IFC to populate initial libarchive-portable tree.

SVN-Revision: 1

1 files changed, 546 insertions, 0 deletions

diff --git a/libarchive/archive_write_set_format_ar.c b/libarchive/archive_write_set_format_ar.c
new file mode 100644
index 00000000..313d0b39
--- /dev/null
+++ b/libarchive/archive_write_set_format_ar.c
@@ -0,0 +1,546 @@
+/*-
+ * Copyright (c) 2007 Kai Wang
+ * Copyright (c) 2007 Tim Kientzle
+ * 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
+ *    in this position and unchanged.
+ * 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: src/lib/libarchive/archive_write_set_format_ar.c,v 1.6 2008/03/15 11:04:45 kientzle Exp $");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "archive.h"
+#include "archive_entry.h"
+#include "archive_private.h"
+#include "archive_write_private.h"
+
+struct ar_w {
+	uint64_t	 entry_bytes_remaining;
+	uint64_t	 entry_padding;
+	int		 is_strtab;
+	int		 has_strtab;
+	char		*strtab;
+};
+
+/*
+ * Define structure of the "ar" header.
+ */
+#define AR_name_offset 0
+#define AR_name_size 16
+#define AR_date_offset 16
+#define AR_date_size 12
+#define AR_uid_offset 28
+#define AR_uid_size 6
+#define AR_gid_offset 34
+#define AR_gid_size 6
+#define AR_mode_offset 40
+#define AR_mode_size 8
+#define AR_size_offset 48
+#define AR_size_size 10
+#define AR_fmag_offset 58
+#define AR_fmag_size 2
+
+static int		 archive_write_set_format_ar(struct archive_write *);
+static int		 archive_write_ar_header(struct archive_write *,
+			     struct archive_entry *);
+static ssize_t		 archive_write_ar_data(struct archive_write *,
+			     const void *buff, size_t s);
+static int		 archive_write_ar_destroy(struct archive_write *);
+static int		 archive_write_ar_finish(struct archive_write *);
+static int		 archive_write_ar_finish_entry(struct archive_write *);
+static const char	*ar_basename(const char *path);
+static int		 format_octal(int64_t v, char *p, int s);
+static int		 format_decimal(int64_t v, char *p, int s);
+
+int
+archive_write_set_format_ar_bsd(struct archive *_a)
+{
+	struct archive_write *a = (struct archive_write *)_a;
+	int r = archive_write_set_format_ar(a);
+	if (r == ARCHIVE_OK) {
+		a->archive.archive_format = ARCHIVE_FORMAT_AR_BSD;
+		a->archive.archive_format_name = "ar (BSD)";
+	}
+	return (r);
+}
+
+int
+archive_write_set_format_ar_svr4(struct archive *_a)
+{
+	struct archive_write *a = (struct archive_write *)_a;
+	int r = archive_write_set_format_ar(a);
+	if (r == ARCHIVE_OK) {
+		a->archive.archive_format = ARCHIVE_FORMAT_AR_GNU;
+		a->archive.archive_format_name = "ar (GNU/SVR4)";
+	}
+	return (r);
+}
+
+/*
+ * Generic initialization.
+ */
+static int
+archive_write_set_format_ar(struct archive_write *a)
+{
+	struct ar_w *ar;
+
+	/* If someone else was already registered, unregister them. */
+	if (a->format_destroy != NULL)
+		(a->format_destroy)(a);
+
+	ar = (struct ar_w *)malloc(sizeof(*ar));
+	if (ar == NULL) {
+		archive_set_error(&a->archive, ENOMEM, "Can't allocate ar data");
+		return (ARCHIVE_FATAL);
+	}
+	memset(ar, 0, sizeof(*ar));
+	a->format_data = ar;
+
+	a->format_write_header = archive_write_ar_header;
+	a->format_write_data = archive_write_ar_data;
+	a->format_finish = archive_write_ar_finish;
+	a->format_destroy = archive_write_ar_destroy;
+	a->format_finish_entry = archive_write_ar_finish_entry;
+	return (ARCHIVE_OK);
+}
+
+static int
+archive_write_ar_header(struct archive_write *a, struct archive_entry *entry)
+{
+	int ret, append_fn;
+	char buff[60];
+	char *ss, *se;
+	struct ar_w *ar;
+	const char *pathname;
+	const char *filename;
+
+	ret = 0;
+	append_fn = 0;
+	ar = (struct ar_w *)a->format_data;
+	ar->is_strtab = 0;
+	filename = NULL;
+
+	/*
+	 * Reject files with empty name.
+	 */
+	pathname = archive_entry_pathname(entry);
+	if (*pathname == '\0') {
+		archive_set_error(&a->archive, EINVAL,
+		    "Invalid filename");
+		return (ARCHIVE_WARN);
+	}
+
+	/*
+	 * If we are now at the beginning of the archive,
+	 * we need first write the ar global header.
+	 */
+	if (a->archive.file_position == 0)
+		(a->compressor.write)(a, "!<arch>\n", 8);
+
+	memset(buff, ' ', 60);
+	strncpy(&buff[AR_fmag_offset], "`\n", 2);
+
+	if (strcmp(pathname, "/") == 0 ) {
+		/* Entry is archive symbol table in GNU format */
+		buff[AR_name_offset] = '/';
+		goto stat;
+	}
+	if (strcmp(pathname, "__.SYMDEF") == 0) {
+		/* Entry is archive symbol table in BSD format */
+		strncpy(buff + AR_name_offset, "__.SYMDEF", 9);
+		goto stat;
+	}
+	if (strcmp(pathname, "//") == 0) {
+		/*
+		 * Entry is archive filename table, inform that we should
+		 * collect strtab in next _data call.
+		 */
+		ar->is_strtab = 1;
+		buff[AR_name_offset] = buff[AR_name_offset + 1] = '/';
+		/*
+		 * For archive string table, only ar_size filed should
+		 * be set.
+		 */
+		goto size;
+	}
+
+	/*
+	 * Otherwise, entry is a normal archive member.
+	 * Strip leading paths from filenames, if any.
+	 */
+	if ((filename = ar_basename(pathname)) == NULL) {
+		/* Reject filenames with trailing "/" */
+		archive_set_error(&a->archive, EINVAL,
+		    "Invalid filename");
+		return (ARCHIVE_WARN);
+	}
+
+	if (a->archive.archive_format == ARCHIVE_FORMAT_AR_GNU) {
+		/*
+		 * SVR4/GNU variant use a "/" to mark then end of the filename,
+		 * make it possible to have embedded spaces in the filename.
+		 * So, the longest filename here (without extension) is
+		 * actually 15 bytes.
+		 */
+		if (strlen(filename) <= 15) {
+			strncpy(&buff[AR_name_offset], 
+			    filename, strlen(filename));
+			buff[AR_name_offset + strlen(filename)] = '/';
+		} else {
+			/*
+			 * For filename longer than 15 bytes, GNU variant
+			 * makes use of a string table and instead stores the
+			 * offset of the real filename to in the ar_name field.
+			 * The string table should have been written before.
+			 */
+			if (ar->has_strtab <= 0) {
+				archive_set_error(&a->archive, EINVAL,
+				    "Can't find string table");
+				return (ARCHIVE_WARN);
+			}
+
+			se = (char *)malloc(strlen(filename) + 3);
+			if (se == NULL) {
+				archive_set_error(&a->archive, ENOMEM,
+				    "Can't allocate filename buffer");
+				return (ARCHIVE_FATAL);
+			}
+
+			strncpy(se, filename, strlen(filename));
+			strcpy(se + strlen(filename), "/\n");
+
+			ss = strstr(ar->strtab, se);
+			free(se);
+
+			if (ss == NULL) {
+				archive_set_error(&a->archive, EINVAL,
+				    "Invalid string table");
+				return (ARCHIVE_WARN);
+			}
+
+			/*
+			 * GNU variant puts "/" followed by digits into
+			 * ar_name field. These digits indicates the real
+			 * filename string's offset to the string table.
+			 */
+			buff[AR_name_offset] = '/';
+			if (format_decimal(ss - ar->strtab,
+			    buff + AR_name_offset + 1,
+			    AR_name_size - 1)) {
+				archive_set_error(&a->archive, ERANGE,
+				    "string table offset too large");
+				return (ARCHIVE_WARN);
+			}
+		}
+	} else if (a->archive.archive_format == ARCHIVE_FORMAT_AR_BSD) {
+		/*
+		 * BSD variant: for any file name which is more than
+		 * 16 chars or contains one or more embedded space(s), the
+		 * string "#1/" followed by the ASCII length of the name is
+		 * put into the ar_name field. The file size (stored in the
+		 * ar_size field) is incremented by the length of the name.
+		 * The name is then written immediately following the
+		 * archive header.
+		 */
+		if (strlen(filename) <= 16 && strchr(filename, ' ') == NULL) {
+			strncpy(&buff[AR_name_offset], filename, strlen(filename));
+			buff[AR_name_offset + strlen(filename)] = ' ';
+		}
+		else {
+			strncpy(buff + AR_name_offset, "#1/", 3);
+			if (format_decimal(strlen(filename),
+			    buff + AR_name_offset + 3,
+			    AR_name_size - 3)) {
+				archive_set_error(&a->archive, ERANGE,
+				    "File name too long");
+				return (ARCHIVE_WARN);
+			}
+			append_fn = 1;
+			archive_entry_set_size(entry,
+			    archive_entry_size(entry) + strlen(filename));
+		}
+	}
+
+stat:
+	if (format_decimal(archive_entry_mtime(entry), buff + AR_date_offset, AR_date_size)) {
+		archive_set_error(&a->archive, ERANGE,
+		    "File modification time too large");
+		return (ARCHIVE_WARN);
+	}
+	if (format_decimal(archive_entry_uid(entry), buff + AR_uid_offset, AR_uid_size)) {
+		archive_set_error(&a->archive, ERANGE,
+		    "Numeric user ID too large");
+		return (ARCHIVE_WARN);
+	}
+	if (format_decimal(archive_entry_gid(entry), buff + AR_gid_offset, AR_gid_size)) {
+		archive_set_error(&a->archive, ERANGE,
+		    "Numeric group ID too large");
+		return (ARCHIVE_WARN);
+	}
+	if (format_octal(archive_entry_mode(entry), buff + AR_mode_offset, AR_mode_size)) {
+		archive_set_error(&a->archive, ERANGE,
+		    "Numeric mode too large");
+		return (ARCHIVE_WARN);
+	}
+	/*
+	 * Sanity Check: A non-pseudo archive member should always be
+	 * a regular file.
+	 */
+	if (filename != NULL && archive_entry_filetype(entry) != AE_IFREG) {
+		archive_set_error(&a->archive, EINVAL,
+		    "Regular file required for non-pseudo member");
+		return (ARCHIVE_WARN);
+	}
+
+size:
+	if (format_decimal(archive_entry_size(entry), buff + AR_size_offset,
+	    AR_size_size)) {
+		archive_set_error(&a->archive, ERANGE,
+		    "File size out of range");
+		return (ARCHIVE_WARN);
+	}
+
+	ret = (a->compressor.write)(a, buff, 60);
+	if (ret != ARCHIVE_OK)
+		return (ret);
+
+	ar->entry_bytes_remaining = archive_entry_size(entry);
+	ar->entry_padding = ar->entry_bytes_remaining % 2;
+
+	if (append_fn > 0) {
+		ret = (a->compressor.write)(a, filename, strlen(filename));
+		if (ret != ARCHIVE_OK)
+			return (ret);
+		ar->entry_bytes_remaining -= strlen(filename);
+	}
+
+	return (ARCHIVE_OK);
+}
+
+static ssize_t
+archive_write_ar_data(struct archive_write *a, const void *buff, size_t s)
+{
+	struct ar_w *ar;
+	int ret;
+
+	ar = (struct ar_w *)a->format_data;
+	if (s > ar->entry_bytes_remaining)
+		s = ar->entry_bytes_remaining;
+
+	if (ar->is_strtab > 0) {
+		if (ar->has_strtab > 0) {
+			archive_set_error(&a->archive, EINVAL,
+			    "More than one string tables exist");
+			return (ARCHIVE_WARN);
+		}
+
+		ar->strtab = (char *)malloc(s);
+		if (ar->strtab == NULL) {
+			archive_set_error(&a->archive, ENOMEM,
+			    "Can't allocate strtab buffer");
+			return (ARCHIVE_FATAL);
+		}
+		strncpy(ar->strtab, buff, s);
+		ar->has_strtab = 1;
+	}
+
+	ret = (a->compressor.write)(a, buff, s);
+	if (ret != ARCHIVE_OK)
+		return (ret);
+
+	ar->entry_bytes_remaining -= s;
+	return (s);
+}
+
+static int
+archive_write_ar_destroy(struct archive_write *a)
+{
+	struct ar_w *ar;
+
+	ar = (struct ar_w *)a->format_data;
+
+	if (ar->has_strtab > 0) {
+		free(ar->strtab);
+		ar->strtab = NULL;
+	}
+
+	free(ar);
+	a->format_data = NULL;
+	return (ARCHIVE_OK);
+}
+
+static int
+archive_write_ar_finish(struct archive_write *a)
+{
+	int ret;
+
+	/*
+	 * If we haven't written anything yet, we need to write
+	 * the ar global header now to make it a valid ar archive.
+	 */
+	if (a->archive.file_position == 0) {
+		ret = (a->compressor.write)(a, "!<arch>\n", 8);
+		return (ret);
+	}
+
+	return (ARCHIVE_OK);
+}
+
+static int
+archive_write_ar_finish_entry(struct archive_write *a)
+{
+	struct ar_w *ar;
+	int ret;
+
+	ar = (struct ar_w *)a->format_data;
+
+	if (ar->entry_bytes_remaining != 0) {
+		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+		    "Entry remaining bytes larger than 0");
+		return (ARCHIVE_WARN);
+	}
+
+	if (ar->entry_padding == 0) {
+		return (ARCHIVE_OK);
+	}
+
+	if (ar->entry_padding != 1) {
+		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+		    "Padding wrong size: %d should be 1 or 0",
+		    ar->entry_padding);
+		return (ARCHIVE_WARN);
+	}
+
+	ret = (a->compressor.write)(a, "\n", 1);
+	return (ret);
+}
+
+/*
+ * Format a number into the specified field using base-8.
+ * NB: This version is slightly different from the one in
+ * _ustar.c
+ */
+static int
+format_octal(int64_t v, char *p, int s)
+{
+	int len;
+	char *h;
+
+	len = s;
+	h = p;
+
+	/* Octal values can't be negative, so use 0. */
+	if (v < 0) {
+		while (len-- > 0)
+			*p++ = '0';
+		return (-1);
+	}
+
+	p += s;		/* Start at the end and work backwards. */
+	do {
+		*--p = (char)('0' + (v & 7));
+		v >>= 3;
+	} while (--s > 0 && v > 0);
+
+	if (v == 0) {
+		memmove(h, p, len - s);
+		p = h + len - s;
+		while (s-- > 0)
+			*p++ = ' ';
+		return (0);
+	}
+	/* If it overflowed, fill field with max value. */
+	while (len-- > 0)
+		*p++ = '7';
+
+	return (-1);
+}
+
+/*
+ * Format a number into the specified field using base-10.
+ */
+static int
+format_decimal(int64_t v, char *p, int s)
+{
+	int len;
+	char *h;
+
+	len = s;
+	h = p;
+
+	/* Negative values in ar header are meaningless , so use 0. */
+	if (v < 0) {
+		while (len-- > 0)
+			*p++ = '0';
+		return (-1);
+	}
+
+	p += s;
+	do {
+		*--p = (char)('0' + (v % 10));
+		v /= 10;
+	} while (--s > 0 && v > 0);
+
+	if (v == 0) {
+		memmove(h, p, len - s);
+		p = h + len - s;
+		while (s-- > 0)
+			*p++ = ' ';
+		return (0);
+	}
+	/* If it overflowed, fill field with max value. */
+	while (len-- > 0)
+		*p++ = '9';
+
+	return (-1);
+}
+
+static const char *
+ar_basename(const char *path)
+{
+	const char *endp, *startp;
+
+	endp = path + strlen(path) - 1;
+	/*
+	 * For filename with trailing slash(es), we return
+	 * NULL indicating an error.
+	 */
+	if (*endp == '/')
+		return (NULL);
+
+	/* Find the start of the base */
+	startp = endp;
+	while (startp > path && *(startp - 1) != '/')
+		startp--;
+	
+	return (startp);
+}