get_rload.c revision a8bb11d0 
1
2#include <stdio.h>
3#include <X11/Intrinsic.h>
4#include <fcntl.h>
5#include <stdlib.h>
6#include <unistd.h>
7#include "xload.h"
8
9/* Not all OS supports get_rload
10   steal the STUB idea from get_load
11 */
12#if defined(QNX4) || defined(__CYGWIN__)
13#define RLOADSTUB
14#endif
15
16#ifdef RLOADSTUB
17void GetRLoadPoint(
18    Widget	w,		/* unused */
19    XtPointer	closure,	/* unused */
20    XtPointer	call_data)	/* pointer to (double) return value */
21
22{
23  *(double *)call_data = 1.0;
24}
25#else  /* RLOADSTUB */
26
27#include <protocols/rwhod.h>
28#ifndef _PATH_RWHODIR
29#define _PATH_RWHODIR "/var/spool/rwho"
30#endif
31
32#define WHDRSIZE        ((int)(sizeof (buf) - sizeof (buf.wd_we)))
33
34void GetRLoadPoint(
35    Widget	w,		/* unused */
36    XtPointer	closure,	/* unused */
37    XtPointer	call_data)	/* pointer to (double) return value */
38{
39  int f;
40  static char *fname = NULL;
41  static struct whod buf;
42  int cc;
43
44  *(double *)call_data = 0.0; /* to be on the safe side */
45
46  if (fname == NULL) {
47    if ((fname = malloc(strlen(_PATH_RWHODIR)+strlen("/whod.")+strlen(resources.remote)+1)) == NULL) {
48      fprintf(stderr,"GetRLoadPoint: malloc() failed\n");
49      exit(1);
50    }
51    strcpy(fname,_PATH_RWHODIR);
52    strcat(fname,"/whod.");
53    strcat(fname,resources.remote);
54  }
55  if ((f = open(fname, O_RDONLY, 0)) < 0)
56    return;
57
58  cc = read(f, &buf, sizeof(buf));
59  close(f);
60  if (cc < WHDRSIZE)
61    return;
62
63  *(double *)call_data = buf.wd_loadav[0] / 100.0;
64}
65
66#endif  /* RLOADSTUB */
67