test a string... Post: 302166511

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

string test?

hey guys- what is the syntax for a string test to verify that a user has entered a 6 digit numeric? Thanks for your help in advance! Todd

2. Shell Programming and Scripting

ksh - test if string contains alphanumeric...

Okay I will let users input spaces as well :) I am having a mental block. I have done a couple of searches but havent found anything that I understand (the likes of :alpha: and awk). Basically I want to give the user an option to enter some text which will go down as a field within a flat...

3. 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...

4. 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. Shell Programming and Scripting

string test in IF statement

How do I test multiple words in a string test like below: if ] then print "You entered $TBS name.\n" else print "You entered an incorrect response.\n" fi This test does not work. I have tried different syntax versions. How does this work? And is there a better way to do it? ...

6. Shell Programming and Scripting

Test of more than one number on the end of a string

Hi there, I have a bunch of interface names like e1000g0 nge1 dmfe3 I also have some that have longer (vlan tagged) names like e1000g123001 nge23003 e1000g999002 I need to determine whether the interface is one of the former or latter types and I would do that by seeing...

7. Shell Programming and Scripting

Test if string exists

How do I use bash to test whether a string occurs more than two times in a file?

8. Shell Programming and Scripting

string test

How do I use bash to test if a line begins with a random number of spaces followed by a letter?

9. Shell Programming and Scripting

test for a blank string

Hi guys I am performing a simple test for a blank string with the following code: if ] ]] ; then echo "Blanks are NOT a valid input " return 1 fi The above fails giving a syntax error message: syntax error at line 142 : `=~' unexpected I am in ksh88 is there...

10. Shell Programming and Scripting

To test whether a field contains string value

I want to find whether string values are available in a field of a file. Let it be any character other than number . I just want to know whether characters will be available in it . Please share a single step command for this without creating a shell script.

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)