Pattern String Input:
\\ = Backslash \a = Alert (bell) \b = Backspace
\f = Formfeed \n = Newline \r = Carriage Return
\t = Tab \v = Vertical Tab \e or \E = Escape
\ddd = Octal Value \xdd or \Xdd = Hexadecimal Value
This addition makes testing of terminals and printers easier.
NOTE: Ensure the cable used for testing supports modem signals (DSR, CD, CTS, & RTS) or loss of data or partial reads may occur, especially at high speeds. The terminal driver may simply block read/write requests waiting for assertion of certain modem signals.
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Last modified: February 22, 1996
Example 1: Shows new pattern string mapping, a data compare error reporting:
% dt if=/dev/rrz1b records=3 pattern="This is \xFF my test \a ^c^q^s^z pattern\r\n" dt: Data compare error at byte 0 in record number 1 dt: Relative block number where the error occcured is 0 dt: Data expected = 0x54, data found = 0x61, byte count = 512 dt: Pattern buffer pointer = 0x14000e000, data buffer pointer = 0x140012000 dt: The incorrect data starts at address 0x14000e000 (marked by asterisk '*') dt: Dumping Pattern Buffer (base = 0x14000e000, offset = 0, limit = 34 bytes): 0x14000e000 *54 68 69 73 20 69 73 20 ff 20 6d 79 20 74 65 73 0x14000e010 74 20 07 20 03 11 13 1a 20 70 61 74 74 65 72 6e 0x14000e020 0d 0a dt: The incorrect data starts at address 0x140012000 (marked by asterisk '*') dt: Dumping Data Buffer (base = 0x140012000, offset = 0, limit = 64 bytes): 0x140012000 *61 62 63 64 65 66 68 68 69 6a 6b 6c 6d 6e 6f 70 0x140012010 71 72 73 74 75 76 77 78 79 7a 30 31 32 33 34 35 0x140012020 36 37 38 39 30 0d 0a 61 62 63 64 65 66 68 68 69 0x140012030 6a 6b 6c 6d 6e 6f 70 71 72 73 74 75 76 77 78 79 dt: Error number 1 occurred on Sat Jul 22 13:02:04 1995 Total Statistics: Input device/file name: /dev/rrz1b (Device: RZ26L, type=disk) Data pattern string used: 'This is \xFF my test \a ^c^q^s^z pattern\r\n' Data pattern read: 0x73696854 (first 4 bytes) Total records processed: 1 @ 512 bytes/record (0.500 Kbytes) Total bytes transferred: 512 (0.500 Kbytes, 0.000 Mbytes) Average transfer rates: 30720 bytes/sec, 30.000 Kbytes/sec Total passes completed: 0/1 Total errors detected: 1/1 Total elapsed time: 00m00.01s Total system time: 00m00.00s Total user time: 00m00.00s Starting time: Sat Jul 22 13:02:04 1995 Ending time: Sat Jul 22 13:02:04 1995 %
Example 2: Show modem control testing using hardware (CTS/RTS) flow control:
im2fast% dt if=/dev/tty01 of=/dev/tty00 bs=64 limit=100k pattern="^SRobin's Test Pattern\n^Q" enable=debug,modem speed=38400 flow=cts_rts dt: Attempting to open input file '/dev/tty01', mode = 04... dt: Input file '/dev/tty01' successfully opened, fd = 4 dt: Saving current terminal characteristics, fd = 4... dt: Setting up test terminal characteristics, fd = 4... -------------------------------------------------- Modem Signals Set: 0x6 0x2 = TIOCM_DTR = Data Terminal Ready. 0x4 = TIOCM_RTS = Request To Send. -------------------------------------------------- dt: Attempting to open output file '/dev/tty00', mode = 05... dt: Output file '/dev/tty00' successfully opened, fd = 10 dt: Saving current terminal characteristics, fd = 10... dt: Setting up test terminal characteristics, fd = 10... -------------------------------------------------- Modem Signals Set: 0x166 0x2 = TIOCM_DTR = Data Terminal Ready. 0x4 = TIOCM_RTS = Request To Send. 0x20 = TIOCM_CTS = Clear To Send. 0x40 = TIOCM_CAR = Carrier Detect. 0x100 = TIOCM_DSR = Data Set Ready. -------------------------------------------------- dt (24197): Closing file '/dev/tty01', fd = 4... dt (24197): Parent PID (Writer) = 24197, Child PID (Reader) = 10042 dt (10042): Closing file '/dev/tty00', fd = 10... dt (10042): Allocated buffer at address 0x140012000 of 68 bytes, using offset 0 dt (24197): Allocated buffer at address 0x140012000 of 68 bytes, using offset 0 dt (24197): Characters remaining in output queue = 320 dt (24197): Waiting for output queue to drain... dt (24197): Output queue finished draining... Total Statistics (24197): Output device/file name: /dev/tty00 (device type=terminal) Terminal characteristics: flow=cts_rts, parity=none, speed=38400 Data pattern string used: '^SRobin's Test Pattern\n^Q' Data pattern written: 0x626f5213 (read verify disabled) Total records processed: 1600 @ 64 bytes/record (0.062 Kbytes) Total bytes transferred: 102400 (100.000 Kbytes, 0.098 Mbytes) Average transfer rates: 3497 bytes/sec, 3.415 Kbytes/sec Total passes completed: 1/1 Total errors detected: 0/1 Total elapsed time: 00m29.28s Total system time: 00m00.05s Total user time: 00m00.01s Starting time: Mon Jul 24 14:26:02 1995 Ending time: Mon Jul 24 14:26:32 1995 dt (24197): Waiting for child PID 10042 to exit... Total Statistics (10042): Input device/file name: /dev/tty01 (device type=terminal) Terminal characteristics: flow=cts_rts, parity=none, speed=38400 Data pattern string used: '^SRobin's Test Pattern\n^Q' Data pattern read: 0x626f5213 (first 4 bytes) Total records processed: 1600 @ 64 bytes/record (0.062 Kbytes) Total bytes transferred: 102400 (100.000 Kbytes, 0.098 Mbytes) Average transfer rates: 3383 bytes/sec, 3.304 Kbytes/sec Total passes completed: 1/1 Total errors detected: 0/1 Total elapsed time: 00m30.26s Total system time: 00m00.15s Total user time: 00m00.06s Starting time: Mon Jul 24 14:26:02 1995 Ending time: Mon Jul 24 14:26:32 1995 dt (10042): Restoring saved terminal characteristics, fd = 4... dt (10042): Closing file '/dev/tty01', fd = 4... dt (24197): Child PID 10042, exited with status = 0 dt (24197): Restoring saved terminal characteristics, fd = 10... dt (24197): Closing file '/dev/tty00', fd = 10... im2fast%