libbb: document that we maybe will want to understand \e someday

 (no code changes)

diff --git a/libbb/process_escape_sequence.c b/libbb/process_escape_sequence.c
index 4d03bd6..6de2cac 100644 (file)
--- a/libbb/process_escape_sequence.c
+++ b/libbb/process_escape_sequence.c
@@ -18,17 +18,20 @@
 
 char FAST_FUNC bb_process_escape_sequence(const char **ptr)
 {
+       /* bash builtin "echo -e '\ec'" interprets \e as ESC,
+        * but coreutils "/bin/echo -e '\ec'" does not.
+        * manpages tend to support coreutils way. */
        static const char charmap[] ALIGN1 = {
-               'a',  'b',  'f',  'n',  'r',  't',  'v',  '\\', 0,
-               '\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
+               'a',  'b', /*'e',*/ 'f',  'n',  'r',  't',  'v',  '\\', 0,
+               '\a', '\b', /*27,*/ '\f', '\n', '\r', '\t', '\v', '\\', '\\' };
 
        const char *p;
        const char *q;
-       unsigned int num_digits;
-       unsigned int r;
-       unsigned int n;
-       unsigned int d;
-       unsigned int base;
+       unsigned num_digits;
+       unsigned r;
+       unsigned n;
+       unsigned d;
+       unsigned base;
 
        num_digits = n = 0;
        base = 8;