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Shell Programming and Scripting
Replace special characters in multiple files - perl
Post 302343383 by RMSoares on Wednesday 12th of August 2009 10:01:39 AM
08-12-2009
Replace special characters in multiple files - perl
I have 100 files, where i want to search a set of strings and make the replacement by other strings
In the first case I want to include a parameter in the name of a file
LOG_DCT = $ LOG_DIR/DCT_GERAL_"$DATAINI".log
replace to : LOG_DCT = $ LOG_DIR / DCT_GERAL_ $ 1_ "$ DATAINI". log
I did tests with the instruction "perl -pi -e 's/DCT_GERAL/DCT_GERAL_ $ 1 /' filename”, but the result is not what we expected: LOG_DCT = $ LOG_DIR / DCT_GERAL__" $ DATAINI”.log replaces the $ 1 by null.
In the second case, I want to move the instruction of new line to the end of a printf
printf "\n# $IDCADEIA - $IDJOB - $HORAACTUAL - XPTO(YYYYMMDD)">> $ LOGFILE
Replace to: printf "$IDCADEIA - $IDJOB - $HORAACTUAL - XPTO(YYYYMMDD) \n#">> $ LOGFILE
I tried using the command "perl -pi -e 's/printf "\n#/printf "/' filename” and "perl -pi -e' s/) ">> $ LOGFILE /) \n#"> > $ LOGFILE/' filename”, but since the string has special characters ( ), \ ", #) it gives an error in the replacement.
Accepted suggestions of how to make these changes to files without having to have them manually:
regards
Rui
In the first case I want to include a parameter in the name of a file
LOG_DCT = $ LOG_DIR/DCT_GERAL_"$DATAINI".log
replace to : LOG_DCT = $ LOG_DIR / DCT_GERAL_ $ 1_ "$ DATAINI". log
I did tests with the instruction "perl -pi -e 's/DCT_GERAL/DCT_GERAL_ $ 1 /' filename”, but the result is not what we expected: LOG_DCT = $ LOG_DIR / DCT_GERAL__" $ DATAINI”.log replaces the $ 1 by null.
In the second case, I want to move the instruction of new line to the end of a printf
printf "\n# $IDCADEIA - $IDJOB - $HORAACTUAL - XPTO(YYYYMMDD)">> $ LOGFILE
Replace to: printf "$IDCADEIA - $IDJOB - $HORAACTUAL - XPTO(YYYYMMDD) \n#">> $ LOGFILE
I tried using the command "perl -pi -e 's/printf "\n#/printf "/' filename” and "perl -pi -e' s/) ">> $ LOGFILE /) \n#"> > $ LOGFILE/' filename”, but since the string has special characters ( ), \ ", #) it gives an error in the replacement.
Accepted suggestions of how to make these changes to files without having to have them manually:
regards
Rui
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Strings looks for ASCII strings in a binary file or standard input. Strings is useful for identifying random object files and many other things. A string is any sequence of 4 (the default) or more printing characters ending with a newline or a null. Unless the - flag is given, strings looks in all sections of the object files except the (__TEXT,__text) section. If no files are specified standard input is read. The file arguments may be of the form libx.a(foo.o), to request information about only that object file and not the entire library. (Typ- ically this argument must be quoted, ``libx.a(foo.o)'', to get it past the shell.) The options to strings(1) are: -a This option causes strings to look for strings in all sections of the object file (including the (__TEXT,__text) section. - This option causes strings to look for strings in all bytes of the files (the default for non-object files). -- This option causes strings to treat all the following arguments as files. -o Preceded each string by its offset in the file (in decimal). -t format Write each string preceded by its byte offset from the start of the file. The format shall be dependent on the single character used as the format option-argument: d The offset shall be written in decimal. o The offset shall be written in octal. x The offset shall be written in hexadecimal. -number The decimal number is used as the minimum string length rather than the default of 4. -n number Specify the minimum string length, where the number argument is a positive decimal integer. The default shall be 4. -arch arch_type Specifies the architecture, arch_type, of the file for strings(1) to operate on when the file is a universal file. (See arch(3) for the currently know arch_types.) The arch_type can be "all" to operate on all architectures in the file, which is the default. SEE ALSO
od(1) BUGS
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