440 lines
11 KiB
C
440 lines
11 KiB
C
/* -*- C -*-
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* Copyright (c) 1998-2006 Motoyuki Kasahara
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "ebzip.h"
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#include "getumask.h"
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#include "makedir.h"
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#include "samefile.h"
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#include "yesno.h"
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/*
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* Tricks for gettext.
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*/
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#ifdef ENABLE_NLS
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#define _(string) gettext(string)
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#ifdef gettext_noop
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#define N_(string) gettext_noop(string)
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#else
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#define N_(string) (string)
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#endif
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#else
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#define _(string) (string)
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#define N_(string) (string)
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#endif
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/*
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* File name to be deleted and file to be closed when signal is received.
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*/
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static const char *trap_file_name = NULL;
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static int trap_file = -1;
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/*
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* Unexported function.
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*/
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static int ebzip_unzip_file_internal(const char *out_file_name,
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const char *in_file_name, Zio_Code in_zio_code, int index_page);
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static void trap(int signal_number);
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/*
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* Uncompress a file `in_file_name'.
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* For START file, use ebzip_unzip_start_file() instead.
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* If it succeeds, 0 is returned. Otherwise -1 is returned.
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*/
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int
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ebzip_unzip_file(const char *out_file_name, const char *in_file_name,
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Zio_Code in_zio_code)
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{
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return ebzip_unzip_file_internal(out_file_name, in_file_name,
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in_zio_code, 0);
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}
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/*
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* Uncompress START file `in_file_name'.
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* If it succeeds, 0 is returned. Otherwise -1 is returned.
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*/
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int
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ebzip_unzip_start_file(const char *out_file_name, const char *in_file_name,
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Zio_Code in_zio_code, int index_page)
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{
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return ebzip_unzip_file_internal(out_file_name, in_file_name,
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in_zio_code, index_page);
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}
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/*
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* Internal function for ebzip_unzip_file() and ebzip_unzip_sebxa_start().
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* If it succeeds, 0 is returned. Otherwise -1 is returned.
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*/
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static int
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ebzip_unzip_file_internal(const char *out_file_name, const char *in_file_name,
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Zio_Code in_zio_code, int index_page)
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{
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Zio in_zio;
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unsigned char *buffer = NULL;
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off_t total_length;
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int out_file = -1;
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ssize_t length;
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struct stat in_status, out_status;
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unsigned int crc = 1;
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int progress_interval;
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int total_slices;
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int i;
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zio_initialize(&in_zio);
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/*
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* Simply copy a file, when an input file is not compressed.
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*/
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if (in_zio_code == ZIO_PLAIN)
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return ebzip_copy_file(out_file_name, in_file_name);
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/*
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* Output file name information.
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*/
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if (!ebzip_quiet_flag) {
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fprintf(stderr, _("==> uncompress %s <==\n"), in_file_name);
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fprintf(stderr, _("output to %s\n"), out_file_name);
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fflush(stderr);
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}
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/*
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* Get status of the input file.
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*/
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if (stat(in_file_name, &in_status) < 0 || !S_ISREG(in_status.st_mode)) {
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fprintf(stderr, _("%s: no such file: %s\n"), invoked_name,
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in_file_name);
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goto failed;
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}
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/*
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* Do nothing if the `in_file_name' and `out_file_name' are the same.
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*/
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if (is_same_file(out_file_name, in_file_name)) {
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if (!ebzip_quiet_flag) {
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fprintf(stderr,
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_("the input and output files are the same, skipped.\n\n"));
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fflush(stderr);
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}
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return 0;
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}
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/*
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* Allocate memories for in/out buffers.
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*/
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buffer = (unsigned char *)malloc(EB_SIZE_PAGE << ZIO_MAX_EBZIP_LEVEL);
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if (buffer == NULL) {
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fprintf(stderr, _("%s: memory exhausted\n"), invoked_name);
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goto failed;
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}
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/*
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* If the file `out_file_name' already exists, confirm and unlink it.
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*/
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if (!ebzip_test_flag
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&& stat(out_file_name, &out_status) == 0
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&& S_ISREG(out_status.st_mode)) {
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if (ebzip_overwrite_mode == EBZIP_OVERWRITE_NO) {
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if (!ebzip_quiet_flag) {
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fputs(_("already exists, skip the file\n\n"), stderr);
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fflush(stderr);
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}
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return 0;
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} else if (ebzip_overwrite_mode == EBZIP_OVERWRITE_CONFIRM) {
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int y_or_n;
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fprintf(stderr, _("\nthe file already exists: %s\n"),
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out_file_name);
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y_or_n = query_y_or_n(_("do you wish to overwrite (y or n)? "));
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fputc('\n', stderr);
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fflush(stderr);
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if (!y_or_n)
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return 0;
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}
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if (unlink(out_file_name) < 0) {
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fprintf(stderr, _("%s: failed to unlink the file: %s\n"),
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invoked_name, out_file_name);
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goto failed;
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}
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}
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/*
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* Open files.
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*/
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if (zio_open(&in_zio, in_file_name, in_zio_code) < 0) {
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fprintf(stderr, _("%s: failed to open the file: %s\n"),
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invoked_name, in_file_name);
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goto failed;
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}
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if (in_zio_code == ZIO_SEBXA) {
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off_t index_location;
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off_t index_base;
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off_t zio_start_location;
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off_t zio_end_location;
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if (get_sebxa_indexes(in_file_name, index_page, &index_location,
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&index_base, &zio_start_location, &zio_end_location) < 0) {
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goto failed;
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}
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zio_set_sebxa_mode(&in_zio, index_location, index_base,
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zio_start_location, zio_end_location);
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}
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if (!ebzip_test_flag) {
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trap_file_name = out_file_name;
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#ifdef SIGHUP
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signal(SIGHUP, trap);
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#endif
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signal(SIGINT, trap);
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#ifdef SIGQUIT
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signal(SIGQUIT, trap);
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#endif
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#ifdef SIGTERM
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signal(SIGTERM, trap);
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#endif
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#ifdef O_CREAT
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out_file = open(out_file_name, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY,
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0666 ^ get_umask());
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#else
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out_file = creat(out_file_name, 0666 ^ get_umask());
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#endif
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if (out_file < 0) {
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fprintf(stderr, _("%s: failed to open the file: %s\n"),
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invoked_name, out_file_name);
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goto failed;
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}
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trap_file = out_file;
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}
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/*
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* Read a slice from the input file, uncompress it if required,
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* and then write it to the output file.
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*/
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total_length = 0;
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total_slices = (in_zio.file_size + in_zio.slice_size - 1)
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/ in_zio.slice_size;
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progress_interval = EBZIP_PROGRESS_INTERVAL_FACTOR;
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if (((total_slices + 999) / 1000) > progress_interval)
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progress_interval = ((total_slices + 999) / 1000);
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for (i = 0; i < total_slices; i++) {
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/*
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* Read a slice.
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*/
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if (zio_lseek(&in_zio, total_length, SEEK_SET) < 0) {
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fprintf(stderr, _("%s: failed to seek the file: %s\n"),
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invoked_name, in_file_name);
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goto failed;
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}
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length = zio_read(&in_zio, (char *)buffer, in_zio.slice_size);
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if (length < 0) {
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fprintf(stderr, _("%s: failed to read from the file: %s\n"),
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invoked_name, in_file_name);
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goto failed;
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} else if (length == 0) {
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fprintf(stderr, _("%s: unexpected EOF: %s\n"),
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invoked_name, in_file_name);
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goto failed;
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} else if (length != in_zio.slice_size
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&& total_length + length != in_zio.file_size) {
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fprintf(stderr, _("%s: unexpected EOF: %s\n"),
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invoked_name, in_file_name);
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goto failed;
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}
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/*
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* Update CRC. (Calculate adler32 again.)
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*/
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if (in_zio.code == ZIO_EBZIP1) {
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#ifdef ENABLE_LIBDEFLATE
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crc = libdeflate_adler32((uint32_t)crc, buffer, (size_t)length);
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#else
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crc = adler32((uLong)crc, (Bytef *)buffer, (uInt)length);
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#endif
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}
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/*
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* Write the slice to `out_file'.
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*/
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if (!ebzip_test_flag) {
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if (write(out_file, buffer, length) != length) {
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fprintf(stderr, _("%s: failed to write to the file, %s: %s\n"),
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invoked_name, strerror(errno), out_file_name);
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goto failed;
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}
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}
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total_length += length;
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/*
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* Output status information unless `quiet' mode.
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*/
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if (!ebzip_quiet_flag && (i + 1) % progress_interval == 0) {
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#if defined(PRINTF_LL_MODIFIER)
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fprintf(stderr, _("%4.1f%% done (%llu / %llu bytes)\n"),
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(double) (i + 1) * 100.0 / (double) total_slices,
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(unsigned long long) total_length,
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(unsigned long long) in_zio.file_size);
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#elif defined(PRINTF_I64_MODIFIER)
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fprintf(stderr, _("%4.1f%% done (%I64u / %I64u bytes)\n"),
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(double) (i + 1) * 100.0 / (double) total_slices,
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(unsigned __int64) total_length,
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(unsigned __int64) in_zio.file_size);
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#else
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fprintf(stderr, _("%4.1f%% done (%lu / %lu bytes)\n"),
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(double) (i + 1) * 100.0 / (double) total_slices,
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(unsigned long) total_length,
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(unsigned long) in_zio.file_size);
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#endif
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fflush(stderr);
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}
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}
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/*
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* Output the result unless quiet mode.
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*/
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if (!ebzip_quiet_flag) {
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#if defined(PRINTF_LL_MODIFIER)
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fprintf(stderr, _("completed (%llu / %llu bytes)\n"),
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(unsigned long long) in_zio.file_size,
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(unsigned long long) in_zio.file_size);
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#elif defined(PRINTF_I64_MODIFIER)
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fprintf(stderr, _("completed (%I64u / %I64u bytes)\n"),
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(unsigned __int64) in_zio.file_size,
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(unsigned __int64) in_zio.file_size);
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#else
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fprintf(stderr, _("%lu -> %lu bytes\n\n"),
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(unsigned long) in_status.st_size,
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(unsigned long) total_length);
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#endif
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fflush(stderr);
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}
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/*
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* Close files.
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*/
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zio_close(&in_zio);
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zio_finalize(&in_zio);
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if (!ebzip_test_flag) {
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close(out_file);
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out_file = -1;
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trap_file = -1;
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trap_file_name = NULL;
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#ifdef SIGHUP
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signal(SIGHUP, SIG_DFL);
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#endif
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signal(SIGINT, SIG_DFL);
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#ifdef SIGQUIT
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signal(SIGQUIT, SIG_DFL);
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#endif
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#ifdef SIGTERM
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signal(SIGTERM, SIG_DFL);
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#endif
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}
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/*
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* Check for CRC.
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*/
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if (in_zio.code == ZIO_EBZIP1 && in_zio.crc != crc) {
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fprintf(stderr, _("%s: CRC error: %s\n"), invoked_name, out_file_name);
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goto failed;
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}
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/*
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* Delete an original file unless the keep flag is set.
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*/
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if (!ebzip_test_flag && !ebzip_keep_flag)
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unlink_files_add(in_file_name);
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/*
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* Set owner, group, permission, atime and mtime of `out_file'.
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* We ignore return values of `chown', `chmod' and `utime'.
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*/
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if (!ebzip_test_flag) {
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struct utimbuf utim;
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utim.actime = in_status.st_atime;
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utim.modtime = in_status.st_mtime;
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utime(out_file_name, &utim);
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}
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/*
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* Dispose memories.
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*/
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free(buffer);
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return 0;
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/*
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* An error occurs...
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*/
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failed:
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if (buffer != NULL)
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free(buffer);
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zio_close(&in_zio);
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zio_finalize(&in_zio);
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if (0 <= out_file) {
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close(out_file);
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trap_file = -1;
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trap_file_name = NULL;
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#ifdef SIGHUP
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signal(SIGHUP, SIG_DFL);
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#endif
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signal(SIGINT, SIG_DFL);
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#ifdef SIGQUIT
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signal(SIGQUIT, SIG_DFL);
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#endif
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#ifdef SIGTERM
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signal(SIGTERM, SIG_DFL);
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#endif
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}
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fputc('\n', stderr);
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fflush(stderr);
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return -1;
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}
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/*
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* Signal handler.
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*/
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static void
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trap(int signal_number)
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{
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if (0 <= trap_file)
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close(trap_file);
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if (trap_file_name != NULL)
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unlink(trap_file_name);
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exit(1);
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}
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