Checking and replacing first line in text file, one-liner?
Hello,
I'm looking to check only the first line of a file to see if it is a format string, like
if the first line is anything else, insert the above string.
I'd appreciate a one liner as I'm putting this command inside of a
so far I'm hacking awk that looks like
which correctly detects if the format string is there or not but can't seem to figure out how to get awk to redirect the pipe to insert the format string?
I must remove hex characters 0A and 0D from several fields within an MS Access Table. Since I don't think it can be done in Access, I am trying here.
I am exporting a Table from Access (must be fixed length fields, I think, for my idea to work here) into a text format.
I then want to run a... (2 Replies)
Hello,
I have the following report (report.txt) file (see attached).
I would like to check the file and if the field is error, then showing error message at output.
1. In the report, 1st, 2st and 3nd line can be ignore to check
2. start to check line 4 (each field use "," to split
- 1st... (1 Reply)
Hi
I need a perl onliner to delete a line in a file starting with few words.
Example
file.txt
----------
my name is don
I live in London
I am woking as engineer
I want to delete a line starting with 'I live in' using perl oneliner and in place edit with out temporary files
Thanks... (2 Replies)
can someone help me translate the following command, from:
/usr/bin/awk "/^$TOFDAYM $TOFDAYD /,0" $LOGFILE
to something like
perl -e .....
basically, i want to use perl to do awk functions within a shell script. i want to do the above awk, using perl.
any suggestions? (9 Replies)
I have file like this
"copy table_name from filea.txt on node replace delimiter '|';"
"copy table_name from fileb.txt on node replace delimiter '|';"
"copy table_name from filec.txt on node replace delimiter'|';"
"copy table_name from filee.txt on node replace delimiter '|';"
"copy... (1 Reply)
Hi
I need to write a Perl script that the file given as first argument of the command line that will find all occurrences of the string given as the third argument of the command line and replace with the string given as the fourth argument. Name newfound file is specified as the second... (3 Replies)
Is it possible to replace a line of text within a file while it's closed with a single command or a script? Please show me an example or point me to a webpage that shows an example. The file has this line of text:
LoginGraceTime 100
I want to replace it with the following:
... (2 Replies)
Hi,
I've got this output:
# cat test2.txt
TM1ITP1-TMNLSTP1 SLC00=0,SLC01=0,SLC02=0,SLC03=0
if I just use cat test2.txt | tr "," "\n" I'll end up very near to what I'm trying to achieve:
TM1ITP1-TMNLSTP1 SLC00=0
SLC01=0
SLC02=0
SLC03=0
But how can i eventually add the term... (1 Reply)
Hi
I want to replace time stamp in the following line
PROCNAME.Merge.exchMon.CODE.T_QSTART 08:45 read
assuming the new time stamp is 09:45 ; the line is getting replaced as below
:45 read
I'm trying to use the perl one liner in bash script
perl -pi... (4 Replies)
Discussion started by: charlie87
4 Replies
LEARN ABOUT OPENSOLARIS
fspec
fspec(4) File Formats fspec(4)NAME
fspec - format specification in text files
DESCRIPTION
It is sometimes convenient to maintain text files on the system with non-standard tabs, (tabs that are not set at every eighth column).
Such files must generally be converted to a standard format, frequently by replacing all tabs with the appropriate number of spaces, before
they can be processed by system commands. A format specification occurring in the first line of a text file specifies how tabs are to be
expanded in the remainder of the file.
A format specification consists of a sequence of parameters separated by blanks and surrounded by the brackets <: and :>. Each parameter
consists of a keyletter, possibly followed immediately by a value. The following parameters are recognized:
ttabs The t parameter specifies the tab settings for the file. The value of tabs must be one of the following:
o A list of column numbers separated by commas, indicating tabs set at the specified columns.
o A '-' followed immediately by an integer n, indicating tabs at intervals of n columns.
o A '-' followed by the name of a ``canned'' tab specification.
Standard tabs are specified by t-8, or equivalently, t1,9,17,25, etc. The canned tabs that are recognized are defined by the
tabs(1) command.
ssize The s parameter specifies a maximum line size. The value of size must be an integer. Size checking is performed after tabs have
been expanded, but before the margin is prepended.
mmargin The m parameter specifies a number of spaces to be prepended to each line. The value of margin must be an integer.
d The d parameter takes no value. Its presence indicates that the line containing the format specification is to be deleted from
the converted file.
e The e parameter takes no value. Its presence indicates that the current format is to prevail only until another format specifi-
cation is encountered in the file.
Default values, which are assumed for parameters not supplied, are t-8 and m0. If the s parameter is not specified, no size checking is
performed. If the first line of a file does not contain a format specification, the above defaults are assumed for the entire file. The
following is an example of a line containing a format specification:
* <:t5,10,15 s72:> *
If a format specification can be disguised as a comment, it is not necessary to code the d parameter.
SEE ALSO ed(1), newform(1), tabs(1)SunOS 5.11 3 Jul 1990 fspec(4)