02-06-2011
Quote:
Originally Posted by
mike12
Hi Scrutinizer,
Thanks a lot for the script. It worked. But can you please run me through the script?
Thanks again,
Mike
Hi Mike, here you go:
awk -F: | Use a colon as a input separator at the start of the script |
'BEGIN{ | In the begin section ( before stdin gets read) |
while("lsuser -c -a id ALL" *pipe* getline) U[$2]=$1 | read every line of the command using : as a separator and put everything in Array U with index of field 2 and a value of field 1 |
while("lsgroup -c -a id ALL" *pipe* getline) G[$2]=$1 | Same for group array G |
{sub($3" +"$4, U[$3]" "G[$4])} | Reading stdin, for every line, substitute fields $3 and $4 with their lookup values containing the long names (keep the formtting of the rest of the line unchanged..) |
1 | print every record (line) |
FS=" " | change the input field separator to the default value (space separated) just before stdin gets read |
S.
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JOIN(1) General Commands Manual JOIN(1)
NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard
input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specifed in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO
sort(1), comm(1), awk(1)
BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
JOIN(1)