1 //------------------------------------------------------------------------------ 2 // Copyright (c) 2001-2002, OpenBeOS 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a 5 // copy of this software and associated documentation files (the "Software"), 6 // to deal in the Software without restriction, including without limitation 7 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 // and/or sell copies of the Software, and to permit persons to whom the 9 // Software is furnished to do so, subject to the following conditions: 10 // 11 // The above copyright notice and this permission notice shall be included in 12 // all copies or substantial portions of the Software. 13 // 14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 // DEALINGS IN THE SOFTWARE. 21 // 22 // File Name: AppMisc.cpp 23 // Author: Ingo Weinhold (bonefish@users.sf.net) 24 // Description: Miscellaneous private functionality. 25 //------------------------------------------------------------------------------ 26 27 #include <string.h> 28 29 #include <AppMisc.h> 30 #include <Entry.h> 31 #include <image.h> 32 #include <OS.h> 33 34 namespace BPrivate { 35 36 // get_app_path 37 /*! \brief Returns the path to the application's executable. 38 \param buffer A pointer to a pre-allocated character array of at least 39 size B_PATH_NAME_LENGTH to be filled in by this function. 40 \return 41 - \c B_OK: Everything went fine. 42 - \c B_BAD_VALUE: \c NULL \a buffer. 43 - another error code 44 */ 45 status_t 46 get_app_path(char *buffer) 47 { 48 // The only way to get the path to the application's executable seems to 49 // be to get an image_info of its image, which also contains a path. 50 // Several images may belong to the team (libraries, add-ons), but only 51 // the one in question should be typed B_APP_IMAGE. 52 status_t error = (buffer ? B_OK : B_BAD_VALUE); 53 image_info info; 54 int32 cookie = 0; 55 bool found = false; 56 if (error == B_OK) { 57 while (!found && get_next_image_info(0, &cookie, &info) == B_OK) { 58 if (info.type == B_APP_IMAGE) { 59 strncpy(buffer, info.name, B_PATH_NAME_LENGTH - 1); 60 buffer[B_PATH_NAME_LENGTH - 1] = 0; 61 found = true; 62 } 63 } 64 } 65 if (error == B_OK && !found) 66 error = B_ENTRY_NOT_FOUND; 67 return error; 68 } 69 70 // get_app_ref 71 /*! \brief Returns an entry_ref referring to the application's exectable. 72 \param ref A pointer to a pre-allocated entry_ref to be initialized 73 to an entry_ref referring to the application's executable. 74 \param traverse If \c true, the function traverses symbolic links. 75 \return 76 - \c B_OK: Everything went fine. 77 - \c B_BAD_VALUE: \c NULL \a ref. 78 - another error code 79 */ 80 status_t 81 get_app_ref(entry_ref *ref, bool traverse) 82 { 83 status_t error = (ref ? B_OK : B_BAD_VALUE); 84 char appFilePath[B_PATH_NAME_LENGTH]; 85 if (error == B_OK) 86 error = get_app_path(appFilePath); 87 if (error == B_OK) { 88 BEntry entry(appFilePath, traverse); 89 error = entry.GetRef(ref); 90 } 91 return error; 92 } 93 94 // current_team 95 /*! \brief Returns the ID of the current team. 96 \return The ID of the current team. 97 */ 98 team_id 99 current_team() 100 { 101 team_id team = -1; 102 thread_info info; 103 if (get_thread_info(find_thread(NULL), &info) == B_OK) 104 team = info.team; 105 return team; 106 } 107 108 // main_thread_for 109 /*! Returns the ID of the supplied team's main thread. 110 \param team The team. 111 \return 112 - The thread ID of the supplied team's main thread 113 - \c B_BAD_TEAM_ID: The supplied team ID does not identify a running team. 114 - another error code 115 */ 116 thread_id 117 main_thread_for(team_id team) 118 { 119 // For I can't find any trace of how to explicitly get the main thread, 120 // I assume the main thread is the one with the least thread ID. 121 thread_id thread = B_BAD_TEAM_ID; 122 int32 cookie = 0; 123 thread_info info; 124 while (get_next_thread_info(team, &cookie, &info) == B_OK) { 125 if (thread < 0 || info.thread < thread) 126 thread = info.thread; 127 } 128 return thread; 129 } 130 131 } // namespace BPrivate 132 133