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swapon: optional -p PRIO support (by Francois Barel <frabar666 AT gmail.com>)

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function                                             old     new   delta
swap_on_off_main                                     153     216     +63
packed_usage                                       24190   24214     +24
swap_enable_disable                                  127     131      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 91/0)               Total: 91 bytes
This commit is contained in:
Denis Vlasenko
2008-05-18 23:05:34 +00:00
parent 5599502a55
commit ee56e013cf
3 changed files with 42 additions and 7 deletions
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37
util-linux/swaponoff.c
View File

@@ -11,6 +11,16 @@
#include <mntent.h>
#include <sys/swap.h>
#if ENABLE_FEATURE_SWAPON_PRI
struct globals {
int flags;
};
#define G (*(struct globals*)&bb_common_bufsiz1)
#define g_flags (G.flags)
#else
#define g_flags 0
#endif
static int swap_enable_disable(char *device)
{
int status;
@@ -26,7 +36,7 @@ static int swap_enable_disable(char *device)
#endif
if (applet_name[5] == 'n')
status = swapon(device, 0);
status = swapon(device, g_flags);
else
status = swapoff(device);
@@ -63,15 +73,30 @@ int swap_on_off_main(int argc ATTRIBUTE_UNUSED, char **argv)
{
int ret;
if (!argv[1])
bb_show_usage();
#if !ENABLE_FEATURE_SWAPON_PRI
ret = getopt32(argv, "a");
if (ret)
#else
opt_complementary = "p+";
ret = getopt32(argv, (applet_name[5] == 'n') ? "ap:" : "a", &g_flags);
if (ret & 2) { // -p
g_flags = SWAP_FLAG_PREFER |
((g_flags & SWAP_FLAG_PRIO_MASK) << SWAP_FLAG_PRIO_SHIFT);
ret &= 1;
}
#endif
if (ret /* & 1: not needed */) // -a
return do_em_all();
argv += optind;
if (!*argv)
bb_show_usage();
/* ret = 0; redundant */
while (*++argv)
do {
ret += swap_enable_disable(*argv);
} while (*++argv);
return ret;
}