libbb/process_escape_sequence.c: fix recently broken handling of \\

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

diff --git a/libbb/process_escape_sequence.c b/libbb/process_escape_sequence.c
index 7b1d97f..346ecfa 100644 (file)
--- a/libbb/process_escape_sequence.c
+++ b/libbb/process_escape_sequence.c
@@ -75,8 +75,8 @@ char FAST_FUNC bb_process_escape_sequence(const char **ptr)
                 * Manpages tend to support coreutils way.
                 * Update: coreutils added support for \e on 28 Oct 2009. */
                static const char charmap[] ALIGN1 = {
-                       'a',  'b', 'e', 'f',  'n',  'r',  't',  'v',  '\\',
-                       '\a', '\b', 27, '\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 = charmap;
                do {
@@ -84,8 +84,8 @@ char FAST_FUNC bb_process_escape_sequence(const char **ptr)
                                q++;
                                break;
                        }
-               } while (*++p != '\\');
-               /* p points to found escape char or '\',
+               } while (*++p != '\0');
+               /* p points to found escape char or NUL,
                 * advance it and find what it translates to.
                 * Note that \NUL and unrecognized sequence \z return '\'
                 * and leave ptr pointing to NUL or z. */