04-16-2008
script to convert epoch into human-readable
This is what I have to start out with
more file
1208217600
1208131200
1193806800
I want to convert the epoch column into a human-readable format. My file has hundreds of these epoch times that I want to loop through and convert. (The epoch time is really the last column of the line)
This is what I am trying
cat file |while read EPOCH
do
READABLE=`gawk 'BEGIN{print strftime("%c", $EPOCH )}'` # not working
READABLE=`gawk 'BEGIN{print strftime("%c",1144172897)}'` # works
echo $READABLE
done
why does the second line work when I hard code the epoch time in?
and the first line where I am reading in the variable not work?
reading about the syntax of the strftime
strftime([format [,timestamp]])
evidently timestamp has to be a number and not a variable
any ideas?
I don't have perl on this box but I do have nawk and awk and sed
Thanks
David
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LEARN ABOUT OPENSOLARIS
igawk
IGAWK(1) Utility Commands IGAWK(1)
NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO
gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Availability | SUNWgawk |
+--------------------+-----------------+
|Interface Stability | Volatile |
+--------------------+-----------------+
NOTES
Source for gawk is available on http://opensolaris.org.
Free Software Foundation Nov 3 1999 IGAWK(1)