1 /* $OpenBSD: main.c,v 1.84 2016/09/16 17:17:40 tedu Exp $ */ 2 3 /* This file is in the public domain. */ 4 5 /* 6 * Mainline. 7 */ 8 9 #include <sys/queue.h> 10 #include <err.h> 11 #include <limits.h> 12 #include <locale.h> 13 #include <signal.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 #include <unistd.h> 18 19 #include "def.h" 20 #include "kbd.h" 21 #include "funmap.h" 22 #include "macro.h" 23 24 int thisflag; /* flags, this command */ 25 int lastflag; /* flags, last command */ 26 int curgoal; /* goal column */ 27 int startrow; /* row to start */ 28 int doaudiblebell; /* audible bell toggle */ 29 int dovisiblebell; /* visible bell toggle */ 30 int dblspace; /* sentence end #spaces */ 31 struct buffer *curbp; /* current buffer */ 32 struct buffer *bheadp; /* BUFFER list head */ 33 struct mgwin *curwp; /* current window */ 34 struct mgwin *wheadp; /* MGWIN listhead */ 35 char pat[NPAT]; /* pattern */ 36 37 static void edinit(struct buffer *); 38 static __dead void usage(void); 39 40 extern char *__progname; 41 extern void closetags(void); 42 43 static __dead void 44 usage() 45 { 46 fprintf(stderr, "usage: %s [-nR] [-f mode] [+number] [file ...]\n", 47 __progname); 48 exit(1); 49 } 50 51 int 52 main(int argc, char **argv) 53 { 54 char *cp, *init_fcn_name = NULL; 55 PF init_fcn = NULL; 56 int o, i, nfiles; 57 int nobackups = 0, bro = 0; 58 struct buffer *bp = NULL; 59 60 if (pledge("stdio rpath wpath cpath fattr chown getpw tty proc exec", 61 NULL) == -1) 62 err(1, "pledge"); 63 64 while ((o = getopt(argc, argv, "nRf:")) != -1) 65 switch (o) { 66 case 'R': 67 bro = 1; 68 break; 69 case 'n': 70 nobackups = 1; 71 break; 72 case 'f': 73 if (init_fcn_name != NULL) 74 errx(1, "cannot specify more than one " 75 "initial function"); 76 init_fcn_name = optarg; 77 break; 78 default: 79 usage(); 80 } 81 argc -= optind; 82 argv += optind; 83 84 setlocale(LC_CTYPE, ""); 85 86 maps_init(); /* Keymaps and modes. */ 87 funmap_init(); /* Functions. */ 88 89 /* 90 * This is where we initialize standalone extensions that should 91 * be loaded dynamically sometime in the future. 92 */ 93 { 94 extern void grep_init(void); 95 extern void cmode_init(void); 96 extern void dired_init(void); 97 98 dired_init(); 99 grep_init(); 100 cmode_init(); 101 } 102 103 if (init_fcn_name && 104 (init_fcn = name_function(init_fcn_name)) == NULL) 105 errx(1, "Unknown function `%s'", init_fcn_name); 106 107 vtinit(); /* Virtual terminal. */ 108 dirinit(); /* Get current directory. */ 109 edinit(bp); /* Buffers, windows. */ 110 ttykeymapinit(); /* Symbols, bindings. */ 111 bellinit(); /* Audible and visible bell. */ 112 dblspace = 1; /* two spaces for sentence end. */ 113 114 /* 115 * doing update() before reading files causes the error messages from 116 * the file I/O show up on the screen. (and also an extra display of 117 * the mode line if there are files specified on the command line.) 118 */ 119 update(CMODE); 120 121 /* user startup file. */ 122 if ((cp = startupfile(NULL)) != NULL) 123 (void)load(cp); 124 125 /* 126 * Now ensure any default buffer modes from the startup file are 127 * given to any files opened when parsing the startup file. 128 * Note *scratch* will also be updated. 129 */ 130 for (bp = bheadp; bp != NULL; bp = bp->b_bufp) { 131 bp->b_flag = defb_flag; 132 for (i = 0; i <= defb_nmodes; i++) { 133 bp->b_modes[i] = defb_modes[i]; 134 } 135 } 136 137 /* Force FFOTHARG=1 so that this mode is enabled, not simply toggled */ 138 if (init_fcn) 139 init_fcn(FFOTHARG, 1); 140 141 if (nobackups) 142 makebkfile(FFARG, 0); 143 144 for (nfiles = 0, i = 0; i < argc; i++) { 145 if (argv[i][0] == '+' && strlen(argv[i]) >= 2) { 146 long long lval; 147 const char *errstr; 148 149 lval = strtonum(&argv[i][1], INT_MIN, INT_MAX, &errstr); 150 if (argv[i][1] == '\0' || errstr != NULL) 151 goto notnum; 152 startrow = lval; 153 } else { 154 notnum: 155 cp = adjustname(argv[i], FALSE); 156 if (cp != NULL) { 157 if (nfiles == 1) 158 splitwind(0, 1); 159 160 if (fisdir(cp) == TRUE) { 161 (void)do_dired(cp); 162 continue; 163 } 164 if ((curbp = findbuffer(cp)) == NULL) { 165 vttidy(); 166 errx(1, "Can't find current buffer!"); 167 } 168 (void)showbuffer(curbp, curwp, 0); 169 if (readin(cp) != TRUE) 170 killbuffer(curbp); 171 else { 172 /* Ensure enabled, not just toggled */ 173 if (init_fcn_name) 174 init_fcn(FFOTHARG, 1); 175 nfiles++; 176 } 177 if (bro) 178 curbp->b_flag |= BFREADONLY; 179 } 180 } 181 } 182 183 if (nfiles > 2) 184 listbuffers(0, 1); 185 186 /* fake last flags */ 187 thisflag = 0; 188 for (;;) { 189 if (epresf == KCLEAR) 190 eerase(); 191 if (epresf == TRUE) 192 epresf = KCLEAR; 193 if (winch_flag) { 194 do_redraw(0, 0, TRUE); 195 winch_flag = 0; 196 } 197 update(CMODE); 198 lastflag = thisflag; 199 thisflag = 0; 200 201 switch (doin()) { 202 case TRUE: 203 break; 204 case ABORT: 205 ewprintf("Quit"); 206 /* FALLTHRU */ 207 case FALSE: 208 default: 209 macrodef = FALSE; 210 } 211 } 212 } 213 214 /* 215 * Initialize default buffer and window. Default buffer is called *scratch*. 216 */ 217 static void 218 edinit(struct buffer *bp) 219 { 220 struct mgwin *wp; 221 222 bheadp = NULL; 223 bp = bfind("*scratch*", TRUE); /* Text buffer. */ 224 if (bp == NULL) 225 panic("edinit"); 226 227 wp = new_window(bp); 228 if (wp == NULL) 229 panic("edinit: Out of memory"); 230 231 curbp = bp; /* Current buffer. */ 232 wheadp = wp; 233 curwp = wp; 234 wp->w_wndp = NULL; /* Initialize window. */ 235 wp->w_linep = wp->w_dotp = bp->b_headp; 236 wp->w_ntrows = nrow - 2; /* 2 = mode, echo. */ 237 wp->w_rflag = WFMODE | WFFULL; /* Full. */ 238 } 239 240 /* 241 * Quit command. If an argument, always quit. Otherwise confirm if a buffer 242 * has been changed and not written out. Normally bound to "C-X C-C". 243 */ 244 /* ARGSUSED */ 245 int 246 quit(int f, int n) 247 { 248 int s; 249 250 if ((s = anycb(FALSE)) == ABORT) 251 return (ABORT); 252 if (s == FIOERR || s == UERROR) 253 return (FALSE); 254 if (s == FALSE 255 || eyesno("Modified buffers exist; really exit") == TRUE) { 256 vttidy(); 257 closetags(); 258 exit(0); 259 } 260 return (TRUE); 261 } 262 263 /* 264 * User abort. Should be called by any input routine that sees a C-g to abort 265 * whatever C-g is aborting these days. Currently does nothing. 266 */ 267 /* ARGSUSED */ 268 int 269 ctrlg(int f, int n) 270 { 271 return (ABORT); 272 } 273