From 75103841072d71603b49ad00648e204ffcca589d Mon Sep 17 00:00:00 2001
From: Denis Vlasenko
Date: Wed, 20 Jun 2007 14:49:47 +0000
Subject: do not do utime() on links, it acts on link targets, and we don't
 want that. rename link_name to link_target, less confusing this way.

---
 archival/libunarchive/data_extract_all.c    | 50 ++++++++++++++++-------------
 archival/libunarchive/get_header_cpio.c     | 12 +++----
 archival/libunarchive/get_header_tar.c      | 12 +++----
 archival/libunarchive/header_verbose_list.c |  4 +--
 4 files changed, 41 insertions(+), 37 deletions(-)

(limited to 'archival')

diff --git a/archival/libunarchive/data_extract_all.c b/archival/libunarchive/data_extract_all.c
index 0bb5bfe..76e7edf 100644
--- a/archival/libunarchive/data_extract_all.c
+++ b/archival/libunarchive/data_extract_all.c
@@ -25,7 +25,8 @@ void data_extract_all(archive_handle_t *archive_handle)
 		 && (unlink(file_header->name) == -1)
 		 && (errno != ENOENT)
 		) {
-			bb_perror_msg_and_die("cannot remove old file");
+			bb_perror_msg_and_die("cannot remove old file %s",
+					file_header->name);
 		}
 	}
 	else if (archive_handle->flags & ARCHIVE_EXTRACT_NEWER) {
@@ -52,13 +53,16 @@ void data_extract_all(archive_handle_t *archive_handle)
 
 	/* Handle hard links separately
 	 * We identified hard links as regular files of size 0 with a symlink */
-	if (S_ISREG(file_header->mode) && (file_header->link_name)
+	if (S_ISREG(file_header->mode) && (file_header->link_target)
 	 && (file_header->size == 0)
 	) {
 		/* hard link */
-		res = link(file_header->link_name, file_header->name);
+		res = link(file_header->link_target, file_header->name);
 		if ((res == -1) && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)) {
-			bb_perror_msg("cannot create hard link");
+			bb_perror_msg("cannot create %slink "
+					"from %s to %s", "hard",
+					file_header->name,
+					file_header->link_target);
 		}
 	} else {
 		/* Create the filesystem entry */
@@ -73,22 +77,22 @@ void data_extract_all(archive_handle_t *archive_handle)
 		}
 		case S_IFDIR:
 			res = mkdir(file_header->name, file_header->mode);
-			if ((errno != EISDIR) && (res == -1)
+			if ((res == -1) && (errno != EISDIR)
 			 && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
 			) {
-				bb_perror_msg("extract_archive: %s", file_header->name);
+				bb_perror_msg("cannot make dir %s", file_header->name);
 			}
 			break;
 		case S_IFLNK:
 			/* Symlink */
-			res = symlink(file_header->link_name, file_header->name);
+			res = symlink(file_header->link_target, file_header->name);
 			if ((res == -1)
 			 && !(archive_handle->flags & ARCHIVE_EXTRACT_QUIET)
 			) {
-				bb_perror_msg("cannot create symlink "
-					"from %s to '%s'",
+				bb_perror_msg("cannot create %slink "
+					"from %s to %s", "sym",
 					file_header->name,
-					file_header->link_name);
+					file_header->link_target);
 			}
 			break;
 		case S_IFSOCK:
@@ -110,18 +114,18 @@ void data_extract_all(archive_handle_t *archive_handle)
 	if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_OWN)) {
 		lchown(file_header->name, file_header->uid, file_header->gid);
 	}
-	/* uclibc has no lchmod, glibc is even stranger -
-	 * it has lchmod which seems to do nothing!
-	 * so we use chmod... */
-	if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM)
-	 && (file_header->mode & S_IFMT) != S_IFLNK
-	) {
-		chmod(file_header->name, file_header->mode);
-	}
-
-	if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
-		struct utimbuf t;
-		t.actime = t.modtime = file_header->mtime;
-		utime(file_header->name, &t);
+	if ((file_header->mode & S_IFMT) != S_IFLNK) {
+		/* uclibc has no lchmod, glibc is even stranger -
+		 * it has lchmod which seems to do nothing!
+		 * so we use chmod... */
+		if (!(archive_handle->flags & ARCHIVE_NOPRESERVE_PERM)) {
+			chmod(file_header->name, file_header->mode);
+		}
+		/* same for utime */
+		if (archive_handle->flags & ARCHIVE_PRESERVE_DATE) {
+			struct utimbuf t;
+			t.actime = t.modtime = file_header->mtime;
+			utime(file_header->name, &t);
+		}
 	}
 }
diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c
index 6fd1340..724368b 100644
--- a/archival/libunarchive/get_header_cpio.c
+++ b/archival/libunarchive/get_header_cpio.c
@@ -30,7 +30,7 @@ char get_header_cpio(archive_handle_t *archive_handle)
 		tmp = saved_hardlinks;
 		oldtmp = NULL;
 
-		file_header->link_name = file_header->name;
+		file_header->link_target = file_header->name;
 		file_header->size = 0;
 
 		while (tmp) {
@@ -56,7 +56,7 @@ char get_header_cpio(archive_handle_t *archive_handle)
 				saved_hardlinks = tmp;
 		}
 
-		file_header->name = file_header->link_name;
+		file_header->name = file_header->link_target;
 
 		if (pending_hardlinks > 1) {
 			bb_error_msg("error resolving hardlink: archive made by GNU cpio 2.0-2.2?");
@@ -122,12 +122,12 @@ char get_header_cpio(archive_handle_t *archive_handle)
 	}
 
 	if (S_ISLNK(file_header->mode)) {
-		file_header->link_name = xzalloc(file_header->size + 1);
-		xread(archive_handle->src_fd, file_header->link_name, file_header->size);
+		file_header->link_target = xzalloc(file_header->size + 1);
+		xread(archive_handle->src_fd, file_header->link_target, file_header->size);
 		archive_handle->offset += file_header->size;
 		file_header->size = 0; /* Stop possible seeks in future */
 	} else {
-		file_header->link_name = NULL;
+		file_header->link_target = NULL;
 	}
 	if (nlink > 1 && !S_ISDIR(file_header->mode)) {
 		if (file_header->size == 0) { /* Put file on a linked list for later */
@@ -154,7 +154,7 @@ char get_header_cpio(archive_handle_t *archive_handle)
 
 	archive_handle->offset += file_header->size;
 
-	free(file_header->link_name);
+	free(file_header->link_target);
 
 	return EXIT_SUCCESS;
 }
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c
index b3efdec..d42f4c2 100644
--- a/archival/libunarchive/get_header_tar.c
+++ b/archival/libunarchive/get_header_tar.c
@@ -141,13 +141,13 @@ char get_header_tar(archive_handle_t *archive_handle)
 		unsigned major = GET_OCTAL(tar.devmajor);
 		file_header->device = makedev(major, minor);
 	}
-	file_header->link_name = NULL;
+	file_header->link_target = NULL;
 	if (!linkname && parse_names && tar.linkname[0]) {
 		/* we trash magic[0] here, it's ok */
 		tar.linkname[sizeof(tar.linkname)] = '\0';
-		file_header->link_name = xstrdup(tar.linkname);
-		/* FIXME: what if we have non-link object with link_name? */
-		/* Will link_name be free()ed? */
+		file_header->link_target = xstrdup(tar.linkname);
+		/* FIXME: what if we have non-link object with link_target? */
+		/* Will link_target be free()ed? */
 	}
 	file_header->mtime = GET_OCTAL(tar.mtime);
 	file_header->size = GET_OCTAL(tar.size);
@@ -248,7 +248,7 @@ char get_header_tar(archive_handle_t *archive_handle)
 		longname = NULL;
 	}
 	if (linkname) {
-		file_header->link_name = linkname;
+		file_header->link_target = linkname;
 		linkname = NULL;
 	}
 #endif
@@ -277,7 +277,7 @@ char get_header_tar(archive_handle_t *archive_handle)
 	}
 	archive_handle->offset += file_header->size;
 
-	free(file_header->link_name);
+	free(file_header->link_target);
 	/* Do not free(file_header->name)! */
 
 	return EXIT_SUCCESS;
diff --git a/archival/libunarchive/header_verbose_list.c b/archival/libunarchive/header_verbose_list.c
index 7b97e52..f3b0d8c 100644
--- a/archival/libunarchive/header_verbose_list.c
+++ b/archival/libunarchive/header_verbose_list.c
@@ -23,8 +23,8 @@ void header_verbose_list(const file_header_t *file_header)
 		mtime->tm_sec,
 		file_header->name);
 
-	if (file_header->link_name) {
-		printf(" -> %s", file_header->link_name);
+	if (file_header->link_target) {
+		printf(" -> %s", file_header->link_target);
 	}
 	/* putchar isnt used anywhere else i dont think */
 	puts("");
-- 
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