Thanks, works a treat. I couldn't understand how it worked until I tried this on the command line:
and got the filenames of my three test files:
status-1 status-2 status-3
So echo can work a little like ls? I have learnt something today.
Hi,
My requirement was to check the existence of a file having a specified pattern.The way i tried to achieve this was
if ; then
echo "File found"
fi
an example file having this pattern was 'ilvs_trace01.0124'.
it will vary... (3 Replies)
Hi,
I am trying to check for the existence of a file using the 'test' and the file existence options.
When trying to check for a file with a space in between e.g 'Team List', it gives the following error.
learn1: line 3: test: `Team: binary operator expected
I am pasting my code below as... (7 Replies)
Hi All,
I have a requirement where in i need to check for existence of a file and later execute some pmcmd commands related to informatica. I tried many ways but was unsuccessful could you please throw some light. Below are the sample codes i wrote.
Example 1:
#!/bin/ksh... (4 Replies)
Hi
Can any body say me the reason for below error
ssh -o 'StrictHostKeyChecking no' user@client ' && print "1"'
I am getting error as "Missing ]":wall: (6 Replies)
Hi,
I am looking for a shell script with the following.
1. It should check whether a particular file exists in a location
#!/bin/sh
if ;
then
echo "xxx.txt File Exists"
else
echo "File Not Found"
fi
2. If file exists, it should check for the modified date and run a command... (2 Replies)
Hi,
I need to check whether a particular file exists ot not using awk.
Can anyone help me please?
For Example:script that i am using:
awk '{filename =$NF;
rc=(system("test -r filename")) print $rc;}' "$1"
is not working.
Here I am passing a text file as input whose last word contains a... (6 Replies)
Hi am trying to write a script which find the existence of a file from a find command output and perform a task if the file exists. Help me out with the correct syntax . Am trying with the following one but unable to get the output.
if
then <some tasks>
else
echo "file not exists"
fi (5 Replies)
Hi,
I have written a script to validate the data file by referreing to the configurtion file. And moving the validated good records and bad records into HDFS.
Suppose after 15 mins if i receive one more data fie,then after validation the good and bad records shold be stored in hadoop with the... (8 Replies)
Hello,
I have a directory where sometimes appear a certain file name - and I'd like to be notified by email when that happens... so what command or script I may use?
e.g. if there's a file named "adam" in the directory named "dir1" then send a mail to "abc@abc.com".. it needs to permanently... (5 Replies)
Discussion started by: netrom
5 Replies
LEARN ABOUT PLAN9
test
TEST(1) General Commands Manual TEST(1)NAME
test - set status according to condition
SYNOPSIS
test expr
DESCRIPTION
Test evaluates the expression expr. If the value is true the exit status is null; otherwise the exit status is non-null. If there are no
arguments the exit status is non-null.
The following primitives are used to construct expr.
-r file True if the file exists (is accessible) and is readable.
-w file True if the file exists and is writable.
-x file True if the file exists and has execute permission.
-e file True if the file exists.
-f file True if the file exists and is a plain file.
-d file True if the file exists and is a directory.
-s file True if the file exists and has a size greater than zero.
-t fildes True if the open file whose file descriptor number is fildes (1 by default) is the same file as /dev/cons.
s1 = s2 True if the strings s1 and s2 are identical.
s1 != s2 True if the strings s1 and s2 are not identical.
s1 True if s1 is not the null string. (Deprecated.)
-n s1 True if the length of string s1 is non-zero.
-z s1 True if the length of string s1 is zero.
n1 -eq n2 True if the integers n1 and n2 are arithmetically equal. Any of the comparisons -ne, -gt, -ge, -lt, or -le may be used in place
of -eq. The (nonstandard) construct -l string, meaning the length of string, may be used in place of an integer.
These primaries may be combined with the following operators:
! unary negation operator
-o binary or operator
-a binary and operator; higher precedence than -o
( expr ) parentheses for grouping.
The primitives -b, -u, -g, and -s return false; they are recognized for compatibility with POSIX.
Notice that all the operators and flags are separate arguments to test. Notice also that parentheses and equal signs are meaningful to rc
and must be enclosed in quotes.
EXAMPLES
Test is a dubious way to check for specific character strings: it uses a process to do what an rc(1) match or switch statement can do. The
first example is not only inefficient but wrong, because test understands the purported string "-c" as an option.
if (test $1 '=' "-c") echo OK # wrong!
A better way is
if (~ $1 -c) echo OK
Test whether is in the current directory.
test -f abc -o -d abc
SOURCE
/sys/src/cmd/test.c
SEE ALSO rc(1)TEST(1)