Very Computer

I am developing a webmail system on linux. I need to add a user into the
system by cgi(written in GNU C), of course, I executed useradd program
and passwd, the problem occurred when I tried to send the password to
passwd using a pipe.  my program goes like this

  pipe_out = popen ("passwd username", "w");
  fprintf (pipe_out, "password\npassword\n");
  pclose(pipe_out);

but passwd said "conversation error". anoy way it doesn't work.  So
anyone know how to handle this kind of problem? or in an alternative
way to work the task out.

thanks
nick

Sent via Deja.com http://www.deja.com/
Before you buy.

Barring any other means to set the password, you can use pseudo ttys and
have passwd use the slave side.

--
Josef M?llers
Fujitsu Siemens Computers
SHV Server DS 1

| I am developing a webmail system on linux. I need to add a user into the
| system by cgi(written in GNU C), of course, I executed useradd program
| and passwd, the problem occurred when I tried to send the password to
| passwd using a pipe.  my program goes like this
|
|   pipe_out = popen ("passwd username", "w");
|   fprintf (pipe_out, "password\npassword\n");
|   pclose(pipe_out);
|
| but passwd said "conversation error". anoy way it doesn't work.  So
| anyone know how to handle this kind of problem? or in an alternative
| way to work the task out.

  See the 'expect' program for this. You need to be using a pty, and
that's a simple way to get there from here. Part of tk, tcl, some
package I don't remember off the top of my head.

--

  "Doing interesting things with little computers since 1979"(tm)
It doesn't bother me that people make flavored yogurt with fruits. It doesn't
bother me that someone makes caramel broccoli yogurt. It doesn't even bother
me that people buy it to rub on each other's * bodies.
What DOES bother me is that people buy it to EAT!