A little help please Post: 302145577

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Top Forums Shell Programming and Scripting A little help please Post 302145577 by porter on Wednesday 14th of November 2007 04:41:37 PM

11-14-2007

Registered User

$? is a variable that holds the return code of the last command.

Code:

echo $?

also

$$ is a variable that holds the current process id
$! is a variable that holds the pid of a process launched asynchronously
$0 holds the current script name
$1 ..... hold each argument from the command line
$@ holds all the command line arguments

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LEARN ABOUT DEBIAN

type_integer

form_variables(3FORM)													     form_variables(3FORM)

NAME

       TYPE_ALNUM, TYPE_ALPHA, TYPE_ENUM, TYPE_INTEGER, TYPE_IPV4, TYPE_NUMERIC, TYPE_REGEXP - form system global variables

SYNOPSIS

       #include <form.h>

       FIELDTYPE * TYPE_ALNUM;
       FIELDTYPE * TYPE_ALPHA;
       FIELDTYPE * TYPE_ENUM;
       FIELDTYPE * TYPE_INTEGER;
       FIELDTYPE * TYPE_IPV4;
       FIELDTYPE * TYPE_NUMERIC;
       FIELDTYPE * TYPE_REGEXP;

DESCRIPTION

       These  are  building blocks for the form library, defining fields that can be created using set_fieldtype(3X).  Each provides functions for
       field- and character-validation, according to the given datatype.

   TYPE_ALNUM
       This holds alphanumeric data.

   TYPE_ALPHA
       This holds alphabetic data.

   TYPE_ENUM
       This holds an enumerated type.

   TYPE_INTEGER
       This holds a decimal integer.

   TYPE_IPV4
       This holds an IPv4 internet address, e.g., "127.0.0.1".

   TYPE_NUMERIC
       This holds a decimal number, with optional sign and decimal point.

   TYPE_REGEXP
       This holds a regular expression.

PORTABILITY

       The TYPE_IPV4 variable is an extension not provided by older implementations of the form library.

SEE ALSO

       form(3FORM).

															     form_variables(3FORM)