From: YuriyRyabikov <22548029+kurok@users.noreply.github.com>
Date: Fri, 13 Mar 2026 17:12:14 +0000 (+0000)
Subject: pager: support --header 0,M for column-only freezing
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fdb52e499cd260070ed6094169dac67bfe49f2fe;p=thirdparty%2Futil-linux.git

pager: support --header 0,M for column-only freezing

less accepts --header 0,M to freeze columns without header lines.
Handle header_width > 0 independently of header_lines.
---

diff --git a/lib/pager.c b/lib/pager.c
index 355defaf7..c2efb91bc 100644
--- a/lib/pager.c
+++ b/lib/pager.c
@@ -68,6 +68,11 @@ static void pager_preexec(void)
 			 "%s --header %d,%d",
 			 less_env ? less_env : "FRSX",
 			 header_lines, header_width);
+	else if (header_width > 0)
+		snprintf(less_val, sizeof(less_val),
+			 "%s --header 0,%d",
+			 less_env ? less_env : "FRSX",
+			 header_width);
 	else if (header_lines > 0)
 		snprintf(less_val, sizeof(less_val),
 			 "%s --header %d",
@@ -269,8 +274,8 @@ void pager_open(void)
  * number of header lines to freeze (typically 1 for table header).
  * The @first_col_width specifies the number of character columns to
  * freeze (width of first column including separator), or 0 to not
- * freeze any column. If @header_lines is 0, no header freezing takes
- * place regardless of @first_col_width.
+ * freeze any column. Either parameter can be 0 independently;
+ * less supports --header 0,M to freeze columns without header lines.
  */
 void pager_open_header(int header_lines, int first_col_width)
 {