get_rload.c revision 48e69166 
1/* $XFree86: xc/programs/xload/get_rload.c,v 1.4 2002/01/07 20:38:31 dawes Exp $ */
2
3#include <stdio.h>
4#include <X11/Intrinsic.h>
5#include <fcntl.h>
6#include <stdlib.h>
7#include <unistd.h>
8#include "xload.h"
9
10/* Not all OS supports get_rload
11   steal the STUB idea from get_load
12 */
13#if defined(QNX4) || defined(__CYGWIN__)
14#define RLOADSTUB
15#endif
16
17#ifdef RLOADSTUB
18void GetRLoadPoint(
19    Widget	w,		/* unused */
20    XtPointer	closure,	/* unused */
21    XtPointer	call_data)	/* pointer to (double) return value */
22
23{
24  *(double *)call_data = 1.0;
25}
26#else  /* RLOADSTUB */
27
28#include <protocols/rwhod.h>
29#ifndef _PATH_RWHODIR
30#define _PATH_RWHODIR "/var/spool/rwho"
31#endif
32
33#define WHDRSIZE        ((int)(sizeof (buf) - sizeof (buf.wd_we)))
34
35void GetRLoadPoint(
36    Widget	w,		/* unused */
37    XtPointer	closure,	/* unused */
38    XtPointer	call_data)	/* pointer to (double) return value */
39{
40  int f;
41  static char *fname = NULL;
42  static struct whod buf;
43  int cc;
44
45  *(double *)call_data = 0.0; /* to be on the safe side */
46
47  if (fname == NULL) {
48    if ((fname = malloc(strlen(_PATH_RWHODIR)+strlen("/whod.")+strlen(resources.remote)+1)) == NULL) {
49      fprintf(stderr,"GetRLoadPoint: malloc() failed\n");
50      exit(1);
51    }
52    strcpy(fname,_PATH_RWHODIR);
53    strcat(fname,"/whod.");
54    strcat(fname,resources.remote);
55  }
56  if ((f = open(fname, O_RDONLY, 0)) < 0)
57    return;
58
59  cc = read(f, &buf, sizeof(buf));
60  close(f);
61  if (cc < WHDRSIZE)
62    return;
63
64  *(double *)call_data = buf.wd_loadav[0] / 100.0;
65}
66
67#endif  /* RLOADSTUB */
68