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-rwxr-xr-xdesktop/slstatuso/components/swap.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/desktop/slstatuso/components/swap.c b/desktop/slstatuso/components/swap.c
new file mode 100755
index 0000000..f270d93
--- /dev/null
+++ b/desktop/slstatuso/components/swap.c
@@ -0,0 +1,274 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../slstatus.h"
+#include "../util.h"
+
+#if defined(__linux__)
+ static int
+ get_swap_info(long *s_total, long *s_free, long *s_cached)
+ {
+ FILE *fp;
+ struct {
+ const char *name;
+ const size_t len;
+ long *var;
+ } ent[] = {
+ { "SwapTotal", sizeof("SwapTotal") - 1, s_total },
+ { "SwapFree", sizeof("SwapFree") - 1, s_free },
+ { "SwapCached", sizeof("SwapCached") - 1, s_cached },
+ };
+ size_t line_len = 0, i, left;
+ char *line = NULL;
+
+ /* get number of fields we want to extract */
+ for (i = 0, left = 0; i < LEN(ent); i++)
+ if (ent[i].var)
+ left++;
+
+ if (!(fp = fopen("/proc/meminfo", "r"))) {
+ warn("fopen '/proc/meminfo':");
+ return 1;
+ }
+
+ /* read file line by line and extract field information */
+ while (left > 0 && getline(&line, &line_len, fp) >= 0) {
+ for (i = 0; i < LEN(ent); i++) {
+ if (ent[i].var &&
+ !strncmp(line, ent[i].name, ent[i].len)) {
+ sscanf(line + ent[i].len + 1,
+ "%ld kB\n", ent[i].var);
+ left--;
+ break;
+ }
+ }
+ }
+ free(line);
+ if (ferror(fp)) {
+ warn("getline '/proc/meminfo':");
+ return 1;
+ }
+
+ fclose(fp);
+ return 0;
+ }
+
+ const char *
+ swap_free(const char *unused)
+ {
+ long free;
+
+ if (get_swap_info(NULL, &free, NULL))
+ return NULL;
+
+ return fmt_human(free * 1024, 1024);
+ }
+
+ const char *
+ swap_perc(const char *unused)
+ {
+ long total, free, cached;
+
+ if (get_swap_info(&total, &free, &cached) || total == 0)
+ return NULL;
+
+ return bprintf("%d", 100 * (total - free - cached) / total);
+ }
+
+ const char *
+ swap_total(const char *unused)
+ {
+ long total;
+
+ if (get_swap_info(&total, NULL, NULL))
+ return NULL;
+
+ return fmt_human(total * 1024, 1024);
+ }
+
+ const char *
+ swap_used(const char *unused)
+ {
+ long total, free, cached;
+
+ if (get_swap_info(&total, &free, &cached))
+ return NULL;
+
+ return fmt_human((total - free - cached) * 1024, 1024);
+ }
+#elif defined(__OpenBSD__)
+ #include <stdlib.h>
+ #include <sys/swap.h>
+ #include <sys/types.h>
+ #include <unistd.h>
+
+ static int
+ getstats(int *total, int *used)
+ {
+ struct swapent *sep, *fsep;
+ int rnswap, nswap, i;
+
+ if ((nswap = swapctl(SWAP_NSWAP, 0, 0)) < 1) {
+ warn("swaptctl 'SWAP_NSWAP':");
+ return 1;
+ }
+ if (!(fsep = sep = calloc(nswap, sizeof(*sep)))) {
+ warn("calloc 'nswap':");
+ return 1;
+ }
+ if ((rnswap = swapctl(SWAP_STATS, (void *)sep, nswap)) < 0) {
+ warn("swapctl 'SWAP_STATA':");
+ return 1;
+ }
+ if (nswap != rnswap) {
+ warn("getstats: SWAP_STATS != SWAP_NSWAP");
+ return 1;
+ }
+
+ *total = 0;
+ *used = 0;
+
+ for (i = 0; i < rnswap; i++) {
+ *total += sep->se_nblks >> 1;
+ *used += sep->se_inuse >> 1;
+ }
+
+ free(fsep);
+
+ return 0;
+ }
+
+ const char *
+ swap_free(const char *unused)
+ {
+ int total, used;
+
+ if (getstats(&total, &used))
+ return NULL;
+
+ return fmt_human((total - used) * 1024, 1024);
+ }
+
+ const char *
+ swap_perc(const char *unused)
+ {
+ int total, used;
+
+ if (getstats(&total, &used))
+ return NULL;
+
+ if (total == 0)
+ return NULL;
+
+ return bprintf("%d", 100 * used / total);
+ }
+
+ const char *
+ swap_total(const char *unused)
+ {
+ int total, used;
+
+ if (getstats(&total, &used))
+ return NULL;
+
+ return fmt_human(total * 1024, 1024);
+ }
+
+ const char *
+ swap_used(const char *unused)
+ {
+ int total, used;
+
+ if (getstats(&total, &used))
+ return NULL;
+
+ return fmt_human(used * 1024, 1024);
+ }
+#elif defined(__FreeBSD__)
+ #include <fcntl.h>
+ #include <kvm.h>
+ #include <stdlib.h>
+ #include <sys/types.h>
+ #include <unistd.h>
+
+ static int getswapinfo(struct kvm_swap *swap_info, size_t size)
+ {
+ kvm_t *kd;
+
+ kd = kvm_openfiles(NULL, "/dev/null", NULL, 0, NULL);
+ if (kd == NULL) {
+ warn("kvm_openfiles '/dev/null':");
+ return 0;
+ }
+
+ if (kvm_getswapinfo(kd, swap_info, size, 0 /* Unused flags */) < 0) {
+ warn("kvm_getswapinfo:");
+ kvm_close(kd);
+ return 0;
+ }
+
+ kvm_close(kd);
+ return 1;
+ }
+
+ const char *
+ swap_free(const char *unused)
+ {
+ struct kvm_swap swap_info[1];
+ long used, total;
+
+ if (!getswapinfo(swap_info, 1))
+ return NULL;
+
+ total = swap_info[0].ksw_total;
+ used = swap_info[0].ksw_used;
+
+ return fmt_human((total - used) * getpagesize(), 1024);
+ }
+
+ const char *
+ swap_perc(const char *unused)
+ {
+ struct kvm_swap swap_info[1];
+ long used, total;
+
+ if (!getswapinfo(swap_info, 1))
+ return NULL;
+
+ total = swap_info[0].ksw_total;
+ used = swap_info[0].ksw_used;
+
+ return bprintf("%d", used * 100 / total);
+ }
+
+ const char *
+ swap_total(const char *unused)
+ {
+ struct kvm_swap swap_info[1];
+ long total;
+
+ if (!getswapinfo(swap_info, 1))
+ return NULL;
+
+ total = swap_info[0].ksw_total;
+
+ return fmt_human(total * getpagesize(), 1024);
+ }
+
+ const char *
+ swap_used(const char *unused)
+ {
+ struct kvm_swap swap_info[1];
+ long used;
+
+ if (!getswapinfo(swap_info, 1))
+ return NULL;
+
+ used = swap_info[0].ksw_used;
+
+ return fmt_human(used * getpagesize(), 1024);
+ }
+#endif