Sponsored Content
Full Discussion: Checking if a file exists
Top Forums Shell Programming and Scripting Checking if a file exists Post 302217727 by krishmaths on Wednesday 23rd of July 2008 11:39:01 AM
Old 07-23-2008
@gugs:

there is no need for an if condition. You may directly use >> as it will append if file exists, or will create file if it does not exist.

Code:
echo "some text" >> testfile

 

10 More Discussions You Might Find Interesting

1. IP Networking

checking a connection still exists?

Hi I have a bit of c code which I'm trying to use as a relay between apache and a scgi cluster. Example of problem code is below: while((n = recv(scgiSock, local_data, MAX_LENGTH, 0)) > 0) { time(&t2); time_now = t2 - t1; if(time_now > TIMEOUT) ... (2 Replies)
Discussion started by: fishman2001
2 Replies

2. Shell Programming and Scripting

Checking the file if it exists

Hi This will be useful who is looking for checking the files in a directory #chmod 777 /cronacle/tools/teradata/opo/bin/file_check.sh SUBJECT=`echo "File Not Found"` SUBJECT1=`echo "File Found"` #RECIPIENT=Madhu.Reddy@ge.com cd /cronacle/tools/teradata/opo/bin file_list=attach.sh if ... (3 Replies)
Discussion started by: ksmbabu
3 Replies

3. Shell Programming and Scripting

checking textfile exists or not in all directories

Hai All, please help me in solving this assignment!!! i need a unix script that has to check the text file exists or not in all directories and sub directories if textfile exists display the directory path else display does not exists!! example: kamal.txt that i want to search if the... (5 Replies)
Discussion started by: G.K.K
5 Replies

4. Shell Programming and Scripting

Checking if file exists using a NOT operator and shell variable

Hi, I'm new to UNIX, at least shell programming and am having trouble figuring out a problem i'm having. In one section in my nested if statement, i want the program to test if the file does not exist, based on an argument supplied at the command line by the user. What i have is elif ; then... (3 Replies)
Discussion started by: rowlf
3 Replies

5. Shell Programming and Scripting

Checking if file exists

How can I check if a file exists in csh? I know there is "-e $file" but do not know exactly how to use it. I have tried the below but I'm getting "Bad : modifier in $ ( )." foreach f ($AfullnameLst) if (-e $f) then echo "$f: file exists" endif end (6 Replies)
Discussion started by: kristinu
6 Replies

6. Shell Programming and Scripting

what is the difference between -f and -e, when checking for file exists

Hi All, what is the difference between -f and -e. Regards, ch33ry (1 Reply)
Discussion started by: ch33ry
1 Replies

7. Shell Programming and Scripting

Checking whether the file exists under a directory and doing a diff

Hi Everyone, I am writing a shell script for the below needs and would like your suggestions and advices. I have a lot of scripting files(Shell Scripts) under the directory: /home/risk_dev/dev I have another directory which has a lot of shell scripts under the directory: ... (2 Replies)
Discussion started by: filter
2 Replies

8. Shell Programming and Scripting

Checking if file exists and unzipping

Hey, I am new to scripting and was wondering what is wrong with this if statement. I want to check if file exists and the if it does to unzip it. I program it as follows if ; then gunzip *_filename.gz fi Thanks in advance! Please use code tags next time for your code and data. (10 Replies)
Discussion started by: mostarac2487
10 Replies

9. Shell Programming and Scripting

Problem with ssh and checking if file exists

Hi All, I am facing a problem while checking for existence of file over ssh ! Basically, i want to ssh and check if file exists.. If file exists return 1. If file does not exits return 0 (or any value) I am using the below code file_avail=`ssh username@host "if ]; then exit 1;... (10 Replies)
Discussion started by: galaxy_rocky
10 Replies

10. Shell Programming and Scripting

For loop without checking file exists

In several scripts that process files matched by name pattern I needed to add a check for file existence. Just to illustrate let's say I need to process all N??? files: /tmp$ touch N100 N101 /tmp$ l ?10 -rw-rw-r-- 1 moss group 0 Apr 19 11:22 N100 -rw-rw-r-- 1 moss group ... (10 Replies)
Discussion started by: migurus
10 Replies
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
All times are GMT -4. The time now is 09:55 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy