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add legacy getloadavg api

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Szabolcs Nagy
2013-11-21 01:59:43 +00:00
parent ceb0ed9cf9
commit a516077feb
2 changed files with 19 additions and 0 deletions
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1
include/stdlib.h
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@ -139,6 +139,7 @@ int mkstemps (char *, int);
int mkostemps (char *, int, int); int mkostemps (char *, int, int);
void *valloc (size_t); void *valloc (size_t);
void *memalign(size_t, size_t); void *memalign(size_t, size_t);
int getloadavg(double *, int);
#define WCOREDUMP(s) ((s) & 0x80) #define WCOREDUMP(s) ((s) & 0x80)
#define WIFCONTINUED(s) ((s) == 0xffff) #define WIFCONTINUED(s) ((s) == 0xffff)
#endif #endif

18
src/legacy/getloadavg.c Normal file
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@ -0,0 +1,18 @@
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int getloadavg(double *a, int n)
{
int i;
double b[3];
FILE *f = fopen("/proc/loadavg", "rbe");
if (!f) return -1;
i = fscanf(f, "%lf %lf %lf", b, b+1, b+2);
fclose(f);
if (n > i) n = i;
if (n < 0) return -1;
memcpy(a, b, n * sizeof *a);
return n;
}