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.
12 #include <sys/types.h>
13 #include <sys/queue.h>
16 #include <bitstring.h>
24 #include "../common/common.h"
28 * ex_read -- :read [file]
30 * Read from a file or utility.
33 * Historical vi wouldn't undo a filter read, for no apparent reason.
35 * PUBLIC: int ex_read(SCR *, EXCMD *);
38 ex_read(SCR *sp, EXCMD *cmdp)
40 enum { R_ARG, R_EXPANDARG, R_FILTER } which;
58 * 0 args: read the current pathname.
59 * 1 args: check for "read !arg".
66 arg = cmdp->argv[0]->bp;
67 arglen = cmdp->argv[0]->len;
73 /* Secure means no shell access. */
74 if (O_ISSET(sp, O_SECURE)) {
75 ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F);
86 /* Load a temporary file if no file being edited. */
88 if ((frp = file_add(sp, NULL)) == NULL)
90 if (file_init(sp, frp, NULL, 0))
97 * File name and bang expand the user's argument. If
98 * we don't get an additional argument, it's illegal.
101 if (argv_exp1(sp, cmdp, arg, arglen, 1))
103 if (argc == cmdp->argc) {
104 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
107 argc = cmdp->argc - 1;
109 /* Set the last bang command. */
111 free(exp->lastbcomm);
112 if ((exp->lastbcomm =
113 v_wstrdup(sp, cmdp->argv[argc]->bp,
114 cmdp->argv[argc]->len)) == NULL) {
115 msgq(sp, M_SYSERR, NULL);
120 * Vi redisplayed the user's argument if it changed, ex
121 * always displayed a !, plus the user's argument if it
124 if (F_ISSET(sp, SC_VI)) {
125 if (F_ISSET(cmdp, E_MODIFY))
126 (void)vs_update(sp, "!", cmdp->argv[argc]->bp);
128 if (F_ISSET(cmdp, E_MODIFY))
130 "!"WS"\n", cmdp->argv[argc]->bp);
132 (void)ex_puts(sp, "!\n");
137 * Historically, filter reads as the first ex command didn't
138 * wait for the user. If SC_SCR_EXWROTE not already set, set
139 * the don't-wait flag.
141 if (!F_ISSET(sp, SC_SCR_EXWROTE))
142 F_SET(sp, SC_EX_WAIT_NO);
145 * Switch into ex canonical mode. The reason to restore the
146 * original terminal modes for read filters is so that users
147 * can do things like ":r! cat /dev/tty".
150 * We do not output an extra <newline>, so that we don't touch
151 * the screen on a normal read.
153 if (F_ISSET(sp, SC_VI)) {
154 if (gp->scr_screen(sp, SC_EX)) {
155 ex_wemsg(sp, cmdp->cmd->name, EXM_NOCANON_F);
160 * Historically, the read command doesn't switch to
161 * the alternate X11 xterm screen, if doing a filter
162 * read -- don't set SA_ALTERNATE.
164 F_SET(sp, SC_SCR_EX | SC_SCR_EXWROTE);
167 if (ex_filter(sp, cmdp, &cmdp->addr1,
168 NULL, &rm, cmdp->argv[argc]->bp, FILTER_READ))
171 /* The filter version of read set the autoprint flag. */
172 F_SET(cmdp, E_AUTOPRINT);
175 * If in vi mode, move to the first nonblank. Might have
176 * switched into ex mode, so saved the original SC_VI value.
179 if (F_ISSET(sp, SC_VI)) {
181 (void)nonblank(sp, sp->lno, &sp->cno);
185 name = sp->frp->name;
188 if (argv_exp2(sp, cmdp, arg, arglen))
191 * 0 args: impossible.
192 * 1 args: impossible (I hope).
194 * >2 args: object, too many args.
196 * The 1 args case depends on the argv_sexp() function refusing
197 * to return success without at least one non-blank character.
199 switch (cmdp->argc) {
205 INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len + 1,
209 * Historically, the read and write commands renamed
210 * "unnamed" files, or, if the file had a name, set
211 * the alternate file name.
213 if (F_ISSET(sp->frp, FR_TMPFILE) &&
214 !F_ISSET(sp->frp, FR_EXNAMED)) {
215 if ((p = strdup(name)) != NULL) {
220 * The file has a real name, it's no longer a
221 * temporary, clear the temporary file flags.
223 F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE);
224 F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED);
226 /* Notify the screen. */
227 (void)sp->gp->scr_rename(sp, sp->frp->name, 1);
228 name = sp->frp->name;
230 set_alt_name(sp, name);
235 ex_wemsg(sp, cmdp->argv[0]->bp, EXM_FILECOUNT);
244 * Historically, vi did not permit reads from non-regular files, nor
245 * did it distinguish between "read !" and "read!", so there was no
246 * way to "force" it. We permit reading from named pipes too, since
247 * they didn't exist when the original implementation of vi was done
248 * and they seem a reasonable addition.
250 if ((fp = fopen(name, "r")) == NULL || fstat(fileno(fp), &sb)) {
251 msgq_str(sp, M_SYSERR, name, "%s");
254 if (!S_ISFIFO(sb.st_mode) && !S_ISREG(sb.st_mode)) {
257 "145|Only regular files and named pipes may be read");
261 /* Try and get a lock. */
262 if (file_lock(sp, NULL, fileno(fp), 0) == LOCK_UNAVAIL)
263 msgq(sp, M_ERR, "146|%s: read lock was unavailable", name);
265 rval = ex_readfp(sp, name, fp, &cmdp->addr1, &nlines, 0);
268 * In vi, set the cursor to the first line read in, if anything read
269 * in, otherwise, the address. (Historic vi set it to the line after
270 * the address regardless, but since that line may not exist we don't
273 * In ex, set the cursor to the last line read in, if anything read in,
274 * otherwise, the address.
276 if (F_ISSET(sp, SC_VI)) {
277 sp->lno = cmdp->addr1.lno;
281 sp->lno = cmdp->addr1.lno + nlines;
287 * Read lines into the file.
289 * PUBLIC: int ex_readfp(SCR *, char *, FILE *, MARK *, recno_t *, int);
292 ex_readfp(SCR *sp, char *name, FILE *fp, MARK *fm, recno_t *nlinesp, int silent)
298 u_long ccnt; /* XXX: can't print off_t portably. */
308 * Add in the lines from the output. Insertion starts at the line
309 * following the address.
313 p = "147|Reading...";
314 for (lno = fm->lno; !ex_getline(sp, fp, &len); ++lno, ++lcnt) {
315 if ((lcnt + 1) % INTERRUPT_CHECK == 0) {
320 p == NULL ? BUSY_UPDATE : BUSY_ON);
324 FILE2INT5(sp, exp->ibcw, exp->ibp, len, wp, wlen);
325 if (db_append(sp, 1, lno, wp, wlen))
330 if (ferror(fp) || fclose(fp))
333 /* Return the number of lines read in. */
338 p = msg_print(sp, name, &nf);
340 "148|%s: %lu lines, %lu characters", p,
343 FREE_SPACE(sp, p, 0);
348 err: msgq_str(sp, M_SYSERR, name, "%s");
354 gp->scr_busy(sp, NULL, BUSY_OFF);