/* -*- 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 "ebutils.h"
/*
* 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 void trap(int signal_number);
/*
* Copy a file.
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
int
ebzip_copy_file(const char *out_file_name, const char *in_file_name)
{
unsigned char buffer[EB_SIZE_PAGE];
size_t total_length;
struct stat in_status, out_status;
int in_file = -1, out_file = -1;
ssize_t in_length;
int progress_interval;
int total_slices;
struct utimbuf utim;
int i;
/*
* Output file name information.
*/
if (!ebzip_quiet_flag) {
fprintf(stderr, _("==> copy %s <==\n"), in_file_name);
fprintf(stderr, _("output to %s\n"), out_file_name);
fflush(stderr);
}
/*
* Check for 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;
}
/*
* When test mode, return immediately.
*/
if (ebzip_test_flag) {
fprintf(stderr, _("completed (%lu / %lu bytes)\n"),
(unsigned long)in_status.st_size,
(unsigned long)in_status.st_size);
fputc('\n', stderr);
fflush(stderr);
return 0;
}
/*
* If the file to be output already exists, confirm and unlink it.
*/
if (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;
}
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.
*/
in_file = open(in_file_name, O_RDONLY | O_BINARY);
if (in_file < 0) {
fprintf(stderr, _("%s: failed to open the file, %s: %s\n"),
invoked_name, strerror(errno), in_file_name);
goto failed;
}
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 data from the input file, compress the data, and then
* write them to the output file.
*/
total_length = 0;
total_slices = (in_status.st_size + EB_SIZE_PAGE - 1) / EB_SIZE_PAGE;
progress_interval = EBZIP_PROGRESS_INTERVAL_FACTOR;
for (i = 0; i < total_slices; i++) {
/*
* Read data from `in_file', and write them to `out_file'.
*/
in_length = read(in_file, buffer, EB_SIZE_PAGE);
if (in_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 (in_length == 0) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
} else if (in_length != EB_SIZE_PAGE
&& total_length + in_length != in_status.st_size) {
fprintf(stderr, _("%s: unexpected EOF: %s\n"),
invoked_name, in_file_name);
goto failed;
}
/*
* Write decoded data to `out_file'.
*/
if (write(out_file, buffer, in_length) != in_length) {
fprintf(stderr, _("%s: failed to write to the file, %s: %s\n"),
invoked_name, strerror(errno), out_file_name);
goto failed;
}
total_length += in_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_status.st_size);
fflush(stderr);
}
}
/*
* Output the result unless quiet mode.
*/
if (!ebzip_quiet_flag) {
fprintf(stderr, _("completed (%lu / %lu bytes)\n"),
(unsigned long)total_length, (unsigned long)in_status.st_size);
fputc('\n', stderr);
fflush(stderr);
}
/*
* Close files.
*/
close(in_file);
in_file = -1;
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
/*
* Delete an original file unless the keep flag is set.
*/
if (!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'.
*/
utim.actime = in_status.st_atime;
utim.modtime = in_status.st_mtime;
utime(out_file_name, &utim);
return 0;
/*
* An error occurs...
*/
failed:
if (0 <= in_file)
close(in_file);
if (0 <= out_file)
close(out_file);
fputc('\n', stderr);
fflush(stderr);
return -1;
}
/*
* Copy all files in a directory.
* If it succeeds, 0 is returned. Otherwise -1 is returned.
*/
int
ebzip_copy_files_in_directory(const char *out_directory_name,
const char *in_directory_name)
{
struct dirent *entry;
DIR *dir = NULL;
struct stat in_status;
char in_path_name[PATH_MAX + 1];
char out_path_name[PATH_MAX + 1];
/*
* Check for the input directory.
*/
if (stat(in_directory_name, &in_status) != 0
|| !S_ISDIR(in_status.st_mode))
return 0;
/*
* Make the output directory if missing.
*/
if (!ebzip_test_flag
&& make_missing_directory(out_directory_name, 0777 ^ get_umask()) < 0)
goto failed;
/*
* Open the directory `path'.
*/
dir = opendir(in_directory_name);
if (dir == NULL) {
fprintf(stderr, _("%s: failed to open the directory, %s: %s\n"),
invoked_name, strerror(errno), in_directory_name);
goto failed;
}
for (;;) {
/*
* Read the directory entry.
*/
entry = readdir(dir);
if (entry == NULL)
break;
eb_compose_path_name(in_directory_name, entry->d_name, in_path_name);
eb_compose_path_name(out_directory_name, entry->d_name, out_path_name);
if (stat(in_path_name, &in_status) != 0
|| !S_ISREG(in_status.st_mode))
continue;
ebzip_copy_file(out_path_name, in_path_name);
}
closedir(dir);
return 0;
/*
* An error occurs...
*/
failed:
if (dir != NULL)
closedir(dir);
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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