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Full Discussion: $? means?
Top Forums UNIX for Dummies Questions & Answers $? means? Post 302253935 by mathur on Monday 3rd of November 2008 06:28:56 AM
Old 11-03-2008
$? means?

Hi All,
Can you please explain wats the meaning of this

$?

in unix
Thanks
 

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sccshelp(1)						      General Commands Manual						       sccshelp(1)

NAME
sccshelp - ask for help on SCCS commands SYNOPSIS
[arg]... DESCRIPTION
The command finds information to explain a message from an SCCS command or to explain the use of a SCCS command. Zero or more arguments can be supplied. If no arguments are given, prompts for one: The arguments can be either message numbers (which normally appear in parentheses following messages) or command names, of one of the fol- lowing types: Type 1 Begins with nonnumerics, ends in numerics. The nonnumeric prefix is usually an abbreviation for the program or set of routines which produced the message (e.g., for message 6 from the command). Type 2 Does not contain numerics (as a command, such as Type 3 Is all numeric (e.g., The response of the program is the explanatory information related to the argument, if there is any. You can use to support other commands by means of the file. To do this, create help files in the appropriate format and add the location of the helpfiles to EXTERNAL INFLUENCES
Environment Variables determines the interpretation of text as single- and/or multibyte characters. determines the language in which messages are displayed. If is not specified or is null, it defaults to the value of If is not specified or is null, it defaults to "C" (see lang(5)). If any internationalization variable contains an invalid setting, all internationalization variables default to "C". See environ(5). International Code Set Support Single- and multibyte character code sets are supported. DIAGNOSTICS
When all else fails, try EXAMPLES
If you enter the SCCS command without parameters, you would get the message: If you request help for the command: it displays: If you request help for the error number: it displays: WARNINGS
Only SCCS commands currently use FILES
Directory containing files of message text List of commands supported by sccshelp File containing the locations of help files that are not in the directory sccshelp(1)
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