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Post subject: [photon] - after fork , execv problem
 Posted: Nov 12, 2007 - 09:20 AM
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New Member
Joined: Nov 12, 2007
Posts: 3
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Sorry, I'm foor at speaking english.
Now, I'm making Serial Communication Program.
In this program, when I click button ," Receive File" , It fork and execute command ,"rz".
Code:
if ( fork() == 0)
{
if ( execv("/bin/rz","rz",NULL) < 0)
{
printf("err");
}
}
Ths code has no problem in console,
no error: fork, execv
Code:
$> gcc main.c
$> ./a.out
.... rz .... sz filename ... ready.....
but not in photon.
build done ,and it executed,
no error: fork, execv
after I clicked button , it forked and executed.
But forked( child ) proccess was killed at once.
when I put command (any gui program) in parameter of execv function and execute it , the gui program did work
only command ( any console program ) in parameter of execv function. it occured this problem ,
I don't know why it do that in photon.
Please, Let me know the reason, |
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Post subject: RE: [photon] - after fork , execv problem
Posted: Nov 12, 2007 - 12:50 PM
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Senior Member
Joined: Jul 22, 2004
Posts: 327
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Do you run this in a console in photon?
Try calling a shell with the parameter to start rz. |
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Post subject: RE: [photon] - after fork , execv problem
Posted: Nov 13, 2007 - 09:10 AM
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New Member
Joined: Nov 12, 2007
Posts: 3
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I called a shell with the parameter to start rz.
no problem
after I build my program In momentics and run it , when I click the button , it occurs problem.
Fork and excute is done , but child proccess is killed at once.
um.... |
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Post subject: RE: [photon] - after fork , execv problem
Posted: Nov 13, 2007 - 11:40 AM
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Senior Member
Joined: Oct 06, 2003
Posts: 147
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try "system" or :
execv("/bin/rz >> /dev/null","rz",NULL) |
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Post subject: RE: [photon] - after fork , execv problem
Posted: Nov 13, 2007 - 04:40 PM
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Senior Member
Joined: Jul 22, 2004
Posts: 327
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i actually thought of something like:
char* arg_list[] = { "/usr/photon/bin/pterm", "-z", "/usr/bin/rz" };
execv( "/usr/photon/bin/pterm", arg_list );
what actually should call:
pterm -z /usr/bin/rz
This opens an Photon Terminal Window where your output is directed to.
The version by qnxloader directs the output to /dev/null ;P |
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Post subject: Re: RE: [photon] - after fork , execv problem
Posted: Nov 14, 2007 - 01:19 AM
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New Member
Joined: Nov 12, 2007
Posts: 3
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=========================================
"micro" :
i actually thought of something like:
char* arg_list[] = { "/usr/photon/bin/pterm", "-z", "/usr/bin/rz" };
execv( "/usr/photon/bin/pterm", arg_list );
what actually should call:
pterm -z /usr/bin/rz
This opens an Photon Terminal Window where your output is directed to.
The version by qnxloader directs the output to /dev/null ;P
===========================================
Thank you,
I adjust this solution. it is no problem.
but I don't know how to adjust other solution. I can't do it.
as if I only do fork it, it work. it do not excute it, "rz" |
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