1 /*
2 * libjingle
3 * Copyright 2014 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifndef TALK_MEDIA_BASE_EXECUTABLEHELPERS_H_
29 #define TALK_MEDIA_BASE_EXECUTABLEHELPERS_H_
30
31 #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
32 #include <mach-o/dyld.h>
33 #endif
34
35 #include <string>
36
37 #include "webrtc/base/logging.h"
38 #include "webrtc/base/pathutils.h"
39
40 namespace rtc {
41
42 // Returns the path to the running executable or an empty path.
43 // TODO(thorcarpenter): Consolidate with FluteClient::get_executable_dir.
GetExecutablePath()44 inline Pathname GetExecutablePath() {
45 const int32_t kMaxExePathSize = 255;
46 #ifdef WIN32
47 TCHAR exe_path_buffer[kMaxExePathSize];
48 DWORD copied_length = GetModuleFileName(NULL, // NULL = Current process
49 exe_path_buffer, kMaxExePathSize);
50 if (0 == copied_length) {
51 LOG(LS_ERROR) << "Copied length is zero";
52 return rtc::Pathname();
53 }
54 if (kMaxExePathSize == copied_length) {
55 LOG(LS_ERROR) << "Buffer too small";
56 return rtc::Pathname();
57 }
58 #ifdef UNICODE
59 std::wstring wdir(exe_path_buffer);
60 std::string dir_tmp(wdir.begin(), wdir.end());
61 rtc::Pathname path(dir_tmp);
62 #else // UNICODE
63 rtc::Pathname path(exe_path_buffer);
64 #endif // UNICODE
65 #elif (defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)) || defined(WEBRTC_LINUX)
66 char exe_path_buffer[kMaxExePathSize];
67 #if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS)
68 uint32_t copied_length = kMaxExePathSize - 1;
69 if (_NSGetExecutablePath(exe_path_buffer, &copied_length) == -1) {
70 LOG(LS_ERROR) << "Buffer too small";
71 return rtc::Pathname();
72 }
73 #elif defined WEBRTC_LINUX
74 int32_t copied_length = kMaxExePathSize - 1;
75 const char* kProcExeFmt = "/proc/%d/exe";
76 char proc_exe_link[40];
77 snprintf(proc_exe_link, sizeof(proc_exe_link), kProcExeFmt, getpid());
78 copied_length = readlink(proc_exe_link, exe_path_buffer, copied_length);
79 if (copied_length == -1) {
80 LOG_ERR(LS_ERROR) << "Error reading link " << proc_exe_link;
81 return rtc::Pathname();
82 }
83 if (copied_length == kMaxExePathSize - 1) {
84 LOG(LS_ERROR) << "Probably truncated result when reading link "
85 << proc_exe_link;
86 return rtc::Pathname();
87 }
88 exe_path_buffer[copied_length] = '\0';
89 #endif // WEBRTC_LINUX
90 rtc::Pathname path(exe_path_buffer);
91 #else // Android || iOS
92 rtc::Pathname path;
93 #endif // Mac || Linux
94 return path;
95 }
96
97 } // namespace rtc
98
99 #endif // TALK_MEDIA_BASE_EXECUTABLEHELPERS_H_
100
101