Author: cem
Date: Fri Dec 29 22:08:43 2017
New Revision: 327362
URL: https://svnweb.freebsd.org/changeset/base/327362

Log:
  find(1): Fix -newer and -samefile to conform to POSIX[0]
  
  By default, or with the -P flag, find(1) should evaluate paths "physically."
  For symlinks, this means using the link itself instead of the target.
  
  Historically (since the import of BSD 4.4-lite from CSRG), find(1) has
  failed to refer to the link itself, at least for -newer and -samefile.
  
  [0]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.html
  
  PR:           222698
  Reported by:  Harald Schmalzbauer <bugzilla.freebsd AT omnilan.de>
  Sponsored by: Dell EMC Isilon

Added:
  head/usr.bin/find/tests/
  head/usr.bin/find/tests/Makefile   (contents, props changed)
  head/usr.bin/find/tests/find_test.sh   (contents, props changed)
Modified:
  head/usr.bin/find/Makefile
  head/usr.bin/find/function.c

Modified: head/usr.bin/find/Makefile
==============================================================================
--- head/usr.bin/find/Makefile  Fri Dec 29 21:37:36 2017        (r327361)
+++ head/usr.bin/find/Makefile  Fri Dec 29 22:08:43 2017        (r327362)
@@ -8,4 +8,7 @@ YFLAGS=
 
 NO_WMISSING_VARIABLE_DECLARATIONS=
 
+#HAS_TESTS=
+#SUBDIR.${MK_TESTS}+= tests
+
 .include <bsd.prog.mk>

Modified: head/usr.bin/find/function.c
==============================================================================
--- head/usr.bin/find/function.c        Fri Dec 29 21:37:36 2017        
(r327361)
+++ head/usr.bin/find/function.c        Fri Dec 29 22:08:43 2017        
(r327362)
@@ -1066,12 +1066,17 @@ c_samefile(OPTION *option, char ***argvp)
        char *fn;
        PLAN *new;
        struct stat sb;
+       int error;
 
        fn = nextarg(option, argvp);
        ftsoptions &= ~FTS_NOSTAT;
 
        new = palloc(option);
-       if (stat(fn, &sb))
+       if (ftsoptions & FTS_PHYSICAL)
+               error = lstat(fn, &sb);
+       else
+               error = stat(fn, &sb);
+       if (error != 0)
                err(1, "%s", fn);
        new->i_data = sb.st_ino;
        return new;
@@ -1201,6 +1206,7 @@ c_newer(OPTION *option, char ***argvp)
        char *fn_or_tspec;
        PLAN *new;
        struct stat sb;
+       int error;
 
        fn_or_tspec = nextarg(option, argvp);
        ftsoptions &= ~FTS_NOSTAT;
@@ -1214,7 +1220,11 @@ c_newer(OPTION *option, char ***argvp)
                /* Use the seconds only in the comparison. */
                new->t_data.tv_nsec = 999999999;
        } else {
-               if (stat(fn_or_tspec, &sb))
+               if (ftsoptions & FTS_PHYSICAL)
+                       error = lstat(fn_or_tspec, &sb);
+               else
+                       error = stat(fn_or_tspec, &sb);
+               if (error != 0)
                        err(1, "%s", fn_or_tspec);
                if (option->flags & F_TIME2_C)
                        new->t_data = sb.st_ctim;

Added: head/usr.bin/find/tests/Makefile
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/usr.bin/find/tests/Makefile    Fri Dec 29 22:08:43 2017        
(r327362)
@@ -0,0 +1,5 @@
+# $FreeBSD$
+
+ATF_TESTS_SH=  find_test
+
+.include <bsd.test.mk>

Added: head/usr.bin/find/tests/find_test.sh
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/usr.bin/find/tests/find_test.sh        Fri Dec 29 22:08:43 2017        
(r327362)
@@ -0,0 +1,73 @@
+#
+# Copyright 2017, Conrad Meyer <c...@freebsd.org>.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# * 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+# OWNER 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 find_newer_link
+find_newer_link_head()
+{
+       atf_set "descr" "Verifies that -newer correctly uses a symlink, " \
+           "rather than its target, for comparison"
+}
+find_newer_link_body()
+{
+       atf_check -s exit:0 mkdir test
+       atf_check -s exit:0 ln -s file1 test/link
+       atf_check -s exit:0 sleep 1.1
+       atf_check -s exit:0 touch test/file2
+       atf_check -s exit:0 sleep 1.1
+       atf_check -s exit:0 touch test/file1
+
+       # find(1) should evaluate 'link' as a symlink rather than its target
+       # (with -P / without -L flags).  Since link was created first, the
+       # other two files should be newer.
+       echo -e "test\ntest/file1\ntest/file2" > expout
+       atf_check -s exit:0 -o save:output find test -newer test/link
+       atf_check -s exit:0 -o file:expout sort < output
+}
+
+atf_test_case find_samefile_link
+find_samefile_link_head()
+{
+       atf_set "descr" "Verifies that -samefile correctly uses a symlink, " \
+           "rather than its target, for comparison"
+}
+find_samefile_link_body()
+{
+       atf_check -s exit:0 mkdir test
+       atf_check -s exit:0 touch test/file3
+       atf_check -s exit:0 ln -s file3 test/link2
+
+       # find(1) should evaluate 'link' as a symlink rather than its target
+       # (with -P / without -L flags).
+       atf_check -s exit:0 -o "inline:test/link2\n" find test -samefile 
test/link2
+}
+
+atf_init_test_cases()
+{
+       atf_add_test_case find_newer_link
+       atf_add_test_case find_samefile_link
+}
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