ed: Use the variable LINES for z - sbase - suckless unix tools
HTML git clone git://git.suckless.org/sbase
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit 4bc4a1d030dead3308020db6fdddf4b042a83a7e
DIR parent 60d9f7a5a9f0b55660915b06fdc73db6811a9f9d
HTML Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date: Wed, 31 Dec 2025 12:38:39 +0100
ed: Use the variable LINES for z
Some shells keep a variable LINES with the number of lines of the terminal
updated in every SIGWINCH. Using that variable makes easier to get a
full listing.
Diffstat:
M ed.1 | 7 +++++--
M ed.c | 9 +++++++--
2 files changed, 12 insertions(+), 4 deletions(-)
---
DIR diff --git a/ed.1 b/ed.1
@@ -1,4 +1,4 @@
-.Dd December 27, 2025
+.Dd December 31, 2025
.Dt ED 1
.Os sbase
.Sh NAME
@@ -233,7 +233,10 @@ lines starting at the addressed line.
If
.Ar n
is not specified then
-it is defaulted to 24.
+the value of $LINES - 1 is used.
+If the value of
+.Ar n
+is 0 or negative then the default value of 23 is used.
.It ($)=
Print the line number of the addressed line.
The dot is unchanged.
DIR diff --git a/ed.c b/ed.c
@@ -1270,6 +1270,7 @@ subst(int nth)
static void
docmd(void)
{
+ char *var;
int cmd, c, line3, num, trunc;
repeat:
@@ -1406,10 +1407,14 @@ repeat:
case 'z':
if (nlines > 1)
goto bad_address;
+
+ num = 0;
if (isdigit(back(input())))
num = getnum();
- else
- num = 24;
+ else if ((var = getenv("LINES")) != NULL)
+ num = atoi(var) - 1;
+ if (num <= 0)
+ num = 23;
chkprint(1);
deflines(curln, curln);
scroll(num);