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Date: | Fri, 6 Mar 2015 20:07:10 +0900 |
From: | Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> |
To: | cygwin AT cygwin DOT com |
Subject: | Re: PTY dies when master in parent process is closed. |
Message-Id: | <20150306200710.1264a46aa8dd633943e56212@nifty.ne.jp> |
In-Reply-To: | <20150305135839.GZ3213@calimero.vinschen.de> |
References: | <20150305215323 DOT 760df4752fdbd6f19a931851 AT nifty DOT ne DOT jp> <20150305133100 DOT GY3213 AT calimero DOT vinschen DOT de> <20150305135839 DOT GZ3213 AT calimero DOT vinschen DOT de> |
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On Thu, 5 Mar 2015 14:58:39 +0100 Corinna Vinschen <corinna-cygwin AT cygwin DOT com> wrote: > I applied a patch. Please have a look. I have tested the latest CVS version, and found a new problem. With new CVS version, slave side can not detect closure of master. Please use following Test Case 3. Test Case 3 is not terminated by itself with latest CVS. It seems that the program is stopping at cygwait(input_available_event, time_to_wait) in fhandler_pty_slave::read(). I guess input_available_event should be set when the last valid master fd is closed. /***************/ /* Test Case 3 */ /***************/ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <termios.h> #include <sys/ioctl.h> #include <pty.h> #include <wait.h> int main() { int master, slave; pid_t pid; if ( openpty(&master, &slave, NULL, NULL, NULL) < 0) { perror("openpty()"); exit(EXIT_FAILURE); } pid = fork(); if (pid < 0) { perror("fork()"); exit(EXIT_FAILURE); } if (pid != 0) { /* Parent */ close(slave); write(master, "0123456789\n", 11); usleep(100000); /* wait for slave read() */ close(master); wait(NULL); } else { /* Child */ close(master); for (;;) { char buf[BUFSIZ]; int len = read(slave, buf, sizeof(buf)); if (len <= 0) { perror("read()"); break; } write(STDOUT_FILENO, buf, len); } close(slave); } return EXIT_SUCCESS; } -- Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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