Date: Mon, 19 Mar 2001 18:57:00 -0600 From: "Christopher Leigh" <clcont@gmx.net> To: <lucas@slb.to> Cc: <freebsd-questions@freebsd.org> Subject: Re: uhm. why isn't there a vigr for freebsd? Message-ID: <005801c0b0d8$ac851040$ca83a7d8@king1> References: <200103190333.f2J3XDe33615@grumpy.dyndns.org> <000f01c0b02f$191482e0$fa87a7d8@king1> <20010319120014.A3274@billygoat.slb.to>
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thank you again. so. is there a way to get it to waste less memory? ----- Original Message ----- From: Lucas Bergman <lucas@slb.to> To: Christopher Leigh <clcont@gmx.net> Cc: <freebsd-questions@freebsd.org> Sent: Monday, March 19, 2001 12:00 PM Subject: Re: uhm. why isn't there a vigr for freebsd? > > i still like typing vigr. (linux spoils me...) > > Whatever. > > > i guess > > > > #!/bin/sh > > vi /etc/group > > > > will have to suffice. :) > > > > any security concerns in doing that? > > Good enough. No security problems unless the script is setuid, > setgid, or something like that. > > > could i do > > > > #!/bin/sh > > exec vi /etc/group > > Yes. > > > what's the difference? > > The second method saves one process. In the first example, you have > > (1) /bin/sh process (say, x) starts, taking commands from your script > (2) process x starts a new process y, which runs 'vi' > (3) when you're done editing, process y exits > (4) process x looks for more commands, hits end of file, so process x > exits > > In the second example, you have > > (1) /bin/sh process (say, x) starts, taking commands from your script > (2) process x runs 'vi' (no new process is created) > (3) when you're done editing, process x exits > > To use some lingo, using the 'exec' shell builtin means the current > shell's process is *replaced* with the command that follows. Clearly, > this implies no further commands in the script get executed after an > 'exec' is run. See this by running > > #! /bin/sh > exec echo first > echo second > > > ty. > > yw. > > Lucas > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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