diff --git a/c/bpxskt.c b/c/bpxskt.c
index c7eace059..6956923f8 100644
--- a/c/bpxskt.c
+++ b/c/bpxskt.c
@@ -129,16 +129,17 @@ int setSocketTrace(int toWhat) {
   return was;
 }
 
-void sleep(int seconds){
-  int returnValue;
-  int *returnValuePtr;
+unsigned int sleep(unsigned int seconds){
+  unsigned int returnValue;
+  unsigned int *returnValuePtr;
   
 #ifndef _LP64
-  returnValuePtr = (int*) (0x80000000 | ((int)&returnValue));
+  returnValuePtr = (unsigned int*) (0x80000000 | ((int)&returnValue));
 #else
   returnValuePtr = &returnValue;
 #endif
   BPXSLP(seconds,returnValuePtr); 
+  return returnValue;
 }
 
 void bpxSleep(int seconds)
diff --git a/c/crossmemory.c b/c/crossmemory.c
index 5ad9c72ec..11bee3e89 100644
--- a/c/crossmemory.c
+++ b/c/crossmemory.c
@@ -3268,9 +3268,10 @@ static int handleModifyCommand(STCBase *base, CIB *cib, STCConsoleCommandType co
   return 0;
 }
 
-static void sleep(int seconds){
+static unsigned int sleep(unsigned int seconds){
   int waitValue = seconds * 100;
   __asm(" STIMER WAIT,BINTVL=%0\n" : : "m"(waitValue));
+  return 0;
 }
 
 static int isEnvironmentReady() {
diff --git a/c/mtlskt.c b/c/mtlskt.c
index 59b11f029..431153cc8 100644
--- a/c/mtlskt.c
+++ b/c/mtlskt.c
@@ -127,9 +127,10 @@
 
 static int socketTrace = 0;
 
-void sleep(int seconds){
+unsigned int sleep(unsigned int seconds){
   int waitValue = seconds * 100; 
   __asm(" STIMER WAIT,BINTVL=%0\n" : : "m"(waitValue)); 
+	return 0;
 }
 
 void bpxSleep(int seconds)
diff --git a/c/zosfile.c b/c/zosfile.c
index f3bc4e38b..33c529ca5 100644
--- a/c/zosfile.c
+++ b/c/zosfile.c
@@ -1642,14 +1642,14 @@ int fileSetLock(UnixFile *file, int *returnCode, int *reasonCode) {
 #endif
 
   int action = F_SET_LOCK;
-  F_LOCK flockdata;
+  BpxFLock flockdata;
   flockdata.l_type = F_WRITE_LOCK;
   flockdata.l_whence = F_SEEK_SET;
   flockdata.l_start = 0;
   flockdata.l_len = F_WHENCE_TO_END;
   flockdata.l_pid = 0;
 
-  F_LOCK *fnctl_ptr = &flockdata;
+  BpxFLock *fnctl_ptr = &flockdata;
 
   BPXFCT(&file->fd,
          &action,
@@ -1677,14 +1677,14 @@ int fileGetLock(UnixFile *file, int *returnCode, int *reasonCode, int *isLocked)
 #endif
 
   int action = F_GET_LOCK;
-  F_LOCK flockdata;
+  BpxFLock flockdata;
   flockdata.l_type = F_WRITE_LOCK;
   flockdata.l_whence = F_SEEK_SET;
   flockdata.l_start = 0;
   flockdata.l_len = F_WHENCE_TO_END;
   flockdata.l_pid = 0;
 
-  F_LOCK *fnctl_ptr = &flockdata;
+  BpxFLock *fnctl_ptr = &flockdata;
 
   BPXFCT(&file->fd,
          &action,
@@ -1716,14 +1716,14 @@ int fileUnlock(UnixFile *file, int *returnCode, int *reasonCode) {
 #endif
 
   int action = F_SET_LOCK;
-  F_LOCK flockdata;
+  BpxFLock flockdata;
   flockdata.l_type = F_UNLOCK;
   flockdata.l_whence = F_SEEK_SET;
   flockdata.l_start = 0;
   flockdata.l_len = F_WHENCE_TO_END;
   flockdata.l_pid = 0;
 
-  F_LOCK *fnctl_ptr = &flockdata;
+  BpxFLock *fnctl_ptr = &flockdata;
 
   BPXFCT(&file->fd,
          &action,
diff --git a/h/bpxnet.h b/h/bpxnet.h
index 0cb7f4a52..79c5a1e29 100644
--- a/h/bpxnet.h
+++ b/h/bpxnet.h
@@ -221,7 +221,7 @@ typedef struct hostent_tag{
 
 /* sleep(int seconds) is standard in linux */
 #if !defined(__ZOWE_OS_LINUX) && !defined(__ZOWE_OS_AIX)
-void sleep(int secs);
+unsigned int sleep(unsigned int);
 #endif 
 
 /* Set socket tracing; returns prior value */
diff --git a/h/dataservice.h b/h/dataservice.h
index ecbbdc2fc..671babe58 100644
--- a/h/dataservice.h
+++ b/h/dataservice.h
@@ -20,7 +20,7 @@
  */
 
 
-typedef int ExternalAPI(void);
+typedef int ExternalAPI(struct DataService_tag *,struct HttpServer_tag *);
 
 struct JsonObject_tag;
 struct HttpServer_tag;
diff --git a/h/metalio.h b/h/metalio.h
index 3b6f9bb8d..f05f72851 100644
--- a/h/metalio.h
+++ b/h/metalio.h
@@ -119,7 +119,7 @@ typedef struct WPLFlags_tag{
 } WPLFlags;
 
 
-typedef int ntFunction(void);
+typedef int ntFunction(int *, ...);
 
 #define NT_CREATE   1
 #define NT_RETRIEVE 2
diff --git a/h/unixfile.h b/h/unixfile.h
index 5bdbc151b..a82d0972d 100644
--- a/h/unixfile.h
+++ b/h/unixfile.h
@@ -445,13 +445,13 @@ typedef struct F_CVT_tag {
 /* Length Values */
 #define F_WHENCE_TO_END  0            /* Locked file is from whence to end of the file */
 
-typedef struct F_LOCK_TAG {
+typedef struct BpxFLock_Tag {
   short l_type;
   short l_whence;
   int64 l_start;
   int64 l_len;
   unsigned int l_pid;
-} F_LOCK;
+} BpxFLock;
 
 int fileDisableConversion(UnixFile *file, int *returnCode, int *reasonCode);
 int fileSetLock(UnixFile *file, int *returnCode, int *reasonCode);