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428
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1 /* IBM has disclaimed copyright on this module. */
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2
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3 /* Synched up with: FSF 19.30. */
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4
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5 /***************************************************************/
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6 /* */
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7 /* Function: hftctl */
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8 /* */
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9 /* Syntax: */
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10 /* #include <sys/ioctl.h> */
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11 /* #include <sys/hft.h> */
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12 /* */
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13 /* int hftctl(fildes, request, arg ) */
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14 /* int fildes, request; */
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15 /* char *arg; */
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16 /* */
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17 /* Description: */
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18 /* */
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19 /* Does the following: */
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20 /* 1. determines if fildes is pty */
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21 /* does normal ioctl it is not */
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22 /* 2. places fildes into raw mode */
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23 /* 3. converts ioctl arguments to data stream */
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24 /* 4. waits for 2 secs for acknowledgement before */
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25 /* timing out. */
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26 /* 5. places response in callers buffer ( just like */
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27 /* ioctl. */
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28 /* 6. returns fildes to its original mode */
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29 /* */
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30 /* User of this program should review steps 1,4, and 3. */
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31 /* hftctl makes no check on the request type. It must be */
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32 /* a HFT ioctl that is supported remotely. */
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33 /* This program will use the SIGALRM and alarm(2). Any */
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34 /* Previous alarms are lost. */
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35 /* */
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36 /* Users of this program are free to modify it any way */
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37 /* they want. */
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38 /* */
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39 /* Return Value: */
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40 /* */
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41 /* If ioctl fails, a value of -1 is returned and errno */
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42 /* is set to indicate the error. */
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43 /* */
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44 /***************************************************************/
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45
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46 #include <config.h>
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647
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47 #include "lisp.h"
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48 #include "sysfile.h"
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428
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49
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50 #include <sys/signal.h>
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51 #include <errno.h>
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52
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53 #include <stdio.h>
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54 #include <fcntl.h>
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55 #include <setjmp.h>
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56 #include <sys/ioctl.h>
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57 #include <sys/devinfo.h>
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58 #include <termios.h>
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59 #include <termio.h>
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60 #include <sys/hft.h>
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61 #include <sys/uio.h>
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62 #include <sys/tty.h>
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63 /* #include <sys/pty.h> */
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64
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65 #define REMOTE 0x01
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66
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67 #undef ioctl
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68 static char SCCSid[] = "com/gnuemacs/src,3.1,9021-90/05/03-5/3/90";
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69
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70 /*************** LOCAL DEFINES **********************************/
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71
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72 #define QDEV ((HFQPDEVCH<<8)|HFQPDEVCL)
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73 #define QLOC ((HFQLOCCH<<8)|HFQLOCCL)
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74 #define QPS ((HFQPRESCH<<8)|HFQPRESCL)
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75
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76 #ifndef TCGETS
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77 #define TCGETS TCGETA
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78 #endif
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79 #ifndef TCSETS
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80 #define TCSETS TCSETA
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81 #endif
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82
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83 /*************** EXTERNAL / GLOBAL DATA AREA ********************/
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84
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85 static int hfqry();
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86 static int hfskbd();
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87
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88 extern int errno;
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89 static JMP_BUF hftenv;
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90 static int is_ack_vtd;
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91 static SIGTYPE (*sav_alrm) ();
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92 static struct hfctlreq req =
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93 { 0x1b,'[','x',0,0,0,21,HFCTLREQCH,HFCTLREQCL};
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94 static struct hfctlack ACK =
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95 { 0x1b,'[','x',0,0,0,21,HFCTLACKCH,HFCTLACKCL};
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96
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97 /* FUNC signal(); */
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98
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99 /*************** LOCAL MACROS ***********************************/
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100
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101 #define HFTYPE(p) ((p->hf_typehi<<8)|(p->hf_typelo))
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102
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103 #define BYTE4(p) ((p)[0]<<24 | (p)[1]<<16 | (p)[2]<<8 | (p)[3])
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104
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105 /* read a buffer */
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106 #define RD_BUF(f,p,l) \
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107 while ((l)) \
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647
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108 if ((j = read ((f),(p),(l))) < 0) \
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428
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109 if (errno != EINTR) return (-1); \
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110 else continue; \
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111 else { (l) -= j; (p) += j; }
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112
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113 /*************** function prototypes ***************************/
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114 #ifdef __STDC__
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115 static GT_ACK (int fd, int req, char *buf);
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116 static WR_REQ (int fd, int request, int cmdlen, char *cmd, int resplen);
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117 static void hft_alrm(int sig);
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118 #else
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119 static GT_ACK ();
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120 static WR_REQ ();
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121 static void hft_alrm ();
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122 #endif
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123
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124 /*************** HFTCTL FUNCTION *******************************/
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125
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126 hftctl (fd, request, arg)
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127 int fd;
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128 int request;
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129 union {
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130 struct hfintro *intro;
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131 struct hfquery *query;
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132 char *c;
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133 } arg;
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134 {
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135
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136 int i;
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137 int fd_flag; /* fcntl flags */
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138 union {
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139 struct hfintro *cmd; /* p.cmd - intro des. */
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140 struct hfqphdevc *ph; /* p.ph - physical dev.*/
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141 char *c; /* p.c - char ptr */
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142 } p; /* general pointer */
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143 int pty_new; /* pty modes */
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144 int pty_old;
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145 int retcode;
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146 struct termios term_new; /* terminal attributes */
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147 struct termios term_old;
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148 struct devinfo devInfo; /* defined in sys/devinfo.h */
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149
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150
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151 if (ioctl (fd, IOCINFO, &devInfo) == -1) return(-1);
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152
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153 if (devInfo.devtype != DD_PSEU) /* is it a pty? */
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154 return (ioctl(fd, request, arg)); /* no, do IOCTL */
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155
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156 /******* START PTY **************/
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157 /** Pty found, possible HFT */
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158 /** set new file des as raw */
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159 /** as you can. */
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160 /********************************/
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161
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162 /* Get current state of file */
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163 /* descriptor & save */
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164 if ((fd_flag = fcntl (fd, F_GETFL, 0)) == -1) return (-1);
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165 if (ioctl (fd, TCGETS, &term_old) == -1) return (-1);
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166 /* set terminal attr to raw */
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167 /* and to delay on read */
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168 pty_new = pty_old | REMOTE;
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169 memcpy (&term_new, &term_old, sizeof (term_new));
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170 term_new.c_iflag = 0;
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171 term_new.c_oflag = 0;
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172 term_new.c_lflag = 0;
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173 /* term_new.c_line = 0; */
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174 for (i = 1; i <= 5; i++)
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175 term_new.c_cc[i] = 0;
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176 term_new.c_cc[0] = -1;
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177 ioctl (fd, TCSETS, &term_new);
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178 if (fcntl (fd, F_SETFL, fd_flag & ~O_NDELAY) == -1)
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179 return(-1);
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180 /* call spacific function */
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181 if (request == HFSKBD)
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182 retcode = hfskbd (fd, request, arg.c);
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183 else /* assume HFQUERY */
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184 retcode = hfqry (fd, request, arg.c);
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185
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186 fcntl (fd, F_SETFL, fd_flag); /* reset terminal to original */
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187 ioctl (fd, TCSETS, &term_old);
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188
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189
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190 return (retcode); /* return error */
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191 }
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192
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193 /*************** HFSKBD FUNCTION ******************************/
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194 static int
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195 hfskbd (fd, request, arg)
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196 int fd;
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197 int request;
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198 struct hfbuf *arg;
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199 {
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200 WR_REQ(fd, request, arg->hf_buflen, arg->hf_bufp,0);
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201 return (GT_ACK(fd, request, arg->hf_bufp));
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202 }
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203
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204 /*************** HFQUERY FUNCTION ******************************/
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205 static int
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206 hfqry (fd, request, arg)
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207 int fd;
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208 int request;
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209 struct hfquery *arg;
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210 {
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211 WR_REQ(fd, request, arg->hf_cmdlen, arg->hf_cmd, arg->hf_resplen);
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212 return (GT_ACK(fd, request, arg->hf_resp));
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213 }
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214
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215
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216 /*************** GT_ACK FUNCTION ******************************/
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217 static int
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218 GT_ACK (fd, req, buf)
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219 int fd;
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220 int req;
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221 char *buf;
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222 {
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223 struct hfctlack ack;
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224 int i = sizeof (ack);
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225 int j = 0;
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226 union {
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227 char *c;
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228 struct hfctlack *ack;
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229 } p;
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230
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231 is_ack_vtd = 0; /* flag no ACT VTD yet */
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232
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233 if (SETJMP (hftenv)) /* set environment in case */
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234 { /* of time out */
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235 errno = ENODEV; /* if time out, set errno */
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236 return (-1); /* flag error */
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237 }
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238
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239 alarm(3); /* time out in 3 secs */
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240 sav_alrm = signal (SIGALRM, hft_alrm); /* prepare to catch time out */
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241
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242 p.ack = &ack;
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243 while (! is_ack_vtd) /* do until valid ACK VTD */
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244 {
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245 RD_BUF(fd, p.c, i); /* read until a ACK VTD is fill*/
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246
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247 if (! memcmp (&ack, &ACK, sizeof (HFINTROSZ)) /* the ACK intro & */
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248 && (ack.hf_request == req)) /* is it the response we want ?*/
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249 { /* yes, ACK VTD found */
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250 is_ack_vtd = 1; /* quickly, flag it */
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251 break; /* get the %$%#@ out of here */
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252 }
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253
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254 p.ack = &ack; /* no, then skip 1st */
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255 ++p.c; /* char and start over */
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256 i = sizeof (ack) - 1; /* one less ESC to cry over */
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257
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258 while ((*p.c != 0x1b) && i) /* scan for next ESC */
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259 { ++p.c; --i; } /* if any */
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260
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261 (i ? memcpy (&ack, p.c, i) : 0); /* if any left over, then move */
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262 p.ack = &ack; /* ESC to front of ack struct */
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263 p.c += i; /* skip over what's been read */
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264 i = sizeof (ack) - i; /* set what's left to be read */
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265 } /***** TRY AGAIN */
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266
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267 alarm(0); /* ACK VTD received, reset alrm*/
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268 signal (SIGALRM, sav_alrm); /* reset signal */
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269
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270 if (i = ack.hf_arg_len) /* any data following ? */
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271 { /* yes, */
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272 RD_BUF(fd,buf,i); /* read until it is received */
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273 }
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274
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275 if (errno = ack.hf_retcode) /* set errno based on returned */
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276 return (-1); /* code, if 0, then no error */
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277 else
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278 return (0); /* if set, then error returned */
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279 }
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280
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281 /*************** HFT_ALRM FUNCTION ******************************/
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282 static void
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283 hft_alrm (sig) /* Function hft_alrm - handle */
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284 int sig; /* alarm signal */
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285 {
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286 signal (SIGALRM, sav_alrm); /* reset to previous */
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287
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288 if (is_ack_vtd) /* has ack vtd arrived ? */
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289 return; /* yes, then continue */
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290 else /* no, then return with error */
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291 LONGJMP (hftenv, -1);
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292
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293 }
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294
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295 /*********************************************************************/
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296 /*** ***/
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297 /*** NOTE: Both the HFCTLREQ and the arg structure should be ***/
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298 /*** sent in one io write operation. If terminal ***/
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299 /*** emulators are in NODELAY mode then multiple writes ***/
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300 /*** may cause bogus information to be read by the emulator ***/
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301 /*** depending on the timing. ***/
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302 /*** ***/
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303 /*********************************************************************/
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304
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305 static int
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306 WR_REQ (fd, request, cmdlen, cmd, resplen)
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307 int fd;
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308 int request;
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309 int cmdlen;
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310 char *cmd;
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311 int resplen;
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312 {
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313 struct {
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314 char *c;
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315 struct hfctlreq *req;
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316 } p;
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317 int size;
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318
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319 req.hf_request = request;
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320 req.hf_arg_len = cmdlen;
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321 req.hf_rsp_len = resplen;
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322
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323 if (cmdlen) /* if arg structure to pass */
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324 {
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325 size = sizeof (struct hfctlreq) + cmdlen;
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2367
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326 if ((p.c = xmalloc (size)) == NULL) /* malloc one area */
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428
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327 return (-1);
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328
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329 memcpy (p.c, &req, sizeof (req)); /* copy CTL REQ struct */
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330 memcpy (p.c + sizeof (req), cmd, cmdlen); /* copy arg struct */
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331 }
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332 else
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333 {
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334 p.req = &req; /* otherwise use only CTL REQ */
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335 size = sizeof (req);
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336 }
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337
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338 /* write request to terminal */
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339 if (write(fd,p.c,size) == -1) return (-1);
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340 if (p.req != &req) /* free if allocated */
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1726
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341 xfree (p.c, char *);
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428
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342 return (0);
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343 }
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