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2000-04-03 H.J. Lu <hjl@gnu.org> 

* cache.c (bfd_open_file): Unlink the output file only if
	it has none zero size.
This commit is contained in:
Ian Lance Taylor 2000-04-03 19:19:11 +00:00
parent d61e6540a1
commit 9e422a2e27
2 changed files with 24 additions and 4 deletions
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5
bfd/ChangeLog
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@ -1,3 +1,8 @@
2000-04-03 H.J. Lu <hjl@gnu.org>
* cache.c (bfd_open_file): Unlink the output file only if
it has none zero size.
2000-04-01 Ken Block USG <block@zk3.dec.com>
* elf64-alpha.c (elf64_alpha_relocate_section): Don't emit

23
bfd/cache.c
View File

@ -285,10 +285,25 @@ bfd_open_file (abfd)
}
else
{
/* Create the file. Unlink it first, for the convenience of
operating systems which worry about overwriting running
binaries. */
unlink (abfd->filename);
/* Create the file.
Some operating systems won't let us overwrite a running
binary. For them, we want to unlink the file first.
However, gcc 2.95 will create temporary files using
O_EXCL and tight permissions to prevent other users from
substituting other .o files during the compilation. gcc
will then tell the assembler to use the newly created
file as an output file. If we unlink the file here, we
open a brief window when another user could still
substitute a file.
So we unlink the output file if and only if it has
non-zero size. */
struct stat s;
if (stat (abfd->filename, &s) == 0 && s.st_size != 0)
unlink (abfd->filename);
abfd->iostream = (PTR) fopen (abfd->filename, FOPEN_WB);
abfd->opened_once = true;
}