hostinfo.cc revision 401 
1/*
2 * Copyright (c) 2003 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
42using namespace std;
43
44string
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
53string &
54hostname()
55{
56    static string hostname = __get_hostname();
57    return hostname;
58}
59
60uint64_t
61procInfo(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                sprintf(format, "%s %%lld", 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}
87