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authornoname <noname@inventati.org>2014-04-23 00:26:07 +0400
committerRoberto E. Vargas Caballero <k0ga@shike2.com>2014-04-23 20:31:45 +0200
commitf9dc374ea01c2921ec3bd1214f292a7036d069ae (patch)
tree55e08f8425b5b1108d9454b845182e3207383f98
parentfa19f241a34deddf6e089ab462cbd9cb02f61b3d (diff)
downloadst-f9dc374ea01c2921ec3bd1214f292a7036d069ae.tar.gz
Fix techo handling of control and multibyte characters.
techo compares signed char to '\x20'. Any character with code less then '\x20' is treated as control character. This way characters with MSB set to 1 are considered control characters too. Also this patch makes techo display DEL character as ^?. To reprocuce the bug, enable echo mode using printf '\e[12l', then type DEL character or any non-ASCII character.
-rw-r--r--st.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/st.c b/st.c
index aba034f..b66791a 100644
--- a/st.c
+++ b/st.c
@@ -2308,9 +2308,9 @@ techo(char *buf, int len) {
for(; len > 0; buf++, len--) {
char c = *buf;
- if(c < '\x20') { /* control code */
+ if(c < 0x20 || c == 0177) { /* control code */
if(c != '\n' && c != '\r' && c != '\t') {
- c |= '\x40';
+ c ^= '\x40';
tputc("^", 1);
}
tputc(&c, 1);