Date: Sun, 3 Sep 2006 20:58:15 GMT From: Andreas Longwitz <longwitz@incore.de> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/102834: /usr/bin/mail hangs on the sigsuspend system call in popen.c Message-ID: <200609032058.k83KwFH8015301@www.freebsd.org> Resent-Message-ID: <200609032100.k83L0d9D011715@freefall.freebsd.org>
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>Number: 102834
>Category: bin
>Synopsis: /usr/bin/mail hangs on the sigsuspend system call in popen.c
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Sep 03 21:00:39 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Andreas Longwitz
>Release: FreeBSD 6.1
>Organization:
Data Service Stockelsdorf, Germany
>Environment:
FreeBSD loserver.longwitz 6.1-RELEASE FreeBSD 6.1-RELEASE #0: Tue May 23 22:16:05 CEST 2006 root@loserver.longwitz:/usr/src/sys/i386/compile/LOSERVER i386
>Description:
Sometimes the command /usr/bin/mail -s subject mailadr hangs on the sigsuspend system call in popen.c. This happens when the function findchild() running from wait_child() is interrupted by sigchild() running findchild() again. This happens when the child started just before exits too quickly.
>How-To-Repeat:
>Fix:
In popen.c (functions free_child() and wait_child()) the line
struct child *cp = findchild(pid);
must be moved after the 3 sigfunction-calls.
>Release-Note:
>Audit-Trail:
>Unformatted:
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