зеркало из https://github.com/microsoft/git.git
9a780a384d
By default, CreateProcess() does not inherit any open file handles, unless the bInheritHandles parameter is set to TRUE. Which we do need to set because we need to pass in stdin/stdout/stderr to talk to the child processes. Sadly, this means that all file handles (unless marked via O_NOINHERIT) are inherited. This lead to problems in VFS for Git, where a long-running read-object hook is used to hydrate missing objects, and depending on the circumstances, might only be called *after* Git opened a file handle. Ideally, we would not open files without O_NOINHERIT unless *really* necessary (i.e. when we want to pass the opened file handle as standard handle into a child process), but apparently it is all-too-easy to introduce incorrect open() calls: this happened, and prevented updating a file after the read-object hook was started because the hook still held a handle on said file. Happily, there is a solution: as described in the "Old New Thing" https://blogs.msdn.microsoft.com/oldnewthing/20111216-00/?p=8873 there is a way, starting with Windows Vista, that lets us define precisely which handles should be inherited by the child process. And since we bumped the minimum Windows version for use with Git for Windows to Vista with v2.10.1 (i.e. a *long* time ago), we can use this method. So let's do exactly that. We need to make sure that the list of handles to inherit does not contain duplicates; Otherwise CreateProcessW() would fail with ERROR_INVALID_ARGUMENT. While at it, stop setting errno to ENOENT unless it really is the correct value. Also, fall back to not limiting handle inheritance under certain error conditions (e.g. on Windows 7, which is a lot stricter in what handles you can specify to limit to). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com> |
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| apple-common-crypto.h | ||
| basename.c | ||
| bswap.h | ||
| fileno.c | ||
| fopen.c | ||
| gmtime.c | ||
| hstrerror.c | ||
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| mingw.c | ||
| mingw.h | ||
| mkdir.c | ||
| mkdtemp.c | ||
| mmap.c | ||
| msvc.c | ||
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| obstack.c | ||
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| pread.c | ||
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| qsort_s.c | ||
| setenv.c | ||
| sha1-chunked.c | ||
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| stat.c | ||
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| terminal.c | ||
| terminal.h | ||
| unsetenv.c | ||
| win32.h | ||
| win32mmap.c | ||
| winansi.c | ||