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Full Discussion: 'tee' STDERR output (ksh)
Top Forums Shell Programming and Scripting 'tee' STDERR output (ksh) Post 26619 by gsatch on Wednesday 21st of August 2002 11:57:49 AM
Old 08-21-2002
Perderabo, you da the man!! (of course, making a gender assumption there). That worked beautifully!! Question for you as this is the 1st time I've come accross file descriptor 3 - 1 is STDOUT, 2 is STDERR but 3? And, if you don't mind - what is the last redirection "3>&-" doing?

Thanks Perderabo!!

Asifraj - I can't use just "2> error" because then it won't also go to the screen. I want the user to know there was an error but I don't want to have to rely on them to know what the error is.

Optimus_P - while that would work for getting the errors to the screen and a file, it would also send STDOUT to the same file, which I don't want (I have a debug log that I want to contain only debug and error messages).

Thanks everyone!
 

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tee(1)								   User Commands							    tee(1)

NAME
tee - replicate the standard output SYNOPSIS
/usr/bin/tee /usr/bin/tee [-ai] [file]... ksh93 tee [-ail] [file]... DESCRIPTION
/usr/bin/tee /usr/bin/tee copies standard input to standard output, making a copy in zero or more files. tee does not buffer its output. The options determine if the specified files are overwritten or appended to. ksh93 The tee built-in in ksh93 is associated with the /bin and /usr/bin paths. It is invoked when tee is executed without a pathname prefix and the pathname search finds a /bin/tee or /usr/bin/tee executable. tee copies standard input to standard output and to zero or more files. The options determine whether the specified files are overwritten or appended to. The tee utility does not buffer output. If a write to a file fails, tee continues to write to other files although it exits with a non-zero exit status. The number of file operands that can be specified is limited by the underlying operating system. OPTIONS
/usr/bin/tee The following options are supported by /usr/bin/tee: -a Appends the output to the files rather than overwriting them. -i Ignores interrupts. ksh93 The following options are supported by the tee built-in command in ksh93: -a Appends the output to the files rather than overwriting them. --append -i Ignores SIGINT signal. --ignore-interrupts -l Sets the standard output to be line buffered. --line-buffer OPERANDS
The following operands are supported: file A path name of an output file. Processing of at least 13 file operands are supported. USAGE
See largefile(5) for the description of the behavior of tee when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes). ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of tee: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. EXIT STATUS
/usr/bin/tee The following exit values are returned by /usr/bin/tee: 0 The standard input was successfully copied to all output files. >0 The number of files that could not be opened or whose status could not be obtained. ksh93 The following exit values are returned by tee in ksh93: 0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: /usr/bin/tee +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+ ksh93 +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |See below. | +-----------------------------+-----------------------------+ The ksh93 built-in binding to /bin and /usr/bin is Volatile. The built-in interfaces are Uncommitted. SEE ALSO
cat(1), ksh93(1), attributes(5), environ(5), largefile(5), standards(5) SunOS 5.11 20 Nov 2007 tee(1)
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