xref: /openbmc/phosphor-hwmon/readd.cpp (revision 043d32306e00484afc446a44789b61869ea14f84)
1 /**
2  * Copyright © 2016 IBM Corporation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #include "config.h"
17 
18 #include "argument.hpp"
19 #include "mainloop.hpp"
20 #include "sysfs.hpp"
21 
22 #include <iostream>
23 #include <memory>
24 
25 static void exit_with_error(const char* err, char** argv)
26 {
27     ArgumentParser::usage(argv);
28     std::cerr << std::endl;
29     std::cerr << "ERROR: " << err << std::endl;
30     exit(-1);
31 }
32 
33 int main(int argc, char** argv)
34 {
35     // Read arguments.
36     auto options = std::make_unique<ArgumentParser>(argc, argv);
37 
38     // Parse out path argument.
39     auto path = (*options)["dev-path"];
40     auto param = path;
41     if (path != ArgumentParser::empty_string)
42     {
43         // This path may either be a device path (starts with
44         // /devices), or an open firmware device tree path.
45         if (path.substr(0, 8) == "/devices")
46         {
47             path = sysfs::findHwmonFromDevPath(path);
48         }
49         else
50         {
51             path = sysfs::findHwmonFromOFPath(path);
52         }
53     }
54 
55     if (path == ArgumentParser::empty_string)
56     {
57         path = (*options)["path"];
58         param = path;
59     }
60 
61     if (path == ArgumentParser::empty_string)
62     {
63         exit_with_error("Path not specified or invalid.", argv);
64     }
65 
66     // Finished getting options out, so cleanup the parser.
67     options.reset();
68 
69     // Determine the physical device sysfs path.
70     auto calloutPath = sysfs::findCalloutPath(path);
71     if (calloutPath.empty())
72     {
73         exit_with_error("Unable to determine callout path.", argv);
74     }
75 
76     MainLoop loop(sdbusplus::bus::new_default(), param, path, calloutPath,
77                   BUSNAME_PREFIX, SENSOR_ROOT);
78     loop.run();
79 
80     return 0;
81 }
82 
83 // vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
84