Ensure that a device node is specified when invoking the identify or reset

commands.

Also improve the checking of device node names, so that better error
messages are displayed when incorrect names are specified.

Sponsored by:	Intel
MFC after:	3 days

3 files changed, 27 insertions, 3 deletions

diff --git a/sbin/nvmecontrol/identify.c b/sbin/nvmecontrol/identify.c
index cd1d746..c405508 100644
--- a/sbin/nvmecontrol/identify.c
+++ b/sbin/nvmecontrol/identify.c
@@ -200,6 +200,10 @@ identify_ctrlr(int argc, char *argv[])
 		}
 	}
 
+	/* Check that a controller was specified. */
+	if (optind >= argc)
+		identify_usage();
+
 	open_dev(argv[optind], &fd, 1, 1);
 	read_controller_data(fd, &cdata);
 	close(fd);
@@ -245,6 +249,10 @@ identify_ns(int argc, char *argv[])
 		}
 	}
 
+	/* Check that a namespace was specified. */
+	if (optind >= argc)
+		identify_usage();
+
 	/*
 	 * Check if the specified device node exists before continuing.
 	 *  This is a cleaner check for cases where the correct controller
diff --git a/sbin/nvmecontrol/nvmecontrol.c b/sbin/nvmecontrol/nvmecontrol.c
index af5e148..b95ff32 100644
--- a/sbin/nvmecontrol/nvmecontrol.c
+++ b/sbin/nvmecontrol/nvmecontrol.c
@@ -126,10 +126,22 @@ open_dev(const char *str, int *fd, int show_error, int exit_on_error)
 	struct stat	devstat;
 	char		full_path[64];
 
+	if (!strnstr(str, NVME_CTRLR_PREFIX, strlen(NVME_CTRLR_PREFIX))) {
+		if (show_error)
+			fprintf(stderr,
+			    "Controller/namespace IDs must begin with '%s'.\n",
+			    NVME_CTRLR_PREFIX);
+		if (exit_on_error)
+			exit(EX_USAGE);
+		else
+			return (EX_USAGE);
+	}
+
 	snprintf(full_path, sizeof(full_path), "/dev/%s", str);
 	if (stat(full_path, &devstat) != 0) {
 		if (show_error)
-			fprintf(stderr, "error\n");
+			fprintf(stderr, "Could not stat %s. errno=%d (%s)\n",
+			    full_path, errno, strerror(errno));
 		if (exit_on_error)
 			exit(EX_NOINPUT);
 		else
@@ -139,8 +151,8 @@ open_dev(const char *str, int *fd, int show_error, int exit_on_error)
 	*fd = open(full_path, O_RDWR);
 	if (*fd < 0) {
 		if (show_error)
-			printf("Could not open %s. errno=%d (%s)\n", full_path,
-			    errno, strerror(errno));
+			fprintf(stderr, "Could not open %s. errno=%d (%s)\n",
+			    full_path, errno, strerror(errno));
 		if (exit_on_error)
 			exit(EX_NOPERM);
 		else
diff --git a/sbin/nvmecontrol/reset.c b/sbin/nvmecontrol/reset.c
index f197145..a96722c 100644
--- a/sbin/nvmecontrol/reset.c
+++ b/sbin/nvmecontrol/reset.c
@@ -60,6 +60,10 @@ reset(int argc, char *argv[])
 		}
 	}
 
+	/* Check that a controller was specified. */
+	if (optind >= argc)
+		reset_usage();
+
 	open_dev(argv[optind], &fd, 1, 1);
 	if (ioctl(fd, NVME_RESET_CONTROLLER) < 0) {
 		printf("Reset request to %s failed. errno=%d (%s)\n",