system command in C++ with arguments

saikoushal · #1 (**permalink**) 04-05-04, 07:08

hi
i am trying to run a shell script by calling it in a C++ program.
I am using system command to do so.
the shell script i am using needs two argument.
in the C++ the two arguments are return values from two functions
say arg1 arg2 (arg1 = 2000 , arg2 = 10)
i am using the system command as follows

system("sh ./shellscript arg1 arg2");

but the shell script is not taking the value of arg1(i.e. 2000) instead its taking "arg1" as argument and giving improper result.
Please guide me.
regards
sai koushal

Pat Phelan · #2 (**permalink**) 04-05-04, 12:12

If you mean that arg1 and arg2 are two variables inside your C++ program, then you need to format them into the command string that you pass to the system function. Keep in mind that this is a very crude example, just to get you started thinking, but:

Code:

char buffer[200];
int arg1, arg2;
arg1 = 2000;
arg2 = 10;
sprintf(buffer, "sh ./shellscript %i %i", arg1, arg2);
system(buffer);

I think this will get you started, but if not feel free to post again.

-PatP

saikoushal · #3 (**permalink**) 04-05-04, 21:54

Quote:

Originally posted by Pat Phelan
If you mean that arg1 and arg2 are two variables inside your C++ program, then you need to format them into the command string that you pass to the system function. Keep in mind that this is a very crude example, just to get you started thinking, but:

Code:

char buffer[200];
int arg1, arg2;
arg1 = 2000;
arg2 = 10;
sprintf(buffer, "sh ./shellscript %i %i", arg1, arg2);
system(buffer);

I think this will get you started, but if not feel free to post again.

-PatP

Thanks a lot....its working great

saikoushal · #4 (**permalink**) 04-06-04, 01:07

Quote:

Originally posted by Pat Phelan
If you mean that arg1 and arg2 are two variables inside your C++ program, then you need to format them into the command string that you pass to the system function. Keep in mind that this is a very crude example, just to get you started thinking, but:

Code:

char buffer[200];
int arg1, arg2;
arg1 = 2000;
arg2 = 10;
sprintf(buffer, "sh ./shellscript %i %i", arg1, arg2);
system(buffer);

I think this will get you started, but if not feel free to post again.

-PatP

Thanks a lot....its working great

saikoushal · #5 (**permalink**) 04-06-04, 03:55

Quote:

Originally posted by Pat Phelan
If you mean that arg1 and arg2 are two variables inside your C++ program, then you need to format them into the command string that you pass to the system function. Keep in mind that this is a very crude example, just to get you started thinking, but:

Code:

char buffer[200];
int arg1, arg2;
arg1 = 2000;
arg2 = 10;
sprintf(buffer, "sh ./shellscript %i %i", arg1, arg2);
system(buffer);

I think this will get you started, but if not feel free to post again.

-PatP

Thanks a lot....its working great

Pat Phelan · #6 (**permalink**) 04-06-04, 07:35

It is great that that is working for you. Let us know if you have any problems with it.

-PatP

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