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Delete previous emacs.exe before dumping to fix problem with hard links to it.

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Eli Zaretskii 2013-04-16 21:08:03 +03:00
parent db1ec5b6df
commit 2d0d2952da
1 changed files with 8 additions and 0 deletions
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8
src/unexw32.c
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@ -159,6 +159,14 @@ open_output_file (file_data *p_file, char *filename, unsigned long size)
HANDLE file_mapping;
void *file_base;
/* We delete any existing FILENAME because loadup.el will create a
hard link to it under the name emacs-XX.YY.ZZ.nn.exe. Evidently,
overwriting a file on Unix breaks any hard links to it, but that
doesn't happen on Windows. If we don't delete the file before
creating it, all the emacs-XX.YY.ZZ.nn.exe end up being hard
links to the same file, which defeats the purpose of these hard
links: being able to run previous builds. */
DeleteFile (filename);
file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (file == INVALID_HANDLE_VALUE)