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Full Discussion: redirect to both file and std output at the same time
Top Forums UNIX for Advanced & Expert Users redirect to both file and std output at the same time Post 302239482 by Gee-Money on Tuesday 23rd of September 2008 09:30:13 PM
Old 09-23-2008
I'm not sure which unix you are using, but if you have the 'tee' command installed, you can use that.

Code:
# echo hello | tee outfile
hello

Code:
# cat outfile
hello

you can use the -a option to just append to the file

Code:
# echo world | tee -a outfile

and now you have

Code:
# cat outfile
hello
world

If you dont have tee, and cant install it, then you are probably looking at some crazy file descriptor re-assignment/redirection, of which i'm not entirely keen.
 

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LEARN ABOUT SUNOS

tee

tee(1)								   User Commands							    tee(1)

NAME

       tee - replicate the standard output

SYNOPSIS

       tee [-ai] [file...]

DESCRIPTION

       The  tee  utility  will	copy  standard	input to standard output, making a copy in zero or more files. tee will not buffer its output. The
       options determine if the specified files are overwritten or appended to.

OPTIONS

       The following options are supported.

       -a	Appends the output to the files rather than overwriting them.

       -i	Ignores interrupts.

OPERANDS

       The following operands are supported:

       file	A path name of an output file.	Processing of at least 13 file operands will be 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

       The following exit values are returned:

       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.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cat(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.10							    20 Dec 1996 							    tee(1)
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