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Full Discussion: advanced awk
Top Forums Shell Programming and Scripting advanced awk Post 302409253 by wakatana on Wednesday 31st of March 2010 01:15:25 PM
Old 03-31-2010
advanced awk

Hi all

Input
Code:
group1	user1
	user2
	user3
group2	user4
	user5
	user1
group3	user6
	user7
	user8

Desired output
Code:
group1
group2

So far I've tried, but did not work
Code:
BEGIN
{
  i=0;                                  # declaring variable
}

{
  if (NF==2){currgrp=$1;}               # check whether awk actually processing 2 column record, if yes save the group name
  else
     {
      if ($1~/uname/)                   # else if awk is processing 1 column record and is found user name, save the group name to array and increment i
       {
         netgroups[i]=currgrp;
         i++;
       }
     }
}

END                                     # at the end of processing whole file print the array (all saved groups)
{
  for(j=0;j<i;j++)
  {
    print netgroups[i];
  }
}

skript was called
Code:
awk -v uname="user1" -f awkscript.awk group_file

what is wrong with script above ?
 

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MPI_Group_union(3OpenMPI)												 MPI_Group_union(3OpenMPI)

NAME
MPI_Group_union - Produces a group by combining two groups. SYNTAX
C Syntax #include <mpi.h> int MPI_Group_union(MPI_Group group1, MPI_Group group2, MPI_Group *newgroup) Fortran Syntax INCLUDE 'mpif.h' MPI_GROUP_UNION(GROUP1, GROUP2, NEWGROUP, IERROR) INTEGER GROUP1, GROUP2, NEWGROUP, IERROR C++ Syntax #include <mpi.h> static Group Group::Union(const Group& group1, const Group& group2) INPUT PARAMETERS
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newgroup Union group (handle). IERROR Fortran only: Error status (integer). DESCRIPTION
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Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func- tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object. Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error. SEE ALSO
MPI_Group_free Open MPI 1.2 September 2006 MPI_Group_union(3OpenMPI)
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