victor16,

Когда-то что-то похожее писал на Pyton -
как домашнее задание:
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import sys, string, binascii

## Time stamp of checkpoint 0x16bb17
## Time of checkpoint 11/14/2002 17:55:55
## Logical log unique identifier 155
## Logical log position at Ckpt 0x5018 (Page 5, byte 24)

## Log file number 5
## Unique identifier 155
## Log contains last checkpoint: Page 5, byte 24
## Log file flags 0x3 Log file in use
## & Current log file
## Physical location 0x100acb
## Log size 500 (p)
## Number pages used 6
## Date/Time file filled -
## Time stamp -

Time_stamp = [];
Time_chkpt = [];
Log_unid = [];
Log_pos = [];

d_pr = 'C:\\informix\\support\\oncheck_pr.txt'

f_pr = open( d_pr, 'rb' )
str = f_pr.readline()
while str:
str = str[:-2]
if ( string.find( str, "Time stamp of checkpoint" ) != -1 ) :
Time_stamp = string.split( str )
if ( string.find( str, "Time of checkpoint" ) != -1 ) :
Time_chkpt = string.split( str )
if ( string.find( str, "Logical log unique identifier" ) != -1 ) :
Log_unid = string.split( str )
if ( string.find( str, "Logical log position at Ckpt" ) != -1 ) :
Log_pos = string.split( str )
if ( string.find( str, "Log file number" ) != -1 ) :
Log_number = [];
Log_number = string.split( str )
str = f_pr.readline()
str = str[:-2]
if ( string.find( str, "Unique identifier" ) != -1 ) :
Unique_id = [];
Unique_id = string.split( str )
if Log_unid[4] == Unique_id[2] :
break
str = f_pr.readline()
f_pr.close()
print "\n Time stamp of checkpoint .... -> " + Time_stamp[4]
print "\n Time of checkpoint .......... -> " + Time_chkpt[3] + " " + Time_chkpt[4]
print "\n Log file number ............. -> " + Log_number[3]
print "\n Logical log unique identifier -> " + Log_unid[4]
print "\n Logical log position at Ckpt -> " + Log_pos[5]

##
## DBspace Usage Report: rootdbs Owner: informix Created: 10/11/2002
## Chunk Pathname Size Used Free
## 1 C:\informix\chunks\rootchk 12800 5607 7193
## Description Offset Size
## ------------------------------------------------------------- -------- --------
## .......................
## LOGICAL LOG: Log file 5 763 500
## .......................
d_pe = 'C:\\informix\\support\\oncheck_pe.txt'
f_pe = open( d_pe, 'rb' )
str = f_pe.readline()

while str:
str = str[:-2]
if ( string.find( str, "DBspace Usage" ) != -1 ) :
DBspace = [];
DBspace = string.split( str )
if ( string.find( str, "Chunk Pathname" ) != -1 ) :
str = f_pe.readline()
str = str[:-2]
Chunk = [];
Chunk = string.split( str )
if ( string.find( str, "LOGICAL LOG:" ) != -1 ) :
Logs = [];
Logs = string.split( str )
if Logs[4] != Log_number[3] :
str = f_pe.readline()
continue
if Logs[4] == Log_number[3] :
break
str = f_pe.readline()
f_pe.close()

print "\n DBspace Usage ............... -> " + DBspace[3]
print "\n Chunk Pathname .............. -> " + Chunk[1]
print "\n Logical Log number .......... -> " + Logs[4]
print "\n Logical Log Offset (Pages) .. -> " + Logs[5]

## Size page for Unix -> 2k = 2 * 1024
## for Win -> 4k = 4 * 1024
##

Offset_decimal_win = 4 * 1024 * string.atoi( Logs[5] ) + string.atoi( Log_pos[5][2:],16 )
print "\n Chunk offset CKPOINT: \n Decimal -> %i \n Hex -> %X" %(Offset_decimal_win, Offset_decimal_win)

##
## addr len type xid id link
## 8018 32 CKPOINT 1 155 0 0
## 20000000 9b004200 10000000 01000000 .....B. ........
## 00000000 42bb1600 00000000 00000000 ....B... ........

## addr len type xid id link
## f018 56 CKPOINT 1 155 0 1
## begin xid id addr user
## 155 7 155 d070 unknown
## 38000000 9b004200 10000000 01000000 8.....B. ........
## 00000000 dbbb1600 00000000 01000000 ........ ........
## 9b000000 9b000000 70d00000 07000000 ........ p.......
## 01000000 03440800 .....D..

## len: 32 --> 20000000
## 9b004200 --> 9b = id 155
## 004200 = CKPOINT
##

## C:\informix>onlog -n 158 -l | find "CKPOINT"
## addr len type xid id link
## 18 32 CKPOINT 0 155 0 0
## 2018 56 CKPOINT 1 158 0 1
## 3018 56 CKPOINT 1 158 0 1

## Records=[];

offset = Offset_decimal_win
f = open( Chunk[1], 'rb+' )
f.seek( offset, 0 )
ch = binascii.a2b_hex( '20' )
## f.write( ch )
ch = binascii.a2b_hex( '9b')
offset = Offset_decimal_win
f.seek( offset+4, 0 )
## f.write( ch )
ch = binascii.a2b_hex( '00' )
offset = Offset_decimal_win
f.seek( offset+28, 0 )
## f.write( ch )

## f.seek( offset, 0 )
## f.write( ch )
## for i in range (32,64) :
## f.seek( i, 1 )
## f.write( ch )

## print f.tell()
## Records = f.read( 32 )
##
## print f.tell()
##
## for i in range(0,31):
## print binascii.b2a_hex(Records[i])
##

f.close()
exit
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С уважением,
Вадим.