1 files changed, 121 insertions, 0 deletions
diff --git a/examples/display-columnar.c b/examples/display-columnar.c
new file mode 100644
index 0000000..db98bdf
--- /dev/null
+++ b/examples/display-columnar.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/**
+ * This file is part of libnvme.
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Authors: Keith Busch <keith.busch@wdc.com>
+ */
+
+/**
+ * display-columnar: Scans the nvme topology, prints each record type in a
+ * column format for easy visual scanning.
+ */
+#include <stdio.h>
+#include <inttypes.h>
+#include <libnvme.h>
+
+static const char dash[101] = {[0 ... 99] = '-'};
+int main()
+{
+	nvme_root_t r;
+	nvme_host_t h;
+	nvme_subsystem_t s;
+	nvme_ctrl_t c;
+	nvme_path_t p;
+	nvme_ns_t n;
+
+	r = nvme_scan(NULL);
+	if (!r)
+		return -1;
+
+
+	printf("%-16s %-96s %-.16s\n", "Subsystem", "Subsystem-NQN", "Controllers");
+	printf("%-.16s %-.96s %-.16s\n", dash, dash, dash);
+
+	nvme_for_each_host(r, h) {
+		nvme_for_each_subsystem(h, s) {
+			bool first = true;
+			printf("%-16s %-96s ", nvme_subsystem_get_name(s),
+			       nvme_subsystem_get_nqn(s));
+
+			nvme_subsystem_for_each_ctrl(s, c) {
+				printf("%s%s", first ? "": ", ",
+				       nvme_ctrl_get_name(c));
+				first = false;
+			}
+			printf("\n");
+		}
+	}
+	printf("\n");
+
+	printf("%-8s %-20s %-40s %-8s %-6s %-14s %-12s %-16s\n", "Device",
+		"SN", "MN", "FR", "TxPort", "Address", "Subsystem", "Namespaces");
+	printf("%-.8s %-.20s %-.40s %-.8s %-.6s %-.14s %-.12s %-.16s\n", dash, dash,
+		dash, dash, dash, dash, dash, dash);
+
+	nvme_for_each_host(r, h) {
+		nvme_for_each_subsystem(h, s) {
+			nvme_subsystem_for_each_ctrl(s, c) {
+				bool first = true;
+
+				printf("%-8s %-20s %-40s %-8s %-6s %-14s %-12s ",
+				       nvme_ctrl_get_name(c),
+				       nvme_ctrl_get_serial(c),
+				       nvme_ctrl_get_model(c),
+				       nvme_ctrl_get_firmware(c),
+				       nvme_ctrl_get_transport(c),
+				       nvme_ctrl_get_address(c),
+				       nvme_subsystem_get_name(s));
+
+				nvme_ctrl_for_each_ns(c, n) {
+					printf("%s%s", first ? "": ", ",
+					       nvme_ns_get_name(n));
+					first = false;
+				}
+
+				nvme_ctrl_for_each_path(c, p) {
+					printf("%s%s", first ? "": ", ",
+					       nvme_ns_get_name(nvme_path_get_ns(p)));
+					first = false;
+				}
+				printf("\n");
+			}
+		}
+	}
+	printf("\n");
+
+ 	printf("%-12s %-8s %-16s %-8s %-16s\n", "Device", "NSID", "Sectors", "Format", "Controllers");
+	printf("%-.12s %-.8s %-.16s %-.8s %-.16s\n", dash, dash, dash, dash, dash);
+
+	nvme_for_each_host(r, h) {
+		nvme_for_each_subsystem(h, s) {
+			nvme_subsystem_for_each_ctrl(s, c) {
+				nvme_ctrl_for_each_ns(c, n)
+					printf("%-12s %-8d %-16" PRIu64 " %-8d %s\n",
+					       nvme_ns_get_name(n),
+					       nvme_ns_get_nsid(n),
+					       nvme_ns_get_lba_count(n),
+					       nvme_ns_get_lba_size(n),
+					       nvme_ctrl_get_name(c));
+			}
+
+			nvme_subsystem_for_each_ns(s, n) {
+				bool first = true;
+
+				printf("%-12s %-8d %-16" PRIu64 " %-8d ",
+				       nvme_ns_get_name(n),
+				       nvme_ns_get_nsid(n),
+				       nvme_ns_get_lba_count(n),
+				       nvme_ns_get_lba_size(n));
+				nvme_subsystem_for_each_ctrl(s, c) {
+					printf("%s%s", first ? "" : ", ",
+					       nvme_ctrl_get_name(c));
+					first = false;
+				}
+				printf("\n");
+			}
+		}
+	}
+	return 0;
+}
+