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.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid[] = "$Id: ex_write.c,v 10.41 2011/12/02 01:07:06 zy Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
31 #include "../common/common.h"
33 enum which {WN, WQ, WRITE, XIT};
34 static int exwr __P((SCR *, EXCMD *, enum which));
37 * ex_wn -- :wn[!] [>>] [file]
38 * Write to a file and switch to the next one.
40 * PUBLIC: int ex_wn __P((SCR *, EXCMD *));
43 ex_wn(SCR *sp, EXCMD *cmdp)
45 if (exwr(sp, cmdp, WN))
50 /* The file name isn't a new file to edit. */
53 return (ex_next(sp, cmdp));
57 * ex_wq -- :wq[!] [>>] [file]
58 * Write to a file and quit.
60 * PUBLIC: int ex_wq __P((SCR *, EXCMD *));
63 ex_wq(SCR *sp, EXCMD *cmdp)
67 if (exwr(sp, cmdp, WQ))
72 force = FL_ISSET(cmdp->iflags, E_C_FORCE);
74 if (ex_ncheck(sp, force))
77 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT);
82 * ex_write -- :write[!] [>>] [file]
86 * PUBLIC: int ex_write __P((SCR *, EXCMD *));
89 ex_write(SCR *sp, EXCMD *cmdp)
91 return (exwr(sp, cmdp, WRITE));
96 * ex_xit -- :x[it]! [file]
97 * Write out any modifications and quit.
99 * PUBLIC: int ex_xit __P((SCR *, EXCMD *));
102 ex_xit(SCR *sp, EXCMD *cmdp)
108 if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT))
113 force = FL_ISSET(cmdp->iflags, E_C_FORCE);
115 if (ex_ncheck(sp, force))
118 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT);
124 * The guts of the ex write commands.
127 exwr(SCR *sp, EXCMD *cmdp, enum which cmd)
140 /* All write commands can have an associated '!'. */
141 LF_INIT(FS_POSSIBLE);
142 if (FL_ISSET(cmdp->iflags, E_C_FORCE))
145 /* Skip any leading whitespace. */
147 for (p = cmdp->argv[0]->bp; *p != '\0' && cmdskip(*p); ++p);
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);
157 /* Expand the argument. */
158 for (++p; *p && cmdskip(*p); ++p);
160 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
163 if (argv_exp1(sp, cmdp, p, STRLEN(p), 1))
166 /* Set the last bang command */
168 free(exp->lastbcomm);
169 exp->lastbcomm = v_wstrdup(sp, cmdp->argv[1]->bp,
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.
178 F_SET(sp, SC_EX_WAIT_YES);
182 * Ignore the return cursor position, the cursor doesn't
185 if (ex_filter(sp, cmdp, &cmdp->addr1,
186 &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE))
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");
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))
200 /* If "write >>" it's an append to a file. */
201 if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') {
204 /* Skip ">>" and whitespace. */
205 for (p += 2; *p && cmdskip(*p); ++p);
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));
213 /* Build an argv so we get an argument count and file expansion. */
214 if (argv_exp2(sp, cmdp, p, STRLEN(p)))
218 * 0 args: impossible.
219 * 1 args: impossible (I hope).
221 * >2 args: object, too many args.
223 * The 1 args case depends on the argv_sexp() function refusing
224 * to return success without at least one non-blank character.
226 switch (cmdp->argc) {
232 INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len+1,
234 name = v_strdup(sp, n, nlen - 1);
238 * Historically, the read and write commands renamed
239 * "unnamed" files, or, if the file had a name, set
240 * the alternate file name.
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) {
249 * The file has a real name, it's no longer a
250 * temporary, clear the temporary file flags.
253 * If we're writing the whole file, FR_NAMECHANGE
254 * will be cleared by the write routine -- this is
257 F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE);
258 F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED);
260 /* Notify the screen. */
261 (void)sp->gp->scr_rename(sp, sp->frp->name, 1);
263 set_alt_name(sp, name);
266 INT2CHAR(sp, p, STRLEN(p) + 1, n, nlen);
267 ex_emsg(sp, n, EXM_FILECOUNT);
271 rc = file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags);
280 * Write a range of lines to a FILE *.
282 * PUBLIC: int ex_writefp __P((SCR *,
283 * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int));
286 ex_writefp(SCR *sp, char *name, FILE *fp, MARK *fm, MARK *tm, u_long *nlno, u_long *nch, int silent)
290 u_long ccnt; /* XXX: can't print off_t portably. */
291 recno_t fline, tline, lcnt;
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.
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.
322 * "Alex, I'll take vi trivia for $1000."
326 msg = "253|Writing...";
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);
334 if (isutf16 == 1 && fwrite("\xfe\xff", 1, 2, fp) != 2)
336 if (isutf16 == 2 && fwrite("\xff\xfe", 1, 2, fp) != 2)
338 for (; fline <= tline; ++fline, ++lcnt) {
339 /* Caller has to provide any interrupt message. */
340 if ((lcnt + 1) % INTERRUPT_CHECK == 0) {
344 gp->scr_busy(sp, msg, msg == NULL ?
345 BUSY_UPDATE : BUSY_ON);
349 if (db_get(sp, fline, DBG_FATAL, &p, &len))
351 INT2FILE(sp, p, len, f, flen);
352 if (fwrite(f, 1, flen, fp) != flen)
355 /* UTF-16 w/o BOM is big-endian */
357 case 1: /* UTF-16BE */
358 if (fwrite("\0\x0a", 1, 2, fp) != 2)
361 case 2: /* UTF-16LE */
362 if (fwrite("\x0a\0", 1, 2, fp) != 2)
366 if (putc('\n', fp) != '\n')
373 done: if (fflush(fp))
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.
380 if (!fstat(fileno(fp), &sb) &&
381 S_ISREG(sb.st_mode) && fsync(fileno(fp)))
391 err: if (!F_ISSET(sp->ep, F_MULTILOCK))
392 msgq_str(sp, M_SYSERR, name, "%s");
399 gp->scr_busy(sp, NULL, BUSY_OFF);
401 /* Report the possibly partial transfer. */