/* -*- C -*-
* Copyright (c) 1998-2006 Motoyuki Kasahara
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
*/
#include "ebzip.h"
#include "getumask.h"
#include "makedir.h"
#include "samefile.h"
#include "yesno.h"
/*
* Tricks for gettext.
*/
#ifdef ENABLE_NLS
#define _(string) gettext(string)
#ifdef gettext_noop
#define N_(string) gettext_noop(string)
#else
#define N_(string) (string)
#endif
#else
#define _(string) (string)
#define N_(string) (string)
#endif
/*
* File name to be deleted and file to be closed when signal is received.
*/
static const char *trap_file_name = NULL;
static int trap_file = -1;
/*
* Unexported function.
*/
static int ebzip_unzip_file_internal(const char *out_file_name,
const char *in_file_name, Zio_Code in_zio_code, int index_page);
static void trap(int signal_number);
/*
* Uncompress a file `in_file_name'.
* For START file, use ebzip_unzip_start_file() instead.
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
int
ebzip_unzip_file(const char *out_file_name, const char *in_file_name,
Zio_Code in_zio_code)
{
return ebzip_unzip_file_internal(out_file_name, in_file_name,
in_zio_code, 0);
}
/*
* Uncompress START file `in_file_name'.
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
int
ebzip_unzip_start_file(const char *out_file_name, const char *in_file_name,
Zio_Code in_zio_code, int index_page)
{
return ebzip_unzip_file_internal(out_file_name, in_file_name,
in_zio_code, index_page);
}
/*
* Internal function for ebzip_unzip_file() and ebzip_unzip_sebxa_start().
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
static int
ebzip_unzip_file_internal(const char *out_file_name, const char *in_file_name,
Zio_Code in_zio_code, int index_page)
{
Zio in_zio;
unsigned char *buffer = NULL;
size_t total_length;
int out_file = -1;
ssize_t length;
struct stat in_status, out_status;
unsigned int crc = 1;
int progress_interval;
int total_slices;
int i;
zio_initialize(&in_zio);
/*
* Simply copy a file, when an input file is not compressed.
*/
if (in_zio_code == ZIO_PLAIN)
return ebzip_copy_file(out_file_name, in_file_name);
/*
* Output file name information.
*/
if (!ebzip_quiet_flag) {
fprintf(stderr, _("==> uncompress %s <==\n"), in_file_name);
fprintf(stderr, _("output to %s\n"), out_file_name);
fflush(stderr);
}
/*
* Get status of the input file.
*/
if (stat(in_file_name, &in_status) < 0 || !S_ISREG(in_status.st_mode)) {
fprintf(stderr, _("%s: no such file: %s\n"), invoked_name,
in_file_name);
goto failed;
}
/*
* Do nothing if the `in_file_name' and `out_file_name' are the same.
*/
if (is_same_file(out_file_name, in_file_name)) {
if (!ebzip_quiet_flag) {
fprintf(stderr,
_("the input and output files are the same, skipped.\n\n"));
fflush(stderr);
}
return 0;
}
/*
* Allocate memories for in/out buffers.
*/
buffer = (unsigned char *)malloc(EB_SIZE_PAGE << ZIO_MAX_EBZIP_LEVEL);
if (buffer == NULL) {
fprintf(stderr, _("%s: memory exhausted\n"), invoked_name);
goto failed;
}
/*
* If the file `out_file_name' already exists, confirm and unlink it.
*/
if (!ebzip_test_flag
&& stat(out_file_name, &out_status) == 0
&& S_ISREG(out_status.st_mode)) {
if (ebzip_overwrite_mode == EBZIP_OVERWRITE_NO) {
if (!ebzip_quiet_flag) {
fputs(_("already exists, skip the file\n\n"), stderr);
fflush(stderr);
}
return 0;
} else if (ebzip_overwrite_mode == EBZIP_OVERWRITE_CONFIRM) {
int y_or_n;
fprintf(stderr, _("\nthe file already exists: %s\n"),
out_file_name);
y_or_n = query_y_or_n(_("do you wish to overwrite (y or n)? "));
fputc('\n', stderr);
fflush(stderr);
if (!y_or_n)
return 0;
}
if (unlink(out_file_name) < 0) {
fprintf(stderr, _("%s: failed to unlink the file: %s\n"),
invoked_name, out_file_name);
goto failed;
}
}
/*
* Open files.
*/
if (zio_open(&in_zio, in_file_name, in_zio_code) < 0) {
fprintf(stderr, _("%s: failed to open the file, %s: %s\n"),
invoked_name, strerror(errno), in_file_name);
goto failed;
}
if (in_zio_code == ZIO_SEBXA) {
off_t index_location;
off_t index_base;
off_t zio_start_location;
off_t zio_end_location;
if (get_sebxa_indexes(in_file_name, index_page, &index_location,
&index_base, &zio_start_location, &zio_end_location) < 0) {
goto failed;
}
zio_set_sebxa_mode(&in_zio, index_location, index_base,
zio_start_location, zio_end_location);
}
if (!ebzip_test_flag) {
trap_file_name = out_file_name;
#ifdef SIGHUP
signal(SIGHUP, trap);
#endif
signal(SIGINT, trap);
#ifdef SIGQUIT
signal(SIGQUIT, trap);
#endif
#ifdef SIGTERM
signal(SIGTERM, trap);
#endif
#ifdef O_CREAT
out_file = open(out_file_name, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY,
0666 ^ get_umask());
#else
out_file = creat(out_file_name, 0666 ^ get_umask());
#endif
if (out_file < 0) {
fprintf(stderr, _("%s: failed to open the file, %s: %s\n"),
invoked_name, strerror(errno), out_file_name);
goto failed;
}
trap_file = out_file;
}
/*
* Read a slice from the input file, uncompress it if required,
* and then write it to the output file.
*/
total_length = 0;
total_slices = (in_zio.file_size + in_zio.slice_size - 1)
/ in_zio.slice_size;
progress_interval = EBZIP_PROGRESS_INTERVAL_FACTOR;
for (i = 0; i < total_slices; i++) {
/*
* Read a slice.
*/
if (zio_lseek(&in_zio, total_length, SEEK_SET) < 0) {
fprintf(stderr, _("%s: failed to seek the file, %s: %s\n"),
invoked_name, strerror(errno), in_file_name);
goto failed;
}
length = zio_read(&in_zio, (char *)buffer, in_zio.slice_size);
if (length < 0) {
fprintf(stderr, _("%s: failed to read from the file, %s: %s\n"),
invoked_name, strerror(errno), in_file_name);
goto failed;
} else if (length == 0) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
} else if (length != in_zio.slice_size
&& total_length + length != in_zio.file_size) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
}
/*
* Update CRC. (Calculate adler32 again.)
*/
if (in_zio.code == ZIO_EBZIP1)
crc = adler32((uLong)crc, (Bytef *)buffer, (uInt)length);
/*
* Write the slice to `out_file'.
*/
if (!ebzip_test_flag) {
if (write(out_file, buffer, length) != length) {
fprintf(stderr, _("%s: failed to write to the file, %s: %s\n"),
invoked_name, strerror(errno), out_file_name);
goto failed;
}
}
total_length += length;
/*
* Output status information unless `quiet' mode.
*/
if (!ebzip_quiet_flag && (i + 1) % progress_interval == 0) {
fprintf(stderr, _("%4.1f%% done (%lu / %lu bytes)\n"),
(double)(i + 1) * 100.0 / (double)total_slices,
(unsigned long)total_length, (unsigned long)in_zio.file_size);
fflush(stderr);
}
}
/*
* Output the result unless quiet mode.
*/
if (!ebzip_quiet_flag) {
fprintf(stderr, _("completed (%lu / %lu bytes)\n"),
(unsigned long)in_zio.file_size, (unsigned long)in_zio.file_size);
fprintf(stderr, _("%lu -> %lu bytes\n\n"),
(unsigned long)in_status.st_size, (unsigned long)total_length);
fflush(stderr);
}
/*
* Close files.
*/
zio_close(&in_zio);
zio_finalize(&in_zio);
if (!ebzip_test_flag) {
close(out_file);
out_file = -1;
trap_file = -1;
trap_file_name = NULL;
#ifdef SIGHUP
signal(SIGHUP, SIG_DFL);
#endif
signal(SIGINT, SIG_DFL);
#ifdef SIGQUIT
signal(SIGQUIT, SIG_DFL);
#endif
#ifdef SIGTERM
signal(SIGTERM, SIG_DFL);
#endif
}
/*
* Check for CRC.
*/
if (in_zio.code == ZIO_EBZIP1 && in_zio.crc != crc) {
fprintf(stderr, _("%s: CRC error: %s\n"), invoked_name, out_file_name);
goto failed;
}
/*
* Delete an original file unless the keep flag is set.
*/
if (!ebzip_test_flag && !ebzip_keep_flag && unlink(in_file_name) < 0) {
if (!ebzip_quiet_flag) {
fprintf(stderr, _("%s: warning: failed to unlink the file: %s\n"),
invoked_name, in_file_name);
}
}
/*
* Set owner, group, permission, atime and mtime of `out_file'.
* We ignore return values of `chown', `chmod' and `utime'.
*/
if (!ebzip_test_flag) {
struct utimbuf utim;
utim.actime = in_status.st_atime;
utim.modtime = in_status.st_mtime;
utime(out_file_name, &utim);
}
/*
* Dispose memories.
*/
free(buffer);
return 0;
/*
* An error occurs...
*/
failed:
if (buffer != NULL)
free(buffer);
zio_close(&in_zio);
zio_finalize(&in_zio);
if (0 <= out_file) {
close(out_file);
trap_file = -1;
trap_file_name = NULL;
#ifdef SIGHUP
signal(SIGHUP, SIG_DFL);
#endif
signal(SIGINT, SIG_DFL);
#ifdef SIGQUIT
signal(SIGQUIT, SIG_DFL);
#endif
#ifdef SIGTERM
signal(SIGTERM, SIG_DFL);
#endif
}
fputc('\n', stderr);
fflush(stderr);
return -1;
}
/*
* Signal handler.
*/
static void
trap(int signal_number)
{
if (0 <= trap_file)
close(trap_file);
if (trap_file_name != NULL)
unlink(trap_file_name);
exit(1);
}
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