Visit Our UNIX and Linux User Community


Why is it always false?


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Why is it always false?
# 1  
Old 05-02-2008
Question Why is it always false?

Hi,
I'm new to UNIX and am trying to learn shell scripting in order to work on an interface that I inherited when a co-worker left. I need to be able to check to see whether a file exists to determine whether the FTP has taken place, but in testing, the if statement always evaluates as false, whether the file is there or not. Could someone tell me what I'm doing wrong?

Thanks.

filechk="/home/inform/LeanLogistic/CX_ORDER_LOAD_SHIPMENTexport.csv"
if [ -e "$filechk" ]
do some stuff
else
do something else
fi
# 2  
Old 05-02-2008
Code:
filechk="/home/inform/LeanLogistic/CX_ORDER_LOAD_SHIPMENTexport.csv"

if [ -e "$filechk" ]; then 
   do some stuff
else
   do something else
fi

# 3  
Old 05-02-2008
Question Thank you, Thank you, Thank you!

I had the 'then', just forgot to put it in the pseudo-code, but the semi-colon was the key. Thanks so much! I've wrestled with this for days.

Is the semi-colon always needed in an if statement? I've been reading O'Reilly's Classic Shell Scripting and it doesn't mention the semi-colon at all. What gives?
# 4  
Old 05-02-2008
either one of these is valid - it's a matter of the coding style:
Code:
if [ -e "$filechk" ]; then

OR
Code:
if [ -e "$filechk" ]
then


Last edited by vgersh99; 05-02-2008 at 04:12 PM.. Reason: stutterin'

Previous Thread | Next Thread
Test Your Knowledge in Computers #483
Difficulty: Easy
IDEs do not provide automated compile/build features and other tools that make the software development process easier and faster.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

False alerts

Hi I have written a script to send email alerts when load of my linux server reaches max point I keep getting false emails thought the load is normal , looks like same email is generated again and again - called from cron tab checked if the tempfile is present , no it is not , cleaned... (22 Replies)
Discussion started by: anil529
22 Replies

2. Shell Programming and Scripting

If echo statement return false

I have this code that sometimes return a false value and the code inside the if statement gets executed and error out. Any idea why? thanks. So I set a debug and see what the value for $ScriptElapsedTime Here is the value I got ScriptElapsedTime='03:20'. Base on this value the if... (10 Replies)
Discussion started by: nugent
10 Replies

3. AIX

Gid=0 and 7 + admin=FALSE

Checking configuration access files for an AIX server, left me wondering about this :confused:: If a user is added to system group, it gets gid=0 with some security risks because it gets some root kind of file access level. Is this insecure condition kept if the user has admin variable... (0 Replies)
Discussion started by: bkiddo
0 Replies

4. IP Networking

false tcp connection

Why this happens? How to solve this? $netstat -na |grep 9325 tcp 0 0 127.0.0.1:9325 127.0.0.1:9325 ESTABLISHED When a client socket repeatedly tries to connect to an inactive(no server socket is listening on this port) local port,connect succeeds. ... (1 Reply)
Discussion started by: johnbach
1 Replies

5. Shell Programming and Scripting

False Condition

Hi All, I am using the below Script to enter a line in the File: #!/bin/ksh # To delete the last line if it contains the pattern Redirect permanent / Virgin Atlantic Airways - Popup echo "Enter the URL that should point to the particular microsite" read url # To delete the last line if it... (0 Replies)
Discussion started by: Shazin
0 Replies

6. Shell Programming and Scripting

os.path.isdir is always returning false

Just started with learning python and tried something, most people here would call more than simple. I just wanted to list all directories within my main directory. So I user the following code: #!/usr/bin/env python import os if os.path.isdir("/home/testaccaunt/public_html"): ... (8 Replies)
Discussion started by: medic
8 Replies

7. Solaris

False Memory usage alarm!!

Hi Experts, I am using Solaris-10, Sun-Fire-V445. i got often the below message- "Memory Usage – Critical, Memory usage (RAM) exceeding 90% The memory utilization is exceeding 90%" in a application running on solaris. I checked with Vmstat. Everything seems to be fine. Where i should... (5 Replies)
Discussion started by: thepurple
5 Replies

8. UNIX for Advanced & Expert Users

will sftp work with /bin/false

helo helo I have create user for the group and entry for the user in /etc/passwd file is liek this bhavin:x:2014:109:test:/home/pds_RBAC:/bin/false I have keep here /bin/false now i m accesing user through sftp ow when i access that user using sftp from the another linux pc for e.g... (1 Reply)
Discussion started by: amitpansuria
1 Replies

9. Shell Programming and Scripting

false use of sed???

i want to delete every newline and every line which starts with "RECORD......." in a file. FILE: Record 61391 in base BROCKHAUS (Timestamp: 2008-04-09 11:38:38) UNTERTITEL : Gräfin (seit 1707 Reichsgräfin) von, * Schwerin 4. 2. 1686, + Berlin 21. 10. 1744; wurde Record 61392 in base BROCKHAUS... (4 Replies)
Discussion started by: trek
4 Replies

10. Linux

bin\false

We have requirments to not allow a userid login abilities but allow users to 'su' to it. In solaris I normally set the shell in /etc/passwd to bin/false. THis does not work on Linux, any suggestions would help. (1 Reply)
Discussion started by: bryanthomas
1 Replies

Featured Tech Videos