nl: nl -v

Implement nl -v supporting negative and zero starting values.

2 files changed, 10 insertions, 4 deletions

diff --git a/tests/nl.test b/tests/nl.test
index 499734d3..046773f5 100755
--- a/tests/nl.test
+++ b/tests/nl.test
@@ -39,8 +39,13 @@ testing "-sook -b p" "nl -sook -bpoing" \
   "         one\n     1ookboing\n     2ooksproingy\n" \
   "" "one\nboing\nsproingy\n"
 
-testing "-v" "nl -v 42" "    42\tone\n    43\ttwo\n    44\tthree\n" \
+testing "-v42" "nl -v 42" "    42\tone\n    43\ttwo\n    44\tthree\n" \
   "" "one\ntwo\nthree\n"
+testing "-v-1" "nl -v -1" "    -1\tone\n     0\ttwo\n     1\tthree\n" \
+  "" "one\ntwo\nthree\n"
+testing "-v0" "nl -v 0" "     0\tone\n     1\ttwo\n     2\tthree\n" \
+  "" "one\ntwo\nthree\n"
+
 testing "-l" "nl -ba -l2 -w2 - input" \
   " 1\tone\n   \n 2\t\n 3\ttwo\n   \n 4\t\n   \n 5\tthree\n 6\tfour\n   \n 7\t\n   \n 8\tbang\n   \n" \
   "\n\nbang\n\n" "one\n\n\ntwo\n\n\n\nthree\nfour\n\n"
diff --git a/toys/posix/nl.c b/toys/posix/nl.c
index b9e60ae2..1b7b390a 100644
--- a/toys/posix/nl.c
+++ b/toys/posix/nl.c
@@ -5,15 +5,15 @@
  * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/nl.html
  *
  * This implements a subset: only one logical page (-ip), no sections (-dfh).
- * todo: -lv
+ * todo: -l
 
-USE_NL(NEWTOY(nl, "v#<1=1l#w#<0=6Eb:n:s:", TOYFLAG_USR|TOYFLAG_BIN))
+USE_NL(NEWTOY(nl, "v#=1l#w#<0=6Eb:n:s:", TOYFLAG_USR|TOYFLAG_BIN))
 
 config NL
   bool "nl"
   default y
   help
-    usage: nl [-E] [-l #] [-b MODE] [-n STYLE] [-s SEPARATOR] [-w WIDTH] [FILE...]
+    usage: nl [-E] [-l #] [-b MODE] [-n STYLE] [-s SEPARATOR] [-v #] [-w WIDTH] [FILE...]
 
     Number lines of input.
 
@@ -22,6 +22,7 @@ config NL
     -l	Only count last of this many consecutive blank lines
     -n	Number STYLE: ln (left justified) rn (right justified) rz (zero pad)
     -s	Separator to use between number and line (instead of TAB)
+    -v	Starting line number for each section (default 1)
     -w	Width of line numbers (default 6)
 */