Fix pg_truncate() on Windows.
Commit 57faaf376
added pg_truncate(const char *path, off_t length), but
"length" was ignored under WIN32 and the file was unconditionally
truncated to 0.
There was no live bug, since the only caller passes 0.
Fix, and back-patch to 14 where the function arrived.
Author: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20230106031652.GR3109%40telsasoft.com
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@ -642,7 +642,7 @@ pg_truncate(const char *path, off_t length)
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fd = OpenTransientFile(path, O_RDWR | PG_BINARY);
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if (fd >= 0)
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{
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ret = ftruncate(fd, 0);
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ret = ftruncate(fd, length);
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save_errno = errno;
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CloseTransientFile(fd);
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errno = save_errno;
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