Date: Fri, 7 Mar 2003 09:26:03 -0600 From: Mike Meyer <mwm-dated-1047482763.9f03ea@mired.org> To: "J. Seth Henry" <jshenry@comcast.net> Cc: questions@freebsd.org Subject: Re: Looking for POSIX programming resources Message-ID: <15976.47627.94120.968450@guru.mired.org> In-Reply-To: <20030306150225.S940-100000@whitetower.gambrl01.md.comcast.net> References: <20030306150225.S940-100000@whitetower.gambrl01.md.comcast.net>
next in thread | previous in thread | raw e-mail | index | archive | help
This really belongs on something like comp.lang.unix, but hey... In <20030306150225.S940-100000@whitetower.gambrl01.md.comcast.net>, J. Seth Henry <jshenry@comcast.net> typed: > In summary, can anyone help me write code that: > 1) puts my daemon to sleep, awaking only when either a timer has expired, > data has arrived one of the controlled serial ports, or the user has > invoked some interface from a script or command line utility. Select on Posix. kqueue on FreeBSD is more flexible though. > 2) Daemonizes my program (dissasociating itself from the terminal) See the daemon function, though I'm not sure if it's posix-compliant. The man page describes what it does, though. > 3) Accepts commands and/or data from scripts or command line utilities. popen is the call you want. > 4) Call other programs, and pass them parameters. popen if you want to read their output or send them input. system if you don't. fork and exec* for absolute control. > 5) Read the system clock. time(3). <mike -- Mike Meyer <mwm@mired.org> http://www.mired.org/consulting.html Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?15976.47627.94120.968450>