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Homework and Emergencies Homework & Coursework Questions ls in specific columns
# 1  
Old 11-08-2011
ls in specific columns
Hello,

i need to get the ls output in 2 columns.1st column the directories and 2nd the files...
Also each column must be sorted by time...

For example if the >>ls command gives me this :
Code:
/dir2   /dir   /dir1
/dir3   file1  file2

I need to take this :
Code:
/dir        file1
/dir1       file2
/dir2
/dir3

...and also each column sorted by time Smilie
# 2  
Old 11-08-2011
This should work. It adjusts the directory column size based on the largest names seen in the list:

Code:
ls -pt | awk '
    /\/$/ {
        dcol[didx++] = $1;
        if( length( $1 ) > dmax )
            dmax = length( $1 );
        next;
    }
    {
        ccol[cidx++] = $1;
        next;
    }
    END {
        fmt = sprintf( "%%-%ds %%s\n", dmax );
        stop = didx > cidx ? didx : cidx;
        for( i = 0; i < stop; i++ )
            printf( fmt, dcol[i], ccol[i] );
    }
'

Last edited by agama; 11-08-2011 at 10:49 PM.. Reason: tweek.
This User Gave Thanks to agama For This Post:
giampoul
# 3  
Old 11-09-2011
Quote:
Originally Posted by agama
This should work. It adjusts the directory column size based on the largest names seen in the list:

Code:
ls -pt | awk '
    /\/$/ {
        dcol[didx++] = $1;
        if( length( $1 ) > dmax )
            dmax = length( $1 );
        next;
    }
    {
        ccol[cidx++] = $1;
        next;
    }
    END {
        fmt = sprintf( "%%-%ds %%s\n", dmax );
        stop = didx > cidx ? didx : cidx;
        for( i = 0; i < stop; i++ )
            printf( fmt, dcol[i], ccol[i] );
    }
'

Very useful answer, thanks !
I try it but if a folder or file has space inside its name it doesn't give me the continue after the space..
for example if i have:
Code:
/dir 1  /file.exe
/dir 2  /dir3

I will get this answer:
Code:
/dir     /file.exe
/dir
/dir3

Smilie any ideas?
Also i have to use it inside c code.I should use system(); ??
Last edited by giampoul; 11-09-2011 at 09:29 AM..
# 4  
Old 11-09-2011
Quote:
Originally Posted by giampoul
Also i have to use it inside c code.I should use system(); ??
Was ls specified in the question? Otherwise they might be expecting you to use C functions.
This User Gave Thanks to CarloM For This Post:
giampoul
# 5  
Old 11-09-2011
Quote:
Originally Posted by CarloM
Was ls specified in the question? Otherwise they might be expecting you to use C functions.
It doesn't say exactly...
Maybe i should save the ls in a .txt (ls -l > a.txt)
and then sort the .txt but i don't know how to do that either Smilie
# 6  
Old 11-09-2011
I'd start with ls -F1
This User Gave Thanks to vgersh99 For This Post:
giampoul
# 7  
Old 11-09-2011
Quote:
Originally Posted by giampoul
It doesn't say exactly...
Maybe i should save the ls in a .txt (ls -l > a.txt)
and then sort the .txt but i don't know how to do that either Smilie
I was thinking more that they might be expecting you to use opendir and readdir.
This User Gave Thanks to CarloM For This Post:
giampoul
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