#include <errno.h>

#include <errno.h>
#include <fcntl.h>
#include <newt.h>
#include <string.h>
#include <unistd.h>

#include "fs.h"
#include "install.h"
#include "kernel.h"
#include "log.h"
#include "windows.h"

static int copyFile(char * sourceName, char * destName) {
int source, dest, i;
char buf[16384];
int olderrno;

logMessage("coping %s to %s\n", sourceName, destName);

source = open(sourceName, O_RDONLY);
if (source < 0) {
logMessage("file %s missing from source directory",
sourceName);
messageWindow("Error", "file %s missing from source directory",
sourceName);
return INST_ERROR;
}

dest = creat(destName, 0644);
if (dest < 0) {
logMessage("failed to create file %s", destName);
messageWindow("Error", "failed to create file %s", destName);
close(source);
return INST_ERROR;
}

while ((i = read(source, buf, sizeof(buf))) > 0) {
if (write(dest, buf, i) != i) {
olderrno = errno;

logMessage("error writing to file %s: %s",
destName, strerror(olderrno));
messageWindow("Error", "error writing to file %s: %s",
destName, strerror(olderrno));

close(source);
close(dest);
unlink(destName);
return 1;
}
}

if (i < 0) {
olderrno = errno;

logMessage("error reading from file %s: %s", sourceName,
strerror(olderrno));
messageWindow("Error", "error reading from file %s: %s", sourceName,
strerror(olderrno));
}

close(source);
close(dest);

if (i < 0)
return 1;

return 0;
}

int kernelCopy(char * filename) {
int rc = 0;

if (!filename) {
messageWindow("Kernel", "Please insert your boot disk in your first "
"disk drive if it's not already present.");
if (doMount("fd0", "/tmp/bootdisk", "ext2", 1, 0))
return INST_ERROR;

winStatus(34, 3, "Kernel", "Copying kernel from floppy...");
rc = copyFile("/tmp/bootdisk/vmlinux.gz", "/mnt/vmlinux.gz");
sync();
newtPopWindow();
} else {
winStatus(34, 3, "Kernel", "Copying kernel from floppy...");
rc = copyFile(filename, "/mnt/vmlinux.gz");
sync();
newtPopWindow();
}

return rc;
}