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Top Forums Shell Programming and Scripting shell script to replicate the log files from one location to another in real time Post 302510932 by lookinginfo on Tuesday 5th of April 2011 10:29:05 AM
Old 04-05-2011
Thanks all to provide the useful information.

Let me give some more background

There are two physical servers which are tie to a SAN disk. One server is active[A] and the other is standby[B].At any given time, only active server has mount to the san disk which means access to /app/logs/error.log

If active server has problem, then it will failover to standby server and that server become active and will have access to /app/logs/error.log


The idea is

1) if server A is active, and app is generating the logs in error.log, then copy that into server A /var/error.log. so lets say if there are three errors 1,2,3, then it should copy those three into var/error.log on server A

2) if server B is active, and app is generating the logs in error.log, then copy that into server B /var/errorl.log. so lets say if there are new errors 4,5,6, then it should copy those new errors into var/error.log on server B.

The error.log file never rollback / truncated. it just keep growing.

Not sure how to handle this situation. if the error.log file is too big and someone decided to archive and empty the file.

i think we need some well structured shell script
 

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load_dat_font(3alleg4)						  Allegro manual					    load_dat_font(3alleg4)

NAME
load_dat_font - Loads a FONT from an Allegro datafile. SYNOPSIS
#include <allegro.h> FONT *load_dat_font(const char *filename, RGB *pal, void *param) DESCRIPTION
Loads a FONT from an Allegro datafile. You can set param parameter to point to an array that holds two strings that identify the font and the palette in the datafile by name. The first string in this list is the name of the font. You can pass NULL here to just load the first font found in the datafile. The second string can be used to specify the name of the palette associated with the font. This is only returned if the pal parameter is not NULL. If you pass NULL for the name of the palette, the last palette found before the font was found is returned. You can also pass NULL for param, which is treated as if you had passed NULL for both strings separately. In this case, the function will simply load the first font it finds from the datafile and the palette that precedes it. For example, suppose you have a datafile named `fonts.dat' with the following contents: FONT FONT_1_DATA FONT FONT_2_DATA FONT FONT_3_DATA PAL FONT_1_PALETTE PAL FONT_2_PALETTE Then the following code will load FONT_1_DATA as a FONT and return FONT_1_PALETTE as the palette: FONT *f; PALETTE pal; char *names[] = { "FONT_1_DATA", "FONT_1_PALETTE" } f = load_dat_font("fonts.dat", pal, names); If instead you want to load the second font, FONT_2, from the datafile, you would use: FONT *f; PALETTE pal; char *names[] = { "FONT_2_DATA", "FONT_2_PALETTE" } f = load_dat_font("fonts.dat", pal, names); If you want to load the third font, but not bother with a palette, use: FONT *f; char *names[] = { "FONT_3_DATA", NULL } f = load_dat_font("fonts.dat", NULL, names); RETURN VALUE
Returns a pointer to the font or NULL on error. Remember that you are responsible for destroying the font when you are finished with it to avoid memory leaks. SEE ALSO
register_font_file_type(3alleg4), load_font(3alleg4) Allegro version 4.4.2 load_dat_font(3alleg4)
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