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
  29 #include <ctype.h>
  30 #include <errno.h>
  31 #include <math.h>
  32 #include <unistd.h>
  33
  34 #include <cstdio>
  35 #include <cstdlib>
  36 #include <cstring>
  37 #include <string>
  38
  39 #include "base/misc.hh"
  40 #include "sim/host.hh"
  41
  42 using namespace std;
  43
  44 string
  45 __get_hostname()
  46 {
  47     char host[256];
  48     if (gethostname(host, sizeof host) == -1)
  49         warn("could not get host name!");
  50     return host;
  51 }
  52
  53 string &
  54 hostname()
  55 {
  56     static string hostname = __get_hostname();
  57     return hostname;
  58 }
  59
  60 uint64_t
  61 procInfo(char *filename, char *target)
  62 {
  63     int  done = 0;
  64     char line[80];
  65     char format[80];
  66     long usage;
  67
  68     FILE *fp = fopen(filename, "r");
  69
  70     while (fp && !feof(fp) && !done) {
  71         if (fgets(line, 80, fp)) {
  72             if (strncmp(line, target, strlen(target)) == 0) {
  73                 snprintf(format, sizeof(format), "%s %%ld", target);
  74                 sscanf(line, format, &usage);
  75
  76                 fclose(fp);
  77                 return usage ;
  78             }
  79         }
  80     }
  81
  82     if (fp)
  83       fclose(fp);
  84
  85     return 0;
  86 }