Date: Sat, 7 Aug 2010 15:08:02 GMT From: Marcin Wisnicki <mwisnicki+freebsd@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/149403: truss hangs when user input is requested Message-ID: <201008071508.o77F82Lb077287@www.freebsd.org> Resent-Message-ID: <201008071510.o77FA4EA077525@freefall.freebsd.org>
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>Number: 149403
>Category: bin
>Synopsis: truss hangs when user input is requested
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Aug 07 15:10:04 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Marcin Wisnicki
>Release: 8.1-PRERELEASE
>Organization:
>Environment:
FreeBSD ghost.pnet.one.pl 8.1-PRERELEASE FreeBSD 8.1-PRERELEASE #4: Wed Jul 14 21:47:49 CEST 2010 root@ghost.pnet.one.pl:/home/obj/usr/src/sys/SERWER_DDB i386
>Description:
When monitored program requests user input, truss hangs. Only way to recover is to kill it with SIGKILL. Problem occurs regardless of '-S', '-o' or '-c' flags.
>How-To-Repeat:
# this one is ok
% truss read abc < /dev/null
..
__getcwd("/home/marcin",256) = 0 (0x0)
read(10,"#!/bin/sh\n# $FreeBSD: src/usr.b"...,1023) = 161 (0xa1)
read(0,0xbfbfe84b,1) = 0 (0x0)
read(10,0x8065e20,1023) = 0 (0x0)
process exit, rval = 1
# this one is not
% truss read abc
__getcwd("/home/marcin",256) = 0 (0x0)
read(10,"#!/bin/sh\n# $FreeBSD: src/usr.b"...,1023) = 161 (0xa1)
SIGNAL 21 (SIGTTIN)
# ^T
load: 0.18 cmd: truss 11847 [wait] 1.40r 0.06u 0.04s 0% 1176k
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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