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copy.c: improve a comment

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* src/copy.c (copy_reg): The comment about POSIXLY_CORRECT refers
only to cp, not to any other application that uses copy.c.
This commit is contained in:
Jim Meyering 2010-02-07 21:02:18 +01:00
parent 543696a9af
commit ed509250a2
1 changed files with 5 additions and 4 deletions
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src/copy.c
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@ -587,10 +587,11 @@ copy_reg (char const *src_name, char const *dst_name,
lstat'ing the DST_NAME shows that it is a symlink, then we
have a problem: trying to resolve this dangling symlink to
a directory/destination-entry pair is fundamentally racy,
so punt. If POSIXLY_CORRECT is set, simply call open again,
but without O_EXCL (potentially dangerous). If not, fail
with a diagnostic. These shenanigans are necessary only
when copying, i.e., not in move_mode. */
so punt. If x->open_dangling_dest_symlink is set (cp sets
that when POSIXLY_CORRECT is set in the environment), simply
call open again, but without O_EXCL (potentially dangerous).
If not, fail with a diagnostic. These shenanigans are necessary
only when copying, i.e., not in move_mode. */
if (dest_desc < 0 && dest_errno == EEXIST && ! x->move_mode)
{
struct stat dangling_link_sb;