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| From | Nobody <nobody@nowhere.com> |
|---|---|
| Subject | Re: Wrapping existing UNIX commands in C |
| Date | 2012-07-31 14:53 +0100 |
| Message-Id | <pan.2012.07.31.13.53.43.808000@nowhere.com> |
| Newsgroups | comp.lang.c |
| References | <jv3jqk$r1t$1@speranza.aioe.org> <jv3q1s$c09$1@dont-email.me> <pan.2012.07.30.11.13.25.146000@nowhere.com> <jv5r18$o93$1@speranza.aioe.org> |
| Organization | Zen Internet |
On Mon, 30 Jul 2012 13:26:34 +0200, jacob navia wrote: >> I have seen real-world code which did: >> >> char buf[100]; >> sprintf(buf, "rm %s", filename); >> system(buf); > > Yes, the hard coded buffer size is a problem but in principle > this thing will work as intended. The lack of quoting/escaping is a bigger problem than the fixed buffer size. Apart from the need to protect against interpretation by the shell, "rm" will interpret the argument as an option if it begins with a dash. Using a relative path to "rm" means that it may run something other than /bin/rm. And performance is several orders of magnitude worse than remove() or unlink() (fork() and/or exec() can be particularly expensive). At least system() usually does the right thing with respect to signals; the situation for popen() is much more complex.
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Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-07-29 16:11 +0100
Re: Wrapping existing UNIX commands in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-07-29 11:18 -0400
Re: Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-07-29 16:24 +0100
Re: Wrapping existing UNIX commands in C "China Blue [Tor], Meersburg" <chine.bleu@yahoo.com> - 2012-07-29 08:34 -0700
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-07-29 12:05 -0700
Re: Wrapping existing UNIX commands in C "China Blue [Tor], Meersburg" <chine.bleu@yahoo.com> - 2012-07-29 14:00 -0700
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-07-29 15:19 -0700
Re: Wrapping existing UNIX commands in C Rui Maciel <rui.maciel@gmail.com> - 2012-07-30 00:35 +0100
Re: Wrapping existing UNIX commands in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-07-30 14:54 +0000
Re: Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-07-30 17:15 +0100
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-07-30 12:44 -0400
Re: Wrapping existing UNIX commands in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-08-02 13:51 +0000
Re: Wrapping existing UNIX commands in C jacob navia <jacob@spamsink.net> - 2012-07-30 11:13 +0200
Re: Wrapping existing UNIX commands in C Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-07-30 01:59 -0700
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-07-29 17:10 +0000
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-07-31 14:55 -0700
Re: Wrapping existing UNIX commands in C jacob navia <jacob@spamsink.net> - 2012-08-01 00:24 +0200
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-08-02 06:12 -0700
Re: Wrapping existing UNIX commands in C "Heinrich Wolf" <invalid@invalid.invalid> - 2012-07-29 17:20 +0200
Re: Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-07-29 16:24 +0100
Re: Wrapping existing UNIX commands in C Ike Naar <ike@sverige.freeshell.org> - 2012-07-29 21:41 +0000
Re: Wrapping existing UNIX commands in C "Heinrich Wolf" <invalid@invalid.invalid> - 2012-07-30 06:46 +0200
Re: Wrapping existing UNIX commands in C "Heinrich Wolf" <invalid@invalid.invalid> - 2012-07-30 06:49 +0200
Re: Wrapping existing UNIX commands in C "China Blue [Tor], Meersburg" <chine.bleu@yahoo.com> - 2012-07-29 08:31 -0700
Re: Wrapping existing UNIX commands in C Ike Naar <ike@sverige.freeshell.org> - 2012-07-29 21:46 +0000
Re: Wrapping existing UNIX commands in C Stephen Sprunk <stephen@sprunk.org> - 2012-07-29 11:57 -0500
Re: Wrapping existing UNIX commands in C Nobody <nobody@nowhere.com> - 2012-07-30 12:13 +0100
Re: Wrapping existing UNIX commands in C jacob navia <jacob@spamsink.net> - 2012-07-30 13:26 +0200
Re: Wrapping existing UNIX commands in C Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-07-30 12:39 +0100
Re: Wrapping existing UNIX commands in C Mark Bluemel <mark_bluemel@pobox.com> - 2012-07-30 13:16 +0100
Re: Wrapping existing UNIX commands in C BGB <cr88192@hotmail.com> - 2012-07-30 12:39 -0500
Re: Wrapping existing UNIX commands in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-07-30 15:02 +0000
Re: Wrapping existing UNIX commands in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-07-30 15:18 +0000
Re: Wrapping existing UNIX commands in C Nobody <nobody@nowhere.com> - 2012-07-31 14:53 +0100
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-08-02 06:21 -0700
Re: Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-07-30 18:10 +0100
Re: Wrapping existing UNIX commands in C Paul <nospam@needed.com> - 2012-07-30 13:30 -0400
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-07-30 13:34 -0400
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-15 21:21 +0000
Re: Wrapping existing UNIX commands in C Stephen Sprunk <stephen@sprunk.org> - 2012-08-15 17:17 -0500
Re: Wrapping existing UNIX commands in C Stephen Sprunk <stephen@sprunk.org> - 2012-07-30 13:18 -0500
Re: Wrapping existing UNIX commands in C Cal Dershowitz <cal@example.invalid> - 2012-08-01 21:08 -0600
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-02 12:20 +0000
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-08-02 06:15 -0700
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-02 14:16 +0000
Re: Wrapping existing UNIX commands in C Kenneth Brody <kenbrody@spamcop.net> - 2012-08-02 11:33 -0400
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-08-02 11:51 -0700
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-02 15:03 -0700
Re: Wrapping existing UNIX commands in C tom st denis <tom@iahu.ca> - 2012-08-02 18:46 -0700
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-03 02:18 +0000
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-02 21:07 -0700
Re: Wrapping existing UNIX commands in C Chicken McNuggets <chicken@mcnuggets.com> - 2012-08-04 10:40 +0100
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-04 03:22 -0700
Re: Wrapping existing UNIX commands in C "Heinrich Wolf" <invalid@invalid.invalid> - 2012-08-04 12:34 +0200
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-04 13:25 +0000
Re: Wrapping existing UNIX commands in C Kenneth Brody <kenbrody@spamcop.net> - 2012-08-15 13:52 -0400
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-04 16:26 -0700
Re: Wrapping existing UNIX commands in C Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-05 03:27 -0700
Re: Wrapping existing UNIX commands in C gwowen <gwowen@gmail.com> - 2012-08-06 01:50 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 07:15 -0400
Re: Wrapping existing UNIX commands in C gwowen <gwowen@gmail.com> - 2012-08-06 04:25 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 09:14 -0400
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-06 14:14 +0000
Re: Wrapping existing UNIX commands in C gwowen <gwowen@gmail.com> - 2012-08-06 07:43 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 11:52 -0400
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-06 11:37 -0700
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-06 11:34 -0700
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-06 11:53 -0700
Re: Wrapping existing UNIX commands in C gwowen <gwowen@gmail.com> - 2012-08-07 00:33 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-07 06:44 -0400
Re: Wrapping existing UNIX commands in C gwowen <gwowen@gmail.com> - 2012-08-07 05:15 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-07 08:37 -0400
Re: Wrapping existing UNIX commands in C Neil Cerutti <neilc@norwich.edu> - 2012-08-07 13:04 +0000
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-07 12:57 -0700
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-07 21:24 +0000
Re: Wrapping existing UNIX commands in C Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-08 00:58 -0700
Re: Wrapping existing UNIX commands in C "BartC" <bc@freeuk.com> - 2012-08-06 18:04 +0100
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-06 18:24 +0000
Re: Wrapping existing UNIX commands in C jgk@panix.com (Joe keane) - 2012-08-22 17:08 +0000
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 14:46 -0400
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-06 11:55 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 19:13 -0400
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-08-06 11:50 -0700
Re: Wrapping existing UNIX commands in C "BartC" <bc@freeuk.com> - 2012-08-06 20:28 +0100
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-08-06 15:44 -0400
Re: Wrapping existing UNIX commands in C Robert Miles <milesrf@Usenet-News.net> - 2012-09-09 22:46 -0500
Re: Wrapping existing UNIX commands in C Kaz Kylheku <kaz@kylheku.com> - 2012-09-10 04:29 +0000
Re: Wrapping existing UNIX commands in C Keith Thompson <kst-u@mib.org> - 2012-09-09 22:42 -0700
Re: Wrapping existing UNIX commands in C Kaz Kylheku <kaz@kylheku.com> - 2012-09-10 19:15 +0000
Re: Wrapping existing UNIX commands in C pete <pfiland@mindspring.com> - 2012-09-10 22:25 -0400
Re: Wrapping existing UNIX commands in C Öö Tiib <ootiib@hot.ee> - 2012-09-10 03:10 -0700
Re: Wrapping existing UNIX commands in C James Kuyper <jameskuyper@verizon.net> - 2012-09-10 08:01 -0400
Re: Wrapping existing UNIX commands in C "io_x" <a@b.c.invalid> - 2012-08-07 10:22 +0200
Re: Wrapping existing UNIX commands in C "China Blue [Tor], Meersburg" <chine.bleu@yahoo.com> - 2012-08-07 01:55 -0700
Re: Wrapping existing UNIX commands in C gazelle@shell.xmission.com (Kenny McCormack) - 2012-08-07 21:26 +0000
Re: Wrapping existing UNIX commands in C Rui Maciel <rui.maciel@gmail.com> - 2012-08-08 08:47 +0100
Re: Wrapping existing UNIX commands in C "Ansel" <tinker454@trytospammenowloser.com> - 2012-08-10 21:58 -0600
Re: Wrapping existing UNIX commands in C Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-07 00:07 -0700
Re: Wrapping existing UNIX commands in C Kenneth Brody <kenbrody@spamcop.net> - 2012-08-02 11:27 -0400
Re: Wrapping existing UNIX commands in C Rui Maciel <rui.maciel@gmail.com> - 2012-08-16 09:43 +0100
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