From 8e95068c7f28fe2a1e31b01636e3ed29eed09ef8 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Tue, 31 May 2016 02:42:49 +0200 Subject: Make busybox an optional applet If it's disabled, code shrinks by about 900 bytes: function old new delta usr_bin 10 - -10 usr_sbin 11 - -11 install_dir 20 - -20 applet_install_loc 184 - -184 run_applet_and_exit 686 21 -665 ------------------------------------------------------------------------------ (add/remove: 0/4 grow/shrink: 0/1 up/down: 0/-890) Total: -890 bytes text data bss dec hex filename 911327 493 7336 919156 e0674 busybox_old 909848 493 7336 917677 e00ad busybox_unstripped but busybox executable by itself does not say anything useful: $ busybox busybox: applet not found Based on the patch by Ron Yorston Signed-off-by: Denys Vlasenko --- libbb/appletlib.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) (limited to 'libbb') diff --git a/libbb/appletlib.c b/libbb/appletlib.c index b682e6b85..281123c37 100644 --- a/libbb/appletlib.c +++ b/libbb/appletlib.c @@ -701,7 +701,7 @@ static void install_links(const char *busybox, int use_symbolic_links, continue; } } -# else +# elif ENABLE_BUSYBOX static void install_links(const char *busybox UNUSED_PARAM, int use_symbolic_links UNUSED_PARAM, char *custom_install_dir UNUSED_PARAM) @@ -709,6 +709,7 @@ static void install_links(const char *busybox UNUSED_PARAM, } # endif +# if ENABLE_BUSYBOX /* If we were called as "busybox..." */ static int busybox_main(char **argv) { @@ -784,10 +785,10 @@ static int busybox_main(char **argv) const char *a = applet_names; dup2(1, 2); while (*a) { -# if ENABLE_FEATURE_INSTALLER +# if ENABLE_FEATURE_INSTALLER if (argv[1][6]) /* --list-full? */ full_write2_str(install_dir[APPLET_INSTALL_LOC(i)] + 1); -# endif +# endif full_write2_str(a); full_write2_str("\n"); i++; @@ -843,6 +844,7 @@ static int busybox_main(char **argv) /* POSIX: "If a command is not found, the exit status shall be 127" */ exit(127); } +# endif void FAST_FUNC run_applet_no_and_exit(int applet_no, char **argv) { @@ -886,8 +888,10 @@ void FAST_FUNC run_applet_and_exit(const char *name, char **argv) { int applet; +# if ENABLE_BUSYBOX if (is_prefixed_with(name, "busybox")) exit(busybox_main(argv)); +# endif /* find_applet_by_name() search is more expensive, so goes second */ applet = find_applet_by_name(name); if (applet >= 0) -- cgit v1.2.3