/** * apr tutorial sample code * http://dev.ariel-networks.com/apr/ */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <stdio.h>#include <stdlib.h>#include <assert.h>#include <apr_general.h>#include <apr_file_io.h>/* default buffer size */#define BUFSIZE			4096static apr_status_t copy_file(const char *src_fname, const char *dest_fname, apr_pool_t *mp);/** * file copy sample code * @remark Error checks omitted */int main(int argc, const char *argv[]){    apr_status_t rv;    apr_pool_t *mp;            if (argc < 3) {        printf("usage %s copy-src-filename copy-dest-filename\n", argv[0]);        return 0;    }    apr_initialize();    apr_pool_create(&mp, NULL);    rv = copy_file(argv[1], argv[2], mp);    if (rv != APR_SUCCESS) {        goto error;    }    apr_pool_destroy(mp);    apr_terminate();    return 0; error:    {        char errbuf[256];        apr_strerror(rv, errbuf, sizeof(errbuf));        printf("error: %d, %s\n", rv, errbuf);    }    apr_terminate();    return -1;}static apr_status_t copy_file(const char *src_fname, const char *dest_fname, apr_pool_t *mp){    apr_status_t rv;    apr_file_t *src_fp = NULL;    apr_file_t *dest_fp = NULL;            /* open the file. in other words, create apr_file_t object */    /* @remark after apr-1.1.0, use APR_FOPEN_READ for third argument */    if ((rv = apr_file_open(&src_fp, src_fname, APR_READ|APR_BINARY, APR_OS_DEFAULT, mp)) != APR_SUCCESS) {        goto done;    }    if ((rv = apr_file_open(&dest_fp, dest_fname, APR_CREATE|APR_WRITE|APR_BINARY, APR_OS_DEFAULT, mp)) != APR_SUCCESS) {        goto done;    }    while (1) {        char buf[BUFSIZE];        apr_size_t len = sizeof(buf);        rv = apr_file_read(src_fp, buf, &len);        if (rv != APR_SUCCESS) {            break;        }        rv = apr_file_write(dest_fp, buf, &len);        if (rv != APR_SUCCESS) {            break;        }    } done:    if (src_fp) {        apr_file_close(src_fp);    }    if (dest_fp) {        apr_file_close(dest_fp);    }    return rv;}