before:
$ env -i PS1='\141' ksh -i</dev/null|vis -clt
\
after:
$ env -i PS1='\141' ksh -i</dev/null|vis -clt
a\
Index: src/bin/ksh/lex.c
===================================================================
RCS file: /cvs/src/bin/ksh/lex.c,v
retrieving revision 1.46
diff -p -u -r1.46 lex.c
--- src/bin/ksh/lex.c 20 Jan 2013 14:47:46 -0000 1.46
+++ src/bin/ksh/lex.c 2 Mar 2013 18:30:06 -0000
@@ -5,8 +5,8 @@
*/
#include "sh.h"
-#include <libgen.h>
#include <ctype.h>
+#include <libgen.h>
/* Structure to keep track of the lexing state and the various pieces of info
@@ -1349,17 +1349,18 @@ dopprompt(const char *sp, int ntruncate,
case '4':
case '5':
case '6':
- case '7':
- if ((cp[1] > '7' || cp[1] < '0') ||
- (cp[2] > '7' || cp[2] < '0')) {
- snprintf(strbuf, sizeof strbuf,
- "\\%c", *cp);
- break;
- }
- n = cp[0] * 8 * 8 + cp[1] * 8 + cp[2];
- snprintf(strbuf, sizeof strbuf, "%c", n);
- cp += 2;
+ case '7': {
+ int i = 3;
+ char c = 0;
+
+ do
+ c = (c << 3) + *cp - '0';
+ while (--i && *++cp >= '0' && *cp <= '7');
+ cp -= !!i;
+ strbuf[0] = c;
+ strbuf[1] = '\0';
break;
+ }
case '\\': /* '\' '\' */
strbuf[0] = '\\';
strbuf[1] = '\0';
