ompi: fixup hostname max length usage

Signed-off-by: Karol Mroz <mroz.karol@gmail.com>

ompi/info/info.c

@@ -95,7 +95,7 @@ opal_pointer_array_t ompi_info_f_to_c_table = {{0}};
  */
 int ompi_info_init(void)
 {
-    char val[MPI_MAX_INFO_VAL];
+    char val[OPAL_MAXHOSTNAMELEN];
     char *cptr;
 
     /* initialize table */
@@ -134,7 +134,7 @@ int ompi_info_init(void)
     }
 
     /* local host name */
-    gethostname(val, MPI_MAX_INFO_VAL);
+    gethostname(val, sizeof(val));
     ompi_info_set(&ompi_mpi_info_env.info, "host", val);
 
     /* architecture name */

ompi/mca/pml/v/pml_v_output.c

@@ -21,7 +21,7 @@
 
 int pml_v_output_open(char *output, int verbosity) {
     opal_output_stream_t lds;
-    char hostname[32] = "NA";
+    char hostname[OPAL_MAXHOSTNAMELEN] = "NA";
 
     OBJ_CONSTRUCT(&lds, opal_output_stream_t);
     if(!output) {
@@ -40,7 +40,7 @@ int pml_v_output_open(char *output, int verbosity) {
             lds.lds_file_suffix = output;
         }
         lds.lds_is_debugging = true;
-        gethostname(hostname, 32);
+        gethostname(hostname, sizeof(hostname));
         asprintf(&lds.lds_prefix, "[%s:%05d] pml_v: ", hostname, getpid());
         lds.lds_verbose_level = verbosity;
         mca_pml_v.output = opal_output_open(&lds);

ompi/mpi/c/get_processor_name.c

@@ -66,7 +66,7 @@ int MPI_Get_processor_name(char *name, int *resultlen)
        Guard against gethostname() returning a *really long* hostname
        and not null-terminating the string.  The Fortran API version
        will pad to the right if necessary. */
-    gethostname(name, MPI_MAX_PROCESSOR_NAME - 1);
+    gethostname(name, (MPI_MAX_PROCESSOR_NAME - 1));
     name[MPI_MAX_PROCESSOR_NAME - 1] = '\0';
     *resultlen = (int) strlen(name);
 

ompi/runtime/ompi_mpi_abort.c

@@ -119,7 +119,7 @@ int
 ompi_mpi_abort(struct ompi_communicator_t* comm,
                int errcode)
 {
-    char *msg, *host, hostname[MAXHOSTNAMELEN];
+    char *msg, *host, hostname[OPAL_MAXHOSTNAMELEN];
     pid_t pid = 0;
 
     /* Protection for recursive invocation */

ompi/runtime/ompi_mpi_finalize.c

@@ -113,7 +113,7 @@ int ompi_mpi_finalize(void)
         /* Note that if we're not initialized or already finalized, we
            cannot raise an MPI exception.  The best that we can do is
            write something to stderr. */
-        char hostname[MAXHOSTNAMELEN];
+        char hostname[OPAL_MAXHOSTNAMELEN];
         pid_t pid = getpid();
         gethostname(hostname, sizeof(hostname));
 

ompi/tools/mpisync/sync.c

@@ -74,7 +74,7 @@ int main(int argc, char **argv)
     MPI_Comm comm = MPI_COMM_WORLD;
     int rank, commsize;
     double offs = 0, rtt = 0;
-    char hname[1024];
+    char hname[OPAL_MAXHOSTNAMELEN];
 
     MPI_Comm_rank(comm, &rank);
     MPI_Comm_size(comm, &commsize);
@@ -98,7 +98,7 @@ int main(int argc, char **argv)
         exit(1);
     }
 
-    if( gethostname(hname, 1024) ){
+    if( gethostname(hname, sizeof(hname)) ){
         perror("Cannot get hostname. Abort");
         MPI_Abort(MPI_COMM_WORLD, 1);
     }
@@ -129,13 +129,13 @@ int main(int argc, char **argv)
              fprintf(stderr, "Fail to allocate memory. Abort\n");
              MPI_Abort(MPI_COMM_WORLD, 1);
         }
-        char *hnames = malloc(1024*commsize);
+        char *hnames = malloc(OPAL_MAXHOSTNAMELEN * commsize);
         if( hnames == NULL ){
              fprintf(stderr, "Fail to allocate memory. Abort\n");
              MPI_Abort(MPI_COMM_WORLD, 1);
         }
 
-        MPI_Gather(hname,1024,MPI_CHAR,hnames,1024,MPI_CHAR, 0, MPI_COMM_WORLD);
+        MPI_Gather(hname,sizeof(hname),MPI_CHAR,hnames,sizeof(hname),MPI_CHAR, 0, MPI_COMM_WORLD);
         MPI_Gather(send,2,MPI_DOUBLE,measure,2, MPI_DOUBLE, 0, MPI_COMM_WORLD);
         char tmpname[128];
         FILE *fp = fopen(filename,"w");
@@ -144,7 +144,7 @@ int main(int argc, char **argv)
              MPI_Abort(MPI_COMM_WORLD, 1);
         }
         double (*m)[2] = (void*)measure;
-        char (*h)[1024] = (void*)hnames;
+        char (*h)[OPAL_MAXHOSTNAMELEN] = (void*)hnames;
         int i;
         fprintf(fp, "# Used algorithm: %s\n", (alg ? "binary tree" : "linear"));
         for(i=0; i<commsize;i++){
@@ -152,7 +152,7 @@ int main(int argc, char **argv)
         }
         fclose(fp);
     } else {
-        MPI_Gather(hname,1024, MPI_CHAR, NULL, 1024, MPI_CHAR, 0, MPI_COMM_WORLD);
+        MPI_Gather(hname, sizeof(hname), MPI_CHAR, NULL, sizeof(hname), MPI_CHAR, 0, MPI_COMM_WORLD);
         MPI_Gather(send,2, MPI_DOUBLE, NULL, 2, MPI_DOUBLE, 0, MPI_COMM_WORLD);
     }