Date: Tue, 9 Feb 1999 13:39:24 -0800 (PST) From: hansen@cmu.edu To: freebsd-gnats-submit@FreeBSD.ORG Subject: bin/9986: rsh hangs when called by system() from process with eleven open files. Message-ID: <199902092139.NAA11115@hub.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 9986 >Category: bin >Synopsis: rsh hangs when called by system() from process with eleven open files. >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Feb 9 13:40:00 PST 1999 >Closed-Date: >Last-Modified: >Originator: Jeffery Hansen >Release: 3.0 >Organization: Carnegie Mellon University >Environment: FreeBSD gadoid.ices.cmu.edu 3.0-RELEASE FreeBSD 3.0-RELEASE #0: Mon Dec 7 09:56:02 EST 1998 hansen@gadoid.ices.cmu.edu:/usr/src/sys/compile/SAWAKO i386 >Description: When rsh is invoked using system(), the call to system() will hang indefinately if too many (eleven or more in addition to stdin, etc.) files are open. More specifically the problem occurs when fewer than three of the file descriptors in the range 0-15 are unused. >How-To-Repeat: for (i = 0;i < 11;i++) /* OK if 10 or lower */ fopen("/dev/null","r"); system("rsh foo.bar.org any-command"); >Fix: The problem appears to be the hard-coded value of 16 for nfds in the calls to select() in rsh.c. This needs to be fixed to reflect the actual values of the file descriptors selected on. >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199902092139.NAA11115>