modify darshan-job-summary.pl to use darshan-parser directly

git-svn-id: https://svn.mcs.anl.gov/repos/darshan/trunk@264 3b7491f3-a168-0410-bf4b-c445ed680a29

util/bin/darshan-job-summary.pl

@@ -29,7 +29,19 @@ my %hash_files = ();
 
 process_args();
 
-open(TRACE, $input_file) || die("can't open $input_file for processing: $!\n");
+# find a darshan-parser executable somewhere
+my $darshan_parser = "";
+if(-x "$FindBin::Bin/../bin/darshan-parser")
+{
+    $darshan_parser = "$FindBin::Bin/../bin/darshan-parser";
+}
+else
+{
+    $darshan_parser = "darshan-parser";
+}
+
+open(TRACE, "$darshan_parser $input_file |") || die("Can't execute \"$darshan_parser $input_file\": $!\n");
+
 open(FA_READ, ">$tmp_dir/file-access-read.dat") || die("error opening output file: $!\n");
 open(FA_WRITE, ">$tmp_dir/file-access-write.dat") || die("error opening output file: $!\n");
 open(FA_READ_SH, ">$tmp_dir/file-access-read-sh.dat") || die("error opening output file: $!\n");
@@ -225,7 +237,7 @@ while ($line = <TRACE>) {
 
 # process last file record
 process_file_record($current_rank, $current_hash, \%file_record_hash);
-close(TRACE);
+close(TRACE) || die "darshan-parser failure: $! $?";
 
 # Fudge one point at the end to make xrange match in read and write plots.
 # For some reason I can't get the xrange command to work.  -Phil
@@ -950,9 +962,8 @@ Usage: $PROGRAM_NAME <options> input_file
                     (defaults to ./summary.pdf)
 Purpose:
 
-    This script reads a Darshan output file in text format (as 
-    produced by the darshan-parser utility) and generates a pdf file 
-    summarizing job behavior.
+    This script reads a Darshan output file generated by a job and
+    generates a pdf file summarizing job behavior.
 
 EOF
     return;