last_patch89 from vodz:

    Manuel,

    I rewrite bb_getopt_ulflags() function for more universal usage.
    My version support now:
    - options with arguments (optional arg as GNU extension also)
    - complementaly and/or incomplementaly and/or incongruously and/or list
    options
    - long_opt (all applets may have long option, add supporting is trivial)
    This realisation full compatibile from your version.
    Code size grow 480 bytes, but only coreutils/* over compensate this size
    after using new function. Last patch reduced over 800 bytes and not full
    applied to all. "mkdir" and "mv" applets have long_opt now for demonstrate
    trivial addition support long_opt with usage new bb_getopt_ulflags().
    Complementaly and/or incomplementaly and/or incongruously and/or list options
    logic is not trivial, but new "cut" and "grep" applets using this logic
    for examples with full demostrating. New "grep" applet reduced over 300
    bytes.

    Mark,
    Also. I removed bug from "grep" applet.
    $ echo a b | busybox grep -e a b
    a b
    a b
    But right is printing one only.

    --w
    vodz

1 files changed, 8 insertions, 14 deletions

diff --git a/coreutils/rm.c b/coreutils/rm.c
index 5489350..39609e7 100644
--- a/coreutils/rm.c
+++ b/coreutils/rm.c
@@ -36,22 +36,16 @@ extern int rm_main(int argc, char **argv)
 {
 	int status = 0;
 	int flags = 0;
-	int opt;
+	unsigned long opt;
 
-	while ((opt = getopt(argc, argv, "fiRr")) > 0) {
-		if ((opt == 'r') || (opt == 'R')) {
-			flags |= FILEUTILS_RECUR;
-		} else {
-			flags &= ~(FILEUTILS_INTERACTIVE | FILEUTILS_FORCE);
-			if (opt == 'i') {
-				flags |= FILEUTILS_INTERACTIVE;
-			} else if (opt == 'f') {
+	bb_opt_complementaly = "f-i:i-f";
+	opt = bb_getopt_ulflags(argc, argv, "fiRr");
+	if(opt & 1)
 				flags |= FILEUTILS_FORCE;
-			} else {
-				bb_show_usage();
-			}
-		}
-	}
+	if(opt & 2)
+		flags |= FILEUTILS_INTERACTIVE;
+	if(opt & 12)
+		flags |= FILEUTILS_RECUR;
 
 	if (*(argv += optind) != NULL) {
 		do {