1 files changed, 327 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_write_add_filter_program.c b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_program.c
new file mode 100644
index 0000000000..3dcc9df7bc
--- /dev/null
+++ b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_program.c
@@ -0,0 +1,327 @@
+/*-
+ * Copyright (c) 2007 Joerg Sonnenberger
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "archive_platform.h"
+__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_compression_program.c 201104 2009-12-28 03:14:30Z kientzle $");
+
+#ifdef HAVE_SYS_WAIT_H
+#  include <sys/wait.h>
+#endif
+#ifdef HAVE_ERRNO_H
+#  include <errno.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#  include <fcntl.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#  include <string.h>
+#endif
+
+#include "archive.h"
+#include "archive_private.h"
+#include "archive_write_private.h"
+
+#if ARCHIVE_VERSION_NUMBER < 4000000
+int
+archive_write_set_compression_program(struct archive *a, const char *cmd)
+{
+	__archive_write_filters_free(a);
+	return (archive_write_add_filter_program(a, cmd));
+}
+#endif
+
+/* This capability is only available on POSIX systems. */
+#if (!defined(HAVE_PIPE) || !defined(HAVE_FCNTL) || \
+    !(defined(HAVE_FORK) || defined(HAVE_VFORK))) && (!defined(_WIN32) || defined(__CYGWIN__))
+
+/*
+ * On non-Posix systems, allow the program to build, but choke if
+ * this function is actually invoked.
+ */
+int
+archive_write_add_filter_program(struct archive *_a, const char *cmd)
+{
+	archive_set_error(_a, -1,
+	    "External compression programs not supported on this platform");
+	return (ARCHIVE_FATAL);
+}
+
+#else
+
+#include "filter_fork.h"
+
+struct private_data {
+	char		*cmd;
+	char		*description;
+	pid_t		 child;
+	int		 child_stdin, child_stdout;
+
+	char		*child_buf;
+	size_t		 child_buf_len, child_buf_avail;
+};
+
+static int archive_compressor_program_open(struct archive_write_filter *);
+static int archive_compressor_program_write(struct archive_write_filter *,
+		    const void *, size_t);
+static int archive_compressor_program_close(struct archive_write_filter *);
+static int archive_compressor_program_free(struct archive_write_filter *);
+
+/*
+ * Add a filter to this write handle that passes all data through an
+ * external program.
+ */
+int
+archive_write_add_filter_program(struct archive *_a, const char *cmd)
+{
+	struct archive_write_filter *f = __archive_write_allocate_filter(_a);
+	struct archive_write *a = (struct archive_write *)_a;
+	struct private_data *data;
+	static const char *prefix = "Program: ";
+	archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
+	    ARCHIVE_STATE_NEW, "archive_write_add_filter_program");
+	data = calloc(1, sizeof(*data));
+	if (data == NULL) {
+		archive_set_error(&a->archive, ENOMEM, "Out of memory");
+		return (ARCHIVE_FATAL);
+	}
+	data->cmd = strdup(cmd);
+	data->description = (char *)malloc(strlen(prefix) + strlen(cmd) + 1);
+	strcpy(data->description, prefix);
+	strcat(data->description, cmd);
+
+	f->name = data->description;
+	f->data = data;
+	f->open = &archive_compressor_program_open;
+	f->code = ARCHIVE_COMPRESSION_PROGRAM;
+	return (ARCHIVE_OK);
+}
+
+/*
+ * Setup callback.
+ */
+static int
+archive_compressor_program_open(struct archive_write_filter *f)
+{
+	struct private_data *data = (struct private_data *)f->data;
+	int ret;
+
+	ret = __archive_write_open_filter(f->next_filter);
+	if (ret != ARCHIVE_OK)
+		return (ret);
+
+	if (data->child_buf == NULL) {
+		data->child_buf_len = 65536;
+		data->child_buf_avail = 0;
+		data->child_buf = malloc(data->child_buf_len);
+
+		if (data->child_buf == NULL) {
+			archive_set_error(f->archive, ENOMEM,
+			    "Can't allocate compression buffer");
+			return (ARCHIVE_FATAL);
+		}
+	}
+
+	if ((data->child = __archive_create_child(data->cmd,
+		 &data->child_stdin, &data->child_stdout)) == -1) {
+		archive_set_error(f->archive, EINVAL,
+		    "Can't initialise filter");
+		return (ARCHIVE_FATAL);
+	}
+
+	f->write = archive_compressor_program_write;
+	f->close = archive_compressor_program_close;
+	f->free = archive_compressor_program_free;
+	return (0);
+}
+
+static ssize_t
+child_write(struct archive_write_filter *f, const char *buf, size_t buf_len)
+{
+	struct private_data *data = f->data;
+	ssize_t ret;
+
+	if (data->child_stdin == -1)
+		return (-1);
+
+	if (buf_len == 0)
+		return (-1);
+
+restart_write:
+	do {
+		ret = write(data->child_stdin, buf, buf_len);
+	} while (ret == -1 && errno == EINTR);
+
+	if (ret > 0)
+		return (ret);
+	if (ret == 0) {
+		close(data->child_stdin);
+		data->child_stdin = -1;
+		fcntl(data->child_stdout, F_SETFL, 0);
+		return (0);
+	}
+	if (ret == -1 && errno != EAGAIN)
+		return (-1);
+
+	if (data->child_stdout == -1) {
+		fcntl(data->child_stdin, F_SETFL, 0);
+		__archive_check_child(data->child_stdin, data->child_stdout);
+		goto restart_write;
+	}
+
+	do {
+		ret = read(data->child_stdout,
+		    data->child_buf + data->child_buf_avail,
+		    data->child_buf_len - data->child_buf_avail);
+	} while (ret == -1 && errno == EINTR);
+
+	if (ret == 0 || (ret == -1 && errno == EPIPE)) {
+		close(data->child_stdout);
+		data->child_stdout = -1;
+		fcntl(data->child_stdin, F_SETFL, 0);
+		goto restart_write;
+	}
+	if (ret == -1 && errno == EAGAIN) {
+		__archive_check_child(data->child_stdin, data->child_stdout);
+		goto restart_write;
+	}
+	if (ret == -1)
+		return (-1);
+
+	data->child_buf_avail += ret;
+
+	ret = __archive_write_filter(f->next_filter,
+	    data->child_buf, data->child_buf_avail);
+	if (ret <= 0)
+		return (-1);
+
+	if ((size_t)ret < data->child_buf_avail) {
+		memmove(data->child_buf, data->child_buf + ret,
+		    data->child_buf_avail - ret);
+	}
+	data->child_buf_avail -= ret;
+	goto restart_write;
+}
+
+/*
+ * Write data to the compressed stream.
+ */
+static int
+archive_compressor_program_write(struct archive_write_filter *f,
+    const void *buff, size_t length)
+{
+	ssize_t ret;
+	const char *buf;
+
+	buf = buff;
+	while (length > 0) {
+		ret = child_write(f, buf, length);
+		if (ret == -1 || ret == 0) {
+			archive_set_error(f->archive, EIO,
+			    "Can't write to filter");
+			return (ARCHIVE_FATAL);
+		}
+		length -= ret;
+		buf += ret;
+	}
+	return (ARCHIVE_OK);
+}
+
+
+/*
+ * Finish the compression...
+ */
+static int
+archive_compressor_program_close(struct archive_write_filter *f)
+{
+	struct private_data *data = (struct private_data *)f->data;
+	int ret, r1, status;
+	ssize_t bytes_read;
+
+	ret = 0;
+	close(data->child_stdin);
+	data->child_stdin = -1;
+	fcntl(data->child_stdout, F_SETFL, 0);
+
+	for (;;) {
+		do {
+			bytes_read = read(data->child_stdout,
+			    data->child_buf + data->child_buf_avail,
+			    data->child_buf_len - data->child_buf_avail);
+		} while (bytes_read == -1 && errno == EINTR);
+
+		if (bytes_read == 0 || (bytes_read == -1 && errno == EPIPE))
+			break;
+
+		if (bytes_read == -1) {
+			archive_set_error(f->archive, errno,
+			    "Read from filter failed unexpectedly.");
+			ret = ARCHIVE_FATAL;
+			goto cleanup;
+		}
+		data->child_buf_avail += bytes_read;
+
+		ret = __archive_write_filter(f->next_filter,
+		    data->child_buf, data->child_buf_avail);
+		if (ret != ARCHIVE_OK) {
+			ret = ARCHIVE_FATAL;
+			goto cleanup;
+		}
+		data->child_buf_avail = 0;
+	}
+
+cleanup:
+	/* Shut down the child. */
+	if (data->child_stdin != -1)
+		close(data->child_stdin);
+	if (data->child_stdout != -1)
+		close(data->child_stdout);
+	while (waitpid(data->child, &status, 0) == -1 && errno == EINTR)
+		continue;
+
+	if (status != 0) {
+		archive_set_error(f->archive, EIO,
+		    "Filter exited with failure.");
+		ret = ARCHIVE_FATAL;
+	}
+	r1 = __archive_write_close_filter(f->next_filter);
+	return (r1 < ret ? r1 : ret);
+}
+
+static int
+archive_compressor_program_free(struct archive_write_filter *f)
+{
+	struct private_data *data = (struct private_data *)f->data;
+	free(data->cmd);
+	free(data->description);
+	free(data->child_buf);
+	free(data);
+	f->data = NULL;
+	return (ARCHIVE_OK);
+}
+
+#endif /* !defined(HAVE_PIPE) || !defined(HAVE_VFORK) || !defined(HAVE_FCNTL) */