/* -*- 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; off_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\n"), invoked_name, 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\n"), invoked_name, 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; if (((total_slices + 999) / 1000) > progress_interval) progress_interval = ((total_slices + 999) / 1000); 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\n"), invoked_name, 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\n"), invoked_name, 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) { #ifdef ENABLE_LIBDEFLATE crc = libdeflate_adler32((uint32_t)crc, buffer, (size_t)length); #else crc = adler32((uLong)crc, (Bytef *)buffer, (uInt)length); #endif } /* * 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) { #if defined(PRINTF_LL_MODIFIER) fprintf(stderr, _("%4.1f%% done (%llu / %llu bytes)\n"), (double) (i + 1) * 100.0 / (double) total_slices, (unsigned long long) total_length, (unsigned long long) in_zio.file_size); #elif defined(PRINTF_I64_MODIFIER) fprintf(stderr, _("%4.1f%% done (%I64u / %I64u bytes)\n"), (double) (i + 1) * 100.0 / (double) total_slices, (unsigned __int64) total_length, (unsigned __int64) in_zio.file_size); #else 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); #endif fflush(stderr); } } /* * Output the result unless quiet mode. */ if (!ebzip_quiet_flag) { #if defined(PRINTF_LL_MODIFIER) fprintf(stderr, _("completed (%llu / %llu bytes)\n"), (unsigned long long) in_zio.file_size, (unsigned long long) in_zio.file_size); #elif defined(PRINTF_I64_MODIFIER) fprintf(stderr, _("completed (%I64u / %I64u bytes)\n"), (unsigned __int64) in_zio.file_size, (unsigned __int64) in_zio.file_size); #else fprintf(stderr, _("%lu -> %lu bytes\n\n"), (unsigned long) in_status.st_size, (unsigned long) total_length); #endif 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_files_add(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); }