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swap_*: Port to OpenBSD

This commit is contained in:
Aaron Marcher 2018-05-06 01:20:46 +02:00
parent 417f473fe2
commit efb41724b5
2 changed files with 85 additions and 8 deletions

1
README
View file

@ -64,4 +64,3 @@ The following functions are not portable at the moment:
- wifi_{perc,essid}
- cpu_{perc,iowait}
- entropy
- swap_{free,perc,total,used}

View file

@ -1,11 +1,11 @@
/* See LICENSE file for copyright and license details. */
#if defined(__linux__)
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "../util.h"
#if defined(__linux__)
static size_t
pread(const char *path, char *buf, size_t bufsiz)
{
@ -118,5 +118,83 @@
return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
}
#elif defined(__OpenBSD__)
/* unimplemented */
#include <stdlib.h>
#include <sys/param.h> /* dbtob */
#include <sys/swap.h>
#include <sys/types.h>
#include <unistd.h>
#define dbtoqb(b) dbtob((int64_t)(b))
static void
getstats(int *total, int *used)
{
struct swapent *sep, *fsep;
int rnswap, nswap, i;
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap < 1)
fprintf(stderr, "swaptctl 'SWAP_NSWAP': %s\n", strerror(errno));
fsep = sep = calloc(nswap, sizeof(*sep));
if (sep == NULL)
fprintf(stderr, "calloc 'nswap': %s\n", strerror(errno));
rnswap = swapctl(SWAP_STATS, (void *)sep, nswap);
if (rnswap < 0)
fprintf(stderr, "swapctl 'SWAP_STATA': %s\n", strerror(errno));
if (nswap != rnswap)
fprintf(stderr, "SWAP_STATS != SWAP_NSWAP\n");
*total = 0;
*used = 0;
for (i = 0; i < rnswap; i++) {
*total += dbtoqb(sep->se_nblks);
*used += dbtoqb(sep->se_inuse);
}
free(fsep);
}
const char *
swap_free(void)
{
int total, used;
getstats(&total, &used);
return bprintf("%f", (float)(total - used) / 1024 / 1024 / 1024);
}
const char *
swap_perc(void)
{
int total, used;
getstats(&total, &used);
return bprintf("%d", 100 * used / total);
}
const char *
swap_total(void)
{
int total, used;
getstats(&total, &used);
return bprintf("%f", (float)total / 1024 / 1024 / 1024);
}
const char *
swap_used(void)
{
int total, used;
getstats(&total, &used);
return bprintf("%f", (float)used / 1024 / 1024 / 1024);
}
#endif