1.1 --- a/dstest_pipe_client.cc Thu Apr 01 00:39:16 2021 +0200
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,121 +0,0 @@
1.4 -/*
1.5 - * Test pipe operations.
1.6 - *
1.7 - * Copyright (C) 2020, 2021 Paul Boddie <paul@boddie.org.uk>
1.8 - *
1.9 - * This program is free software; you can redistribute it and/or
1.10 - * modify it under the terms of the GNU General Public License as
1.11 - * published by the Free Software Foundation; either version 2 of
1.12 - * the License, or (at your option) any later version.
1.13 - *
1.14 - * This program is distributed in the hope that it will be useful,
1.15 - * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 - * GNU General Public License for more details.
1.18 - *
1.19 - * You should have received a copy of the GNU General Public License
1.20 - * along with this program; if not, write to the Free Software
1.21 - * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 - * Boston, MA 02110-1301, USA
1.23 - */
1.24 -
1.25 -#include <l4/re/env.h>
1.26 -#include <l4/sys/err.h>
1.27 -
1.28 -#include <stdio.h>
1.29 -#include <string.h>
1.30 -#include <stdlib.h>
1.31 -
1.32 -#include "file.h"
1.33 -#include "memory_utils.h"
1.34 -
1.35 -
1.36 -
1.37 -static void show(file_t *file, offset_t step, offset_t sample)
1.38 -{
1.39 - /* Allocate a buffer for sampling from the file. */
1.40 -
1.41 - char buf[sample + 1];
1.42 -
1.43 - for (offset_t offset = 0; offset < file_populated_span(file); offset += step)
1.44 - {
1.45 - printf("show %ld of %ld...\n", offset, file_populated_span(file));
1.46 -
1.47 - unsigned long remaining = file_populated_span(file) - offset;
1.48 - unsigned long sample_remaining = remaining < sample ? remaining : sample;
1.49 -
1.50 - printf("%ld bytes from %p...\n", sample_remaining, (file->memory + offset));
1.51 - strncpy(buf, (file->memory + offset), sample_remaining);
1.52 - buf[sample_remaining] = '\0';
1.53 - printf("%s\n", buf);
1.54 - }
1.55 -}
1.56 -
1.57 -
1.58 -
1.59 -const unsigned int PIPE_PAGES = 2;
1.60 -
1.61 -int main(void)
1.62 -{
1.63 - /* Obtain access to the filesystem. */
1.64 -
1.65 - l4_cap_idx_t server = l4re_env_get_cap("server");
1.66 -
1.67 - /* Invoke the open method to receive the file reference. */
1.68 -
1.69 - file_t reader, writer;
1.70 - long err = pipe_open(page(PIPE_PAGES), &reader, &writer, server);
1.71 -
1.72 - if (err)
1.73 - {
1.74 - printf("Could not obtain pipe: %s\n", l4sys_errtostr(err));
1.75 - return 1;
1.76 - }
1.77 -
1.78 - /* Use the writer to fill the pipe with data. */
1.79 -
1.80 - for (int region = 0; region < 3; region++)
1.81 - {
1.82 - printf("Write %ld to pipe at %p...\n", file_span(&writer), writer.memory);
1.83 -
1.84 - memset(writer.memory, (int) 'a' + region, file_span(&writer));
1.85 -
1.86 - err = pipe_written(&writer, file_span(&writer));
1.87 -
1.88 - if (err)
1.89 - {
1.90 - printf("Written data error: %s\n", l4sys_errtostr(err));
1.91 - return 1;
1.92 - }
1.93 -
1.94 - show(&writer, page(1), 60);
1.95 -
1.96 - err = pipe_next(&writer);
1.97 -
1.98 - if (err)
1.99 - {
1.100 - printf("Region traversal error at region %d: %s\n", region, l4sys_errtostr(err));
1.101 - break;
1.102 - }
1.103 - }
1.104 -
1.105 - /* Use the reader to obtain data from the pipe. */
1.106 -
1.107 - err = pipe_current(&reader);
1.108 -
1.109 - while (!err)
1.110 - {
1.111 - printf("show...\n");
1.112 - show(&reader, page(1), 60);
1.113 - err = pipe_next(&reader);
1.114 - }
1.115 -
1.116 - if (err)
1.117 - printf("Reading termination condition: %s\n", l4sys_errtostr(err));
1.118 -
1.119 - printf("Data shown.\n");
1.120 -
1.121 - return 0;
1.122 -}
1.123 -
1.124 -// vim: tabstop=2 expandtab shiftwidth=2