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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include "h5tools_utils.h"
void parse_command_line (int argc, const char *argv[]);
#define TRUE 1
#define FALSE 0
static char *progname="getub";
char *nbytes = NULL;
static const char *s_opts = "c:"; /* add more later ? */
static struct long_options l_opts[] = {
{"c", require_arg, 'c'}, /* input file */
{NULL, 0, '\0'}
};
/*-------------------------------------------------------------------------
* Function: usage
*
* Purpose: Print the usage message
*
* Return: void
*
* Programmer:
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void
usage (const char *prog)
{
fflush (stdout);
fprintf (stdout, "usage: %s -c nb file] \n", prog);
fprintf (stdout, " print first 'nb' byts of file to stdoug.\n");
}
/*-------------------------------------------------------------------------
* Function: parse_command_line
*
* Purpose: Parse the command line for the h5dumper.
*
* Return: Success:
*
* Failure: Exits program with EXIT_FAILURE value.
*
* Programmer:
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
void
parse_command_line (int argc, const char *argv[])
{
int opt = FALSE;
/* parse command line options */
while ((opt = get_option (argc, argv, s_opts, l_opts)) != EOF)
{
switch ((char) opt)
{
case 'c':
nbytes = strdup (opt_arg);
break;
case '?':
default:
usage (progname);
exit (EXIT_FAILURE);
}
}
if (argc <= opt_ind)
{
error_msg (progname, "missing file name\n");
usage (progname);
exit (EXIT_FAILURE);
}
}
int
main (int argc, const char *argv[])
{
int fd;
unsigned int size;
char *filename;
long res;
char *buf;
parse_command_line (argc, argv);
if (nbytes == NULL)
{
/* missing arg */
error_msg (progname, "missing size\n");
usage (progname);
exit (EXIT_FAILURE);
}
if (argc <= (opt_ind))
{
error_msg (progname, "missing file name\n");
usage (progname);
exit (EXIT_FAILURE);
}
filename = strdup (argv[opt_ind]);
size = 0;
res = sscanf (nbytes, "%u", &size);
if (res == EOF)
{
/* fail */
error_msg (progname, "missing file name\n");
usage (progname);
exit (EXIT_FAILURE);
}
fd = open (filename, O_RDONLY);
if (fd < 0)
{
error_msg (progname, "can't open file %s\n", filename);
exit (EXIT_FAILURE);
}
buf = malloc ((unsigned)(size + 1));
if (buf == NULL)
{
close (fd);
exit (EXIT_FAILURE);
}
res = read (fd, buf, (unsigned)size);
if (res < size)
{
if (buf)
free (buf);
close (fd);
exit (EXIT_FAILURE);
}
write (1, buf, (unsigned)size);
if (buf)
free (buf);
close (fd);
return (EXIT_SUCCESS);
}
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