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Top Forums Shell Programming and Scripting if clause problem ..err is : integer expression expected Post 302358688 by ahmad.diab on Sunday 4th of October 2009 05:30:31 AM
Old 10-04-2009
Code:
A binary comparison operator compares two variables or quantities. Note that integer and string comparison
use a different set of operators.
integer comparison
-eq
is equal to
if [ "$a" -eq "$b" ]
-ne
is not equal to
if [ "$a" -ne "$b" ]
-gt
is greater than
if [ "$a" -gt "$b" ]
-ge
is greater than or equal to
if [ "$a" -ge "$b" ]
-lt
is less than
if [ "$a" -lt "$b" ]
-le
is less than or equal to
if [ "$a" -le "$b" ]

<
is less than (within double parentheses)
(("$a" < "$b"))
<=
is less than or equal to (within double parentheses)
(("$a" <= "$b"))
>
is greater than (within double parentheses)
(("$a" > "$b"))
>=
is greater than or equal to (within double parentheses)
(("$a" >= "$b"))
string comparison
=
is equal to
if [ "$a" = "$b" ]
==
is equal to
if [ "$a" == "$b" ]

!=
is not equal to
if [ "$a" != "$b" ]
This operator uses pattern matching within a [[ ... ]] construct.
<
is less than, in ASCII alphabetical order
if [[ "$a" < "$b" ]]

if [ "$a" \< "$b" ]
Note that the "<" needs to be escaped within a [ ] construct.
>
is greater than, in ASCII alphabetical order
if [[ "$a" > "$b" ]]
if [ "$a" \> "$b" ]
Note that the ">" needs to be escaped within a [ ] construct.


in conclusion (using bash or ksh shells) :-
you are testing 2 numerical variables (numbers) you have to use the first kind of operators (-eq) not the string operator
you can use the string operator in double parentheses ( [[..]] )

so use [[ "$rcInPAudit" = "$rcInP" ]] or [ "$rcInPAudit" -eq "$rcInP" ] to eliminate the error.

BR

 

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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)
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