Illumos #1936: add support for "-t <datatype>" argument to zfs get

Reviewed by: Kartik Mistry <kartik@nexenta.com>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Richard Elling <richard.elling@gmail.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/1936

Ported by: Martin Matuska <martin@matuska.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #681

Author: Andrew Stormont

cmd/zfs/zfs_main.c

@@ -218,7 +218,8 @@ get_usage(zfs_help_t idx)
 		    "<filesystem|volume>@<snap>[%<snap>][,...]\n"));
 	case HELP_GET:
 		return (gettext("\tget [-rHp] [-d max] "
-		    "[-o \"all\" | field[,...]] [-s source[,...]]\n"
+		    "[-o \"all\" | field[,...]] [-t type[,...]] "
+		    "[-s source[,...]]\n"
 		    "\t    <\"all\" | property[,...]> "
 		    "[filesystem|volume|snapshot] ...\n"));
 	case HELP_INHERIT:
@@ -1460,6 +1461,7 @@ zfs_do_get(int argc, char **argv)
 {
 	zprop_get_cbdata_t cb = { 0 };
 	int i, c, flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
+	int types = ZFS_TYPE_DATASET;
 	char *value, *fields;
 	int ret = 0;
 	int limit = 0;
@@ -1476,7 +1478,7 @@ zfs_do_get(int argc, char **argv)
 	cb.cb_type = ZFS_TYPE_DATASET;
 
 	/* check options */
-	while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
+	while ((c = getopt(argc, argv, ":d:o:s:rt:Hp")) != -1) {
 		switch (c) {
 		case 'p':
 			cb.cb_literal = B_TRUE;
@@ -1594,6 +1596,37 @@ zfs_do_get(int argc, char **argv)
 			}
 			break;
 
+		case 't':
+			types = 0;
+			flags &= ~ZFS_ITER_PROP_LISTSNAPS;
+			while (*optarg != '\0') {
+				static char *type_subopts[] = { "filesystem",
+				    "volume", "snapshot", "all", NULL };
+
+				switch (getsubopt(&optarg, type_subopts,
+				    &value)) {
+				case 0:
+					types |= ZFS_TYPE_FILESYSTEM;
+					break;
+				case 1:
+					types |= ZFS_TYPE_VOLUME;
+					break;
+				case 2:
+					types |= ZFS_TYPE_SNAPSHOT;
+					break;
+				case 3:
+					types = ZFS_TYPE_DATASET;
+					break;
+
+				default:
+					(void) fprintf(stderr,
+					    gettext("invalid type '%s'\n"),
+					    value);
+					usage(B_FALSE);
+				}
+			}
+			break;
+
 		case '?':
 			(void) fprintf(stderr, gettext("invalid option '%c'\n"),
 			    optopt);
@@ -1637,7 +1670,7 @@ zfs_do_get(int argc, char **argv)
 	cb.cb_first = B_TRUE;
 
 	/* run for each object */
-	ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
+	ret = zfs_for_each(argc, argv, flags, types, NULL,
 	    &cb.cb_proplist, limit, get_callback, &cb);
 
 	if (cb.cb_proplist == &fake_name)

man/man8/zfs.8

@@ -1,6 +1,7 @@
 '\" te
 .\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
 .\" Copyright (c) 2011 by Delphix. All rights reserved.
+.\" Copyright (c) 2012 Nexenta Systems, Inc. All Rights Reserved.
 .\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License. You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
 .\"  See the License for the specific language governing permissions and limitations under the License. When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with
@@ -84,8 +85,8 @@ zfs \- configures ZFS file systems
 
 .LP
 .nf
-\fBzfs\fR \fBget\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR][\fB-Hp\fR][\fB-o\fR \fIfield\fR[,...]] [\fB-s\fR \fIsource\fR[,...]]
-     "\fIall\fR" | \fIproperty\fR[,...] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR ...
+\fBzfs\fR \fBget\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR][\fB-Hp\fR][\fB-o\fR \fIfield\fR[,...]] [\fB-t\fR \fItype\fR[,...]] 
+    [\fB-s\fR \fIsource\fR[,...]] "\fIall\fR" | \fIproperty\fR[,...] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR ...
 .fi
 
 .LP
@@ -1765,7 +1766,7 @@ Sets the property to the given value for each dataset. Only some properties can
 .ne 2
 .mk
 .na
-\fB\fBzfs get\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR] [\fB-Hp\fR] [\fB-o\fR \fIfield\fR[,...] [\fB-s\fR \fIsource\fR[,...] "\fIall\fR" | \fIproperty\fR[,...] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR ...\fR
+\fB\fBzfs get\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR] [\fB-Hp\fR] [\fB-o\fR \fIfield\fR[,...] [\fB-t\fR \fItype\fR[,...]] [\fB-s\fR \fIsource\fR[,...] "\fIall\fR" | \fIproperty\fR[,...] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR ...\fR
 .ad
 .sp .6
 .RS 4n