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Shell Programming and Scripting
output and error redirection
Post 302344963 by jpriyank on Tuesday 18th of August 2009 05:44:27 AM
08-18-2009
output and error redirection
hi 
if condition >&- 2>&-
Can anybody explain the redirection in above command
Thanks in advance
if condition >&- 2>&-
Can anybody explain the redirection in above command
Thanks in advance
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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)