1 /* $OpenBSD: interactive.c,v 1.25 2007/09/25 09:51:48 chl Exp $ */ 2 /* $NetBSD: interactive.c,v 1.10 1997/03/19 08:42:52 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 1985, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)interactive.c 8.3 (Berkeley) 9/13/94"; 36 #else 37 static const char rcsid[] = "$OpenBSD: interactive.c,v 1.25 2007/09/25 09:51:48 chl Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 45 #include <ufs/ffs/fs.h> 46 #include <ufs/ufs/dinode.h> 47 #include <ufs/ufs/dir.h> 48 #include <protocols/dumprestore.h> 49 50 #include <setjmp.h> 51 #include <glob.h> 52 #include <stdio.h> 53 #include <errno.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include "restore.h" 59 #include "extern.h" 60 61 #define round(a, b) (((a) + (b) - 1) / (b) * (b)) 62 63 /* 64 * Things to handle interruptions. 65 */ 66 static int runshell; 67 static jmp_buf reset; 68 static char *nextarg = NULL; 69 70 /* 71 * Structure and routines associated with listing directories. 72 */ 73 struct afile { 74 ino_t fnum; /* inode number of file */ 75 char *fname; /* file name */ 76 short len; /* name length */ 77 char prefix; /* prefix character */ 78 char postfix; /* postfix character */ 79 }; 80 struct arglist { 81 int freeglob; /* glob structure needs to be freed */ 82 int argcnt; /* next globbed argument to return */ 83 glob_t glob; /* globbing information */ 84 char *cmd; /* the current command */ 85 }; 86 87 static char *copynext(char *, char *); 88 static int fcmp(const void *, const void *); 89 static void formatf(struct afile *, int); 90 static void getcmd(char *, char *, size_t, char *, size_t, struct arglist *); 91 struct dirent *glob_readdir(RST_DIR *dirp); 92 static int glob_stat(const char *, struct stat *); 93 static void mkentry(char *, struct direct *, struct afile *); 94 static void printlist(char *, char *); 95 96 /* 97 * Read and execute commands from the terminal. 98 */ 99 void 100 runcmdshell(void) 101 { 102 struct entry *np; 103 ino_t ino; 104 struct arglist arglist; 105 char curdir[MAXPATHLEN]; 106 char name[MAXPATHLEN]; 107 char cmd[BUFSIZ]; 108 109 arglist.freeglob = 0; 110 arglist.argcnt = 0; 111 arglist.glob.gl_flags = GLOB_ALTDIRFUNC; 112 arglist.glob.gl_opendir = (void *)rst_opendir; 113 arglist.glob.gl_readdir = (void *)glob_readdir; 114 arglist.glob.gl_closedir = (void *)rst_closedir; 115 arglist.glob.gl_lstat = glob_stat; 116 arglist.glob.gl_stat = glob_stat; 117 canon("/", curdir, sizeof curdir); 118 loop: 119 if (setjmp(reset) != 0) { 120 if (arglist.freeglob != 0) { 121 arglist.freeglob = 0; 122 arglist.argcnt = 0; 123 globfree(&arglist.glob); 124 } 125 nextarg = NULL; 126 volno = 0; 127 } 128 runshell = 1; 129 getcmd(curdir, cmd, sizeof cmd, name, sizeof name, &arglist); 130 switch (cmd[0]) { 131 /* 132 * Add elements to the extraction list. 133 */ 134 case 'a': 135 if (strncmp(cmd, "add", strlen(cmd)) != 0) 136 goto bad; 137 ino = dirlookup(name); 138 if (ino == 0) 139 break; 140 if (mflag) 141 pathcheck(name); 142 treescan(name, ino, addfile); 143 break; 144 /* 145 * Change working directory. 146 */ 147 case 'c': 148 if (strncmp(cmd, "cd", strlen(cmd)) != 0) 149 goto bad; 150 ino = dirlookup(name); 151 if (ino == 0) 152 break; 153 if (inodetype(ino) == LEAF) { 154 fprintf(stderr, "%s: not a directory\n", name); 155 break; 156 } 157 (void)strlcpy(curdir, name, sizeof curdir); 158 break; 159 /* 160 * Delete elements from the extraction list. 161 */ 162 case 'd': 163 if (strncmp(cmd, "delete", strlen(cmd)) != 0) 164 goto bad; 165 np = lookupname(name); 166 if (np == NULL || (np->e_flags & NEW) == 0) { 167 fprintf(stderr, "%s: not on extraction list\n", name); 168 break; 169 } 170 treescan(name, np->e_ino, deletefile); 171 break; 172 /* 173 * Extract the requested list. 174 */ 175 case 'e': 176 if (strncmp(cmd, "extract", strlen(cmd)) != 0) 177 goto bad; 178 createfiles(); 179 createlinks(); 180 setdirmodes(0); 181 if (dflag) 182 checkrestore(); 183 volno = 0; 184 break; 185 /* 186 * List available commands. 187 */ 188 case 'h': 189 if (strncmp(cmd, "help", strlen(cmd)) != 0) 190 goto bad; 191 case '?': 192 fprintf(stderr, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 193 "Available commands are:\n", 194 "\tls [arg] - list directory\n", 195 "\tcd arg - change directory\n", 196 "\tpwd - print current directory\n", 197 "\tadd [arg] - add `arg' to list of", 198 " files to be extracted\n", 199 "\tdelete [arg] - delete `arg' from", 200 " list of files to be extracted\n", 201 "\textract - extract requested files\n", 202 "\tsetmodes - set modes of requested directories\n", 203 "\tquit - immediately exit program\n", 204 "\twhat - list dump header information\n", 205 "\tverbose - toggle verbose flag", 206 " (useful with ``ls'')\n", 207 "\thelp or `?' - print this list\n", 208 "If no `arg' is supplied, the current", 209 " directory is used\n"); 210 break; 211 /* 212 * List a directory. 213 */ 214 case 'l': 215 if (strncmp(cmd, "ls", strlen(cmd)) != 0) 216 goto bad; 217 printlist(name, curdir); 218 break; 219 /* 220 * Print current directory. 221 */ 222 case 'p': 223 if (strncmp(cmd, "pwd", strlen(cmd)) != 0) 224 goto bad; 225 if (curdir[1] == '\0') 226 fprintf(stderr, "/\n"); 227 else 228 fprintf(stderr, "%s\n", &curdir[1]); 229 break; 230 /* 231 * Quit. 232 */ 233 case 'q': 234 if (strncmp(cmd, "quit", strlen(cmd)) != 0) 235 goto bad; 236 return; 237 case 'x': 238 if (strncmp(cmd, "xit", strlen(cmd)) != 0) 239 goto bad; 240 return; 241 /* 242 * Toggle verbose mode. 243 */ 244 case 'v': 245 if (strncmp(cmd, "verbose", strlen(cmd)) != 0) 246 goto bad; 247 if (vflag) { 248 fprintf(stderr, "verbose mode off\n"); 249 vflag = 0; 250 break; 251 } 252 fprintf(stderr, "verbose mode on\n"); 253 vflag++; 254 break; 255 /* 256 * Just restore requested directory modes. 257 */ 258 case 's': 259 if (strncmp(cmd, "setmodes", strlen(cmd)) != 0) 260 goto bad; 261 setdirmodes(FORCE); 262 break; 263 /* 264 * Print out dump header information. 265 */ 266 case 'w': 267 if (strncmp(cmd, "what", strlen(cmd)) != 0) 268 goto bad; 269 printdumpinfo(); 270 break; 271 /* 272 * Turn on debugging. 273 */ 274 case 'D': 275 if (strncmp(cmd, "Debug", strlen(cmd)) != 0) 276 goto bad; 277 if (dflag) { 278 fprintf(stderr, "debugging mode off\n"); 279 dflag = 0; 280 break; 281 } 282 fprintf(stderr, "debugging mode on\n"); 283 dflag++; 284 break; 285 /* 286 * Unknown command. 287 */ 288 default: 289 bad: 290 fprintf(stderr, "%s: unknown command; type ? for help\n", cmd); 291 break; 292 } 293 goto loop; 294 } 295 296 /* 297 * Read and parse an interactive command. 298 * The first word on the line is assigned to "cmd". If 299 * there are no arguments on the command line, then "curdir" 300 * is returned as the argument. If there are arguments 301 * on the line they are returned one at a time on each 302 * successive call to getcmd. Each argument is first assigned 303 * to "name". If it does not start with "/" the pathname in 304 * "curdir" is prepended to it. Finally "canon" is called to 305 * eliminate any embedded ".." components. 306 */ 307 static void 308 getcmd(char *curdir, char *cmd, size_t cmdlen, char *name, size_t namelen, 309 struct arglist *ap) 310 { 311 char *cp; 312 static char input[BUFSIZ]; 313 char output[BUFSIZ]; 314 # define rawname input /* save space by reusing input buffer */ 315 int globretval; 316 317 /* 318 * Check to see if still processing arguments. 319 */ 320 if (ap->argcnt > 0) 321 goto retnext; 322 if (nextarg != NULL) 323 goto getnext; 324 /* 325 * Read a command line and trim off trailing white space. 326 */ 327 do { 328 (void)fprintf(stderr, "%s > ", __progname); 329 (void)fflush(stderr); 330 if (fgets(input, sizeof input, terminal) == NULL) { 331 (void)strlcpy(cmd, "quit", cmdlen); 332 return; 333 } 334 } while (input[0] == '\n' || input[0] == '\0'); 335 for (cp = &input[strlen(input) - 1]; 336 cp >= input && (*cp == ' ' || *cp == '\t' || *cp == '\n'); cp--) 337 /* trim off trailing white space and newline */; 338 *++cp = '\0'; 339 /* 340 * Copy the command into "cmd". 341 */ 342 cp = copynext(input, cmd); 343 ap->cmd = cmd; 344 /* 345 * If no argument, use curdir as the default. 346 */ 347 if (*cp == '\0') { 348 (void)strlcpy(name, curdir, MAXPATHLEN); 349 return; 350 } 351 nextarg = cp; 352 /* 353 * Find the next argument. 354 */ 355 getnext: 356 cp = copynext(nextarg, rawname); 357 if (*cp == '\0') 358 nextarg = NULL; 359 else 360 nextarg = cp; 361 /* 362 * If it is an absolute pathname, canonicalize it and return it. 363 */ 364 if (rawname[0] == '/') { 365 canon(rawname, name, namelen); 366 } else { 367 /* 368 * For relative pathnames, prepend the current directory to 369 * it then canonicalize and return it. 370 */ 371 snprintf(output, sizeof(output), "%s/%s", curdir, rawname); 372 canon(output, name, namelen); 373 } 374 if ((globretval = glob(name, GLOB_ALTDIRFUNC | GLOB_NOESCAPE, 375 NULL, &ap->glob)) < 0) { 376 fprintf(stderr, "%s: %s: ", ap->cmd, name); 377 switch (globretval) { 378 case GLOB_NOSPACE: 379 fprintf(stderr, "out of memory\n"); 380 break; 381 case GLOB_NOMATCH: 382 fprintf(stderr, "no filename match.\n"); 383 break; 384 case GLOB_ABORTED: 385 fprintf(stderr, "glob() aborted.\n"); 386 break; 387 default: 388 fprintf(stderr, "unknown error!\n"); 389 break; 390 } 391 } 392 393 if (ap->glob.gl_pathc == 0) 394 return; 395 ap->freeglob = 1; 396 ap->argcnt = ap->glob.gl_pathc; 397 398 retnext: 399 strlcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt], 400 MAXPATHLEN); 401 if (--ap->argcnt == 0) { 402 ap->freeglob = 0; 403 globfree(&ap->glob); 404 } 405 # undef rawname 406 } 407 408 /* 409 * Strip off the next token of the input. 410 */ 411 static char * 412 copynext(char *input, char *output) 413 { 414 char *cp, *bp; 415 char quote; 416 417 for (cp = input; *cp == ' ' || *cp == '\t'; cp++) 418 /* skip to argument */; 419 bp = output; 420 while (*cp != ' ' && *cp != '\t' && *cp != '\0') { 421 /* 422 * Handle back slashes. 423 */ 424 if (*cp == '\\') { 425 if (*++cp == '\0') { 426 fprintf(stderr, 427 "command lines cannot be continued\n"); 428 continue; 429 } 430 *bp++ = *cp++; 431 continue; 432 } 433 /* 434 * The usual unquoted case. 435 */ 436 if (*cp != '\'' && *cp != '"') { 437 *bp++ = *cp++; 438 continue; 439 } 440 /* 441 * Handle single and double quotes. 442 */ 443 quote = *cp++; 444 while (*cp != quote && *cp != '\0') 445 *bp++ = *cp++; 446 if (*cp++ == '\0') { 447 fprintf(stderr, "missing %c\n", quote); 448 cp--; 449 continue; 450 } 451 } 452 *bp = '\0'; 453 return (cp); 454 } 455 456 /* 457 * Canonicalize file names to always start with ``./'' and 458 * remove any imbedded "." and ".." components. 459 */ 460 void 461 canon(char *rawname, char *canonname, size_t canonnamelen) 462 { 463 char *cp, *np; 464 465 if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) 466 (void)strlcpy(canonname, "", canonnamelen); 467 else if (rawname[0] == '/') 468 (void)strlcpy(canonname, ".", canonnamelen); 469 else 470 (void)strlcpy(canonname, "./", canonnamelen); 471 (void)strlcat(canonname, rawname, canonnamelen); 472 /* 473 * Eliminate multiple and trailing '/'s 474 */ 475 for (cp = np = canonname; *np != '\0'; cp++) { 476 *cp = *np++; 477 while (*cp == '/' && *np == '/') 478 np++; 479 } 480 *cp = '\0'; 481 if (*--cp == '/') 482 *cp = '\0'; 483 /* 484 * Eliminate extraneous "." and ".." from pathnames. 485 */ 486 for (np = canonname; *np != '\0'; ) { 487 np++; 488 cp = np; 489 while (*np != '/' && *np != '\0') 490 np++; 491 if (np - cp == 1 && *cp == '.') { 492 cp--; 493 (void)strlcpy(cp, np, canonname + canonnamelen - cp); 494 np = cp; 495 } 496 if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { 497 cp--; 498 while (cp > &canonname[1] && *--cp != '/') 499 /* find beginning of name */; 500 (void)strlcpy(cp, np, canonname + canonnamelen - cp); 501 np = cp; 502 } 503 } 504 } 505 506 /* 507 * Do an "ls" style listing of a directory 508 */ 509 static void 510 printlist(char *name, char *basename) 511 { 512 struct afile *fp, *list, *listp = NULL; 513 struct direct *dp; 514 struct afile single; 515 RST_DIR *dirp; 516 size_t namelen; 517 int entries, len; 518 char locname[MAXPATHLEN]; 519 520 dp = pathsearch(name); 521 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0)) 522 return; 523 if ((dirp = rst_opendir(name)) == NULL) { 524 entries = 1; 525 list = &single; 526 mkentry(name, dp, list); 527 len = strlen(basename) + 1; 528 if (strlen(name) - len > single.len) { 529 freename(single.fname); 530 single.fname = savename(&name[len]); 531 single.len = strlen(single.fname); 532 } 533 } else { 534 entries = 0; 535 while ((dp = rst_readdir(dirp))) 536 entries++; 537 rst_closedir(dirp); 538 list = (struct afile *)calloc(entries, sizeof(struct afile)); 539 if (list == NULL) { 540 fprintf(stderr, "ls: out of memory\n"); 541 return; 542 } 543 if ((dirp = rst_opendir(name)) == NULL) 544 panic("directory reopen failed\n"); 545 fprintf(stderr, "%s:\n", name); 546 entries = 0; 547 listp = list; 548 namelen = strlcpy(locname, name, sizeof(locname)); 549 if (namelen >= sizeof(locname) - 1) 550 namelen = sizeof(locname) - 2; 551 locname[namelen++] = '/'; 552 locname[namelen] = '\0'; 553 while ((dp = rst_readdir(dirp))) { 554 if (dp == NULL) 555 break; 556 if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) 557 continue; 558 if (!vflag && (strcmp(dp->d_name, ".") == 0 || 559 strcmp(dp->d_name, "..") == 0)) 560 continue; 561 locname[namelen] = '\0'; 562 if (namelen + dp->d_namlen >= MAXPATHLEN) { 563 fprintf(stderr, "%s%s: name exceeds %d char\n", 564 locname, dp->d_name, MAXPATHLEN); 565 } else { 566 (void)strncat(locname, dp->d_name, 567 (int)dp->d_namlen); 568 mkentry(locname, dp, listp++); 569 entries++; 570 } 571 } 572 rst_closedir(dirp); 573 if (entries == 0) { 574 fprintf(stderr, "\n"); 575 free(list); 576 return; 577 } 578 qsort((char *)list, entries, sizeof(struct afile), fcmp); 579 } 580 formatf(list, entries); 581 if (dirp != NULL) { 582 for (fp = listp - 1; fp >= list; fp--) 583 freename(fp->fname); 584 fprintf(stderr, "\n"); 585 free(list); 586 } 587 } 588 589 /* 590 * Read the contents of a directory. 591 */ 592 static void 593 mkentry(char *name, struct direct *dp, struct afile *fp) 594 { 595 char *cp; 596 struct entry *np; 597 598 fp->fnum = dp->d_ino; 599 fp->fname = savename(dp->d_name); 600 for (cp = fp->fname; *cp; cp++) 601 if (!vflag && (*cp < ' ' || *cp >= 0177)) 602 *cp = '?'; 603 fp->len = cp - fp->fname; 604 if (dflag && TSTINO(fp->fnum, dumpmap) == 0) 605 fp->prefix = '^'; 606 else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) 607 fp->prefix = '*'; 608 else 609 fp->prefix = ' '; 610 switch(dp->d_type) { 611 612 default: 613 fprintf(stderr, "Warning: undefined file type %d\n", 614 dp->d_type); 615 /* fall through */ 616 case DT_REG: 617 fp->postfix = ' '; 618 break; 619 620 case DT_LNK: 621 fp->postfix = '@'; 622 break; 623 624 case DT_FIFO: 625 case DT_SOCK: 626 fp->postfix = '='; 627 break; 628 629 case DT_CHR: 630 case DT_BLK: 631 fp->postfix = '#'; 632 break; 633 634 case DT_UNKNOWN: 635 case DT_DIR: 636 if (inodetype(dp->d_ino) == NODE) 637 fp->postfix = '/'; 638 else 639 fp->postfix = ' '; 640 break; 641 } 642 return; 643 } 644 645 /* 646 * Print out a pretty listing of a directory 647 */ 648 static void 649 formatf(struct afile *list, int nentry) 650 { 651 struct afile *fp, *endlist; 652 int width, bigino, haveprefix, havepostfix; 653 int i, j, w, precision = 0, columns, lines; 654 655 width = 0; 656 haveprefix = 0; 657 havepostfix = 0; 658 bigino = ROOTINO; 659 endlist = &list[nentry]; 660 for (fp = &list[0]; fp < endlist; fp++) { 661 if (bigino < fp->fnum) 662 bigino = fp->fnum; 663 if (width < fp->len) 664 width = fp->len; 665 if (fp->prefix != ' ') 666 haveprefix = 1; 667 if (fp->postfix != ' ') 668 havepostfix = 1; 669 } 670 if (haveprefix) 671 width++; 672 if (havepostfix) 673 width++; 674 if (vflag) { 675 for (precision = 0, i = bigino; i > 0; i /= 10) 676 precision++; 677 width += precision + 1; 678 } 679 width++; 680 columns = 81 / width; 681 if (columns == 0) 682 columns = 1; 683 lines = (nentry + columns - 1) / columns; 684 for (i = 0; i < lines; i++) { 685 for (j = 0; j < columns; j++) { 686 fp = &list[j * lines + i]; 687 if (vflag) { 688 fprintf(stderr, "%*d ", precision, fp->fnum); 689 fp->len += precision + 1; 690 } 691 if (haveprefix) { 692 putc(fp->prefix, stderr); 693 fp->len++; 694 } 695 fprintf(stderr, "%s", fp->fname); 696 if (havepostfix) { 697 putc(fp->postfix, stderr); 698 fp->len++; 699 } 700 if (fp + lines >= endlist) { 701 fprintf(stderr, "\n"); 702 break; 703 } 704 for (w = fp->len; w < width; w++) 705 putc(' ', stderr); 706 } 707 } 708 } 709 710 /* 711 * Skip over directory entries that are not on the tape 712 * 713 * First have to get definition of a dirent. 714 */ 715 #undef DIRBLKSIZ 716 #include <dirent.h> 717 #undef d_ino 718 719 struct dirent * 720 glob_readdir(RST_DIR *dirp) 721 { 722 struct direct *dp; 723 static struct dirent adirent; 724 725 while ((dp = rst_readdir(dirp)) != NULL) { 726 if (dflag || TSTINO(dp->d_ino, dumpmap)) 727 break; 728 } 729 if (dp == NULL) 730 return (NULL); 731 adirent.d_fileno = dp->d_ino; 732 adirent.d_namlen = dp->d_namlen; 733 memcpy(adirent.d_name, dp->d_name, dp->d_namlen + 1); 734 return (&adirent); 735 } 736 737 /* 738 * Return st_mode information in response to stat or lstat calls 739 */ 740 static int 741 glob_stat(const char *name, struct stat *stp) 742 { 743 struct direct *dp; 744 745 dp = pathsearch(name); 746 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0)) 747 return (-1); 748 if (inodetype(dp->d_ino) == NODE) 749 stp->st_mode = S_IFDIR; 750 else 751 stp->st_mode = S_IFREG; 752 return (0); 753 } 754 755 /* 756 * Comparison routine for qsort. 757 */ 758 static int 759 fcmp(const void *f1, const void *f2) 760 { 761 return (strcmp(((struct afile *)f1)->fname, 762 ((struct afile *)f2)->fname)); 763 } 764 765 /* 766 * respond to interrupts 767 */ 768 void 769 onintr(int signo) 770 { 771 int save_errno = errno; 772 773 if (command == 'i' && runshell) 774 longjmp(reset, 1); /* XXX signal/longjmp reentrancy */ 775 if (reply("restore interrupted, continue") == FAIL) /* XXX signal race */ 776 _exit(1); 777 errno = save_errno; 778 } 779