main/busybox: add support for --no-dereference in 'diff'

ref #2847

1 files changed, 63 insertions, 0 deletions

diff --git a/main/busybox/0001-diff-add-support-for-no-dereference.patch b/main/busybox/0001-diff-add-support-for-no-dereference.patch
new file mode 100644
index 000000000..6a9146337
--- /dev/null
+++ b/main/busybox/0001-diff-add-support-for-no-dereference.patch
@@ -0,0 +1,63 @@
+From 3993add1f639fc1c6c44d9dc865aa02646e22d6c Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Fri, 25 Jul 2014 15:28:33 +0200
+Subject: [PATCH] diff: add support for --no-dereference
+
+Add flag for not following symlinks when recursing
+
+function                                             old     new   delta
+.rodata                                             7934    7967     +33
+diff_longopts                                        253     270     +17
+packed_usage                                        1704    1720     +16
+diff_main                                           1665    1662      -3
+------------------------------------------------------------------------------
+(add/remove: 0/0 grow/shrink: 3/1 up/down: 66/-3)              Total: 63 bytes
+
+Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
+---
+ editors/diff.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/editors/diff.c b/editors/diff.c
+index a78a0ee..a0203af 100644
+--- a/editors/diff.c
++++ b/editors/diff.c
+@@ -117,6 +117,9 @@
+ //usage:     "\n	-N	Treat absent files as empty"
+ //usage:     "\n	-q	Output only whether files differ"
+ //usage:     "\n	-r	Recurse"
++//usage:        IF_LONG_OPTS(
++//usage:     "\n        --no-dereference Don't follow symlinks"
++//usage:        )
+ //usage:     "\n	-S	Start with FILE when comparing directories"
+ //usage:     "\n	-T	Make tabs line up by prefixing a tab when necessary"
+ //usage:     "\n	-s	Report when two files are the same"
+@@ -157,6 +160,7 @@ enum {                  /* Commandline flags */
+ 	FLAG_p,         /* not implemented */
+ 	FLAG_B,
+ 	FLAG_E,         /* not implemented */
++	FLAG_no_deref,
+ };
+ #define FLAG(x) (1 << FLAG_##x)
+ 
+@@ -869,7 +873,8 @@ static void diffdir(char *p[2], const char *s_start)
+ 		 * Using list.len to specify its length,
+ 		 * add_to_dirlist will remove it. */
+ 		list[i].len = strlen(p[i]);
+-		recursive_action(p[i], ACTION_RECURSE | ACTION_FOLLOWLINKS,
++		recursive_action(p[i], ACTION_RECURSE |
++			(option_mask32 & FLAG(no_deref)) ? 0 : ACTION_FOLLOWLINKS,
+ 				add_to_dirlist, skip_dir, &list[i], 0);
+ 		/* Sort dl alphabetically.
+ 		 * GNU diff does this ignoring any number of trailing dots.
+@@ -966,6 +971,7 @@ static const char diff_longopts[] ALIGN1 =
+ 	"report-identical-files\0"   No_argument       "s"
+ 	"starting-file\0"            Required_argument "S"
+ 	"minimal\0"                  No_argument       "d"
++	"no-dereference\0"           No_argument       "\xff"
+ 	;
+ #endif
+ 
+-- 
+2.0.3
+