/* * Copyright (c) 2013 Vojtech Horky * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup untar * @{ */ /** @file */ #include <errno.h> #include <stdio.h> #include <stdarg.h> #include <untar.h> typedef struct { const char *filename; FILE *file; } tar_state_t; static int tar_open(tar_file_t *tar) { tar_state_t *state = (tar_state_t *) tar->data; state->file = fopen(state->filename, "rb"); if (state->file == NULL) return errno; return EOK; } static void tar_close(tar_file_t *tar) { tar_state_t *state = (tar_state_t *) tar->data; fclose(state->file); } static size_t tar_read(tar_file_t *tar, void *data, size_t size) { tar_state_t *state = (tar_state_t *) tar->data; return fread(data, 1, size, state->file); } static void tar_vreport(tar_file_t *tar, const char *fmt, va_list args) { vfprintf(stderr, fmt, args); } tar_file_t tar = { .open = tar_open, .close = tar_close, .read = tar_read, .vreport = tar_vreport }; int main(int argc, char *argv[]) { if (argc != 2) { fprintf(stderr, "Usage: %s tar-file\n", argv[0]); return 1; } tar_state_t state; state.filename = argv[1]; tar.data = (void *) &state; return untar(&tar); } /** @} */