diff options
| author | Denys Vlasenko | 2016-05-31 02:42:49 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2016-05-31 02:44:34 +0200 |
| commit | 8e95068c7f28fe2a1e31b01636e3ed29eed09ef8 (patch) | |
| tree | 366721e86423370093b64989a215bee4ab1790ff | |
| parent | 877dedb8251be47b3614a371434081ae9b7b358b (diff) | |
| download | busybox-8e95068c7f28fe2a1e31b01636e3ed29eed09ef8.zip busybox-8e95068c7f28fe2a1e31b01636e3ed29eed09ef8.tar.gz | |
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 <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | Config.in | 12 | ||||
| -rw-r--r-- | libbb/appletlib.c | 10 |
2 files changed, 19 insertions, 3 deletions
@@ -116,9 +116,21 @@ config FEATURE_COMPRESS_USAGE and have very little memory, this might not be a win. Otherwise, you probably want this. +config BUSYBOX + bool "Include busybox applet" + default y + help + The busybox applet provides general help regarding busybox and + allows the included applets to be listed. It's also required + if applet links are to be installed at runtime. + + If you can live without these features disabling this will save + some space. + config FEATURE_INSTALLER bool "Support --install [-s] to install applet links at runtime" default y + depends on BUSYBOX help Enable 'busybox --install [-s]' support. This will allow you to use busybox at runtime to create hard links or symlinks for all the diff --git a/libbb/appletlib.c b/libbb/appletlib.c index b682e6b..281123c 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) |