06-15-2011
10 More Discussions You Might Find Interesting
1. Programming
in
fprint(stderr, "lkjalsdi\n");
what does stderr mean?
thanks (1 Reply)
Discussion started by: dell9
1 Replies
2. UNIX for Dummies Questions & Answers
Does anyone know away of redirecting the stderr for a bourne or korn shell script to a file. (5 Replies)
Discussion started by: blakmk
5 Replies
3. Shell Programming and Scripting
Hi,
Need some help here on a script I'm writing. I know that STDERR is normally done is this manner:
script 2>stderr.out
However, if I wanted to output the stderr from a rsh command how do I do that?
Example:
su - username -c "rsh $hostname /opt/gilberteu/scriptname" 1>stdout... (5 Replies)
Discussion started by: gilberteu
5 Replies
4. BSD
Hello!
Firts of all, sorry fo my poor english, but i hope you'll undestand me :)
Ok, let's go to the problem....
I have a lot of awstats crontabs, and i have one mail,where i get daily and weekly output of all servers that i administrate, now it's problem that i get to his mail every time,... (3 Replies)
Discussion started by: flashm3
3 Replies
5. Shell Programming and Scripting
% ls -ld /usr /foo
ls: /foo: No such file or directory
drwxr-xr-x 14 root wheel 512 May 18 02:49 /usr
% ls -ld /usr /foo 1>/dev/null/
/dev/null/: Not a directory.
% ls -ld /usr /foo 2>/dev/null/
/dev/null/: Not a directory.
^^Why why why doesn't this work for me. Furthermore, where is... (7 Replies)
Discussion started by: phpfreak
7 Replies
6. Shell Programming and Scripting
Hi everybody.
I was used to redirect stderr to a file in this way, calling a generic script:./myScript &> output.logBut now I need something more sophisticated...Inside a bash script I launch an executable in this way:${command} >> "${globalLogFile}"So I redirect the stdout into globalLogFile.... (14 Replies)
Discussion started by: canduc17
14 Replies
7. Shell Programming and Scripting
Can somebody explain to me why the diff output is not going to stderr?
Yet when I issue a diff from the command line the return code is -ne 1.
I am guessing diff always writes to stdout???
Is there away I can force the difff to write to stderr USING THE CURRENT
template. If possible, I... (5 Replies)
Discussion started by: BeefStu
5 Replies
8. Shell Programming and Scripting
Hello everyone,
I'm a nooby in Linux, and I need some help.
I have a shell script like this:
echo "Start of script" > ../My_Log_Dir/Script_Name.log
..
cp ../My_DataIn/File.txt ../My_DataOut/ 2>> ../My_Log_Dir/Script_Name.log
rc=$?
..
echo "End of Script" >>... (5 Replies)
Discussion started by: H.Faria
5 Replies
9. Solaris
Hi Experts,
i have a solaris 9 OS and i get the following message repeated many time in my /var/adm/messages :
Oct 31 16:30:44 baobab rsh: can't get stderr port: Cannot assign requested address
have you any idea how can i resolve this issue ??:confused:
thanks for help (2 Replies)
Discussion started by: lid-j-one
2 Replies
10. Shell Programming and Scripting
Hi All,
I am writing a shell script code. and i want the stderr to be send to a file and the stdout to be displayed in terminal. In my shell script code i use a read command to get data from user.read -r -p "Enter the type :" data
and while i execute my script i use./my_script.sh 2>... (4 Replies)
Discussion started by: Vinoth R
4 Replies
eval(n) Tcl Built-In Commands eval(n)
__________________________________________________________________________________________________________________________________________________
NAME
eval - Evaluate a Tcl script
SYNOPSIS
eval arg ?arg ...?
_________________________________________________________________
DESCRIPTION
Eval takes one or more arguments, which together comprise a Tcl script containing one or more commands. Eval concatenates all its argu-
ments in the same fashion as the concat command, passes the concatenated string to the Tcl interpreter recursively, and returns the result
of that evaluation (or any error generated by it). Note that the list command quotes sequences of words in such a way that they are not
further expanded by the eval command.
EXAMPLES
Often, it is useful to store a fragment of a script in a variable and execute it later on with extra values appended. This technique is
used in a number of places throughout the Tcl core (e.g. in fcopy, lsort and trace command callbacks). This example shows how to do this
using core Tcl commands:
set script {
puts "logging now"
lappend $myCurrentLogVar
}
set myCurrentLogVar log1
# Set up a switch of logging variable part way through!
after 20000 set myCurrentLogVar log2
for {set i 0} {$i<10} {incr i} {
# Introduce a random delay
after [expr {int(5000 * rand())}]
update ;# Check for the asynch log switch
eval $script $i [clock clicks]
}
Note that in the most common case (where the script fragment is actually just a list of words forming a command prefix), it is better to |
use {*}$script when doing this sort of invocation pattern. It is less general than the eval command, and hence easier to make robust in |
practice. The following procedure acts in a way that is analogous to the lappend command, except it inserts the argument values at the
start of the list in the variable:
proc lprepend {varName args} {
upvar 1 $varName var
# Ensure that the variable exists and contains a list
lappend var
# Now we insert all the arguments in one go
set var [eval [list linsert $var 0] $args]
}
However, the last line would now normally be written without eval, like this: |
set var [linsert $var 0 {*}$args] |
SEE ALSO
catch(n), concat(n), error(n), interp(n), list(n), namespace(n), subst(n), tclvars(n), uplevel(n)
KEYWORDS
concatenate, evaluate, script
Tcl eval(n)