| paul@141 | 1 | /* |
| paul@141 | 2 | * Test file operations. |
| paul@141 | 3 | * |
| paul@237 | 4 | * Copyright (C) 2020, 2021, 2022 Paul Boddie <paul@boddie.org.uk> |
| paul@141 | 5 | * |
| paul@141 | 6 | * This program is free software; you can redistribute it and/or |
| paul@141 | 7 | * modify it under the terms of the GNU General Public License as |
| paul@141 | 8 | * published by the Free Software Foundation; either version 2 of |
| paul@141 | 9 | * the License, or (at your option) any later version. |
| paul@141 | 10 | * |
| paul@141 | 11 | * This program is distributed in the hope that it will be useful, |
| paul@141 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| paul@141 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| paul@141 | 14 | * GNU General Public License for more details. |
| paul@141 | 15 | * |
| paul@141 | 16 | * You should have received a copy of the GNU General Public License |
| paul@141 | 17 | * along with this program; if not, write to the Free Software |
| paul@141 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| paul@141 | 19 | * Boston, MA 02110-1301, USA |
| paul@141 | 20 | */ |
| paul@141 | 21 | |
| paul@141 | 22 | #include <l4/re/env.h> |
| paul@141 | 23 | #include <l4/sys/err.h> |
| paul@141 | 24 | |
| paul@141 | 25 | #include <thread> |
| paul@141 | 26 | |
| paul@141 | 27 | #include <stdio.h> |
| paul@141 | 28 | #include <string.h> |
| paul@141 | 29 | #include <stdlib.h> |
| paul@141 | 30 | |
| paul@141 | 31 | #include <fsclient/client.h> |
| paul@141 | 32 | #include <systypes/fcntl.h> |
| paul@141 | 33 | |
| paul@141 | 34 | |
| paul@141 | 35 | |
| paul@141 | 36 | /* Write data to the file. */ |
| paul@141 | 37 | |
| paul@141 | 38 | static void write_data(file_t *file, int region) |
| paul@141 | 39 | { |
| paul@141 | 40 | offset_t size = 600; |
| paul@141 | 41 | char buffer[size]; |
| paul@141 | 42 | |
| paul@141 | 43 | memset(buffer, (int) 'a' + region, size); |
| paul@141 | 44 | |
| paul@141 | 45 | offset_t nwritten = client_write(file, buffer, size); |
| paul@141 | 46 | |
| paul@141 | 47 | printf("Written %ld/%ld in #%d to file with first %c, last %c...\n", nwritten, size, region, *buffer, *(buffer + nwritten - 1)); |
| paul@141 | 48 | |
| paul@141 | 49 | /* Flush to make the output available. */ |
| paul@141 | 50 | |
| paul@141 | 51 | client_flush(file); |
| paul@141 | 52 | } |
| paul@141 | 53 | |
| paul@141 | 54 | /* Read and write data to the file. */ |
| paul@141 | 55 | |
| paul@141 | 56 | static void read_and_write(file_t *file, bool creator) |
| paul@141 | 57 | { |
| paul@141 | 58 | offset_t size = 600, total = 0; |
| paul@141 | 59 | long err; |
| paul@141 | 60 | int region = 0; |
| paul@141 | 61 | |
| paul@141 | 62 | /* Register for notifications. */ |
| paul@141 | 63 | |
| paul@180 | 64 | if ((err = client_subscribe(file, NOTIFY_CONTENT_AVAILABLE | NOTIFY_PEER_CLOSED, client_notifier_task()))) |
| paul@141 | 65 | { |
| paul@141 | 66 | printf("Could not subscribe to notifications: %s\n", l4sys_errtostr(err)); |
| paul@141 | 67 | return; |
| paul@141 | 68 | } |
| paul@141 | 69 | |
| paul@141 | 70 | /* Seek to the end of the file, if this is not actually a new file. */ |
| paul@141 | 71 | |
| paul@141 | 72 | client_seek(file, 0, SEEK_END); |
| paul@141 | 73 | |
| paul@141 | 74 | printf("File %s at position %ld...\n", creator ? "creator" : "follower", client_tell(file)); |
| paul@141 | 75 | |
| paul@141 | 76 | /* Write initial data as the file's creator. */ |
| paul@141 | 77 | |
| paul@141 | 78 | if (creator) |
| paul@141 | 79 | write_data(file, region++); |
| paul@141 | 80 | |
| paul@141 | 81 | while (region < 26) |
| paul@141 | 82 | { |
| paul@141 | 83 | char buffer[size]; |
| paul@141 | 84 | offset_t nread; |
| paul@141 | 85 | |
| paul@141 | 86 | /* Wait for notification of content. */ |
| paul@141 | 87 | |
| paul@180 | 88 | err = client_wait_file(file, client_notifier_task()); |
| paul@141 | 89 | |
| paul@141 | 90 | if (err) |
| paul@141 | 91 | { |
| paul@141 | 92 | printf("Error waiting for notifications: %s\n", l4sys_errtostr(err)); |
| paul@141 | 93 | return; |
| paul@141 | 94 | } |
| paul@141 | 95 | |
| paul@141 | 96 | printf("File %s notified with conditions:%s%s\n", creator ? "creator" : "follower", |
| paul@141 | 97 | file->notifications & NOTIFY_PEER_CLOSED ? " closed" : "", |
| paul@141 | 98 | file->notifications & NOTIFY_CONTENT_AVAILABLE ? " content" : ""); |
| paul@141 | 99 | |
| paul@141 | 100 | /* Attempt to read. */ |
| paul@141 | 101 | |
| paul@141 | 102 | nread = client_read(file, buffer, size); |
| paul@141 | 103 | |
| paul@141 | 104 | while (nread) |
| paul@141 | 105 | { |
| paul@141 | 106 | total += nread; |
| paul@141 | 107 | |
| paul@141 | 108 | printf("Read as %s %ld/%ld, total %ld, first %c, last %c, from file...\n", creator ? "creator" : "follower", |
| paul@141 | 109 | nread, size, total, *buffer, *(buffer + nread - 1)); |
| paul@141 | 110 | |
| paul@141 | 111 | if (!(*(buffer + nread - 1))) |
| paul@141 | 112 | printf("Warning: length before zero region is %ld\n", strlen(buffer)); |
| paul@141 | 113 | |
| paul@141 | 114 | #if 0 |
| paul@141 | 115 | for (offset_t i = 0; i < nread; i += 60) |
| paul@141 | 116 | { |
| paul@141 | 117 | fwrite(buffer + i, sizeof(char), nread - i > 60 ? 60 : nread - i, stdout); |
| paul@141 | 118 | fputs("\n", stdout); |
| paul@141 | 119 | } |
| paul@141 | 120 | #endif |
| paul@141 | 121 | nread = client_read(file, buffer, size); |
| paul@141 | 122 | } |
| paul@141 | 123 | |
| paul@141 | 124 | /* Without any more content, a peer closed event should terminate reading |
| paul@141 | 125 | from the pipe. */ |
| paul@141 | 126 | |
| paul@141 | 127 | if (file->notifications & NOTIFY_PEER_CLOSED) |
| paul@141 | 128 | break; |
| paul@141 | 129 | |
| paul@141 | 130 | write_data(file, region++); |
| paul@141 | 131 | } |
| paul@141 | 132 | |
| paul@141 | 133 | printf("Data shown.\n"); |
| paul@141 | 134 | } |
| paul@141 | 135 | |
| paul@141 | 136 | int main(int argc, char *argv[]) |
| paul@141 | 137 | { |
| paul@141 | 138 | if (argc < 2) |
| paul@141 | 139 | { |
| paul@237 | 140 | printf("Need a filename.\n"); |
| paul@141 | 141 | return 1; |
| paul@141 | 142 | } |
| paul@141 | 143 | |
| paul@141 | 144 | char *filename = argv[1]; |
| paul@147 | 145 | file_t *file1, *file2; |
| paul@141 | 146 | |
| paul@237 | 147 | file1 = client_open(filename, O_RDWR | O_CREAT); |
| paul@237 | 148 | file2 = client_open(filename, O_RDWR); |
| paul@141 | 149 | |
| paul@141 | 150 | if ((file1 == NULL) || (file2 == NULL)) |
| paul@141 | 151 | { |
| paul@141 | 152 | printf("Could not obtain files.\n"); |
| paul@141 | 153 | return 1; |
| paul@141 | 154 | } |
| paul@141 | 155 | |
| paul@141 | 156 | /* Schedule threads. */ |
| paul@141 | 157 | |
| paul@141 | 158 | std::thread *activities[2]; |
| paul@141 | 159 | |
| paul@141 | 160 | activities[0] = new std::thread(read_and_write, file1, true); |
| paul@141 | 161 | activities[1] = new std::thread(read_and_write, file2, false); |
| paul@141 | 162 | |
| paul@141 | 163 | for (int i = 0; i < 2; i++) |
| paul@141 | 164 | activities[i]->join(); |
| paul@141 | 165 | } |
| paul@141 | 166 | |
| paul@141 | 167 | // vim: tabstop=2 expandtab shiftwidth=2 |
