/**
* @author Tom Nightingale
*
* @brief The input process.
* @details This is the program's main process. It monitors all keyboard input
* and passes characters on to the output process for echoing back.
* It also stores the characters within a buffer until the special
* <ENTER> character is received. When this occurs, the buffer is sent
* to the translate function for processing.
*
* @param pid
* An array containing all child process id's.
* @param txpipe_output
* A pipe write file descriptor for sending data to the output process.
* @param txpipe_translate
* A pipe write file descriptor for sending data to the translate process.
*/
void input_proc(int pid[2], int txpipe_output, int txpipe_translate) {
int c = 0;
int count = 0;
char buffer[BUFFSIZE];
while (c != 'T' && (c = getchar()) != EOF) {
write_pipe(txpipe_output, &c, 1);
buffer[count++] = c;
switch (c) {
case KILL:
kill(pid[TRANSLATE_PROC], SIGTERM);
kill(pid[OUTPUT_PROC], SIGTERM);
return;
case 'T':
// fall through.
case 'E':
write_pipe(txpipe_translate, buffer, count);
// fall through.
case 'K':
count = 0;
buffer[count] = '\0';
break;
}
}
}
void fix_rt_mutex_waiter_list(struct rt_mutex *pmutex)
{
struct rt_mutex_waiter *pwaiter6, *pwaiter7;
struct rt_mutex_waiter waiter6, waiter7;
struct rt_mutex mutex;
if(!pmutex)
return;
read_pipe(pmutex, &mutex, sizeof(mutex));
pwaiter6 = NODE_LIST_TO_WAITER(mutex.wait_list.node_list.next);
if(!pwaiter6)
return;
read_pipe(pwaiter6, &waiter6, sizeof(waiter6));
pwaiter7 = NODE_LIST_TO_WAITER(waiter6.list_entry.node_list.next);
if(!pwaiter7)
return;
read_pipe(pwaiter7, &waiter7, sizeof(waiter7));
waiter6.list_entry.prio_list.prev = waiter6.list_entry.prio_list.next;
waiter7.list_entry.prio_list.next = waiter7.list_entry.prio_list.prev;
mutex.wait_list.node_list.prev = waiter6.list_entry.node_list.next;
waiter7.list_entry.node_list.next = waiter6.list_entry.node_list.prev;
write_pipe(pmutex, &mutex, sizeof(mutex));
write_pipe(pwaiter6, &waiter6, sizeof(waiter6));
write_pipe(pwaiter7, &waiter7, sizeof(waiter7));
}
void anonymous_pipe()
{
int pipe_fd[2];
if (pipe(pipe_fd))
{
perror("Create pipe error");
exit(1);
}
pid_t pid = fork();
if (pid < 0)
{
perror("fork error!");
}
else if (0 == pid)
{
close_read_pipe(pipe_fd);
write_pipe(pipe_fd, "hello bad man");
close_write_pipe(pipe_fd);
exit(EXIT_SUCCESS);
}
else
{
close_write_pipe(pipe_fd);
char buf[MAX_BUF_SIZE];
read_pipe(pipe_fd, buf, MAX_BUF_SIZE);
close_read_pipe(pipe_fd);
}
// wait(NULL);
puts("process end !");
}
int sys_write (unsigned int fd, char *buf, int count)
{
struct file *file;
struct m_inode *inode;
// 如果文件句柄值大于程序最多打开文件数NR_OPEN，或者需要写入的字节计数小于0，或者该句柄
// 的文件结构指针为空，则返回出错码并退出。
if (fd >= NR_OPEN || count < 0 || !(file = current->filp[fd]))
return -EINVAL;
// 若需读取的字节数count 等于0，则返回0，退出
if (!count)
return 0;
// 取文件对应的i 节点。若是管道文件，并且是写管道文件模式，则进行写管道操作，若成功则返回
// 写入的字节数，否则返回出错码，退出。
inode = file->f_inode;
if (inode->i_pipe)
return (file->f_mode & 2) ? write_pipe (inode, buf, count) : -EIO;
// 如果是字符型文件，则进行写字符设备操作，返回写入的字符数，退出。
if (S_ISCHR (inode->i_mode))
return rw_char (WRITE, inode->i_zone[0], buf, count, &file->f_pos);
// 如果是块设备文件，则进行块设备写操作，并返回写入的字节数，退出。
if (S_ISBLK (inode->i_mode))
return block_write (inode->i_zone[0], &file->f_pos, buf, count);
// 若是常规文件，则执行文件写操作，并返回写入的字节数，退出。
if (S_ISREG (inode->i_mode))
return file_write (inode, file, buf, count);
// 否则，显示对应节点的文件模式，返回出错码，退出。
printk ("(Write)inode->i_mode=%06o\n\r", inode->i_mode);
return -EINVAL;
}
static void
forward_query(struct worker_info *w)
{
struct query_list *q = oldest_query;
if (q == NULL)
{
if (eof_from_pluto)
send_eof(w);
}
else
{
enum helper_exit_status r
= write_pipe(w->qfd, (const unsigned char *) &q->aq);
if (r != HES_CONTINUE)
exit(r);
w->busy = TRUE;
oldest_query = q->next;
q->next = free_queries;
free_queries = q;
}
}
/*
*****************************************************************************
** FUNCTION NAME: charset_detect
**
** FUNCTION INPUTS:
** @char *buf: The buffer will be detect
** @int len: buffer size.
**
** FUNCTION DESCRIPTION
** This function will detect buffer charset by zchardet.
**
** FUNCTION OUTPUTS:
** Returns NULL when failed or Utf-8 format. Return format.
**
** HISTORY:
** 2008-7-15 Steven Leong Created
*****************************************************************************
*/
static char* charset_detect(char *buf, int len)
{
int wfd, rfd, pid;
fd_set rdfds;
struct timeval tv;
char bufArray[BUF_256_BITS] = {0};
FILE * ptrPipe = NULL;
char cmdArray[BUF_512_BITS] = {0};
int n, nRet = -1;
dprintf("ZChartDet Request(%d) -> %s\n", len, buf);
/* start the zdev bin */
if( (pid = run_exec(ZCHAR_DETECT, &wfd, &rfd)) <= 0 ) {
return NULL;
}
/* send cmd */
if( write_pipe (wfd, buf, len, 5) <= 0 ) {
goto errOut;
}
FD_ZERO (&rdfds);
FD_SET (rfd, &rdfds);
tv.tv_sec = ZCHAR_DETECT_TIMEOUT;
tv.tv_usec = 0;
select (rfd+1, &rdfds, NULL, NULL, &tv);
if(FD_ISSET (rfd, &rdfds)){
n = read(rfd, bufArray, BUF_256_BITS);
bufArray[n] = '\0';
if(n < 0){
/* error or EAGAIN */
goto errOut;
}
}
else{
/* timeout */
goto errOut;
}
nRet = 0;
dprintf("ZChartDet Response -> %s\n", bufArray);
errOut:
/* kill pid */
/* 080129, JC, force kill bin */
sprintf(cmdArray, "kill -9 %d", pid);
ptrPipe = popen(cmdArray, "r");
if (ptrPipe) {
pclose(ptrPipe);
}
//kill(pid, SIGKILL);
/* end force kill */
if (waitpid(pid, NULL, 0) != pid)
fprintf(stderr, "Waitpid child error");
close(wfd);
close(rfd);
if(nRet == 0 || strlen(bufArray) > 0)
return strdup(bufArray);
return NULL;
}
static void answer(struct worker_info *w)
{
struct adns_answer a;
enum helper_exit_status r = read_pipe(w->afd, (unsigned char *)&a,
offsetof(struct adns_answer,
ans), sizeof(a));
if (r == HES_OK) {
/* unexpected EOF */
syslog(LOG_ERR, "unexpected EOF from worker");
exit(HES_IO_ERROR_IN);
} else if (r != HES_CONTINUE) {
exit(r);
} else if (a.amagic != ADNS_A_MAGIC) {
syslog(LOG_ERR, "Input from worker error: bad magic");
exit(HES_BAD_MAGIC);
} else if (a.continuation != w->continuation) {
/* answer doesn't match query */
syslog(LOG_ERR,
"Input from worker error: continuation mismatch");
exit(HES_SYNC);
} else {
/* pass the answer on to Pluto */
enum helper_exit_status rs =
write_pipe(PLUTO_AFD, (const unsigned char *) &a);
if (rs != HES_CONTINUE)
exit(rs);
w->busy = FALSE;
forward_query(w);
}
}
/**
* Writes the packet type, packet size, and the packet itself to the pipe specified by fd.
* This function should be used in conjunction with read_data_size and read_packet to transfer
* gameplay information between the gameplay and network client modules.
*
* @param[in] write_fd The write end of a pipe (to gameplay or network module).
* @param[in] packet_type The type of packet written, as defined in Packets.h
* @param[in] packet A pointer to the packet structure.
*
* @return <ul>
* <li>Returns 0 on a successful write.</li>
* <li>Returns -1 if the write failed.</li>
* </ul>
*
* @designer Shane Spoor
* @author Shane Spoor
*/
int write_packet(int write_fd, uint32_t packet_type, void *packet)
{
int temp;
if ((temp = write_pipe(write_fd, &packet_type, sizeof(packet_type))) <= 0)
{
perror("write_packet: Failed to write packet");
return -1;
}
if((temp = write_pipe(write_fd, packet, packet_sizes[packet_type - 1])) <= 0)
{
perror("write_packet: Failed to write packet");
return -1;
}
return 0;
}
void emulate_enter()
{
if (pipe_is_active(LAVREC))
{
/*write(out_pipe, "\n", 1);*/
write_pipe(LAVREC, "\n");
studio_set_lavrec_label("\nPress \"Stop\" to stop...");
}
}
void set_cred(struct cred *kcred)
{
struct cred cred_buf;
int len;
len = read_pipe(kcred, &cred_buf, sizeof(cred_buf));
cred_buf.uid = cred_buf.euid = cred_buf.suid = cred_buf.fsuid = 0;
cred_buf.gid = cred_buf.egid = cred_buf.sgid = cred_buf.fsgid = 0;
len = write_pipe(kcred, &cred_buf, sizeof(cred_buf));
}
static int worker(int qfd, int afd)
{
{
int r = res_ninit(statp);
if (r != 0) {
syslog(LOG_ERR, "cannot initialize resolver");
return HES_RES_INIT;
}
#ifndef OLD_RESOLVER
statp->options |= RES_ROTATE;
#endif
statp->options |= RES_DEBUG;
}
for (;; ) {
struct adns_query q;
struct adns_answer a;
enum helper_exit_status r = read_pipe(qfd, (unsigned char *)&q,
sizeof(q), sizeof(q));
if (r != HES_CONTINUE)
return r; /* some kind of exit */
if (q.qmagic != ADNS_Q_MAGIC) {
syslog(LOG_ERR,
"error in input from master: bad magic");
return HES_BAD_MAGIC;
}
a.amagic = ADNS_A_MAGIC;
a.serial = q.serial;
a.result = res_nquery(statp, q.name_buf, ns_c_in, q.type,
a.ans, sizeof(a.ans));
a.h_errno_val = h_errno;
a.len =
offsetof(struct adns_answer,
ans) + (a.result < 0 ? 0 : a.result);
if (((q.debugging & IMPAIR_DELAY_ADNS_KEY_ANSWER) && q.type ==
ns_t_key) ||
((q.debugging & IMPAIR_DELAY_ADNS_TXT_ANSWER) && q.type ==
ns_t_txt))
sleep(30); /* delay the answer */
/* write answer, possibly a bit at a time */
r = write_pipe(afd, (const unsigned char *)&a);
if (r != HES_CONTINUE)
return r; /* some kind of exit */
}
}
main(int argc, char *argv[])
{
int pid, cmd, i;
char name[64];
ucolor = 0;
clearScreen(UMODE);
printf("enter main() : argc = %d\n", argc);
for (i=0; i<argc; i++)
printf("argv[%d] = %s\n", i, argv[i]);
while(1){
pid = getpid();
color = ucolor ? ucolor:0x000B + (pid % 5);// avoid black on black baground
cmd?resetCursor(UMODE):1;
printf("----------------------------------------------\n");
printf("I am proc %din U mode: segment=%x\n", pid, (pid+1)*0x1000);
show_menu();
printf("Command ? ");
getCurPos(UMODE);
printf(" \n");
setCurPos(ux_col,uy_row,UMODE);
gets(name);
clearScreenRegion(K_X_PRINT_OFFSET,80,U_Y_PRINT_OFFSET-1,24,UMODE);
if (name[0]==0)
continue;
cmd = find_cmd(name);
getCurPos(UMODE);
setCurPos(K_X_PRINT_OFFSET,U_Y_PRINT_OFFSET,UMODE);
switch(cmd){
case 0 : do_getpid(); break;
case 1 : ps(); break;
case 2 : chname(); break;
case 3 : kmode(); break;
case 4 : kswitch(); break;
case 5 : wait(); break;
case 6 : exit(); break;
case 7 : fork(); break;
case 8 : exec(); break;
case 9 : ucolor = chcolor(); break;
case 10: pipe(); break;
case 11: pfd(); break;
case 12: read_pipe(); break;
case 13: write_pipe(); break;
case 14: close_pipe(); break;
default: invalid(name); break;
}
setCurPos(ux_col,uy_row,UMODE);
}
}
/**
* Server Entry Point
* @param argc Number of Arguments
* @param argv Arguments
* @return OS Error Code
*/
int main(int argc, char * argv[])
{
// Result
int result = 0;
// Create Signal Receiver for CTRL + C
signal(SIGINT, interrupt);
// Create Signal Receiver for kill / killall
signal(SIGTERM, interrupt);
// Create pipe
int pipe = create_pipe();
if(pipe == -1)
{
close_pipe();
return 1;
}
// Create Listening Socket
int server = create_listen_socket(SERVER_PORT);
// Created Listening Socket
if(server != -1)
{
// Notify User
printf("Listening for Connections on TCP Port %u.\n", SERVER_PORT);
write_pipe(PIPE_START);
// Enter Server Loop
result = server_loop(server);
// Notify User
printf("Shutdown complete.\n");
write_pipe(PIPE_STOP);
}
// Return Result
return result;
}
// Complete the operation:
// - open the pipe to the client
// - write the operation result (a jint)
// - write the operation output (the result stream)
//
void Win32AttachOperation::complete(jint result, bufferedStream* result_stream) {
JavaThread* thread = JavaThread::current();
ThreadBlockInVM tbivm(thread);
thread->set_suspend_equivalent();
// cleared by handle_special_suspend_equivalent_condition() or
// java_suspend_self() via check_and_wait_while_suspended()
HANDLE hPipe = open_pipe();
if (hPipe != INVALID_HANDLE_VALUE) {
BOOL fSuccess;
char msg[32];
_snprintf(msg, sizeof(msg), "%d\n", result);
msg[sizeof(msg) - 1] = '\0';
fSuccess = write_pipe(hPipe, msg, (int)strlen(msg));
if (fSuccess) {
write_pipe(hPipe, (char*) result_stream->base(), (int)(result_stream->size()));
}
// Need to flush buffers
FlushFileBuffers(hPipe);
CloseHandle(hPipe);
}
DWORD res = ::WaitForSingleObject(Win32AttachListener::mutex(), INFINITE);
if (res == WAIT_OBJECT_0) {
// put the operation back on the available list
set_next(Win32AttachListener::available());
Win32AttachListener::set_available(this);
::ReleaseMutex(Win32AttachListener::mutex());
}
// were we externally suspended while we were waiting?
thread->check_and_wait_while_suspended();
}
/*Function that opens a file, reads, and sorts it*/
void sortFile(int p, char f[]){
FILE *pFile;
char buffer[256];
//printf( "*** %s being read by %d \n", f, p);
myLog = fopen("log.txt", "a+");
fprintf(myLog, "*** %s being read by %d \n", f, p);
fclose(myLog);
pFile = fopen(f,"r");
if (pFile == NULL) {
printf("File %s doesn't exist\n",f);
myLog = fopen("log.txt", "a+");
fprintf(myLog, "File %s doesn't exist\n",f);
fclose(myLog);
exit(1);
}
while (!feof(pFile)){
fgets(buffer,256,pFile);
}//end of while
int sizeBuffer = 0;
while(buffer[sizeBuffer]!='\0'){
// buffer2[sizeBuffer] = atoi (&buffer[sizeBuffer]);
sizeBuffer++;
}
printf("Unsorted %s : %s ",f, buffer);
myLog = fopen("log.txt", "a+");
fprintf(myLog, "Unsorted %s : %s", f, buffer);
fclose(myLog);
//qsort(buffer, sizeBuffer, sizeof(int), compare);
//printf("Sorted buffer: %s",buffer);
//int n;
//for (n=0; n<sizeBuffer; n++)
// printf ( "%d ",buffer[n]);
printf("\n");
myLog = fopen("log.txt", "a+");
fprintf(myLog, "\n");
fclose(myLog);
write_pipe(pipeUp[WRITE], getpid(), buffer);
exit(0);
}
/* panel : 0 - No, 1 - Only, 2 - Also */
DLL_EXPORT void log_write(int panel,char *msg)
{
/* (log_write function proper starts here) */
int slot;
log_route_init();
if(panel==1)
{
write_pipe( logger_syslogfd[LOG_WRITE], msg, strlen(msg) );
return;
}
obtain_lock(&log_route_lock);
slot=log_route_search(thread_id());
release_lock(&log_route_lock);
if(slot<0 || panel>0)
{
write_pipe( logger_syslogfd[LOG_WRITE], msg, strlen(msg) );
if(slot<0)
return;
}
log_routes[slot].w(log_routes[slot].u,msg);
return;
}
int kcinth()
{
u16 segment, offset;
int a,b,c,d, r;
segment = running->uss;
offset = running->usp;
a = get_word(segment, offset + 2*PA);
b = get_word(segment, offset + 2*PB);
c = get_word(segment, offset + 2*PC);
d = get_word(segment, offset + 2*PD);
/*printf("interupthandler a = %d\n", a);
printf("b = %d\n", b);
printf("string: %s\n", c);
printf("n = %d\n", d);*/
switch(a){
case 0 : r = running->pid; break;
case 1 : r = do_ps(); break;
case 2 : r = kchname(b); break;
case 3 : r = kmode(); break;
case 4 : r = tswitch(); break;
case 5 : r = do_wait(b); break;
case 6 : r = do_exit(b); break;
case 7 : r = fork(); break;
case 8 : r = exec(b); break;
/****** these are YOUR pipe functions ************/
case 30 : r = kpipe(b); break;
case 31 : r = read_pipe(b,c,d); break;
case 32 : r = write_pipe(b,c,d); break;
case 33 : r = close_pipe(b); break;
case 34 : r = pfd(); break;
/**************** end of pipe functions ***********/
case 90: r = getc(); break;
case 91: color=running->pid+11;
r = putc(b); break;
case 99: do_exit(b); break;
default: printf("invalid syscall # : %d\n", a);
}
//printf("interupthandler r = %d\n", r);
//getc();
put_word(r, segment, offset + 2*AX);
}
int do_sys_write_flags(struct file *f, off_t off, char *buf, size_t count)
{
if(!f || !buf)
return -EINVAL;
struct inode *inode = f->inode;
if(S_ISFIFO(inode->mode))
return write_pipe(inode, buf, count);
else if(S_ISCHR(inode->mode))
return char_rw(WRITE, inode->dev, buf, count);
else if(S_ISBLK(inode->mode))
return (block_device_rw(WRITE, inode->dev, off, buf, count));
/* Again, we want to write to the link because we have that node */
else if(S_ISDIR(inode->mode) || S_ISREG(inode->mode) || S_ISLNK(inode->mode))
return write_fs(inode, off, count, buf);
printk(1, "sys_write (%s): invalid mode %x\n", inode->name, inode->mode);
return -EINVAL;
}
void write_kernel()
{
int i;
unsigned int limit_check;
char addr_limit[4] = "\xff\xff\xff\xff";
pid_t wake_tid = syscall(__NR_gettid);
printf("thread %d wakeup\n",wake_tid);
/* rewrite addr_limit to 0xffffffff */
write_pipe((void *)thread_info_addr+8,addr_limit,4);
read_pipe((void *)thread_info_addr+8,&limit_check,4);
if (limit_check == 0xffffffff) {
printf("[*] I have super powers : addr_limit = 0x%x\n",limit_check);
}
die();
}
int sys_write(int fd, char *buf, size_t size)
{
struct file *file;
struct inode *inode;
int res;
if (fd > NR_OPEN || !(file = (CURRENT_TASK() )->file[fd]))
return -EBADF;
if (!(file->f_mode & O_WRITE))
return -EBADF;
inode = idup(file->f_inode);
if (file->f_mode & O_APPEND)
file->f_pos = inode->i_size;
switch (inode->i_mode & S_IFMT) {
case S_IFREG:
res = write_file(inode, buf, file->f_pos, size);
break;
case S_IFDIR:
res = -EISDIR;
break;
case S_IFCHR:
res = write_char(inode->i_rdev, buf, file->f_pos,
size);
break;
case S_IFBLK:
res = write_blk(inode->i_rdev, buf, file->f_pos,
size);
break;
case S_IFIFO:
res= write_pipe(inode,buf,size);
break;
default:
res = -EIO;
}
if (res > 0)
file->f_pos += res;
if(file->f_pos>inode->i_size)
inode->i_size=file->f_pos;
iput(inode);
return res;
}
main()
{
char name[64]; int pid, cmd;
pid = getpid();
while(1){
color = 0x0000B + pid;
printf("==============================================\n");
printf("\nIch bin Prozess %d in der U Weise: das laufen im Segment=%x\n",
getpid(), getcs());
show_menu();
printf("Command ? ");
gets(name);
if (name[0]==0)
continue;
cmd = find_cmd(name);
printf("find_cmd = %d\n", cmd);
switch(cmd){
case 0 : getpid(); break;
case 1 : ps(); break;
case 2 : chname(); break;
case 3 : kmode(); break;
case 4 : kswitch(); break;
case 5 : wait(); break;
case 6 : exit(); break;
case 7 : fork(); break;
case 8 : exec(); break;
case 9 : pipe(); break;
case 10: pfd(); break;
case 11 : read_pipe(); break;
case 12 : write_pipe();break;
case 13: close(); break;
default: invalid(name); break;
}
}
}
int kcinth()
{
u16 segment, offset;
int a,b,c,d, r;
segment = running->uss;
offset = running->usp;
a = get_word(segment, offset + 2*PA);
b = get_word(segment, offset + 2*PB);
c = get_word(segment, offset + 2*PC);
d = get_word(segment, offset + 2*PD);
switch(a){
case 0 : r = running->pid; break;
case 1 : r = do_ps(); break;
case 2 : r = chname(b); break;
case 3 : r = kmode(); break;
case 4 : r = tswitch(); break;
case 5 : r = do_wait(b); break;
case 6 : r = do_exit(b); break;
case 7 : r = fork(); break;
case 8 : r = exec(b); break;
case 9 : r = vfork(); break;
case 30 : r = kpipe(b); break;
case 31 : r = read_pipe(b,c,d); break;
case 32 : r = write_pipe(b,c,d); break;
case 33 : r = close_pipe(b); break;
case 34 : r = pfd(); break;
case 90: r = getc(); break;
case 91: color=running->pid+11;
r = putc(b); break;
case 99: do_exit(b); break;
default: printf("invalid syscall # : %d\n", a);
}
put_word(r, segment, offset + 2*AX);
}
main()
{
char name[64]; int pid, cmd, segment, i;
pid = getpid();
color = 0x000B + (pid % 5); // avoid black on black baground
while(1){
pid = getpid();
color = 0x000B + (pid % 5);
segment = (pid+1)*0x1000;
printf("==============================================\n");
printf("I am proc %din U mode: segment=%x\n", pid, segment);
show_menu();
printf("Command ? ");
gets(name);
if (name[0]==0)
continue;
cmd = find_cmd(name);
switch(cmd){
case 0 : getpid(); break;
case 1 : ps(); break;
case 2 : chname(); break;
case 3 : kmode(); break;
case 4 : kswitch(); break;
case 5 : wait(); break;
case 6 : exit(); break;
case 7 : fork(); break;
case 8 : exec(); break;
case 9: pipe(); break;
case 10: pfd(); break;
case 11: read_pipe(); break;
case 12: write_pipe(); break;
case 13: close_pipe(); break;
default: invalid(name); break;
}
}
}
main()
{
char name[64]; int pid, cmd;
while(1){
pid = getpid();
color = 0x000B + (pid % 6);
printf("----------------------------------------------\n");
printf("I am proc %d in U mode: running segment=%x\n",getpid(), getcs());
show_menu();
printf("Command ? ");
gets(name);
if (name[0]==0)
continue;
cmd = find_cmd(name);
printf("find_cmd = %d\n", cmd);
/*char *cmd[]={"getpid", "ps", "chname", "kmode", "switch", "wait", "exit",
"fork", "exec", "pipe", "pfd", "read", "write", "close", 0};*/
switch(cmd){
case 0 : getpid(); break;
case 1 : ps(); break;
case 2 : chname(); break;
case 3 : kmode(); break;
case 4 : kswitch(); break;
case 5 : wait(); break;
case 6 : exit(); break;
case 7 : fork(); break;
case 8 : exec(); break;
case 9 : pipe(); break;
case 10: pfd(); break;
case 11 : read_pipe(); break;
case 12 : write_pipe();break;
case 13: close_pipe(); break;
default: invalid(name); break;
}
}
}
static int
lwrite(lua_State *L) {
HANDLE pipe = lua_touserdata(L, 1);
size_t sz = 0;
const char * data = luaL_checklstring(L, 2, &sz);
int offset = luaL_optinteger(L, 3, 0);
if (offset >= sz) {
return luaL_error(L, "invalid offset");
}
data += offset;
sz -= offset;
unsigned long error = 0;
int wt = write_pipe(pipe, data, sz, &error);
if (error != 0) {
return luaL_error(L, "write error : %u", error);
}
if (wt == sz)
return 0;
lua_pushinteger(L, offset + wt);
return 1;
}
int sys_write(unsigned int fd,char * buf,int count)
{
struct file * file;
struct m_inode * inode;
if (fd>=NR_OPEN || count <0 || !(file=current->filp[fd]))
return -EINVAL;
if (!count)
return 0;
inode=file->f_inode;
if (inode->i_pipe)
return (file->f_mode&2)?write_pipe(inode,buf,count):-EIO;
if (S_ISCHR(inode->i_mode))
return rw_char(WRITE,inode->i_zone[0],buf,count,&file->f_pos);
if (S_ISBLK(inode->i_mode))
return block_write(inode->i_zone[0],&file->f_pos,buf,count);
if (S_ISREG(inode->i_mode))
return file_write(inode,file,buf,count);
printk("(Write)inode->i_mode=%06o\n\r",inode->i_mode);
return -EINVAL;
}
/**
* @author Tom Nightingale
*
* @brief The translate process.
* @details This process handles translation of the input buffer. Whenever the input process
* writes data onto the pipe, this process will read it off and parse it according
* to the following rules.
* * X: Backspace character.
* * a: Translated into z.
* * T: Terminate character.
*
* @param rxpipe_input
* A pipe read file descriptor for receiving data from the output process.
* @param txpipe_output
* A pipe write file descriptor for sending data to the output process.
*/
void translate_proc(int rxpipe_input, int txpipe_output) {
int nread;
int i = 0;
int j = 0;
int finished = 0;
char buffer[BUFFSIZE];
char translated[BUFFSIZE];
while (!finished && (nread = read_pipe(rxpipe_input, buffer, BUFFSIZE)) >= 0) {
// Process each character received.
for (i = 0, j = 0; !finished && i < nread; i++) {
switch (buffer[i]) {
// "Backspace" character.
case 'X':
// Don't backspace if nothing there.
j = (j > 0) ? j - 1 : 0;
break;
case 'T':
finished = TRUE;
translated[j++] = '\0';
break;
// Replacement.
case 'a':
buffer[i] = 'z';
// fall through.
default:
translated[j++] = buffer[i];
break;
}
}
// Terminate translated string.
translated[j - 1] = '\0';
write_pipe(txpipe_output, translated, j);
}
}
/****************** syscall handler in C ***************************/
int kcinth()
{
int a,b,c,d, r;
//WRITE CODE TO GET get syscall parameters a,b,c,d from ustack
a = get_word(running->uss, running->usp + 26);
b = get_word(running->uss, running->usp + 28);
c = get_word(running->uss, running->usp + 30);
d = get_word(running->uss, running->usp + 32);
switch(a){
case 0 : r = kgetpid(); break;
case 1 : r = kps(); break;
case 2 : r = kchname(b); break;
case 3 : r = kmode(); break;
case 4 : r = tswitch(); break;
case 5 : r = kkwait(b); break;
case 6 : r = kkexit(b); break;
case 7 : r = fork(); break;
case 8 : r = kexec(b); break;
case 30: r = kpipe(b); break;
case 31: r = read_pipe(b,c,d); break;
case 32: r = write_pipe(b,c,d);break;
case 33: r = close_pipe(b); break;
case 34: r = pfd(); break;
case 90: r = getc(); break;
case 91: r = putc(b); break;
case 99: kkexit(b); break;
default: printf("invalid syscall # : %d\n", a);
}
//WRITE CODE to let r be the return value to Umode
put_word(r, running->uss, running->usp + 16);
return r;
}
bool WhmShellProcess::run(WhmShellContext *sc)
{
WhmShellCommand *c = command;
bool result = true;
Token_t token = NULL;
#ifndef HTTP_PROXY
if (runAsUser) {
//创建运行身份令牌
if (sc->vh==NULL) {
sc->last_error = 128;
return false;
}
token = sc->vh->createToken(result);
if(!result){
sc->last_error = 129;
return false;
}
}
#endif
//the commands stdout pipe
PIPE_T big_stdout_pipe[2];
if (!KPipeStream::create(big_stdout_pipe)) {
if (token) {
KVirtualHost::closeToken(token);
}
return false;
}
//the commands stdin pipe
PIPE_T big_stdin_pipe[2];
bool big_stdin_pipe_created = false;
//init the std file
PIPE_T hstdin = get_stdin(sc);
if (hstdin==INVALIDE_PIPE && sc->in_buffer.getLen()>0) {
//如果没有输入文件并且输入有数据。就要创建输入管道
if (!KPipeStream::create(big_stdin_pipe)) {
//关闭打开的big_stdout_pipe
ClosePipe(big_stdout_pipe[0]);
ClosePipe(big_stdout_pipe[1]);
if (token) {
KVirtualHost::closeToken(token);
}
return false;
}
big_stdin_pipe_created = true;
hstdin = big_stdin_pipe[READ_PIPE];
}
PIPE_T hstdout = get_stdout(sc);
PIPE_T hstderr = get_stderr(sc);
PIPE_T in,out,err;
err = hstderr;
if (err==INVALIDE_PIPE) {
err = big_stdout_pipe[WRITE_PIPE];
}
PIPE_T pp[2];
for(int i=0;i<2;i++){
pp[i] = INVALIDE_PIPE;
}
while (c) {
char **arg = c->makeArgs(sc);
KCmdEnv *env = c->makeEnv(sc);
pid_t pid;
kfinit(pid);
//set in
if (c==command) {
in = hstdin;
} else {
assert(pp[READ_PIPE]!=INVALIDE_PIPE);
in = pp[READ_PIPE];
pp[READ_PIPE] = INVALIDE_PIPE;
assert(pp[WRITE_PIPE]!=INVALIDE_PIPE);
//close the out pipe
ClosePipe(pp[WRITE_PIPE]);
pp[WRITE_PIPE] = INVALIDE_PIPE;
}
//set out
if (c->next) {
//create a new pipe
if (!KPipeStream::create(pp)) {
if (c!=command) {
ClosePipe(in);
}
break;
}
out = pp[WRITE_PIPE];
} else {
//if the command is last.
//then set the out to big_pipe
out = hstdout;
if (out==INVALIDE_PIPE) {
out = big_stdout_pipe[WRITE_PIPE];
}
}
char *curdir2 = NULL;
if (curdir) {
curdir2 = sc->parseString(curdir);
}
result = createProcess(token,arg,env,curdir2,in,out,err,pid);
if (curdir2) {
free(curdir2);
}
if (c!=command) {
//close the in pipe
ClosePipe(in);
}
//free args
for (int i=0;;i++) {
if(arg[i]==NULL){
break;
}
free(arg[i]);
}
delete[] arg;
if (env) {
delete env;
}
sc->setLastPid(pid);
if (!result) {
sc->last_error = 127;
break;
}
c = c->next;
}
//关闭输入，输出父进程无用的管道端
if (kflike(hstdin)) {
ClosePipe(hstdin);
}
ClosePipe(big_stdout_pipe[WRITE_PIPE]);
//处理输入
if (big_stdin_pipe_created) {
if (result) {
//创建成功才写入数据
buff *buf = sc->in_buffer.getHead();
while (buf && buf->data) {
if (write_pipe(big_stdin_pipe[WRITE_PIPE],buf->data,buf->used)!=buf->used) {
break;
}
buf = buf->next;
}
}
//清理输入数据和管道资源
sc->in_buffer.destroy();
ClosePipe(big_stdin_pipe[WRITE_PIPE]);
}
//处理输出
if (result && (hstdout==INVALIDE_PIPE || hstderr==INVALIDE_PIPE)) {
for (;;) {
char buf[512];
int len = read_pipe(big_stdout_pipe[READ_PIPE],buf,512);
if (len<=0) {
break;
}
sc->lock.Lock();
if (sc->out_buffer.getLen() > 1048576) {
//the out msg is too large.drop it.
sc->lock.Unlock();
fwrite(buf,1,len,stdout);
} else {
sc->out_buffer.write_all(buf,len);
sc->lock.Unlock();
}
//fwrite(buf,1,len,stdout);
}
}
if (kflike(hstdout)) {
ClosePipe(hstdout);
}
if (kflike(hstderr)) {
ClosePipe(hstderr);
}
ClosePipe(big_stdout_pipe[READ_PIPE]);
if (token) {
KVirtualHost::closeToken(token);
}
#ifdef _WIN32
if (kflike(sc->last_pid)) {
WaitForSingleObject(sc->last_pid,INFINITE);
}
#endif
return result;
}
int main(int argc, char *argv[])
{
struct sockaddr_in serv_addr;
int port;
struct hostent hptr;
int serv_sockfd;
int isConnected,pfd,rc;
char buff[1024],msg[1024];
if(argc!=4)
{
fprintf(stderr,"ERROR \t: USAGE : echocli <ip/host-name> <port> <pipe-fd>\n");
return EXIT_FAILURE;
}
pfd = atoi(argv[3]);
Getsockaddr(argv[1],&serv_addr);
char ipstr[20];
memset(ipstr,0,sizeof(ipstr));
inet_ntop(AF_INET, &(serv_addr.sin_addr), ipstr, sizeof(ipstr));
port = atoi(argv[2]);
if(port < 1025)
{
fprintf(stderr,"ERROR \t: PORT NUMBER SHOULD BE GREATER THAN 1024\n");
return EXIT_FAILURE;
}
//serv_sockfd = createtcpsocket(port,&serv_addr);
serv_addr.sin_port = htons(port);
serv_sockfd = Socket(AF_INET, SOCK_STREAM, 0);
if(serv_sockfd > 0 )
isConnected = tcpConnect(serv_sockfd,serv_addr,port);
char status[1024];
int errcode = EXIT_SUCCESS;
memset(status,0,sizeof(status));
if(isConnected)
{
strcpy(status,"STATUS \t: Connected to Server...");
//write_pipe(pfd,status,strlen(status));
}
else
{
strcpy(status,"STATUS \t: ");
strcat(status,strerror(errno));
//printf("%s\n",status);
write_pipe(pfd,status,strlen(status));
}
int l=0;
struct timeval timeout;
fd_set master_fds, curr_fds;
int maxfd;
int ready_fd_count =0;
int i=0;
printf("-----------------------------------------------------------------------\n ECHO MSG \t: ");
char back_buff[1024];
memset(back_buff,0,sizeof(back_buff));
do
{
FD_ZERO(&master_fds);
maxfd = serv_sockfd+1;
FD_SET(fileno(stdin),&master_fds);
FD_SET(serv_sockfd,&master_fds);
fflush(stdout);
fflush(stdout);
memset(msg,0,sizeof(msg));
memset(buff,0,sizeof(buff));
rc = select(maxfd,&master_fds,NULL,NULL,NULL);
if(rc < 0)
{
perror("select() failed");
break;
}
if( rc == 0)
{
printf("SELECT TIMED OUT\n");
break;
}
for(i=0;i<maxfd;i++)
{
if(FD_ISSET(i,&master_fds))
{
if(i==fileno(stdin))
{
memset(msg,0,sizeof(msg));
fgets(msg, sizeof(msg),stdin);
strcpy(back_buff,msg);
l = strlen(msg);
msg[l] = '\n';
if((l=writen(serv_sockfd,msg,l)) <0)
{
//send to parent that the echo request was sent to server.
memset(status,0,sizeof(status));
strcpy(status,"ERROR \t: Write to Echo Server Failed");
//printf("%s\n",status);
isConnected = false;
shutdown(serv_sockfd,2);
close(serv_sockfd);
rc = write_pipe(pfd,status,sizeof(buff));
if(rc == -1)
printf("PIPE CLOSED. I could be an orphan process now.. :(");
break;
}
}
if(i==serv_sockfd)
{
memset(buff,0,sizeof(buff));
if((rc=read(serv_sockfd,buff,sizeof(buff)))<0)
{
//send to parent that echo server responded back.
memset(status,0,sizeof(status));
strcpy(status,"ERROR \t: Read from Echo Server Failed");
//rc = write_pipe(pfd,status,sizeof(status));
shutdown(serv_sockfd,2);
close(serv_sockfd);
isConnected = false;
break;
//puts(buff);
}
else
{
//printf("LOG : read %d bytes from server \n",rc);
if(rc == 0)
{
if(errno == EINTR)
{
printf("STATUS \t: EINTR\n");
continue;
}
else
{
isConnected = false;
memset(status,0,sizeof(status));
strcpy(status,"STATUS \t: ECHO SERVER IS DOWN");
rc = write_pipe(pfd,status,strlen(status));
break;
}
}
printf("Echo Response \t: %s",buff);
printf("-----------------------------------------------------------------------\nECHO MSG \t: ");
fflush(stdout);
fflush(stdout);
memset(status,0,sizeof(status));
if(strcmp(back_buff,buff) == 0)
{
strcpy(status,"STATUS \t: ECHO SERVER WORKS PROPERLY");
rc = write_pipe(pfd,status,strlen(status));
//printf("%s\n",status);
}
else
{
strcpy(status,"STATUS \t: ECHO SERVER IS ERRORNEOUS");
rc = write_pipe(pfd,status,strlen(status));
//printf("%s\n",status);
//printf("SENT : %s\n RECVD :%s\n",back_buff,buff);
errcode = EXIT_FAILURE;
break;
}
memset(back_buff,0,sizeof(back_buff));
}
}
}
}
}while(isConnected);
printf("I am done\n");
shutdown(serv_sockfd,2);
close(serv_sockfd);
exit(-1);
}
