diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/posix/cp.c | 39 |
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)); |