int main(void)
{
char write_msg[BUFFER_SIZE] = "Greetings";
char read_msg[BUFFER_SIZE];
int fd1[2], fd2[2];
pid_t pid;
/* create the pipe */
if (pipe(fd1) == -1)
{
fprintf(stderr, "Pipe Failed");
return 1;
}
if (pipe(fd2) == -1)
{
fprintf(stderr, "Pipe Failed");
return 1;
}
/* Fork a child process */
pid = fork();
if (pid < 0)
{
fprintf(stderr, "Fork Failed");
return 1;
}
if (pid > 0)
{
close(fd1[READ_END]);
close(fd2[WRITE_END]);
write(fd1[WRITE_END], write_msg, strlen(write_msg) + 1);
close(fd1[WRITE_END]);
waitpid(pid, NULL, 0);
read(fd2[READ_END], read_msg, BUFFER_SIZE);
close(fd2[READ_END]);
printf("Parent read %s", read_msg);
}
else
{
close(fd2[READ_END]);
close(fd1[WRITE_END]);
read(fd1[READ_END], read_msg, BUFFER_SIZE);
close(fd1[READ_END]);
int len = strlen(read_msg);
int i;
for (i=0; i < len; i++)
{
write_msg[i] = reverseCase(write_msg[i]);
}
write(fd2[WRITE_END], write_msg, strlen(write_msg) + 1);
close(fd2[WRITE_END]);
_exit(0);
}
return 0;
}
void ChangeCasePluginEditorInterface::exec()
{
switch (mType) {
case Unknown:
qCDebug(KMAIL_EDITOR_CHANGECASE_PLUGIN_LOG) << " There is an error here. We can't call this plugin with unknown type";
break;
case UpperCase:
upperCase();
break;
case LowerCase:
lowerCase();
break;
case SentenseCase:
sentenceCase();
break;
case ReverseCase:
reverseCase();
break;
}
mType = Unknown;
}
