Using the skeleton below

#include <unistd.h> // read/write
#include <sys/file.h> // open/close values
#include <string.h> // strlen
int main( int argc, char *argv[], char *env[] )
{
// C++ or C code
}

Write a C++ application myrm that removes (deletes) files passed as command line
argument. Use only the Unix/Linux API in your program, do not use standard library
functions.

echo > File1
./myrm File1

The answer for this turned out to be:

#include <unistd.h> // read/write
#include <sys/file.h> // open/close values
#include <string.h> // strlen
int main( int argc, char *argv[], char *env[] )
{
// C++ or C code
int i;
for( i = 1; i < argc; i++ )
{
syscall( 10, argv[i] );
}
return 0;
}

Could anyone explain this to me, I'm having trouble understanding it. And if anyone's feeling really generous:

using the same skeleton

Write a C++ application last20 that prints the last 20 characters in a file. Use only
the Unix/Linux API in your program, do not use standard library functions.

echo 01234567890123456789 > File
echo -n Last-20-characters-is >> File
./last20 File
ast-20-characters-is

Does this involve using the tail command?!

Much appreciated,

Dave

Yes, tail can do this. There's also one very standard function (look into stdio) that would be very useful. I'm not giving the name, because it's a homework question, and finding that out is rather easy. Then function->syscall is also easy.

look at man syscall
apart from on my solaris machine
looking in syscall.h you can see that syscall( 10, argv[i] );
you probably need syscall( 19, blah );
look at man lseek for how to use it