1#include "swap.h"
 2#include "common/debug.h"
 3#include "common/FFlist.h"
 4#include "common/mallocHelper.h"
 5
 6#include <errno.h>
 7#include <string.h>
 8#include <sys/types.h>
 9#include <sys/swap.h>
10#include <sys/param.h>
11#include <unistd.h>
12
13const char* ffDetectSwap(FFlist* result) {
14    int nswap = swapctl(SWAP_NSWAP, 0, 0);
15    if (nswap < 0) {
16        FF_DEBUG("swapctl(SWAP_NSWAP) failed: %s", strerror(errno));
17        return "swapctl(SWAP_NSWAP) failed";
18    }
19    if (nswap == 0) {
20        return nullptr;
21    }
22
23    FF_AUTO_FREE struct swapent* swdev = malloc((uint32_t) nswap * sizeof(*swdev));
24
25    if (swapctl(SWAP_STATS, swdev, nswap) < 0) {
26        FF_DEBUG("swapctl(SWAP_STATS) failed: %s", strerror(errno));
27        return "swapctl(SWAP_STATS) failed";
28    }
29
30    for (int i = 0; i < nswap; i++) {
31        if (swdev[i].se_flags & SWF_ENABLE) {
32            FFSwapResult* swap = FF_LIST_ADD(FFSwapResult, *result);
33            ffStrbufInitS(&swap->name, swdev[i].se_path);
34            swap->bytesUsed = (uint64_t) swdev[i].se_inuse * DEV_BSIZE;
35            swap->bytesTotal = (uint64_t) swdev[i].se_nblks * DEV_BSIZE;
36        }
37    }
38
39    return nullptr;
40}