nixCraft

gudivada213 · #1 (**permalink**) 23rd June 2009, 10:04 PM

Hi,

I have gps receiver log..its giving readings .like below

Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GPSD,R=1
$GPGSV,3,1,11,08,16,328,40,11,36,127,00,28,33,283, 39,20,11,165,00*71
$GPGSV,3,2,11,17,24,208,39,27,11,097,00,13,87,174, 00,19,31,042,00*70
$GPGSV,3,3,11,25,43,033,38,03,07,037,00,23,47,150, 00*44
$GPGGA,111503,0833.6323,N,07652.7685,E,1,04,1.60,1 6.69,M,-94.088,M,,*58
$GPRMC,111503,A,0833.6323,N,07652.7685,E,0.1866,25 6.540,220609,,*2A
$GPGSA,A,3,08,28,17,25,,,,,,,,,0.0,1.6,16.3*02
$GPGGA,111504,0833.6316,N,07652.7682,E,1,04,1.60,1 8.70,M,-94.088,M,,*58
$GPRMC,111504,A,0833.6316,N,07652.7682,E,0.1866,25 6.540,220609,,*2C
$GPGSA,A,3,08,28,17,25,,,,,,,,,0.0,1.6,16.3*02
$PGRME,0.00,M,0.00,M,0.00,M*1E
$GPGGA,111505,0833.6328,N,07652.7684,E,1,04,1.60,2 5.15,M,-94.088,M,,*5F
$GPRMC,111505,A,0833.6328,N,07652.7684,E,0.1488,23 8.090,220609,,*2A
$GPGSA,A,3,08,28,17,25,,,,,,,,,0.0,1.6,16.3*02
$GPGGA,111506,0833.6336,N,07652.7654,E,1,04,1.60,2 7.75,M,-94.088,M,,*5A
$GPRMC,111506,A,0833.6336,N,07652.7654,E,0.1866,25 6.540,220609,,*27
$GPGSA,A,3,08,28,17,25,,,,,,,,,0.0,1.6,16.3*02
$PGRME,0.00,M,0.00,M,0.00,M*1E
$GPGGA,111507,0833.6341,N,07652.7644,E,1,04,1.60,2 9.31,M,-94.088,M,,*54
$GPRMC,111507,A,0833.6341,N,07652.7644,E,0.1866,25 6.540,220609,,*27
$GPGSA,A,3,08,28,17,25,,,,,,,,,0.0,1.6,16.3*02
-
-
--
--
what i need?
Shell script has to check for each log line starting word with "$GPRMC", if line starts with $GPRMC, then that line has to append a new file data.txt

For example:

when i started the gps receiver log is giving
first line: Trying 127.0.0.1... has to check whether it is started with $GPRMC
then when the second line came log again has to check..like...up to terminating the log.
this process has to start when the log started...

if the line starts with $GPRMC the line has to append new line...

thanks in advance,

sravan

jaysunn · #2 (**permalink**) 24th June 2009, 11:25 PM

Please give this a try.

Code:

cat gps_log_file | grep GPRMC > data.txt

This will generate the following from your test data:

Code:

shine:bin jasonralph$ cat data1 | grep GPRMC 
$GPRMC,111503,A,0833.6323,N,07652.7685,E,0.1866,25 6.540,220609,,*2A
$GPRMC,111504,A,0833.6316,N,07652.7682,E,0.1866,25 6.540,220609,,*2C
$GPRMC,111505,A,0833.6328,N,07652.7684,E,0.1488,23 8.090,220609,,*2A
$GPRMC,111506,A,0833.6336,N,07652.7654,E,0.1866,25 6.540,220609,,*27
$GPRMC,111507,A,0833.6341,N,07652.7644,E,0.1866,25 6.540,220609,,*27

I created a file called data1 with your test data for the input file. Of course swap data1 file out for your log file.

Good Luck

Jaysunn

amitabh · #3 (**permalink**) 28th June 2009, 09:10 PM

Code:

cat gps_log_file | grep GPRMC >> data.txt

If you need to append to the same file use the double redirection.

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nixCraft

shell script to read a line in gps receiver log file and append that line to new file

shell script to read a line in gps receiver log file and append that line to new file

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