Author: kevans
Date: Sat Jan 20 02:49:32 2018
New Revision: 328188
URL: https://svnweb.freebsd.org/changeset/base/328188

Log:
  od(1): Fix wrong output for some corner cases in multibyte locales.
  
  Restore the original character to print if we used the look-ahead
  buffer, but that didn't help -- we either got an illegal sequence
  or still can't complete.
  
  PR:           224552
  Submitted by: Yuri Pankov
  MFC after:    1 week
  Differential Revision:        https://reviews.freebsd.org/D13963

Added:
  head/usr.bin/hexdump/tests/d_od_cflag_a.out   (contents, props changed)
  head/usr.bin/hexdump/tests/d_od_cflag_b.out   (contents, props changed)
  head/usr.bin/hexdump/tests/od_test.sh   (contents, props changed)
Modified:
  head/usr.bin/hexdump/conv.c
  head/usr.bin/hexdump/tests/Makefile

Modified: head/usr.bin/hexdump/conv.c
==============================================================================
--- head/usr.bin/hexdump/conv.c Sat Jan 20 01:55:34 2018        (r328187)
+++ head/usr.bin/hexdump/conv.c Sat Jan 20 02:49:32 2018        (r328188)
@@ -56,6 +56,7 @@ conv_c(PR *pr, u_char *p, size_t bufsize)
        size_t clen, oclen;
        int converr, pad, width;
        u_char peekbuf[MB_LEN_MAX];
+       u_char *op;
 
        if (pr->mbleft > 0) {
                str = "**";
@@ -107,6 +108,15 @@ retry:
                else if (clen == (size_t)-1 || (clen == (size_t)-2 &&
                    p == peekbuf)) {
                        memset(&pr->mbstate, 0, sizeof(pr->mbstate));
+                       if (p == peekbuf) {
+                               /*
+                                * We peeked ahead, but that didn't help --
+                                * we either got an illegal sequence or still
+                                * can't complete; restore original character.
+                                */
+                               oclen = 0;
+                               p = op;
+                       }
                        wc = *p;
                        clen = 1;
                        converr = 1;
@@ -116,6 +126,7 @@ retry:
                         * can complete it.
                         */
                        oclen = bufsize;
+                       op = p;
                        bufsize = peek(p = peekbuf, MB_CUR_MAX);
                        goto retry;
                }
@@ -128,7 +139,7 @@ retry:
                if (!odmode) {
                        *pr->cchar = 'c';
                        (void)printf(pr->fmt, (int)wc);
-               } else {        
+               } else {
                        *pr->cchar = 'C';
                        assert(strcmp(pr->fmt, "%3C") == 0);
                        width = wcwidth(wc);

Modified: head/usr.bin/hexdump/tests/Makefile
==============================================================================
--- head/usr.bin/hexdump/tests/Makefile Sat Jan 20 01:55:34 2018        
(r328187)
+++ head/usr.bin/hexdump/tests/Makefile Sat Jan 20 02:49:32 2018        
(r328188)
@@ -2,7 +2,7 @@
 
 PACKAGE=       tests
 
-ATF_TESTS_SH=  hexdump_test
+ATF_TESTS_SH=  hexdump_test od_test
 
 ${PACKAGE}FILES+=      d_hexdump_a.in
 ${PACKAGE}FILES+=      d_hexdump_b.in
@@ -27,5 +27,7 @@ ${PACKAGE}FILES+=     d_hexdump_UCflag_c.out
 ${PACKAGE}FILES+=      d_hexdump_xflag_a.out
 ${PACKAGE}FILES+=      d_hexdump_xflag_b.out
 ${PACKAGE}FILES+=      d_hexdump_xflag_c.out
+${PACKAGE}FILES+=      d_od_cflag_a.out
+${PACKAGE}FILES+=      d_od_cflag_b.out
 
 .include <bsd.test.mk>

Added: head/usr.bin/hexdump/tests/d_od_cflag_a.out
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/usr.bin/hexdump/tests/d_od_cflag_a.out Sat Jan 20 02:49:32 2018        
(r328188)
@@ -0,0 +1,3 @@
+0000000    T   e   s   t   T   e   s   t   T   e   s   t   T   e   s 345
+0000020    T   e   s   t 345                                            
+0000025

Added: head/usr.bin/hexdump/tests/d_od_cflag_b.out
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/usr.bin/hexdump/tests/d_od_cflag_b.out Sat Jan 20 02:49:32 2018        
(r328188)
@@ -0,0 +1,3 @@
+0000000    T   e   s   t   T   e   s   t   T   e   s   t   T   e   s   т
+0000020   **   Т  **   е  **   с  **   т  **                            
+0000031

Added: head/usr.bin/hexdump/tests/od_test.sh
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/usr.bin/hexdump/tests/od_test.sh       Sat Jan 20 02:49:32 2018        
(r328188)
@@ -0,0 +1,94 @@
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright 2018 (C) Yuri Pankov
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+
+atf_test_case c_flag
+c_flag_head()
+{
+       atf_set "descr" "Verify -c output (PR 224552)"
+}
+c_flag_body()
+{
+       export LC_ALL="en_US.UTF-8"
+
+       printf 'TestTestTestTes\345Test\345' > d_od_cflag.in
+       atf_check -o file:"$(atf_get_srcdir)/d_od_cflag_a.out" \
+           od -c d_od_cflag.in
+       printf 'TestTestTestTesтТест' > d_od_cflag.in
+       atf_check -o file:"$(atf_get_srcdir)/d_od_cflag_b.out" \
+           od -c d_od_cflag.in
+}
+
+atf_init_test_cases()
+{
+       atf_add_test_case c_flag
+}
+#
+# Copyright 2018 The FreeBSD Project
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+
+atf_test_case c_flag
+c_flag_head()
+{
+       atf_set "descr" "Verify -c output"
+}
+c_flag_body()
+{
+       printf 'TestTestTestTes\345Test\345' > d_od_cflag.in
+       atf_check -o file:"$(atf_get_srcdir)/d_od_cflag_a.out" \
+           env LC_CTYPE="en_US.UTF-8" od -c "d_od_cflag.in"
+       printf 'TestTestTestTesтТест' > d_od_cflag.in
+       atf_check -o file:"$(atf_get_srcdir)/d_od_cflag_b.out" \
+           env LC_CTYPE="en_US.UTF-8" od -c "d_od_cflag.in"
+}
+
+atf_init_test_cases()
+{
+       atf_add_test_case c_flag
+}
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