C program to execute shell script

baigmd · #1 (**permalink**) 3 Weeks Ago

Hi,

Can anyone give me a sample code to execute shell script from C program.

Thanks

migurus · #2 (**permalink**) 3 Weeks Ago

man system
Example:
system("pwd");

pogdorica · #3 (**permalink**) 3 Weeks Ago

In "C program to execute Shell script with arguments "thread, you can see an C++ example.

fpmurphy · #4 (**permalink**) 3 Weeks Ago

This line of code is invalid

Code:

return system("/tmp/lab5.sh ", argv[count]);

The system() API takes one argument only. Man system for more information.

Hint - create a buffer using an array or malloc(). strcpy "/tmp/lab5.sh " to buffer. strcat argv[count] to the buffer. Use buffer as argument to system API.

baigmd · #5 (**permalink**) 3 Weeks Ago

Hi,

Can anyone help with the below code. I am trying to execute Shell script with arguments in C program but it is giving errors.

Code:

#include <stdlib.h>
#include <stdio.h>

int main (int argc, char *argv[])
{
 int count;
 for (count = 1; count < argc; count++)
 {
   return system("/tmp/lab5.sh ", argv[count]);
 }
 return 0;
}

pogdorica · #6 (**permalink**) 3 Weeks Ago

In C++, you can:

Code:

#include <stdlib.h>
#include <stdio.h>
#include <string>

int main (int argc, char *argv[])
{
 int count;
 std::string cadena = "";
 std::string orden;

 for (count = 1; count < argc; count++)
 {
   cadena.append (argv[count]);
 }
 orden = "/tmp/lab5.sh " + cadena;
 return system(orden.c_str());
}

If you need C language, only you must replace the "append" operation with concatenate (strcat or sprintf) variables C char *.

tsurko · #7 (**permalink**) 2 Weeks Ago

Quote:

Originally Posted by baigmd

Hi,

Can anyone help with the below code. I am trying to execute Shell script with arguments in C program but it is giving errors.

Code:

#include <stdlib.h>
#include <stdio.h>

int main (int argc, char *argv[])
{
 int count;
 for (count = 1; count < argc; count++)
 {
   return system("/tmp/lab5.sh ", argv[count]);
 }
 return 0;
}

One more thing - you call return system() in for(). return will terminate main() immediately so you won't have your script executed argc times. I'd suggest to save the return value of system in new variable and examine it if you need error checking.

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