This is perfect man, thank you...
Can you explain exactly whats going on here? I read some info on sed but to be honest Im not following. I'd love to learn so I can do this myself next time.
I'm trying to use sed to replace string in text file but I've some problems with slash and new-line
for example I have to replace this string:
\> signal_rssi="
or this string where new-line is in the middle of the string:
"
/>
I'm using this code for the first case but it doesn't... (10 Replies)
Hello
How do i check that correct input files are used while using AWk and SED for file manipulation?
e.g
awk '/bin/ {print $0 }' shell.txt
sed 's/hp/samsung/' printers.txt
how do i ensure that the correct input files I am working with are used? (5 Replies)
I have a text wich looks like this:
clid=2 cid=6 client_database_id=35 client_nickname=Peter client_type=0|clid=3 cid=22 client_database_id=57 client_nickname=Paul client_type=0|clid=5 cid=22 client_database_id=7 client_nickname=Mary client_type=0|clid=6 cid=22 client_database_id=6... (3 Replies)
I have large number of data files, close to 300 files, lets say all files are same kind and have extension .dat , each file have mulitple lines in it.
There is a unique line in each file containing string 'SERVER'. Right after this line there is another line which contain a string 'DIGIT=0',... (4 Replies)
EDIT: This has been SOLVED. Thanks!
Greetings everyone,
I've posted a few threads with some quick help questions, and this is another one of those. I can't post enough gratitude for those much more knowledgeable than myself who are willing to give good advice for my minor issues. Now,... (2 Replies)
Hi ! I'm working into my first bash script to make some xml modification and it's going to make me crazy lol .. so I decide to try into this forum to take some ideas from people that really know about this!
This is my situation I've and xml file with a lots of positional values with another tags... (9 Replies)
I don't know if this is a big issue or not, but I'm having difficulties. I apoligize for the upcoming essay :o.
I'm writing a script, similar to a paint program that edits images, but in the form of ANSI block characters. The program so far is working. I managed to save the image into a file,... (14 Replies)
Ok, so I have a bash script with an embedded expect statement.
Inside of the expect statement, i'm trying to pull all of the non-comment lines from the /etc/oratab file one at a time.
Here's my command:
cat /etc/oratab |sed /^s*#/d\ | awk 'NR==1'|awk -F: '{print \"$1\"}'|. oraenv
Now,... (0 Replies)
trying to write up a script to put the suffix back.
heres what I have but can't get it to do anything :(
would like it to be name.date.suffix
rsync -zrlpoDtub --suffix=".`date +%Y%m%d%k%M%S`.~" --bwlimit=1024 /mymounts/test1/ /mymounts/test2/
while IFS=. read -r -u 9 -d '' name... (1 Reply)
Hello everybody,
I have the following input file:
START ANALYSIS 1
DATA LINE
DATA LINE
DATA LINE
DATA LINE
Libray /home/me/myLibrary
Source library_name_AAAAA
DATA LINE
DATA LINE
DATA LINE
BEGIN SOURCE ANALYSIS
Function A
Function B
Function C
Function D (4 Replies)
Discussion started by: namnetes
4 Replies
LEARN ABOUT OPENDARWIN
subst
subst(n) Tcl Built-In Commands subst(n)
__________________________________________________________________________________________________________________________________________________NAME
subst - Perform backslash, command, and variable substitutions
SYNOPSIS
subst ?-nobackslashes? ?-nocommands? ?-novariables? string
_________________________________________________________________DESCRIPTION
This command performs variable substitutions, command substitutions, and backslash substitutions on its string argument and returns the
fully-substituted result. The substitutions are performed in exactly the same way as for Tcl commands. As a result, the string argument
is actually substituted twice, once by the Tcl parser in the usual fashion for Tcl commands, and again by the subst command.
If any of the -nobackslashes, -nocommands, or -novariables are specified, then the corresponding substitutions are not performed. For
example, if -nocommands is specified, command substitution is not performed: open and close brackets are treated as ordinary characters
with no special interpretation.
Note that the substitution of one kind can include substitution of other kinds. For example, even when the -novariables option is speci- |
fied, command substitution is performed without restriction. This means that any variable substitution necessary to complete the command |
substitution will still take place. Likewise, any command substitution necessary to complete a variable substitution will take place, even |
when -nocommands is specified. See the EXAMPLES below. |
If an error occurs during substitution, then subst will return that error. If a break exception occurs during command or variable substi- |
tution, the result of the whole substitution will be the string (as substituted) up to the start of the substitution that raised the excep- |
tion. If a continue exception occurs during the evaluation of a command or variable substitution, an empty string will be substituted for |
that entire command or variable substitution (as long as it is well-formed Tcl.) If a return exception occurs, or any other return code is |
returned during command or variable substitution, then the returned value is substituted for that substitution. See the EXAMPLES below. |
In this way, all exceptional return codes are ``caught'' by subst. The subst command itself will either return an error, or will complete |
successfully.
EXAMPLES
When it performs its substitutions, subst does not give any special treatment to double quotes or curly braces (except within command sub-
stitutions) so the script
set a 44
subst {xyz {$a}}
returns ``xyz {44}'', not ``xyz {$a}'' and the script |
set a "p} q {r" |
subst {xyz {$a}} |
return ``xyz {p} q {r}'', not ``xyz {p} q {r}''. |
When command substitution is performed, it includes any variable substitution necessary to evaluate the script. |
set a 44 |
subst -novariables {$a [format $a]} |
returns ``$a 44'', not ``$a $a''. Similarly, when variable substitution is performed, it includes any command substitution necessary to |
retrieve the value of the variable. |
proc b {} {return c} |
array set a {c c [b] tricky} |
subst -nocommands {[b] $a([b])} |
returns ``[b] c'', not ``[b] tricky''. |
The continue and break exceptions allow command substitutions to prevent substitution of the rest of the command substitution and the rest |
of string respectively, giving script authors more options when processing text using subst. For example, the script |
subst {abc,[break],def} |
returns ``abc,'', not ``abc,,def'' and the script |
subst {abc,[continue;expr 1+2],def} |
returns ``abc,,def'', not ``abc,3,def''. |
Other exceptional return codes substitute the returned value |
subst {abc,[return foo;expr 1+2],def} |
returns ``abc,foo,def'', not ``abc,3,def'' and |
subst {abc,[return -code 10 foo;expr 1+2],def} |
also returns ``abc,foo,def'', not ``abc,3,def''.
SEE ALSO
Tcl(n), eval(n), break(n), continue(n)
KEYWORDS
backslash substitution, command substitution, variable substitution
Tcl 7.4 subst(n)