Alternative for wc -l Post: 302462844

Sponsored Content

Top Forums Shell Programming and Scripting Alternative for wc -l Post 302462844 by zaxxon on Friday 15th of October 2010 07:39:44 AM

10-15-2010

Registered User

@Methyl
Maybe use printf instead?

I think wc is just optimized for this task. Anyway here is a little C program you can compile with your favourite C compiler, for example:

Code:

gcc -Wall -o wcc wcc.c
# and then issue
./wcc yourfile

and try it out.

Code:

#include <stdio.h>
#include <stdlib.h>


#define MAX 2048

int main(int argc, char** argv)
{
        char zbuf[MAX];
        long int z=0;
        FILE *fp;

        fp=fopen(argv[1],"r");
        if( !fp )
        {
                fprintf(stderr, "Error: File %s could not be opened.\n", argv[1]);
                exit (EXIT_FAILURE);
        }
        else
        {
                while ( fgets(zbuf, MAX, fp) )
                {
                        z++;
                }
        }
        fclose(fp);
        printf("Line count: %li\n", z);
        exit (EXIT_SUCCESS);
        return 0;
}

I have set the maximum line length to 2048 - maybe you want to increase this if it is not sufficient for your file. Maybe worth a try. I am no C programmer so maybe someone has even an idea to improve it.

It could be also the case that your hardware/OS is the bottle neck - just a guess.

Last edited by zaxxon; 10-15-2010 at 09:01 AM.. Reason: changed printf to long integer according to definition of z

zaxxon

View Public Profile for zaxxon

Find all posts by zaxxon

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

getopts alternative?

I have to implement switches (options) like this in my script. ./myscript -help ./myscript -dir /home/krish -all ./myscript -all getopts allows switches to have one character (like a, b, etc.). How can I customize it for handling the above situation? Or, is there any alternative to...

2. Shell Programming and Scripting

help with while loop or any other alternative?

i=1 while do mm=02 dd=03 yy=2008 echo "$mm$dd$yy" i=$(( i+1)) echo "$i" done whenever i execute the script above i will get the error below: syntax error at line 30: `i=$' unexpected

3. Shell Programming and Scripting

du alternative in perl

I have a perl script that just does a `du -sk -x` and formats it to look groovy ( the argument can be a directory but usually is like /usr/local/* ) #!/usr/bin/perl use strict; use warnings; my $sizes = `du -x -sk @ARGV | sort -n`; my $total = 0; print "MegaBytes Name\n"; for(split...

4. HP-UX

alternative for egrep -o on HP-UX

Hello to all board members!! I have a problem on a HP-UX system. I should write a script. Therefore I need to search after IP addresses in the output of a command. On Debian this works: ifconfig | egrep -o "{1,3}\.{1,3}\.{1,3}\.{1,3}" The script where i need this is not ifconfig, but...

5. Shell Programming and Scripting

Alternative for ikecert

Hi Folks... Is there an alternative for ikecert(SunOS) - man info - "manipulates the machine's on-filesystem public-key certificate databases" in linux? Can we use pkcs7, pkcs8 or something like that?... I also came across ssh-keygen and ssh-keygen2... My best guess is to use ssh-certtool...

6. Solaris

Alternative to sshfs?

I have an automated testing script that relies on the dev box being able to see production's (NFS) share. It uses rsync and ssh to handle transfers and command execution; however, it also needs the production share mounted in order to run Perl code against it when Unix commands via ssh will not do....

7. Solaris

vi alternative

Is there any other editor, installed by 'default' in Sparc Solaris10, besides vi? I'd like to avoid installing anything new. If not, how to make vi more user-friendly? thanks.

8. Shell Programming and Scripting

Looking for an alternative to Tcl

I've created quite a collection of tcl scripts which have buttons, radio buttons, check boxes, text fields, etc. These tcl scripts in turn call and execute several hundred sh, csh, bash, perl scripts and pass in the args based on the gui selections on the same and other redhat machines. We're...

LEARN ABOUT LINUX

bswap_64

BSWAP(3)						     Linux Programmer's Manual							  BSWAP(3)

NAME

       bswap_16, bswap_32, bswap_64 - reverse order of bytes

SYNOPSIS

       #include <byteswap.h>

       bswap_16(x);
       bswap_32(x);
       bswap_64(x);

DESCRIPTION

       These macros return a value in which the order of the bytes in their 2-, 4-, or 8-byte arguments is reversed.

RETURN VALUE

       These macros return the value of their argument with the bytes reversed.

ERRORS

       These macros always succeed.

CONFORMING TO

       These macros are GNU extensions.

EXAMPLE

       The  program  below  swaps the bytes of the 8-byte integer supplied as its command-line argument.  The following shell session demonstrates
       the use of the program:

	   $ ./a.out 0x0123456789abcdef
	   0x123456789abcdef ==> 0xefcdab8967452301

   Program source

       #include <stdio.h>
       #include <stdint.h>
       #include <stdlib.h>
       #include <inttypes.h>
       #include <byteswap.h>

       int
       main(int argc, char *argv[])
       {
	   uint64_t x;

	   if (argc != 2) {
	       fprintf(stderr, "Usage: %s <num>
", argv[0]);
	       exit(EXIT_FAILURE);
	   }

	   x = strtoul(argv[1], NULL, 0);
	   printf("0x%" PRIx64 " ==> 0x%" PRIx64 "
", x, bswap_64(x));

	   exit(EXIT_SUCCESS);
       }

SEE ALSO

       byteorder(3), endian(3)

Linux								    2019-03-06								  BSWAP(3)