coreutils/src/copy.c, branch v7.5

cp,mv: fix issues with preserving timestamps of copied symlinks

2009-08-14T15:10:53Z

* src/copy.c (copy_internal): On systems without utimensat don't use utimens on a symlink, as that would dereference the symlink. * tests/cp/abuse: To work around possible attribute preservation failures breaking the test, use cp -dR rather than cp -a.

cp: accept the --reflink option

2009-08-07T15:14:22Z

* NEWS: Mention it. * doc/coreutils.texi (cp invocation): Describe it. * src/copy.h (struct cp_options) [reflink]: New member. * src/copy.c (usage): Describe it. (copy_reg): If reflink is true try to clone the file. (main): Check for --reflink. (cp_option_init): Initialize the new member. * src/install.c (cp_option_init): Initialize the new member. * src/mv.c (cp_option_init): Likewise. * tests/cp/sparse: Add a new test case.

cp -pP (and e.g., -a): preserve time stamps on symlinks, too

2009-08-04T15:38:54Z

* src/copy.c (utimensat_if_possible): New function. (copy_internal): Remove variable, "preserve_metadata". Replace with "dest_is_symlink". That covers all cases but one: the one in which cp --link has created hard links to non-directories. In that case, there is no need to update attributes of the links. Use utimensat_if_possible, to preserve timestamps of symlinks. * NEWS (New features): Mention this. * tests/Makefile.am (TESTS): Add cp/preserve-slink-time. * tests/cp/preserve-slink-time: New file. * m4/jm-macros.m4 (coreutils_MACROS): Test for utimensat. Reported in http://bugzilla.redhat.com/230866

cp: support btrfs' copy-on-write file clone operation

2009-07-29T10:15:50Z

* src/copy.c [HAVE_SYS_IOCTL_H]: Include . (BTRFS_IOCTL_MAGIC, BTRFS_IOC_CLONE): Define. (clone_file): New function. (copy_reg): Use the btrfs clone operation if possible.

copy.c: remove a duplicate expression

2009-07-08T21:59:56Z

* src/copy.c (copy_attr_error): remove a redundant expression added in commit e0cf592f, 2009-04-27, "factor out test for errno ...".

copy.c: factor out test for errno value indicating "unsupported"

2009-04-27T11:33:47Z

* src/copy.c (errno_unsupported): New function. (copy_attr_error, copy_internal): Use it.

cp -a: diagnose failure when preserving xattr/context required

2009-04-27T11:33:42Z

* src/copy.c (copy_attr_by_fs): Always print diagnostics when preserving xattrs is required. (copy_attr_by_name): Likewise. (copy_reg): Always print diagnostics when preserving SELinux context is required. (copy_internal): Likewise. Also, do not ignore ENOTSUP and ENODATA errors when preserving SELinux context is required. * NEWS (Bug fixes): Mention it.

mv: ignore xattr-preservation failure when not supported by filesystem

2009-04-27T11:26:03Z

*src/copy.c: Do not warn about xattr-preservation failure when xattrs are not supported and preservation of xattrs is not explicitly required. Reported by Eric Sandeen in http://bugzilla.redhat.com/496142

cp: work around linux kernel bug: short-read != EOF on /proc

2009-04-22T19:52:11Z

Remove the optimization that avoided up to 50% of cp's read syscalls. Do not assume that a short read on a regular file indicates EOF. When reading from a file in /proc on linux [at least 2.6.9 - 2.6.29] into a 4k-byte buffer or larger, a short read does not always indicate EOF. For example, "cp /proc/slabinfo /tmp" copies only 4068 of the total 7493 bytes. This optimization (25719a33154f0c62ea9881f0c79ae312dd4cec7a, Improve performance a bit by optimizing away; 2005-11-24) appears to have been worth less than a 2% speed-up (and usually much less), so the impact of removing it is negligible. * src/copy.c (copy_reg): Don't exit the loop early. * tests/cp/proc-short-read: New test, lightly based on a suggestion from Mike Frysinger, to exercise this fix. * tests/Makefile.am (TESTS): Add cp/proc-short-read. * NEWS (Improve robustness): Mention this change.

cp: make -a option preserve xattrs, but with reduced diagnostics

2009-03-11T16:32:44Z

* copy.c (copy_attr_by_fd): Reduce xattr diagnostics for 'cp -a'. (copy_attr_by_name): Likewise. * cp.c (main): Preserve xattrs with -a option, when possible. * doc/coreutils.texi: Document that xattrs are preserved with cp -a, with no added diagnostics. * NEWS: Mention the change. * tests/misc/xattr: Add tests for 'cp --preserve=all' and 'cp -a'.