Initial commitv0.6.36release-0.6.36-dev

1 files changed, 437 insertions, 0 deletions

diff --git a/libarchive/libarchive-2.4.17/tar/util.c b/libarchive/libarchive-2.4.17/tar/util.c
new file mode 100644
index 0000000..68ff8d8
--- /dev/null
+++ b/libarchive/libarchive-2.4.17/tar/util.c
@@ -0,0 +1,437 @@
+/*-
+ * Copyright (c) 2003-2007 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.
+ * 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 "bsdtar_platform.h"
+__FBSDID("$FreeBSD: src/usr.bin/tar/util.c,v 1.18 2008/01/02 00:21:27 kientzle Exp $");
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>  /* Linux doesn't define mode_t, etc. in sys/stat.h. */
+#endif
+#include <ctype.h>
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "bsdtar.h"
+
+static void	bsdtar_vwarnc(struct bsdtar *, int code,
+		    const char *fmt, va_list ap);
+
+/*
+ * Print a string, taking care with any non-printable characters.
+ */
+
+void
+safe_fprintf(FILE *f, const char *fmt, ...)
+{
+	char *buff;
+	char *buff_heap;
+	int buff_length;
+	int length;
+	va_list ap;
+	char *p;
+	unsigned i;
+	char buff_stack[256];
+	char copy_buff[256];
+
+	/* Use a stack-allocated buffer if we can, for speed and safety. */
+	buff_heap = NULL;
+	buff_length = sizeof(buff_stack);
+	buff = buff_stack;
+
+	va_start(ap, fmt);
+	length = vsnprintf(buff, buff_length, fmt, ap);
+	va_end(ap);
+	/* If the result is too large, allocate a buffer on the heap. */
+	if (length >= buff_length) {
+		buff_length = length+1;
+		buff_heap = malloc(buff_length);
+		/* Failsafe: use the truncated string if malloc fails. */
+		if (buff_heap != NULL) {
+			buff = buff_heap;
+			va_start(ap, fmt);
+			length = vsnprintf(buff, buff_length, fmt, ap);
+			va_end(ap);
+		}
+	}
+
+	/* Write data, expanding unprintable characters. */
+	p = buff;
+	i = 0;
+	while (*p != '\0') {
+		unsigned char c = *p++;
+
+		if (isprint(c) && c != '\\')
+			copy_buff[i++] = c;
+		else {
+			copy_buff[i++] = '\\';
+			switch (c) {
+			case '\a': copy_buff[i++] = 'a'; break;
+			case '\b': copy_buff[i++] = 'b'; break;
+			case '\f': copy_buff[i++] = 'f'; break;
+			case '\n': copy_buff[i++] = 'n'; break;
+#if '\r' != '\n'
+			/* On some platforms, \n and \r are the same. */
+			case '\r': copy_buff[i++] = 'r'; break;
+#endif
+			case '\t': copy_buff[i++] = 't'; break;
+			case '\v': copy_buff[i++] = 'v'; break;
+			case '\\': copy_buff[i++] = '\\'; break;
+			default:
+				sprintf(copy_buff + i, "%03o", c);
+				i += 3;
+			}
+		}
+
+		/* If our temp buffer is full, dump it and keep going. */
+		if (i > (sizeof(copy_buff) - 8)) {
+			copy_buff[i++] = '\0';
+			fprintf(f, "%s", copy_buff);
+			i = 0;
+		}
+	}
+	copy_buff[i++] = '\0';
+	fprintf(f, "%s", copy_buff);
+
+	/* If we allocated a heap-based buffer, free it now. */
+	if (buff_heap != NULL)
+		free(buff_heap);
+}
+
+static void
+bsdtar_vwarnc(struct bsdtar *bsdtar, int code, const char *fmt, va_list ap)
+{
+	fprintf(stderr, "%s: ", bsdtar->progname);
+	vfprintf(stderr, fmt, ap);
+	if (code != 0)
+		fprintf(stderr, ": %s", strerror(code));
+	fprintf(stderr, "\n");
+}
+
+void
+bsdtar_warnc(struct bsdtar *bsdtar, int code, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	bsdtar_vwarnc(bsdtar, code, fmt, ap);
+	va_end(ap);
+}
+
+void
+bsdtar_errc(struct bsdtar *bsdtar, int eval, int code, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	bsdtar_vwarnc(bsdtar, code, fmt, ap);
+	va_end(ap);
+	exit(eval);
+}
+
+int
+yes(const char *fmt, ...)
+{
+	char buff[32];
+	char *p;
+	ssize_t l;
+
+	va_list ap;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	fprintf(stderr, " (y/N)? ");
+	fflush(stderr);
+
+	l = read(2, buff, sizeof(buff));
+	if (l <= 0)
+		return (0);
+	buff[l] = 0;
+
+	for (p = buff; *p != '\0'; p++) {
+		if (isspace(0xff & (int)*p))
+			continue;
+		switch(*p) {
+		case 'y': case 'Y':
+			return (1);
+		case 'n': case 'N':
+			return (0);
+		default:
+			return (0);
+		}
+	}
+
+	return (0);
+}
+
+/*
+ * Read lines from file and do something with each one.  If option_null
+ * is set, lines are terminated with zero bytes; otherwise, they're
+ * terminated with newlines.
+ *
+ * This uses a self-sizing buffer to handle arbitrarily-long lines.
+ * If the "process" function returns non-zero for any line, this
+ * function will return non-zero after attempting to process all
+ * remaining lines.
+ */
+int
+process_lines(struct bsdtar *bsdtar, const char *pathname,
+    int (*process)(struct bsdtar *, const char *))
+{
+	FILE *f;
+	char *buff, *buff_end, *line_start, *line_end, *p;
+	size_t buff_length, bytes_read, bytes_wanted;
+	int separator;
+	int ret;
+
+	separator = bsdtar->option_null ? '\0' : '\n';
+	ret = 0;
+
+	if (strcmp(pathname, "-") == 0)
+		f = stdin;
+	else
+		f = fopen(pathname, "r");
+	if (f == NULL)
+		bsdtar_errc(bsdtar, 1, errno, "Couldn't open %s", pathname);
+	buff_length = 8192;
+	buff = malloc(buff_length);
+	if (buff == NULL)
+		bsdtar_errc(bsdtar, 1, ENOMEM, "Can't read %s", pathname);
+	line_start = line_end = buff_end = buff;
+	for (;;) {
+		/* Get some more data into the buffer. */
+		bytes_wanted = buff + buff_length - buff_end;
+		bytes_read = fread(buff_end, 1, bytes_wanted, f);
+		buff_end += bytes_read;
+		/* Process all complete lines in the buffer. */
+		while (line_end < buff_end) {
+			if (*line_end == separator) {
+				*line_end = '\0';
+				if ((*process)(bsdtar, line_start) != 0)
+					ret = -1;
+				line_start = line_end + 1;
+				line_end = line_start;
+			} else
+				line_end++;
+		}
+		if (feof(f))
+			break;
+		if (ferror(f))
+			bsdtar_errc(bsdtar, 1, errno,
+			    "Can't read %s", pathname);
+		if (line_start > buff) {
+			/* Move a leftover fractional line to the beginning. */
+			memmove(buff, line_start, buff_end - line_start);
+			buff_end -= line_start - buff;
+			line_end -= line_start - buff;
+			line_start = buff;
+		} else {
+			/* Line is too big; enlarge the buffer. */
+			p = realloc(buff, buff_length *= 2);
+			if (p == NULL)
+				bsdtar_errc(bsdtar, 1, ENOMEM,
+				    "Line too long in %s", pathname);
+			buff_end = p + (buff_end - buff);
+			line_end = p + (line_end - buff);
+			line_start = buff = p;
+		}
+	}
+	/* At end-of-file, handle the final line. */
+	if (line_end > line_start) {
+		*line_end = '\0';
+		if ((*process)(bsdtar, line_start) != 0)
+			ret = -1;
+	}
+	free(buff);
+	if (f != stdin)
+		fclose(f);
+	return (ret);
+}
+
+/*-
+ * The logic here for -C <dir> attempts to avoid
+ * chdir() as long as possible.  For example:
+ * "-C /foo -C /bar file"          needs chdir("/bar") but not chdir("/foo")
+ * "-C /foo -C bar file"           needs chdir("/foo/bar")
+ * "-C /foo -C bar /file1"         does not need chdir()
+ * "-C /foo -C bar /file1 file2"   needs chdir("/foo/bar") before file2
+ *
+ * The only correct way to handle this is to record a "pending" chdir
+ * request and combine multiple requests intelligently until we
+ * need to process a non-absolute file.  set_chdir() adds the new dir
+ * to the pending list; do_chdir() actually executes any pending chdir.
+ *
+ * This way, programs that build tar command lines don't have to worry
+ * about -C with non-existent directories; such requests will only
+ * fail if the directory must be accessed.
+ */
+void
+set_chdir(struct bsdtar *bsdtar, const char *newdir)
+{
+	if (newdir[0] == '/') {
+		/* The -C /foo -C /bar case; dump first one. */
+		free(bsdtar->pending_chdir);
+		bsdtar->pending_chdir = NULL;
+	}
+	if (bsdtar->pending_chdir == NULL)
+		/* Easy case: no previously-saved dir. */
+		bsdtar->pending_chdir = strdup(newdir);
+	else {
+		/* The -C /foo -C bar case; concatenate */
+		char *old_pending = bsdtar->pending_chdir;
+		size_t old_len = strlen(old_pending);
+		bsdtar->pending_chdir = malloc(old_len + strlen(newdir) + 2);
+		if (old_pending[old_len - 1] == '/')
+			old_pending[old_len - 1] = '\0';
+		if (bsdtar->pending_chdir != NULL)
+			sprintf(bsdtar->pending_chdir, "%s/%s",
+			    old_pending, newdir);
+		free(old_pending);
+	}
+	if (bsdtar->pending_chdir == NULL)
+		bsdtar_errc(bsdtar, 1, errno, "No memory");
+}
+
+void
+do_chdir(struct bsdtar *bsdtar)
+{
+	if (bsdtar->pending_chdir == NULL)
+		return;
+
+	if (chdir(bsdtar->pending_chdir) != 0) {
+		bsdtar_errc(bsdtar, 1, 0, "could not chdir to '%s'\n",
+		    bsdtar->pending_chdir);
+	}
+	free(bsdtar->pending_chdir);
+	bsdtar->pending_chdir = NULL;
+}
+
+/*
+ * Handle --strip-components and any future path-rewriting options.
+ * Returns non-zero if the pathname should not be extracted.
+ *
+ * TODO: Support pax-style regex path rewrites.
+ */
+int
+edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
+{
+	const char *name = archive_entry_pathname(entry);
+
+	/* Strip leading dir names as per --strip-components option. */
+	if (bsdtar->strip_components > 0) {
+		int r = bsdtar->strip_components;
+		const char *p = name;
+
+		while (r > 0) {
+			switch (*p++) {
+			case '/':
+				r--;
+				name = p;
+				break;
+			case '\0':
+				/* Path is too short, skip it. */
+				return (1);
+			}
+		}
+	}
+
+	/* Strip redundant leading '/' characters. */
+	while (name[0] == '/' && name[1] == '/')
+		name++;
+
+	/* Strip leading '/' unless user has asked us not to. */
+	if (name[0] == '/' && !bsdtar->option_absolute_paths) {
+		/* Generate a warning the first time this happens. */
+		if (!bsdtar->warned_lead_slash) {
+			bsdtar_warnc(bsdtar, 0,
+			    "Removing leading '/' from member names");
+			bsdtar->warned_lead_slash = 1;
+		}
+		name++;
+		/* Special case: Stripping leading '/' from "/" yields ".". */
+		if (*name == '\0')
+			name = ".";
+	}
+
+	/* Safely replace name in archive_entry. */
+	if (name != archive_entry_pathname(entry)) {
+		char *q = strdup(name);
+		archive_entry_copy_pathname(entry, q);
+		free(q);
+	}
+	return (0);
+}
+
+/*
+ * Like strcmp(), but try to be a little more aware of the fact that
+ * we're comparing two paths.  Right now, it just handles leading
+ * "./" and trailing '/' specially, so that "a/b/" == "./a/b"
+ *
+ * TODO: Make this better, so that "./a//b/./c/" == "a/b/c"
+ * TODO: After this works, push it down into libarchive.
+ * TODO: Publish the path normalization routines in libarchive so
+ * that bsdtar can normalize paths and use fast strcmp() instead
+ * of this.
+ */
+
+int
+pathcmp(const char *a, const char *b)
+{
+	/* Skip leading './' */
+	if (a[0] == '.' && a[1] == '/' && a[2] != '\0')
+		a += 2;
+	if (b[0] == '.' && b[1] == '/' && b[2] != '\0')
+		b += 2;
+	/* Find the first difference, or return (0) if none. */
+	while (*a == *b) {
+		if (*a == '\0')
+			return (0);
+		a++;
+		b++;
+	}
+	/*
+	 * If one ends in '/' and the other one doesn't,
+	 * they're the same.
+	 */
+	if (a[0] == '/' && a[1] == '\0' && b[0] == '\0')
+		return (0);
+	if (a[0] == '\0' && b[0] == '/' && b[1] == '\0')
+		return (0);
+	/* They're really different, return the correct sign. */
+	return (*(const unsigned char *)a - *(const unsigned char *)b);
+}