Shell test conditions


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
# 1  
Shell test conditions

Are these shell test conditions in any man pages? I do not see them in bash or ksh man pages.

Code:
The tests below are test conditions provided by the shell: 

-b file = True if the file exists and is block special file. 
-c file = True if the file exists and is character special file. 
-d file = True if the file exists and is a directory. 
-e file = True if the file exists. 
-f file = True if the file exists and is a regular file 
-g file = True if the file exists and the set-group-id bit is set. 
-k file = True if the files' "sticky" bit is set. 
-L file = True if the file exists and is a symbolic link. 
-p file = True if the file exists and is a named pipe. 
-r file = True if the file exists and is readable. 
-s file = True if the file exists and its size is greater than zero. 
-s file = True if the file exists and is a socket. 
-t fd = True if the file descriptor is opened on a terminal. 
-u file = True if the file exists and its set-user-id bit is set. 
-w file = True if the file exists and is writable. 
-x file = True if the file exists and is executable. 
-O file = True if the file exists and is owned by the effective user id. 
-G file = True if the file exists and is owned by the effective group id. 
file1 –nt file2 = True if file1 is newer, by modification date, than file2. 
file1 ot file2 = True if file1 is older than file2. 
file1 ef file2 = True if file1 and file2 have the same device and inode numbers. 
-z string = True if the length of the string is 0. 
-n string = True if the length of the string is non-zero. 
string1 = string2 = True if the strings are equal. 
string1 != string2 = True if the strings are not equal. 
!expr = True if the expr evaluates to false. 
expr1 –a expr2 = True if both expr1 and expr2 are true. 
expr1 –o expr2 = True is either expr1 or expr2 is true.

I just found them with a lucky google search.

https://www.unix.com/302238280-post3.html
How to check if a file exists using the if statement
# 2  
No luck needed. Excerpt from man bash (Ubuntu linux 19.04):



Quote:
CONDITIONAL EXPRESSIONS
.
.
.
-a file
True if file exists.
-b file
True if file exists and is a block special file.
.
.
.
# 3  
I do not see it in AIX man pages.
# 4  
You can find it in man test.
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to use SQL Hard Code Conditions in UNIX Shell Script?

Hi All, I am trying to place one SQL query in Shell Script with Where Condition as Status='1' But after running the the script it is returning error as SQL0206N "1" is not valid in the context where it is used. SQLSTATE=42703 The query is working fine in Data Base. Please suggest... (1 Reply)
Discussion started by: sumanmca2006
1 Replies

2. UNIX for Dummies Questions & Answers

Shell script to extract data from csv file based on certain conditions

Hi Guys, I am new to shell script.I need your help to write a shell script. I need to write a shell script to extract data from a .csv file where columns are ',' separated. The file has 5 columns having values say column 1,column 2.....column 5 as below along with their valuesm.... (1 Reply)
Discussion started by: Vivekit82
1 Replies

3. Shell Programming and Scripting

Linux Shell: how to check a string whether meets some conditions

Hi, guys. In Linux Shell script, how can I check a string whether meets some conditions. e.g.: If a string str must start with a underscore or a alphabet, and it must contains at least one lowercase, one uppercase, one numeric and one punctuation, and its length must be more than 8 characters... (2 Replies)
Discussion started by: franksunnn
2 Replies

4. Shell Programming and Scripting

Shell script executing both the conditions.

I have written this script. This is used for creating a backup folder. #!/bin/sh #set -x . /home/.profile usage="Usage is $0" usage="$usage " # Use the getopt utility to set up the command line flags. set -- `/usr/bin/getopt b: $*` # Process individual command line arguments while ;... (1 Reply)
Discussion started by: arijitsaha
1 Replies

5. UNIX for Dummies Questions & Answers

multiple if conditions and EOF in a shell script

I want to create an IF condition with multiple condition, in the statement below I want to add OR EOF, can any one please advise how to do. if } != $sample ] && ; then echo ..... fi code tags please (1 Reply)
Discussion started by: analyst
1 Replies

6. Shell Programming and Scripting

How to check weather a string is like test* or test* ot *test* in if condition

How to check weather a string is like test* or test* ot *test* in if condition (5 Replies)
Discussion started by: johnjerome
5 Replies

7. Shell Programming and Scripting

Test on string containing spacewhile test 1 -eq 1 do read a $a if test $a = quitC then break fi d

This is the code: while test 1 -eq 1 do read a $a if test $a = stop then break fi done I read a command on every loop an execute it. I check if the string equals the word stop to end the loop,but it say that I gave too many arguments to test. For example echo hello. Now the... (1 Reply)
Discussion started by: Max89
1 Replies

8. Shell Programming and Scripting

How to Use Multiple if Conditions in Shell script

if -o ] then echo "Expected valid value" The above multiple if condition is NOT working in my script. I am getting the error as '-a' not expected. Can anyone help with the syntax for this? (5 Replies)
Discussion started by: dinesh1985
5 Replies

9. Shell Programming and Scripting

shell test command

I have a shell script, what i want to do is to use the test command and test it, but to be honest with you i really don't know, can someone give me some advices and how to use it? I have looked on the internet and saw some commands and scripts but the thing is where to start.....to test... (6 Replies)
Discussion started by: foottuns
6 Replies

10. Shell Programming and Scripting

test with two conditions (OR)

Hi there, I'm very surprised that I can't find this myself and I'm sorry to bother you with such a stupid question. I just want to write a test with one condition or another one. I want either the first argument to be equal to 'this' or the second argument to be equal to 'that'. ~$ cat test ((... (3 Replies)
Discussion started by: chebarbudo
3 Replies

Featured Tech Videos