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[Emacs-diffs] Changes to src/hftctl.c
|
From: |
Dan Nicolaescu |
|
Subject: |
[Emacs-diffs] Changes to src/hftctl.c |
|
Date: |
Wed, 12 Nov 2008 07:17:34 +0000 |
CVSROOT: /cvsroot/emacs
Module name: emacs
Changes by: Dan Nicolaescu <dann> 08/11/12 07:17:27
Index: src/hftctl.c
===================================================================
RCS file: src/hftctl.c
diff -N src/hftctl.c
--- src/hftctl.c 1 Sep 2003 15:45:52 -0000 1.13
+++ /dev/null 1 Jan 1970 00:00:00 -0000
@@ -1,342 +0,0 @@
-/* IBM has disclaimed copyright on this module. */
-
-/***************************************************************/
-/* */
-/* Function: hftctl */
-/* */
-/* Syntax: */
-/* #include <sys/ioctl.h> */
-/* #include <sys/hft.h> */
-/* */
-/* int hftctl(fildes, request, arg ) */
-/* int fildes, request; */
-/* char *arg; */
-/* */
-/* Description: */
-/* */
-/* Does the following: */
-/* 1. determines if fildes is pty */
-/* does normal ioctl it is not */
-/* 2. places fildes into raw mode */
-/* 3. converts ioctl arguments to datastream */
-/* 4. waits for 2 secs for acknowledgement before */
-/* timing out. */
-/* 5. places response in callers buffer ( just like */
-/* ioctl. */
-/* 6. returns fildes to its original mode */
-/* */
-/* User of this program should review steps 1,4, and 3. */
-/* hftctl makes no check on the request type. It must be */
-/* a HFT ioctl that is supported remotely. */
-/* This program will use the SIGALRM and alarm(2). Any */
-/* Previous alarms are lost. */
-/* */
-/* Users of this program are free to modify it any way */
-/* they want. */
-/* */
-/* Return Value: */
-/* */
-/* If ioctl fails, a value of -1 is returned and errno */
-/* is set to indicate the error. */
-/* */
-/***************************************************************/
-
-#include <config.h>
-#include <sys/signal.h>
-#include <errno.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <setjmp.h>
-#include <sys/ioctl.h>
-#include <sys/devinfo.h>
-#include <termios.h>
-#include <termio.h>
-#include <sys/hft.h>
-#include <sys/uio.h>
-#include <sys/tty.h>
-/* #include <sys/pty.h> */
-
-#define REMOTE 0x01
-
-#undef ioctl
-static char SCCSid[] = "com/gnuemacs/src,3.1,9021-90/05/03-5/3/90";
-
-/*************** LOCAL DEFINES **********************************/
-
-#define QDEV ((HFQPDEVCH<<8)|HFQPDEVCL)
-#define QLOC ((HFQLOCCH<<8)|HFQLOCCL)
-#define QPS ((HFQPRESCH<<8)|HFQPRESCL)
-
-#ifndef TCGETS
-#define TCGETS TCGETA
-#endif
-#ifndef TCSETS
-#define TCSETS TCSETA
-#endif
-
-/*************** EXTERNAL / GLOBAL DATA AREA ********************/
-
-static int hfqry();
-static int hfskbd();
- char *xmalloc();
-
-extern int errno;
-static jmp_buf hftenv;
-static int is_ack_vtd;
-static SIGTYPE (*sav_alrm) ();
-static struct hfctlreq req =
- { 0x1b,'[','x',0,0,0,21,HFCTLREQCH,HFCTLREQCL};
-static struct hfctlack ACK =
- { 0x1b,'[','x',0,0,0,21,HFCTLACKCH,HFCTLACKCL};
-
- /* FUNC signal(); */
-
-/*************** LOCAL MACROS ***********************************/
-
-#define HFTYPE(p) ((p->hf_typehi<<8)|(p->hf_typelo))
-
-#define BYTE4(p) ((p)[0]<<24 | (p)[1]<<16 | (p)[2]<<8 | (p)[3])
-
- /* read a buffer */
-#define RD_BUF(f,p,l) \
- while ((l)) \
- if ((j = emacs_read (f, p, l)) < 0) \
- if (errno != EINTR) return (-1); \
- else continue; \
- else { (l) -= j; (p) += j; }
-
-/*************** function prototypes ***************************/
-#ifdef PROTOTYPES
-static GT_ACK (int fd, int req, char *buf);
-static WR_REQ (int fd, int request, int cmdlen, char *cmd, int resplen);
-static void hft_alrm(int sig);
-#else
-static GT_ACK ();
-static WR_REQ ();
-static void hft_alrm ();
-#endif
-
-/*************** HFTCTL FUNCTION *******************************/
-
-hftctl (fd, request, arg)
- int fd;
- int request;
- union {
- struct hfintro *intro;
- struct hfquery *query;
- char *c;
- } arg;
-{
-
- int i;
- int fd_flag; /* fcntl flags */
- register union {
- struct hfintro *cmd; /* p.cmd - intro des. */
- struct hfqphdevc *ph; /* p.ph - physical dev.*/
- char *c; /* p.c - char ptr */
- } p; /* general pointer */
- int pty_new; /* pty modes */
- int pty_old;
- int retcode;
- struct termios term_new; /* terminal attributes */
- struct termios term_old;
- struct devinfo devInfo; /* defined in sys/devinfo.h */
-
-
- if (ioctl (fd, IOCINFO, &devInfo) == -1) return(-1);
-
- if (devInfo.devtype != DD_PSEU) /* is it a pty? */
- return (ioctl(fd, request, arg)); /* no, do IOCTL */
-
- /******* START PTY **************/
- /** Pty found, possible HFT */
- /** set new file des as raw */
- /** as you can. */
- /********************************/
-
- /* Get current state of file */
- /* descriptor & save */
- if ((fd_flag = fcntl (fd, F_GETFL, 0)) == -1) return (-1);
- if (ioctl (fd, TCGETS, &term_old) == -1) return (-1);
- /* set terminal attr to raw */
- /* and to delay on read */
- pty_new = pty_old | REMOTE;
- memcpy (&term_new, &term_old, sizeof (term_new));
- term_new.c_iflag = 0;
- term_new.c_oflag = 0;
- term_new.c_lflag = 0;
- /* term_new.c_line = 0; */
- for (i = 1; i <= 5; i++)
- term_new.c_cc[i] = 0;
- term_new.c_cc[0] = -1;
- ioctl (fd, TCSETS, &term_new);
- if (fcntl (fd, F_SETFL, fd_flag & ~O_NDELAY) == -1)
- return(-1);
- /* call spacific function */
- if (request == HFSKBD)
- retcode = hfskbd (fd, request, arg.c);
- else /* assume HFQUERY */
- retcode = hfqry (fd, request, arg.c);
-
- fcntl (fd, F_SETFL, fd_flag); /* reset terminal to original */
- ioctl (fd, TCSETS, &term_old);
-
-
- return (retcode); /* return error */
-}
-
-/*************** HFSKBD FUNCTION ******************************/
-static int
-hfskbd (fd, request, arg)
- int fd;
- int request;
- struct hfbuf *arg;
-{
- WR_REQ(fd, request, arg->hf_buflen, arg->hf_bufp,0);
- return (GT_ACK(fd, request, arg->hf_bufp));
-}
-
-/*************** HFQUERY FUNCTION ******************************/
-static int
-hfqry (fd, request, arg)
- int fd;
- int request;
- struct hfquery *arg;
-{
- WR_REQ(fd, request, arg->hf_cmdlen, arg->hf_cmd, arg->hf_resplen);
- return (GT_ACK(fd, request, arg->hf_resp));
-}
-
-
-/*************** GT_ACK FUNCTION ******************************/
-static int
-GT_ACK (fd, req, buf)
- int fd;
- int req;
- char *buf;
-{
- struct hfctlack ack;
- int i = sizeof (ack);
- int j = 0;
- union {
- char *c;
- struct hfctlack *ack;
- } p;
-
- is_ack_vtd = 0; /* flag no ACT VTD yet */
-
- if (setjmp (hftenv)) /* set environment in case */
- { /* of time out */
- errno = ENODEV; /* if time out, set errno */
- return (-1); /* flag error */
- }
-
- alarm(3); /* time out in 3 secs */
- sav_alrm = signal (SIGALRM, hft_alrm); /* prepare to catch time out */
-
- p.ack = &ack;
- while (! is_ack_vtd) /* do until valid ACK VTD */
- {
- RD_BUF(fd, p.c, i); /* read until a ACK VTD is fill*/
-
- if (! memcmp (&ack, &ACK, sizeof (HFINTROSZ)) /* the ACK intro & */
- && (ack.hf_request == req)) /* is it the response we want ?*/
- { /* yes, ACK VTD found */
- is_ack_vtd = 1; /* quickly, flag it */
- break; /* get the %$%#@ out of here */
- }
-
- p.ack = &ack; /* no, then skip 1st */
- ++p.c; /* char and start over */
- i = sizeof (ack) - 1; /* one less ESC to cry over */
-
- while ((*p.c != 0x1b) && i) /* scan for next ESC */
- { ++p.c; --i; } /* if any */
-
- (i ? memcpy (&ack, p.c, i) : 0); /* if any left over, then move */
- p.ack = &ack; /* ESC to front of ack struct */
- p.c += i; /* skip over whats been read */
- i = sizeof (ack) - i; /* set whats left to be read */
- } /***** TRY AGAIN */
-
- alarm(0); /* ACK VTD received, reset alrm*/
- signal (SIGALRM, sav_alrm); /* reset signal */
-
- if (i = ack.hf_arg_len) /* any data following ? */
- { /* yes, */
- RD_BUF(fd,buf,i); /* read until it is received */
- }
-
- if (errno = ack.hf_retcode) /* set errno based on returned */
- return (-1); /* code, if 0, then no error */
- else
- return (0); /* if set, then error returned */
-}
-
-/*************** HFT_ALRM FUNCTION ******************************/
-static void
-hft_alrm (sig) /* Function hft_alrm - handle */
- int sig; /* alarm signal */
-{
- signal (SIGALRM, sav_alrm); /* reset to previous */
-
- if (is_ack_vtd) /* has ack vtd arrived ? */
- return; /* yes, then continue */
- else /* no, then return with error */
- longjmp (hftenv, -1);
-
-}
-
-/*********************************************************************/
-/*** ***/
-/*** NOTE: Both the HFCTLREQ and the arg structure should be ***/
-/*** sent in one io write operation. If terminal ***/
-/*** emulators are in NODELAY mode then multiple writes ***/
-/*** may cause bogus information to be read by the emulator ***/
-/*** depending on the timing. ***/
-/*** ***/
-/*********************************************************************/
-
-static int
-WR_REQ (fd, request, cmdlen, cmd, resplen)
- int fd;
- int request;
- int cmdlen;
- char *cmd;
- int resplen;
-{
- struct {
- char *c;
- struct hfctlreq *req;
- } p;
- int size;
-
- req.hf_request = request;
- req.hf_arg_len = cmdlen;
- req.hf_rsp_len = resplen;
-
- if (cmdlen) /* if arg structure to pass */
- {
- size = sizeof (struct hfctlreq) + cmdlen;
- if ((p.c = xmalloc(size)) == NULL) /* malloc one area */
- return (-1);
-
- memcpy (p.c, &req, sizeof (req)); /* copy CTL REQ struct */
- memcpy (p.c + sizeof (req), cmd, cmdlen); /* copy arg struct */
- }
- else
- {
- p.req = &req; /* otherwise use only CTL REQ */
- size = sizeof (req);
- }
-
- /* write request to terminal */
- if (emacs_write (fd, p.c, size) == -1) return (-1);
- if (p.req != &req) /* free if allocated */
- xfree (p.c);
- return (0);
-
-}
-
-/* arch-tag: cfd4f3bd-fd49-44e6-9f69-c8abdf367650
- (do not change this comment) */
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