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