unlinks an existing destination before trying to open it for writing.
Otherwise, installing onto a running shared library would make the
running program malfunction.
slash from one partition to another, and giving it a different
name at the destination would cause mv to get a failed assertion.
Reported by Michael Stone.
(strip_trailing_slashes_2): Move function definition to precede new first use.
(cp_option_init): Initialize new members.
(usage): Reflect the fact that --force (-f) relates only to whether
mv prompts.
(main): Remove uses of old `force' option member.
[long_options]: Add an entry for --remove-destination.
(usage): Describe --remove-destination.
(do_copy): Use unlink_dest_after_failed_open member, not `force.'
(cp_option_init): Initialize new members.
(main): Handle UNLINK_DEST_BEFORE_OPENING (aka --remove-destination).
and partially rewritten.
(copy_internal): Unlink destination file when unlink_dest_before_opening
option is set, and when the source is neither a regular file nor a directory.
Remove the SPARSE_MODE parameter. Update caller.
Perform POSIX-mandated (for cp) open-with-O_WRONLY|O_TRUNC when
the regular destination file exists; upon failure, unlink
that existing file, then open again, but with O_WRONLY|O_CREAT.
(copy_internal): `force' in not related to interactive; remove
the conjunct.
Remove the entire `else if (x->force)' block; justifying
removal of the non-directory part is easy: POSIX requires we try
to open an existing regular file, so we can't unlink it beforehand.
The part that changes the mode on a directory to allow overwriting
isn't necessary.
(buggy_lseek_support): New function.
(skip): Use it.
Frank Adler reported that although _llseek returns 0, lseek
erroneously returns an offset suggesting the operation succeeded
even though it fails.
(usage): Describe -L and -H.
(cp_option_init): Initialize to DEREF_UNDEFINED, not `1'.
(main): Add `H' and `-L' to getopt spec string.
[case 'a']: Initialize `dereference' to DEREF_NEVER, not 0.
[case 'd']: Likewise.
[case 'H']: New case.
[case 'L']: New case.
[case 'R']: Don't set dereference to `0' here.
If it's not yet defined, set x.dereference to DEREF_NEVER
if -R was specified, else set it to DEREF_ALWAYS.
Set x.xstat accordingly for -H.
(copy_dir): Set `xstat' member to lstat so that with `-H' we don't
follow symlinks found via recursive traversal.
Update uses of `dereference' to compare against new enum member names.
POSIX.2 requires that cp -p and mv attempt to set the uid of the
destination file, even if you're not root. This affects behavior
only on hosts that let you give files away via chmod.
the scope where it's used.
(copy_internal): In calling copy_reg, pass not the raw `src_mode',
but the possibly-umask-relative mode, `get_dest_mode (x, src_mode)'.
Jim Meyering