src/base/hostinfo.cc

   1 /*
   2  * Copyright (c) 2003-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  */
  30
  31 #include <ctype.h>
  32 #include <errno.h>
  33 #include <math.h>
  34 #include <unistd.h>
  35
  36 #include <cstdlib>
  37 #include <cstring>
  38 #include <string>
  39
  40 #include "base/misc.hh"
  41 #include "sim/host.hh"
  42
  43 using namespace std;
  44
  45 string
  46 __get_hostname()
  47 {
  48     char host[256];
  49     if (gethostname(host, sizeof host) == -1)
  50         warn("could not get host name!");
  51     return host;
  52 }
  53
  54 string &
  55 hostname()
  56 {
  57     static string hostname = __get_hostname();
  58     return hostname;
  59 }
  60
  61 uint64_t
  62 procInfo(char *filename, char *target)
  63 {
  64     int  done = 0;
  65     char line[80];
  66     char format[80];
  67     long usage;
  68
  69     FILE *fp = fopen(filename, "r");
  70
  71     while (fp && !feof(fp) && !done) {
  72         if (fgets(line, 80, fp)) {
  73             if (strncmp(line, target, strlen(target)) == 0) {
  74                 snprintf(format, sizeof(format), "%s %%ld", target);
  75                 sscanf(line, format, &usage);
  76
  77                 fclose(fp);
  78                 return usage ;
  79             }
  80         }
  81     }
  82
  83     if (fp)
  84       fclose(fp);
  85
  86     return 0;
  87 }