10-21-2009
You don't always want to exit on error and even when you do you often want to output a meaningful error message so you should pass that in as well prior to testing the exit code.
I am not sure if your code is testing the return code of the command or the success of the redirection to the log, couldn't say without fooling around with it.
Probably better to tee the output rather than redirect it so you can see what is going on
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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)