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https://github.com/freebsd/freebsd-src
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1829 lines
53 KiB
C
1829 lines
53 KiB
C
/*
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* tclUnixChan.c
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*
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* Common channel driver for Unix channels based on files, command
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* pipes and TCP sockets.
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*
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* Copyright (c) 1995-1996 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tclUnixChan.c 1.161 96/04/18 08:28:54
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*/
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#include "tclInt.h" /* Internal definitions for Tcl. */
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#include "tclPort.h" /* Portability features for Tcl. */
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/*
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* This structure describes per-instance state of a pipe based channel.
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*/
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typedef struct PipeState {
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Tcl_File readFile; /* Output from pipe. */
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Tcl_File writeFile; /* Input to pipe. */
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Tcl_File errorFile; /* Error output from pipe. */
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int numPids; /* How many processes are attached to this pipe? */
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int *pidPtr; /* The process IDs themselves. Allocated by
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* the creator of the pipe. */
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} PipeState;
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/*
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* This structure describes per-instance state of a tcp based channel.
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*/
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typedef struct TcpState {
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int flags; /* ORed combination of the
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* bitfields defined below. */
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Tcl_File sock; /* The socket itself. */
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Tcl_TcpAcceptProc *acceptProc; /* Proc to call on accept. */
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ClientData acceptProcData; /* The data for the accept proc. */
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} TcpState;
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/*
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* These bits may be ORed together into the "flags" field of a TcpState
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* structure.
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*/
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#define TCP_ASYNC_SOCKET (1<<0) /* Asynchronous socket. */
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#define TCP_ASYNC_CONNECT (1<<1) /* Async connect in progress. */
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/*
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* The following defines how much buffer space the kernel should maintain
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* for a socket.
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*/
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#define SOCKET_BUFSIZE 4096
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/*
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* Static routines for this file:
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*/
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static int CommonBlockModeProc _ANSI_ARGS_((
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ClientData instanceData, Tcl_File inFile,
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Tcl_File outFile, int mode));
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static TcpState * CreateSocket _ANSI_ARGS_((Tcl_Interp *interp,
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int port, char *host, int server,
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char *myaddr, int myport, int async));
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static int CreateSocketAddress _ANSI_ARGS_(
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(struct sockaddr_in *sockaddrPtr,
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char *host, int port));
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static int FileCloseProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_Interp *interp, Tcl_File inFile,
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Tcl_File outFile));
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static int FilePipeInputProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_File inFile, char *buf, int toRead,
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int *errorCode));
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static int FilePipeOutputProc _ANSI_ARGS_((
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ClientData instanceData, Tcl_File outFile,
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char *buf, int toWrite, int *errorCode));
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static int FileSeekProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_File inFile, Tcl_File outFile, long offset,
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int mode, int *errorCode));
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static int PipeCloseProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_Interp *interp, Tcl_File inFile,
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Tcl_File outFile));
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static void TcpAccept _ANSI_ARGS_((ClientData data, int mask));
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static int TcpBlockModeProc _ANSI_ARGS_((ClientData data,
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Tcl_File inFile, Tcl_File outFile, int mode));
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static int TcpCloseProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_Interp *interp, Tcl_File inFile,
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Tcl_File outFile));
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static int TcpGetOptionProc _ANSI_ARGS_((ClientData instanceData,
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char *optionName, Tcl_DString *dsPtr));
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static int TcpInputProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_File infile, char *buf, int toRead,
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int *errorCode));
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static int TcpOutputProc _ANSI_ARGS_((ClientData instanceData,
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Tcl_File outFile, char *buf, int toWrite,
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int *errorCode));
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static int WaitForConnect _ANSI_ARGS_((TcpState *statePtr,
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Tcl_File fileToWaitFor, int *errorCodePtr));
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/*
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* This structure describes the channel type structure for file based IO:
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*/
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static Tcl_ChannelType fileChannelType = {
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"file", /* Type name. */
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CommonBlockModeProc, /* Set blocking/nonblocking mode.*/
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FileCloseProc, /* Close proc. */
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FilePipeInputProc, /* Input proc. */
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FilePipeOutputProc, /* Output proc. */
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FileSeekProc, /* Seek proc. */
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NULL, /* Set option proc. */
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NULL, /* Get option proc. */
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};
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/*
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* This structure describes the channel type structure for command pipe
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* based IO:
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*/
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static Tcl_ChannelType pipeChannelType = {
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"pipe", /* Type name. */
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CommonBlockModeProc, /* Set blocking/nonblocking mode.*/
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PipeCloseProc, /* Close proc. */
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FilePipeInputProc, /* Input proc. */
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FilePipeOutputProc, /* Output proc. */
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NULL, /* Seek proc. */
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NULL, /* Set option proc. */
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NULL, /* Get option proc. */
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};
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/*
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* This structure describes the channel type structure for TCP socket
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* based IO:
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*/
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static Tcl_ChannelType tcpChannelType = {
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"tcp", /* Type name. */
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TcpBlockModeProc, /* Set blocking/nonblocking mode.*/
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TcpCloseProc, /* Close proc. */
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TcpInputProc, /* Input proc. */
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TcpOutputProc, /* Output proc. */
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NULL, /* Seek proc. */
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NULL, /* Set option proc. */
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TcpGetOptionProc, /* Get option proc. */
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};
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/*
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*----------------------------------------------------------------------
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*
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* CommonBlockModeProc --
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*
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* Helper procedure to set blocking and nonblocking modes on a
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* channel. Invoked either by generic IO level code or by other
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* channel drivers after doing channel-type-specific inialization.
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*
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* Results:
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* 0 if successful, errno when failed.
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*
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* Side effects:
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* Sets the device into blocking or non-blocking mode.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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CommonBlockModeProc(instanceData, inFile, outFile, mode)
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ClientData instanceData; /* Unused. */
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Tcl_File inFile, outFile; /* Input, output files for channel. */
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int mode; /* The mode to set. Can be one of
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* TCL_MODE_BLOCKING or
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* TCL_MODE_NONBLOCKING. */
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{
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int curStatus;
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int fd;
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if (inFile != NULL) {
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fd = (int) Tcl_GetFileInfo(inFile, NULL);
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curStatus = fcntl(fd, F_GETFL);
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if (mode == TCL_MODE_BLOCKING) {
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curStatus &= (~(O_NONBLOCK));
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} else {
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curStatus |= O_NONBLOCK;
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}
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if (fcntl(fd, F_SETFL, curStatus) < 0) {
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return errno;
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}
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curStatus = fcntl(fd, F_GETFL);
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}
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if (outFile != NULL) {
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fd = (int) Tcl_GetFileInfo(outFile, NULL);
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curStatus = fcntl(fd, F_GETFL);
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if (mode == TCL_MODE_BLOCKING) {
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curStatus &= (~(O_NONBLOCK));
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} else {
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curStatus |= O_NONBLOCK;
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}
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if (fcntl(fd, F_SETFL, curStatus) < 0) {
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return errno;
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}
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}
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return 0;
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}
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/*
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*----------------------------------------------------------------------
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*
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* FilePipeInputProc --
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*
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* This procedure is invoked from the generic IO level to read
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* input from a file or command pipeline channel.
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*
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* Results:
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* The number of bytes read is returned or -1 on error. An output
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* argument contains a POSIX error code if an error occurs, or zero.
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*
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* Side effects:
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* Reads input from the input device of the channel.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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FilePipeInputProc(instanceData, inFile, buf, toRead, errorCodePtr)
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ClientData instanceData; /* Unused. */
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Tcl_File inFile; /* Input device for channel. */
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char *buf; /* Where to store data read. */
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int toRead; /* How much space is available
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* in the buffer? */
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int *errorCodePtr; /* Where to store error code. */
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{
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int fd; /* The OS handle for reading. */
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int bytesRead; /* How many bytes were actually
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* read from the input device? */
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*errorCodePtr = 0;
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fd = (int) Tcl_GetFileInfo(inFile, NULL);
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/*
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* Assume there is always enough input available. This will block
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* appropriately, and read will unblock as soon as a short read is
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* possible, if the channel is in blocking mode. If the channel is
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* nonblocking, the read will never block.
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*/
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bytesRead = read(fd, buf, (size_t) toRead);
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if (bytesRead > -1) {
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return bytesRead;
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}
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*errorCodePtr = errno;
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return -1;
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}
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/*
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*----------------------------------------------------------------------
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*
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* FilePipeOutputProc--
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*
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* This procedure is invoked from the generic IO level to write
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* output to a file or command pipeline channel.
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*
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* Results:
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* The number of bytes written is returned or -1 on error. An
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* output argument contains a POSIX error code if an error occurred,
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* or zero.
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*
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* Side effects:
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* Writes output on the output device of the channel.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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FilePipeOutputProc(instanceData, outFile, buf, toWrite, errorCodePtr)
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ClientData instanceData; /* Unused. */
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Tcl_File outFile; /* Output device for channel. */
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char *buf; /* The data buffer. */
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int toWrite; /* How many bytes to write? */
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int *errorCodePtr; /* Where to store error code. */
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{
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int written;
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int fd;
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*errorCodePtr = 0;
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fd = (int) Tcl_GetFileInfo(outFile, NULL);
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written = write(fd, buf, (size_t) toWrite);
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if (written > -1) {
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return written;
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}
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*errorCodePtr = errno;
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return -1;
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}
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/*
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*----------------------------------------------------------------------
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*
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* FileCloseProc --
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*
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* This procedure is called from the generic IO level to perform
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* channel-type-specific cleanup when a file based channel is closed.
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*
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* Results:
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* 0 if successful, errno if failed.
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*
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* Side effects:
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* Closes the device of the channel.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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FileCloseProc(instanceData, interp, inFile, outFile)
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ClientData instanceData; /* Unused. */
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Tcl_Interp *interp; /* For error reporting - unused. */
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Tcl_File inFile; /* Input file to close. */
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Tcl_File outFile; /* Output file to close. */
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{
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int fd, errorCode = 0;
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if (inFile != NULL) {
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/*
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* Check for read/write file so we only close it once.
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*/
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if (inFile == outFile) {
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outFile = NULL;
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}
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fd = (int) Tcl_GetFileInfo(inFile, NULL);
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Tcl_FreeFile(inFile);
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if (close(fd) < 0) {
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errorCode = errno;
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}
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}
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if (outFile != NULL) {
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fd = (int) Tcl_GetFileInfo(outFile, NULL);
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Tcl_FreeFile(outFile);
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if ((close(fd) < 0) && (errorCode == 0)) {
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errorCode = errno;
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}
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}
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return errorCode;
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}
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/*
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*----------------------------------------------------------------------
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*
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* FileSeekProc --
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*
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* This procedure is called by the generic IO level to move the
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* access point in a file based channel.
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*
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* Results:
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* -1 if failed, the new position if successful. An output
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* argument contains the POSIX error code if an error occurred,
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* or zero.
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*
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* Side effects:
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* Moves the location at which the channel will be accessed in
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* future operations.
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*
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*----------------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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FileSeekProc(instanceData, inFile, outFile, offset, mode, errorCodePtr)
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ClientData instanceData; /* Unused. */
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Tcl_File inFile, outFile; /* Input and output
|
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* files for channel. */
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long offset; /* Offset to seek to. */
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int mode; /* Relative to where
|
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* should we seek? Can be
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* one of SEEK_START,
|
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* SEEK_SET or SEEK_END. */
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int *errorCodePtr; /* To store error code. */
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{
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int newLoc;
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int fd;
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||
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*errorCodePtr = 0;
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if (inFile != (Tcl_File) NULL) {
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fd = (int) Tcl_GetFileInfo(inFile, NULL);
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} else if (outFile != (Tcl_File) NULL) {
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fd = (int) Tcl_GetFileInfo(outFile, NULL);
|
||
} else {
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*errorCodePtr = EFAULT;
|
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return -1;
|
||
}
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newLoc = lseek(fd, offset, mode);
|
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if (newLoc > -1) {
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return newLoc;
|
||
}
|
||
*errorCodePtr = errno;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
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* TclGetAndDetachPids --
|
||
*
|
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* This procedure is invoked in the generic implementation of a
|
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* background "exec" (An exec when invoked with a terminating "&")
|
||
* to store a list of the PIDs for processes in a command pipeline
|
||
* in interp->result and to detach the processes.
|
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*
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||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Modifies interp->result. Detaches processes.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
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TclGetAndDetachPids(interp, chan)
|
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Tcl_Interp *interp;
|
||
Tcl_Channel chan;
|
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{
|
||
PipeState *pipePtr;
|
||
Tcl_ChannelType *chanTypePtr;
|
||
int i;
|
||
char buf[20];
|
||
|
||
/*
|
||
* Punt if the channel is not a command channel.
|
||
*/
|
||
|
||
chanTypePtr = Tcl_GetChannelType(chan);
|
||
if (chanTypePtr != &pipeChannelType) {
|
||
return;
|
||
}
|
||
|
||
pipePtr = (PipeState *) Tcl_GetChannelInstanceData(chan);
|
||
for (i = 0; i < pipePtr->numPids; i++) {
|
||
sprintf(buf, "%d", pipePtr->pidPtr[i]);
|
||
Tcl_AppendElement(interp, buf);
|
||
Tcl_DetachPids(1, &(pipePtr->pidPtr[i]));
|
||
}
|
||
if (pipePtr->numPids > 0) {
|
||
ckfree((char *) pipePtr->pidPtr);
|
||
pipePtr->numPids = 0;
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PipeCloseProc --
|
||
*
|
||
* This procedure is invoked by the generic IO level to perform
|
||
* channel-type-specific cleanup when a command pipeline channel
|
||
* is closed.
|
||
*
|
||
* Results:
|
||
* 0 on success, errno otherwise.
|
||
*
|
||
* Side effects:
|
||
* Closes the command pipeline channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
PipeCloseProc(instanceData, interp, inFile, outFile)
|
||
ClientData instanceData; /* The pipe to close. */
|
||
Tcl_Interp *interp; /* For error reporting. */
|
||
Tcl_File inFile, outFile; /* Unused. */
|
||
{
|
||
PipeState *pipePtr;
|
||
Tcl_Channel errChan;
|
||
int fd, errorCode, result;
|
||
|
||
errorCode = 0;
|
||
pipePtr = (PipeState *) instanceData;
|
||
if (pipePtr->readFile != NULL) {
|
||
fd = (int) Tcl_GetFileInfo(pipePtr->readFile, NULL);
|
||
Tcl_FreeFile(pipePtr->readFile);
|
||
if (close(fd) < 0) {
|
||
errorCode = errno;
|
||
}
|
||
}
|
||
if (pipePtr->writeFile != NULL) {
|
||
fd = (int) Tcl_GetFileInfo(pipePtr->writeFile, NULL);
|
||
Tcl_FreeFile(pipePtr->writeFile);
|
||
if ((close(fd) < 0) && (errorCode == 0)) {
|
||
errorCode = errno;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Wrap the error file into a channel and give it to the cleanup
|
||
* routine.
|
||
*/
|
||
|
||
if (pipePtr->errorFile != NULL) {
|
||
errChan = Tcl_CreateChannel(&fileChannelType, "pipeError",
|
||
pipePtr->errorFile, NULL, NULL);
|
||
} else {
|
||
errChan = NULL;
|
||
}
|
||
result = TclCleanupChildren(interp, pipePtr->numPids, pipePtr->pidPtr,
|
||
errChan);
|
||
if (pipePtr->numPids != 0) {
|
||
ckfree((char *) pipePtr->pidPtr);
|
||
}
|
||
ckfree((char *) pipePtr);
|
||
if (errorCode == 0) {
|
||
return result;
|
||
}
|
||
return errorCode;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_OpenFileChannel --
|
||
*
|
||
* Open an file based channel on Unix systems.
|
||
*
|
||
* Results:
|
||
* The new channel or NULL. If NULL, the output argument
|
||
* errorCodePtr is set to a POSIX error and an error message is
|
||
* left in interp->result if interp is not NULL.
|
||
*
|
||
* Side effects:
|
||
* May open the channel and may cause creation of a file on the
|
||
* file system.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
Tcl_OpenFileChannel(interp, fileName, modeString, permissions)
|
||
Tcl_Interp *interp; /* Interpreter for error reporting;
|
||
* can be NULL. */
|
||
char *fileName; /* Name of file to open. */
|
||
char *modeString; /* A list of POSIX open modes or
|
||
* a string such as "rw". */
|
||
int permissions; /* If the open involves creating a
|
||
* file, with what modes to create
|
||
* it? */
|
||
{
|
||
int fd, seekFlag, mode, channelPermissions;
|
||
Tcl_File file;
|
||
Tcl_Channel chan;
|
||
char *nativeName, channelName[20];
|
||
Tcl_DString buffer;
|
||
|
||
mode = TclGetOpenMode(interp, modeString, &seekFlag);
|
||
if (mode == -1) {
|
||
return NULL;
|
||
}
|
||
switch (mode & (O_RDONLY | O_WRONLY | O_RDWR)) {
|
||
case O_RDONLY:
|
||
channelPermissions = TCL_READABLE;
|
||
break;
|
||
case O_WRONLY:
|
||
channelPermissions = TCL_WRITABLE;
|
||
break;
|
||
case O_RDWR:
|
||
channelPermissions = (TCL_READABLE | TCL_WRITABLE);
|
||
break;
|
||
default:
|
||
/*
|
||
* This may occurr if modeString was "", for example.
|
||
*/
|
||
panic("Tcl_OpenFileChannel: invalid mode value");
|
||
return NULL;
|
||
}
|
||
|
||
nativeName = Tcl_TranslateFileName(interp, fileName, &buffer);
|
||
if (nativeName == NULL) {
|
||
return NULL;
|
||
}
|
||
fd = open(nativeName, mode, permissions);
|
||
|
||
/*
|
||
* If nativeName is not NULL, the buffer is valid and we must free
|
||
* the storage.
|
||
*/
|
||
|
||
Tcl_DStringFree(&buffer);
|
||
|
||
if (fd < 0) {
|
||
if (interp != (Tcl_Interp *) NULL) {
|
||
Tcl_AppendResult(interp, "couldn't open \"", fileName, "\": ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
sprintf(channelName, "file%d", fd);
|
||
file = Tcl_GetFile((ClientData) fd, TCL_UNIX_FD);
|
||
|
||
chan = Tcl_CreateChannel(&fileChannelType, channelName,
|
||
(channelPermissions & TCL_READABLE) ? file : NULL,
|
||
(channelPermissions & TCL_WRITABLE) ? file : NULL,
|
||
(ClientData) NULL);
|
||
|
||
/*
|
||
* The channel may not be open now, for example if we tried to
|
||
* open a file with permissions that cannot be satisfied.
|
||
*/
|
||
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
if (interp != (Tcl_Interp *) NULL) {
|
||
Tcl_AppendResult(interp, "couldn't create channel \"",
|
||
channelName, "\": ", Tcl_PosixError(interp),
|
||
(char *) NULL);
|
||
}
|
||
Tcl_FreeFile(file);
|
||
close(fd);
|
||
return NULL;
|
||
}
|
||
|
||
if (seekFlag) {
|
||
if (Tcl_Seek(chan, 0, SEEK_END) < 0) {
|
||
if (interp != (Tcl_Interp *) NULL) {
|
||
Tcl_AppendResult(interp, "couldn't seek to end of file on \"",
|
||
channelName, "\": ", Tcl_PosixError(interp),
|
||
(char *) NULL);
|
||
}
|
||
Tcl_Close(NULL, chan);
|
||
return NULL;
|
||
}
|
||
}
|
||
return chan;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_MakeFileChannel --
|
||
*
|
||
* Makes a Tcl_Channel from an existing OS level file handle.
|
||
*
|
||
* Results:
|
||
* The Tcl_Channel created around the preexisting OS level file handle.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
Tcl_MakeFileChannel(inFd, outFd, mode)
|
||
ClientData inFd; /* OS level handle used for input. */
|
||
ClientData outFd; /* OS level handle used for output. */
|
||
int mode; /* ORed combination of TCL_READABLE and
|
||
* TCL_WRITABLE to indicate whether inFile
|
||
* and/or outFile are valid. */
|
||
{
|
||
Tcl_File inFile, outFile;
|
||
char channelName[20];
|
||
|
||
if (mode == 0) {
|
||
return (Tcl_Channel) NULL;
|
||
}
|
||
|
||
inFile = (Tcl_File) NULL;
|
||
outFile = (Tcl_File) NULL;
|
||
|
||
if (mode & TCL_READABLE) {
|
||
sprintf(channelName, "file%d", (int) inFd);
|
||
inFile = Tcl_GetFile(inFd, TCL_UNIX_FD);
|
||
}
|
||
|
||
if (mode & TCL_WRITABLE) {
|
||
sprintf(channelName, "file%d", (int) outFd);
|
||
outFile = Tcl_GetFile(outFd, TCL_UNIX_FD);
|
||
}
|
||
|
||
return Tcl_CreateChannel(&fileChannelType, channelName, inFile, outFile,
|
||
(ClientData) NULL);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclCreateCommandChannel --
|
||
*
|
||
* This function is called by the generic IO level to perform
|
||
* the platform specific channel initialization for a command
|
||
* channel.
|
||
*
|
||
* Results:
|
||
* Returns a new channel or NULL on failure.
|
||
*
|
||
* Side effects:
|
||
* Allocates a new channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
TclCreateCommandChannel(readFile, writeFile, errorFile, numPids, pidPtr)
|
||
Tcl_File readFile; /* If non-null, gives the file for reading. */
|
||
Tcl_File writeFile; /* If non-null, gives the file for writing. */
|
||
Tcl_File errorFile; /* If non-null, gives the file where errors
|
||
* can be read. */
|
||
int numPids; /* The number of pids in the pid array. */
|
||
int *pidPtr; /* An array of process identifiers.
|
||
* Allocated by the caller, freed when
|
||
* the channel is closed or the processes
|
||
* are detached (in a background exec). */
|
||
{
|
||
Tcl_Channel channel;
|
||
char channelName[20];
|
||
int channelId;
|
||
PipeState *statePtr = (PipeState *) ckalloc((unsigned) sizeof(PipeState));
|
||
|
||
statePtr->readFile = readFile;
|
||
statePtr->writeFile = writeFile;
|
||
statePtr->errorFile = errorFile;
|
||
statePtr->numPids = numPids;
|
||
statePtr->pidPtr = pidPtr;
|
||
|
||
/*
|
||
* Use one of the fds associated with the channel as the
|
||
* channel id.
|
||
*/
|
||
|
||
if (readFile) {
|
||
channelId = (int) Tcl_GetFileInfo(readFile, NULL);
|
||
} else if (writeFile) {
|
||
channelId = (int) Tcl_GetFileInfo(writeFile, NULL);
|
||
} else if (errorFile) {
|
||
channelId = (int) Tcl_GetFileInfo(errorFile, NULL);
|
||
} else {
|
||
channelId = 0;
|
||
}
|
||
|
||
/*
|
||
* For backward compatibility with previous versions of Tcl, we
|
||
* use "file%d" as the base name for pipes even though it would
|
||
* be more natural to use "pipe%d".
|
||
*/
|
||
|
||
sprintf(channelName, "file%d", channelId);
|
||
channel = Tcl_CreateChannel(&pipeChannelType, channelName, readFile,
|
||
writeFile, (ClientData) statePtr);
|
||
|
||
if (channel == NULL) {
|
||
|
||
/*
|
||
* pidPtr will be freed by the caller if the return value is NULL.
|
||
*/
|
||
|
||
ckfree((char *)statePtr);
|
||
}
|
||
return channel;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_PidCmd --
|
||
*
|
||
* This procedure is invoked to process the "pid" Tcl command.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
Tcl_PidCmd(dummy, interp, argc, argv)
|
||
ClientData dummy; /* Not used. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tcl_Channel chan; /* The channel to get pids for. */
|
||
Tcl_ChannelType *chanTypePtr; /* The type of that channel. */
|
||
PipeState *pipePtr; /* The pipe state. */
|
||
int i; /* Loops over PIDs attached to the
|
||
* pipe. */
|
||
char string[50]; /* Temp buffer for string rep. of
|
||
* PIDs attached to the pipe. */
|
||
|
||
if (argc > 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " ?channelId?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
if (argc == 1) {
|
||
sprintf(interp->result, "%ld", (long) getpid());
|
||
} else {
|
||
chan = Tcl_GetChannel(interp, argv[1], NULL);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
chanTypePtr = Tcl_GetChannelType(chan);
|
||
if (chanTypePtr != &pipeChannelType) {
|
||
return TCL_OK;
|
||
}
|
||
pipePtr = (PipeState *) Tcl_GetChannelInstanceData(chan);
|
||
for (i = 0; i < pipePtr->numPids; i++) {
|
||
sprintf(string, "%d", pipePtr->pidPtr[i]);
|
||
Tcl_AppendElement(interp, string);
|
||
}
|
||
}
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpBlockModeProc --
|
||
*
|
||
* This procedure is invoked by the generic IO level to set blocking
|
||
* and nonblocking mode on a TCP socket based channel.
|
||
*
|
||
* Results:
|
||
* 0 if successful, errno when failed.
|
||
*
|
||
* Side effects:
|
||
* Sets the device into blocking or nonblocking mode.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
TcpBlockModeProc(instanceData, inFile, outFile, mode)
|
||
ClientData instanceData; /* Socket state. */
|
||
Tcl_File inFile, outFile; /* Input, output files for channel. */
|
||
int mode; /* The mode to set. Can be one of
|
||
* TCL_MODE_BLOCKING or
|
||
* TCL_MODE_NONBLOCKING. */
|
||
{
|
||
TcpState *statePtr;
|
||
|
||
statePtr = (TcpState *) instanceData;
|
||
if (mode == TCL_MODE_BLOCKING) {
|
||
statePtr->flags &= (~(TCP_ASYNC_SOCKET));
|
||
} else {
|
||
statePtr->flags |= TCP_ASYNC_SOCKET;
|
||
}
|
||
return CommonBlockModeProc(instanceData, inFile, outFile, mode);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* WaitForConnect --
|
||
*
|
||
* Waits for a connection on an asynchronously opened socket to
|
||
* be completed.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The socket is connected after this function returns.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
WaitForConnect(statePtr, fileToWaitFor, errorCodePtr)
|
||
TcpState *statePtr; /* State of the socket. */
|
||
Tcl_File fileToWaitFor; /* File to wait on to become connected. */
|
||
int *errorCodePtr; /* Where to store errors? */
|
||
{
|
||
int sock; /* The socket itself. */
|
||
int timeOut; /* How long to wait. */
|
||
int state; /* Of calling TclWaitForFile. */
|
||
int flags; /* fcntl flags for the socket. */
|
||
|
||
/*
|
||
* If an asynchronous connect is in progress, attempt to wait for it
|
||
* to complete before reading.
|
||
*/
|
||
|
||
if (statePtr->flags & TCP_ASYNC_CONNECT) {
|
||
if (statePtr->flags & TCP_ASYNC_SOCKET) {
|
||
timeOut = 0;
|
||
} else {
|
||
timeOut = -1;
|
||
}
|
||
errno = 0;
|
||
state = TclWaitForFile(fileToWaitFor, TCL_WRITABLE | TCL_EXCEPTION,
|
||
timeOut);
|
||
if (!(statePtr->flags & TCP_ASYNC_SOCKET)) {
|
||
sock = (int) Tcl_GetFileInfo(statePtr->sock, NULL);
|
||
flags = fcntl(sock, F_GETFL);
|
||
flags &= (~(O_NONBLOCK));
|
||
(void) fcntl(sock, F_SETFL, flags);
|
||
}
|
||
if (state & TCL_EXCEPTION) {
|
||
return -1;
|
||
}
|
||
if (state & TCL_WRITABLE) {
|
||
statePtr->flags &= (~(TCP_ASYNC_CONNECT));
|
||
} else if (timeOut == 0) {
|
||
*errorCodePtr = errno = EWOULDBLOCK;
|
||
return -1;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpInputProc --
|
||
*
|
||
* This procedure is invoked by the generic IO level to read input
|
||
* from a TCP socket based channel.
|
||
*
|
||
* NOTE: We cannot share code with FilePipeInputProc because here
|
||
* we must use recv to obtain the input from the channel, not read.
|
||
*
|
||
* Results:
|
||
* The number of bytes read is returned or -1 on error. An output
|
||
* argument contains the POSIX error code on error, or zero if no
|
||
* error occurred.
|
||
*
|
||
* Side effects:
|
||
* Reads input from the input device of the channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
TcpInputProc(instanceData, inFile, buf, bufSize, errorCodePtr)
|
||
ClientData instanceData; /* Socket state. */
|
||
Tcl_File inFile; /* Input device for channel. */
|
||
char *buf; /* Where to store data read. */
|
||
int bufSize; /* How much space is available
|
||
* in the buffer? */
|
||
int *errorCodePtr; /* Where to store error code. */
|
||
{
|
||
TcpState *statePtr; /* The state of the socket. */
|
||
int sock; /* The OS handle. */
|
||
int bytesRead; /* How many bytes were read? */
|
||
int state; /* Of waiting for connection. */
|
||
|
||
*errorCodePtr = 0;
|
||
sock = (int) Tcl_GetFileInfo(inFile, NULL);
|
||
statePtr = (TcpState *) instanceData;
|
||
|
||
state = WaitForConnect(statePtr, inFile, errorCodePtr);
|
||
if (state != 0) {
|
||
return -1;
|
||
}
|
||
bytesRead = recv(sock, buf, bufSize, 0);
|
||
if (bytesRead > -1) {
|
||
return bytesRead;
|
||
}
|
||
if (errno == ECONNRESET) {
|
||
|
||
/*
|
||
* Turn ECONNRESET into a soft EOF condition.
|
||
*/
|
||
|
||
return 0;
|
||
}
|
||
*errorCodePtr = errno;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpOutputProc --
|
||
*
|
||
* This procedure is invoked by the generic IO level to write output
|
||
* to a TCP socket based channel.
|
||
*
|
||
* NOTE: We cannot share code with FilePipeOutputProc because here
|
||
* we must use send, not write, to get reliable error reporting.
|
||
*
|
||
* Results:
|
||
* The number of bytes written is returned. An output argument is
|
||
* set to a POSIX error code if an error occurred, or zero.
|
||
*
|
||
* Side effects:
|
||
* Writes output on the output device of the channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
TcpOutputProc(instanceData, outFile, buf, toWrite, errorCodePtr)
|
||
ClientData instanceData; /* Socket state. */
|
||
Tcl_File outFile; /* Output device for channel. */
|
||
char *buf; /* The data buffer. */
|
||
int toWrite; /* How many bytes to write? */
|
||
int *errorCodePtr; /* Where to store error code. */
|
||
{
|
||
TcpState *statePtr;
|
||
int written;
|
||
int sock; /* OS level socket. */
|
||
int state; /* Of waiting for connection. */
|
||
|
||
*errorCodePtr = 0;
|
||
sock = (int) Tcl_GetFileInfo(outFile, NULL);
|
||
statePtr = (TcpState *) instanceData;
|
||
state = WaitForConnect(statePtr, outFile, errorCodePtr);
|
||
if (state != 0) {
|
||
return -1;
|
||
}
|
||
written = send(sock, buf, toWrite, 0);
|
||
if (written > -1) {
|
||
return written;
|
||
}
|
||
*errorCodePtr = errno;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpCloseProc --
|
||
*
|
||
* This procedure is invoked by the generic IO level to perform
|
||
* channel-type-specific cleanup when a TCP socket based channel
|
||
* is closed.
|
||
*
|
||
* Results:
|
||
* 0 if successful, the value of errno if failed.
|
||
*
|
||
* Side effects:
|
||
* Closes the socket of the channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static int
|
||
TcpCloseProc(instanceData, interp, inFile, outFile)
|
||
ClientData instanceData; /* The socket to close. */
|
||
Tcl_Interp *interp; /* For error reporting - unused. */
|
||
Tcl_File inFile, outFile; /* Unused. */
|
||
{
|
||
TcpState *statePtr;
|
||
Tcl_File sockFile;
|
||
int sock;
|
||
int errorCode = 0;
|
||
|
||
statePtr = (TcpState *) instanceData;
|
||
sockFile = statePtr->sock;
|
||
sock = (int) Tcl_GetFileInfo(sockFile, NULL);
|
||
|
||
/*
|
||
* Delete a file handler that may be active for this socket if this
|
||
* is a server socket - the file handler was created automatically
|
||
* by Tcl as part of the mechanism to accept new client connections.
|
||
* Channel handlers are already deleted in the generic IO channel
|
||
* closing code that called this function, so we do not have to
|
||
* delete them here.
|
||
*/
|
||
|
||
Tcl_DeleteFileHandler(sockFile);
|
||
|
||
ckfree((char *) statePtr);
|
||
|
||
/*
|
||
* We assume that inFile==outFile==sockFile and so
|
||
* we only clean up sockFile.
|
||
*/
|
||
|
||
Tcl_FreeFile(sockFile);
|
||
|
||
if (close(sock) < 0) {
|
||
errorCode = errno;
|
||
}
|
||
|
||
return errorCode;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpGetOptionProc --
|
||
*
|
||
* Computes an option value for a TCP socket based channel, or a
|
||
* list of all options and their values.
|
||
*
|
||
* Note: This code is based on code contributed by John Haxby.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result. The value of the specified option or a
|
||
* list of all options and their values is returned in the
|
||
* supplied DString.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
TcpGetOptionProc(instanceData, optionName, dsPtr)
|
||
ClientData instanceData; /* Socket state. */
|
||
char *optionName; /* Name of the option to
|
||
* retrieve the value for, or
|
||
* NULL to get all options and
|
||
* their values. */
|
||
Tcl_DString *dsPtr; /* Where to store the computed
|
||
* value; initialized by caller. */
|
||
{
|
||
TcpState *statePtr;
|
||
struct sockaddr_in sockname;
|
||
struct sockaddr_in peername;
|
||
struct hostent *hostEntPtr;
|
||
int sock;
|
||
int size = sizeof(struct sockaddr_in);
|
||
size_t len = 0;
|
||
char buf[128];
|
||
|
||
statePtr = (TcpState *) instanceData;
|
||
sock = (int) Tcl_GetFileInfo(statePtr->sock, NULL);
|
||
if (optionName != (char *) NULL) {
|
||
len = strlen(optionName);
|
||
}
|
||
|
||
if ((len == 0) ||
|
||
((len > 1) && (optionName[1] == 'p') &&
|
||
(strncmp(optionName, "-peername", len) == 0))) {
|
||
if (getpeername(sock, (struct sockaddr *) &peername, &size) >= 0) {
|
||
if (len == 0) {
|
||
Tcl_DStringAppendElement(dsPtr, "-peername");
|
||
Tcl_DStringStartSublist(dsPtr);
|
||
}
|
||
Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
|
||
hostEntPtr = gethostbyaddr((char *) &(peername.sin_addr),
|
||
sizeof(peername.sin_addr), AF_INET);
|
||
if (hostEntPtr != (struct hostent *) NULL) {
|
||
Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name);
|
||
} else {
|
||
Tcl_DStringAppendElement(dsPtr, inet_ntoa(peername.sin_addr));
|
||
}
|
||
sprintf(buf, "%d", ntohs(peername.sin_port));
|
||
Tcl_DStringAppendElement(dsPtr, buf);
|
||
if (len == 0) {
|
||
Tcl_DStringEndSublist(dsPtr);
|
||
} else {
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
}
|
||
|
||
if ((len == 0) ||
|
||
((len > 1) && (optionName[1] == 's') &&
|
||
(strncmp(optionName, "-sockname", len) == 0))) {
|
||
if (getsockname(sock, (struct sockaddr *) &sockname, &size) >= 0) {
|
||
if (len == 0) {
|
||
Tcl_DStringAppendElement(dsPtr, "-sockname");
|
||
Tcl_DStringStartSublist(dsPtr);
|
||
}
|
||
Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
|
||
hostEntPtr = gethostbyaddr((char *) &(sockname.sin_addr),
|
||
sizeof(peername.sin_addr), AF_INET);
|
||
if (hostEntPtr != (struct hostent *) NULL) {
|
||
Tcl_DStringAppendElement(dsPtr, hostEntPtr->h_name);
|
||
} else {
|
||
Tcl_DStringAppendElement(dsPtr, inet_ntoa(sockname.sin_addr));
|
||
}
|
||
sprintf(buf, "%d", ntohs(sockname.sin_port));
|
||
Tcl_DStringAppendElement(dsPtr, buf);
|
||
if (len == 0) {
|
||
Tcl_DStringEndSublist(dsPtr);
|
||
} else {
|
||
return TCL_OK;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (len > 0) {
|
||
Tcl_SetErrno(EINVAL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* CreateSocket --
|
||
*
|
||
* This function opens a new socket in client or server mode
|
||
* and initializes the TcpState structure.
|
||
*
|
||
* Results:
|
||
* Returns a new TcpState, or NULL with an error in interp->result,
|
||
* if interp is not NULL.
|
||
*
|
||
* Side effects:
|
||
* Opens a socket.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static TcpState *
|
||
CreateSocket(interp, port, host, server, myaddr, myport, async)
|
||
Tcl_Interp *interp; /* For error reporting; can be NULL. */
|
||
int port; /* Port number to open. */
|
||
char *host; /* Name of host on which to open port.
|
||
* NULL implies INADDR_ANY */
|
||
int server; /* 1 if socket should be a server socket,
|
||
* else 0 for a client socket. */
|
||
char *myaddr; /* Optional client-side address */
|
||
int myport; /* Optional client-side port */
|
||
int async; /* If nonzero and creating a client socket,
|
||
* attempt to do an async connect. Otherwise
|
||
* do a synchronous connect or bind. */
|
||
{
|
||
int status, sock, asyncConnect, curState, origState;
|
||
struct sockaddr_in sockaddr; /* socket address */
|
||
struct sockaddr_in mysockaddr; /* Socket address for client */
|
||
TcpState *statePtr;
|
||
|
||
sock = -1;
|
||
origState = 0;
|
||
if (! CreateSocketAddress(&sockaddr, host, port)) {
|
||
goto addressError;
|
||
}
|
||
if ((myaddr != NULL || myport != 0) &&
|
||
! CreateSocketAddress(&mysockaddr, myaddr, myport)) {
|
||
goto addressError;
|
||
}
|
||
|
||
sock = socket(AF_INET, SOCK_STREAM, 0);
|
||
if (sock < 0) {
|
||
goto addressError;
|
||
}
|
||
|
||
/*
|
||
* Set kernel space buffering
|
||
*/
|
||
|
||
TclSockMinimumBuffers(sock, SOCKET_BUFSIZE);
|
||
|
||
asyncConnect = 0;
|
||
status = 0;
|
||
if (server) {
|
||
|
||
/*
|
||
* Set up to reuse server addresses automatically and bind to the
|
||
* specified port.
|
||
*/
|
||
|
||
status = 1;
|
||
(void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &status,
|
||
sizeof(status));
|
||
status = bind(sock, (struct sockaddr *) &sockaddr,
|
||
sizeof(struct sockaddr));
|
||
if (status != -1) {
|
||
status = listen(sock, 5);
|
||
}
|
||
} else {
|
||
if (myaddr != NULL || myport != 0) {
|
||
status = 1;
|
||
(void) setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &status,
|
||
sizeof(status));
|
||
status = bind(sock, (struct sockaddr *) &mysockaddr,
|
||
sizeof(struct sockaddr));
|
||
if (status < 0) {
|
||
goto bindError;
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Attempt to connect. The connect may fail at present with an
|
||
* EINPROGRESS but at a later time it will complete. The caller
|
||
* will set up a file handler on the socket if she is interested in
|
||
* being informed when the connect completes.
|
||
*/
|
||
|
||
if (async) {
|
||
origState = fcntl(sock, F_GETFL);
|
||
curState = origState | O_NONBLOCK;
|
||
status = fcntl(sock, F_SETFL, curState);
|
||
} else {
|
||
status = 0;
|
||
}
|
||
if (status > -1) {
|
||
status = connect(sock, (struct sockaddr *) &sockaddr,
|
||
sizeof(sockaddr));
|
||
if (status < 0) {
|
||
if (errno == EINPROGRESS) {
|
||
asyncConnect = 1;
|
||
status = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
bindError:
|
||
if (status < 0) {
|
||
if (interp != NULL) {
|
||
Tcl_AppendResult(interp, "couldn't open socket: ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
}
|
||
if (sock != -1) {
|
||
close(sock);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
* Allocate a new TcpState for this socket.
|
||
*/
|
||
|
||
statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
|
||
statePtr->flags = 0;
|
||
if (asyncConnect) {
|
||
statePtr->flags = TCP_ASYNC_CONNECT;
|
||
}
|
||
statePtr->sock = Tcl_GetFile((ClientData) sock, TCL_UNIX_FD);
|
||
|
||
return statePtr;
|
||
|
||
addressError:
|
||
if (sock != -1) {
|
||
close(sock);
|
||
}
|
||
if (interp != NULL) {
|
||
Tcl_AppendResult(interp, "couldn't open socket: ",
|
||
Tcl_PosixError(interp), (char *) NULL);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* CreateSocketAddress --
|
||
*
|
||
* This function initializes a sockaddr structure for a host and port.
|
||
*
|
||
* Results:
|
||
* 1 if the host was valid, 0 if the host could not be converted to
|
||
* an IP address.
|
||
*
|
||
* Side effects:
|
||
* Fills in the *sockaddrPtr structure.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
CreateSocketAddress(sockaddrPtr, host, port)
|
||
struct sockaddr_in *sockaddrPtr; /* Socket address */
|
||
char *host; /* Host. NULL implies INADDR_ANY */
|
||
int port; /* Port number */
|
||
{
|
||
struct hostent *hostent; /* Host database entry */
|
||
struct in_addr addr; /* For 64/32 bit madness */
|
||
|
||
(void) memset((VOID *) sockaddrPtr, '\0', sizeof(struct sockaddr_in));
|
||
sockaddrPtr->sin_family = AF_INET;
|
||
sockaddrPtr->sin_port = htons((unsigned short) (port & 0xFFFF));
|
||
if (host == NULL) {
|
||
addr.s_addr = INADDR_ANY;
|
||
} else {
|
||
addr.s_addr = inet_addr(host);
|
||
if (addr.s_addr == (unsigned long) -1) {
|
||
hostent = gethostbyname(host);
|
||
if (hostent != NULL) {
|
||
memcpy((VOID *) &addr,
|
||
(VOID *) hostent->h_addr_list[0],
|
||
(size_t) hostent->h_length);
|
||
} else {
|
||
#ifdef EHOSTUNREACH
|
||
errno = EHOSTUNREACH;
|
||
#else
|
||
#ifdef ENXIO
|
||
errno = ENXIO;
|
||
#endif
|
||
#endif
|
||
return 0; /* error */
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* NOTE: On 64 bit machines the assignment below is rumored to not
|
||
* do the right thing. Please report errors related to this if you
|
||
* observe incorrect behavior on 64 bit machines such as DEC Alphas.
|
||
* Should we modify this code to do an explicit memcpy?
|
||
*/
|
||
|
||
sockaddrPtr->sin_addr.s_addr = addr.s_addr;
|
||
return 1; /* Success. */
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_OpenTcpClient --
|
||
*
|
||
* Opens a TCP client socket and creates a channel around it.
|
||
*
|
||
* Results:
|
||
* The channel or NULL if failed. An error message is returned
|
||
* in the interpreter on failure.
|
||
*
|
||
* Side effects:
|
||
* Opens a client socket and creates a new channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
Tcl_OpenTcpClient(interp, port, host, myaddr, myport, async)
|
||
Tcl_Interp *interp; /* For error reporting; can be NULL. */
|
||
int port; /* Port number to open. */
|
||
char *host; /* Host on which to open port. */
|
||
char *myaddr; /* Client-side address */
|
||
int myport; /* Client-side port */
|
||
int async; /* If nonzero, attempt to do an
|
||
* asynchronous connect. Otherwise
|
||
* we do a blocking connect. */
|
||
{
|
||
Tcl_Channel chan;
|
||
TcpState *statePtr;
|
||
char channelName[20];
|
||
|
||
/*
|
||
* Create a new client socket and wrap it in a channel.
|
||
*/
|
||
|
||
statePtr = CreateSocket(interp, port, host, 0, myaddr, myport, async);
|
||
if (statePtr == NULL) {
|
||
return NULL;
|
||
}
|
||
|
||
statePtr->acceptProc = NULL;
|
||
statePtr->acceptProcData = (ClientData) NULL;
|
||
|
||
sprintf(channelName, "sock%d",
|
||
(int) Tcl_GetFileInfo(statePtr->sock, NULL));
|
||
|
||
chan = Tcl_CreateChannel(&tcpChannelType, channelName, statePtr->sock,
|
||
statePtr->sock, (ClientData) statePtr);
|
||
if (Tcl_SetChannelOption(interp, chan, "-translation", "auto crlf") ==
|
||
TCL_ERROR) {
|
||
Tcl_Close((Tcl_Interp *) NULL, chan);
|
||
return NULL;
|
||
}
|
||
return chan;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_MakeTcpClientChannel --
|
||
*
|
||
* Creates a Tcl_Channel from an existing client TCP socket.
|
||
*
|
||
* Results:
|
||
* The Tcl_Channel wrapped around the preexisting TCP socket.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
Tcl_MakeTcpClientChannel(sock)
|
||
ClientData sock; /* The socket to wrap up into a channel. */
|
||
{
|
||
TcpState *statePtr;
|
||
Tcl_File sockFile;
|
||
char channelName[20];
|
||
Tcl_Channel chan;
|
||
|
||
sockFile = Tcl_GetFile(sock, TCL_UNIX_FD);
|
||
statePtr = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
|
||
statePtr->sock = sockFile;
|
||
statePtr->acceptProc = NULL;
|
||
statePtr->acceptProcData = (ClientData) NULL;
|
||
|
||
sprintf(channelName, "sock%d", (int) sock);
|
||
|
||
chan = Tcl_CreateChannel(&tcpChannelType, channelName, sockFile, sockFile,
|
||
(ClientData) statePtr);
|
||
if (Tcl_SetChannelOption((Tcl_Interp *) NULL, chan, "-translation",
|
||
"auto crlf") == TCL_ERROR) {
|
||
Tcl_Close((Tcl_Interp *) NULL, chan);
|
||
return NULL;
|
||
}
|
||
return chan;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_OpenTcpServer --
|
||
*
|
||
* Opens a TCP server socket and creates a channel around it.
|
||
*
|
||
* Results:
|
||
* The channel or NULL if failed. If an error occurred, an
|
||
* error message is left in interp->result if interp is
|
||
* not NULL.
|
||
*
|
||
* Side effects:
|
||
* Opens a server socket and creates a new channel.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
Tcl_OpenTcpServer(interp, port, myHost, acceptProc, acceptProcData)
|
||
Tcl_Interp *interp; /* For error reporting - may be
|
||
* NULL. */
|
||
int port; /* Port number to open. */
|
||
char *myHost; /* Name of local host. */
|
||
Tcl_TcpAcceptProc *acceptProc; /* Callback for accepting connections
|
||
* from new clients. */
|
||
ClientData acceptProcData; /* Data for the callback. */
|
||
{
|
||
Tcl_Channel chan;
|
||
TcpState *statePtr;
|
||
char channelName[20];
|
||
|
||
/*
|
||
* Create a new client socket and wrap it in a channel.
|
||
*/
|
||
|
||
statePtr = CreateSocket(interp, port, myHost, 1, NULL, 0, 0);
|
||
if (statePtr == NULL) {
|
||
return NULL;
|
||
}
|
||
|
||
statePtr->acceptProc = acceptProc;
|
||
statePtr->acceptProcData = acceptProcData;
|
||
|
||
/*
|
||
* Set up the callback mechanism for accepting connections
|
||
* from new clients.
|
||
*/
|
||
|
||
Tcl_CreateFileHandler(statePtr->sock, TCL_READABLE, TcpAccept,
|
||
(ClientData) statePtr);
|
||
sprintf(channelName, "sock%d",
|
||
(int) Tcl_GetFileInfo(statePtr->sock, NULL));
|
||
chan = Tcl_CreateChannel(&tcpChannelType, channelName, NULL, NULL,
|
||
(ClientData) statePtr);
|
||
return chan;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TcpAccept --
|
||
* Accept a TCP socket connection. This is called by the event loop.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Creates a new connection socket. Calls the registered callback
|
||
* for the connection acceptance mechanism.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
TcpAccept(data, mask)
|
||
ClientData data; /* Callback token. */
|
||
int mask; /* Not used. */
|
||
{
|
||
TcpState *sockState; /* Client data of server socket. */
|
||
int newsock; /* The new client socket */
|
||
Tcl_File newFile; /* Its file. */
|
||
TcpState *newSockState; /* State for new socket. */
|
||
struct sockaddr_in addr; /* The remote address */
|
||
int len; /* For accept interface */
|
||
Tcl_Channel chan; /* Channel instance created. */
|
||
char channelName[20];
|
||
|
||
sockState = (TcpState *) data;
|
||
|
||
len = sizeof(struct sockaddr_in);
|
||
newsock = accept((int) Tcl_GetFileInfo(sockState->sock, NULL),
|
||
(struct sockaddr *)&addr, &len);
|
||
if (newsock < 0) {
|
||
return;
|
||
}
|
||
|
||
newFile = Tcl_GetFile((ClientData) newsock, TCL_UNIX_FD);
|
||
if (newFile) {
|
||
newSockState = (TcpState *) ckalloc((unsigned) sizeof(TcpState));
|
||
|
||
newSockState->flags = 0;
|
||
newSockState->sock = newFile;
|
||
newSockState->acceptProc = (Tcl_TcpAcceptProc *) NULL;
|
||
newSockState->acceptProcData = (ClientData) NULL;
|
||
|
||
sprintf(channelName, "sock%d", (int) newsock);
|
||
chan = Tcl_CreateChannel(&tcpChannelType, channelName, newFile,
|
||
newFile, (ClientData) newSockState);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
ckfree((char *) newSockState);
|
||
close(newsock);
|
||
Tcl_FreeFile(newFile);
|
||
} else {
|
||
if (Tcl_SetChannelOption((Tcl_Interp *) NULL, chan, "-translation",
|
||
"auto crlf") == TCL_ERROR) {
|
||
Tcl_Close((Tcl_Interp *) NULL, chan);
|
||
}
|
||
if (sockState->acceptProc != (Tcl_TcpAcceptProc *) NULL) {
|
||
(sockState->acceptProc) (sockState->acceptProcData, chan,
|
||
inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclGetDefaultStdChannel --
|
||
*
|
||
* Creates channels for standard input, standard output or standard
|
||
* error output if they do not already exist.
|
||
*
|
||
* Results:
|
||
* Returns the specified default standard channel, or NULL.
|
||
*
|
||
* Side effects:
|
||
* May cause the creation of a standard channel and the underlying
|
||
* file.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
Tcl_Channel
|
||
TclGetDefaultStdChannel(type)
|
||
int type; /* One of TCL_STDIN, TCL_STDOUT, TCL_STDERR. */
|
||
{
|
||
Tcl_Channel channel = NULL;
|
||
int fd = 0; /* Initializations needed to prevent */
|
||
int mode = 0; /* compiler warning (used before set). */
|
||
char *bufMode = NULL;
|
||
|
||
/*
|
||
* If the channels were not created yet, create them now and
|
||
* store them in the static variables.
|
||
*/
|
||
|
||
switch (type) {
|
||
case TCL_STDIN:
|
||
fd = 0;
|
||
mode = TCL_READABLE;
|
||
bufMode = "line";
|
||
break;
|
||
case TCL_STDOUT:
|
||
fd = 1;
|
||
mode = TCL_WRITABLE;
|
||
bufMode = "line";
|
||
break;
|
||
case TCL_STDERR:
|
||
fd = 2;
|
||
mode = TCL_WRITABLE;
|
||
bufMode = "none";
|
||
break;
|
||
default:
|
||
panic("TclGetDefaultStdChannel: Unexpected channel type");
|
||
break;
|
||
}
|
||
|
||
channel = Tcl_MakeFileChannel((ClientData) fd, (ClientData) fd, mode);
|
||
|
||
/*
|
||
* Set up the normal channel options for stdio handles.
|
||
*/
|
||
|
||
if (Tcl_SetChannelOption(NULL, channel, "-translation", "auto") ==
|
||
TCL_ERROR) {
|
||
Tcl_Close((Tcl_Interp *) NULL, channel);
|
||
return NULL;
|
||
}
|
||
if (Tcl_SetChannelOption(NULL, channel, "-buffering", bufMode) ==
|
||
TCL_ERROR) {
|
||
Tcl_Close((Tcl_Interp *) NULL, channel);
|
||
return NULL;
|
||
}
|
||
return channel;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* TclClosePipeFile --
|
||
*
|
||
* This function is a simple wrapper for close on a file or
|
||
* pipe handle. Called in the generic command pipeline cleanup
|
||
* code to do platform specific closing of the files associated
|
||
* with the command channel.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Closes the fd and frees the Tcl_File.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
void
|
||
TclClosePipeFile(file)
|
||
Tcl_File file;
|
||
{
|
||
int fd = (int) Tcl_GetFileInfo(file, NULL);
|
||
close(fd);
|
||
Tcl_FreeFile(file);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* Tcl_GetOpenFile --
|
||
*
|
||
* Given a name of a channel registered in the given interpreter,
|
||
* returns a FILE * for it.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result. If the channel is registered in the given
|
||
* interpreter and it is managed by the "file" channel driver, and
|
||
* it is open for the requested mode, then the output parameter
|
||
* filePtr is set to a FILE * for the underlying file. On error, the
|
||
* filePtr is not set, TCL_ERROR is returned and an error message is
|
||
* left in interp->result.
|
||
*
|
||
* Side effects:
|
||
* May invoke fdopen to create the FILE * for the requested file.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tcl_GetOpenFile(interp, string, forWriting, checkUsage, filePtr)
|
||
Tcl_Interp *interp; /* Interpreter in which to find file. */
|
||
char *string; /* String that identifies file. */
|
||
int forWriting; /* 1 means the file is going to be used
|
||
* for writing, 0 means for reading. */
|
||
int checkUsage; /* 1 means verify that the file was opened
|
||
* in a mode that allows the access specified
|
||
* by "forWriting". Ignored, we always
|
||
* check that the channel is open for the
|
||
* requested mode. */
|
||
ClientData *filePtr; /* Store pointer to FILE structure here. */
|
||
{
|
||
Tcl_Channel chan;
|
||
int chanMode;
|
||
Tcl_ChannelType *chanTypePtr;
|
||
Tcl_File tf;
|
||
int fd;
|
||
FILE *f;
|
||
|
||
chan = Tcl_GetChannel(interp, string, &chanMode);
|
||
if (chan == (Tcl_Channel) NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
if ((forWriting) && ((chanMode & TCL_WRITABLE) == 0)) {
|
||
Tcl_AppendResult(interp,
|
||
"\"", string, "\" wasn't opened for writing", (char *) NULL);
|
||
return TCL_ERROR;
|
||
} else if ((!(forWriting)) && ((chanMode & TCL_READABLE) == 0)) {
|
||
Tcl_AppendResult(interp,
|
||
"\"", string, "\" wasn't opened for reading", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* We allow creating a FILE * out of file based, pipe based and socket
|
||
* based channels. We currently do not allow any other channel types,
|
||
* because it is likely that stdio will not know what to do with them.
|
||
*/
|
||
|
||
chanTypePtr = Tcl_GetChannelType(chan);
|
||
if ((chanTypePtr == &fileChannelType) || (chanTypePtr == &pipeChannelType)
|
||
|| (chanTypePtr == &tcpChannelType)) {
|
||
tf = Tcl_GetChannelFile(chan,
|
||
(forWriting ? TCL_WRITABLE : TCL_READABLE));
|
||
fd = (int) Tcl_GetFileInfo(tf, NULL);
|
||
|
||
/*
|
||
* The call to fdopen below is probably dangerous, since it will
|
||
* truncate an existing file if the file is being opened
|
||
* for writing....
|
||
*/
|
||
|
||
f = fdopen(fd, (forWriting ? "w" : "r"));
|
||
if (f == NULL) {
|
||
Tcl_AppendResult(interp, "cannot get a FILE * for \"", string,
|
||
"\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
*filePtr = (ClientData) f;
|
||
return TCL_OK;
|
||
}
|
||
|
||
Tcl_AppendResult(interp, "\"", string,
|
||
"\" cannot be used to get a FILE * - unsupported type",
|
||
(char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|