That tests if the standard input (FD # 0) is a terminal.
If it is a terminal then a prompt can be printed if it is a pipe then no prompt is necessary. The prompt should probably be printed to stderr so that if you redirect to a file it is still visible:
I am trying to check to see if a file exists on a ftp server, well, I know that cant be done, atleast directly, So I came up with this small script
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
cd public_html/crap
dir $FILE
quit
END_SCRIPT
Where the $ variable... (2 Replies)
Hi List,
How to read the output of a command executed from a script.
For ex.
sample_scritp.sh
-------------
useradd testuser1
password testuser1
....
.....
--------------
This prompts for "password", and "confirm password", for which i need to give the values from script.
Can... (4 Replies)
i want to redirect output of one command as the command line argument of another script
for example, say i would run this command:
find . -xdev -type f -size +4096 -exec ls -al {} \;
i wan to be able to do something like:
echo +4096 | find . -xdev -type f -size ****** -exec... (3 Replies)
Hi ,
I would like to assign command (with pipe) output to a variable. The code is as follows. The goal of the code is to get the last folder folder with a particular name pattern.
myDate=`ls | grep 2009 | tail -1`
echo "myDate=" $myDate
However, in the presence of the pipe, the code... (3 Replies)
Hi,
I am having a list of directories with different login id's. My requirement is that i need to list the directories of my id and need to delete them. So i am using following code
ls -ltr ¦ grep userid ¦ rm -rf
But this is not working. So is there any way of doing it. Please note... (3 Replies)
xargs work great when a command gives multiple line output which can be input to another. In my case it is not working coz the second command uses two words in it.
$ scr.sh
gives output like
193740
638102
375449
..
..
another command takes these number as inputs. it works great... (1 Reply)
Hi,
I am using below code snippet to echo/display the files found
(matching a pattern from searchstring.out file) and the corresponding owner.
while read j
do
echo "Pattern to search is:- $j"
find / -name "*$j*" |\
while read k
do
echo "File found is:- $k"
owner=$(ls... (9 Replies)
Since output of w command have variable number of columns I want to get the output in pipe delimited format. I tried
export OFS="|"; w
but that does not work.
Any ideas? (4 Replies)
Discussion started by: Soham
4 Replies
LEARN ABOUT FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO atf-sh(3)BSD September 27, 2014 BSD