osmocom
/
libosmocore
mirror of https://gerrit.osmocom.org/libosmocore
11
0
Fork 0
Code Issues Releases Wiki Activity

vty: clear screen with ^L 

Use ANSI escape characters to clear the screen with ^L, like it works
in typical Linux shells. I always found it slightly inconvenient that
this didn't work in the VTY.

Change-Id: Ie2356cd92f39b4dc28b5c20bbe4557fb0d972747
This commit is contained in:
Oliver Smith 2021-07-22 20:24:00 +02:00 committed by osmith
parent 466be65176
commit 053ad96600
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/vty/vty.c
View File

@ -459,6 +459,7 @@ static int vty_command(struct vty *vty)
static const char telnet_backward_char = 0x08;
static const char telnet_space_char = ' ';
static const char telnet_escape_char = 0x1B;
/* Basic function to write buffer to vty. */
static void vty_write(struct vty *vty, const char *buf, size_t nbytes)
@ -858,6 +859,19 @@ static void vty_down_level(struct vty *vty)
vty->cp = 0;
}
/* When '^L' is typed, clear all lines above the current one. */
static void vty_clear_screen(struct vty *vty)
{
vty_out(vty, "%c%s%c%s",
telnet_escape_char,
"[2J", /* Erase Screen */
telnet_escape_char,
"[H" /* Cursor Home */
);
vty_prompt(vty);
vty_redraw_line(vty);
}
/* When '^Z' is received from vty, move down to the enable mode. */
static void vty_end_config(struct vty *vty)
{
@ -1402,6 +1416,9 @@ int vty_read(struct vty *vty)
case CONTROL('K'):
vty_kill_line(vty);
break;
case CONTROL('L'):
vty_clear_screen(vty);
break;
case CONTROL('N'):
vty_next_line(vty);
break;