add legacy getloadavg api

diff --git a/include/stdlib.h b/include/stdlib.h
index bca1fb4194c43175b32bc1b54d8e9453cd8677c5..2bd5f1028319e279e40d0c9fd20a22debb9f953a 100644 (file)
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -139,6 +139,7 @@ int mkstemps (char *, int);
 int mkostemps (char *, int, int);
 void *valloc (size_t);
 void *memalign(size_t, size_t);
+int getloadavg(double *, int);
 #define WCOREDUMP(s) ((s) & 0x80)
 #define WIFCONTINUED(s) ((s) == 0xffff)
 #endif

diff --git a/src/legacy/getloadavg.c b/src/legacy/getloadavg.c
new file mode 100644 (file)
index 0000000..43a8c9e
--- /dev/null
+++ b/src/legacy/getloadavg.c
@@ -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;
+}