bpfc: Don't duplicate copyright/bug report/license string

Move the copyright/bug report/license string to an own constant and use
it for the output of help() and version() to avoid duplication and
prevent the strings from getting out of sync.  This makes the text
section of bpfc.o slightly smaller:

before:
   text	   data	    bss	    dec	    hex	filename
   3594	      0	      0	   3594	    e0a	bpfc/bpfc.o

after:
   text	   data	    bss	    dec	    hex	filename
   3313	      0	      0	   3313	    cf1	bpfc/bpfc.o

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 11 insertions, 14 deletions

diff --git a/bpfc.c b/bpfc.c
index a107bc8..f56ec0d 100644
--- a/bpfc.c
+++ b/bpfc.c
@@ -31,6 +31,13 @@ static const struct option long_options[] = {
 	{NULL, 0, NULL, 0}
 };
 
+static const char *copyright = "Please report bugs to <bugs@netsniff-ng.org>\n"
+	"Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
+	"Swiss federal institute of technology (ETH Zurich)\n"
+	"License: GNU GPL version 2.0\n"
+	"This is free software: you are free to change and redistribute it.\n"
+	"There is NO WARRANTY, to the extent permitted by law.\n";
+
 extern int compile_filter(char *file, int verbose, int bypass, int format,
 			  bool invoke_cpp);
 
@@ -56,13 +63,8 @@ static void __noreturn help(void)
 	     "  iptables -A INPUT -m bpf --bytecode \"`./bpfc -f xt_bpf -i fubar`\" -j LOG\n"
 	     "  bpfc -   (read from stdin)\n"
 	     "Note:\n"
-	     "  Generation of seccomp-BPF filters are fully supported as well.\n\n"
-	     "Please report bugs to <bugs@netsniff-ng.org>\n"
-	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
-	     "Swiss federal institute of technology (ETH Zurich)\n"
-	     "License: GNU GPL version 2.0\n"
-	     "This is free software: you are free to change and redistribute it.\n"
-	     "There is NO WARRANTY, to the extent permitted by law.\n");
+	     "  Generation of seccomp-BPF filters are fully supported as well.\n\n");
+	puts(copyright);
 	die();
 }
 
@@ -70,13 +72,8 @@ static void __noreturn version(void)
 {
 	printf("\nbpfc %s, Git id: %s\n", VERSION_LONG, GITVERSION);
 	puts("a tiny BPF compiler\n"
-	     "http://www.netsniff-ng.org\n\n"
-	     "Please report bugs to <bugs@netsniff-ng.org>\n"
-	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
-	     "Swiss federal institute of technology (ETH Zurich)\n"
-	     "License: GNU GPL version 2.0\n"
-	     "This is free software: you are free to change and redistribute it.\n"
-	     "There is NO WARRANTY, to the extent permitted by law.\n");
+	     "http://www.netsniff-ng.org\n\n");
+	puts(copyright);
 	die();
 }