1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "$Id: ex_write.c,v 10.41 2011/12/02 01:07:06 zy Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/stat.h> 19 20 #include <bitstring.h> 21 #include <ctype.h> 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <limits.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include <strings.h> 29 #include <unistd.h> 30 31 #include "../common/common.h" 32 33 enum which {WN, WQ, WRITE, XIT}; 34 static int exwr __P((SCR *, EXCMD *, enum which)); 35 36 /* 37 * ex_wn -- :wn[!] [>>] [file] 38 * Write to a file and switch to the next one. 39 * 40 * PUBLIC: int ex_wn __P((SCR *, EXCMD *)); 41 */ 42 int 43 ex_wn(SCR *sp, EXCMD *cmdp) 44 { 45 if (exwr(sp, cmdp, WN)) 46 return (1); 47 if (file_m3(sp, 0)) 48 return (1); 49 50 /* The file name isn't a new file to edit. */ 51 cmdp->argc = 0; 52 53 return (ex_next(sp, cmdp)); 54 } 55 56 /* 57 * ex_wq -- :wq[!] [>>] [file] 58 * Write to a file and quit. 59 * 60 * PUBLIC: int ex_wq __P((SCR *, EXCMD *)); 61 */ 62 int 63 ex_wq(SCR *sp, EXCMD *cmdp) 64 { 65 int force; 66 67 if (exwr(sp, cmdp, WQ)) 68 return (1); 69 if (file_m3(sp, 0)) 70 return (1); 71 72 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 73 74 if (ex_ncheck(sp, force)) 75 return (1); 76 77 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 78 return (0); 79 } 80 81 /* 82 * ex_write -- :write[!] [>>] [file] 83 * :write [!] [cmd] 84 * Write to a file. 85 * 86 * PUBLIC: int ex_write __P((SCR *, EXCMD *)); 87 */ 88 int 89 ex_write(SCR *sp, EXCMD *cmdp) 90 { 91 return (exwr(sp, cmdp, WRITE)); 92 } 93 94 95 /* 96 * ex_xit -- :x[it]! [file] 97 * Write out any modifications and quit. 98 * 99 * PUBLIC: int ex_xit __P((SCR *, EXCMD *)); 100 */ 101 int 102 ex_xit(SCR *sp, EXCMD *cmdp) 103 { 104 int force; 105 106 NEEDFILE(sp, cmdp); 107 108 if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) 109 return (1); 110 if (file_m3(sp, 0)) 111 return (1); 112 113 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 114 115 if (ex_ncheck(sp, force)) 116 return (1); 117 118 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 119 return (0); 120 } 121 122 /* 123 * exwr -- 124 * The guts of the ex write commands. 125 */ 126 static int 127 exwr(SCR *sp, EXCMD *cmdp, enum which cmd) 128 { 129 MARK rm; 130 int flags; 131 char *name; 132 CHAR_T *p = NULL; 133 size_t nlen; 134 char *n; 135 int rc; 136 EX_PRIVATE *exp; 137 138 NEEDFILE(sp, cmdp); 139 140 /* All write commands can have an associated '!'. */ 141 LF_INIT(FS_POSSIBLE); 142 if (FL_ISSET(cmdp->iflags, E_C_FORCE)) 143 LF_SET(FS_FORCE); 144 145 /* Skip any leading whitespace. */ 146 if (cmdp->argc != 0) 147 for (p = cmdp->argv[0]->bp; *p != '\0' && cmdskip(*p); ++p); 148 149 /* If "write !" it's a pipe to a utility. */ 150 if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { 151 /* Secure means no shell access. */ 152 if (O_ISSET(sp, O_SECURE)) { 153 ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F); 154 return (1); 155 } 156 157 /* Expand the argument. */ 158 for (++p; *p && cmdskip(*p); ++p); 159 if (*p == '\0') { 160 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 161 return (1); 162 } 163 if (argv_exp1(sp, cmdp, p, STRLEN(p), 1)) 164 return (1); 165 166 /* Set the last bang command */ 167 exp = EXP(sp); 168 free(exp->lastbcomm); 169 exp->lastbcomm = v_wstrdup(sp, cmdp->argv[1]->bp, 170 cmdp->argv[1]->len); 171 172 /* 173 * Historically, vi waited after a write filter even if there 174 * wasn't any output from the command. People complained when 175 * nvi waited only if there was output, wanting the visual cue 176 * that the program hadn't written anything. 177 */ 178 F_SET(sp, SC_EX_WAIT_YES); 179 180 /* 181 * !!! 182 * Ignore the return cursor position, the cursor doesn't 183 * move. 184 */ 185 if (ex_filter(sp, cmdp, &cmdp->addr1, 186 &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE)) 187 return (1); 188 189 /* Ex terminates with a bang, even if the command fails. */ 190 if (!F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_EX_SILENT)) 191 (void)ex_puts(sp, "!\n"); 192 193 return (0); 194 } 195 196 /* Set the FS_ALL flag if we're writing the entire file. */ 197 if (cmdp->addr1.lno <= 1 && !db_exist(sp, cmdp->addr2.lno + 1)) 198 LF_SET(FS_ALL); 199 200 /* If "write >>" it's an append to a file. */ 201 if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') { 202 LF_SET(FS_APPEND); 203 204 /* Skip ">>" and whitespace. */ 205 for (p += 2; *p && cmdskip(*p); ++p); 206 } 207 208 /* If no other arguments, just write the file back. */ 209 if (cmdp->argc == 0 || *p == '\0') 210 return (file_write(sp, 211 &cmdp->addr1, &cmdp->addr2, NULL, flags)); 212 213 /* Build an argv so we get an argument count and file expansion. */ 214 if (argv_exp2(sp, cmdp, p, STRLEN(p))) 215 return (1); 216 217 /* 218 * 0 args: impossible. 219 * 1 args: impossible (I hope). 220 * 2 args: read it. 221 * >2 args: object, too many args. 222 * 223 * The 1 args case depends on the argv_sexp() function refusing 224 * to return success without at least one non-blank character. 225 */ 226 switch (cmdp->argc) { 227 case 0: 228 case 1: 229 abort(); 230 /* NOTREACHED */ 231 case 2: 232 INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len+1, 233 n, nlen); 234 name = v_strdup(sp, n, nlen - 1); 235 236 /* 237 * !!! 238 * Historically, the read and write commands renamed 239 * "unnamed" files, or, if the file had a name, set 240 * the alternate file name. 241 */ 242 if (F_ISSET(sp->frp, FR_TMPFILE) && 243 !F_ISSET(sp->frp, FR_EXNAMED)) { 244 if ((n = v_strdup(sp, name, nlen - 1)) != NULL) { 245 free(sp->frp->name); 246 sp->frp->name = n; 247 } 248 /* 249 * The file has a real name, it's no longer a 250 * temporary, clear the temporary file flags. 251 * 252 * !!! 253 * If we're writing the whole file, FR_NAMECHANGE 254 * will be cleared by the write routine -- this is 255 * historic practice. 256 */ 257 F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 258 F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 259 260 /* Notify the screen. */ 261 (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 262 } else 263 set_alt_name(sp, name); 264 break; 265 default: 266 INT2CHAR(sp, p, STRLEN(p) + 1, n, nlen); 267 ex_emsg(sp, n, EXM_FILECOUNT); 268 return (1); 269 } 270 271 rc = file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags); 272 273 free(name); 274 275 return rc; 276 } 277 278 /* 279 * ex_writefp -- 280 * Write a range of lines to a FILE *. 281 * 282 * PUBLIC: int ex_writefp __P((SCR *, 283 * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int)); 284 */ 285 int 286 ex_writefp(SCR *sp, char *name, FILE *fp, MARK *fm, MARK *tm, u_long *nlno, u_long *nch, int silent) 287 { 288 struct stat sb; 289 GS *gp; 290 u_long ccnt; /* XXX: can't print off_t portably. */ 291 recno_t fline, tline, lcnt; 292 size_t len; 293 int rval; 294 char *msg; 295 CHAR_T *p; 296 char *f; 297 size_t flen; 298 int isutf16; 299 300 gp = sp->gp; 301 fline = fm->lno; 302 tline = tm->lno; 303 304 if (nlno != NULL) { 305 *nch = 0; 306 *nlno = 0; 307 } 308 309 /* 310 * The vi filter code has multiple processes running simultaneously, 311 * and one of them calls ex_writefp(). The "unsafe" function calls 312 * in this code are to db_get() and msgq(). Db_get() is safe, see 313 * the comment in ex_filter.c:ex_filter() for details. We don't call 314 * msgq if the multiple process bit in the EXF is set. 315 * 316 * !!! 317 * Historic vi permitted files of 0 length to be written. However, 318 * since the way vi got around dealing with "empty" files was to 319 * always have a line in the file no matter what, it wrote them as 320 * files of a single, empty line. We write empty files. 321 * 322 * "Alex, I'll take vi trivia for $1000." 323 */ 324 ccnt = 0; 325 lcnt = 0; 326 msg = "253|Writing..."; 327 328 if (O_ISSET(sp, O_FILEENCODING)) { 329 isutf16 = !strncasecmp(O_STR(sp, O_FILEENCODING), "utf-16", 6); 330 isutf16 += !strncasecmp(O_STR(sp, O_FILEENCODING), "utf-16le", 8); 331 } else isutf16 = 0; 332 333 if (tline != 0) { 334 if (isutf16 == 1 && fwrite("\xfe\xff", 1, 2, fp) != 2) 335 goto err; 336 if (isutf16 == 2 && fwrite("\xff\xfe", 1, 2, fp) != 2) 337 goto err; 338 for (; fline <= tline; ++fline, ++lcnt) { 339 /* Caller has to provide any interrupt message. */ 340 if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 341 if (INTERRUPTED(sp)) 342 break; 343 if (!silent) { 344 gp->scr_busy(sp, msg, msg == NULL ? 345 BUSY_UPDATE : BUSY_ON); 346 msg = NULL; 347 } 348 } 349 if (db_get(sp, fline, DBG_FATAL, &p, &len)) 350 goto err; 351 INT2FILE(sp, p, len, f, flen); 352 if (fwrite(f, 1, flen, fp) != flen) 353 goto err; 354 ccnt += len; 355 /* UTF-16 w/o BOM is big-endian */ 356 switch (isutf16) { 357 case 1: /* UTF-16BE */ 358 if (fwrite("\0\x0a", 1, 2, fp) != 2) 359 goto done; 360 break; 361 case 2: /* UTF-16LE */ 362 if (fwrite("\x0a\0", 1, 2, fp) != 2) 363 goto done; 364 break; 365 default: 366 if (putc('\n', fp) != '\n') 367 goto done; 368 } 369 ++ccnt; 370 } 371 } 372 373 done: if (fflush(fp)) 374 goto err; 375 /* 376 * XXX 377 * I don't trust NFS -- check to make sure that we're talking to 378 * a regular file and sync so that NFS is forced to flush. 379 */ 380 if (!fstat(fileno(fp), &sb) && 381 S_ISREG(sb.st_mode) && fsync(fileno(fp))) 382 goto err; 383 384 if (fclose(fp)) 385 goto err; 386 387 rval = 0; 388 if (0) { 389 err: if (!F_ISSET(sp->ep, F_MULTILOCK)) 390 msgq_str(sp, M_SYSERR, name, "%s"); 391 (void)fclose(fp); 392 rval = 1; 393 } 394 395 if (!silent) 396 gp->scr_busy(sp, NULL, BUSY_OFF); 397 398 /* Report the possibly partial transfer. */ 399 if (nlno != NULL) { 400 *nch = ccnt; 401 *nlno = lcnt; 402 } 403 return (rval); 404 } 405