591acea2b1a33f27d0fef4323cfaed0a7c50749b
hiram
  Fri Oct 2 13:19:22 2015 -0700
fixup gcc warnings for -Wunused-but-set-variable refs #16121

diff --git src/parasol/paraNodeStart/paraNodeStart.c src/parasol/paraNodeStart/paraNodeStart.c
index 8ae4ded..e7bf256 100644
--- src/parasol/paraNodeStart/paraNodeStart.c
+++ src/parasol/paraNodeStart/paraNodeStart.c
@@ -1,116 +1,116 @@
 /* paraNodeStart - Start up parasol node daemons on a list of machines. */
 #include "paraCommon.h"
 #include "linefile.h"
 #include "dystring.h"
 #include "hash.h"
 #include "options.h"
 
 /* command line option specifications */
 static struct optionSpec optionSpecs[] = {
     {"logFacility", OPTION_STRING},
     {"logMinPriority", OPTION_STRING},
     {"log", OPTION_STRING},
     {"hub", OPTION_STRING},
     {"umask", OPTION_INT},
     {"userPath", OPTION_STRING},
     {"sysPath", OPTION_STRING},
     {"env", OPTION_STRING|OPTION_MULTI},
     {"randomDelay", OPTION_INT},
     {"exe", OPTION_STRING},
     {"rsh", OPTION_STRING},
     {NULL, 0}
 };
 
 char *version = PARA_VERSION;   /* Version number. */
 
 void usage()
 /* Explain usage and exit. */
 {
 errAbort(
  "paraNodeStart - version %s\n"
  "Start up parasol node daemons on a list of machines.\n"
  "usage:\n"
  "    paraNodeStart machineList\n"
  "where machineList is a file containing a list of hosts.\n"
  "Machine list contains the following columns:\n"
  "     <name> <number of cpus>\n"
  "It may have other columns as well.\n"
  "options:\n"
  "    -exe=/path/to/paraNode\n"
  "    -logFacility=facility  Log to the specified syslog facility - default local0.\n"
  "    -logMinPriority=pri minimum syslog priority to log, also filters file logging.\n"
  "     defaults to \"warn\"\n"
  "    -log=file  Log to file instead of syslog.\n"
  "    -umask=000  Set umask to run under - default 002.\n"
  "    -randomDelay=N  Set random start delay in milliseconds - default 5000.\n"
  "    -userPath=bin:bin/i386  User dirs to add to path.\n"
  "    -sysPath=/sbin:/local/bin  System dirs to add to path.\n"
  "    -env=name=value - add environment variable to jobs.  Maybe repeated.\n"
  "    -hub=machineHostingParaHub  Nodes will ignore messages from elsewhere.\n"
  "    -rsh=/path/to/rsh/like/command.\n"
  , version
  );
 }
 
 void carryOption(char *option, struct dyString *dy)
 /* Carry option from our command line to paraNode's. */
 {
 char *val = optionVal(option, NULL);
 if (val != NULL)
    dyStringPrintf(dy, " %s=%s", option, val);
 }
 
 void carryMultiOption(char *option, struct dyString *dy)
 /* Carry multi-valued option from our command line to paraNode's. Do
  * naive quoting */
 {
 struct slName *val;
 for (val = optionMultiVal(option, NULL); val != NULL; val = val->next)
     dyStringPrintf(dy, " %s='%s'", option, val->name);
 }
 
 void paraNodeStart(char *machineList)
 /* Start node servers on all machines in list. */
 {
 char *exe = optionVal("exe", "paraNode");
 char *rsh = optionVal("rsh", "rsh");
 struct lineFile *lf = lineFileOpen(machineList, TRUE);
 char *row[2];
 struct dyString *dy = newDyString(256);
 
 while (lineFileRow(lf, row))
     {
     char *name = row[0];
     int cpu = atoi(row[1]);
     if (cpu <= 0)
         errAbort("Expecting cpu count in second column, line %d of %s\n",
 		lf->lineIx, lf->fileName);
     dyStringClear(dy);
     dyStringPrintf(dy, "%s %s %s start -cpu=%d", rsh, name, exe, cpu);
     carryOption("logFacility", dy);
     carryOption("logMinPriority", dy);
     carryOption("log", dy);
     carryOption("hub", dy);
     carryOption("umask", dy);
     carryOption("sysPath", dy);
     carryOption("userPath", dy);
     carryMultiOption("env", dy);
     carryOption("randomDelay", dy);
     printf("%s\n", dy->string);
-    system(dy->string);
+    (void) system(dy->string); // ignore return value
     }
 lineFileClose(&lf);
 freeDyString(&dy);
 }
 
 int main(int argc, char *argv[])
 /* Process command line. */
 {
 optionInit(&argc, argv, optionSpecs);
 if (argc != 2)
     usage();
 paraNodeStart(argv[1]);
 return 0;
 }