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| From | Stephen Sprunk <stephen@sprunk.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Wrapping existing UNIX commands in C |
| Date | 2012-07-30 13:18 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <jv6j4v$kdk$1@dont-email.me> (permalink) |
| References | <jv3jqk$r1t$1@speranza.aioe.org> <jv3q1s$c09$1@dont-email.me> <jv6f6j$c9n$1@speranza.aioe.org> |
On 30-Jul-12 12:10, Chicken McNuggets wrote: > On 29/07/2012 17:57, Stephen Sprunk wrote: >> If you've already decided to limit portability to POSIX systems, pipes >> are the general solution for what you're trying to do, but may not be >> the optimal solution. For instance, in the case of "ls", why not just >> call the functions in <dirent.h> yourself rather than opening a pipe to >> a program that calls them for you and then writing an enormous amount of >> code to parse its output to extract the same data? > > Because the "ls" command was an example. I really want to process the > output of things like "iostat", "/proc/loadavg", "sar" and "tcpdump". As I said, pipes are the general solution. The source for all of those should be available, so you'd have to figure out whether it'd be more optimal (for your specific needs) to crib the logic and API calls to get the data you need directly rather than using pipes and parsing the output. Maybe, maybe not. > dirent.h would be great if I needed to analyse information about > directories but since I don't need that functionality (and I have > already used it in the past) it is a rather pointless suggestion. Obviously, I could only respond to the specific example you gave. S -- Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws the K5SSS dice at every possible opportunity." --Stephen Hawking
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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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