From a9457fc02b8ddccb28252c343b8dbee83dd6bf31 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Mon, 19 Apr 2021 10:59:50 -0700
Subject: [PATCH] osiSpawnDetachedProcess() prefix process name with '!' to
 silence warning

---
 modules/libcom/src/osi/os/WIN32/osdProcess.c | 6 +++++-
 modules/libcom/src/osi/os/posix/osdProcess.c | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/modules/libcom/src/osi/os/WIN32/osdProcess.c b/modules/libcom/src/osi/os/WIN32/osdProcess.c
index 0f137bf37..cff1ed4bd 100644
--- a/modules/libcom/src/osi/os/WIN32/osdProcess.c
+++ b/modules/libcom/src/osi/os/WIN32/osdProcess.c
@@ -50,10 +50,14 @@ LIBCOM_API osiGetUserNameReturn epicsStdCall osiGetUserName (char *pBuf, unsigne
 LIBCOM_API osiSpawnDetachedProcessReturn epicsStdCall osiSpawnDetachedProcess 
     ( const char *pProcessName, const char *pBaseExecutableName )
 {
+    BOOL silent = pProcessName && pProcessName[0]=='!';
     BOOL status;
     STARTUPINFO startupInfo;
     PROCESS_INFORMATION processInfo;
 
+    if(silent)
+        pProcessName++; /* skip '!' */
+
     GetStartupInfo ( &startupInfo );
     startupInfo.lpReserved = NULL;
     startupInfo.lpTitle = (char *) pProcessName;
@@ -115,7 +119,7 @@ LIBCOM_API osiSpawnDetachedProcessReturn epicsStdCall osiSpawnDetachedProcess
             /* Free the buffer. */
             LocalFree (errStrMsgBuf);
         }
-        else {
+        else if(!silent) {
             fprintf (stderr, "!!WARNING!!\n");
             fprintf (stderr, "Unable to locate executable \"%s\".\n", pBaseExecutableName);
             fprintf (stderr, "You may need to modify your \"path\" environment variable.\n");
diff --git a/modules/libcom/src/osi/os/posix/osdProcess.c b/modules/libcom/src/osi/os/posix/osdProcess.c
index 9f33cb10b..b2c26beb4 100644
--- a/modules/libcom/src/osi/os/posix/osdProcess.c
+++ b/modules/libcom/src/osi/os/posix/osdProcess.c
@@ -63,8 +63,12 @@ LIBCOM_API osiSpawnDetachedProcessReturn epicsStdCall osiSpawnDetachedProcess
     (const char *pProcessName, const char *pBaseExecutableName)
 {
     int status;
+    int silent = pProcessName && pProcessName[0]=='!';
     int fds[2]; /* [reader, writer] */
 
+    if(silent)
+        pProcessName++; /* skip '!' */
+
     if(pipe(fds))
         return osiSpawnDetachedProcessFail;
 
@@ -137,7 +141,7 @@ LIBCOM_API osiSpawnDetachedProcessReturn epicsStdCall osiSpawnDetachedProcess
      * Run the specified executable
      */
     status = execlp (pBaseExecutableName, pBaseExecutableName, (char *)NULL);
-    if ( status < 0 ) {
+    if ( status < 0 && !silent ) {
         fprintf ( stderr, "**** The executable \"%s\" couldn't be located\n", pBaseExecutableName );
         fprintf ( stderr, "**** because of errno = \"%s\".\n", strerror (errno) );
         fprintf ( stderr, "**** You may need to modify your PATH environment variable.\n" );