#include <rudiments/file.h>
#include <rudiments/permissions.h>
#include <rudiments/stdio.h>
int main(int argc, const char **argv) {
// open the file
file f;
f.open("testfile",O_RDWR|O_CREAT,
permissions::evalPermString("rw-rw-rw-"));
// write 4 fixed length records to the file,
// each consiting of two 10-character fields
f.write(" ");
f.write(" ");
f.write(" ");
f.write(" ");
// go to the first record
f.setPositionRelativeToBeginning(0);
// overwrite the first record
f.write("goodbye friends ");
// go to the last record
f.setPositionRelativeToEnd(-20);
f.write("hello there ");
// go to the third record
f.setPositionRelativeToBeginning(40);
f.write("bye folks ");
// go to the second record
f.setPositionRelativeToCurrent(-40);
f.write("hi guys ");
// print the records in reverse order
char record[20];
for (off64_t i=1; i<=4; i++) {
f.setPositionRelativeToEnd(-20*i);
f.read(record,20);
stdoutput.write(record,20);
stdoutput.write('\n');
}
}