Filebuffer sizeofchar bytesremain else bytesread

fileBuffer,
(sizeof(char)
* bytesRemain));
} else
{
bytesRead =
read(socketID,
fileBuffer,
(sizeof(char)
*
NET_BUF_SIZE));
}
write(openFile, fileBuffer,
bytesRead);
bytesRemain = bytesRemain -
bytesRead;
}
} else if (tempChar == '1') // File not found
{
printf("File not found\n");
} else if (tempChar == '2') // Denied access
{
printf("Access denied\n");
} else if (tempChar == '3') // Other error
{
printf("Could not get file\n");
} else
{
//Shouldn't get here
printf("Something went wrong...\n");
}
// Close the opened file
close(openFile);
} else if (strcmp("put", tempToken) == 0)
{
22

// put command stuff here
// Set opcode in tempChar
tempChar = 'D';
// Get the filename
tempToken = strtok(NULL, TOK_DELIM_NS);
if(tempToken == NULL)
{
printf("No file name specified\n");
continue;
}
int2bytes = strlen(tempToken) + 1;
int2bytes = htons(int2bytes);
// Open file for sending
openFile = open(tempToken, O_RDONLY);
if (openFile == -1)
{
if (errno == ENOENT)
{
printf("Could not find file "
"to send\n");
} else if (errno == EACCES)
{
printf("Permission denied\n");
} else
{
printf("Could not open file "
"to send\n");
}
continue;
}
// Send opcode
write(socketID, &tempChar, sizeof(tempChar));
// Send filename length
write(socketID, &int2bytes, sizeof(int2bytes));
// Send filename
write(socketID, tempToken,
(sizeof(char) * ntohs(int2bytes)));
// Get back opcode
read(socketID, &tempChar, sizeof(tempChar));
// Get back status code
read(socketID, &tempChar, sizeof(tempChar));
if (tempChar == '0') // Can send file
{
// Set next opcode and send
tempChar = 'E';
write(socketID, &tempChar,
sizeof(tempChar));
// Get file info
stat(tempToken, &fileInfo);
int4bytes = fileInfo.st_size;
// Send file size
int4bytes = htonl(int4bytes);
23

write(socketID, &int4bytes,
sizeof(int4bytes));
int4bytes = ntohl(int4bytes);
bytesRemain = int4bytes;
// Loop through and send file
while (bytesRemain)
{
if (bytesRemain < NET_BUF_SIZE)
{
bytesRead =
read(openFile,
fileBuffer,
(sizeof(char)
*
bytesRemain));
} else
{
bytesRead =
read(openFile,
fileBuffer,
(sizeof(char)
*
NET_BUF_SIZE));
}
write(socketID, fileBuffer,
bytesRead);
bytesRemain = bytesRemain -
bytesRead;
}
// Close the open file
close(openFile);
} else if (tempChar == '1') // Filename clash
{
printf("A file of that name already "
"exists on the server\n");
} else if (tempChar == '2') // Create error
{
printf("Server could not create file "
"for saving\n");
} else if (tempChar == '3') // Other error
{
printf("The server incountered an "
"unspecified error\n");
} else // Just in case
{
printf("Something went wrong...\n");
}
} else if (strcmp("pwd", tempToken) == 0)
{
// pwd command stuff here
// Set opcode in tempChar
tempChar = 'E';
24

// Send opcode
write(socketID, &tempChar, sizeof(tempChar));
// Get back opcode response
read(socketID, &tempChar, sizeof(tempChar));
// Get back length of pwd
read(socketID, &int2bytes, sizeof(int2bytes));
// Get pwd
read(socketID, tempString,
(sizeof(char) * ntohs(int2bytes)));
// Print out pwd
printf("%s\n", tempString);
} else if (strcmp("lcd", tempToken) == 0)
{
// lcd command stuff here
tempToken = strtok(NULL, TOK_DELIM);
check = chdir(tempToken);
if (check == -1) // If dir change fails
{
if (errno == ENOENT)
{
printf("Directory does not "
"exist\n");
} else if (errno == EACCES)
{
printf("Permission denied\n");
} else
{
printf("Unspecified error. "
"Directory not "
"changed\n");
}
}
} else if (strcmp("ldir", tempToken) == 0)
{
// ldir stuff here
numFiles = scandir(".", &fileList,
NULL, alphasort);
if (numFiles == 0)
{
perror("myftp:scandir");
} else
{
for (i = 0; i < numFiles; ++i)
{
if (fileList[i]->d_type
== DT_REG)
{
printf("f ");
} else if (fileList[i]->d_type
== DT_DIR)
{
printf("d ");
25