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1.1 root 1: /*
2: *
3: * POSTBEGIN, if it's not NULL, is some PostScript code that's sent to the printer
4: * before any of the input files. It's not terribly important since the same thing
5: * can be accomplished in other ways, but this approach is convenient. POSTBEGIN
6: * is initialized so as to disable job timeouts. The string can also be set on the
7: * command line using the -P option.
8: *
9: */
10:
11: #define POSTBEGIN "statusdict /waittimeout 0 put\n"
12:
13: /*
14: *
15: * The following help determine where postio is when it's running - either in the
16: * START, SEND, or DONE states. Primarily controls what's done in getstatus().
17: * RADIAN occasionally had problems with two way conversations. Anyway this stuff
18: * can be used to prevent status queries while we're transmitting a job. Enabled
19: * by the -q option.
20: *
21: */
22:
23: #define NOTCONNECTED 0
24: #define START 1
25: #define SEND 2
26: #define DONE 3
27:
28: /*
29: *
30: * Previous versions of postio only ran as a single process. That was (and still
31: * is) convenient, but meant we could only flow control one direction. Data coming
32: * back from the printer occasionally got lost, but that didn't often hurt (except
33: * for lost error messages). Anyway I've added code that lets you split the program
34: * into separate read and write processes, thereby helping to prevent data loss in
35: * both directions. It should be particularly useful when you're sending a job that
36: * you expect will be returning useful data over the communications line.
37: *
38: * The next three definitions control what's done with data on communications line.
39: * The READ flag means the line can be read, while the WRITE flag means it can be
40: * written. When we're running as a single process both flags are set. I tried to
41: * overlay the separate read/write process code on what was there and working for
42: * one process. The implementation isn't as good as it could be, but should be
43: * safe. The single process version still works, and remains the default.
44: *
45: */
46:
47: #define READ 1
48: #define WRITE 2
49: #define READWRITE 3
50:
51: /*
52: *
53: * Messages generated on the printer and returned over the communications line
54: * look like,
55: *
56: * %%[ status: idle; source: serial 25 ]%%
57: * %%[ status: waiting; source: serial 25 ]%%
58: * %%[ status: initializing; source: serial 25 ]%%
59: * %%[ status: busy; source: serial 25 ]%%
60: * %%[ status: printing; source: serial 25 ]%%
61: * %%[ status: PrinterError: out of paper; source: serial 25 ]%%
62: * %%[ status: PrinterError: no paper tray; source: serial 25 ]%%
63: *
64: * %%[ PrinterError: out of paper; source: serial 25 ]%%
65: * %%[ PrinterError: no paper tray; source: serial 25 ]%%
66: *
67: * %%[ Error: undefined; OffendingCommand: xxx ]%%
68: * %%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
69: *
70: * although the list isn't meant to be complete.
71: *
72: * The following constants are used to classify the recognized printer states.
73: * readline() reads complete lines from ttyi and stores them in array mesg[].
74: * getstatus() looks for the "%%[ " and " ]%%" delimiters that bracket printer
75: * messages and if found it tries to parse the enclosed message. After the lookup
76: * one of the following numbers is returned as an indication of the existence or
77: * content of the printer message. The return value is used in start(), send(),
78: * and done() to figure out what's happening and what can be done next.
79: *
80: */
81:
82: #define BUSY 0 /* processing data already sent */
83: #define WAITING 1 /* printer wants more data */
84: #define PRINTING 2 /* printing a page */
85: #define IDLE 3 /* ready to start the next job */
86: #define ENDOFJOB 4 /* readline() builds this up on EOF */
87: #define PRINTERERROR 5 /* PrinterError - eg. out of paper */
88: #define ERROR 6 /* some kind of PostScript error */
89: #define FLUSHING 7 /* throwing out the rest of the job */
90: #define INITIALIZING 8 /* printer is booting */
91: #define DISCONNECT 9 /* from Datakit! */
92: #define UNKNOWN 10 /* in case we missed anything */
93: #define NOSTATUS 11 /* no response from the printer */
94:
95: #define WRITEPROCESS 12 /* dummy states for write process */
96: #define INTERACTIVE 13 /* and interactive mode */
97:
98: /*
99: *
100: * An array of type Status is used, in getstatus(), to figure out the printer's
101: * current state. Just helps convert strings representing the current state into
102: * integer codes that other routines use.
103: *
104: */
105:
106: typedef struct {
107: char *state; /* printer's current status */
108: int val; /* value returned by getstatus() */
109: } Status;
110:
111: /*
112: *
113: * STATUS is used to initialize an array of type Status that translates the ASCII
114: * strings returned by the printer into appropriate codes that can be used later
115: * on in the program. getstatus() converts characters to lower case, so if you
116: * add any entries make them lower case and put them in before the UNKNOWN entry.
117: * The lookup terminates when we get a match or when an entry with a NULL state
118: * is found.
119: *
120: */
121:
122: #define STATUS \
123: \
124: { \
125: "busy", BUSY, \
126: "waiting", WAITING, \
127: "printing", PRINTING, \
128: "idle", IDLE, \
129: "endofjob", ENDOFJOB, \
130: "printererror", PRINTERERROR, \
131: "error", ERROR, \
132: "flushing", FLUSHING, \
133: "initializing", INITIALIZING, \
134: NULL, UNKNOWN \
135: }
136:
137: /*
138: *
139: * The baud rate can be set on the command line using the -b option. If you omit
140: * it BAUDRATE will be used.
141: *
142: */
143:
144: #define BAUDRATE B9600
145:
146: /*
147: *
148: * An array of type Baud is used, in routine getbaud(), to translate ASCII strings
149: * into termio values that represent the requested baud rate.
150: *
151: */
152:
153: typedef struct {
154: char *rate; /* string identifying the baud rate */
155: short val; /* and its termio.h value */
156: } Baud;
157:
158: /*
159: *
160: * BAUDTABLE initializes the array that's used to translate baud rate requests
161: * into termio values. It needs to end with an entry that has NULL assigned to
162: * the rate field.
163: *
164: */
165:
166: #define BAUDTABLE \
167: \
168: { \
169: "9600", B9600, \
170: "B9600", B9600, \
171: "19200", EXTA, \
172: "19.2", EXTA, \
173: "B19200", EXTA, \
174: "EXTA", EXTA, \
175: "1200", B1200, \
176: "B1200", B1200, \
177: "2400", B2400, \
178: "B2400", B2400, \
179: "B4800", B4800, \
180: "4800", B4800, \
181: "38400", EXTB, \
182: "38.4", EXTB, \
183: "B38400", EXTB, \
184: "EXTB", EXTB, \
185: NULL, B9600 \
186: }
187:
188: /*
189: *
190: * A few miscellaneous definitions. BLOCKSIZE is the default size of the buffer
191: * used for reading the input files (changed with the -B option). MESGSIZE is the
192: * size of the character array used to store printer status lines - don't make it
193: * too small!
194: *
195: */
196:
197: #define BLOCKSIZE 2048
198: #define MESGSIZE 512
199:
200: /*
201: *
202: * Some of the non-integer valued functions used in postio.c.
203: *
204: */
205:
206: char *find();
207:
208: char *malloc();
209: char *strtok();
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