[A-Z]\\[A-Z0-9_]+)+ An uppercase DOS/Windows full path that (a) is not the root of a drive, and (b) has only letters, numbers, and underscores in its text.
[A-Za-z][A-Za-z0-9_]* A ColdFusion variable with no qualifier.
([A-Za-z][A-Za-z0-9_]*)(\.[A-Za-z][A-Za-z0-9_]*)? A ColdFusion variable with no more than one qualifier; for example, Form.VarName, but not Form.Image.VarName.
(\+|-)?[1-9][0-9]* An integer that does not begin with a zero and has an optional sign.
(\+|-)?[1-9][0-9]*(\.[0-9]*)? A real number.
(\+|-)?[1-9]\.[0-9]*E(\+|-)?[0-9]+ A real number in engineering notation.
a{2,4} Two to four occurrences of "a": aa, aaa, aaaa.
(ba){3,} At least three "ba" pairs: bababa, babababa, and so on..
$ ls
monkey.txt
banana.csv
tree.txt
$ myscript monkey.txt tree.txt
All extensions ARE alike.
$ myscript *txt
All extensions ARE alike.
$ myscript monkey.txt banana.csv
All extensions are NOT alike.
$ myscript *
All extensions are NOT alike.
My brain has given up; what's the simplest... (11 Replies)
I have the below script in file read_file.ksh if ] || ]
then
echo "Required one input file"
echo "Enter a file to get char count:"
read $FILE_NAME
if ]
then
echo "valid file"
else
echo "Not a valid file."
fi
When run as read_file.ksh detail.csv or... (9 Replies)
i want to write a shell script function that will ftp the files passed in the command line . i have written a shell script for ftp but how will it do for all files passed in command line argument ,
i am passing 4 files as argument
./ftp.sh file1 file2 file3 file4
code written by me... (5 Replies)
I want to make a script that check for the argument passed to it and generates an error in case any character/string argument passed to it.
I am using below code, but its not working. can anyone help.
#!/bin/bash
if ]; then
echo 'An integer argument is passed to the script hence... (3 Replies)
I have a script.
#!/bin/sh
cur_$1_modify_time=Hello
echo "cur_$1_modify_time"
When I run like
sh /root/script1 jj
I expect value "Hello" being assigned to variable "cur_jj_modify_time" and output being "Hello" ie echoing $cur_jj_modify_time
But the output comes as
# sh... (3 Replies)
Hi,
I am working in bash in Mac OSX, I have following 'input.txt' file:
<INFO> HypoTestTool: >>> Done running HypoTestInverter on the workspace combined
<INFO> HypoTestTool: The computed upper limit is: 11 +/- 1.02651
<INFO> HypoTestTool: expected limit (median) 11
<INFO> HypoTestTool: ... (13 Replies)
Hi Experts,
I have been trying to work on a simple shell script that will just add the two argument passed to it. Here is what i tried :
#!/bin/bash
welcome(){
echo "Welcome to this Progg. which will accept two parameter"
}
main_logic(){
arg=$#
echo "Number of argument passed is... (4 Replies)
Discussion started by: mukulverma2408
4 Replies
LEARN ABOUT SUNOS
expr
expr(1) User Commands expr(1)NAME
expr - evaluate arguments as an expression
SYNOPSIS
/usr/bin/expr argument...
/usr/xpg4/bin/expr argument...
/usr/xpg6/bin/expr argument...
DESCRIPTION
/usr/bin/expr, /usr/xpg4/bin/expr
The expr utility evaluates the expression and writes the result to standard output. The character 0 is written to indicate a zero value and
nothing is written to indicate a null string.
/usr/xpg6/bin/expr
The expr utility evaluates the expression and writes the result to standard output followed by a NEWLINE. If there is no result from expr
processing, a NEWLINE is written to standard output.
OPERANDS
The argument operand is evaluated as an expression. Terms of the expression must be separated by blanks. Characters special to the shell
must be escaped (see sh(1)). Strings containing blanks or other special characters should be quoted. The length of the expression is lim-
ited to LINE_MAX (2048 characters).
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped within
{} symbols. All of the operators are left-associative.
expr | expr
Returns the evaluation of the first expr if it is neither NULL nor 0; otherwise, returns the evaluation of the second expr if it is not
NULL; otherwise, 0.
expr & expr
Returns the first expr if neither expr is NULL or 0, otherwise returns 0.
expr{ =, >, >=, <, <=, !=} expr
Returns the result of an integer comparison if both arguments are integers, otherwise returns the result of a string comparison using
the locale-specific coalition sequence. The result of each comparison will be 1 if the specified relationship is TRUE, 0 if the rela-
tionship is FALSE.
expr { +, - } expr
Addition or subtraction of integer-valued arguments.
expr { *, /, %} expr
Multiplication, division, or remainder of the integer-valued arguments.
expr : expr
The matching operator : (colon) compares the first argument with the second argument, which must be an internationalized basic regular
expression (BRE), except that all patterns are anchored to the beginning of the string. That is, only sequences starting at the first
character of a string are matched by the regular expression. See regex(5) and NOTES. Normally, the /usr/bin/expr matching operator
returns the number of bytes matched and the /usr/xpg4/bin/expr matching operator returns the number of characters matched (0 on fail-
ure). If the second argument contains at least one BRE sub-expression [(...)], the matching operator returns the string corresponding
to 1.
integer
An argument consisting only of an (optional) unary minus followed by digits.
string
A string argument that cannot be identified as an integer argument or as one of the expression operator symbols.
Compatibility Operators (x86 only)
The following operators are included for compatibility with INTERACTIVE UNIX System only and are not intended to be used by non- INTERAC-
TIVE UNIX System scripts:
index string character-list
Report the first position in which any one of the bytes in character-list matches a byte in string.
length string
Return the length (that is, the number of bytes) of string.
substr string integer-1 integer-2
Extract the substring of string starting at position integer-1 and of length integer-2 bytes. If integer-1 has a value greater than
the number of bytes in string, expr returns a null string. If you try to extract more bytes than there are in string, expr returns all
the remaining bytes from string. Results are unspecified if either integer-1 or integer-2 is a negative value.
EXAMPLES
Example 1: Adding an integer to a shell variable
Add 1 to the shell variable a:
example$ a=`expr $a + 1`
Example 2: Returning a path name segment
The following example emulates basename(1), returning the last segment of the path name $a. For $a equal to either /usr/abc/file or just
file, the example returns file. (Watch out for / alone as an argument: expr takes it as the division operator. See NOTES below.)
example$ expr $a : '.*/(.*)' | $a
Example 3: Using // characters to simplify the expression
Here is a better version of the previous example. The addition of the // characters eliminates any ambiguity about the division operator
and simplifies the whole expression.
example$ expr //$a : '.*/(.*)'
/usr/bin/expr
Example 4: Returning the number of bytes in a variable
example$ expr "$VAR" : '.*'
/usr/xpg4/bin/expr
Example 5: Returning the number of characters in a variable
example$ expr "$VAR" : '.*'
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of expr: LANG, LC_ALL, LC_COLLATE,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
EXIT STATUS
As a side effect of expression evaluation, expr returns the following exit values:
0 If the expression is neither NULL nor 0.
1 If the expression is either NULL or 0.
2 For invalid expressions.
>2 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO basename(1), ed(1), sh(1), Intro(3), attributes(5), environ(5), regex(5), standards(5)DIAGNOSTICS
syntax error Operator and operand errors.
non-numeric argument Arithmetic is attempted on such a string.
NOTES
After argument processing by the shell, expr cannot tell the difference between an operator and an operand except by the value. If $a is an
=, the command:
example$ expr $a = '='
looks like:
example$ expr = = =
as the arguments are passed to expr (and they are all taken as the = operator). The following works:
example$ expr X$a = X=
Regular Expressions
Unlike some previous versions, expr uses Internationalized Basic Regular Expressions for all system-provided locales. Internationalized
Regular Expressions are explained on the regex(5) manual page.
SunOS 5.10 29 Aug 2003 expr(1)
11-04-2002
\\[A-Z0-9_]+)+ An uppercase DOS/Windows full path that (a) is not the root of a drive, and (b) has only letters, numbers, and underscores in its text.