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modprobe-small: move lsmod code out of modprobe_main()

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Having lsmod code inside modprobe_main() makes some of the applet name
checking code awkward. Besides, this make busybox x86_64 binary a few
bytes smaller. :)

function                                  old     new   delta
lsmod_main                                  -      23     +23
modprobe_main                             599     564     -35
-------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 23/-35) Total: -12 bytes

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Kang-Che Sung 2017-01-31 17:06:43 +08:00 committed by Denys Vlasenko
parent dc7637d0aa
commit fdfd716a85
1 changed files with 24 additions and 20 deletions
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44
modutils/modprobe-small.c
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@ -24,12 +24,12 @@
//config: help
//config: Check if the module is already loaded.
//applet:IF_LSMOD( IF_MODPROBE_SMALL(APPLET(lsmod, BB_DIR_SBIN, BB_SUID_DROP)))
//applet:IF_MODPROBE(IF_MODPROBE_SMALL(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP)))
// APPLET_ODDNAME:name main location suid_type help
//applet:IF_DEPMOD(IF_MODPROBE_SMALL(APPLET_ODDNAME(depmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, depmod)))
//applet:IF_INSMOD(IF_MODPROBE_SMALL(APPLET_ODDNAME(insmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, insmod)))
//applet:IF_LSMOD(IF_MODPROBE_SMALL( APPLET_ODDNAME(lsmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, lsmod)))
//applet:IF_RMMOD(IF_MODPROBE_SMALL( APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod)))
//applet:IF_RMMOD( IF_MODPROBE_SMALL(APPLET_ODDNAME(rmmod, modprobe, BB_DIR_SBIN, BB_SUID_DROP, rmmod)))
//kbuild:lib-$(CONFIG_MODPROBE_SMALL) += modprobe-small.o
@ -59,7 +59,27 @@
#define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb"
#define MOD_APPLET_CNT (ENABLE_MODPROBE + ENABLE_DEPMOD + ENABLE_INSMOD + ENABLE_LSMOD + ENABLE_RMMOD)
//usage:#if ENABLE_MODPROBE_SMALL
//usage:#define lsmod_trivial_usage
//usage: ""
//usage:#define lsmod_full_usage "\n\n"
//usage: "List loaded kernel modules"
//usage:#endif
#if ENABLE_LSMOD
int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int lsmod_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
xprint_and_close_file(xfopen_for_read("/proc/modules"));
return EXIT_SUCCESS;
}
#endif
/* Num of applets that use modprobe_main() entry point. */
/* lsmod is not here. */
#define MOD_APPLET_CNT (ENABLE_MODPROBE + ENABLE_DEPMOD + ENABLE_INSMOD + ENABLE_RMMOD)
/* Do not bother if MODPROBE_SMALL=y but no applets selected. */
/* The rest of the file is in this if block. */
@ -69,7 +89,6 @@
#define is_modprobe (ENABLE_MODPROBE && (ONLY_APPLET || applet_name[0] == 'm'))
#define is_depmod (ENABLE_DEPMOD && (ONLY_APPLET || applet_name[0] == 'd'))
#define is_insmod (ENABLE_INSMOD && (ONLY_APPLET || applet_name[0] == 'i'))
#define is_lsmod (ENABLE_LSMOD && (ONLY_APPLET || applet_name[0] == 'l'))
#define is_rmmod (ENABLE_RMMOD && (ONLY_APPLET || applet_name[0] == 'r'))
enum {
@ -890,11 +909,6 @@ The following options are useful for people managing distributions:
//usage:#define depmod_trivial_usage NOUSAGE_STR
//usage:#define depmod_full_usage ""
//usage:#define lsmod_trivial_usage
//usage: ""
//usage:#define lsmod_full_usage "\n\n"
//usage: "List loaded kernel modules"
//usage:#define insmod_trivial_usage
//usage: "FILE" IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(" [SYMBOL=VALUE]...")
//usage:#define insmod_full_usage "\n\n"
@ -922,12 +936,6 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
struct utsname uts;
IF_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE(char *options = NULL;)
/* are we lsmod? -> just dump /proc/modules */
if (is_lsmod) {
xprint_and_close_file(xfopen_for_read("/proc/modules"));
return EXIT_SUCCESS;
}
INIT_G();
/* Prevent ugly corner cases with no modules at all */
@ -940,11 +948,7 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
uname(&uts); /* never fails */
/* depmod? */
if ((MOD_APPLET_CNT == 2 && ENABLE_DEPMOD && ENABLE_LSMOD)
/* ^^^"only depmod and lsmod is configured"^^^^^^^^^^^^^^ */
/* note: we already know here it is not lsmod (handled before) */
|| is_depmod
) {
if (is_depmod) {
/* Supported:
* -n: print result to stdout
* -a: process all modules (default)