1 /*****************************************************************************/ 2 // Serial port transport add-on. 3 // 4 // Author 5 // Michael Pfeiffer 6 // 7 // This application and all source files used in its construction, except 8 // where noted, are licensed under the MIT License, and have been written 9 // and are: 10 // 11 // Copyright (c) 2001-2003 OpenBeOS Project 12 // 13 // Permission is hereby granted, free of charge, to any person obtaining a 14 // copy of this software and associated documentation files (the "Software"), 15 // to deal in the Software without restriction, including without limitation 16 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 17 // and/or sell copies of the Software, and to permit persons to whom the 18 // Software is furnished to do so, subject to the following conditions: 19 // 20 // The above copyright notice and this permission notice shall be included 21 // in all copies or substantial portions of the Software. 22 // 23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 24 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 25 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 26 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 27 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 28 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 29 // DEALINGS IN THE SOFTWARE. 30 /*****************************************************************************/ 31 32 #include <unistd.h> 33 #include <stdio.h> 34 35 #include <StorageKit.h> 36 #include <SupportKit.h> 37 38 #include "PrintTransportAddOn.h" 39 40 class SerialTransport : public BDataIO { 41 public: 42 SerialTransport(BDirectory* printer, BMessage* msg); 43 ~SerialTransport(); 44 45 status_t InitCheck() { return fFile > -1 ? B_OK : B_ERROR; } 46 47 ssize_t Read(void* buffer, size_t size); 48 ssize_t Write(const void* buffer, size_t size); 49 50 private: 51 int fFile; 52 }; 53 54 // Impelmentation of SerialTransport 55 SerialTransport::SerialTransport(BDirectory* printer, BMessage* msg) 56 : fFile(-1) 57 { 58 char address[80]; 59 char device[B_PATH_NAME_LENGTH]; 60 bool bidirectional = true; 61 62 unsigned int size = printer->ReadAttr("transport_address", B_STRING_TYPE, 0, address, sizeof(address)); 63 if (size <= 0 || size >= sizeof(address)) return; 64 address[size] = 0; // make sure string is 0-terminated 65 66 strcat(strcpy(device, "/dev/ports/"), address); 67 fFile = open(device, O_RDWR | O_EXCL, 0); 68 if (fFile < 0) { 69 // Try unidirectional access mode 70 bidirectional = false; 71 fFile = open(device, O_WRONLY | O_EXCL, 0); 72 } 73 74 if (fFile < 0) 75 return; 76 77 if (! msg) 78 // Caller don't care about transport init message output content... 79 return; 80 81 msg->what = 'okok'; 82 msg->AddBool("bidirectional", bidirectional); 83 msg->AddString("_serial/DeviceName", device); 84 85 } 86 87 SerialTransport::~SerialTransport() 88 { 89 if (InitCheck() == B_OK) 90 close(fFile); 91 } 92 93 ssize_t SerialTransport::Read(void* buffer, size_t size) 94 { 95 return read(fFile, buffer, size); 96 } 97 98 ssize_t SerialTransport::Write(const void* buffer, size_t size) 99 { 100 return write(fFile, buffer, size); 101 } 102 103 BDataIO* instantiate_transport(BDirectory* printer, BMessage* msg) 104 { 105 SerialTransport* transport = new SerialTransport(printer, msg); 106 if (transport->InitCheck() == B_OK) 107 return transport; 108 109 delete transport; 110 return NULL; 111 } 112 113 status_t list_transport_ports(BMessage* msg) 114 { 115 BDirectory dir("/dev/ports"); 116 status_t rc; 117 118 if ((rc=dir.InitCheck()) != B_OK) 119 return rc; 120 121 if ((rc=dir.Rewind()) != B_OK) 122 return rc; 123 124 entry_ref ref; 125 while(dir.GetNextRef(&ref) == B_OK) 126 msg->AddString("port_id", ref.name); 127 128 return B_OK; 129 } 130 131