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-rw-r--r--toys/posix/cp.c39
1 files changed, 36 insertions, 3 deletions
diff --git a/toys/posix/cp.c b/toys/posix/cp.c
index 1a7b16ca..9260d04b 100644
--- a/toys/posix/cp.c
+++ b/toys/posix/cp.c
@@ -5,6 +5,9 @@
* And http://refspecs.linuxfoundation.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic.html#INSTALL
*
* Posix says "cp -Rf dir file" shouldn't delete file, but our -f does.
+ *
+ * TODO: --preserve=links
+ * TODO: what's this _CP_mode system.posix_acl_ business? We chmod()?
// options shared between mv/cp must be in same order (right to left)
// for FLAG macros to work out right in shared infrastructure.
@@ -25,7 +28,7 @@ config CP
-f delete destination files we can't write to
-F delete any existing destination file first (--remove-destination)
-i interactive, prompt before overwriting existing DEST
- -p preserve timestamps, ownership, and permissions
+ -p preserve timestamps, ownership, and mode
-R recurse into subdirectories (DEST must be a directory)
-H Follow symlinks listed on command line
-L Follow all symlinks
@@ -51,7 +54,7 @@ config CP_PRESERVE
default y
depends on CP_MORE
help
- usage: cp [--preserve=mota]
+ usage: cp [--preserve=motcxa]
--preserve takes either a comma separated list of attributes, or the first
letter(s) of:
@@ -59,6 +62,8 @@ config CP_PRESERVE
mode - permissions (ignore umask for rwx, copy suid and sticky bit)
ownership - user and group
timestamps - file creation, modification, and access times.
+ context - security context
+ xattr - extended attributes
all - all of the above
config MV
@@ -102,6 +107,9 @@ config INSTALL
#define FOR_cp
#include "toys.h"
+#if CFG_CP_PRESERVE
+#include <sys/xattr.h>
+#endif
GLOBALS(
union {
@@ -127,7 +135,7 @@ GLOBALS(
struct cp_preserve {
char *name;
} static const cp_preserve[] = TAGGED_ARRAY(CP,
- {"mode"}, {"ownership"}, {"timestamps"}
+ {"mode"}, {"ownership"}, {"timestamps"}, {"context"}, {"xattr"},
);
// Callback from dirtree_read() for each file/directory under a source dir.
@@ -282,6 +290,31 @@ int cp_node(struct dirtree *try)
xsendfile(fdin, fdout);
err = 0;
}
+
+ // We only copy xattrs for files because there's no flistxattrat()
+ if (TT.pflags&(_CP_xattr|_CP_context)) {
+ ssize_t listlen = flistxattr(fdin, 0, 0), len;
+ char *name, *value, *list;
+
+ if (listlen>0) {
+ list = xmalloc(listlen);
+ flistxattr(fdin, list, listlen);
+ list[listlen-1] = 0; // I do not trust this API.
+ for (name = list; name-list < listlen; name += strlen(name)+1) {
+ if (!(TT.pflags&_CP_xattr) && strncmp(name, "security.", 9))
+ continue;
+ if ((len = fgetxattr(fdin, name, 0, 0))>0) {
+ value = xmalloc(len);
+ if (len == fgetxattr(fdin, name, value, len))
+ if (fsetxattr(fdout, name, value, len, 0))
+ perror_msg("%s setxattr(%s=%s)", catch, name, value);
+ free(value);
+ }
+ }
+ free(list);
+ }
+ }
+
close(fdin);
}
} while (err && (flags & (FLAG_f|FLAG_n)) && !unlinkat(cfd, catch, 0));