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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 OSF1
uname
uname(2) System Calls Manual uname(2) NAME
uname - Gets the name of the current system SYNOPSIS
#include <sys/utsname.h> int uname( struct utsname *name); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: uname(): XSH5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Points to a utsname structure. DESCRIPTION
The uname() function stores information identifying the current system in the structure pointed to by the name parameter. The uname() function uses the utsname structure, which is defined in the sys/utsname.h file and contains the following members: char sys- name[_SYS_NMLN]; char nodename[_SYS_NMLN]; char release[_SYS_NMLN]; char version[_SYS_NMLN]; char machine[_SYS_NMLN]; The uname() function returns a null-terminated character string naming the current system in the sysname character array. The nodename array contains the name that the system is known by on a communications network. The release and version arrays further identify the sys- tem. The machine array identifies the CPU hardware being used. RETURN VALUES
Upon successful completion, a nonnegative value is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
If the uname() function fails, errno may be set to the following value: [Tru64 UNIX] The name parameter points outside of the process address space. RELATED INFORMATION
Commands: uname(1) Standards: standards(5) delim off uname(2)