C example: Setting the attributes of a queue

This example demonstrates how to use the MQSET call to change the attributes of a queue.

This extract is taken from the Queue Attributes sample application. [z/OS] For IBM® MQ for z/OS® this is program CSQ4CCC1.

For the names and locations of the sample applications, see the following topics:

#include <cmqc.h>      /* MQ API header file      */
⋮
#define NUMBEROFSELECTORS  2
 
const MQHCONN Hconn = MQHC_DEF_HCONN;
 
static void InhibitGetAndPut(char   *Message,
                             PMQHOBJ pHobj,
                             char   *Object)
   {
   /*                                                    */
   /*      Declare local variables                       */
   /*                                                    */
   MQLONG  SelectorCount = NUMBEROFSELECTORS;
                                 /* Number of selectors  */
   MQLONG  IntAttrCount  = NUMBEROFSELECTORS;
                                 /* Number of int attrs  */
   MQLONG  CharAttrLength = 0;
                     /* Length of char attribute buffer  */
   MQCHAR *CharAttrs ;
                     /* Character attribute buffer       */
   MQLONG  SelectorsTable[NUMBEROFSELECTORS];
                                 /* attribute selectors  */
   MQLONG  IntAttrsTable[NUMBEROFSELECTORS];
                                 /* integer attributes   */
   MQLONG  CompCode;             /* Completion code      */
   MQLONG  Reason;               /* Qualifying reason    */
   ⋮
   /*                                                    */
   /*     Open the queue.  If successful, do the         */
   /*     inquire call.                                  */
   /*                                                    */
   ⋮
      /*                                                 */
      /*   Initialize the variables for the set call:    */
      /*    - Set SelectorsTable to the attributes to be */
      /*      set                                        */
      /*    - Set IntAttrsTable to the required status   */
      /*    - All other variables are already set        */
      /*                                                 */
      SelectorsTable[0] = MQIA_INHIBIT_GET;
      SelectorsTable[1] = MQIA_INHIBIT_PUT;
      IntAttrsTable[0]  = MQQA_GET_INHIBITED;
      IntAttrsTable[1]  = MQQA_PUT_INHIBITED;
      ⋮

      /*                                                 */
      /*   Issue the set call.                           */
      /*     Test the output of the set call.  If the    */
      /*     call fails, display an error message        */
      /*     showing the completion code and reason      */
      /*     code; otherwise move INHIBITED to the       */
      /*     relevant screen map fields                  */
      /*                                                 */
      MQSET(Hconn,
            *pHobj,
            SelectorCount,
            SelectorsTable,
            IntAttrCount,
            IntAttrsTable,
            CharAttrLength,
            CharAttrs,
            &CompCode,
            &Reason);
      if (CompCode != MQCC_OK)
         {
         sprintf(Message, MESSAGE_4_E,
                 ERROR_IN_MQSET, CompCode, Reason);
         SetMsg(Message);
         }
      else
         {
           /* Process the changes */
         } /* end if CompCode */