commit 776208896756651519fd6540103c73a369b6d485 Author: Alexander Færøy ahf@torproject.org Date: Thu Dec 20 13:12:53 2018 +0100

No need to log ordinary EOF conditions as LOG_WARN.

Let's not use log_warn() when a pipe is closed under what should be considered normal conditions.

See: https://bugs.torproject.org/28179 --- src/lib/process/process_win32.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/lib/process/process_win32.c b/src/lib/process/process_win32.c index 641af2bb0..d8a895875 100644 --- a/src/lib/process/process_win32.c +++ b/src/lib/process/process_win32.c @@ -365,8 +365,17 @@ process_win32_write(struct process_t *process, buf_t *buffer) process_win32_stdin_write_done);

if (! ret) { - log_warn(LD_PROCESS, "WriteFileEx() failed: %s", - format_win32_error(GetLastError())); + error_code = GetLastError(); + + /* No need to log at warning level for these two. */ + if (error_code == ERROR_HANDLE_EOF || error_code == ERROR_BROKEN_PIPE) { + log_debug(LD_PROCESS, "WriteFileEx() returned EOF from pipe: %s", + format_win32_error(error_code)); + } else { + log_warn(LD_PROCESS, "WriteFileEx() failed: %s", + format_win32_error(error_code)); + } + win32_process->stdin_handle.reached_eof = true; return 0; } @@ -897,8 +906,17 @@ process_win32_read_from_handle(process_win32_handle_t *handle, callback);

if (! ret) { - log_warn(LD_PROCESS, "ReadFileEx() failed: %s", - format_win32_error(GetLastError())); + error_code = GetLastError(); + + /* No need to log at warning level for these two. */ + if (error_code == ERROR_HANDLE_EOF || error_code == ERROR_BROKEN_PIPE) { + log_debug(LD_PROCESS, "ReadFileEx() returned EOF from pipe: %s", + format_win32_error(error_code)); + } else { + log_warn(LD_PROCESS, "ReadFileEx() failed: %s", + format_win32_error(error_code)); + } + handle->reached_eof = true; return bytes_available; }