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Full Discussion: Procedure execution
Top Forums Shell Programming and Scripting Procedure execution Post 302816527 by Scott on Tuesday 4th of June 2013 06:12:53 AM
Old 06-04-2013
Code:
PROCEDURE 1 &&
PROCEDURE 2 &&
PROCEDURE 3 &&
PROCEDURE 4 || echo error

Code:
       A list is a sequence of one or more pipelines separated by one of the operators ;, &, &&, or ||, and optionally
       terminated by one of ;, &, or <newline>.

       Of these list operators, && and || have equal precedence, followed by ; and &, which have equal precedence.

       A sequence of one or more newlines may appear in a list instead of a semicolon to delimit commands.

       If  a  command  is  terminated by the control operator &, the shell executes the command in the background in a
       subshell.  The shell does not wait for the command to finish, and the return status is 0.   Commands  separated
       by  a ; are executed sequentially; the shell waits for each command to terminate in turn.  The return status is
       the exit status of the last command executed.

       The control operators && and || denote AND lists and OR lists, respectively.  An AND list has the form

              command1 && command2

       command2 is executed if, and only if, command1 returns an exit status of zero.

       An OR list has the form

              command1 || command2

Of course, I've made an assumption about what you mean by PROCEDURE - i.e. in what context are you using procedures? Shell? Database? Some other language?
 

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exit(1)                                                            User Commands                                                           exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)
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