Date: Tue, 10 Dec 2013 19:32:45 -0500 From: Mark Johnston <markj@freebsd.org> To: hiren panchasara <hiren.panchasara@gmail.com> Cc: freebsd-dtrace@freebsd.org Subject: Re: Examples from www.dtracebook.com Message-ID: <20131211003245.GA4080@raichu> In-Reply-To: <CALCpEUE7%2BPY9tCdc3R-cXfeXCy%2BRYmz9aNTKcbwat3tgvniORQ@mail.gmail.com> References: <CALCpEUFnwN%2BmwTDyq-_q3x8jkk8EBfzMMyRzVeHDrHq=j-nqVg@mail.gmail.com> <20131210234714.GQ1681@albert.catwhisker.org> <CALCpEUGms0S%2BQue%2B6TmAZmRW4t8LZh02r-q%2Bvf1WupDkwcpH-Q@mail.gmail.com> <CALCpEUE7%2BPY9tCdc3R-cXfeXCy%2BRYmz9aNTKcbwat3tgvniORQ@mail.gmail.com>
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On Tue, Dec 10, 2013 at 04:26:54PM -0800, hiren panchasara wrote:
> $ sudo dtrace -n 'proc:::exec-success { trace(curpsinfo->pr_psargs); }'
> dtrace: description 'proc:::exec-success ' matched 1 probe
> CPU ID FUNCTION:NAME
> 5 48876 :exec-success /bin/sh /usr/bin/man ls
> 2 48876 :exec-success /sbin/sysctl -n hw.machine_arch
> 6 48876 :exec-success /sbin/sysctl -n hw.machine
> 0 48876 :exec-success /usr/bin/locale
> 7 48876 :exec-success /usr/bin/zcat
> /usr/share/man/man1/ls.1.gz
> 2 48876 :exec-success head -1
> 1 48876 :exec-success tbl
> 6 48876 :exec-success groff -S -P-h -Wall
> -mtty-char -man -Tascii -P-c
> 7 48876 :exec-success /usr/bin/zcat
> /usr/share/man/man1/ls.1.gz
> 3 48876 :exec-success less
> 3 48876 :exec-success troff -Wall -mtty-char
> -man -Tascii
> 7 48876 :exec-success grotty -h -c
>
>
> 6 48876 :exec-success top
> 7 48876 :exec-success ps awwux
> 7 48876 :exec-success iostat
> 5 48876 :exec-success vmstat 1
> 4 48876 :exec-success bash
> 4 48876 :exec-success whois
> 5 48876 :exec-success whoami
> 4 48876 :exec-success devinfo
> 4 48876 :exec-success dmesg
> 6 48876 :exec-success pciconf -lv
>
> I am getting interesting info only when "man" is executed and not for
> any other command. What does that tell me? How is man special? Other
> programs must also be doing exec(2), no?
/usr/bin/man is a shell script. You'll see similar output for any
executable that starts with a shebang.
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