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Full Discussion: Computing an MD5Sum in C
Top Forums Programming Computing an MD5Sum in C Post 302411807 by snag49ers on Friday 9th of April 2010 12:56:45 PM
Old 04-09-2010
Thanks itkamaraj. The problem I'm having now though is that I am scanning the directory so the file that I'm using is stored in entry->d_name and when I call system("md5sum entry->d_name") it is actually trying to use entry->d_name instead of the actual filename. Do you know how I can get around this? Here's some of my code

Code:
while( ( entry = readdir( dp ) ) != NULL )
    {
        lstat( entry->d_name, &statbuf );
        
        if( S_ISDIR( statbuf.st_mode ) )
        {
            if( strcmp( ".", entry->d_name ) == 0 || strcmp( "..", entry->d_name ) == 0 )
            {
                continue;
            }
            
            printf( "%*s%s/\n", depth, "", entry->d_name );
            printdir( entry->d_name, depth+4 );
        }
        else
        {
            unsigned int md5;
            md5 = system("md5sum entry->d_name");
            printf( "%*s%s%d\n", depth, "", entry->d_name, md5 );
        }
        
    }

 

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LEARN ABOUT DEBIAN

nettle-hash

SEXP-CONV(1)							   Nettle tools 						      SEXP-CONV(1)

NAME

       nettle-hash - compute message digests

SYNOPSIS

       nettle-hash -a ALGORITHM [OPTIONS] [FILE]...

DESCRIPTION

       This manual page documents briefly the nettle-hash command.  This manual page was written for the Debian GNU/Linux distribution because the
       original program does not have a manual page.  Instead, it has documentation in the GNU Info format; see below.

       nettle-hash is a program that computes various message digests.	The output is different from the familiar md5sum and sha*sum  family.  For
       each file, the file name and a colon is printed first, unless input is read from standard input, in which case nothing is printed. Then the
       hash is printed in chunks of 64 bits (16 hexadecimal digits) followed by the name of the algorithm. In raw (binary) mode, the hash  is  not
       split in chunks and is not followed by a newline.

OPTIONS

       This program follows the usual GNU command line syntax, with long options starting with two dashes (`-').  A summary of options is included
       below.  For a complete description, see the Info files.

       -a, --algorithm=algorithm
	      Compute hash using algorithm.

       -l, --length=length
	      Truncate digests at length octets. It is an error to specify a length greater than the normal length of the selected digest.

       --list List supported hash algorithms.

       --help Show summary of options.

       -V, --version
	      Show version of program.

SEE ALSO

       md5sum(1), sha1sum(1), etc.

AUTHOR

       This manual page was originally written by Magnus Holmgren <holmgren@debian.org>, for the Debian GNU/Linux system (but may be used by  oth-
       ers).

nettle 2.2							     July 2011							      SEXP-CONV(1)
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