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[] = "@(#)ex_write.c 10.30 (Berkeley) 7/12/96"; 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 <unistd.h> 29 30 #include "../common/common.h" 31 32 enum which {WN, WQ, WRITE, XIT}; 33 static int exwr __P((SCR *, EXCMD *, enum which)); 34 35 /* 36 * ex_wn -- :wn[!] [>>] [file] 37 * Write to a file and switch to the next one. 38 * 39 * PUBLIC: int ex_wn __P((SCR *, EXCMD *)); 40 */ 41 int 42 ex_wn(sp, cmdp) 43 SCR *sp; 44 EXCMD *cmdp; 45 { 46 if (exwr(sp, cmdp, WN)) 47 return (1); 48 if (file_m3(sp, 0)) 49 return (1); 50 51 /* The file name isn't a new file to edit. */ 52 cmdp->argc = 0; 53 54 return (ex_next(sp, cmdp)); 55 } 56 57 /* 58 * ex_wq -- :wq[!] [>>] [file] 59 * Write to a file and quit. 60 * 61 * PUBLIC: int ex_wq __P((SCR *, EXCMD *)); 62 */ 63 int 64 ex_wq(sp, cmdp) 65 SCR *sp; 66 EXCMD *cmdp; 67 { 68 int force; 69 70 if (exwr(sp, cmdp, WQ)) 71 return (1); 72 if (file_m3(sp, 0)) 73 return (1); 74 75 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 76 77 if (ex_ncheck(sp, force)) 78 return (1); 79 80 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 81 return (0); 82 } 83 84 /* 85 * ex_write -- :write[!] [>>] [file] 86 * :write [!] [cmd] 87 * Write to a file. 88 * 89 * PUBLIC: int ex_write __P((SCR *, EXCMD *)); 90 */ 91 int 92 ex_write(sp, cmdp) 93 SCR *sp; 94 EXCMD *cmdp; 95 { 96 return (exwr(sp, cmdp, WRITE)); 97 } 98 99 100 /* 101 * ex_xit -- :x[it]! [file] 102 * Write out any modifications and quit. 103 * 104 * PUBLIC: int ex_xit __P((SCR *, EXCMD *)); 105 */ 106 int 107 ex_xit(sp, cmdp) 108 SCR *sp; 109 EXCMD *cmdp; 110 { 111 int force; 112 113 NEEDFILE(sp, cmdp); 114 115 if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) 116 return (1); 117 if (file_m3(sp, 0)) 118 return (1); 119 120 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 121 122 if (ex_ncheck(sp, force)) 123 return (1); 124 125 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 126 return (0); 127 } 128 129 /* 130 * exwr -- 131 * The guts of the ex write commands. 132 */ 133 static int 134 exwr(sp, cmdp, cmd) 135 SCR *sp; 136 EXCMD *cmdp; 137 enum which cmd; 138 { 139 MARK rm; 140 int flags; 141 char *name, *p; 142 143 NEEDFILE(sp, cmdp); 144 145 /* All write commands can have an associated '!'. */ 146 LF_INIT(FS_POSSIBLE); 147 if (FL_ISSET(cmdp->iflags, E_C_FORCE)) 148 LF_SET(FS_FORCE); 149 150 /* Skip any leading whitespace. */ 151 if (cmdp->argc != 0) 152 for (p = cmdp->argv[0]->bp; *p != '\0' && isblank(*p); ++p); 153 154 /* If "write !" it's a pipe to a utility. */ 155 if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { 156 /* Secure means no shell access. */ 157 if (O_ISSET(sp, O_SECURE)) { 158 ex_emsg(sp, cmdp->cmd->name, EXM_SECURE_F); 159 return (1); 160 } 161 162 /* Expand the argument. */ 163 for (++p; *p && isblank(*p); ++p); 164 if (*p == '\0') { 165 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 166 return (1); 167 } 168 if (argv_exp1(sp, cmdp, p, strlen(p), 1)) 169 return (1); 170 171 /* 172 * Historically, vi waited after a write filter even if there 173 * wasn't any output from the command. People complained when 174 * nvi waited only if there was output, wanting the visual cue 175 * that the program hadn't written anything. 176 */ 177 F_SET(sp, SC_EX_WAIT_YES); 178 179 /* 180 * !!! 181 * Ignore the return cursor position, the cursor doesn't 182 * move. 183 */ 184 if (ex_filter(sp, cmdp, &cmdp->addr1, 185 &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE)) 186 return (1); 187 188 /* Ex terminates with a bang, even if the command fails. */ 189 if (!F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_EX_SILENT)) 190 (void)ex_puts(sp, "!\n"); 191 192 return (0); 193 } 194 195 /* Set the FS_ALL flag if we're writing the entire file. */ 196 if (cmdp->addr1.lno <= 1 && !db_exist(sp, cmdp->addr2.lno + 1)) 197 LF_SET(FS_ALL); 198 199 /* If "write >>" it's an append to a file. */ 200 if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') { 201 LF_SET(FS_APPEND); 202 203 /* Skip ">>" and whitespace. */ 204 for (p += 2; *p && isblank(*p); ++p); 205 } 206 207 /* If no other arguments, just write the file back. */ 208 if (cmdp->argc == 0 || *p == '\0') 209 return (file_write(sp, 210 &cmdp->addr1, &cmdp->addr2, NULL, flags)); 211 212 /* Build an argv so we get an argument count and file expansion. */ 213 if (argv_exp2(sp, cmdp, p, strlen(p))) 214 return (1); 215 216 /* 217 * 0 args: impossible. 218 * 1 args: impossible (I hope). 219 * 2 args: read it. 220 * >2 args: object, too many args. 221 * 222 * The 1 args case depends on the argv_sexp() function refusing 223 * to return success without at least one non-blank character. 224 */ 225 switch (cmdp->argc) { 226 case 0: 227 case 1: 228 abort(); 229 /* NOTREACHED */ 230 case 2: 231 name = cmdp->argv[1]->bp; 232 233 /* 234 * !!! 235 * Historically, the read and write commands renamed 236 * "unnamed" files, or, if the file had a name, set 237 * the alternate file name. 238 */ 239 if (F_ISSET(sp->frp, FR_TMPFILE) && 240 !F_ISSET(sp->frp, FR_EXNAMED)) { 241 if ((p = v_strdup(sp, 242 cmdp->argv[1]->bp, cmdp->argv[1]->len)) != NULL) { 243 free(sp->frp->name); 244 sp->frp->name = p; 245 } 246 /* 247 * The file has a real name, it's no longer a 248 * temporary, clear the temporary file flags. 249 * 250 * !!! 251 * If we're writing the whole file, FR_NAMECHANGE 252 * will be cleared by the write routine -- this is 253 * historic practice. 254 */ 255 F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 256 F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 257 258 /* Notify the screen. */ 259 (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 260 } else 261 set_alt_name(sp, name); 262 break; 263 default: 264 ex_emsg(sp, p, EXM_FILECOUNT); 265 return (1); 266 } 267 268 return (file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags)); 269 } 270 271 /* 272 * ex_writefp -- 273 * Write a range of lines to a FILE *. 274 * 275 * PUBLIC: int ex_writefp __P((SCR *, 276 * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int)); 277 */ 278 int 279 ex_writefp(sp, name, fp, fm, tm, nlno, nch, silent) 280 SCR *sp; 281 char *name; 282 FILE *fp; 283 MARK *fm, *tm; 284 u_long *nlno, *nch; 285 int silent; 286 { 287 struct stat sb; 288 GS *gp; 289 u_long ccnt; /* XXX: can't print off_t portably. */ 290 recno_t fline, tline, lcnt; 291 size_t len; 292 int rval; 293 char *msg, *p; 294 295 gp = sp->gp; 296 fline = fm->lno; 297 tline = tm->lno; 298 299 if (nlno != NULL) { 300 *nch = 0; 301 *nlno = 0; 302 } 303 304 /* 305 * The vi filter code has multiple processes running simultaneously, 306 * and one of them calls ex_writefp(). The "unsafe" function calls 307 * in this code are to db_get() and msgq(). Db_get() is safe, see 308 * the comment in ex_filter.c:ex_filter() for details. We don't call 309 * msgq if the multiple process bit in the EXF is set. 310 * 311 * !!! 312 * Historic vi permitted files of 0 length to be written. However, 313 * since the way vi got around dealing with "empty" files was to 314 * always have a line in the file no matter what, it wrote them as 315 * files of a single, empty line. We write empty files. 316 * 317 * "Alex, I'll take vi trivia for $1000." 318 */ 319 ccnt = 0; 320 lcnt = 0; 321 msg = "253|Writing..."; 322 if (tline != 0) 323 for (; fline <= tline; ++fline, ++lcnt) { 324 /* Caller has to provide any interrupt message. */ 325 if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 326 if (INTERRUPTED(sp)) 327 break; 328 if (!silent) { 329 gp->scr_busy(sp, msg, msg == NULL ? 330 BUSY_UPDATE : BUSY_ON); 331 msg = NULL; 332 } 333 } 334 if (db_get(sp, fline, DBG_FATAL, &p, &len)) 335 goto err; 336 if (fwrite(p, 1, len, fp) != len) 337 goto err; 338 ccnt += len; 339 if (putc('\n', fp) != '\n') 340 break; 341 ++ccnt; 342 } 343 344 if (fflush(fp)) 345 goto err; 346 /* 347 * XXX 348 * I don't trust NFS -- check to make sure that we're talking to 349 * a regular file and sync so that NFS is forced to flush. 350 */ 351 if (!fstat(fileno(fp), &sb) && 352 S_ISREG(sb.st_mode) && fsync(fileno(fp))) 353 goto err; 354 355 if (fclose(fp)) 356 goto err; 357 358 rval = 0; 359 if (0) { 360 err: if (!F_ISSET(sp->ep, F_MULTILOCK)) 361 msgq_str(sp, M_SYSERR, name, "%s"); 362 (void)fclose(fp); 363 rval = 1; 364 } 365 366 if (!silent) 367 gp->scr_busy(sp, NULL, BUSY_OFF); 368 369 /* Report the possibly partial transfer. */ 370 if (nlno != NULL) { 371 *nch = ccnt; 372 *nlno = lcnt; 373 } 374 return (rval); 375 } 376