I have the following code
Simply I need to check if $SDFFILE_SRC isa newer than $SDFFILE_DST or $SDFFILE_DST does not exist then execute the IF Body.
Although the the condition is not true, the IF body is executed.
Is there a problem with using file test commands with variable file names ?
Thanks,
Last edited by Franklin52; 10-08-2014 at 11:41 AM..
Reason: Please use regular code tags for multiple lines
ok im doing this in a normal shell. i need to check the file in the script. how should i write the if else statment?
if the filesize contains 0kb then it will echo out file contains nothing
else if the script contains more than 0kb then it will echo out file exist.
any one care to help?... (3 Replies)
Hi All
I have written the following script:
#!/bin/ksh
while read cmdline
do
echo `$cmdline`
pid="$cmdline"
done<commands.txt
===========
commands.txt contains:
ps -ef | grep abc | grep xyz |awk '{print $2};
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my script is setting a variable with value and this variable is present in my another command that is coming from external file and this command is internally called after this variable is set. but while execution of this command, the value is not retrieved properly.
say,
my script... (5 Replies)
Hi.
I'm new here, and I'm trying to enter this big world of unix.
I would like to know how can I install a SSH server for free so I can teste some things, like make a file, change files, rename and things like this?
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I would like to ask if someone know how to test a files if exist the file is a nfs mount ufsdump archive file..
i used the test operator -f -a h almost all test operator but i failed
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I have a problem where i have to hit multiple URL that are stored in a text file (input.txt) and save their output in different text file (output.txt) somewhat like :
cat input.txt
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Hi I want to read a text file and replace various number of spaces between each string in to a single "," or any other character .Please let me know the command to do so. My input file is a txt file which is the output of a SQL table extract so it contains so many spaces between each column of the... (2 Replies)
Discussion started by: Hari Prasanth
2 Replies
LEARN ABOUT REDHAT
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)