load.c

   1 /*-
   2  * "THE BEER-WARE LICENSE" (Revision 42):
   3  * <tobias.rehbein@web.de> wrote this file. As long as you retain this notice
   4  * you can do whatever you want with this stuff. If we meet some day, and you
   5  * think this stuff is worth it, you can buy me a beer in return.
   6  *                                                              Tobias Rehbein
   7  */
   8
   9 #include <assert.h>
  10 #include <err.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <sysexits.h>
  14
  15 #include "buffers.h"
  16 #include "load.h"
  17
  18
  19 struct load_context {
  20         char            load_str[LOAD_BUFFLEN];
  21 };
  22
  23 struct load_context *
  24 load_context_open()
  25 {
  26         struct load_context *ctx;
  27
  28         if ((ctx = malloc(sizeof(*ctx))) == NULL)
  29                 err(EX_SOFTWARE, "malloc(%d) load_context", sizeof(*ctx));
  30
  31         return (ctx);
  32 }
  33
  34 void
  35 load_context_close(struct load_context *ctx)
  36 {
  37         assert(ctx != NULL);
  38
  39         free(ctx);
  40 }
  41
  42 char           *
  43 load_str(struct load_context *ctx)
  44 {
  45         double          la[3];
  46
  47         assert(ctx != NULL);
  48
  49         if (getloadavg(la, 3) == -1)
  50                 errx(EX_SOFTWARE, "getloadavg");
  51
  52         snprintf(ctx->load_str, sizeof(ctx->load_str), "%.2f %.2f %.2f", la[0], la[1], la[2]);
  53
  54         return (ctx->load_str);
  55 }