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

 (no code changes)

1 files changed, 10 insertions, 7 deletions

diff --git a/libbb/process_escape_sequence.c b/libbb/process_escape_sequence.c
index 4d03bd61f..6de2cacdd 100644
--- 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;