apply post 1.7.0 patches, set version to 1.7.11_7_1

17 files changed, 283 insertions, 200 deletions

diff --git a/Makefile b/Makefile
index 9e35e517a..5ac88313c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 1
 PATCHLEVEL = 7
 SUBLEVEL = 1
-EXTRAVERSION = .svn
+EXTRAVERSION =
 NAME = Unnamed
 
 # *DOCUMENTATION*
diff --git a/applets/applets.c b/applets/applets.c
index 6de6db3cd..b40f01836 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -546,7 +546,7 @@ static int busybox_main(char **argv)
  help:
 		output_width = 80;
 		if (ENABLE_FEATURE_AUTOWIDTH) {
-			/* Obtain the terminal width.  */
+			/* Obtain the terminal width */
 			get_terminal_width_height(0, &output_width, NULL);
 		}
 		/* leading tab and room to wrap */
@@ -580,12 +580,11 @@ static int busybox_main(char **argv)
 
 	if (ENABLE_FEATURE_INSTALLER && strcmp(argv[1], "--install") == 0) {
 		const char *busybox;
-		busybox = xmalloc_readlink_or_warn(bb_busybox_exec_path);
+		busybox = xmalloc_readlink(bb_busybox_exec_path);
 		if (!busybox)
 			busybox = bb_busybox_exec_path;
 		/* -s makes symlinks */
-		install_links(busybox,
-				 argv[2] && strcmp(argv[2], "-s") == 0);
+		install_links(busybox, argv[2] && strcmp(argv[2], "-s") == 0);
 		return 0;
 	}
 
diff --git a/archival/bbunzip.c b/archival/bbunzip.c
index 56c742a49..a4e525f2e 100644
--- a/archival/bbunzip.c
+++ b/archival/bbunzip.c
@@ -298,7 +298,7 @@ USE_DESKTOP(long long) int unpack_unlzma(void)
 int unlzma_main(int argc, char **argv);
 int unlzma_main(int argc, char **argv)
 {
-	getopt32(argv, "c");
+	getopt32(argv, "cf");
 	argv += optind;
 	/* lzmacat? */
 	if (applet_name[4] == 'c')
diff --git a/archival/libunarchive/Kbuild b/archival/libunarchive/Kbuild
index 3c29d541a..d104524e4 100644
--- a/archival/libunarchive/Kbuild
+++ b/archival/libunarchive/Kbuild
@@ -35,36 +35,34 @@ DPKG_FILES:= \
 	get_header_tar.o \
 	filter_accept_list_reassign.o
 
-# open_transformer uses fork(). Compile it only if absolutely necessary
 lib-$(CONFIG_RPM)                       += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_BZIP2)	        += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_LZMA)	        += open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_GZIP)		+= open_transformer.o
-lib-$(CONFIG_FEATURE_TAR_COMPRESS)	+= open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_GZ)	+= open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_BZ2)	+= open_transformer.o
-lib-$(CONFIG_FEATURE_DEB_TAR_LZMA)	+= open_transformer.o
-
-lib-$(CONFIG_AR)			+= get_header_ar.o unpack_ar_archive.o
-lib-$(CONFIG_BUNZIP2)			+= decompress_bunzip2.o
-lib-$(CONFIG_UNLZMA)			+= decompress_unlzma.o
-lib-$(CONFIG_CPIO)			+= get_header_cpio.o
-lib-$(CONFIG_DPKG)			+= $(DPKG_FILES)
-lib-$(CONFIG_DPKG_DEB)			+= $(DPKG_FILES)
-lib-$(CONFIG_FEATURE_DEB_TAR_GZ)	+= $(GUNZIP_FILES) get_header_tar_gz.o
-lib-$(CONFIG_FEATURE_DEB_TAR_BZ2)	+= decompress_bunzip2.o get_header_tar_bz2.o
-lib-$(CONFIG_FEATURE_DEB_TAR_LZMA)	+= decompress_unlzma.o get_header_tar_lzma.o
-lib-$(CONFIG_GUNZIP)			+= $(GUNZIP_FILES)
-lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS)	+= decompress_uncompress.o
-lib-$(CONFIG_RPM2CPIO)			+= $(GUNZIP_FILES) get_header_cpio.o
-lib-$(CONFIG_RPM)			+= $(GUNZIP_FILES) get_header_cpio.o
-lib-$(CONFIG_FEATURE_RPM_BZ2)		+= decompress_bunzip2.o
-lib-$(CONFIG_TAR)			+= get_header_tar.o
-lib-$(CONFIG_FEATURE_TAR_BZIP2)		+= decompress_bunzip2.o get_header_tar_bz2.o
-lib-$(CONFIG_FEATURE_TAR_LZMA)		+= decompress_unlzma.o get_header_tar_lzma.o
-lib-$(CONFIG_FEATURE_TAR_GZIP)		+= $(GUNZIP_FILES) get_header_tar_gz.o
-lib-$(CONFIG_FEATURE_TAR_COMPRESS)	+= decompress_uncompress.o
-lib-$(CONFIG_UNCOMPRESS)		+= decompress_uncompress.o
-lib-$(CONFIG_UNZIP)			+= $(GUNZIP_FILES)
-lib-$(CONFIG_FEATURE_COMPRESS_USAGE)	+= decompress_bunzip2.o
+lib-$(CONFIG_FEATURE_TAR_BZIP2)         += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_LZMA)          += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_GZIP)          += open_transformer.o
+lib-$(CONFIG_FEATURE_TAR_COMPRESS)      += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_GZ)        += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_BZ2)       += open_transformer.o
+lib-$(CONFIG_FEATURE_DEB_TAR_LZMA)      += open_transformer.o
 
+lib-$(CONFIG_AR)                        += get_header_ar.o unpack_ar_archive.o
+lib-$(CONFIG_BUNZIP2)                   += decompress_bunzip2.o
+lib-$(CONFIG_UNLZMA)                    += decompress_unlzma.o
+lib-$(CONFIG_CPIO)                      += get_header_cpio.o
+lib-$(CONFIG_DPKG)                      += $(DPKG_FILES)
+lib-$(CONFIG_DPKG_DEB)                  += $(DPKG_FILES)
+lib-$(CONFIG_FEATURE_DEB_TAR_GZ)        += $(GUNZIP_FILES) get_header_tar_gz.o
+lib-$(CONFIG_FEATURE_DEB_TAR_BZ2)       += decompress_bunzip2.o get_header_tar_bz2.o
+lib-$(CONFIG_FEATURE_DEB_TAR_LZMA)      += decompress_unlzma.o get_header_tar_lzma.o
+lib-$(CONFIG_GUNZIP)                    += $(GUNZIP_FILES)
+lib-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o
+lib-$(CONFIG_RPM2CPIO)                  += $(GUNZIP_FILES) get_header_cpio.o
+lib-$(CONFIG_RPM)                       += $(GUNZIP_FILES) get_header_cpio.o
+lib-$(CONFIG_FEATURE_RPM_BZ2)           += decompress_bunzip2.o
+lib-$(CONFIG_TAR)                       += get_header_tar.o
+lib-$(CONFIG_FEATURE_TAR_BZIP2)         += decompress_bunzip2.o get_header_tar_bz2.o
+lib-$(CONFIG_FEATURE_TAR_LZMA)          += decompress_unlzma.o get_header_tar_lzma.o
+lib-$(CONFIG_FEATURE_TAR_GZIP)          += $(GUNZIP_FILES) get_header_tar_gz.o
+lib-$(CONFIG_FEATURE_TAR_COMPRESS)      += decompress_uncompress.o
+lib-$(CONFIG_UNCOMPRESS)                += decompress_uncompress.o
+lib-$(CONFIG_UNZIP)                     += $(GUNZIP_FILES)
+lib-$(CONFIG_FEATURE_COMPRESS_USAGE)    += decompress_bunzip2.o
diff --git a/archival/libunarchive/get_header_tar_bz2.c b/archival/libunarchive/get_header_tar_bz2.c
index e11f44cad..8f7f83fc2 100644
--- a/archival/libunarchive/get_header_tar_bz2.c
+++ b/archival/libunarchive/get_header_tar_bz2.c
@@ -11,7 +11,7 @@ char get_header_tar_bz2(archive_handle_t *archive_handle)
 	/* Can't lseek over pipes */
 	archive_handle->seek = seek_by_read;
 
-	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream);
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_bz2_stream, "bunzip2", "bunzip2", "-cf", "-", NULL);
 	archive_handle->offset = 0;
 	while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
 
diff --git a/archival/libunarchive/get_header_tar_gz.c b/archival/libunarchive/get_header_tar_gz.c
index 85070d978..a99061411 100644
--- a/archival/libunarchive/get_header_tar_gz.c
+++ b/archival/libunarchive/get_header_tar_gz.c
@@ -8,19 +8,26 @@
 
 char get_header_tar_gz(archive_handle_t *archive_handle)
 {
+#if BB_MMU
 	unsigned char magic[2];
+#endif
 
 	/* Can't lseek over pipes */
 	archive_handle->seek = seek_by_read;
 
+	/* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
+	 * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
+	 * need the header. */
+#if BB_MMU
 	xread(archive_handle->src_fd, &magic, 2);
 	if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
 		bb_error_msg_and_die("invalid gzip magic");
 	}
 
 	check_header_gzip_or_die(archive_handle->src_fd);
+#endif
 
-	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream);
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip", "gunzip", "-cf", "-", NULL);
 	archive_handle->offset = 0;
 	while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
 
diff --git a/archival/libunarchive/get_header_tar_lzma.c b/archival/libunarchive/get_header_tar_lzma.c
index 771f664f2..f0e45f2c5 100644
--- a/archival/libunarchive/get_header_tar_lzma.c
+++ b/archival/libunarchive/get_header_tar_lzma.c
@@ -14,7 +14,7 @@ char get_header_tar_lzma(archive_handle_t * archive_handle)
 	/* Can't lseek over pipes */
 	archive_handle->seek = seek_by_read;
 
-	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream);
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma", "unlzma", "-cf", "-", NULL);
 	archive_handle->offset = 0;
 	while (get_header_tar(archive_handle) == EXIT_SUCCESS) /**/;
 
diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c
index 0ee080621..f8f587e8d 100644
--- a/archival/libunarchive/open_transformer.c
+++ b/archival/libunarchive/open_transformer.c
@@ -7,27 +7,48 @@
 #include "unarchive.h"
 
 /* transformer(), more than meets the eye */
+/*
+ * On MMU machine, the transform_prog and ... are stripped
+ * by a macro in include/unarchive.h. On NOMMU, transformer is stripped.
+ */
 int open_transformer(int src_fd,
-	USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd))
+	USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd),
+	const char *transform_prog, ...)
 {
 	int fd_pipe[2];
 	int pid;
 
 	xpipe(fd_pipe);
 
+#if BB_MMU
 	pid = fork();
-	if (pid == -1) {
+#else
+	pid = vfork();
+#endif
+	if (pid == -1)
 		bb_perror_msg_and_die("fork failed");
-	}
 
 	if (pid == 0) {
+#if !BB_MMU
+		va_list ap;
+#endif
 		/* child process */
 		close(fd_pipe[0]); /* We don't wan't to read from the parent */
 		// FIXME: error check?
+#if BB_MMU
 		transformer(src_fd, fd_pipe[1]);
-		close(fd_pipe[1]); /* Send EOF */
-		close(src_fd);
+		if (ENABLE_FEATURE_CLEAN_UP) {
+			close(fd_pipe[1]); /* Send EOF */
+			close(src_fd);
+		}
 		exit(0);
+#else
+		xmove_fd(src_fd, 0);
+		xmove_fd(fd_pipe[1], 1);
+		va_start(ap, transform_prog);
+		BB_EXECVP(transform_prog, ap);
+		bb_perror_and_die("exec failed");
+#endif
 		/* notreached */
 	}
 
diff --git a/archival/rpm.c b/archival/rpm.c
index 674ee2640..4d723b73f 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -187,9 +187,15 @@ int rpm_main(int argc, char **argv)
 
 static void extract_cpio_gz(int fd)
 {
-	USE_DESKTOP(long long) int (*xformer)(int src_fd, int dst_fd);
 	archive_handle_t *archive_handle;
 	unsigned char magic[2];
+#if BB_MMU
+	USE_DESKTOP(long long) int (*xformer)(int src_fd, int dst_fd);
+	enum { xformer_prog = 0 };
+#else
+	enum { xformer = 0 };
+	const char *xformer_prog;
+#endif
 
 	/* Initialize */
 	archive_handle = init_handle();
@@ -202,11 +208,19 @@ static void extract_cpio_gz(int fd)
 	archive_handle->offset = 0;
 
 	xread(archive_handle->src_fd, &magic, 2);
+#if BB_MMU
 	xformer = unpack_gz_stream;
+#else
+	xformer_prog = "gunzip";
+#endif
 	if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
 		if (ENABLE_FEATURE_RPM_BZ2
 		 && (magic[0] == 0x42) && (magic[1] == 0x5a)) {
+#if BB_MMU
 			xformer = unpack_bz2_stream;
+#else
+			xformer_prog = "bunzip2";
+#endif
 	/* We can do better, need modifying unpack_bz2_stream to not require
 	 * first 2 bytes. Not very hard to do... I mean, TODO :) */
 			xlseek(archive_handle->src_fd, -2, SEEK_CUR);
@@ -214,11 +228,17 @@ static void extract_cpio_gz(int fd)
 			bb_error_msg_and_die("no gzip"
 				USE_FEATURE_RPM_BZ2("/bzip")
 				" magic");
-	} else
+	} else {
 		check_header_gzip_or_die(archive_handle->src_fd);
+#if !BB_MMU
+		/* NOMMU version of open_transformer execs an external unzipper that should
+		 * have the file position at the start of the file */
+		xlseek(archive_handle->src_fd, 0, SEEK_SET);
+#endif
+	}
 
 	xchdir("/"); /* Install RPM's to root */
-	archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer);
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer, xformer_prog, xformer_prog, "-cf", "-", NULL);
 	archive_handle->offset = 0;
 	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 		continue;
diff --git a/archival/tar.c b/archival/tar.c
index 9bf9058d8..7235616cf 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -648,7 +648,7 @@ static char get_header_tar_Z(archive_handle_t *archive_handle)
 		bb_error_msg_and_die("invalid magic");
 	}
 
-	archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
+	archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress, "uncompress", "uncompress", "-cf", "-", NULL);
 	archive_handle->offset = 0;
 	while (get_header_tar(archive_handle) == EXIT_SUCCESS)
 		/* nothing */;
diff --git a/include/libbb.h b/include/libbb.h
index e514fe2f2..140e21dea 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -248,9 +248,10 @@ void xmove_fd(int, int);
 DIR *xopendir(const char *path);
 DIR *warn_opendir(const char *path);
 
-char *xrealloc_getcwd_or_warn(char *cwd);
+/* UNUSED: char *xmalloc_realpath(const char *path); */
+char *xmalloc_readlink(const char *path);
 char *xmalloc_readlink_or_warn(const char *path);
-char *xmalloc_realpath(const char *path);
+char *xrealloc_getcwd_or_warn(char *cwd);
 
 
 //TODO: signal(sid, f) is the same? then why?
@@ -316,8 +317,8 @@ enum {
 };
 /* Create stream socket, and allocate suitable lsa.
  * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
- * af == AF_UNSPEC will result in trying to create IPv6, and
- * if kernel doesn't support it, IPv4.
+ * af == AF_UNSPEC will result in trying to create IPv6 socket,
+ * and if kernel doesn't support it, IPv4.
  */
 int xsocket_type(len_and_sockaddr **lsap, USE_FEATURE_IPV6(int af,) int sock_type);
 int xsocket_stream(len_and_sockaddr **lsap);
diff --git a/include/unarchive.h b/include/unarchive.h
index bea055852..51ec89cc0 100644
--- a/include/unarchive.h
+++ b/include/unarchive.h
@@ -115,7 +115,13 @@ extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsig
 extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd);
 extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd);
 
+#if BB_MMU
 extern int open_transformer(int src_fd,
 	USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd));
+#define open_transformer(src_fd, transformer, transform_prog, ...) open_transformer(src_fd, transformer)
+#else
+extern int open_transformer(int src_fd, const char *transform_prog, ...);
+#define open_transformer(src_fd, transformer, transform_prog, ...) open_transformer(src_fd, transform_prog, __VA_ARGS__)
+#endif
 
 #endif
diff --git a/libbb/copy_file.c b/libbb/copy_file.c
index b68a257b5..3da8a3531 100644
--- a/libbb/copy_file.c
+++ b/libbb/copy_file.c
@@ -19,28 +19,31 @@
 // (or fail, if it points to dir/nonexistent location/etc).
 // This is strange, but POSIX-correct.
 // coreutils cp has --remove-destination to override this...
+//
+// NB: we have special code which still allows for "cp file /dev/node"
+// to work POSIX-ly (the only realistic case where it makes sense)
 
 #define DO_POSIX_CP 0  /* 1 - POSIX behavior, 0 - safe behavior */
 
-
+// errno must be set to relevant value ("why we cannot create dest?")
+// for POSIX mode to give reasonable error message
 static int ask_and_unlink(const char *dest, int flags)
 {
-	// If !DO_POSIX_CP, act as if -f is always in effect - we don't want
-	// "'file' exists" msg, we want unlink to be done (silently unless -i
-	// is also in effect).
-	// This prevents safe way from asking more questions than POSIX does.
 #if DO_POSIX_CP
 	if (!(flags & (FILEUTILS_FORCE|FILEUTILS_INTERACTIVE))) {
-		fprintf(stderr, "'%s' exists\n", dest);
+		// Either it exists, or the *path* doesnt exist
+		bb_perror_msg("cannot create '%s'", dest);
 		return -1;
 	}
 #endif
+	// If !DO_POSIX_CP, act as if -f is always in effect - we don't want
+	// "cannot create" msg, we want unlink to be done (silently unless -i).
 
 	// TODO: maybe we should do it only if ctty is present?
 	if (flags & FILEUTILS_INTERACTIVE) {
 		// We would not do POSIX insanity. -i asks,
 		// then _unlinks_ the offender. Presto.
-		// (No opening without O_EXCL, no unlinks only if -f)
+		// (No "opening without O_EXCL", no "unlink only if -f")
 		// Or else we will end up having 3 open()s!
 		fprintf(stderr, "%s: overwrite '%s'? ", applet_name, dest);
 		if (!bb_ask_confirmation())
@@ -60,9 +63,11 @@ static int ask_and_unlink(const char *dest, int flags)
  */
 int copy_file(const char *source, const char *dest, int flags)
 {
+	/* This is a recursive function, try to minimize stack usage */
+	/* NB: each struct stat is ~100 bytes */
 	struct stat source_stat;
 	struct stat dest_stat;
-	int status = 0;
+	signed char retval = 0;
 	signed char dest_exists = 0;
 	signed char ovr;
 
@@ -112,6 +117,7 @@ int copy_file(const char *source, const char *dest, int flags)
 
 	if (S_ISDIR(source_stat.st_mode)) {
 		DIR *dp;
+		const char *tp;
 		struct dirent *d;
 		mode_t saved_umask = 0;
 
@@ -120,12 +126,23 @@ int copy_file(const char *source, const char *dest, int flags)
 			return -1;
 		}
 
-		/* Create DEST.  */
+		/* Did we ever create source ourself before? */
+		tp = is_in_ino_dev_hashtable(&source_stat);
+		if (tp) {
+			/* We did! it's a recursion! man the lifeboats... */
+			bb_error_msg("recursion detected, omitting directory '%s'",
+					source);
+			return -1;
+		}
+
+		/* Create DEST */
 		if (dest_exists) {
 			if (!S_ISDIR(dest_stat.st_mode)) {
 				bb_error_msg("target '%s' is not a directory", dest);
 				return -1;
 			}
+			/* race here: user can substitute a symlink between
+			 * this check and actual creation of files inside dest */
 		} else {
 			mode_t mode;
 			saved_umask = umask(0);
@@ -133,22 +150,29 @@ int copy_file(const char *source, const char *dest, int flags)
 			mode = source_stat.st_mode;
 			if (!(flags & FILEUTILS_PRESERVE_STATUS))
 				mode = source_stat.st_mode & ~saved_umask;
+			/* Allow owner to access new dir (at least for now) */
 			mode |= S_IRWXU;
-
 			if (mkdir(dest, mode) < 0) {
 				umask(saved_umask);
 				bb_perror_msg("cannot create directory '%s'", dest);
 				return -1;
 			}
-
 			umask(saved_umask);
+			/* need stat info for add_to_ino_dev_hashtable */
+			if (lstat(dest, &dest_stat) < 0) {
+				bb_perror_msg("cannot stat '%s'", dest);
+				return -1;
+			}
 		}
+		/* remember (dev,inode) of each created dir.
+		 * NULL: name is not remembered */
+		add_to_ino_dev_hashtable(&dest_stat, NULL);
 
-		/* Recursively copy files in SOURCE.  */
+		/* Recursively copy files in SOURCE */
 		dp = opendir(source);
 		if (dp == NULL) {
-			status = -1;
-			goto preserve_status;
+			retval = -1;
+			goto preserve_mode_ugid_time;
 		}
 
 		while ((d = readdir(dp)) != NULL) {
@@ -159,7 +183,7 @@ int copy_file(const char *source, const char *dest, int flags)
 				continue;
 			new_dest = concat_path_file(dest, d->d_name);
 			if (copy_file(new_source, new_dest, flags) < 0)
-				status = -1;
+				retval = -1;
 			free(new_source);
 			free(new_dest);
 		}
@@ -168,11 +192,13 @@ int copy_file(const char *source, const char *dest, int flags)
 		if (!dest_exists
 		 && chmod(dest, source_stat.st_mode & ~saved_umask) < 0
 		) {
-			bb_perror_msg("cannot change permissions of '%s'", dest);
-			status = -1;
+			bb_perror_msg("cannot preserve %s of '%s'", "permissions", dest);
+			/* retval = -1; - WRONG! copy *WAS* made */
 		}
+		goto preserve_mode_ugid_time;
+	}
 
-	} else if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) {
+	if (flags & (FILEUTILS_MAKE_SOFTLINK|FILEUTILS_MAKE_HARDLINK)) {
 		int (*lf)(const char *oldpath, const char *newpath);
  make_links:
 		// Hmm... maybe
@@ -188,47 +214,52 @@ int copy_file(const char *source, const char *dest, int flags)
 				return -1;
 			}
 		}
+		/* _Not_ jumping to preserve_mode_ugid_time:
+		 * hard/softlinks don't have those */
 		return 0;
+	}
 
-	} else if (S_ISREG(source_stat.st_mode)
-	 /* Huh? DEREF uses stat, which never returns links! */
+	if (S_ISREG(source_stat.st_mode)
+	 /* DEREF uses stat, which never returns S_ISLNK() == true. */
 	 /* || (FLAGS_DEREF && S_ISLNK(source_stat.st_mode)) */
 	) {
 		int src_fd;
 		int dst_fd;
-		if (ENABLE_FEATURE_PRESERVE_HARDLINKS) {
-			char *link_target;
 
-			if (!FLAGS_DEREF) {
-				link_target = is_in_ino_dev_hashtable(&source_stat);
-				if (link_target) {
+		if (ENABLE_FEATURE_PRESERVE_HARDLINKS && !FLAGS_DEREF) {
+			const char *link_target;
+			link_target = is_in_ino_dev_hashtable(&source_stat);
+			if (link_target) {
+				if (link(link_target, dest) < 0) {
+					ovr = ask_and_unlink(dest, flags);
+					if (ovr <= 0)
+						return ovr;
 					if (link(link_target, dest) < 0) {
-						ovr = ask_and_unlink(dest, flags);
-						if (ovr <= 0)
-							return ovr;
-						if (link(link_target, dest) < 0) {
-							bb_perror_msg("cannot create link '%s'", dest);
-							return -1;
-						}
+						bb_perror_msg("cannot create link '%s'", dest);
+						return -1;
 					}
-					return 0;
 				}
+				return 0;
 			}
 			add_to_ino_dev_hashtable(&source_stat, dest);
 		}
 
 		src_fd = open_or_warn(source, O_RDONLY);
-		if (src_fd < 0) {
+		if (src_fd < 0)
 			return -1;
-		}
 
-#if DO_POSIX_CP  /* POSIX way (a security problem versus symlink attacks!): */
-		dst_fd = open(dest, (flags & FILEUTILS_INTERACTIVE)
-				? O_WRONLY|O_CREAT|O_EXCL
-				: O_WRONLY|O_CREAT|O_TRUNC, source_stat.st_mode);
-#else  /* safe way: */
-		dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, source_stat.st_mode);
-#endif
+		/* POSIX way is a security problem versus symlink attacks,
+		 * we do it only for non-symlinks, and only for non-recursive,
+		 * non-interactive cp. NB: it is still racy
+		 * for "cp file /home/bad_user/file" case
+		 * (user can rm file and create a link to /etc/passwd) */
+		if (DO_POSIX_CP
+		 || (dest_exists && !(flags & (FILEUTILS_RECUR|FILEUTILS_INTERACTIVE))
+		     && !S_ISLNK(dest_stat.st_mode))
+		) {
+			dst_fd = open(dest, O_WRONLY|O_CREAT|O_TRUNC, source_stat.st_mode);
+		} else  /* safe way: */
+			dst_fd = open(dest, O_WRONLY|O_CREAT|O_EXCL, source_stat.st_mode);
 		if (dst_fd == -1) {
 			ovr = ask_and_unlink(dest, flags);
 			if (ovr <= 0) {
@@ -264,60 +295,55 @@ int copy_file(const char *source, const char *dest, int flags)
 		}
 #endif
 		if (bb_copyfd_eof(src_fd, dst_fd) == -1)
-			status = -1;
+			retval = -1;
+		/* Ok, writing side I can understand... */
 		if (close(dst_fd) < 0) {
 			bb_perror_msg("cannot close '%s'", dest);
-			status = -1;
-		}
-		if (close(src_fd) < 0) {
-			bb_perror_msg("cannot close '%s'", source);
-			status = -1;
+			retval = -1;
 		}
+		/* ...but read size is already checked by bb_copyfd_eof */
+		close(src_fd);
+		goto preserve_mode_ugid_time;
+	}
 
-	} else if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
-	 || S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode)
-	 || S_ISLNK(source_stat.st_mode)
-	) {
-		// We are lazy here, a bit lax with races...
-		if (dest_exists) {
-			ovr = ask_and_unlink(dest, flags);
-			if (ovr <= 0)
-				return ovr;
-		}
-		if (S_ISFIFO(source_stat.st_mode)) {
-			if (mkfifo(dest, source_stat.st_mode) < 0) {
-				bb_perror_msg("cannot create fifo '%s'", dest);
-				return -1;
-			}
-		} else if (S_ISLNK(source_stat.st_mode)) {
-			char *lpath;
-
-			lpath = xmalloc_readlink_or_warn(source);
-			if (lpath && symlink(lpath, dest) < 0) {
+	/* Source is a symlink or a special file */
+	/* We are lazy here, a bit lax with races... */
+	if (dest_exists) {
+		errno = EEXIST;
+		ovr = ask_and_unlink(dest, flags);
+		if (ovr <= 0)
+			return ovr;
+	}
+	if (S_ISLNK(source_stat.st_mode)) {
+		char *lpath = xmalloc_readlink_or_warn(source);
+		if (lpath) {
+			int r = symlink(lpath, dest);
+			free(lpath);
+			if (r < 0) {
 				bb_perror_msg("cannot create symlink '%s'", dest);
-				free(lpath);
 				return -1;
 			}
-			free(lpath);
-
 			if (flags & FILEUTILS_PRESERVE_STATUS)
 				if (lchown(dest, source_stat.st_uid, source_stat.st_gid) < 0)
 					bb_perror_msg("cannot preserve %s of '%s'", "ownership", dest);
-
-			return 0;
-
-		} else {
-			if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
-				bb_perror_msg("cannot create '%s'", dest);
-				return -1;
-			}
+		}
+		/* _Not_ jumping to preserve_mode_ugid_time:
+		 * symlinks don't have those */
+		return 0;
+	}
+	if (S_ISBLK(source_stat.st_mode) || S_ISCHR(source_stat.st_mode)
+	 || S_ISSOCK(source_stat.st_mode) || S_ISFIFO(source_stat.st_mode)
+	) {
+		if (mknod(dest, source_stat.st_mode, source_stat.st_rdev) < 0) {
+			bb_perror_msg("cannot create '%s'", dest);
+			return -1;
 		}
 	} else {
-		bb_error_msg("internal error: unrecognized file type");
+		bb_error_msg("unrecognized file '%s' with mode %x", source, source_stat.st_mode);
 		return -1;
 	}
 
- preserve_status:
+ preserve_mode_ugid_time:
 
 	if (flags & FILEUTILS_PRESERVE_STATUS
 	/* Cannot happen: */
@@ -327,6 +353,7 @@ int copy_file(const char *source, const char *dest, int flags)
 
 		times.actime = source_stat.st_atime;
 		times.modtime = source_stat.st_mtime;
+		/* BTW, utimes sets usec-precision time - just FYI */
 		if (utime(dest, &times) < 0)
 			bb_perror_msg("cannot preserve %s of '%s'", "times", dest);
 		if (chown(dest, source_stat.st_uid, source_stat.st_gid) < 0) {
@@ -337,5 +364,5 @@ int copy_file(const char *source, const char *dest, int flags)
 			bb_perror_msg("cannot preserve %s of '%s'", "permissions", dest);
 	}
 
-	return status;
+	return retval;
 }
diff --git a/libbb/xreadlink.c b/libbb/xreadlink.c
index 18a8b9467..4d87b944d 100644
--- a/libbb/xreadlink.c
+++ b/libbb/xreadlink.c
@@ -10,8 +10,7 @@
  * NOTE: This function returns a malloced char* that you will have to free
  * yourself. You have been warned.
  */
-
-char *xmalloc_readlink_or_warn(const char *path)
+char *xmalloc_readlink(const char *path)
 {
 	enum { GROWBY = 80 }; /* how large we will grow strings by */
 
@@ -20,20 +19,30 @@ char *xmalloc_readlink_or_warn(const char *path)
 
 	do {
 		buf = xrealloc(buf, bufsize += GROWBY);
-		readsize = readlink(path, buf, bufsize); /* 1st try */
+		readsize = readlink(path, buf, bufsize);
 		if (readsize == -1) {
-			bb_perror_msg("%s", path);
 			free(buf);
 			return NULL;
 		}
-	}
-	while (bufsize < readsize + 1);
+	} while (bufsize < readsize + 1);
 
 	buf[readsize] = '\0';
 
 	return buf;
 }
 
+char *xmalloc_readlink_or_warn(const char *path)
+{
+	char *buf = xmalloc_readlink(path);
+	if (!buf) {
+		/* EINVAL => "file: Invalid argument" => puzzled user */
+		bb_error_msg("%s: cannot read link (not a symlink?)", path);
+	}
+	return buf;
+}
+
+/* UNUSED */
+#if 0
 char *xmalloc_realpath(const char *path)
 {
 #if defined(__GLIBC__) && !defined(__UCLIBC__)
@@ -46,3 +55,4 @@ char *xmalloc_realpath(const char *path)
 	return xstrdup(realpath(path, buf));
 #endif
 }
+#endif
diff --git a/networking/isrv.c b/networking/isrv.c
index 1a41dd4fb..080c60fbd 100644
--- a/networking/isrv.c
+++ b/networking/isrv.c
@@ -21,20 +21,6 @@
 
 /* Helpers */
 
-/* Even if _POSIX_MONOTONIC_CLOCK is defined, this
- * may require librt */
-#if 0 /*def _POSIX_MONOTONIC_CLOCK*/
-static time_t monotonic_time(void)
-{
-	struct timespec ts;
-	if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
-		time(&ts.tv_sec);
-	return ts.tv_sec;
-}
-#else
-#define monotonic_time() (time(NULL))
-#endif
-
 /* Opaque structure */
 
 struct isrv_state_t {
@@ -258,7 +244,7 @@ static void handle_fd_set(isrv_state_t *state, fd_set *fds, int (*h)(int, void *
 			/* this peer is gone */
 			remove_peer(state, peer);
 		} else if (TIMEOUT) {
-			TIMEO_TBL[peer] = monotonic_time();
+			TIMEO_TBL[peer] = monotonic_sec();
 		}
 	}
 }
@@ -335,7 +321,7 @@ void isrv_run(
 			break;
 
 		if (timeout) {
-			time_t t = monotonic_time();
+			time_t t = monotonic_sec();
 			if (t != CURTIME) {
 				CURTIME = t;
 				handle_timeout(state, do_timeout);
diff --git a/runit/runsv.c b/runit/runsv.c
index baef6e13f..b35c26630 100644
--- a/runit/runsv.c
+++ b/runit/runsv.c
@@ -33,6 +33,34 @@ ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "libbb.h"
 #include "runit_lib.h"
 
+#if ENABLE_MONOTONIC_SYSCALL
+#include <sys/syscall.h>
+
+/* libc has incredibly messy way of doing this,
+ * typically requiring -lrt. We just skip all this mess */
+static void gettimeofday_ns(struct timespec *ts)
+{
+	syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
+}
+#else
+static void gettimeofday_ns(struct timespec *ts)
+{
+	if (sizeof(struct timeval) == sizeof(struct timespec)
+	 && sizeof(((struct timeval*)ts)->tv_usec) == sizeof(ts->tv_nsec)
+	) {
+		/* Cheat */
+		gettimeofday((void*)ts, NULL);
+		ts->tv_nsec *= 1000;
+	} else {
+		extern void BUG_need_to_implement_gettimeofday_ns(void);
+		BUG_need_to_implement_gettimeofday_ns();
+	}
+}
+#endif
+
+/* Compare possibly overflowing unsigned counters */
+#define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
+
 static int selfpipe[2];
 
 /* state */
@@ -126,14 +154,6 @@ static int rename_or_warn(const char *old, const char *new)
 	return 0;
 }
 
-#define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0)
-
-#include <sys/syscall.h>
-static void gettimeofday_ns(struct timespec *ts)
-{
-	syscall(__NR_clock_gettime, CLOCK_REALTIME, ts);
-}
-
 static void update_status(struct svdir *s)
 {
 	ssize_t sz;
diff --git a/scripts/trylink b/scripts/trylink
index 4eaa334d5..0b8f6c062 100755
--- a/scripts/trylink
+++ b/scripts/trylink
@@ -14,37 +14,30 @@ try() {
 BBOX_LIB_LIST=`echo "$BBOX_LIB_LIST" | xargs -n1 | sort | uniq | xargs`
 
 # First link with all libs. If it fails, bail out
-l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/'`
 echo "Trying libraries: $BBOX_LIB_LIST"
-try "-Wl,--start-group $l_list -Wl,--end-group" "$@" \
+l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
+test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
+try "$l_list" "$@" \
 || {
     echo "Failed: $* -Wl,--start-group $l_list -Wl,--end-group"
     cat busybox_ld.err
     exit 1
 }
 
-#### Hack disabled: conflicts with ld --verbose flag in last link phase
-
-##### Hack: we are not supposed to know executable name,
-##### but this hack cuts down link time
-####mv busybox_unstripped busybox_unstripped.tmp
-####mv busybox.map        busybox.map.tmp
-
 # Now try to remove each lib and build without it.
 # Stop when no lib can be removed.
-####ever_discarded=false
 while test "$BBOX_LIB_LIST"; do
     $debug && echo "Trying libraries: $BBOX_LIB_LIST"
     all_needed=true
     for one in $BBOX_LIB_LIST; do
 	without_one=`echo " $BBOX_LIB_LIST " | sed "s/ $one / /g" | xargs`
-	l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/'`
-	$debug && echo "Trying -l options: $l_list"
-	if try "-Wl,--start-group $l_list -Wl,--end-group" "$@"; then
+	l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
+	test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
+	$debug && echo "Trying -l options: '$l_list'"
+	if try "$l_list" "$@"; then
 		echo "Library $one is not needed"
 		BBOX_LIB_LIST="$without_one"
 		all_needed=false
-####		ever_discarded=true
 	else
 		echo "Library $one is needed"
 	fi
@@ -57,24 +50,19 @@ while test "$BBOX_LIB_LIST"; do
     #{ echo "$BBOX_LIB_LIST" | grep -q ' '; } || break
 done
 
-####mv busybox_unstripped.tmp busybox_unstripped
-####mv busybox.map.tmp        busybox.map
-####$ever_discarded && {
-    # Make the binary with final, minimal list of libs
-    echo "Final link with: $BBOX_LIB_LIST"
-    l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/'`
-    # --verbose gives us gobs of info to stdout (e.g. linker script used)
-    if ! test -f busybox_ldscript; then
-	try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose" "$@" >busybox_ld.out ####|| exit 1
-    else
-	echo "Custom linker script 'busybox_ldscript' found, using it"
-	# Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out):
-	#  .rodata         : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) }
-	#  *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*)
-	#  *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*)
-	# This will eliminate most of the data padding (~3kb).
-	try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out
-    fi
-####}
-####rm busybox_ld.err
-####exit 0  # Ensure "success" exit code
+# Make the binary with final, minimal list of libs
+echo "Final link with: $BBOX_LIB_LIST"
+l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
+test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose"
+# --verbose gives us gobs of info to stdout (e.g. linker script used)
+if ! test -f busybox_ldscript; then
+    try "$l_list -Wl,--verbose" "$@" >busybox_ld.out
+else
+    echo "Custom linker script 'busybox_ldscript' found, using it"
+    # Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out):
+    #  .rodata         : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) }
+    #  *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*)
+    #  *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*)
+    # This will eliminate most of the data padding (~3kb).
+    try "$l_list -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out
+fi