| 1 | /* $NetBSD: input.c,v 1.39 2003/08/07 09:05:32 agc Exp $ */
|
|---|
| 2 |
|
|---|
| 3 | /*-
|
|---|
| 4 | * Copyright (c) 1991, 1993
|
|---|
| 5 | * The Regents of the University of California. All rights reserved.
|
|---|
| 6 | *
|
|---|
| 7 | * This code is derived from software contributed to Berkeley by
|
|---|
| 8 | * Kenneth Almquist.
|
|---|
| 9 | *
|
|---|
| 10 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 11 | * modification, are permitted provided that the following conditions
|
|---|
| 12 | * are met:
|
|---|
| 13 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 14 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 15 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 16 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 17 | * documentation and/or other materials provided with the distribution.
|
|---|
| 18 | * 3. Neither the name of the University nor the names of its contributors
|
|---|
| 19 | * may be used to endorse or promote products derived from this software
|
|---|
| 20 | * without specific prior written permission.
|
|---|
| 21 | *
|
|---|
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 32 | * SUCH DAMAGE.
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #if 0
|
|---|
| 36 | #ifndef lint
|
|---|
| 37 | static char sccsid[] = "@(#)input.c 8.3 (Berkeley) 6/9/95";
|
|---|
| 38 | #else
|
|---|
| 39 | __RCSID("$NetBSD: input.c,v 1.39 2003/08/07 09:05:32 agc Exp $");
|
|---|
| 40 | #endif /* not lint */
|
|---|
| 41 | #endif
|
|---|
| 42 |
|
|---|
| 43 | #include <stdio.h> /* defines BUFSIZ */
|
|---|
| 44 | #include <errno.h>
|
|---|
| 45 | #include <stdlib.h>
|
|---|
| 46 | #include <string.h>
|
|---|
| 47 |
|
|---|
| 48 | /*
|
|---|
| 49 | * This file implements the input routines used by the parser.
|
|---|
| 50 | */
|
|---|
| 51 |
|
|---|
| 52 | #include "shell.h"
|
|---|
| 53 | #include "redir.h"
|
|---|
| 54 | #include "syntax.h"
|
|---|
| 55 | #include "input.h"
|
|---|
| 56 | #include "output.h"
|
|---|
| 57 | #include "options.h"
|
|---|
| 58 | #include "memalloc.h"
|
|---|
| 59 | #include "error.h"
|
|---|
| 60 | #include "alias.h"
|
|---|
| 61 | #include "parser.h"
|
|---|
| 62 | #include "myhistedit.h"
|
|---|
| 63 | #include "shinstance.h"
|
|---|
| 64 |
|
|---|
| 65 | #define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
|
|---|
| 66 |
|
|---|
| 67 | //MKINIT
|
|---|
| 68 | //struct strpush {
|
|---|
| 69 | // struct strpush *prev; /* preceding string on stack */
|
|---|
| 70 | // char *prevstring;
|
|---|
| 71 | // int prevnleft;
|
|---|
| 72 | // int prevlleft;
|
|---|
| 73 | // struct alias *ap; /* if push was associated with an alias */
|
|---|
| 74 | //};
|
|---|
| 75 | //
|
|---|
| 76 | ///*
|
|---|
| 77 | // * The parsefile structure pointed to by the global variable parsefile
|
|---|
| 78 | // * contains information about the current file being read.
|
|---|
| 79 | // */
|
|---|
| 80 | //
|
|---|
| 81 | //MKINIT
|
|---|
| 82 | //struct parsefile {
|
|---|
| 83 | // struct parsefile *prev; /* preceding file on stack */
|
|---|
| 84 | // int linno; /* current line */
|
|---|
| 85 | // int fd; /* file descriptor (or -1 if string) */
|
|---|
| 86 | // int nleft; /* number of chars left in this line */
|
|---|
| 87 | // int lleft; /* number of chars left in this buffer */
|
|---|
| 88 | // char *nextc; /* next char in buffer */
|
|---|
| 89 | // char *buf; /* input buffer */
|
|---|
| 90 | // struct strpush *strpush; /* for pushing strings at this level */
|
|---|
| 91 | // struct strpush basestrpush; /* so pushing one is fast */
|
|---|
| 92 | //};
|
|---|
| 93 | //
|
|---|
| 94 | //
|
|---|
| 95 | //int plinno = 1; /* input line number */
|
|---|
| 96 | //int parsenleft; /* copy of parsefile->nleft */
|
|---|
| 97 | //MKINIT int parselleft; /* copy of parsefile->lleft */
|
|---|
| 98 | //char *parsenextc; /* copy of parsefile->nextc */
|
|---|
| 99 | //MKINIT struct parsefile basepf; /* top level input file */
|
|---|
| 100 | //MKINIT char basebuf[BUFSIZ]; /* buffer for top level input file */
|
|---|
| 101 | //struct parsefile *parsefile = &basepf; /* current input file */
|
|---|
| 102 | //int init_editline = 0; /* editline library initialized? */
|
|---|
| 103 | //int whichprompt; /* 1 == PS1, 2 == PS2 */
|
|---|
| 104 | //
|
|---|
| 105 | //#ifndef SMALL
|
|---|
| 106 | //EditLine *el; /* cookie for editline package */
|
|---|
| 107 | //#endif
|
|---|
| 108 |
|
|---|
| 109 | STATIC void pushfile(shinstance *psh);
|
|---|
| 110 | static int preadfd(shinstance *psh);
|
|---|
| 111 |
|
|---|
| 112 | #ifdef mkinit
|
|---|
| 113 | INCLUDE <stdio.h>
|
|---|
| 114 | INCLUDE "input.h"
|
|---|
| 115 | INCLUDE "error.h"
|
|---|
| 116 |
|
|---|
| 117 | INIT {
|
|---|
| 118 | psh->basepf.nextc = psh->basepf.buf = psh->basebuf;
|
|---|
| 119 | }
|
|---|
| 120 |
|
|---|
| 121 | RESET {
|
|---|
| 122 | if (psh->exception != EXSHELLPROC)
|
|---|
| 123 | psh->parselleft = psh->parsenleft = 0; /* clear input buffer */
|
|---|
| 124 | popallfiles(psh);
|
|---|
| 125 | }
|
|---|
| 126 |
|
|---|
| 127 | SHELLPROC {
|
|---|
| 128 | popallfiles(psh);
|
|---|
| 129 | }
|
|---|
| 130 | #endif
|
|---|
| 131 |
|
|---|
| 132 |
|
|---|
| 133 | /*
|
|---|
| 134 | * Read a line from the script.
|
|---|
| 135 | */
|
|---|
| 136 |
|
|---|
| 137 | char *
|
|---|
| 138 | pfgets(shinstance *psh, char *line, int len)
|
|---|
| 139 | {
|
|---|
| 140 | char *p = line;
|
|---|
| 141 | int nleft = len;
|
|---|
| 142 | int c;
|
|---|
| 143 |
|
|---|
| 144 | while (--nleft > 0) {
|
|---|
| 145 | c = pgetc_macro(psh);
|
|---|
| 146 | if (c == PEOF) {
|
|---|
| 147 | if (p == line)
|
|---|
| 148 | return NULL;
|
|---|
| 149 | break;
|
|---|
| 150 | }
|
|---|
| 151 | *p++ = c;
|
|---|
| 152 | if (c == '\n')
|
|---|
| 153 | break;
|
|---|
| 154 | }
|
|---|
| 155 | *p = '\0';
|
|---|
| 156 | return line;
|
|---|
| 157 | }
|
|---|
| 158 |
|
|---|
| 159 |
|
|---|
| 160 |
|
|---|
| 161 | /*
|
|---|
| 162 | * Read a character from the script, returning PEOF on end of file.
|
|---|
| 163 | * Nul characters in the input are silently discarded.
|
|---|
| 164 | */
|
|---|
| 165 |
|
|---|
| 166 | int
|
|---|
| 167 | pgetc(shinstance *psh)
|
|---|
| 168 | {
|
|---|
| 169 | return pgetc_macro(psh);
|
|---|
| 170 | }
|
|---|
| 171 |
|
|---|
| 172 |
|
|---|
| 173 | static int
|
|---|
| 174 | preadfd(shinstance *psh)
|
|---|
| 175 | {
|
|---|
| 176 | int nr;
|
|---|
| 177 | char *buf = psh->parsefile->buf;
|
|---|
| 178 | psh->parsenextc = buf;
|
|---|
| 179 |
|
|---|
| 180 | retry:
|
|---|
| 181 | #ifndef SMALL
|
|---|
| 182 | if (psh->parsefile->fd == 0 && psh->el) {
|
|---|
| 183 | static const char *rl_cp;
|
|---|
| 184 | static int el_len;
|
|---|
| 185 |
|
|---|
| 186 | if (rl_cp == NULL)
|
|---|
| 187 | rl_cp = el_gets(psh->el, &el_len);
|
|---|
| 188 | if (rl_cp == NULL)
|
|---|
| 189 | nr = 0;
|
|---|
| 190 | else {
|
|---|
| 191 | nr = el_len;
|
|---|
| 192 | if (nr > BUFSIZ - 8)
|
|---|
| 193 | nr = BUFSIZ - 8;
|
|---|
| 194 | memcpy(buf, rl_cp, nr);
|
|---|
| 195 | if (nr != el_len) {
|
|---|
| 196 | el_len -= nr;
|
|---|
| 197 | rl_cp += nr;
|
|---|
| 198 | } else
|
|---|
| 199 | rl_cp = 0;
|
|---|
| 200 | }
|
|---|
| 201 |
|
|---|
| 202 | } else
|
|---|
| 203 | #endif
|
|---|
| 204 | nr = shfile_read(&psh->fdtab, psh->parsefile->fd, buf, BUFSIZ - 8);
|
|---|
| 205 |
|
|---|
| 206 |
|
|---|
| 207 | if (nr <= 0) {
|
|---|
| 208 | if (nr < 0) {
|
|---|
| 209 | if (errno == EINTR)
|
|---|
| 210 | goto retry;
|
|---|
| 211 | if (psh->parsefile->fd == 0 && errno == EWOULDBLOCK) {
|
|---|
| 212 | int flags = shfile_fcntl(&psh->fdtab, 0, F_GETFL, 0);
|
|---|
| 213 | if (flags >= 0 && flags & O_NONBLOCK) {
|
|---|
| 214 | flags &=~ O_NONBLOCK;
|
|---|
| 215 | if (shfile_fcntl(&psh->fdtab, 0, F_SETFL, flags) >= 0) {
|
|---|
| 216 | out2str(psh, "sh: turning off NDELAY mode\n");
|
|---|
| 217 | goto retry;
|
|---|
| 218 | }
|
|---|
| 219 | }
|
|---|
| 220 | }
|
|---|
| 221 | }
|
|---|
| 222 | nr = -1;
|
|---|
| 223 | }
|
|---|
| 224 | return nr;
|
|---|
| 225 | }
|
|---|
| 226 |
|
|---|
| 227 | /*
|
|---|
| 228 | * Refill the input buffer and return the next input character:
|
|---|
| 229 | *
|
|---|
| 230 | * 1) If a string was pushed back on the input, pop it;
|
|---|
| 231 | * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
|
|---|
| 232 | * from a string so we can't refill the buffer, return EOF.
|
|---|
| 233 | * 3) If the is more stuff in this buffer, use it else call read to fill it.
|
|---|
| 234 | * 4) Process input up to the next newline, deleting nul characters.
|
|---|
| 235 | */
|
|---|
| 236 |
|
|---|
| 237 | int
|
|---|
| 238 | preadbuffer(shinstance *psh)
|
|---|
| 239 | {
|
|---|
| 240 | char *p, *q;
|
|---|
| 241 | int more;
|
|---|
| 242 | int something;
|
|---|
| 243 | char savec;
|
|---|
| 244 |
|
|---|
| 245 | if (psh->parsefile->strpush) {
|
|---|
| 246 | popstring(psh);
|
|---|
| 247 | if (--psh->parsenleft >= 0)
|
|---|
| 248 | return (*psh->parsenextc++);
|
|---|
| 249 | }
|
|---|
| 250 | if (psh->parsenleft == EOF_NLEFT || psh->parsefile->buf == NULL)
|
|---|
| 251 | return PEOF;
|
|---|
| 252 | flushout(&psh->output);
|
|---|
| 253 | flushout(&psh->errout);
|
|---|
| 254 |
|
|---|
| 255 | again:
|
|---|
| 256 | if (psh->parselleft <= 0) {
|
|---|
| 257 | if ((psh->parselleft = preadfd(psh)) == -1) {
|
|---|
| 258 | psh->parselleft = psh->parsenleft = EOF_NLEFT;
|
|---|
| 259 | return PEOF;
|
|---|
| 260 | }
|
|---|
| 261 | }
|
|---|
| 262 |
|
|---|
| 263 | q = p = psh->parsenextc;
|
|---|
| 264 |
|
|---|
| 265 | /* delete nul characters */
|
|---|
| 266 | something = 0;
|
|---|
| 267 | for (more = 1; more;) {
|
|---|
| 268 | switch (*p) {
|
|---|
| 269 | case '\0':
|
|---|
| 270 | p++; /* Skip nul */
|
|---|
| 271 | goto check;
|
|---|
| 272 |
|
|---|
| 273 | case '\t':
|
|---|
| 274 | case ' ':
|
|---|
| 275 | break;
|
|---|
| 276 |
|
|---|
| 277 | case '\n':
|
|---|
| 278 | psh->parsenleft = (int)(q - psh->parsenextc);
|
|---|
| 279 | more = 0; /* Stop processing here */
|
|---|
| 280 | break;
|
|---|
| 281 |
|
|---|
| 282 | default:
|
|---|
| 283 | something = 1;
|
|---|
| 284 | break;
|
|---|
| 285 | }
|
|---|
| 286 |
|
|---|
| 287 | *q++ = *p++;
|
|---|
| 288 | check:
|
|---|
| 289 | if (--psh->parselleft <= 0) {
|
|---|
| 290 | psh->parsenleft = (int)(q - psh->parsenextc - 1);
|
|---|
| 291 | if (psh->parsenleft < 0)
|
|---|
| 292 | goto again;
|
|---|
| 293 | *q = '\0';
|
|---|
| 294 | more = 0;
|
|---|
| 295 | }
|
|---|
| 296 | }
|
|---|
| 297 |
|
|---|
| 298 | savec = *q;
|
|---|
| 299 | *q = '\0';
|
|---|
| 300 |
|
|---|
| 301 | #ifndef SMALL
|
|---|
| 302 | if (psh->parsefile->fd == 0 && hist && something) {
|
|---|
| 303 | HistEvent he;
|
|---|
| 304 | INTOFF;
|
|---|
| 305 | history(hist, &he, psh->whichprompt == 1? H_ENTER : H_APPEND,
|
|---|
| 306 | psh->parsenextc);
|
|---|
| 307 | INTON;
|
|---|
| 308 | }
|
|---|
| 309 | #endif
|
|---|
| 310 |
|
|---|
| 311 | if (vflag(psh)) {
|
|---|
| 312 | out2str(psh, psh->parsenextc);
|
|---|
| 313 | flushout(psh->out2);
|
|---|
| 314 | }
|
|---|
| 315 |
|
|---|
| 316 | *q = savec;
|
|---|
| 317 |
|
|---|
| 318 | return *psh->parsenextc++;
|
|---|
| 319 | }
|
|---|
| 320 |
|
|---|
| 321 | /*
|
|---|
| 322 | * Undo the last call to pgetc. Only one character may be pushed back.
|
|---|
| 323 | * PEOF may be pushed back.
|
|---|
| 324 | */
|
|---|
| 325 |
|
|---|
| 326 | void
|
|---|
| 327 | pungetc(shinstance *psh)
|
|---|
| 328 | {
|
|---|
| 329 | psh->parsenleft++;
|
|---|
| 330 | psh->parsenextc--;
|
|---|
| 331 | }
|
|---|
| 332 |
|
|---|
| 333 | /*
|
|---|
| 334 | * Push a string back onto the input at this current parsefile level.
|
|---|
| 335 | * We handle aliases this way.
|
|---|
| 336 | */
|
|---|
| 337 | void
|
|---|
| 338 | pushstring(shinstance *psh, char *s, size_t len, void *ap)
|
|---|
| 339 | {
|
|---|
| 340 | struct strpush *sp;
|
|---|
| 341 |
|
|---|
| 342 | INTOFF;
|
|---|
| 343 | /*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
|
|---|
| 344 | if (psh->parsefile->strpush) {
|
|---|
| 345 | sp = ckmalloc(sizeof (struct strpush));
|
|---|
| 346 | sp->prev = psh->parsefile->strpush;
|
|---|
| 347 | psh->parsefile->strpush = sp;
|
|---|
| 348 | } else
|
|---|
| 349 | sp = psh->parsefile->strpush = &(psh->parsefile->basestrpush);
|
|---|
| 350 | sp->prevstring = psh->parsenextc;
|
|---|
| 351 | sp->prevnleft = psh->parsenleft;
|
|---|
| 352 | sp->prevlleft = psh->parselleft;
|
|---|
| 353 | sp->ap = (struct alias *)ap;
|
|---|
| 354 | if (ap)
|
|---|
| 355 | ((struct alias *)ap)->flag |= ALIASINUSE;
|
|---|
| 356 | psh->parsenextc = s;
|
|---|
| 357 | psh->parsenleft = (int)len;
|
|---|
| 358 | INTON;
|
|---|
| 359 | }
|
|---|
| 360 |
|
|---|
| 361 | void
|
|---|
| 362 | popstring(shinstance *psh)
|
|---|
| 363 | {
|
|---|
| 364 | struct strpush *sp = psh->parsefile->strpush;
|
|---|
| 365 |
|
|---|
| 366 | INTOFF;
|
|---|
| 367 | psh->parsenextc = sp->prevstring;
|
|---|
| 368 | psh->parsenleft = sp->prevnleft;
|
|---|
| 369 | psh->parselleft = sp->prevlleft;
|
|---|
| 370 | /*dprintf("*** calling popstring: restoring to '%s'\n", psh->parsenextc);*/
|
|---|
| 371 | if (sp->ap)
|
|---|
| 372 | sp->ap->flag &= ~ALIASINUSE;
|
|---|
| 373 | psh->parsefile->strpush = sp->prev;
|
|---|
| 374 | if (sp != &(psh->parsefile->basestrpush))
|
|---|
| 375 | ckfree(sp);
|
|---|
| 376 | INTON;
|
|---|
| 377 | }
|
|---|
| 378 |
|
|---|
| 379 | /*
|
|---|
| 380 | * Set the input to take input from a file. If push is set, push the
|
|---|
| 381 | * old input onto the stack first.
|
|---|
| 382 | */
|
|---|
| 383 |
|
|---|
| 384 | void
|
|---|
| 385 | setinputfile(shinstance *psh, const char *fname, int push)
|
|---|
| 386 | {
|
|---|
| 387 | int fd;
|
|---|
| 388 | int fd2;
|
|---|
| 389 |
|
|---|
| 390 | INTOFF;
|
|---|
| 391 | /** @todo shfile fixme */
|
|---|
| 392 | if ((fd = shfile_open(&psh->fdtab, fname, O_RDONLY, 0)) < 0)
|
|---|
| 393 | error(psh, "Can't open %s", fname);
|
|---|
| 394 | if (fd < 10) {
|
|---|
| 395 | fd2 = copyfd(psh, fd, 10);
|
|---|
| 396 | shfile_close(&psh->fdtab, fd);
|
|---|
| 397 | if (fd2 < 0)
|
|---|
| 398 | error(psh, "Out of file descriptors");
|
|---|
| 399 | fd = fd2;
|
|---|
| 400 | }
|
|---|
| 401 | setinputfd(psh, fd, push);
|
|---|
| 402 | INTON;
|
|---|
| 403 | }
|
|---|
| 404 |
|
|---|
| 405 |
|
|---|
| 406 | /*
|
|---|
| 407 | * Like setinputfile, but takes an open file descriptor. Call this with
|
|---|
| 408 | * interrupts off.
|
|---|
| 409 | */
|
|---|
| 410 |
|
|---|
| 411 | void
|
|---|
| 412 | setinputfd(shinstance *psh, int fd, int push)
|
|---|
| 413 | {
|
|---|
| 414 | (void) shfile_fcntl(&psh->fdtab, fd, F_SETFD, FD_CLOEXEC);
|
|---|
| 415 | if (push) {
|
|---|
| 416 | pushfile(psh);
|
|---|
| 417 | psh->parsefile->buf = ckmalloc(BUFSIZ);
|
|---|
| 418 | }
|
|---|
| 419 | if (psh->parsefile->fd > 0)
|
|---|
| 420 | shfile_close(&psh->fdtab, psh->parsefile->fd);
|
|---|
| 421 | psh->parsefile->fd = fd;
|
|---|
| 422 | if (psh->parsefile->buf == NULL)
|
|---|
| 423 | psh->parsefile->buf = ckmalloc(BUFSIZ);
|
|---|
| 424 | psh->parselleft = psh->parsenleft = 0;
|
|---|
| 425 | psh->plinno = 1;
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 |
|
|---|
| 429 | /*
|
|---|
| 430 | * Like setinputfile, but takes input from a string.
|
|---|
| 431 | */
|
|---|
| 432 |
|
|---|
| 433 | void
|
|---|
| 434 | setinputstring(shinstance *psh, char *string, int push)
|
|---|
| 435 | {
|
|---|
| 436 | INTOFF;
|
|---|
| 437 | if (push)
|
|---|
| 438 | pushfile(psh);
|
|---|
| 439 | psh->parsenextc = string;
|
|---|
| 440 | psh->parselleft = psh->parsenleft = (int)strlen(string);
|
|---|
| 441 | psh->parsefile->buf = NULL;
|
|---|
| 442 | psh->plinno = 1;
|
|---|
| 443 | INTON;
|
|---|
| 444 | }
|
|---|
| 445 |
|
|---|
| 446 |
|
|---|
| 447 |
|
|---|
| 448 | /*
|
|---|
| 449 | * To handle the "." command, a stack of input files is used. Pushfile
|
|---|
| 450 | * adds a new entry to the stack and popfile restores the previous level.
|
|---|
| 451 | */
|
|---|
| 452 |
|
|---|
| 453 | STATIC void
|
|---|
| 454 | pushfile(shinstance *psh)
|
|---|
| 455 | {
|
|---|
| 456 | struct parsefile *pf;
|
|---|
| 457 |
|
|---|
| 458 | psh->parsefile->nleft = psh->parsenleft;
|
|---|
| 459 | psh->parsefile->lleft = psh->parselleft;
|
|---|
| 460 | psh->parsefile->nextc = psh->parsenextc;
|
|---|
| 461 | psh->parsefile->linno = psh->plinno;
|
|---|
| 462 | pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
|
|---|
| 463 | pf->prev = psh->parsefile;
|
|---|
| 464 | pf->fd = -1;
|
|---|
| 465 | pf->strpush = NULL;
|
|---|
| 466 | pf->basestrpush.prev = NULL;
|
|---|
| 467 | psh->parsefile = pf;
|
|---|
| 468 | }
|
|---|
| 469 |
|
|---|
| 470 |
|
|---|
| 471 | void
|
|---|
| 472 | popfile(shinstance *psh)
|
|---|
| 473 | {
|
|---|
| 474 | struct parsefile *pf = psh->parsefile;
|
|---|
| 475 |
|
|---|
| 476 | INTOFF;
|
|---|
| 477 | if (pf->fd >= 0)
|
|---|
| 478 | shfile_close(&psh->fdtab, pf->fd);
|
|---|
| 479 | if (pf->buf)
|
|---|
| 480 | ckfree(pf->buf);
|
|---|
| 481 | while (pf->strpush)
|
|---|
| 482 | popstring(psh);
|
|---|
| 483 | psh->parsefile = pf->prev;
|
|---|
| 484 | ckfree(pf);
|
|---|
| 485 | psh->parsenleft = psh->parsefile->nleft;
|
|---|
| 486 | psh->parselleft = psh->parsefile->lleft;
|
|---|
| 487 | psh->parsenextc = psh->parsefile->nextc;
|
|---|
| 488 | psh->plinno = psh->parsefile->linno;
|
|---|
| 489 | INTON;
|
|---|
| 490 | }
|
|---|
| 491 |
|
|---|
| 492 |
|
|---|
| 493 | /*
|
|---|
| 494 | * Return to top level.
|
|---|
| 495 | */
|
|---|
| 496 |
|
|---|
| 497 | void
|
|---|
| 498 | popallfiles(shinstance *psh)
|
|---|
| 499 | {
|
|---|
| 500 | while (psh->parsefile != &psh->basepf)
|
|---|
| 501 | popfile(psh);
|
|---|
| 502 | }
|
|---|
| 503 |
|
|---|
| 504 |
|
|---|
| 505 |
|
|---|
| 506 | /*
|
|---|
| 507 | * Close the file(s) that the shell is reading commands from. Called
|
|---|
| 508 | * after a fork is done.
|
|---|
| 509 | *
|
|---|
| 510 | * Takes one arg, vfork, which tells it to not modify its global vars
|
|---|
| 511 | * as it is still running in the parent.
|
|---|
| 512 | *
|
|---|
| 513 | * This code is (probably) unnecessary as the 'close on exec' flag is
|
|---|
| 514 | * set and should be enough. In the vfork case it is definitely wrong
|
|---|
| 515 | * to close the fds as another fork() may be done later to feed data
|
|---|
| 516 | * from a 'here' document into a pipe and we don't want to close the
|
|---|
| 517 | * pipe!
|
|---|
| 518 | */
|
|---|
| 519 |
|
|---|
| 520 | void
|
|---|
| 521 | closescript(shinstance *psh, int vforked)
|
|---|
| 522 | {
|
|---|
| 523 | if (vforked)
|
|---|
| 524 | return;
|
|---|
| 525 | popallfiles(psh);
|
|---|
| 526 | if (psh->parsefile->fd > 0) {
|
|---|
| 527 | shfile_close(&psh->fdtab, psh->parsefile->fd);
|
|---|
| 528 | psh->parsefile->fd = 0;
|
|---|
| 529 | }
|
|---|
| 530 | }
|
|---|
