Hello
I need to search for a mult-line text in a file exfile1 and replace that text with another text. The text to search for is in exfile2 and the replacement text is in exfile3.
I work with kornshell under AIX and need to do this with a lot of files. (the file type is postscript and they need... (10 Replies)
Hello
I am looking to have a script that performs some tasks for find and replace and inserts a line as well. I have done some programming 10 years ago, so it is causing me a little grief.
File consists of 2500 records. I will show you a sample consisting of two records below and what needs... (3 Replies)
There appears to be several threads that touch on what I'm trying to do, but nothing quite generic enough.
What I need to do is search through many (poorly coded) HTML files and make changes. The catch is that my search string may be on one line or may be on several lines.
For example there... (5 Replies)
Hello
I need to search for a mult-line strngs(with spaces in between and qoted) in a file1 and replace that text with Fixed string globally in file1. The strng to search for is in file2.
The file is big with some 20K records. so speed and effciency is required
file1: (where srch & rplc... (0 Replies)
hi I am trying to use SED to replace the line matching a pattern using the command
sed 'pattern c\
new line
' <file1 >file 2
I got two questions
1. how do I insert a blank space at the beginning of new line?
2. how do I use this command to execute multiple command using the -e... (5 Replies)
Hi
I have no experience in Unix so any help would be appreciated
I have the flowing text
235543
123
45654
199
225
578
45654
199
225
I need to find this sequence from A file
45654
199
225 (22 Replies)
Literally cannot get this one, guys. Single line replacement is simple, but I am not understanding the correct syntax for including a new line feed into the substitution part.
Here's what I got. (Cannot use perl)
#!/bin/sh
set -f
#Start Perms
export HOME=/home/test_user
# End Perms... (6 Replies)
Dear Unix Forums,
I am hoping you can help me with a pattern matching problem.
What am I trying to do?
I want to replace multiple lines of a text file (that match a multi-line pattern) with a single line of text. These patterns can span several lines and do not always have the same number of... (10 Replies)
I have text file like below:
a.txt
Server=abc
Run=1
Time=120.123
Tables=10
Sessions=16
Time=380.123
Version=1.1
Jobs=5
Server=abc
Run=2
Time=160.123
Tables=15
Sessions=16
Time=400.258
Version=2.0 (1 Reply)
Discussion started by: sol_nov
1 Replies
LEARN ABOUT OPENDARWIN
upvar
upvar(n) Tcl Built-In Commands upvar(n)
__________________________________________________________________________________________________________________________________________________NAME
upvar - Create link to variable in a different stack frame
SYNOPSIS
upvar ?level? otherVar myVar ?otherVar myVar ...?
_________________________________________________________________DESCRIPTION
This command arranges for one or more local variables in the current procedure to refer to variables in an enclosing procedure call or to
global variables. Level may have any of the forms permitted for the uplevel command, and may be omitted if the first letter of the first
otherVar isn't # or a digit (it defaults to 1). For each otherVar argument, upvar makes the variable by that name in the procedure frame
given by level (or at global level, if level is #0) accessible in the current procedure by the name given in the corresponding myVar argu-
ment. The variable named by otherVar need not exist at the time of the call; it will be created the first time myVar is referenced, just
like an ordinary variable. There must not exist a variable by the name myVar at the time upvar is invoked. MyVar is always treated as the
name of a variable, not an array element. Even if the name looks like an array element, such as a(b), a regular variable is created. Oth-
erVar may refer to a scalar variable, an array, or an array element. Upvar returns an empty string.
The upvar command simplifies the implementation of call-by-name procedure calling and also makes it easier to build new control constructs
as Tcl procedures. For example, consider the following procedure:
proc add2 name {
upvar $name x
set x [expr $x+2]
}
Add2 is invoked with an argument giving the name of a variable, and it adds two to the value of that variable. Although add2 could have
been implemented using uplevel instead of upvar, upvar makes it simpler for add2 to access the variable in the caller's procedure frame.
namespace eval is another way (besides procedure calls) that the Tcl naming context can change. It adds a call frame to the stack to rep-
resent the namespace context. This means each namespace eval command counts as another call level for uplevel and upvar commands. For
example, info level 1 will return a list describing a command that is either the outermost procedure call or the outermost namespace eval
command. Also, uplevel #0 evaluates a script at top-level in the outermost namespace (the global namespace).
If an upvar variable is unset (e.g. x in add2 above), the unset operation affects the variable it is linked to, not the upvar variable. |
There is no way to unset an upvar variable except by exiting the procedure in which it is defined. However, it is possible to retarget an |
upvar variable by executing another upvar command. |
Traces and upvar |
Upvar interacts with traces in a straightforward but possibly unexpected manner. If a variable trace is defined on otherVar, that trace |
will be triggered by actions involving myVar. However, the trace procedure will be passed the name of myVar, rather than the name of oth- |
erVar. Thus, the output of the following code will be localVar rather than originalVar: |
proc traceproc { name index op } { |
puts $name |
} |
proc setByUpvar { name value } { |
upvar $name localVar |
set localVar $value |
} |
set originalVar 1 |
trace variable originalVar w traceproc |
setByUpvar originalVar 2 |
} |
If otherVar refers to an element of an array, then variable traces set for the entire array will not be invoked when myVar is accessed (but |
traces on the particular element will still be invoked). In particular, if the array is env, then changes made to myVar will not be passed |
to subprocesses correctly.
SEE ALSO
global(n), namespace(n), uplevel(n), variable(n)
KEYWORDS
context, frame, global, level, namespace, procedure, variable
Tcl upvar(n)