Rick Richardson writes:

Here is a patch that adds egrep -L support (the opposite of egrep -l).

I realize this is probably too late for 1.0.  But I offer it for your
future consideration.

egrep -L is used in some networking startup scripts I inherited.

-Rick


git-svn-id: svn://busybox.net/trunk/busybox@8874 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 16 insertions, 8 deletions

diff --git a/findutils/grep.c b/findutils/grep.c
index 6ece0ab12..4e7e15920 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -34,7 +34,7 @@
 
 
 /* options */
-#define GREP_OPTS "lnqvscFiHhe:f:"
+#define GREP_OPTS "lnqvscFiHhe:f:L"
 #define GREP_OPT_l 1
 static char print_files_with_matches;
 #define GREP_OPT_n 2
@@ -55,15 +55,17 @@ static char fgrep_flag;
 #define GREP_OPT_h 512
 #define GREP_OPT_e 1024
 #define GREP_OPT_f 2048
+#define GREP_OPT_L 4096
+static char print_files_without_matches;
 #ifdef CONFIG_FEATURE_GREP_CONTEXT
 #define GREP_OPT_CONTEXT "A:B:C"
-#define GREP_OPT_A 4096
-#define GREP_OPT_B 8192
-#define GREP_OPT_C 16384
-#define GREP_OPT_E 32768U
+#define GREP_OPT_A 8192
+#define GREP_OPT_B 16384
+#define GREP_OPT_C 32768
+#define GREP_OPT_E 65536
 #else
 #define GREP_OPT_CONTEXT ""
-#define GREP_OPT_E 4096
+#define GREP_OPT_E 8192
 #endif
 #ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
 # define OPT_EGREP "E"
@@ -147,7 +149,7 @@ static int grep_file(FILE *file)
                                 free(line);
 
                         /* if we found a match but were told to be quiet, stop here */
-                                if (be_quiet)
+                                if (be_quiet || print_files_without_matches)
                                 return -1;
 
                                 /* keep track of matches */
@@ -227,6 +229,11 @@ static int grep_file(FILE *file)
                 puts(cur_file);
         }
 
+        /* grep -L: print just the filename, but only if we didn't grep the line in the file  */
+        if (print_files_without_matches && nmatches == 0) {
+                puts(cur_file);
+        }
+
         return nmatches;
 }
 
@@ -290,7 +297,7 @@ extern int grep_main(int argc, char **argv)
                                         bb_error_msg_and_die("invalid context length argument");
                 }
         /* sanity checks after parse may be invalid numbers ;-) */
-        if ((opt & (GREP_OPT_c|GREP_OPT_q|GREP_OPT_l))) {
+        if ((opt & (GREP_OPT_c|GREP_OPT_q|GREP_OPT_l|GREP_OPT_L))) {
                 opt &= ~GREP_OPT_n;
                 lines_before = 0;
                 lines_after = 0;
@@ -305,6 +312,7 @@ extern int grep_main(int argc, char **argv)
 
 #endif
         print_files_with_matches = opt & GREP_OPT_l;
+        print_files_without_matches = (opt & GREP_OPT_L) != 0;
         print_line_num = opt & GREP_OPT_n;
         be_quiet = opt & GREP_OPT_q;
         invert_search = (opt & GREP_OPT_v) != 0;        /* 0 | 1 */