dtrace discuss - Apr 2007 - about how to know syscall function have what arguments? and argument type ?

Hi! everybody here.
           How are you!
   
  In Solaris Dynamic Tracing Guide have follow sentence :
   
  For all syscall probes, the function name is set to be the name of the
instrumented system call.
   
  and 
  For entry probes, the arguments (arg0 .... argn) are the arguments to the
system call.
   
  When I read
  syscall::write:entry
  /pid == $1/
  {
     printf("%s(%d , 0x%x , %4d)" , probefunc , arg0 , arg1 , arg2);
  }
   
  My question is :
  where can I find out "write" system call  that have how many
arguments ?
  type of each argument.  in other words , I want to find source program of
"write"
  or source program of others system call function.
   
   
  Thanks, Sincerely
  --------------------------
  Betty
   

       
---------------------------------
????????-3.5G???20M??? 
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Hi,
> where can I find out "write" system call  that have how many
arguments ?
> type of each argument.  in other words , I want to find source program
> of "write"
> or source program of others system call function.
The description of the syscall are in section 2 of man pages so for
example to know about write(2) syscall and it''s arguments:

# man -s2 write

System Calls                                             write(2)

NAME
     write, pwrite, writev - write on a file

SYNOPSIS
     #include <unistd.h>

     ssize_t write(int fildes, const void *buf, size_t nbyte);
[...]

For the source code you can search (identifier) for write in:

http://cvs.opensolaris.org/source/

and then look for the function in
"/onnv/onnv-gate/usr/src/uts/common/syscall/" section.

Cheers,
Gonzalo.

Sun.betty wrote:
> Hi! everybody here.
>          How are you!
>  
> In Solaris Dynamic Tracing Guide have follow sentence :
>  
> For all syscall probes, the function name is set to be the name of the 
> instrumented system call.
>  
> and
> For entry probes, the arguments (arg0 .... argn) are the arguments to 
> the system call.
>  
> When I read
> syscall::write:entry
> /pid == $1/
> {
>    printf("%s(%d , 0x%x , %4d)" , probefunc , arg0 , arg1 ,
arg2);
> }
>  
> My question is :
> where can I find out "write" system call  that have how many
arguments ?
> type of each argument.  in other words , I want to find source program 
> of "write"
> or source program of others system call function.
>  
>  
> Thanks, Sincerely
> --------------------------
> Betty
>  
> 
> ------------------------------------------------------------------------
> ????????-3.5G???20M??? <http://cn.mail.yahoo.com>
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org

For the sourcecode take a look at http://src.opensolaris.org

For your arguments, the quickest place to look is just in the manpages,
followed by header files. A man -s2 write gives you all the details you
need for your question.

- F.

Sun.betty wrote:
> Hi! everybody here.
>          How are you!
>  
> In Solaris Dynamic Tracing Guide have follow sentence :
>  
> For all syscall probes, the function name is set to be the name of the 
> instrumented system call.
>  
> and
> For entry probes, the arguments (arg0 .... argn) are the arguments to 
> the system call.
>  
> When I read
> syscall::write:entry
> /pid == $1/
> {
>    printf("%s(%d , 0x%x , %4d)" , probefunc , arg0 , arg1 ,
arg2);
> }
>  
> My question is :
> where can I find out "write" system call  that have how many
arguments ?
> type of each argument.  in other words , I want to find source program 
> of "write"
> or source program of others system call function.
>  
>  
> Thanks, Sincerely
> --------------------------
> Betty
>  
> 
> ------------------------------------------------------------------------
> ????????-3.5G???20M??? <http://cn.mail.yahoo.com>
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org