how to call system command with variable parameters?

[shaggystyle]

I'm looking for a way to call system commands with variable parameters
within a Unix environment. Sort of like system() but i need to be
able to pass variable parameters....so I guess it would kind of look
like this:

system("command -%s -%s", parameter1, parameter2);

I've tried the above and it doesn't work when compiled with GCC.
Thanks.

 

[lallous]

I'm looking for a way to call system commands with variable parameters
within a Unix environment. Sort of like system() but i need to be
able to pass variable parameters....so I guess it would kind of look
like this:

system("command -%s -%s", parameter1, parameter2);

I've tried the above and it doesn't work when compiled with GCC.
Thanks.

Hello

Use sprintf()

char temp[512];
sprintf(temp, "command -%s -%s", parameter1, parameter2);
system((char *)temp);

However this was not a C++ question.

 

[David Harmon]

Use sprintf()

char temp[512];
sprintf(temp, "command -%s -%s", parameter1, parameter2);
system((char *)temp);

However this was not a C++ question.

std:stringstream cmd;
cmd << "command -" << parameter1 << " -" << parameter2;
system(cmd.str().c_str());

There, now it was a C++ question.

 

[Clark Cox]

I'm looking for a way to call system commands with variable parameters
within a Unix environment. Sort of like system() but i need to be
able to pass variable parameters....so I guess it would kind of look
like this:

system("command -%s -%s", parameter1, parameter2);

I've tried the above and it doesn't work when compiled with GCC.
Thanks.

Hello

Use sprintf()

char temp[512];

What if the command plus it's parameters is longer than 511 characters?
Use ostringstream instead.

sprintf(temp, "command -%s -%s", parameter1, parameter2);
system((char *)temp);

This cast is completely redundant.

 

[lallous]

Use sprintf()

char temp[512];
sprintf(temp, "command -%s -%s", parameter1, parameter2);
system((char *)temp);

However this was not a C++ question.

std:stringstream cmd;
cmd << "command -" << parameter1 << " -" << parameter2;
system(cmd.str().c_str());

There, now it was a C++ question.

Thanks for the tip!