Finished the work to allow scancel to select jobs by wckey

doc/man/man1/scancel.1

@@ -84,7 +84,7 @@ Print additional logging. Multiple v's increase logging detail.
 This option is incompatible with the \fB\-\-quiet\fR option.
 
 .TP
-\fB\-V\fR, \fB\-\-Version\fR
+\fB\-V\fR, \fB\-\-version\fR
 Print the version number of the scancel command. 
 
 .TP
@@ -94,6 +94,11 @@ a comma\-separated list of hosts, a range of hosts (host[1\-5,7,...] for
 example), or a filename. The host list will be assumed to be a filename only 
 if it contains a "/" character. 
 
+.TP
+\fB\-\-wckey\fR=\fIwckey\fR
+Restrict the scancel operation to jobs using this workload
+characterization key.
+
 .TP
 ARGUMENTS
 
@@ -153,6 +158,9 @@ environment variables, along with their corresponding options, are listed below.
 \fBSCANCEL_VERBOSE\fR
 \fB\-v\fR, \fB\-\-verbose\fR
 .TP 20
+\fBSCANCEL_WCKEY\fR
+\fB\-\-wckey\fR=\fIwckey\fR
+.TP 20
 \fBSLURM_CONF\fR
 The location of the SLURM configuration file.
 

src/scancel/scancel.c

@@ -116,7 +116,8 @@ main (int argc, char *argv[])
 	    (opt.partition) ||
 	    (opt.qos) ||
 	    (opt.state != JOB_END) ||
-	    (opt.user_name)) {
+	    (opt.user_name) ||
+	    (opt.wckey)) {
 		_filter_job_records ();
 	}
 	_cancel_jobs ();
@@ -248,6 +249,24 @@ _filter_job_records (void)
 			}
 		}
 
+		if (opt.wckey != NULL) {
+			char *job_key = job_ptr[i].wckey;
+
+			/*
+			 * A wckey that begins with '*' indicates that the wckey
+			 * was applied by default.  When the --wckey option does
+			 * not begin with a '*', act on all wckeys with the same
+			 * name, default or not.
+			 */
+			if ((opt.wckey[0] != '*') && (job_key[0] == '*'))
+				job_key++;
+
+			if (strcmp(job_key, job_ptr[i].wckey) != 0) {
+				job_ptr[i].job_id = 0;
+				continue;
+			}
+		}
+
 		if (opt.job_cnt == 0)
 			continue;
 		for (j = 0; j < opt.job_cnt; j++) {