Performance issues when initiating a new PTY on systems with high FD limits

[rphsoftware]

When running on a system with a very high file descriptor limit, the library will take extreme amounts of time to initialize a new PTY properly. The culprit appears to be the following block of code:

pty4j/native/exec_pty.c

Lines 125 to 131 in 7bcaeb6

	{
	int fdlimit = sysconf(_SC_OPEN_MAX);
	int fd = 3;
	while (fd < fdlimit)
	close(fd++);
	}

A better solution on machines with the /proc filesystem available would be to perhaps try only closing file descriptors that are actually open?

[kprintf]

Related PR #124

[mbiebl]

Should be fixed by #149

[segrey]

Thank you for reporting and sorry for the delay. Should be fixed by 04685d8 and available since pty4j version 0.12.27.