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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "H5private.h"
#include "h5tools.h"
#include "h5tools_utils.h"
void parse_command_line(int argc, const char *argv[]);
/* Name of tool */
#define PROGRAM_NAME "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
*-------------------------------------------------------------------------
*/
static void
usage(const char *prog)
{
HDfflush(stdout);
HDfprintf(stdout, "usage: %s -c nb file] \n", prog);
HDfprintf(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.
*-------------------------------------------------------------------------
*/
void
parse_command_line(int argc, const char *argv[])
{
int opt;
/* parse command line options */
while ((opt = get_option(argc, argv, s_opts, l_opts)) != EOF) {
switch ((char)opt) {
case 'c':
nbytes = HDstrdup(opt_arg);
break;
case '?':
default:
usage(h5tools_getprogname());
HDexit(EXIT_FAILURE);
} /* end switch */
} /* end while */
if (argc <= opt_ind) {
error_msg("missing file name\n");
usage(h5tools_getprogname());
HDexit(EXIT_FAILURE);
} /* end if */
} /* end parse_command_line() */
int
main(int argc, const char *argv[])
{
int fd = H5I_INVALID_HID;
unsigned size;
char * filename = NULL;
long res;
char * buf = NULL;
h5tools_setprogname(PROGRAM_NAME);
h5tools_setstatus(EXIT_SUCCESS);
/* Initialize h5tools lib */
h5tools_init();
parse_command_line(argc, argv);
if (NULL == nbytes) {
/* missing arg */
error_msg("missing size\n");
usage(h5tools_getprogname());
goto error;
} /* end if */
if (argc <= (opt_ind)) {
error_msg("missing file name\n");
usage(h5tools_getprogname());
goto error;
} /* end if */
filename = HDstrdup(argv[opt_ind]);
size = 0;
if (EOF == (res = sscanf(nbytes, "%u", &size))) {
/* fail */
error_msg("missing file name\n");
usage(h5tools_getprogname());
goto error;
} /* end if */
if ((fd = HDopen(filename, O_RDONLY, 0)) < 0) {
error_msg("can't open file %s\n", filename);
goto error;
} /* end if */
if (NULL == (buf = (char *)HDmalloc((unsigned)(size + 1)))) {
error_msg("can't allocate buffer \n");
goto error;
} /* end if */
res = HDread(fd, buf, (unsigned)size);
if (res < (long)size) {
error_msg("Bad read \n");
goto error;
} /* end if */
if (HDwrite(1, buf, (unsigned)size) < 0) {
error_msg("Bad write \n");
goto error;
} /* end if */
/* close things and exit */
HDfree(filename);
HDfree(buf);
HDclose(fd);
return EXIT_SUCCESS;
error:
HDfree(filename);
HDfree(buf);
if (fd >= 0)
HDclose(fd);
return EXIT_FAILURE;
} /* end main() */
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