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Shell Programming and Scripting
advanced awk
Post 302409288 by radoulov on Wednesday 31st of March 2010 03:03:10 PM
03-31-2010
Quote:
Code:
BEGIN { # do not put BEGIN on a line by itself
i = 0 # no need to initialize the counter,
# awk does this automatically
}
{
if (NF == 2) {
currgrp = $1
if ($2 ~ uname) {
netgroups[i] = currgrp # you shoud check if the username matches
i ++ # when NF == 2 too
}
}
else
{
if ($1 ~ uname) { # /uname/ matches litteral "uname"
netgroups[i] = currgrp
i ++
}
}
}
END { # do not put END on a line by itself
for(j = 0; j < i;j ++)
{
print netgroups[j] # j not i!
}
}|
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LEARN ABOUT REDHAT
uname
UNAME(1) FSF UNAME(1) NAME
uname - print system information SYNOPSIS
uname [OPTION]... DESCRIPTION
Print certain system information. With no OPTION, same as -s. -a, --all print all information, in the following order: -s, --kernel-name print the kernel name -n, --nodename print the network node hostname -r, --kernel-release print the kernel release -v, --kernel-version print the kernel version -m, --machine print the machine hardware name -p, --processor print the processor type -i, --hardware-platform print the hardware platform -o, --operating-system print the operating system --help display this help and exit --version output version information and exit AUTHOR
Written by David MacKenzie. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for uname is maintained as a Texinfo manual. If the info and uname programs are properly installed at your site, the command info uname should give you access to the complete manual. uname (coreutils) 4.5.3 February 2003 UNAME(1)