X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=KernelLand%2FKernel%2Fdrv%2Fpty.c;h=937300343499dfc4516629d71f3f8ebe4f4388ab;hb=ea487239a8b3632d13c6e4ec92d21f0fcd460bdd;hp=3b59c7e47332e9af9044a987345acb2312cc840c;hpb=01f3ca563b67a2d0f9171b2a301aff1dfebe1465;p=tpg%2Facess2.git diff --git a/KernelLand/Kernel/drv/pty.c b/KernelLand/Kernel/drv/pty.c index 3b59c7e4..93730034 100644 --- a/KernelLand/Kernel/drv/pty.c +++ b/KernelLand/Kernel/drv/pty.c @@ -13,6 +13,7 @@ #include #include #include +#include // === CONSTANTS === #define OUTPUT_RINGBUFFER_LEN 1024 // Number of bytes in output queue before client blocks @@ -49,10 +50,11 @@ struct sPTY int OutputReadPos; char OutputData[OUTPUT_RINGBUFFER_LEN]; + tVFS_Node *ServerNode; tVFS_Node ClientNode; - tVFS_Node ServerNode; tVFS_ACL OwnerRW; - + + tPGID ControllingProcGroup; // TODO: Maintain list of client PIDs }; @@ -60,7 +62,6 @@ struct sPTY int PTY_Install(char **Arguments); int PTY_ReadDir(tVFS_Node *Node, int Pos, char Name[FILENAME_MAX]); tVFS_Node *PTY_FindDir(tVFS_Node *Node, const char *Name, Uint Flags); -tVFS_Node *PTY_MkNod(tVFS_Node *Node, const char *Name, Uint Mode); size_t _rb_write(void *buf, size_t buflen, int *rd, int *wr, const void *data, size_t len); size_t _rb_read(void *buf, size_t buflen, int *rd, int *wr, void *data, size_t len); @@ -69,13 +70,12 @@ size_t PTY_int_SendInput(tPTY *PTY, const char *Input, size_t Length); // PTY_SendInput size_t PTY_ReadClient(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags); size_t PTY_WriteClient(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags); - int PTY_IOCtlClient(tVFS_Node *Node, int ID, void *Arg); void PTY_ReferenceClient(tVFS_Node *Node); void PTY_CloseClient(tVFS_Node *Node); size_t PTY_ReadServer(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags); size_t PTY_WriteServer(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags); - int PTY_IOCtlServer(tVFS_Node *Node, int ID, void *Arg); void PTY_CloseServer(tVFS_Node *Node); + int PTY_IOCtl(tVFS_Node *Node, int ID, void *Arg); // === GLOBALS === MODULE_DEFINE(0, 0x100, PTY, PTY_Install, NULL, NULL); @@ -83,13 +83,12 @@ tVFS_NodeType gPTY_NodeType_Root = { .TypeName = "PTY-Root", .ReadDir = PTY_ReadDir, .FindDir = PTY_FindDir, - .MkNod = PTY_MkNod }; tVFS_NodeType gPTY_NodeType_Client = { .TypeName = "PTY-Client", .Read = PTY_ReadClient, .Write = PTY_WriteClient, - .IOCtl = PTY_IOCtlClient, + .IOCtl = PTY_IOCtl, .Reference = PTY_ReferenceClient, .Close = PTY_CloseClient }; @@ -97,7 +96,7 @@ tVFS_NodeType gPTY_NodeType_Server = { .TypeName = "PTY-Server", .Read = PTY_ReadServer, .Write = PTY_WriteServer, - .IOCtl = PTY_IOCtlServer, + .IOCtl = PTY_IOCtl, .Close = PTY_CloseServer }; tDevFS_Driver gPTY_Driver = { @@ -167,7 +166,7 @@ tPTY *PTY_Create(const char *Name, void *Handle, tPTY_OutputFcn Output, tPTY_Req break; idx ++; } - namelen = 0; + namelen = snprintf(NULL,0, "%u", idx); } tPTY *ret = calloc(sizeof(tPTY) + namelen + 1, 1); @@ -184,21 +183,13 @@ tPTY *PTY_Create(const char *Name, void *Handle, tPTY_OutputFcn Output, tPTY_Req if(Name) strcpy(ret->Name, Name); else - ret->Name[0] = 0; + sprintf(ret->Name, "%u", idx); ret->NumericName = idx; // - Output function and handle (same again) ret->OutputHandle = Handle; ret->OutputFcn = Output; ret->ReqResize = ReqResize; ret->ModeSet = ModeSet; - // - Server node - ret->ServerNode.ImplPtr = ret; - ret->ServerNode.Type = &gPTY_NodeType_Server; - ret->ServerNode.UID = Threads_GetUID(); - ret->ServerNode.GID = Threads_GetGID(); - ret->ServerNode.NumACLs = 1; - ret->ServerNode.ACLs = &ret->OwnerRW; - ret->ServerNode.ReferenceCount = (Output ? 1 : 0); // Prevent a userland close killing a kernel pty // - Client node ret->ClientNode.ImplPtr = ret; ret->ClientNode.Type = &gPTY_NodeType_Client; @@ -285,9 +276,7 @@ void PTY_Close(tPTY *PTY) size_t _rb_write(void *buf, size_t buflen, int *rd, int *wr, const void *data, size_t len) { size_t space = (*rd - *wr + buflen - 1) % buflen; - ENTER("pbuf ibuflen prd pwr pdata ilen", buf, buflen, rd, wr, data, len); len = MIN(space, len); - LOG("space = %i, *rd = %i, *wr = %i", space, *rd, *wr); if(*wr + len >= buflen) { size_t prelen = buflen - *wr; memcpy((char*)buf + *wr, data, prelen); @@ -298,7 +287,6 @@ size_t _rb_write(void *buf, size_t buflen, int *rd, int *wr, const void *data, s memcpy((char*)buf + *wr, data, len); *wr += len; } - LEAVE('i', len); return len; } size_t _rb_read(void *buf, size_t buflen, int *rd, int *wr, void *data, size_t len) @@ -330,8 +318,8 @@ size_t PTY_int_WriteInput(tPTY *PTY, const char *Input, size_t Length) Mutex_Release(&PTY->InputMutex); VFS_MarkAvaliable(&PTY->ClientNode, 1); - if(ret < Length) - VFS_MarkFull(&PTY->ServerNode, 1); + if(ret < Length && PTY->ServerNode) + VFS_MarkFull(PTY->ServerNode, 1); return ret; } @@ -436,41 +424,27 @@ int PTY_ReadDir(tVFS_Node *Node, int Pos, char Name[FILENAME_MAX]) { tPTY *pty = NULL; int idx = Pos; - if( idx < giPTY_NumCount * 2 ) + if( idx < giPTY_NumCount ) { RWLock_AcquireRead(&glPTY_NumPTYs); - for( pty = gpPTY_FirstNumPTY; pty; pty = pty->Next ) - { - if( idx < 2 ) - break; - idx -= 2; - } + for( pty = gpPTY_FirstNumPTY; pty && idx; pty = pty->Next ) + idx --; RWLock_Release(&glPTY_NumPTYs); } - else if( idx < (giPTY_NumCount + giPTY_NamedCount) * 2 ) + else if( idx < (giPTY_NumCount + giPTY_NamedCount) ) { - idx -= giPTY_NumCount*2; + idx -= giPTY_NumCount; RWLock_AcquireRead(&glPTY_NamedPTYs); - for( pty = gpPTY_FirstNamedPTY; pty; pty = pty->Next ) - { - if( idx < 2 ) - break; - idx -= 2; - } + for( pty = gpPTY_FirstNamedPTY; pty && idx; pty = pty->Next ) + idx --; RWLock_Release(&glPTY_NamedPTYs); } - if( !pty ) { - LOG("%i out of range", Pos); return -1; } - - if( pty->Name[0] ) - snprintf(Name, FILENAME_MAX, "%s%c", pty->Name, (idx == 0 ? 'c' : 's')); - else - snprintf(Name, FILENAME_MAX, "%i%c", pty->NumericName, (idx == 0 ? 'c' : 's')); - LOG("Return '%s'", Name); + + strncpy(Name, pty->Name, FILENAME_MAX); return 0; } @@ -478,17 +452,19 @@ tVFS_Node *PTY_FindDir(tVFS_Node *Node, const char *Name, Uint Flags) { char *end; int num = strtol(Name, &end, 10); + + if( strcmp(Name, "ptmx") == 0 ) { + tVFS_Node *ret = calloc(sizeof(tVFS_Node), 1); + ret->Size = -1; + ret->Type = &gPTY_NodeType_Server; + return ret; + } - if( Name[0] == '\0' || Name[1] == '\0' ) - return NULL; - - size_t len = strlen(Name); - if( Name[len-1] != 'c' && Name[len-1] != 's' ) + if( Name[0] == '\0' ) return NULL; - int isServer = (Name[len-1] != 'c'); tPTY *ret = NULL; - if( num && (end[0] == 'c' || end[0] == 's') && end[1] == '\0' ) + if( num && end[0] == '\0' ) { // Numeric name RWLock_AcquireRead(&glPTY_NumPTYs); @@ -509,10 +485,10 @@ tVFS_Node *PTY_FindDir(tVFS_Node *Node, const char *Name, Uint Flags) RWLock_AcquireRead(&glPTY_NamedPTYs); for( tPTY *pty = gpPTY_FirstNamedPTY; pty; pty = pty->Next ) { - int cmp = strncmp(pty->Name, Name, len-1); + int cmp = strcmp(pty->Name, Name); if(cmp > 0) break; - if(cmp == 0 && pty->Name[len-1] == '\0' ) { + if(cmp == 0 ) { ret = pty; break; } @@ -520,7 +496,7 @@ tVFS_Node *PTY_FindDir(tVFS_Node *Node, const char *Name, Uint Flags) RWLock_Release(&glPTY_NamedPTYs); } if( ret ) { - tVFS_Node *retnode = (isServer ? &ret->ServerNode : &ret->ClientNode); + tVFS_Node *retnode = &ret->ClientNode; retnode->ReferenceCount ++; return retnode; } @@ -528,26 +504,6 @@ tVFS_Node *PTY_FindDir(tVFS_Node *Node, const char *Name, Uint Flags) return NULL; } -tVFS_Node *PTY_MkNod(tVFS_Node *Node, const char *Name, Uint Mode) -{ - // zero-length name means a numbered pty has been requested - if( Name[0] == '\0' || (Name[0] == '#' && Name[1] == '\0') ) - { - tPTY *ret = PTY_Create(NULL, NULL, NULL, NULL, NULL); - if( !ret ) - return NULL; - return &ret->ServerNode; - } - - // Otherwise return a named PTY - // TODO: Should the request be for 's' or just '' - - tPTY *ret = PTY_Create(Name, NULL, NULL, NULL, NULL); - if(!ret) - return NULL; - return &ret->ServerNode; -} - //\! Read from the client's input size_t PTY_ReadClient(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags) { @@ -558,7 +514,7 @@ size_t PTY_ReadClient(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer int rv; _select: // If server has disconnected, return EIO - if( pty->ServerNode.ReferenceCount == 0 ) { + if( pty->ServerNode && pty->ServerNode->ReferenceCount == 0 ) { //Threads_PostSignal(SIGPIPE); errno = EIO; return -1; @@ -573,6 +529,8 @@ _select: Mutex_Acquire(&pty->InputMutex); Length = _rb_read(pty->InputData, INPUT_RINGBUFFER_LEN, &pty->InputReadPos, &pty->InputWritePos, Buffer, Length); + if( Length && pty->ServerNode ) + VFS_MarkFull(pty->ServerNode, 0); Mutex_Release(&pty->InputMutex); if(pty->InputReadPos == pty->InputWritePos) @@ -592,59 +550,38 @@ size_t PTY_WriteClient(tVFS_Node *Node, off_t Offset, size_t Length, const void tPTY *pty = Node->ImplPtr; // If the server has terminated, send SIGPIPE - if( pty->ServerNode.ReferenceCount == 0 ) + if( pty->ServerNode && pty->ServerNode->ReferenceCount == 0 ) { - //Threads_PostSignal(SIGPIPE); + Threads_PostSignal(SIGPIPE); errno = EIO; return -1; } // Write to either FIFO or directly to output function - if( pty->OutputFcn ) - { + if( pty->OutputFcn ) { pty->OutputFcn(pty->OutputHandle, Length, Buffer); - } - else - { - // Write to output ringbuffer - Length = _rb_write(pty->OutputData, OUTPUT_RINGBUFFER_LEN, - &pty->OutputReadPos, &pty->OutputWritePos, - Buffer, Length); - VFS_MarkAvaliable(&pty->ServerNode, 1); + return Length; } - return Length; -} - -int PTY_IOCtlClient(tVFS_Node *Node, int ID, void *Data) -{ - tPTY *pty = Node->ImplPtr; - struct ptymode *mode = Data; - struct ptydims *dims = Data; - switch(ID) - { - case DRV_IOCTL_TYPE: return DRV_TYPE_TERMINAL; - case DRV_IOCTL_IDENT: memcpy(Data, "PTY\0", 4); return 0; - case DRV_IOCTL_VERSION: return 0x100; - case DRV_IOCTL_LOOKUP: return 0; + // FIFO + tTime timeout_z, *timeout = (Flags & VFS_IOFLAG_NOBLOCK) ? &timeout_z : NULL; + int rv; - case PTY_IOCTL_GETMODE: - if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } - *mode = pty->Mode; - return 0; - case PTY_IOCTL_SETMODE: - if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } - return PTY_SetAttrib(pty, NULL, mode, 1); - case PTY_IOCTL_GETDIMS: - if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } - *dims = pty->Dims; - return 0; - case PTY_IOCTL_SETDIMS: - if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } - return PTY_SetAttrib(pty, dims, NULL, 1); + rv = VFS_SelectNode(Node, VFS_SELECT_WRITE, timeout, "PTY_WriteClient"); + if(!rv) { + errno = (timeout ? EWOULDBLOCK : EINTR); + return -1; } - errno = ENOSYS; - return -1; + + // Write to output ringbuffer + Length = _rb_write(pty->OutputData, OUTPUT_RINGBUFFER_LEN, + &pty->OutputReadPos, &pty->OutputWritePos, + Buffer, Length); + VFS_MarkAvaliable(pty->ServerNode, 1); + if( (pty->OutputWritePos + 1) % OUTPUT_RINGBUFFER_LEN == pty->OutputReadPos ) + VFS_MarkFull(Node, 1); + + return Length; } void PTY_ReferenceClient(tVFS_Node *Node) @@ -663,9 +600,12 @@ void PTY_CloseClient(tVFS_Node *Node) // TODO: Maintain list of client processes // Free structure if this was the last open handle - if( Node->ReferenceCount == 0 && pty->ServerNode.ReferenceCount == 0 ) + if( Node->ReferenceCount > 0 ) + return ; + if( pty->ServerNode && pty->ServerNode->ReferenceCount == 0 ) { // Free the structure! (Should be off the PTY list now) + free(pty->ServerNode); free(pty); } } @@ -674,6 +614,10 @@ void PTY_CloseClient(tVFS_Node *Node) size_t PTY_ReadServer(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer, Uint Flags) { tPTY *pty = Node->ImplPtr; + if( !pty ) { + errno = EIO; + return -1; + } // TODO: Prevent two servers fighting over client's output if( pty->OutputFcn ) @@ -702,44 +646,27 @@ size_t PTY_ReadServer(tVFS_Node *Node, off_t Offset, size_t Length, void *Buffer //\! Write to the client's input size_t PTY_WriteServer(tVFS_Node *Node, off_t Offset, size_t Length, const void *Buffer, Uint Flags) -{ - return PTY_SendInput(Node->ImplPtr, Buffer, Length); -} - -int PTY_IOCtlServer(tVFS_Node *Node, int ID, void *Data) { tPTY *pty = Node->ImplPtr; - struct ptymode *mode = Data; - struct ptydims *dims = Data; - switch(ID) - { - case DRV_IOCTL_TYPE: return DRV_TYPE_TERMINAL; - case DRV_IOCTL_IDENT: memcpy(Data, "PTY\0", 4); return 0; - case DRV_IOCTL_VERSION: return 0x100; - case DRV_IOCTL_LOOKUP: return 0; - - case PTY_IOCTL_GETMODE: - if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } - *mode = pty->Mode; - // ACK client's SETMODE - return 0; - case PTY_IOCTL_SETMODE: - if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } - PTY_SetAttrib(pty, NULL, mode, 0); - return 0; - case PTY_IOCTL_GETDIMS: - if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } - *dims = pty->Dims; - return 0; - case PTY_IOCTL_SETDIMS: - if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } - PTY_SetAttrib(pty, dims, NULL, 0); - break; - case PTY_IOCTL_GETID: - return pty->NumericName; + if( !pty ) { + errno = EIO; + return -1; } - errno = ENOSYS; - return -1; + + tTime timeout_z = 0, *timeout = (Flags & VFS_IOFLAG_NOBLOCK) ? &timeout_z : NULL; + int rv = VFS_SelectNode(Node, VFS_SELECT_WRITE, timeout, "PTY_WriteServer"); + if(!rv) { + errno = (timeout ? EWOULDBLOCK : EINTR); + return -1; + } + size_t used = 0; + do { + used += PTY_SendInput(Node->ImplPtr, Buffer, Length); + } while( used < Length && !(Flags & VFS_IOFLAG_NOBLOCK) ); + + if( (pty->InputWritePos+1)%INPUT_RINGBUFFER_LEN == pty->InputReadPos ) + VFS_MarkFull(Node, 1); + return used; } void PTY_CloseServer(tVFS_Node *Node) @@ -753,7 +680,7 @@ void PTY_CloseServer(tVFS_Node *Node) // Locate on list and remove tPTY **prev_np; - if( pty->Name[0] ) { + if( pty->NumericName == -1 ) { RWLock_AcquireWrite(&glPTY_NamedPTYs); prev_np = &gpPTY_FirstNamedPTY; } @@ -775,7 +702,7 @@ void PTY_CloseServer(tVFS_Node *Node) } // Clean up lock - if( pty->Name[0] ) { + if( pty->NumericName == -1 ) { RWLock_Release(&glPTY_NamedPTYs); giPTY_NamedCount --; } @@ -784,8 +711,86 @@ void PTY_CloseServer(tVFS_Node *Node) giPTY_NumCount --; } + // Send SIGHUP to controling PGID + if( pty->ControllingProcGroup > 0 ) { + Threads_SignalGroup(pty->ControllingProcGroup, SIGHUP); + } + // If there are no open children, we can safely free this PTY - if( pty->ClientNode.ReferenceCount == 0 ) + if( pty->ClientNode.ReferenceCount == 0 ) { + free(Node); free(pty); + } +} + +int PTY_IOCtl(tVFS_Node *Node, int ID, void *Data) +{ + tPTY *pty = Node->ImplPtr; + struct ptymode *mode = Data; + struct ptydims *dims = Data; + + int is_server = !pty || Node == pty->ServerNode; + + switch(ID) + { + case DRV_IOCTL_TYPE: return DRV_TYPE_TERMINAL; + case DRV_IOCTL_IDENT: memcpy(Data, "PTY\0", 4); return 0; + case DRV_IOCTL_VERSION: return 0x100; + case DRV_IOCTL_LOOKUP: return 0; + + case PTY_IOCTL_GETMODE: + if( !pty ) return 0; + if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } + *mode = pty->Mode; + // TODO: ACK client's SETMODE + return 0; + case PTY_IOCTL_SETMODE: + if( !pty ) return 0; + if( !CheckMem(Data, sizeof(*mode)) ) { errno = EINVAL; return -1; } + PTY_SetAttrib(pty, NULL, mode, !is_server); + return 0; + case PTY_IOCTL_GETDIMS: + if( !pty ) return 0; + if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } + *dims = pty->Dims; + return 0; + case PTY_IOCTL_SETDIMS: + if( !pty ) return 0; + if( !CheckMem(Data, sizeof(*dims)) ) { errno = EINVAL; return -1; } + PTY_SetAttrib(pty, dims, NULL, !is_server); + return 0; + case PTY_IOCTL_GETID: + if( pty ) + { + size_t len = strlen(pty->Name)+1; + if( Data ) + { + if( !CheckMem(Data, len) ) { errno = EINVAL; return -1; } + strcpy(Data, pty->Name); + } + return len; + } + return 0; + case PTY_IOCTL_SETID: + if( Data && !CheckString(Data) ) { errno = EINVAL; return -1; } + if( pty ) return EALREADY; + pty = PTY_Create(Data, NULL, NULL,NULL, NULL); + if(pty == NULL) + return 1; + Node->ImplPtr = pty; + pty->ServerNode = Node; + return 0; + case PTY_IOCTL_SETPGRP: + // TODO: Should this only be done by client? + if( Data ) + { + if( !CheckMem(Data, sizeof(tPGID)) ) { errno = EINVAL; return -1; } + pty->ControllingProcGroup = *(tPGID*)Data; + Log_Debug("PTY", "Set controlling PGID to %i", pty->ControllingProcGroup); + } + return pty->ControllingProcGroup; + } + errno = ENOSYS; + return -1; }