Hi List! I need your help with troubleshooting an issue with "pv": https://codeberg.org/a-j-wood/pv/issues/87
This app uses SIGALRM to interrupt a blocking write to STDOUT and read more data into the buffer. On Linuxes write() returns 0 after the signal, but on Cygwin even though the signal handler is called, the write call does not return, at least when writing to a pipe. In the user guide it says "All sockets are non-blocking under the hood to allow to interrupt blocking calls by POSIX signals". It doesn't mention pipes, but I think the pipes should also be non-blocking under the hood. In main.c the use of O_NONBLOCK is commented with "this can cause problems with (broken) applications such as dd". If I uncomment it the app is able to detect that the pipe is ready for writing. Have you ever heard about O_NONBLOCK breaking dd? -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
