484 lines
12 KiB
C
484 lines
12 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* All rights reserved.
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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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* in this position and unchanged.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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struct shar {
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int dump;
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int end_of_line;
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struct archive_entry *entry;
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int has_data;
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char *last_dir;
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char outbuff[1024];
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size_t outbytes;
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size_t outpos;
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int uuavail;
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char uubuffer[3];
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int wrote_header;
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char *work;
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size_t work_len;
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};
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static int archive_write_shar_finish(struct archive *);
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static int archive_write_shar_header(struct archive *,
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struct archive_entry *);
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static int archive_write_shar_data_sed(struct archive *,
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const void * buff, size_t);
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static int archive_write_shar_data_uuencode(struct archive *,
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const void * buff, size_t);
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static int archive_write_shar_finish_entry(struct archive *);
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static int shar_printf(struct archive *, const char *fmt, ...);
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static void uuencode_group(struct shar *);
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static int
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shar_printf(struct archive *a, const char *fmt, ...)
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{
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struct shar *shar;
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va_list ap;
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int required;
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int ret;
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shar = a->format_data;
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if (shar->work_len <= 0) {
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shar->work_len = 1024;
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shar->work = malloc(shar->work_len);
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}
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va_start(ap, fmt);
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required = vsnprintf(shar->work, shar->work_len, fmt, ap);
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if ((size_t)required >= shar->work_len) {
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shar->work_len = required + 256;
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realloc(shar->work, shar->work_len);
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required = vsnprintf(shar->work, shar->work_len, fmt, ap);
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}
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ret = ((a->compression_write)(a, shar->work, strlen(shar->work)));
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va_end(ap);
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return (ret);
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}
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/*
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* Set output format to 'shar' format.
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*/
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int
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archive_write_set_format_shar(struct archive *a)
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{
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struct shar *shar;
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/* If someone else was already registered, unregister them. */
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if (a->format_finish != NULL)
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(a->format_finish)(a);
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shar = malloc(sizeof(*shar));
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if (shar == NULL) {
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archive_set_error(a, ENOMEM, "Can't allocate shar data");
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return (ARCHIVE_FATAL);
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}
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memset(shar, 0, sizeof(*shar));
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a->format_data = shar;
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a->pad_uncompressed = 0;
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a->format_write_header = archive_write_shar_header;
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a->format_finish = archive_write_shar_finish;
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a->format_write_data = archive_write_shar_data_sed;
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a->format_finish_entry = archive_write_shar_finish_entry;
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a->archive_format = ARCHIVE_FORMAT_SHAR_BASE;
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a->archive_format_name = "shar";
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return (ARCHIVE_OK);
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}
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/*
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* An alternate 'shar' that uses uudecode instead of 'sed' to encode
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* file contents and can therefore be used to archive binary files.
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* In addition, this variant also attempts to restore ownership, file modes,
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* and other extended file information.
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*/
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int
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archive_write_set_format_shar_dump(struct archive *a)
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{
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struct shar *shar;
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archive_write_set_format_shar(a);
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shar = a->format_data;
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shar->dump = 1;
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a->format_write_data = archive_write_shar_data_uuencode;
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a->archive_format = ARCHIVE_FORMAT_SHAR_DUMP;
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a->archive_format_name = "shar dump";
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return (ARCHIVE_OK);
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}
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static int
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archive_write_shar_header(struct archive *a, struct archive_entry *entry)
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{
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const char *linkname;
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const char *name;
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char *p, *pp;
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struct shar *shar;
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const struct stat *st;
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shar = a->format_data;
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if (!shar->wrote_header) {
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shar_printf(a, "#!/bin/sh\n");
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shar_printf(a, "# This is a shell archive\n");
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shar->wrote_header = 1;
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}
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/* Save the entry for the closing. */
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if (shar->entry)
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archive_entry_free(shar->entry);
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shar->entry = archive_entry_clone(entry);
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name = archive_entry_pathname(entry);
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st = archive_entry_stat(entry);
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/* Handle some preparatory issues. */
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switch(st->st_mode & S_IFMT) {
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case S_IFREG:
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/* Only regular files have non-zero size. */
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break;
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case S_IFDIR:
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archive_entry_set_size(entry, 0);
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/* Don't bother trying to recreate '.' */
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if (strcmp(name, ".") == 0 || strcmp(name, "./") == 0)
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return (ARCHIVE_OK);
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break;
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case S_IFIFO:
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case S_IFCHR:
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case S_IFBLK:
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/* All other file types have zero size in the archive. */
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archive_entry_set_size(entry, 0);
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break;
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default:
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archive_entry_set_size(entry, 0);
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if (archive_entry_hardlink(entry) == NULL &&
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archive_entry_symlink(entry) == NULL) {
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archive_set_error(a, ARCHIVE_ERRNO_MISC,
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"shar format cannot archive this");
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return (ARCHIVE_WARN);
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}
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}
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/* Stock preparation for all file types. */
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shar_printf(a, "echo x %s\n", name);
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if (!S_ISDIR(st->st_mode)) {
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/* Try to create the dir. */
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p = strdup(name);
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pp = strrchr(p, '/');
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/* If there is a / character, try to create the dir. */
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if (pp != NULL) {
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*pp = '\0';
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/* Try to avoid a lot of redundant mkdir commands. */
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if (strcmp(p, ".") == 0) {
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/* Don't try to "mkdir ." */
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} else if (shar->last_dir == NULL) {
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shar_printf(a,
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"mkdir -p %s > /dev/null 2>&1\n", p);
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shar->last_dir = p;
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} else if (strcmp(p, shar->last_dir) == 0) {
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/* We've already created this exact dir. */
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free(p);
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} else if (strlen(p) < strlen(shar->last_dir) &&
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strncmp(p, shar->last_dir, strlen(p)) == 0) {
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/* We've already created a subdir. */
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free(p);
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} else {
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shar_printf(a,
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"mkdir -p %s > /dev/null 2>&1\n", p);
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free(shar->last_dir);
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shar->last_dir = p;
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}
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}
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}
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/* Handle file-type specific issues. */
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shar->has_data = 0;
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if ((linkname = archive_entry_hardlink(entry)) != NULL)
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shar_printf(a, "ln -f %s %s\n", linkname, name);
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else if ((linkname = archive_entry_symlink(entry)) != NULL)
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shar_printf(a, "ln -fs %s %s\n", linkname, name);
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else {
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switch(st->st_mode & S_IFMT) {
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case S_IFREG:
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if (archive_entry_size(entry) == 0)
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shar_printf(a, "touch %s\n", name);
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else {
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if (shar->dump) {
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shar_printf(a,
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"uudecode -o %s << 'SHAR_END'\n",
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name);
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shar_printf(a, "begin %o %s\n",
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archive_entry_mode(entry) & 0777,
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name);
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} else
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shar_printf(a,
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"sed 's/^X//' > %s << 'SHAR_END'\n",
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name);
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shar->has_data = 1;
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shar->end_of_line = 1;
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shar->outpos = 0;
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shar->outbytes = 0;
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}
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break;
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case S_IFDIR:
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shar_printf(a, "mkdir -p %s > /dev/null 2>&1\n", name);
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/* Record that we just created this directory. */
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if (shar->last_dir != NULL)
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free(shar->last_dir);
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shar->last_dir = strdup(name);
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/* Trim a trailing '/'. */
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pp = strrchr(shar->last_dir, '/');
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if (pp != NULL && pp[1] == '\0')
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*pp = '\0';
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/*
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* TODO: Put dir name/mode on a list to be fixed
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* up at end of archive.
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*/
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break;
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case S_IFIFO:
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shar_printf(a, "mkfifo %s\n", name);
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break;
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case S_IFCHR:
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shar_printf(a, "mknod %s c %d %d\n", name,
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archive_entry_devmajor(entry),
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archive_entry_devminor(entry));
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break;
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case S_IFBLK:
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shar_printf(a, "mknod %s b %d %d\n", name,
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archive_entry_devmajor(entry),
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archive_entry_devminor(entry));
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break;
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default:
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return (ARCHIVE_WARN);
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}
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}
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return (ARCHIVE_OK);
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}
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/* XXX TODO: This could be more efficient XXX */
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static int
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archive_write_shar_data_sed(struct archive *a, const void *buff, size_t length)
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{
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struct shar *shar;
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const char *src;
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size_t n;
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shar = a->format_data;
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if (!shar->has_data)
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return (0);
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src = buff;
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n = length;
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shar->outpos = 0;
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while (n-- > 0) {
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if (shar->end_of_line) {
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shar->outbuff[shar->outpos++] = 'X';
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shar->end_of_line = 0;
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}
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if (*src == '\n')
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shar->end_of_line = 1;
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shar->outbuff[shar->outpos++] = *src++;
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if (shar->outpos > sizeof(shar->outbuff) - 2) {
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(a->compression_write)(a, shar->outbuff, shar->outpos);
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shar->outpos = 0;
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}
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}
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if (shar->outpos > 0)
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(a->compression_write)(a, shar->outbuff, shar->outpos);
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return (length);
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}
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#define UUENC(c) (((c)!=0) ? ((c) & 077) + ' ': '`')
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/* XXX This could be a lot more efficient. XXX */
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static void
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uuencode_group(struct shar *shar)
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{
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int t;
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t = 0;
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if (shar->uuavail > 0)
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t = 0xff0000 & (shar->uubuffer[0] << 16);
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if (shar->uuavail > 1)
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t |= 0x00ff00 & (shar->uubuffer[1] << 8);
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if (shar->uuavail > 2)
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t |= 0x0000ff & (shar->uubuffer[2]);
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shar->outbuff[shar->outpos++] = UUENC( 0x3f & (t>>18) );
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shar->outbuff[shar->outpos++] = UUENC( 0x3f & (t>>12) );
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shar->outbuff[shar->outpos++] = UUENC( 0x3f & (t>>6) );
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shar->outbuff[shar->outpos++] = UUENC( 0x3f & (t) );
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shar->uuavail = 0;
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shar->outbytes += shar->uuavail;
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shar->outbuff[shar->outpos] = 0;
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}
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static int
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archive_write_shar_data_uuencode(struct archive *a, const void *buff,
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size_t length)
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{
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struct shar *shar;
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const char *src;
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size_t n;
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shar = a->format_data;
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if (!shar->has_data)
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return (ARCHIVE_OK);
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src = buff;
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n = length;
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while (n-- > 0) {
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if (shar->uuavail == 3)
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uuencode_group(shar);
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if (shar->outpos >= 60) {
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shar_printf(a, "%c%s\n", UUENC(shar->outbytes),
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shar->outbuff);
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shar->outpos = 0;
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shar->outbytes = 0;
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}
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shar->uubuffer[shar->uuavail++] = *src++;
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shar->outbytes++;
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}
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return (length);
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}
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static int
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archive_write_shar_finish_entry(struct archive *a)
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{
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const char *g, *p, *u;
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struct shar *shar;
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shar = a->format_data;
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if (shar->entry == NULL)
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return (0);
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if (shar->dump) {
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/* Finish uuencoded data. */
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if (shar->has_data) {
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if (shar->uuavail > 0)
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uuencode_group(shar);
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if (shar->outpos > 0) {
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shar_printf(a, "%c%s\n", UUENC(shar->outbytes),
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shar->outbuff);
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shar->outpos = 0;
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shar->uuavail = 0;
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shar->outbytes = 0;
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}
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shar_printf(a, "%c\n", UUENC(0));
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shar_printf(a, "end\n", UUENC(0));
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shar_printf(a, "SHAR_END\n");
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}
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/* Restore file mode, owner, flags. */
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/*
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* TODO: Don't immediately restore mode for
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* directories; defer that to end of script.
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*/
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shar_printf(a, "chmod %o %s\n",
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archive_entry_mode(shar->entry) & 07777,
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archive_entry_pathname(shar->entry));
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u = archive_entry_uname(shar->entry);
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g = archive_entry_gname(shar->entry);
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if (u != NULL || g != NULL) {
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shar_printf(a, "chown %s%s%s %s\n",
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(u != NULL) ? u : "",
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(g != NULL) ? ":" : "", (g != NULL) ? g : "",
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archive_entry_pathname(shar->entry));
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}
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if ((p = archive_entry_fflags_text(shar->entry)) != NULL) {
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shar_printf(a, "chflags %s %s\n", p,
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archive_entry_pathname(shar->entry));
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}
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/* TODO: restore ACLs */
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} else {
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if (shar->has_data) {
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/* Finish sed-encoded data: ensure last line ends. */
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if (!shar->end_of_line)
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shar_printf(a, "\n");
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shar_printf(a, "SHAR_END\n");
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}
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}
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archive_entry_free(shar->entry);
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shar->entry = NULL;
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return (0);
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}
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static int
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archive_write_shar_finish(struct archive *a)
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{
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struct shar *shar;
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/*
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* TODO: Accumulate list of directory names/modes and
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* fix them all up at end-of-archive.
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*/
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shar = a->format_data;
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/*
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* Only write the end-of-archive markers if the archive was
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* actually started. This avoids problems if someone sets
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* shar format, then sets another format (which would invoke
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* shar_finish to free the format-specific data).
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*/
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if (shar->wrote_header) {
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shar_printf(a, "exit\n");
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/* Shar output is never padded. */
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archive_write_set_bytes_in_last_block(a, 1);
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/*
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* TODO: shar should also suppress padding of
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* uncompressed data within gzip/bzip2 streams.
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*/
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}
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if (shar->entry != NULL)
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archive_entry_free(shar->entry);
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if (shar->last_dir != NULL)
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free(shar->last_dir);
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if (shar->work != NULL)
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free(shar->work);
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free(shar);
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a->format_data = NULL;
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return (ARCHIVE_OK);
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}
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