| paul@158 | 1 | /* |
| paul@160 | 2 | * Test directory reading operations. |
| paul@158 | 3 | * |
| paul@160 | 4 | * Copyright (C) 2020, 2021 Paul Boddie <paul@boddie.org.uk> |
| paul@158 | 5 | * |
| paul@158 | 6 | * This program is free software; you can redistribute it and/or |
| paul@158 | 7 | * modify it under the terms of the GNU General Public License as |
| paul@158 | 8 | * published by the Free Software Foundation; either version 2 of |
| paul@158 | 9 | * the License, or (at your option) any later version. |
| paul@158 | 10 | * |
| paul@158 | 11 | * This program is distributed in the hope that it will be useful, |
| paul@158 | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| paul@158 | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| paul@158 | 14 | * GNU General Public License for more details. |
| paul@158 | 15 | * |
| paul@158 | 16 | * You should have received a copy of the GNU General Public License |
| paul@158 | 17 | * along with this program; if not, write to the Free Software |
| paul@158 | 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| paul@158 | 19 | * Boston, MA 02110-1301, USA |
| paul@158 | 20 | */ |
| paul@158 | 21 | |
| paul@160 | 22 | #include <l4/re/env.h> |
| paul@160 | 23 | #include <l4/sys/err.h> |
| paul@160 | 24 | |
| paul@158 | 25 | #include <dirent.h> |
| paul@158 | 26 | #include <stdio.h> |
| paul@160 | 27 | #include <string.h> |
| paul@160 | 28 | #include <stdlib.h> |
| paul@160 | 29 | |
| paul@160 | 30 | #include <fsclient/client.h> |
| paul@160 | 31 | #include <systypes/fcntl.h> |
| paul@158 | 32 | |
| paul@158 | 33 | |
| paul@158 | 34 | |
| paul@160 | 35 | #define DIRENT_CORE_SIZE (sizeof(struct dirent) - sizeof(((struct dirent *) 0)->d_name)) |
| paul@160 | 36 | |
| paul@158 | 37 | int main(int argc, char *argv[]) |
| paul@158 | 38 | { |
| paul@158 | 39 | if (argc < 2) |
| paul@158 | 40 | { |
| paul@160 | 41 | printf("Need a directory name and an optional user identifier (if used with a filesystem).\n"); |
| paul@160 | 42 | return 1; |
| paul@160 | 43 | } |
| paul@160 | 44 | |
| paul@160 | 45 | char *filename = argv[1]; |
| paul@160 | 46 | bool have_uid = (argc > 2) && strlen(argv[2]); |
| paul@160 | 47 | sys_uid_t uid = have_uid ? atoi(argv[2]) : 0; |
| paul@160 | 48 | file_t *file; |
| paul@160 | 49 | |
| paul@160 | 50 | /* With a user, open a user-specific file opener. */ |
| paul@160 | 51 | |
| paul@160 | 52 | if (have_uid) |
| paul@160 | 53 | { |
| paul@160 | 54 | l4_cap_idx_t opener = client_open_for_user((user_t) {uid, uid, 0022}); |
| paul@160 | 55 | |
| paul@160 | 56 | if (l4_is_invalid_cap(opener)) |
| paul@160 | 57 | { |
| paul@160 | 58 | printf("Could not obtain opener for file.\n"); |
| paul@160 | 59 | return 1; |
| paul@160 | 60 | } |
| paul@160 | 61 | |
| paul@160 | 62 | /* Invoke the open method to receive the file reference. */ |
| paul@160 | 63 | |
| paul@160 | 64 | file = client_open_using(filename, O_DIRECTORY, opener); |
| paul@160 | 65 | } |
| paul@160 | 66 | else |
| paul@160 | 67 | { |
| paul@160 | 68 | file = client_open(filename, O_DIRECTORY); |
| paul@160 | 69 | } |
| paul@160 | 70 | |
| paul@160 | 71 | if (file == NULL) |
| paul@160 | 72 | { |
| paul@160 | 73 | printf("Could not obtain directory.\n"); |
| paul@158 | 74 | return 1; |
| paul@158 | 75 | } |
| paul@158 | 76 | |
| paul@160 | 77 | // NOTE: To be replaced by a proper mechanism identifying the nature of each |
| paul@160 | 78 | // NOTE: obtained object. |
| paul@160 | 79 | |
| paul@160 | 80 | file->can_mmap = 0; |
| paul@160 | 81 | file->has_size = 0; |
| paul@158 | 82 | |
| paul@160 | 83 | /* Register the reader for notification. */ |
| paul@160 | 84 | |
| paul@160 | 85 | long err = client_set_blocking(file, NOTIFY_CONTENT_AVAILABLE); |
| paul@158 | 86 | |
| paul@160 | 87 | if (err) |
| paul@158 | 88 | { |
| paul@160 | 89 | printf("Could not subscribe to notifications: %s\n", l4sys_errtostr(err)); |
| paul@158 | 90 | return 1; |
| paul@158 | 91 | } |
| paul@158 | 92 | |
| paul@160 | 93 | char buffer[DIRENT_CORE_SIZE]; |
| paul@160 | 94 | offset_t nread = client_read(file, buffer, DIRENT_CORE_SIZE); |
| paul@160 | 95 | offset_t total = 0; |
| paul@160 | 96 | |
| paul@160 | 97 | while (nread) |
| paul@160 | 98 | { |
| paul@160 | 99 | total += nread; |
| paul@160 | 100 | |
| paul@160 | 101 | if (total == DIRENT_CORE_SIZE) |
| paul@160 | 102 | { |
| paul@160 | 103 | struct dirent *dirent = (struct dirent *) buffer; |
| paul@160 | 104 | int remaining = dirent->d_reclen - DIRENT_CORE_SIZE; |
| paul@160 | 105 | char entry[DIRENT_CORE_SIZE + remaining], *current; |
| paul@160 | 106 | |
| paul@160 | 107 | memcpy(entry, buffer, DIRENT_CORE_SIZE); |
| paul@160 | 108 | current = entry + DIRENT_CORE_SIZE; |
| paul@158 | 109 | |
| paul@160 | 110 | do |
| paul@160 | 111 | { |
| paul@160 | 112 | nread = client_read(file, current, remaining); |
| paul@160 | 113 | remaining -= nread; |
| paul@160 | 114 | current += nread; |
| paul@160 | 115 | } |
| paul@160 | 116 | while (nread && remaining); |
| paul@160 | 117 | |
| paul@160 | 118 | if (remaining) |
| paul@160 | 119 | break; |
| paul@160 | 120 | |
| paul@160 | 121 | dirent = (struct dirent *) entry; |
| paul@160 | 122 | printf("> %s\n", dirent->d_name); |
| paul@160 | 123 | |
| paul@160 | 124 | total = 0; |
| paul@160 | 125 | } |
| paul@160 | 126 | |
| paul@160 | 127 | nread = client_read(file, buffer, DIRENT_CORE_SIZE); |
| paul@160 | 128 | } |
| paul@158 | 129 | |
| paul@158 | 130 | printf("Directory shown.\n"); |
| paul@158 | 131 | |
| paul@158 | 132 | return 0; |
| paul@158 | 133 | } |
| paul@158 | 134 | |
| paul@158 | 135 | // vim: tabstop=2 expandtab shiftwidth=2 |
