2 pike comment // LPD.pmod: an implementation of the BSD lpd protocol (RFC 1179).
3 pike comment // This is a module for pike.
4 pike comment // 3 July 1998 <hww3@riverweb.com> Bill Welliver
6 pike comment // $Id: LPD.pmod,v 1.10 2008/01/13 17:02:43 nilsson Exp $
9 pike code #pike __REAL_VERSION__
11 pike comment //! A client for communicating with printers and print spoolers that
12 pike comment //! support the BSD lpd protocol (RFC 1179).
13 pike code class client {
14 pike code string host;
16 pike code private object conn;
18 pike code string jobtype;
19 pike code string jobname;
21 pike code private int connect(string host, int port)
23 pike code int a=random(10);
24 pike comment // try to open one of the "official" local socket ports.
25 pike comment // not having one doesn't seem to be a problem with most LPD
26 pike comment // servers, but we should at least try. will probably fail
27 pike comment // if two try to open the same local port at once. ymmv.
28 pike code int res=conn->open_socket(721 + a);
30 pike code return conn->connect(host, port);
33 pike comment //! @decl int set_job_type(string type)
34 pike comment //! Set the type of job to be sent to the printer to @i{type@}.
35 pike comment //! Valid types are: text, postscript and raw.
36 pike code int set_job_type(string type)
38 pike code type=lower_case(type);
40 pike code switch (type) {
42 pike code case "text":
43 pike code jobtype="f";
47 pike code case "postscript":
49 pike code jobtype="o";
55 pike code jobtype="l";
61 pike comment //! @decl int set_job_name(string name)
62 pike comment //! Sets the name of the print job to @i{name@}.
63 pike code int set_job_name(string name)
65 pike code jobname=name;
69 pike comment //! @decl int start_queue(string queue)
70 pike comment //! Start the queue @i{queue@} if not already printing.
71 pike comment //! @returns
72 pike comment //! Returns 0 if unable to connect, 1 otherwise.
73 pike code int start_queue(string queue)
75 pike code if(!queue) return 0;
77 pike code if(!connect(host, port))
80 pike code conn->write(sprintf("%c%s\n", 01, queue));
81 pike code string resp= conn->read();
82 pike code conn->close();
86 pike comment //! @decl string|int send_job(string queue, string job)
87 pike comment //! Send print job consisting of data @i{job@} to printer @i{queue@}.
88 pike comment //! @returns
89 pike comment //! Returns 1 if success, 0 otherwise.
90 pike code int send_job(string queue, string job)
92 pike code string resp;
94 pike code if(!queue) return 0;
96 pike code if(!connect(host, port))
98 pike comment // werror("connected to " + host + "\n");
100 pike code string control="";
101 pike code control+="H"+gethostname()+"\n";
102 pike code #if constant(getuid) && constant(getpwuid)
103 pike code control+="P"+(getpwuid(getuid())[0]||"nobody")+"\n";
105 pike code control+="P-1\n";
107 pike code control+=(jobtype||"l")+"dfA"+ sprintf("%03d%s", jobnum, gethostname())+"\n";
108 pike code if(jobname)
110 pike code control+="J" + jobname + "\n";
111 pike code control+="N" + jobname + "\n";
115 pike code control+="JPike LPD Client Job " + jobnum + "\n";
116 pike code control+="NPike LPD Client Job " + jobnum + "\n";
119 pike code werror("job file:\n\n" + control + "\n\n");
121 pike code conn->write(sprintf("%c%s\n", 02, queue));
122 pike code resp=conn->read(1);
123 pike code if((int)resp !=0)
125 pike code werror("receive job failed.\n");
129 pike code conn->write(sprintf("%c%s cfA%03d%s\n", 02, (string)sizeof(control),
130 pike code jobnum,gethostname()));
132 pike code resp=conn->read(1);
133 pike code if((int)resp !=0)
135 pike code werror("request receive control failed.\n");
139 pike code conn->write(sprintf("%s%c", control, 0));
141 pike code resp=conn->read(1);
142 pike code if((int)resp !=0)
144 pike code werror("send receive control failed.\n");
148 pike code conn->write(sprintf("%c%s dfA%03d%s\n", 03, (string)sizeof(job), jobnum,
149 pike code gethostname()));
150 pike code resp=conn->read(1);
151 pike code if((int)resp !=0)
153 pike code werror("request receive job failed.\n");
158 pike code conn->write(sprintf("%s%c", job, 0));
160 pike code resp=conn->read(1);
161 pike code if((int)resp !=0)
163 pike code werror("send receive job failed.\n");
169 pike comment // read the response.
171 pike comment // resp=conn->read();
172 pike code if((int)(resp)!=0)
174 pike code conn->close();
177 pike code conn->close();
178 pike comment // start_queue(queue);
182 pike comment //! @decl int delete_job(string queue, int|void job)
183 pike comment //! Delete job @i{job@} from printer @i{queue@}.
184 pike comment //! @returns
185 pike comment //! Returns 1 on success, 0 otherwise.
186 pike code int delete_job(string queue, int|void job)
188 pike code if(!queue) return 0;
190 pike code if(!connect(host, port))
193 pike code #if constant(getpwuid) && constant(getuid)
194 pike code string agent=(getpwuid(getuid())[0]||"nobody");
196 pike code string agent="nobody";
200 pike code conn->write(sprintf("%c%s %s %d\n", 05, queue, agent, job));
202 pike code conn->write(sprintf("%c%s %s\n", 05, queue, agent));
203 pike code string resp= conn->read();
204 pike code conn->close();
209 pike comment //! @decl string|int status(string queue)
210 pike comment //! Check the status of queue @i{queue@}.
211 pike comment //! @returns
212 pike comment //! Returns 0 on failure, otherwise returns the status response from the printer.
213 pike code string|int status(string queue)
215 pike code if(!queue) return 0;
217 pike code if(!connect(host, port))
220 pike code conn->write(sprintf("%c%s\n", 04, queue));
221 pike code string resp= conn->read();
222 pike code conn->close();
223 pike code return resp;
226 pike comment //! Create a new LPD client connection.
227 pike comment //! @param hostname
228 pike comment //! Contains the hostname or ipaddress of the print host.
229 pike comment //! if not provided, defaults to @i{localhost@}.
230 pike comment //! @param portnum
231 pike comment //! Contains the port the print host is listening on.
232 pike comment //! if not provided, defaults to port @i{515@}, the RFC 1179 standard.
233 pike code void create(string|void hostname, int|void portnum)
235 pike code host=hostname || "localhost";
236 pike code port=portnum || 515;
237 pike code conn=Stdio.File();