abalone shell value

The Shell also supports functions. The Shell function must be defined before use.The Shell functions are defined in the following format:Function_name () { List of commands [return value]}If you prefer, you can also add keyword functions to the function name:function function_name () { List of commands [ret

Label:Several cases of sqlplus and shell passing value to each other Scenario One: The simplest invocation of sqlplus in the shell $cat test.sh #!/bin/sh Sqlplus Oracle/[email Protected]>file.log SELECT * from Test; Exit EOF #注意EOF要顶格写 $sh test.sh $cat File.log --Omit a number of system prompt information------- Sql> EMPNO EmpName SAL DEPTNO -------------------

Using variables from the shell in awk One: "' $var '" In this way, you don't have to change the habit of using the AWK program, which is commonly used by foreigners. Such as: var= "Test" awk ' begin{print ' $var ' "} ' This notation is actually a constant that is double-parenthesis into parentheses, passed to awk. If the var contains spaces, for the shell not to use the space as a separator, it should be u

This article mainly introduced the shell in the function return value exceeds the problem, the shell returns by return is limited, the maximum return 255, more than 255, then starts from 0 computation, needs the friend may refer to under 1. Preface Almost six months did not write a blog, deserted for a long time, the work of the chores too much, their own more

The Linux shell can be user-defined functions and can be called casually in shell scripts. Here's how to define it, and what to call attention to. I. Defining shell functions (define function)Grammar: [Function] funname [()] { Action [Return int;] } Description 1, can be with function fun () definition, you can also directly

Label:Several cases of sqlplus and shell passing value to each other Scenario One: The simplest invocation of sqlplus in the shell $cat test.sh #!/bin/sh Sqlplus Oracle/[email Protected]>file.log SELECT * from Test; Exit EOF #注意EOF要顶格写 $sh test.sh $cat File.log --Omit a number of system prompt information------- Sql> EMPNO EmpName SAL DEPTNO -------------------

Several cases of sqlplus and shell passing value to each otherScenario One: The simplest invocation of sqlplus in the shell$cat test.sh#!/bin/shSqlplus Oracle/[email Protected]>file.log SELECT * from Test;ExitEOF #注意EOF要顶格写$sh test.sh$cat File.log--Omit a number of system prompt information-------Sql>EMPNO EmpName SAL DEPTNO-----------------------------10002 Fran

[Seemingly challenging] How does shell obtain the return value in php? for example, the php file returns an array nbsp; PHPcode lt ;? Phpreturnarray (a gt; 1, B gt; 2, c gt; public, d gt;, e gt ;,);? Gt; in she [seemingly challenging] How does shell get the return value in php? The php file returns an array.

can use this method only if you want to split the results, such as with awk:Click ( here) to collapse or open #!/bin/ksh # # created:2015.05.25 # updated:2015.05.25 # Author:jet Chenxi Zhang # Description:get SELECT results in Shell # Variable Definitions # Oracle_sid=audtest Oracle_home=/app/oracle/product/database/11.2.0/db_1 Path= $PATH: $ORACLE _home/bin queryres= Dbid= Dbname=

Defining shell functions (define function)Grammar: [ function ] funname [()]{ action; [return int;]}说明：1. 可以带function fun() 定义，也可以直接fun() 定义,不带任何参数。2. 参数返回，可以显示加：return 返回，如果不加，将以最后一条命令运行结果，作为返回值。 return后跟数值n(0-255)。 Example (test_fun.sh): #!/bin/shfSum 3 2;fSum(){ echo $1,$2; return $(($1+$2));}fSum 5 7;total=$(fSum 3 2);echo $total,$?; From the above example we can get a few conclusions: The function must be declared before the

* * #define Ex_config/* Configuration Error */#define EX__MAX//maximum listed value */ Use example one to exit the current shell[Email protected] ~]# [[email protected] ~]# exit logoutExample two in the script, go to the directory where the script is located, or exit the bash code CD $ (dirname $0) | | Exit 1 CD $ (dirname $) | | Exit 1Example three in the script, determine the number of par

"Seemingly challenging" how the shell gets the value of return in PHP Title PHP This file is to return an array PHP Code ' 1 ', ' b ' = ' 2 ', ' c ' = ' public ', ' d ' = ' ', ' e ' = = ', '; > In the shell how to receive this array ah or there is no way ------Solution-------------------- PHP Code [User:root time:07:23:08 path:

#!/bin/shsum (){echo $ (($1+$2))return $ (($1-$2))}Sum $c=$ (sum $)echo $?Echo $cExecute command:./bashtest 1The operating result is:12--sum Results10--echo $? result because the value of return is ten12--echo $c result, the value is 12, so C will not be appended with the return value, echo $c call the Sum function, so print aour understanding of the return

In the process of writing shell scripts, we often customize some functions and execute the corresponding process according to the function's return value, so how do we get the return value of the function?There are two ways to call a function in the shell first:The first kind: valu