IABSD.fr/xenocara/app/xload/get_rload.c

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• Author : matthieu
  Date : 2006-11-25 20:07:29
  Hash : 616b6f15
  Message : Importing from X.Org 7.2RC2

• app/xload/get_rload.c

• /* $XFree86: xc/programs/xload/get_rload.c,v 1.4 2002/01/07 20:38:31 dawes Exp $ */
  
  #include <stdio.h>
  #include <X11/Intrinsic.h>
  #include <fcntl.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include "xload.h"
  
  /* Not all OS supports get_rload
     steal the STUB idea from get_load
   */
  #if defined(QNX4) || defined(__CYGWIN__)
  #define RLOADSTUB
  #endif
  
  #ifdef RLOADSTUB
  void GetRLoadPoint( w, closure, call_data )
       Widget   w;              /* unused */
       XtPointer  closure;        /* unused */
       XtPointer  call_data;      /* pointer to (double) return value */
  
  {
    *(double *)call_data = 1.0;
  }
  #else  /* RLOADSTUB */
  
  #include <protocols/rwhod.h>
  #ifndef _PATH_RWHODIR
  #define _PATH_RWHODIR "/var/spool/rwho"
  #endif
  
  typedef struct _XLoadResources {
    Boolean show_label;
    Boolean use_lights;
    String remote;
  } XLoadResources;
  
  extern XLoadResources resources ;
  
  #define WHDRSIZE        ((int)(sizeof (buf) - sizeof (buf.wd_we)))
  
  void GetRLoadPoint( w, closure, call_data )
       Widget   w;              /* unused */
       XtPointer  closure;        /* unused */
       XtPointer  call_data;      /* pointer to (double) return value */
  
  {
    int f;
    static char *fname = NULL;
    static struct whod buf;
    int cc;
  
    *(double *)call_data = 0.0; /* to be on the safe side */
  
    if (fname == NULL) {
      if ((fname = malloc(strlen(_PATH_RWHODIR)+strlen("/whod.")+strlen(resources.remote)+1)) == NULL) {
        fprintf(stderr,"GetRLoadPoint: malloc() failed\n");
        exit(1);
      }
      strcpy(fname,_PATH_RWHODIR);
      strcat(fname,"/whod.");
      strcat(fname,resources.remote);
    }
    if ((f = open(fname, O_RDONLY, 0)) < 0)
      return;
  
    cc = read(f, &buf, sizeof(buf));
    close(f);
    if (cc < WHDRSIZE)
      return;
  
    *(double *)call_data = buf.wd_loadav[0] / 100.0;
  }
  
  #endif  /* RLOADSTUB */