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From 2555bd3bad9ea8e7ae40a727f59bb546d2aa2717 Mon Sep 17 00:00:00 2001
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From: Karel Zak <kzak@redhat.com>
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Date: Fri, 28 Mar 2014 10:36:05 +0100
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Subject: [PATCH 69/84] findfs: add ability to work with PART{UUID,LABEL}= too
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Upstream: http://github.com/karelzak/util-linux/commit/c48508c2faa356c48c26d7d0070a6f20ae4ba9a0
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Addresses: http://bugzilla.redhat.com/show_bug.cgi?id=1335671
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Signed-off-by: Karel Zak <kzak@redhat.com>
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---
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 misc-utils/findfs.8 | 51 +++++++++++++++++++++++++++++++++++++++------------
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 misc-utils/findfs.c | 17 +++++------------
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 2 files changed, 44 insertions(+), 24 deletions(-)
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diff --git a/misc-utils/findfs.8 b/misc-utils/findfs.8
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index 8a6bca1..b92cd45 100644
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--- a/misc-utils/findfs.8
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+++ b/misc-utils/findfs.8
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@@ -7,19 +7,45 @@
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 findfs \- find a filesystem by label or UUID
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 .SH SYNOPSIS
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 .B findfs
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-.BI LABEL= label
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-.sp
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-.B findfs
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-.BI UUID= uuid
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+.BI NAME= value
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 .SH DESCRIPTION
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 .B findfs
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-will search the disks in the system looking for a filesystem which has
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-a label matching
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-.I label
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-or a UUID equal to
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-.IR uuid .
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-If the filesystem is found, the device name for the filesystem will
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-be printed on stdout.
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+will search the block devices in the system looking for a filesystem or
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+partition with specified tag. The currently supported tags are:
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+.TP
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+.B LABEL=<label>
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+Specifies filesystem label.
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+.TP
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+.B UUID=<uuid>
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+Specifies filesystem UUID.
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+.TP
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+.B PARTUUID=<uuid>
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+Specifies partition UUID. This partition identifier is supported for example for
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+GUID  Partition  Table (GPT) partition tables.
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+.TP
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+.B PARTLABEL=<label>
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+Specifies partition label (name). The partition labels are supported for example for
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+GUID Partition Table (GPT) or MAC partition tables.
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+.PP
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+If the filesystem or partition is found, the device name will be printed on
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+stdout.
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+
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+The complete overview about filesystems and partitions you can get for example
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+by
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+.RS
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+
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+.br
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+.BI "lsblk \-\-fs"
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+.br
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+
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+.BI "partx --show <disk>"
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+.br
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+
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+.BI blkid
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+.br
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+
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+.RE
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+
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 .PP
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 .SH AUTHOR
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 .B findfs
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@@ -30,7 +56,8 @@ the util-linux package by Karel Zak (kzak@redhat.com).
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 enables debug output.
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 .SH SEE ALSO
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 .BR blkid (8),
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-.BR fsck (8)
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+.BR lsblk (8),
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+.BR partx (8)
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 .SH AVAILABILITY
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 The findfs command is part of the util-linux package and is available from
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 ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
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diff --git a/misc-utils/findfs.c b/misc-utils/findfs.c
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index bc4a843..29ca1cb 100644
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--- a/misc-utils/findfs.c
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+++ b/misc-utils/findfs.c
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@@ -19,8 +19,7 @@ static void __attribute__((__noreturn__)) usage(int rc)
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 {
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 	FILE *out = rc ? stderr : stdout;
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 	fputs(USAGE_HEADER, out);
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-	fprintf(out, _(" %1$s [options] LABEL=<label>\n"
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-		       " %1$s [options] UUID=<uuid>\n"),
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+	fprintf(out, _(" %s [options] {LABEL,UUID,PARTUUID,PARTLABEL}=<value>\n"),
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 		program_invocation_short_name);
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 	fputs(USAGE_OPTIONS, out);
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 	fputs(USAGE_HELP, out);
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@@ -31,7 +30,7 @@ static void __attribute__((__noreturn__)) usage(int rc)
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 int main(int argc, char **argv)
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 {
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-	char	*dev, *tk, *vl;
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+	char	*dev;
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 	setlocale(LC_ALL, "");
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 	bindtextdomain(PACKAGE, LOCALEDIR);
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@@ -43,23 +42,17 @@ int main(int argc, char **argv)
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 		 * with version from e2fsprogs */
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 		usage(2);
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-	if (!strncmp(argv[1], "LABEL=", 6)) {
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-		tk = "LABEL";
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-		vl = argv[1] + 6;
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-	} else if (!strncmp(argv[1], "UUID=", 5)) {
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-		tk = "UUID";
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-		vl = argv[1] + 5;
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-	} else if (strcmp(argv[1], "-V") == 0 ||
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+	if (strcmp(argv[1], "-V") == 0 ||
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 		   strcmp(argv[1], "--version") == 0) {
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 		printf(UTIL_LINUX_VERSION);
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 		return EXIT_SUCCESS;
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 	} else if (strcmp(argv[1], "-h") == 0 ||
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 		   strcmp(argv[1], "--help") == 0) {
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 		usage(EXIT_SUCCESS);
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-	} else
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+	} else if (argv[1][0] == '-')
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 		usage(2);
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-	dev = blkid_evaluate_tag(tk, vl, NULL);
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+	dev = blkid_evaluate_tag(argv[1], NULL, NULL);
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 	if (!dev)
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 		errx(EXIT_FAILURE, _("unable to resolve '%s'"),	argv[1]);
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-- 
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2.7.4
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