mirror of https://gitee.com/openkylin/hdf5.git
156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "H5private.h"
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#include "h5tools.h"
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#include "h5tools_utils.h"
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void parse_command_line(int argc, const char *argv[]);
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/* Name of tool */
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#define PROGRAM_NAME "getub"
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char *nbytes = NULL;
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static const char *s_opts = "c:"; /* add more later ? */
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static struct long_options l_opts[] = {
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{"c", require_arg, 'c'}, /* input file */
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{NULL, 0, '\0'}
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};
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/*-------------------------------------------------------------------------
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* Function: usage
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*
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* Purpose: Print the usage message
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*
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* Return: void
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*-------------------------------------------------------------------------
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*/
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static void
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usage (const char *prog)
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{
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HDfflush(stdout);
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HDfprintf(stdout, "usage: %s -c nb file] \n", prog);
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HDfprintf(stdout, " print first 'nb' byts of file to stdoug.\n");
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}
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/*-------------------------------------------------------------------------
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* Function: parse_command_line
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*
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* Purpose: Parse the command line for the h5dumper.
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*
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* Return: Success:
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*
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* Failure: Exits program with EXIT_FAILURE value.
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*-------------------------------------------------------------------------
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*/
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void
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parse_command_line(int argc, const char *argv[])
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{
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int opt;
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/* parse command line options */
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while((opt = get_option (argc, argv, s_opts, l_opts)) != EOF) {
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switch((char) opt) {
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case 'c':
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nbytes = HDstrdup(opt_arg);
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break;
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case '?':
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default:
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usage(h5tools_getprogname());
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HDexit(EXIT_FAILURE);
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} /* end switch */
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} /* end while */
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if(argc <= opt_ind) {
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error_msg("missing file name\n");
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usage(h5tools_getprogname());
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HDexit(EXIT_FAILURE);
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} /* end if */
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} /* end parse_command_line() */
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int
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main(int argc, const char *argv[])
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{
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int fd = -1;
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unsigned size;
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char *filename = NULL;
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long res;
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char *buf = NULL;
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h5tools_setprogname(PROGRAM_NAME);
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h5tools_setstatus(EXIT_SUCCESS);
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/* Initialize h5tools lib */
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h5tools_init();
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parse_command_line(argc, argv);
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if(NULL == nbytes) {
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/* missing arg */
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error_msg("missing size\n");
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usage(h5tools_getprogname());
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goto error;
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} /* end if */
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if(argc <= (opt_ind)) {
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error_msg("missing file name\n");
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usage(h5tools_getprogname());
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goto error;
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} /* end if */
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filename = HDstrdup(argv[opt_ind]);
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size = 0;
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if(EOF == (res = sscanf(nbytes, "%u", &size))) {
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/* fail */
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error_msg("missing file name\n");
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usage(h5tools_getprogname());
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goto error;
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} /* end if */
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if((fd = HDopen(filename, O_RDONLY, 0)) < 0) {
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error_msg("can't open file %s\n", filename);
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goto error;
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} /* end if */
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if(NULL == (buf = (char *)HDmalloc((unsigned)(size + 1)))) {
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error_msg("can't allocate buffer \n");
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goto error;
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} /* end if */
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res = HDread(fd, buf, (unsigned)size);
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if(res < (long)size) {
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error_msg("Bad read \n");
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goto error;
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} /* end if */
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if(HDwrite(1, buf, (unsigned)size) < 0) {
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error_msg("Bad write \n");
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goto error;
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} /* end if */
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/* close things and exit */
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HDfree(buf);
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HDclose(fd);
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return EXIT_SUCCESS;
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error:
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if(buf)
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HDfree(buf);
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if(fd > -1)
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HDclose(fd);
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return EXIT_FAILURE;
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} /* end main() */
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