diff options
Diffstat (limited to 'libarchive/filter_fork_windows.c')
| -rw-r--r-- | libarchive/filter_fork_windows.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/libarchive/filter_fork_windows.c b/libarchive/filter_fork_windows.c index 8d11179f307e..0b963975b90d 100644 --- a/libarchive/filter_fork_windows.c +++ b/libarchive/filter_fork_windows.c @@ -31,6 +31,43 @@ #include "filter_fork.h" +/* There are some editions of Windows ("nano server," for example) that + * do not host user32.dll. If we want to keep running on those editions, + * we need to delay-load WaitForInputIdle. */ +static void * +la_GetFunctionUser32(const char *name) +{ + static HINSTANCE lib; + static int set; + if (!set) { + set = 1; + lib = LoadLibrary(TEXT("user32.dll")); + } + if (lib == NULL) { + return NULL; + } + return (void *)GetProcAddress(lib, name); +} + +static int +la_WaitForInputIdle(HANDLE hProcess, DWORD dwMilliseconds) +{ + static DWORD (WINAPI *f)(HANDLE, DWORD); + static int set; + + if (!set) { + set = 1; + f = la_GetFunctionUser32("WaitForInputIdle"); + } + + if (!f) { + /* An inability to wait for input idle is + * not _good_, but it is not catastrophic. */ + return WAIT_FAILED; + } + return (*f)(hProcess, dwMilliseconds); +} + int __archive_create_child(const char *cmd, int *child_stdin, int *child_stdout, HANDLE *out_child) @@ -149,7 +186,7 @@ __archive_create_child(const char *cmd, int *child_stdin, int *child_stdout, if (CreateProcessA(fullpath.s, cmdline.s, NULL, NULL, TRUE, 0, NULL, NULL, &staInfo, &childInfo) == 0) goto fail; - WaitForInputIdle(childInfo.hProcess, INFINITE); + la_WaitForInputIdle(childInfo.hProcess, INFINITE); CloseHandle(childInfo.hProcess); CloseHandle(childInfo.hThread); |