From: cgoesche <cgoesc2@wgu.edu>
Date: Sat, 23 Aug 2025 00:26:07 +0000 (-0400)
Subject: lsblk: add support for LSBLK_COLUMNS environmental variable as an alternative to... 
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=80fcb7a5f65b68919cb4390a606ef4a3dbbca5b4;p=thirdparty%2Futil-linux.git

lsblk: add support for LSBLK_COLUMNS environmental variable as an alternative to --output

Addresses: #2816
Signed-off-by: Christian Goeschel Ndjomouo <cgoesc2@wgu.edu>
---

diff --git a/misc-utils/lsblk.8.adoc b/misc-utils/lsblk.8.adoc
index 04efa276c..4fc6cc6b5 100644
--- a/misc-utils/lsblk.8.adoc
+++ b/misc-utils/lsblk.8.adoc
@@ -234,6 +234,9 @@ enables *libsmartcols* debug output.
 *LIBSMARTCOLS_DEBUG_PADDING*=on::
 use visible padding characters.
 
+*LSBLK_COLUMNS*=::
+specifies a comma-separated list of output columns to print. All columns listed by *--list-columns* can be used.
+
 == NOTES
 
 For partitions, some information (e.g., queue attributes) is inherited from the parent device.
diff --git a/misc-utils/lsblk.c b/misc-utils/lsblk.c
index 06a206cb9..c054c23b4 100644
--- a/misc-utils/lsblk.c
+++ b/misc-utils/lsblk.c
@@ -2714,6 +2714,7 @@ int main(int argc, char *argv[])
 		add_column(COL_TARGETS);
 	}
 
+	outarg = outarg == NULL ? getenv("LSBLK_COLUMNS") : outarg;
 	if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
 					 &ncolumns, column_name_to_id) < 0)
 		return EXIT_FAILURE;