From f417ffd88f194bbfd18605882ee242190c1bab34 Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Mon, 14 Nov 2016 17:30:50 +0100 Subject: Make swapon and swapoff individually selectable. For example, without swapoff, code shrinks by 277 bytes. Signed-off-by: Denys Vlasenko --- util-linux/swaponoff.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) (limited to 'util-linux/swaponoff.c') diff --git a/util-linux/swaponoff.c b/util-linux/swaponoff.c index 6713852e5..0a2d23f50 100644 --- a/util-linux/swaponoff.c +++ b/util-linux/swaponoff.c @@ -7,6 +7,47 @@ * Licensed under GPLv2, see file LICENSE in this source tree. */ +//config:config SWAPON +//config: bool "swapon" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: This option enables the 'swapon' utility. +//config: Once you have created some swap space using 'mkswap', you also need +//config: to enable your swap space with the 'swapon' utility. The 'swapoff' +//config: utility is used, typically at system shutdown, to disable any swap +//config: space. If you are not using any swap space, you can leave this +//config: option disabled. +//config: +//config:config FEATURE_SWAPON_DISCARD +//config: bool "Support discard option -d" +//config: default y +//config: depends on SWAPON +//config: help +//config: Enable support for discarding swap area blocks at swapon and/or as +//config: the kernel frees them. This option enables both the -d option on +//config: 'swapon' and the 'discard' option for swap entries in /etc/fstab. +//config: +//config:config FEATURE_SWAPON_PRI +//config: bool "Support priority option -p" +//config: default y +//config: depends on SWAPON +//config: help +//config: Enable support for setting swap device priority in swapon. +//config: +//config:config SWAPOFF +//config: bool "swapoff" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: This option enables the 'swapoff' utility. + +//applet:IF_SWAPON(APPLET_ODDNAME(swapon, swap_on_off, BB_DIR_SBIN, BB_SUID_DROP, swapon)) +//applet:IF_SWAPOFF(APPLET_ODDNAME(swapoff, swap_on_off, BB_DIR_SBIN, BB_SUID_DROP, swapoff)) + +//kbuild:lib-$(CONFIG_SWAPON) += swaponoff.o +//kbuild:lib-$(CONFIG_SWAPOFF) += swaponoff.o + //usage:#define swapon_trivial_usage //usage: "[-a] [-e]" IF_FEATURE_SWAPON_DISCARD(" [-d[POL]]") IF_FEATURE_SWAPON_PRI(" [-p PRI]") " [DEVICE]" //usage:#define swapon_full_usage "\n\n" @@ -74,7 +115,15 @@ struct globals { #endif #define INIT_G() do { setup_common_bufsiz(); } while (0) -#define do_swapoff (applet_name[5] == 'f') +#if ENABLE_SWAPOFF +# if ENABLE_SWAPON +# define do_swapoff (applet_name[5] == 'f') +# else +# define do_swapoff 1 +# endif +#else +# define do_swapoff 0 +#endif /* Command line options */ enum { -- cgit v1.2.3