* 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, 25 insertions, 2 deletions

diff --git a/winsup/cygwin/pinfo.h b/winsup/cygwin/pinfo.h
index dcb814bcc..fe36b5a27 100644
--- a/winsup/cygwin/pinfo.h
+++ b/winsup/cygwin/pinfo.h
@@ -16,7 +16,7 @@ enum
 {
   __SIGFLUSH	    = -2,
   __SIGSTRACE	    = -1,
-  __SIGUNUSED	    =  0,
+  __SIGCOMMUNE	    =  0,
   __SIGOFFSET	    =  2
 };
 
@@ -25,6 +25,17 @@ enum
 #include <sys/resource.h>
 #include "thread.h"
 
+struct commune_result
+{
+  char *s;
+  int n;
+};
+
+enum picom
+{
+  PICOM_CMDLINE = 1
+};
+
 class _pinfo
 {
 public:
@@ -81,6 +92,11 @@ public:
 
   /* Non-zero if process was stopped by a signal. */
   char stopsig;
+  
+  /* commune */
+  pid_t hello_pid;
+  HANDLE tothem;
+  HANDLE fromthem;
 
   void exit (UINT n, bool norecord = 0) __attribute__ ((noreturn, regparm(2)));
 
@@ -119,12 +135,19 @@ public:
   }
 
   inline void setthread2signal (void *thr) {thread2signal = (pthread *) thr;}
+  void commune_recv ();
+  commune_result commune_send (DWORD);
+  bool alive ();
+  char *cmdline (size_t &);
+
+  friend void __stdcall set_myself (pid_t, HANDLE);
 
 private:
   struct sigaction sigs[NSIG];
   sigset_t sig_mask;		/* one set for everything to ignore. */
   LONG _sigtodo[NSIG + __SIGOFFSET];
-  pthread *thread2signal;  // NULL means means thread any other means a pthread
+  pthread *thread2signal;  // NULL means thread any other means a pthread
+  CRITICAL_SECTION lock;
 };
 
 class pinfo