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 <stdio.h>
  37 #include <cstdlib>
  38 #include <cstring>
  39 #include <string>
  40
  41 #include "base/misc.hh"
  42 #include "sim/host.hh"
  43
  44 using namespace std;
  45
  46 string
  47 __get_hostname()
  48 {
  49     char host[256];
  50     if (gethostname(host, sizeof host) == -1)
  51         warn("could not get host name!");
  52     return host;
  53 }
  54
  55 string &
  56 hostname()
  57 {
  58     static string hostname = __get_hostname();
  59     return hostname;
  60 }
  61
  62 uint64_t
  63 procInfo(const char *filename, const char *target)
  64 {
  65     int  done = 0;
  66     char line[80];
  67     char format[80];
  68     long usage;
  69
  70     FILE *fp = fopen(filename, "r");
  71
  72     while (fp && !feof(fp) && !done) {
  73         if (fgets(line, 80, fp)) {
  74             if (strncmp(line, target, strlen(target)) == 0) {
  75                 snprintf(format, sizeof(format), "%s %%ld", target);
  76                 sscanf(line, format, &usage);
  77
  78                 fclose(fp);
  79                 return usage ;
  80             }
  81         }
  82     }
  83
  84     if (fp)
  85       fclose(fp);
  86
  87     return 0;
  88 }