428
+ − 1 /* IBM has disclaimed copyright on this module. */
+ − 2
+ − 3 /* Synched up with: FSF 19.30. */
+ − 4
+ − 5 /***************************************************************/
+ − 6 /* */
+ − 7 /* Function: hftctl */
+ − 8 /* */
+ − 9 /* Syntax: */
+ − 10 /* #include <sys/ioctl.h> */
+ − 11 /* #include <sys/hft.h> */
+ − 12 /* */
+ − 13 /* int hftctl(fildes, request, arg ) */
+ − 14 /* int fildes, request; */
+ − 15 /* char *arg; */
+ − 16 /* */
+ − 17 /* Description: */
+ − 18 /* */
+ − 19 /* Does the following: */
+ − 20 /* 1. determines if fildes is pty */
+ − 21 /* does normal ioctl it is not */
+ − 22 /* 2. places fildes into raw mode */
+ − 23 /* 3. converts ioctl arguments to data stream */
+ − 24 /* 4. waits for 2 secs for acknowledgement before */
+ − 25 /* timing out. */
+ − 26 /* 5. places response in callers buffer ( just like */
+ − 27 /* ioctl. */
+ − 28 /* 6. returns fildes to its original mode */
+ − 29 /* */
+ − 30 /* User of this program should review steps 1,4, and 3. */
+ − 31 /* hftctl makes no check on the request type. It must be */
+ − 32 /* a HFT ioctl that is supported remotely. */
+ − 33 /* This program will use the SIGALRM and alarm(2). Any */
+ − 34 /* Previous alarms are lost. */
+ − 35 /* */
+ − 36 /* Users of this program are free to modify it any way */
+ − 37 /* they want. */
+ − 38 /* */
+ − 39 /* Return Value: */
+ − 40 /* */
+ − 41 /* If ioctl fails, a value of -1 is returned and errno */
+ − 42 /* is set to indicate the error. */
+ − 43 /* */
+ − 44 /***************************************************************/
+ − 45
+ − 46 #include <config.h>
647
+ − 47 #include "lisp.h"
+ − 48 #include "sysfile.h"
428
+ − 49
+ − 50 #include <sys/signal.h>
+ − 51 #include <errno.h>
+ − 52
+ − 53 #include <stdio.h>
+ − 54 #include <fcntl.h>
+ − 55 #include <setjmp.h>
+ − 56 #include <sys/ioctl.h>
+ − 57 #include <sys/devinfo.h>
+ − 58 #include <termios.h>
+ − 59 #include <termio.h>
+ − 60 #include <sys/hft.h>
+ − 61 #include <sys/uio.h>
+ − 62 #include <sys/tty.h>
+ − 63 /* #include <sys/pty.h> */
+ − 64
+ − 65 #define REMOTE 0x01
+ − 66
+ − 67 #undef ioctl
+ − 68 static char SCCSid[] = "com/gnuemacs/src,3.1,9021-90/05/03-5/3/90";
+ − 69
+ − 70 /*************** LOCAL DEFINES **********************************/
+ − 71
+ − 72 #define QDEV ((HFQPDEVCH<<8)|HFQPDEVCL)
+ − 73 #define QLOC ((HFQLOCCH<<8)|HFQLOCCL)
+ − 74 #define QPS ((HFQPRESCH<<8)|HFQPRESCL)
+ − 75
+ − 76 #ifndef TCGETS
+ − 77 #define TCGETS TCGETA
+ − 78 #endif
+ − 79 #ifndef TCSETS
+ − 80 #define TCSETS TCSETA
+ − 81 #endif
+ − 82
+ − 83 /*************** EXTERNAL / GLOBAL DATA AREA ********************/
+ − 84
+ − 85 static int hfqry();
+ − 86 static int hfskbd();
+ − 87
+ − 88 extern int errno;
+ − 89 static JMP_BUF hftenv;
+ − 90 static int is_ack_vtd;
+ − 91 static SIGTYPE (*sav_alrm) ();
+ − 92 static struct hfctlreq req =
+ − 93 { 0x1b,'[','x',0,0,0,21,HFCTLREQCH,HFCTLREQCL};
+ − 94 static struct hfctlack ACK =
+ − 95 { 0x1b,'[','x',0,0,0,21,HFCTLACKCH,HFCTLACKCL};
+ − 96
+ − 97 /* FUNC signal(); */
+ − 98
+ − 99 /*************** LOCAL MACROS ***********************************/
+ − 100
+ − 101 #define HFTYPE(p) ((p->hf_typehi<<8)|(p->hf_typelo))
+ − 102
+ − 103 #define BYTE4(p) ((p)[0]<<24 | (p)[1]<<16 | (p)[2]<<8 | (p)[3])
+ − 104
+ − 105 /* read a buffer */
+ − 106 #define RD_BUF(f,p,l) \
+ − 107 while ((l)) \
647
+ − 108 if ((j = read ((f),(p),(l))) < 0) \
428
+ − 109 if (errno != EINTR) return (-1); \
+ − 110 else continue; \
+ − 111 else { (l) -= j; (p) += j; }
+ − 112
+ − 113 /*************** function prototypes ***************************/
+ − 114 #ifdef __STDC__
+ − 115 static GT_ACK (int fd, int req, char *buf);
+ − 116 static WR_REQ (int fd, int request, int cmdlen, char *cmd, int resplen);
+ − 117 static void hft_alrm(int sig);
+ − 118 #else
+ − 119 static GT_ACK ();
+ − 120 static WR_REQ ();
+ − 121 static void hft_alrm ();
+ − 122 #endif
+ − 123
+ − 124 /*************** HFTCTL FUNCTION *******************************/
+ − 125
+ − 126 hftctl (fd, request, arg)
+ − 127 int fd;
+ − 128 int request;
+ − 129 union {
+ − 130 struct hfintro *intro;
+ − 131 struct hfquery *query;
+ − 132 char *c;
+ − 133 } arg;
+ − 134 {
+ − 135
+ − 136 int i;
+ − 137 int fd_flag; /* fcntl flags */
+ − 138 union {
+ − 139 struct hfintro *cmd; /* p.cmd - intro des. */
+ − 140 struct hfqphdevc *ph; /* p.ph - physical dev.*/
+ − 141 char *c; /* p.c - char ptr */
+ − 142 } p; /* general pointer */
+ − 143 int pty_new; /* pty modes */
+ − 144 int pty_old;
+ − 145 int retcode;
+ − 146 struct termios term_new; /* terminal attributes */
+ − 147 struct termios term_old;
+ − 148 struct devinfo devInfo; /* defined in sys/devinfo.h */
+ − 149
+ − 150
+ − 151 if (ioctl (fd, IOCINFO, &devInfo) == -1) return(-1);
+ − 152
+ − 153 if (devInfo.devtype != DD_PSEU) /* is it a pty? */
+ − 154 return (ioctl(fd, request, arg)); /* no, do IOCTL */
+ − 155
+ − 156 /******* START PTY **************/
+ − 157 /** Pty found, possible HFT */
+ − 158 /** set new file des as raw */
+ − 159 /** as you can. */
+ − 160 /********************************/
+ − 161
+ − 162 /* Get current state of file */
+ − 163 /* descriptor & save */
+ − 164 if ((fd_flag = fcntl (fd, F_GETFL, 0)) == -1) return (-1);
+ − 165 if (ioctl (fd, TCGETS, &term_old) == -1) return (-1);
+ − 166 /* set terminal attr to raw */
+ − 167 /* and to delay on read */
+ − 168 pty_new = pty_old | REMOTE;
+ − 169 memcpy (&term_new, &term_old, sizeof (term_new));
+ − 170 term_new.c_iflag = 0;
+ − 171 term_new.c_oflag = 0;
+ − 172 term_new.c_lflag = 0;
+ − 173 /* term_new.c_line = 0; */
+ − 174 for (i = 1; i <= 5; i++)
+ − 175 term_new.c_cc[i] = 0;
+ − 176 term_new.c_cc[0] = -1;
+ − 177 ioctl (fd, TCSETS, &term_new);
+ − 178 if (fcntl (fd, F_SETFL, fd_flag & ~O_NDELAY) == -1)
+ − 179 return(-1);
+ − 180 /* call spacific function */
+ − 181 if (request == HFSKBD)
+ − 182 retcode = hfskbd (fd, request, arg.c);
+ − 183 else /* assume HFQUERY */
+ − 184 retcode = hfqry (fd, request, arg.c);
+ − 185
+ − 186 fcntl (fd, F_SETFL, fd_flag); /* reset terminal to original */
+ − 187 ioctl (fd, TCSETS, &term_old);
+ − 188
+ − 189
+ − 190 return (retcode); /* return error */
+ − 191 }
+ − 192
+ − 193 /*************** HFSKBD FUNCTION ******************************/
+ − 194 static int
+ − 195 hfskbd (fd, request, arg)
+ − 196 int fd;
+ − 197 int request;
+ − 198 struct hfbuf *arg;
+ − 199 {
+ − 200 WR_REQ(fd, request, arg->hf_buflen, arg->hf_bufp,0);
+ − 201 return (GT_ACK(fd, request, arg->hf_bufp));
+ − 202 }
+ − 203
+ − 204 /*************** HFQUERY FUNCTION ******************************/
+ − 205 static int
+ − 206 hfqry (fd, request, arg)
+ − 207 int fd;
+ − 208 int request;
+ − 209 struct hfquery *arg;
+ − 210 {
+ − 211 WR_REQ(fd, request, arg->hf_cmdlen, arg->hf_cmd, arg->hf_resplen);
+ − 212 return (GT_ACK(fd, request, arg->hf_resp));
+ − 213 }
+ − 214
+ − 215
+ − 216 /*************** GT_ACK FUNCTION ******************************/
+ − 217 static int
+ − 218 GT_ACK (fd, req, buf)
+ − 219 int fd;
+ − 220 int req;
+ − 221 char *buf;
+ − 222 {
+ − 223 struct hfctlack ack;
+ − 224 int i = sizeof (ack);
+ − 225 int j = 0;
+ − 226 union {
+ − 227 char *c;
+ − 228 struct hfctlack *ack;
+ − 229 } p;
+ − 230
+ − 231 is_ack_vtd = 0; /* flag no ACT VTD yet */
+ − 232
+ − 233 if (SETJMP (hftenv)) /* set environment in case */
+ − 234 { /* of time out */
+ − 235 errno = ENODEV; /* if time out, set errno */
+ − 236 return (-1); /* flag error */
+ − 237 }
+ − 238
+ − 239 alarm(3); /* time out in 3 secs */
+ − 240 sav_alrm = signal (SIGALRM, hft_alrm); /* prepare to catch time out */
+ − 241
+ − 242 p.ack = &ack;
+ − 243 while (! is_ack_vtd) /* do until valid ACK VTD */
+ − 244 {
+ − 245 RD_BUF(fd, p.c, i); /* read until a ACK VTD is fill*/
+ − 246
+ − 247 if (! memcmp (&ack, &ACK, sizeof (HFINTROSZ)) /* the ACK intro & */
+ − 248 && (ack.hf_request == req)) /* is it the response we want ?*/
+ − 249 { /* yes, ACK VTD found */
+ − 250 is_ack_vtd = 1; /* quickly, flag it */
+ − 251 break; /* get the %$%#@ out of here */
+ − 252 }
+ − 253
+ − 254 p.ack = &ack; /* no, then skip 1st */
+ − 255 ++p.c; /* char and start over */
+ − 256 i = sizeof (ack) - 1; /* one less ESC to cry over */
+ − 257
+ − 258 while ((*p.c != 0x1b) && i) /* scan for next ESC */
+ − 259 { ++p.c; --i; } /* if any */
+ − 260
+ − 261 (i ? memcpy (&ack, p.c, i) : 0); /* if any left over, then move */
+ − 262 p.ack = &ack; /* ESC to front of ack struct */
+ − 263 p.c += i; /* skip over what's been read */
+ − 264 i = sizeof (ack) - i; /* set what's left to be read */
+ − 265 } /***** TRY AGAIN */
+ − 266
+ − 267 alarm(0); /* ACK VTD received, reset alrm*/
+ − 268 signal (SIGALRM, sav_alrm); /* reset signal */
+ − 269
+ − 270 if (i = ack.hf_arg_len) /* any data following ? */
+ − 271 { /* yes, */
+ − 272 RD_BUF(fd,buf,i); /* read until it is received */
+ − 273 }
+ − 274
+ − 275 if (errno = ack.hf_retcode) /* set errno based on returned */
+ − 276 return (-1); /* code, if 0, then no error */
+ − 277 else
+ − 278 return (0); /* if set, then error returned */
+ − 279 }
+ − 280
+ − 281 /*************** HFT_ALRM FUNCTION ******************************/
+ − 282 static void
+ − 283 hft_alrm (sig) /* Function hft_alrm - handle */
+ − 284 int sig; /* alarm signal */
+ − 285 {
+ − 286 signal (SIGALRM, sav_alrm); /* reset to previous */
+ − 287
+ − 288 if (is_ack_vtd) /* has ack vtd arrived ? */
+ − 289 return; /* yes, then continue */
+ − 290 else /* no, then return with error */
+ − 291 LONGJMP (hftenv, -1);
+ − 292
+ − 293 }
+ − 294
+ − 295 /*********************************************************************/
+ − 296 /*** ***/
+ − 297 /*** NOTE: Both the HFCTLREQ and the arg structure should be ***/
+ − 298 /*** sent in one io write operation. If terminal ***/
+ − 299 /*** emulators are in NODELAY mode then multiple writes ***/
+ − 300 /*** may cause bogus information to be read by the emulator ***/
+ − 301 /*** depending on the timing. ***/
+ − 302 /*** ***/
+ − 303 /*********************************************************************/
+ − 304
+ − 305 static int
+ − 306 WR_REQ (fd, request, cmdlen, cmd, resplen)
+ − 307 int fd;
+ − 308 int request;
+ − 309 int cmdlen;
+ − 310 char *cmd;
+ − 311 int resplen;
+ − 312 {
+ − 313 struct {
+ − 314 char *c;
+ − 315 struct hfctlreq *req;
+ − 316 } p;
+ − 317 int size;
+ − 318
+ − 319 req.hf_request = request;
+ − 320 req.hf_arg_len = cmdlen;
+ − 321 req.hf_rsp_len = resplen;
+ − 322
+ − 323 if (cmdlen) /* if arg structure to pass */
+ − 324 {
+ − 325 size = sizeof (struct hfctlreq) + cmdlen;
+ − 326 if ((p.c = xmalloc(size)) == NULL) /* malloc one area */
+ − 327 return (-1);
+ − 328
+ − 329 memcpy (p.c, &req, sizeof (req)); /* copy CTL REQ struct */
+ − 330 memcpy (p.c + sizeof (req), cmd, cmdlen); /* copy arg struct */
+ − 331 }
+ − 332 else
+ − 333 {
+ − 334 p.req = &req; /* otherwise use only CTL REQ */
+ − 335 size = sizeof (req);
+ − 336 }
+ − 337
+ − 338 /* write request to terminal */
+ − 339 if (write(fd,p.c,size) == -1) return (-1);
+ − 340 if (p.req != &req) /* free if allocated */
+ − 341 xfree (p.c);
+ − 342 return (0);
+ − 343 }
