1 | /*- |
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2 | * Copyright (c) 1992, 1993, 1994 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * Copyright (c) 1992, 1993, 1994, 1995, 1996 |
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5 | * Keith Bostic. All rights reserved. |
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6 | * |
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7 | * See the LICENSE file for redistribution information. |
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8 | */ |
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9 | |
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10 | #include "config.h" |
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11 | |
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12 | #ifndef lint |
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13 | static const char copyright[] = |
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14 | "@(#) Copyright (c) 1992, 1993, 1994\n\ |
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15 | The Regents of the University of California. All rights reserved.\n\ |
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16 | @(#) Copyright (c) 1992, 1993, 1994, 1995, 1996\n\ |
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17 | Keith Bostic. All rights reserved.\n"; |
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18 | #endif /* not lint */ |
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19 | |
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20 | #ifndef lint |
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21 | static const char sccsid[] = "@(#)main.c 10.48 (Berkeley) 10/11/96"; |
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22 | #endif /* not lint */ |
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23 | |
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24 | #include <sys/types.h> |
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25 | #include <sys/queue.h> |
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26 | #include <sys/stat.h> |
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27 | #include <sys/time.h> |
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28 | |
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29 | #include <bitstring.h> |
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30 | #include <errno.h> |
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31 | #include <fcntl.h> |
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32 | #include <limits.h> |
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33 | #include <stdio.h> |
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34 | #include <stdlib.h> |
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35 | #include <string.h> |
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36 | #include <unistd.h> |
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37 | |
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38 | #include "common.h" |
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39 | #include "../vi/vi.h" |
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40 | #include "pathnames.h" |
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41 | |
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42 | static void attach __P((GS *)); |
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43 | static void v_estr __P((char *, int, char *)); |
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44 | static int v_obsolete __P((char *, char *[])); |
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45 | |
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46 | /* |
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47 | * editor -- |
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48 | * Main editor routine. |
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49 | * |
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50 | * PUBLIC: int editor __P((GS *, int, char *[])); |
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51 | */ |
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52 | int |
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53 | editor(gp, argc, argv) |
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54 | GS *gp; |
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55 | int argc; |
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56 | char *argv[]; |
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57 | { |
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58 | extern int optind; |
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59 | extern char *optarg; |
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60 | const char *p; |
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61 | EVENT ev; |
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62 | FREF *frp; |
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63 | SCR *sp; |
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64 | size_t len; |
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65 | u_int flags; |
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66 | int ch, flagchk, lflag, secure, startup, readonly, rval, silent; |
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67 | char *tag_f, *wsizearg, path[256]; |
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68 | |
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69 | /* Initialize the busy routine, if not defined by the screen. */ |
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70 | if (gp->scr_busy == NULL) |
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71 | gp->scr_busy = vs_busy; |
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72 | /* Initialize the message routine, if not defined by the screen. */ |
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73 | if (gp->scr_msg == NULL) |
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74 | gp->scr_msg = vs_msg; |
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75 | |
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76 | /* Common global structure initialization. */ |
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77 | CIRCLEQ_INIT(&gp->dq); |
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78 | CIRCLEQ_INIT(&gp->hq); |
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79 | LIST_INIT(&gp->ecq); |
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80 | LIST_INSERT_HEAD(&gp->ecq, &gp->excmd, q); |
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81 | gp->noprint = DEFAULT_NOPRINT; |
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82 | |
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83 | /* Structures shared by screens so stored in the GS structure. */ |
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84 | CIRCLEQ_INIT(&gp->frefq); |
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85 | CIRCLEQ_INIT(&gp->dcb_store.textq); |
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86 | LIST_INIT(&gp->cutq); |
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87 | LIST_INIT(&gp->seqq); |
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88 | |
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89 | /* Set initial screen type and mode based on the program name. */ |
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90 | readonly = 0; |
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91 | if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex")) |
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92 | LF_INIT(SC_EX); |
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93 | else { |
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94 | /* Nview, view are readonly. */ |
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95 | if (!strcmp(gp->progname, "nview") || |
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96 | !strcmp(gp->progname, "view")) |
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97 | readonly = 1; |
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98 | |
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99 | /* Vi is the default. */ |
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100 | LF_INIT(SC_VI); |
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101 | } |
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102 | |
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103 | /* Convert old-style arguments into new-style ones. */ |
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104 | if (v_obsolete(gp->progname, argv)) |
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105 | return (1); |
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106 | |
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107 | /* Parse the arguments. */ |
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108 | flagchk = '\0'; |
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109 | tag_f = wsizearg = NULL; |
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110 | lflag = secure = silent = 0; |
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111 | startup = 1; |
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112 | |
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113 | /* Set the file snapshot flag. */ |
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114 | F_SET(gp, G_SNAPSHOT); |
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115 | |
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116 | #ifdef DEBUG |
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117 | while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF) |
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118 | #else |
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119 | while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF) |
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120 | #endif |
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121 | switch (ch) { |
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122 | case 'c': /* Run the command. */ |
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123 | /* |
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124 | * XXX |
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125 | * We should support multiple -c options. |
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126 | */ |
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127 | if (gp->c_option != NULL) { |
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128 | v_estr(gp->progname, 0, |
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129 | "only one -c command may be specified."); |
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130 | return (1); |
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131 | } |
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132 | gp->c_option = optarg; |
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133 | break; |
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134 | #ifdef DEBUG |
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135 | case 'D': |
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136 | switch (optarg[0]) { |
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137 | case 's': |
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138 | startup = 0; |
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139 | break; |
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140 | case 'w': |
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141 | attach(gp); |
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142 | break; |
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143 | default: |
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144 | v_estr(gp->progname, 0, |
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145 | "usage: -D requires s or w argument."); |
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146 | return (1); |
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147 | } |
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148 | break; |
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149 | #endif |
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150 | case 'e': /* Ex mode. */ |
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151 | LF_CLR(SC_VI); |
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152 | LF_SET(SC_EX); |
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153 | break; |
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154 | case 'F': /* No snapshot. */ |
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155 | F_CLR(gp, G_SNAPSHOT); |
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156 | break; |
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157 | case 'l': /* Set lisp, showmatch options. */ |
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158 | lflag = 1; |
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159 | break; |
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160 | case 'R': /* Readonly. */ |
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161 | readonly = 1; |
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162 | break; |
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163 | case 'r': /* Recover. */ |
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164 | if (flagchk == 't') { |
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165 | v_estr(gp->progname, 0, |
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166 | "only one of -r and -t may be specified."); |
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167 | return (1); |
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168 | } |
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169 | flagchk = 'r'; |
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170 | break; |
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171 | case 'S': |
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172 | secure = 1; |
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173 | break; |
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174 | case 's': |
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175 | silent = 1; |
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176 | break; |
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177 | #ifdef DEBUG |
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178 | case 'T': /* Trace. */ |
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179 | if ((gp->tracefp = fopen(optarg, "w")) == NULL) { |
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180 | v_estr(gp->progname, errno, optarg); |
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181 | goto err; |
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182 | } |
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183 | (void)fprintf(gp->tracefp, |
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184 | "\n===\ntrace: open %s\n", optarg); |
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185 | break; |
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186 | #endif |
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187 | case 't': /* Tag. */ |
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188 | if (flagchk == 'r') { |
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189 | v_estr(gp->progname, 0, |
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190 | "only one of -r and -t may be specified."); |
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191 | return (1); |
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192 | } |
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193 | if (flagchk == 't') { |
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194 | v_estr(gp->progname, 0, |
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195 | "only one tag file may be specified."); |
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196 | return (1); |
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197 | } |
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198 | flagchk = 't'; |
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199 | tag_f = optarg; |
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200 | break; |
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201 | case 'v': /* Vi mode. */ |
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202 | LF_CLR(SC_EX); |
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203 | LF_SET(SC_VI); |
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204 | break; |
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205 | case 'w': |
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206 | wsizearg = optarg; |
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207 | break; |
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208 | case '?': |
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209 | default: |
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210 | (void)gp->scr_usage(); |
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211 | return (1); |
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212 | } |
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213 | argc -= optind; |
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214 | argv += optind; |
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215 | |
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216 | /* |
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217 | * -s option is only meaningful to ex. |
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218 | * |
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219 | * If not reading from a terminal, it's like -s was specified. |
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220 | */ |
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221 | if (silent && !LF_ISSET(SC_EX)) { |
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222 | v_estr(gp->progname, 0, "-s option is only applicable to ex."); |
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223 | goto err; |
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224 | } |
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225 | if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED)) |
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226 | silent = 1; |
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227 | |
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228 | /* |
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229 | * Build and initialize the first/current screen. This is a bit |
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230 | * tricky. If an error is returned, we may or may not have a |
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231 | * screen structure. If we have a screen structure, put it on a |
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232 | * display queue so that the error messages get displayed. |
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233 | * |
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234 | * !!! |
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235 | * Everything we do until we go interactive is done in ex mode. |
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236 | */ |
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237 | if (screen_init(gp, NULL, &sp)) { |
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238 | if (sp != NULL) |
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239 | CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q); |
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240 | goto err; |
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241 | } |
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242 | F_SET(sp, SC_EX); |
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243 | CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q); |
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244 | |
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245 | if (v_key_init(sp)) /* Special key initialization. */ |
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246 | goto err; |
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247 | |
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248 | { int oargs[5], *oargp = oargs; |
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249 | if (lflag) { /* Command-line options. */ |
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250 | *oargp++ = O_LISP; |
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251 | *oargp++ = O_SHOWMATCH; |
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252 | } |
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253 | if (readonly) |
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254 | *oargp++ = O_READONLY; |
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255 | if (secure) |
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256 | *oargp++ = O_SECURE; |
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257 | *oargp = -1; /* Options initialization. */ |
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258 | if (opts_init(sp, oargs)) |
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259 | goto err; |
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260 | } |
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261 | if (wsizearg != NULL) { |
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262 | ARGS *av[2], a, b; |
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263 | (void)snprintf(path, sizeof(path), "window=%s", wsizearg); |
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264 | a.bp = (CHAR_T *)path; |
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265 | a.len = strlen(path); |
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266 | b.bp = NULL; |
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267 | b.len = 0; |
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268 | av[0] = &a; |
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269 | av[1] = &b; |
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270 | (void)opts_set(sp, av, NULL); |
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271 | } |
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272 | if (silent) { /* Ex batch mode option values. */ |
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273 | O_CLR(sp, O_AUTOPRINT); |
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274 | O_CLR(sp, O_PROMPT); |
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275 | O_CLR(sp, O_VERBOSE); |
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276 | O_CLR(sp, O_WARN); |
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277 | F_SET(sp, SC_EX_SILENT); |
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278 | } |
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279 | |
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280 | sp->rows = O_VAL(sp, O_LINES); /* Make ex formatting work. */ |
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281 | sp->cols = O_VAL(sp, O_COLUMNS); |
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282 | |
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283 | if (!silent && startup) { /* Read EXINIT, exrc files. */ |
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284 | if (ex_exrc(sp)) |
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285 | goto err; |
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286 | if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { |
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287 | if (screen_end(sp)) |
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288 | goto err; |
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289 | goto done; |
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290 | } |
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291 | } |
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292 | |
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293 | /* |
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294 | * List recovery files if -r specified without file arguments. |
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295 | * Note, options must be initialized and startup information |
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296 | * read before doing this. |
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297 | */ |
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298 | if (flagchk == 'r' && argv[0] == NULL) { |
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299 | if (rcv_list(sp)) |
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300 | goto err; |
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301 | if (screen_end(sp)) |
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302 | goto err; |
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303 | goto done; |
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304 | } |
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305 | |
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306 | /* |
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307 | * !!! |
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308 | * Initialize the default ^D, ^U scrolling value here, after the |
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309 | * user has had every opportunity to set the window option. |
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310 | * |
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311 | * It's historic practice that changing the value of the window |
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312 | * option did not alter the default scrolling value, only giving |
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313 | * a count to ^D/^U did that. |
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314 | */ |
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315 | sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2; |
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316 | |
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317 | /* |
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318 | * If we don't have a command-line option, switch into the right |
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319 | * editor now, so that we position default files correctly, and |
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320 | * so that any tags file file-already-locked messages are in the |
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321 | * vi screen, not the ex screen. |
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322 | * |
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323 | * XXX |
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324 | * If we have a command-line option, the error message can end |
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325 | * up in the wrong place, but I think that the combination is |
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326 | * unlikely. |
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327 | */ |
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328 | if (gp->c_option == NULL) { |
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329 | F_CLR(sp, SC_EX | SC_VI); |
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330 | F_SET(sp, LF_ISSET(SC_EX | SC_VI)); |
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331 | } |
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332 | |
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333 | /* Open a tag file if specified. */ |
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334 | if (tag_f != NULL && ex_tag_first(sp, tag_f)) |
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335 | goto err; |
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336 | |
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337 | /* |
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338 | * Append any remaining arguments as file names. Files are recovery |
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339 | * files if -r specified. If the tag option or ex startup commands |
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340 | * loaded a file, then any file arguments are going to come after it. |
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341 | */ |
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342 | if (*argv != NULL) { |
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343 | if (sp->frp != NULL) { |
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344 | /* Cheat -- we know we have an extra argv slot. */ |
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345 | MALLOC_NOMSG(sp, |
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346 | *--argv, char *, strlen(sp->frp->name) + 1); |
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347 | if (*argv == NULL) { |
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348 | v_estr(gp->progname, errno, NULL); |
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349 | goto err; |
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350 | } |
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351 | (void)strcpy(*argv, sp->frp->name); |
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352 | } |
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353 | sp->argv = sp->cargv = argv; |
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354 | F_SET(sp, SC_ARGNOFREE); |
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355 | if (flagchk == 'r') |
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356 | F_SET(sp, SC_ARGRECOVER); |
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357 | } |
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358 | |
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359 | /* |
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360 | * If the ex startup commands and or/the tag option haven't already |
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361 | * created a file, create one. If no command-line files were given, |
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362 | * use a temporary file. |
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363 | */ |
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364 | if (sp->frp == NULL) { |
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365 | if (sp->argv == NULL) { |
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366 | if ((frp = file_add(sp, NULL)) == NULL) |
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367 | goto err; |
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368 | } else { |
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369 | if ((frp = file_add(sp, (CHAR_T *)sp->argv[0])) == NULL) |
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370 | goto err; |
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371 | if (F_ISSET(sp, SC_ARGRECOVER)) |
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372 | F_SET(frp, FR_RECOVER); |
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373 | } |
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374 | |
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375 | if (file_init(sp, frp, NULL, 0)) |
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376 | goto err; |
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377 | if (EXCMD_RUNNING(gp)) { |
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378 | (void)ex_cmd(sp); |
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379 | if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { |
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380 | if (screen_end(sp)) |
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381 | goto err; |
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382 | goto done; |
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383 | } |
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384 | } |
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385 | } |
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386 | |
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387 | /* |
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388 | * Check to see if we need to wait for ex. If SC_SCR_EX is set, ex |
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389 | * was forced to initialize the screen during startup. We'd like to |
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390 | * wait for a single character from the user, but we can't because |
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391 | * we're not in raw mode. We can't switch to raw mode because the |
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392 | * vi initialization will switch to xterm's alternate screen, causing |
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393 | * us to lose the messages we're pausing to make sure the user read. |
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394 | * So, wait for a complete line. |
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395 | */ |
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396 | if (F_ISSET(sp, SC_SCR_EX)) { |
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397 | p = msg_cmsg(sp, CMSG_CONT_R, &len); |
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398 | (void)write(STDOUT_FILENO, p, len); |
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399 | for (;;) { |
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400 | if (v_event_get(sp, &ev, 0, 0)) |
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401 | goto err; |
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402 | if (ev.e_event == E_INTERRUPT || |
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403 | ev.e_event == E_CHARACTER && |
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404 | (ev.e_value == K_CR || ev.e_value == K_NL)) |
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405 | break; |
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406 | (void)gp->scr_bell(sp); |
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407 | } |
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408 | } |
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409 | |
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410 | /* Switch into the right editor, regardless. */ |
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411 | F_CLR(sp, SC_EX | SC_VI); |
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412 | F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT); |
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413 | |
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414 | /* |
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415 | * Main edit loop. Vi handles split screens itself, we only return |
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416 | * here when switching editor modes or restarting the screen. |
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417 | */ |
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418 | while (sp != NULL) |
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419 | if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp)) |
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420 | goto err; |
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421 | |
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422 | done: rval = 0; |
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423 | if (0) |
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424 | err: rval = 1; |
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425 | |
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426 | /* Clean out the global structure. */ |
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427 | v_end(gp); |
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428 | |
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429 | return (rval); |
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430 | } |
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431 | |
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432 | /* |
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433 | * v_end -- |
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434 | * End the program, discarding screens and most of the global area. |
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435 | * |
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436 | * PUBLIC: void v_end __P((GS *)); |
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437 | */ |
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438 | void |
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439 | v_end(gp) |
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440 | GS *gp; |
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441 | { |
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442 | MSGS *mp; |
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443 | SCR *sp; |
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444 | |
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445 | /* If there are any remaining screens, kill them off. */ |
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446 | if (gp->ccl_sp != NULL) { |
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447 | (void)file_end(gp->ccl_sp, NULL, 1); |
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448 | (void)screen_end(gp->ccl_sp); |
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449 | } |
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450 | while ((sp = gp->dq.cqh_first) != (void *)&gp->dq) |
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451 | (void)screen_end(sp); |
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452 | while ((sp = gp->hq.cqh_first) != (void *)&gp->hq) |
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453 | (void)screen_end(sp); |
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454 | |
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455 | #ifdef HAVE_PERL_INTERP |
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456 | perl_end(gp); |
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457 | #endif |
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458 | |
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459 | #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) |
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460 | { FREF *frp; |
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461 | /* Free FREF's. */ |
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462 | while ((frp = gp->frefq.cqh_first) != (FREF *)&gp->frefq) { |
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463 | CIRCLEQ_REMOVE(&gp->frefq, frp, q); |
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464 | if (frp->name != NULL) |
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465 | free(frp->name); |
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466 | if (frp->tname != NULL) |
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467 | free(frp->tname); |
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468 | free(frp); |
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469 | } |
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470 | } |
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471 | |
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472 | /* Free key input queue. */ |
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473 | if (gp->i_event != NULL) |
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474 | free(gp->i_event); |
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475 | |
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476 | /* Free cut buffers. */ |
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477 | cut_close(gp); |
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478 | |
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479 | /* Free map sequences. */ |
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480 | seq_close(gp); |
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481 | |
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482 | /* Free default buffer storage. */ |
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483 | (void)text_lfree(&gp->dcb_store.textq); |
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484 | |
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485 | /* Close message catalogs. */ |
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486 | msg_close(gp); |
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487 | #endif |
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488 | |
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489 | /* Ring the bell if scheduled. */ |
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490 | if (F_ISSET(gp, G_BELLSCHED)) |
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491 | (void)fprintf(stderr, "\07"); /* \a */ |
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492 | |
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493 | /* |
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494 | * Flush any remaining messages. If a message is here, it's almost |
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495 | * certainly the message about the event that killed us (although |
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496 | * it's possible that the user is sourcing a file that exits from the |
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497 | * editor). |
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498 | */ |
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499 | while ((mp = gp->msgq.lh_first) != NULL) { |
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500 | (void)fprintf(stderr, "%s%.*s", |
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501 | mp->mtype == M_ERR ? "ex/vi: " : "", (int)mp->len, mp->buf); |
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502 | LIST_REMOVE(mp, q); |
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503 | #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) |
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504 | free(mp->buf); |
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505 | free(mp); |
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506 | #endif |
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507 | } |
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508 | |
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509 | #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) |
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510 | /* Free any temporary space. */ |
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511 | if (gp->tmp_bp != NULL) |
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512 | free(gp->tmp_bp); |
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513 | |
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514 | #if defined(DEBUG) |
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515 | /* Close debugging file descriptor. */ |
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516 | if (gp->tracefp != NULL) |
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517 | (void)fclose(gp->tracefp); |
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518 | #endif |
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519 | #endif |
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520 | } |
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521 | |
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522 | /* |
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523 | * v_obsolete -- |
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524 | * Convert historic arguments into something getopt(3) will like. |
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525 | */ |
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526 | static int |
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527 | v_obsolete(name, argv) |
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528 | char *name, *argv[]; |
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529 | { |
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530 | size_t len; |
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531 | char *p; |
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532 | |
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533 | /* |
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534 | * Translate old style arguments into something getopt will like. |
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535 | * Make sure it's not text space memory, because ex modifies the |
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536 | * strings. |
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537 | * Change "+" into "-c$". |
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538 | * Change "+<anything else>" into "-c<anything else>". |
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539 | * Change "-" into "-s" |
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540 | * The c, T, t and w options take arguments so they can't be |
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541 | * special arguments. |
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542 | * |
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543 | * Stop if we find "--" as an argument, the user may want to edit |
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544 | * a file named "+foo". |
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545 | */ |
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546 | while (*++argv && strcmp(argv[0], "--")) |
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547 | if (argv[0][0] == '+') { |
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548 | if (argv[0][1] == '\0') { |
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549 | MALLOC_NOMSG(NULL, argv[0], char *, 4); |
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550 | if (argv[0] == NULL) |
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551 | goto nomem; |
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552 | (void)strcpy(argv[0], "-c$"); |
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553 | } else { |
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554 | p = argv[0]; |
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555 | len = strlen(argv[0]); |
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556 | MALLOC_NOMSG(NULL, argv[0], char *, len + 2); |
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557 | if (argv[0] == NULL) |
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558 | goto nomem; |
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559 | argv[0][0] = '-'; |
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560 | argv[0][1] = 'c'; |
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561 | (void)strcpy(argv[0] + 2, p + 1); |
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562 | } |
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563 | } else if (argv[0][0] == '-') |
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564 | if (argv[0][1] == '\0') { |
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565 | MALLOC_NOMSG(NULL, argv[0], char *, 3); |
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566 | if (argv[0] == NULL) { |
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567 | nomem: v_estr(name, errno, NULL); |
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568 | return (1); |
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569 | } |
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570 | (void)strcpy(argv[0], "-s"); |
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571 | } else |
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572 | if ((argv[0][1] == 'c' || argv[0][1] == 'T' || |
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573 | argv[0][1] == 't' || argv[0][1] == 'w') && |
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574 | argv[0][2] == '\0') |
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575 | ++argv; |
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576 | return (0); |
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577 | } |
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578 | |
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579 | #ifdef DEBUG |
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580 | static void |
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581 | attach(gp) |
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582 | GS *gp; |
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583 | { |
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584 | int fd; |
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585 | char ch; |
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586 | |
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587 | if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) { |
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588 | v_estr(gp->progname, errno, _PATH_TTY); |
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589 | return; |
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590 | } |
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591 | |
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592 | (void)printf("process %lu waiting, enter <CR> to continue: ", |
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593 | (u_long)getpid()); |
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594 | (void)fflush(stdout); |
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595 | |
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596 | do { |
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597 | if (read(fd, &ch, 1) != 1) { |
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598 | (void)close(fd); |
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599 | return; |
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600 | } |
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601 | } while (ch != '\n' && ch != '\r'); |
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602 | (void)close(fd); |
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603 | } |
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604 | #endif |
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605 | |
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606 | static void |
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607 | v_estr(name, eno, msg) |
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608 | char *name, *msg; |
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609 | int eno; |
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610 | { |
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611 | (void)fprintf(stderr, "%s", name); |
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612 | if (msg != NULL) |
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613 | (void)fprintf(stderr, ": %s", msg); |
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614 | if (eno) |
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615 | (void)fprintf(stderr, ": %s", strerror(errno)); |
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616 | (void)fprintf(stderr, "\n"); |
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617 | } |
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