Add in grep -E support

git-svn-id: svn://busybox.net/trunk/busybox@3653 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 8 insertions, 0 deletions

diff --git a/findutils/grep.c b/findutils/grep.c
index 7afa817da..faecb58bc 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -253,6 +253,9 @@ extern int grep_main(int argc, char **argv)
 #ifdef CONFIG_FEATURE_GREP_CONTEXT
 "A:B:C:"
 #endif
+#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
+"E"
+#endif
 )) > 0) {
                 switch (opt) {
                         case 'i':
@@ -285,6 +288,11 @@ extern int grep_main(int argc, char **argv)
                         case 'e':
                                 add_regex(optarg);
                                 break;
+#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
+                        case 'E':
+                                reflags |= REG_EXTENDED;
+                                break;
+#endif
                         case 'f':
                                 load_regexes_from_file(optarg);
                                 break;