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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.
This commit is contained in:
noname 2014-04-23 00:26:07 +04:00 committed by Roberto E. Vargas Caballero
parent fa19f241a3
commit f9dc374ea0
1 changed files with 2 additions and 2 deletions
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4
st.c
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@ -2308,9 +2308,9 @@ techo(char *buf, int len) {
for(; len > 0; buf++, len--) { for(; len > 0; buf++, len--) {
char c = *buf; char c = *buf;
if(c < '\x20') { /* control code */ if(c < 0x20 || c == 0177) { /* control code */
if(c != '\n' && c != '\r' && c != '\t') { if(c != '\n' && c != '\r' && c != '\t') {
c |= '\x40'; c ^= '\x40';
tputc("^", 1); tputc("^", 1);
} }
tputc(&c, 1); tputc(&c, 1);