new

src/cmd/ndb/ndbquery.c

@@ -0,0 +1,81 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <ndb.h>
+
+/*
+ *  search the database for matches
+ */
+void
+usage(void)
+{
+	fprint(2, "usage: query attr value [returned attribute]\n");
+	exits("usage");
+}
+
+void
+search(Ndb *db, char *attr, char *val, char *rattr)
+{
+	Ndbs s;
+	Ndbtuple *t;
+	Ndbtuple *nt;
+	char *p;
+
+	if(rattr){
+		p = ndbgetvalue(db, &s, attr, val, rattr, nil);
+		if(p){
+			print("%s\n", p);
+			free(p);
+		}
+		return;
+	}
+
+	t = ndbsearch(db, &s, attr, val);
+	while(t){
+		for(nt = t; nt; nt = nt->entry)
+			print("%s=%s ", nt->attr, nt->val);
+		print("\n");
+		ndbfree(t);
+		t = ndbsnext(&s, attr, val);
+	}
+}
+
+void
+main(int argc, char **argv)
+{
+	char *rattr = 0;
+	Ndb *db;
+	char *dbfile = 0;
+	int reps = 1;
+
+	ARGBEGIN{
+	case 'f':
+		dbfile = ARGF();
+		break;
+	}ARGEND;
+
+	switch(argc){
+	case 4:
+		reps = atoi(argv[3]);
+		/* fall through */
+	case 3:
+		rattr = argv[2];
+		break;
+	case 2:
+		rattr = 0;
+		break;
+	default:
+		usage();
+	}
+	
+	db = ndbopen(dbfile);
+	if(db == 0){
+		fprint(2, "no db files\n");
+		exits("no db");
+	}
+	while(reps--)
+		search(db, argv[0], argv[1], rattr);
+	ndbclose(db);
+
+	exits(0);
+}