Largely comments and splint conformance

r1070 | dcl | 2006-08-21 09:47:25 +1000 (Mon, 21 Aug 2006) | 2 lines
2006-08-21 09:47:25 +10:00
parent 7660b67290
commit b2ce43d554
1 changed files with 241 additions and 122 deletions
--- a/site_ansto/counterdriv.c
+++ b/site_ansto/counterdriv.c
@@ -13,6 +13,7 @@
 #include <assert.h>
 #include <math.h>
 #include <time.h>
+#include <sys/time.h>
 #include "fortify.h"
 #include <string.h>
 #include <sics.h>
@@ -20,17 +21,28 @@
 #include <countdriv.h>
 #include "anstoutil.h"

-#define FAILURE 0
-#define SUCCESS 1
+#ifdef SPLINT
+/*@-incondefs@*/
+int gettimeofday(/*@out@*/ struct timeval *restrict tp,
+    /*@null@*/ void *restrict tzp);
+char *strdup(const char *s);
+int strcasecmp(const char *s1, const char *s2);
+int strncasecmp(const char *s1, const char *s2, size_t n);
+unsigned long long int
+strtoull(const char *nptr, /*@null@*/ char **endptr, int base);
+/*@+incondefs@*/
+#endif

 /*@-incondefs@*/
 /*@observer@*//*@dependent@*/  Tcl_Interp *InterpGetTcl(SicsInterp *pSics);
 int readRS232(prs232 self, /*@out@*/void *data, /*@out@*/int *dataLen);
+int readRS232TillTerm(prs232 self, /*@out@*/void *data, /*@out@*/int *dataLen);
 void getRS232Error(int iCode, /*@out@*/ char *errorBuffer, int errorBufferLen);
 /*@observer@*//*@dependent@*/ pCounterDriver CreateCounterDriver(char *name, char *type);
 void KillRS232(/*@only@ frees pData */ void *pData);
 /*@+incondefs@*/

+typedef unsigned long long int uint64;

 typedef struct {
  int length;
@@ -46,17 +58,22 @@ typedef struct {
  int iPort;
  float dummy_threshold;
  BUFFER buffer;
-  unsigned long long counter_value;
+  uint64 counter_value;
 } BeamMon, *pBeamMon;

-static int MonSend(CounterDriver *cntrData, char *pText, char *pReply, int iReplyLen);
-
+/** \brief file logging
+ *
+ * Logs text to a debug file. The file is opened and closed for each call.
+ *
+ * \param flag character used to distinguish calls
+ * \param pText pointer to text to be logged
+ */
 static void flog(char flag, char* pText) {
  FILE* file;
  file = fopen("flog.txt", "a");
  if (file) {
    struct timeval tv;
-    gettimeofday(&tv, NULL);
+    (void) gettimeofday(&tv, NULL);
    fprintf(file, "%02d:%02d:%02d:%06d::%c::%s",
        tv.tv_sec % (24 * 3600) / 3600,
        tv.tv_sec % (3600) / 60,
@@ -65,8 +82,8 @@ static void flog(char flag, char* pText) {
        flag,
        pText);
    if (strchr(pText, '\n') == NULL)
-      fputc('\n', file);
-    fclose(file);
+      (void) fputc('\n', file);
+    (void) fclose(file);
  }
 }

@@ -75,19 +92,17 @@ static void flog(char flag, char* pText) {
 *
 * \param *cntrData provides access to a monitor's data
 * \param *text pointer to NULL terminated text to send.
- * \return
- * - SUCCESS
- * - FAILURE
+ * \return SUCCESS or FAILURE
 */
 static int MonWrite(pBeamMon self, char* text) {
-  int len;
+  size_t len;
  int status;

  len = strlen(text);
  if (len > 0)
    flog('>', text);

-  status = writeRS232(self->controller, text, len);
+  status = writeRS232(self->controller, text, (int) len);
  if (status != 1) {
    self->errorCode = status;
    return FAILURE;
@@ -101,13 +116,12 @@ static int MonWrite(pBeamMon self, char* text) {
 * \param *cntrData provides access to a monitor's data
 * \param *text pointer to NULL terminated text to receive.
 * \param *pLen inout pointer to length of text to receive.
- * \return
- * - SUCCESS
- * - FAILURE
+ * \return SUCCESS or FAILURE
 */
-static int MonRead(pBeamMon self, char* text, int *pLen) {
+static int MonRead(pBeamMon self, /*@out@*/ char* text, int *pLen) {
  int i, status, retries=20;

+  *text = '\0';
  for (i=0; i<retries; i++) {
    status = readRS232TillTerm(self->controller, text, pLen);
    switch (status) {
@@ -129,16 +143,86 @@ static int MonRead(pBeamMon self, char* text, int *pLen) {
  return FAILURE;
 }

+/** \brief drains any pending input on the RS232 channel
+ *
+ * \param *cntrData provides access to a monitor's data
+ */
+static void MonDrainInput(CounterDriver *cntrData) {
+  int iRet;
+  int len;
+  char reply[1024];
+  BeamMon* self = NULL;
+  self = (BeamMon *) cntrData->pData;
+  while (availableRS232(self->controller) != 0) {
+    len = (int) sizeof(reply);
+    iRet = MonRead(self, reply, &len);
+    if (iRet == FAILURE) {
+      return;
+    }
+  }
+}
+
+/** \brief sends a command to the monitor and gets the reply
+ *
+ * \param cntrData provides access to a monitor's data
+ * \param pText command to send
+ * \param pReply space for reply
+ * \param iReplyLen length of space for reply
+ * \return SUCCESS or FAILURE
+ */
+static int MonSend(CounterDriver *cntrData, char *pText, char *pReply, int iReplyLen) {
+  BeamMon *self = NULL;
+  int status;
+
+  self = (BeamMon *) cntrData->pData;
+  MonDrainInput(cntrData);
+  status = MonWrite(self, pText);
+  if (status != SUCCESS)
+    return status;
+  if ((status = MonRead(self, pReply, &iReplyLen)) == SUCCESS)
+  {
+    pReply[iReplyLen] = '\0'; 
+    return SUCCESS;
+  }
+  return status;
+}
+
+/** \brief sends a command to the monitor and gets the reply
+ *
+ * \param cntrData provides access to a monitor's data
+ * \param pText command to send
+ * \param buffer space for reply
+ * \return SUCCESS or FAILURE
+ */
+static int MonSendBuffer(CounterDriver *cntrData, char *pText, BUFFER* buffer) {
+  int status;
+  buffer->length = 0;
+  status = MonSend(cntrData, pText, buffer->body, (int) sizeof(buffer->body));
+  if (status == SUCCESS) {
+    buffer->length = (int) strlen(buffer->body);
+  }
+  return status;
+}
+/** \brief parses and acts upon the READ line
+ *
+ * \param *cntrData provides access to a monitor's data
+ * \param bp pointer to buffer containing the text line
+ *
+ * This function sets the state of the counter based on state flags reported by
+ * the monitor.
+ */
 static void HandleReport(CounterDriver *cntrData, BUFFER* bp)
 {
  //READ xxxx 00:00:00.000000 0.000000          0     0.00
  //0123456789012345678901234567890
  BeamMon* self = NULL;
+  char *cp = NULL;
+  char *ep = NULL;
+  char str[100];
  self = (BeamMon *) cntrData->pData;
  /* TODO better than this */
-  char* cp = &bp->body[26];
-  char* ep;
-  cntrData->fTime = strtod(cp, &ep);
+  cp = &bp->body[26];
+  cntrData->fTime = (float) strtod(cp, &ep);
  cp = ep;
  switch (toupper(bp->body[5])) {
    case 'I': /* idle */
@@ -151,16 +235,16 @@ static void HandleReport(CounterDriver *cntrData, BUFFER* bp)
    case 'P': /* paused */
      self->state = HWPause;
      break;
-    default:
+    default: /* should not happen */
      self->state = HWFault;
      break;
  }
-  if (toupper(bp->body[8] == 'G')) /* Gated */
+  if ((self->state == HWBusy || self->state == HWPause)
+      && (toupper(bp->body[8]) == (int) 'G')) /* Gated */
    self->state = HWNoBeam;
  self->counter_value = strtoull(cp, &ep, 10);
-  cntrData->fLastCurrent = self->counter_value;
-  char str[100];
-  snprintf(str, sizeof(str), "READ %s, %f, %f, %f\n",
+  cntrData->fLastCurrent = (float) self->counter_value;
+  (void) snprintf(str, sizeof(str), "READ %s, %f, %f, %f\n",
      cntrData->eMode == eTimer ? "eTimer" :
      cntrData->eMode == ePreset ? "ePreset" : "Unknown",
      cntrData->fPreset,
@@ -169,70 +253,60 @@ static void HandleReport(CounterDriver *cntrData, BUFFER* bp)
  flog('.', str);
 }

-static int MonDrainInput(CounterDriver *cntrData) {
-  int iRet, len;
-  char reply[1024];
+/** \brief handles an input line received on the RS232 channel
+ *
+ * \param cntrData provides access to a monitor's data
+ * \param bp pointer to buffer containing the line of input
+ *
+ * This function sets the state of the counter based on events reported by
+ * the monitor.
+ */
+static void MonHandleInput(CounterDriver *cntrData, BUFFER* bp) {
  BeamMon* self = NULL;
-  self = (BeamMon *) cntrData->pData;
-  while (availableRS232(self->controller)) {
-    len = sizeof(reply);
-    iRet = MonRead(self, reply, &len);
-    if (iRet == FAILURE) {
-      return iRet;
-    }
-  }
-  return SUCCESS;
-}
-
-static int MonHandleInput(CounterDriver *cntrData, BUFFER* bp) {
-  BeamMon* self = NULL;
-  int iRet, len;
-  int iLen = 0;
-  int jLen = 0;
-  char reply[1024];
-  char* pTerm;
+  const char et[] = "EVENT TERMINAL";
+  const char eri[] = "EVENT RANGE IN";
+  const char ero[] = "EVENT RANGE OUT";
+  const char rpt[] = "READ";

  self = (BeamMon *) cntrData->pData;
  /* TODO handle the line */
-  flog('<', bp->body);
-  const char et[] = "EVENT TERMINAL";
+  flog('=', bp->body);
  if (strncasecmp(bp->body, et, sizeof(et) - 1) == 0) {
    if (self->state == HWBusy)
      self->state = HWIdle;
  }
-  const char eri[] = "EVENT RANGE IN";
  if (strncasecmp(bp->body, eri, sizeof(eri) - 1) == 0)
    if (self->state == HWPause)
      self->state = HWBusy;
-  const char ero[] = "EVENT RANGE OUT";
  if (strncasecmp(bp->body, ero, sizeof(ero) - 1) == 0)
    if (self->state == HWBusy)
      self->state = HWPause;
-  const char rpt[] = "READ";
  if (strncasecmp(bp->body, rpt, sizeof(rpt) - 1) == 0) {
-    if (self->state == HWBusy) {
      HandleReport(cntrData, &self->buffer);
-      MonWrite(self, "SICS READ");
-    }
  }
  bp->length = 0;
-  return 1;
 }

-static int MonLookForInput(CounterDriver *cntrData, int timeout) {
+/** \brief look for input on the socket
+ *
+ * breaks input into lines terminated by <CR><LF> pairs and passes complete lines to MonHandleInput for processing.
+ *
+ * \param cntrData provides access to a monitor's data
+ * \param timeout upper limit on time to wait for data to arrive 
+ */
+static void MonLookForInput(CounterDriver *cntrData, /*@unused@*/ int timeout) {
  BeamMon* self = NULL;
  int iRet, len;
  int iLen = 0;
  int jLen = 0;
  char reply[1024];
-  char* pTerm;

  self = (BeamMon *) cntrData->pData;
-  while (availableRS232(self->controller)) {
-    len = sizeof(reply);
+  while (availableRS232(self->controller) != 0) {
+    len = (int) sizeof(reply);
    iRet = MonRead(self, reply, &len);
    if (iRet == FAILURE) {
-      return iRet;
+      return;
    }
    iLen = 0;
    while (iLen < len) {
@@ -243,7 +317,7 @@ static int MonLookForInput(CounterDriver *cntrData, int timeout) {
        jLen = len - iLen;
      strncpy(&self->buffer.body[self->buffer.length],
          &reply[iLen],
-          jLen);
+          (size_t) jLen);
      self->buffer.length += jLen;
      self->buffer.body[self->buffer.length] = '\0';
      iLen += jLen;
@@ -254,7 +328,6 @@ static int MonLookForInput(CounterDriver *cntrData, int timeout) {
      self->buffer.length = 0;
    }
  }
-  return 1;
 }

 /** \brief Returns the counter status,
@@ -275,7 +348,7 @@ static int MonGetStatus(CounterDriver *cntrData, float *fControl) {

  self = (BeamMon *) cntrData->pData;
  MonLookForInput(cntrData, 0);
-  status = MonSend(cntrData, "SICS READ", self->buffer.body, sizeof(self->buffer.body));
+  status = MonSendBuffer(cntrData, "SICS READ", &self->buffer);
  if (status == SUCCESS) {
    /* TODO */
    MonHandleInput(cntrData, &self->buffer);
@@ -302,11 +375,18 @@ static int MonGetStatus(CounterDriver *cntrData, float *fControl) {
 /** \brief Starts counting in the current mode and with the current preset
 *
 * \param *cntrData provides access to a monitor's data
+ * \return SUCCESS or FAILURE
+ *
+ * This function also sets some of the parameters in the monitor for mode and
+ * preset.
+ *
+ * TODO: check the return from the monitor
 */
 static int MonStart(CounterDriver *cntrData) {
  BeamMon *self = NULL;
+  int status;
  char str[100];
-  snprintf(str, sizeof(str), "START %s, %f, %f, %f\n",
+  (void) snprintf(str, sizeof(str), "START %s, %f, %f, %f\n",
      cntrData->eMode == eTimer ? "eTimer" :
      cntrData->eMode == ePreset ? "ePreset" : "Unknown",
      cntrData->fPreset,
@@ -316,18 +396,34 @@ static int MonStart(CounterDriver *cntrData) {
  self = (BeamMon *) cntrData->pData;
  MonDrainInput(cntrData);
  if (cntrData->eMode == eTimer) {
-    MonSend(cntrData, "SICS SET TE_CHECK=TIMER",
-        self->buffer.body, sizeof(self->buffer.body));
-  } else {
-    MonSend(cntrData, "SICS SET TE_CHECK=COUNTER",
-        self->buffer.body, sizeof(self->buffer.body));
+    status = MonSendBuffer(cntrData, "SICS SET TE_CHECK=TIMER", &self->buffer);
+    if (status != SUCCESS || strcasecmp(self->buffer.body, "OK") != 0) {
+      self->errorCode = /* TODO */ 0;
+      return FAILURE;
+    }
+  } else {
+    status = MonSendBuffer(cntrData, "SICS SET TE_CHECK=COUNTER", &self->buffer);
+    if (status != SUCCESS || strcasecmp(self->buffer.body, "OK") != 0) {
+      self->errorCode = /* TODO */ 0;
+      return FAILURE;
+    }
+  }
+  /*@-duplicatequals@ for uint64 */ 
+  /*@-formattype@ for uint64 */ 
+  (void) snprintf(str, sizeof(str), "SICS SET TERMINAL=%llu",
+      (uint64) cntrData->fPreset);
+  /*@+formattype@*/ 
+  /*@+duplicatequals@*/ 
+  status = MonSendBuffer(cntrData, str, &self->buffer);
+  if (status != SUCCESS || strcasecmp(self->buffer.body, "OK") != 0) {
+    self->errorCode = /* TODO */ 0;
+    return FAILURE;
+  }
+  status = MonSendBuffer(cntrData, "SICS START", &self->buffer);
+  if (status != SUCCESS || strcasecmp(self->buffer.body, "OK") != 0) {
+    self->errorCode = /* TODO */ 0;
+    return FAILURE;
  }
-  snprintf(str, sizeof(str), "SICS SET TERMINAL=%llu",
-      (unsigned long long) cntrData->fPreset);
-  MonSend(cntrData, str,
-        self->buffer.body, sizeof(self->buffer.body));
-  MonSend(cntrData, "SICS START",
-        self->buffer.body, sizeof(self->buffer.body));
  self->state = HWBusy;
  return SUCCESS;
 }
@@ -335,13 +431,18 @@ static int MonStart(CounterDriver *cntrData) {
 /** \brief Pauses a counting operation
 *
 * \param *cntrData provides access to a monitor's data
+ * \return SUCCESS or FAILURE
+ *
+ * TODO: check if we should set the state to HWPause or just leave it till we
+ * get it back from the monitor.
 */
 static int MonPause(CounterDriver *cntrData) {
  BeamMon *self = NULL;
+  int status;

  self = (BeamMon *) cntrData->pData;
-  if (MonSend(cntrData, "SICS PAUSE",
-        self->buffer.body, sizeof(self->buffer.body)) == SUCCESS) {
+  status = MonSendBuffer(cntrData, "SICS PAUSE", &self->buffer);
+  if (status == SUCCESS) {
    self->state = HWPause;
    return SUCCESS;
  }
@@ -351,13 +452,18 @@ static int MonPause(CounterDriver *cntrData) {
 /* \brief Continues a paused counting operation.
 *
 * \param *cntrData provides access to a monitor's data
+ * \return SUCCESS or FAILURE
+ *
+ * TODO: check if we should set the sate to HWBusy or just leave it till we
+ * get it back from the monitor.
 */
 static int MonContinue(CounterDriver *cntrData) {
  BeamMon *self = NULL;
+  int status;

  self = (BeamMon *) cntrData->pData;
-  if (MonSend(cntrData, "SICS CONTINUE",
-        self->buffer.body, sizeof(self->buffer.body)) == SUCCESS) {
+  status = MonSendBuffer(cntrData, "SICS CONTINUE", &self->buffer);
+  if (status == SUCCESS) {
    self->state = HWBusy;
    return SUCCESS;
  }
@@ -366,14 +472,19 @@ static int MonContinue(CounterDriver *cntrData) {

 /** \brief Cancels a counting operation. This is an emergency stop used when interrupting an operation.
 * \param *cntrData provides access to a monitor's data
+ * \return SUCCESS or FAILURE
+ *
+ * TODO: check if we should set the sate to HWIdle or just leave it till we
+ * get it back from the monitor.
 */
 static int MonHalt(CounterDriver *cntrData) {
  BeamMon *self = NULL;
+  int status;

  self = (BeamMon *) cntrData->pData;
-  if (MonSend(cntrData, "SICS STOP",
-        self->buffer.body, sizeof(self->buffer.body)) == SUCCESS) {
-    self->state = HWBusy;
+  status = MonSendBuffer(cntrData, "SICS STOP", &self->buffer);
+  if (status == SUCCESS) {
+    self->state = HWIdle;
    return SUCCESS;
  }
  return FAILURE;
@@ -382,19 +493,22 @@ static int MonHalt(CounterDriver *cntrData) {
 /** \brief Reads the counter and the monitors in the lCounts array.
 *
 * \param *cntrData provides access to a monitor's data
+ * \return SUCCESS or FAILURE
 */
 static int MonReadValues(CounterDriver *cntrData) {
  BeamMon *self = NULL;
+  int status;

  flog('.', "MonReadValues");
  self = (BeamMon *) cntrData->pData;
-  if (MonSend(cntrData, "SICS READ",
-        self->buffer.body, sizeof(self->buffer.body)) == SUCCESS) {
+  status = MonSendBuffer(cntrData, "SICS READ", &self->buffer);
+  if (status == SUCCESS) {
    HandleReport(cntrData, &self->buffer);
-    lCounts[0] = self->counter_value;
-  }
+    cntrData->lCounts[0] = (long) self->counter_value; /* NOTE: truncation */
    return SUCCESS;
  }
+  return FAILURE;
+}    

 /* \brief Called when an error condition is reported by a counter operation.
 * 
@@ -411,7 +525,7 @@ static int MonGetError(CounterDriver *cntrData, int *iCode, char *error, int iEr
  self = (BeamMon *) cntrData->pData;
  /* Allocate iErrLen bytes for error messages */
  if (self->errorMsg == NULL) {
-    self->errorMsg = (char *) malloc(iErrLen);
+    self->errorMsg = (char *) malloc((size_t) iErrLen);
    if (self->errorMsg == NULL) {
      return FAILURE;
    }
@@ -420,7 +534,9 @@ static int MonGetError(CounterDriver *cntrData, int *iCode, char *error, int iEr
  *iCode = self->errorCode;
  switch (*iCode) { 
    case 0:
-      strncpy(error, "UNKNOWN ERROR: counterdriv did not set an errorcode.", iErrLen);
+      strncpy(error,
+          "UNKNOWN ERROR: counterdriv did not set an errorcode.",
+          (size_t) iErrLen);
      break;
    case NOTCONNECTED:
    case TIMEOUT:
@@ -430,7 +546,9 @@ static int MonGetError(CounterDriver *cntrData, int *iCode, char *error, int iEr
      getRS232Error(*iCode, error, iErrLen);
      break;
    default:
-      snprintf(error, iErrLen, "Unknown error code: %d, returned from counterdriv", *iCode);
+      (void) snprintf(error, (size_t) iErrLen,
+          "Unknown error code: %d, returned from counterdriv",
+          *iCode);
  }
  self->errorCode = 0;
  return SUCCESS;
@@ -453,8 +571,9 @@ static int MonTryAndFixIt(CounterDriver *cntrData, int iCode) {

  switch(iCode){
    case NOTCONNECTED:
-      initRS232(self->controller);
+      if (initRS232(self->controller) == 1)
        return COREDO;
+      return COTERM;
    case BADSEND:  
    case TIMEOUT:
    case BADMEMORY: /* Won't happen if MonConnect sets the send terminator */
@@ -473,7 +592,7 @@ static int MonTryAndFixIt(CounterDriver *cntrData, int iCode) {
 static int MonSet(CounterDriver *cntrData, char *name, int iCter, float fVal) {
  BeamMon *self = NULL;
  char str[100];
-  snprintf(str, 100, "MonSet(%s, %d, %f)", name, iCter, fVal);
+  (void) snprintf(str, 100, "MonSet(%s, %d, %f)", name, iCter, fVal);
  flog('.', str);

  self = (BeamMon *) cntrData->pData;
@@ -487,6 +606,7 @@ static int MonSet(CounterDriver *cntrData, char *name, int iCter, float fVal) {

 static int MonGet(CounterDriver *cntrData, char *name, int iCter, float *fVal) {
  BeamMon *self = NULL;
+  char str[100];

  self = (BeamMon *) cntrData->pData;
  if(strcasecmp(name,"threshold") == 0){
@@ -495,35 +615,28 @@ static int MonGet(CounterDriver *cntrData, char *name, int iCter, float *fVal) {
  }
  /* TODO*/

-  char str[100];
-  snprintf(str, 100, "MonGet(%s, %d, %f)", name, iCter, *fVal);
+  (void) snprintf(str, 100, "MonGet(%s, %d, %f)", name, iCter, *fVal);
  flog('.', str);
  return SUCCESS;
 }

-static int MonSend(CounterDriver *cntrData, char *pText, char *pReply, int iReplyLen) {
-  BeamMon *self = NULL;
-  int status;
-
-  self = (BeamMon *) cntrData->pData;
-  MonDrainInput(cntrData);
-  MonWrite(self, pText);
-  if ((status = MonRead(self, pReply, &iReplyLen)) == SUCCESS)
-  {
-    pReply[iReplyLen] = '\0'; 
-    return SUCCESS;
-  }
-  return status;
-}
-
-static void KillMon(pCounterDriver cntrData) {
-  pBeamMon self = NULL;
-  self = (pBeamMon) cntrData->pData;
-  if (self) {
-    if (self->host)
+static void KillMon(/*@null@*/ pCounterDriver cntrData) {
+  if (cntrData != NULL) {
+    if (cntrData->pData != NULL) {
+      pBeamMon self = (pBeamMon) cntrData->pData;
+      if (self->host) {
        free(self->host);
-    if (self->errorMsg)
+        self->host = NULL;
+      }
+      if (self->errorMsg) {
        free(self->errorMsg);
+        self->errorMsg = NULL;
+      }
+      KillRS232(self->controller);
+      free(cntrData->pData);
+      cntrData->pData = NULL;
+    }
+    /* TODO free(cntrData); */
  }
 }

@@ -541,17 +654,17 @@ static void KillMon(pCounterDriver cntrData) {

  controller=createRS232(host,port);
  if (controller==NULL)  {
-    snprintf(pError, ERRLEN,
+    (void) snprintf(pError, ERRLEN,
        "ERROR: failed to create controller for %s at port %d",
        host, port);
-    SCWrite(pCon,pError,eError);
+    (void) SCWrite(pCon,pError,eError);
    return NULL;
  }
  if ( initRS232(controller) != 1) {
-    snprintf(pError, ERRLEN,
+    (void) snprintf(pError, ERRLEN,
        "ERROR: failed to connect to %s at port %d",
        host, port);
-    SCWrite(pCon,pError,eError);
+    (void) SCWrite(pCon,pError,eError);
    KillRS232(controller);
    return NULL;
  }
@@ -614,13 +727,19 @@ static void KillMon(pCounterDriver cntrData) {
    KillMon(pCntDriv);
    return NULL;
  }
-  sscanf(pPtr,"%d", &newCtr->iPort);
+  (void) sscanf(pPtr,"%d", &newCtr->iPort);
+
  if ((pPtr=getParam(pCon, interp, params,"host",1)) == NULL) {
    KillMon(pCntDriv);
    return NULL;
  }
+  /*@-mustfreeonly@ host = NULL after BeamMon is created */
  newCtr->host = strdup(pPtr);
+  /*@+mustfreeonly@*/
+
+  /*@-mustfreeonly@ controller = NULL after BeamMon is created */
  newCtr->controller = MonConnect(pCon, newCtr->host, newCtr->iPort);
+  /*@+mustfreeonly@*/

  newCtr->dummy_threshold = 1.7e6;
  return pCntDriv;