myself->pid)
+      pids[i]->commune_recv ();
+}
+
 /* Process signals by waiting for a semaphore to become signaled.
  * Then scan an in-memory array representing queued signals.
  * Executes in a separate thread.
@@ -1143,6 +1152,10 @@ wait_sig (VOID *self)
 		  strace.hello ();
 		  break;
 
+		case __SIGCOMMUNE:
+		  talktome ();
+		  break;
+
 		/* A normal UNIX signal */
 		default:
 		  sigproc_printf ("Got signal %d", sig);