Copy files

[FredrikN]

Hi.
I'm new to C and I have a little problem.

I want to take an argv from the command line , (running Linux) and then take the argv and use it in an file movment.

The code looks like this

main (int argc, char *argv[])

file = (mv argv[1] -> newfile.txt)


The last line is the problem.
I don't know how to insert the argv[1]

Lets say I run the program

program 123.txt [enter]

the program vill now move file 123.txt to newfile.txt


Maybe someone know ?

Thanks

 

[programsecrets]

Use something like this, but make it more robust by specifying directory paths and handling potential command failures:

main(int argc, char *argv[])
{
  if (argc >= 2)
  {
    char sCommand[512];
    sprintf(sCommand, "mv %s, %s", argv[1], "newfile.txt");

    system(sCommand);
  }
}

 

[olded]

Fredrik:

If the mv fails, send stderr to /dev/null. Remove if you don't want it:

Regards,


Ed


include <stdio.h>

int main(int argc, char *argv[])
{
char buffer[80];

if(argc == 1)
{
printf(&quot;usage is program <file name>\n&quot;
exit (1);
}

sprintf(buffer, &quot;mv %s %s %s &quot;, argv[1], &quot; newfile.txt&quot;, &quot;2> /dev/null&quot;

if((system(buffer) != 0))
printf(&quot;mv failed!\n&quot;

}

 

[FredrikN]

Thanks both of you.
Works fine now

//Fredrik