1/* vi: set sw=4 ts=4: */ 2/* 3 * Utility routines. 4 * 5 * Copyright (C) tons of folks. Tracking down who wrote what 6 * isn't something I'm going to worry about... If you wrote something 7 * here, please feel free to acknowledge your work. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell 24 * Permission has been granted to redistribute this code under the GPL. 25 * 26 */ 27 28#include <stdio.h> 29#include <string.h> 30#include <errno.h> 31#include <fcntl.h> 32#include <dirent.h> 33#include <time.h> 34#include <utime.h> 35#include <unistd.h> 36#include <ctype.h> 37#include <stdlib.h> 38#include <limits.h> 39#include <stdarg.h> 40#include <sys/ioctl.h> 41#include <sys/utsname.h> /* for uname(2) */ 42 43#include "busybox.h" 44#if defined(BB_CHMOD_CHOWN_CHGRP) \ 45 || defined (BB_CP_MV) \ 46 || defined (BB_FIND) \ 47 || defined (BB_INSMOD) \ 48 || defined (BB_LS) \ 49 || defined (BB_RM) \ 50 || defined (BB_TAR) 51/* same conditions as recursive_action */ 52#define bb_need_name_too_long 53#endif 54#define bb_need_memory_exhausted 55#define bb_need_full_version 56#define BB_DECLARE_EXTERN 57#include "messages.c" 58 59#include "pwd_grp/pwd.h" 60#include "pwd_grp/grp.h" 61 62/* for the _syscall() macros */ 63#include <sys/syscall.h> 64#include <linux/unistd.h> 65 66/* Busybox mount uses either /proc/mounts or /dev/mtab to 67 * get the list of currently mounted filesystems */ 68#if defined BB_MOUNT || defined BB_UMOUNT || defined BB_DF 69# if defined BB_MTAB 70const char mtab_file[] = "/etc/mtab"; 71# else 72# if defined BB_FEATURE_USE_DEVPS_PATCH 73const char mtab_file[] = "/dev/mtab"; 74# else 75const char mtab_file[] = "/proc/mounts"; 76# endif 77# endif 78#endif 79 80#if defined(BB_KLOGD) || defined(BB_LOGGER) 81#include <syslog.h> 82#endif 83 84static struct BB_applet *applet_using; 85 86extern void show_usage(void) 87{ 88 const char *format_string; 89 const char *usage_string = usage_messages; 90 int i; 91 92 for (i = applet_using - applets; i > 0; ) { 93 if (!*usage_string++) { 94 --i; 95 } 96 } 97 format_string = "%s\n\nUsage: %s %s\n\n"; 98 if(*usage_string == 0) 99 format_string = "%s\n\nNo help available.\n\n"; 100 fprintf(stderr, format_string, 101 full_version, applet_using->name, usage_string); 102 exit(EXIT_FAILURE); 103} 104 105 106static void verror_msg(const char *s, va_list p) 107{ 108 fflush(stdout); 109 fprintf(stderr, "%s: ", applet_name); 110 vfprintf(stderr, s, p); 111} 112 113extern void error_msg(const char *s, ...) 114{ 115 va_list p; 116 117 va_start(p, s); 118 verror_msg(s, p); 119 va_end(p); 120 putc('\n', stderr); 121} 122 123extern void error_msg_and_die(const char *s, ...) 124{ 125 va_list p; 126 127 va_start(p, s); 128 verror_msg(s, p); 129 va_end(p); 130 putc('\n', stderr); 131 exit(EXIT_FAILURE); 132} 133 134static void vperror_msg(const char *s, va_list p) 135{ 136 int err=errno; 137 if(s == 0) s = ""; 138 verror_msg(s, p); 139 if (*s) s = ": "; 140 fprintf(stderr, "%s%s\n", s, strerror(err)); 141} 142 143extern void perror_msg(const char *s, ...) 144{ 145 va_list p; 146 147 va_start(p, s); 148 vperror_msg(s, p); 149 va_end(p); 150} 151 152extern void perror_msg_and_die(const char *s, ...) 153{ 154 va_list p; 155 156 va_start(p, s); 157 vperror_msg(s, p); 158 va_end(p); 159 exit(EXIT_FAILURE); 160} 161 162#if defined BB_INIT || defined BB_MKSWAP || defined BB_MOUNT || defined BB_NFSMOUNT || defined BB_FEATURE_IFCONFIG_STATUS 163/* Returns kernel version encoded as major*65536 + minor*256 + patch, 164 * so, for example, to check if the kernel is greater than 2.2.11: 165 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> } 166 */ 167extern int get_kernel_revision(void) 168{ 169 struct utsname name; 170 char *s; 171 int i, r; 172 173 if (uname(&name) == -1) { 174 perror_msg("cannot get system information"); 175 return (0); 176 } 177 178 s = name.release; 179 r = 0; 180 for (i=0 ; i<3 ; i++) { 181 r = r * 256 + atoi(strtok(s, ".")); 182 s = NULL; 183 } 184 return r; 185} 186#endif /* BB_INIT */ 187 188 189 190#if defined BB_FREE || defined BB_INIT || defined BB_UNAME || defined BB_UPTIME 191_syscall1(int, sysinfo, struct sysinfo *, info); 192#endif /* BB_INIT */ 193 194#if defined BB_MOUNT || defined BB_UMOUNT 195 196/* Include our own version of <sys/mount.h>, since libc5 doesn't 197 * know about umount2 */ 198extern _syscall1(int, umount, const char *, special_file); 199extern _syscall5(int, mount, const char *, special_file, const char *, dir, 200 const char *, fstype, unsigned long int, rwflag, const void *, data); 201#ifndef __NR_umount2 202# warning This kernel does not support the umount2 syscall 203# warning The umount2 system call is being stubbed out... 204 int umount2(const char * special_file, int flags) 205 { 206 /* BusyBox was compiled against a kernel that did not support 207 * the umount2 system call. To make this application work, 208 * you will need to recompile with a kernel supporting the 209 * umount2 system call. 210 */ 211 fprintf(stderr, "\n\nTo make this application work, you will need to recompile\n"); 212 fprintf(stderr, "with a kernel supporting the umount2 system call. -Erik\n\n"); 213 errno=ENOSYS; 214 return -1; 215 } 216# else 217 extern _syscall2(int, umount2, const char *, special_file, int, flags); 218# endif 219#endif 220 221 222 223#if defined BB_FEATURE_NEW_MODULE_INTERFACE && ( defined BB_INSMOD || defined BB_LSMOD ) 224#ifndef __NR_query_module 225static const int __NR_query_module = 167; 226#endif 227_syscall5(int, query_module, const char *, name, int, which, 228 void *, buf, size_t, bufsize, size_t*, ret); 229#endif 230 231 232#if defined(BB_CP_MV) || defined(BB_DU) 233 234#define HASH_SIZE 311 /* Should be prime */ 235#define hash_inode(i) ((i) % HASH_SIZE) 236 237static ino_dev_hashtable_bucket_t *ino_dev_hashtable[HASH_SIZE]; 238 239/* 240 * Return 1 if statbuf->st_ino && statbuf->st_dev are recorded in 241 * `ino_dev_hashtable', else return 0 242 * 243 * If NAME is a non-NULL pointer to a character pointer, and there is 244 * a match, then set *NAME to the value of the name slot in that 245 * bucket. 246 */ 247int is_in_ino_dev_hashtable(const struct stat *statbuf, char **name) 248{ 249 ino_dev_hashtable_bucket_t *bucket; 250 251 bucket = ino_dev_hashtable[hash_inode(statbuf->st_ino)]; 252 while (bucket != NULL) { 253 if ((bucket->ino == statbuf->st_ino) && 254 (bucket->dev == statbuf->st_dev)) 255 { 256 if (name) *name = bucket->name; 257 return 1; 258 } 259 bucket = bucket->next; 260 } 261 return 0; 262} 263 264/* Add statbuf to statbuf hash table */ 265void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) 266{ 267 int i; 268 size_t s; 269 ino_dev_hashtable_bucket_t *bucket; 270 271 i = hash_inode(statbuf->st_ino); 272 s = name ? strlen(name) : 0; 273 bucket = xmalloc(sizeof(ino_dev_hashtable_bucket_t) + s); 274 bucket->ino = statbuf->st_ino; 275 bucket->dev = statbuf->st_dev; 276 if (name) 277 strcpy(bucket->name, name); 278 else 279 bucket->name[0] = '\0'; 280 bucket->next = ino_dev_hashtable[i]; 281 ino_dev_hashtable[i] = bucket; 282} 283 284/* Clear statbuf hash table */ 285void reset_ino_dev_hashtable(void) 286{ 287 int i; 288 ino_dev_hashtable_bucket_t *bucket; 289 290 for (i = 0; i < HASH_SIZE; i++) { 291 while (ino_dev_hashtable[i] != NULL) { 292 bucket = ino_dev_hashtable[i]->next; 293 free(ino_dev_hashtable[i]); 294 ino_dev_hashtable[i] = bucket; 295 } 296 } 297} 298 299#endif /* BB_CP_MV || BB_DU */ 300 301#if defined(BB_CP_MV) || defined(BB_DU) || defined(BB_LN) || defined(BB_DPKG_DEB) 302/* 303 * Return TRUE if a fileName is a directory. 304 * Nonexistant files return FALSE. 305 */ 306int is_directory(const char *fileName, const int followLinks, struct stat *statBuf) 307{ 308 int status; 309 int didMalloc = 0; 310 311 if (statBuf == NULL) { 312 statBuf = (struct stat *)xmalloc(sizeof(struct stat)); 313 ++didMalloc; 314 } 315 316 if (followLinks == TRUE) 317 status = stat(fileName, statBuf); 318 else 319 status = lstat(fileName, statBuf); 320 321 if (status < 0 || !(S_ISDIR(statBuf->st_mode))) { 322 status = FALSE; 323 } 324 else status = TRUE; 325 326 if (didMalloc) { 327 free(statBuf); 328 statBuf = NULL; 329 } 330 return status; 331} 332#endif 333 334#if defined BB_AR || defined BB_CP_MV 335/* 336 * Copy chunksize bytes between two file descriptors 337 */ 338int copy_file_chunk(int srcfd, int dstfd, size_t chunksize) 339{ 340 size_t size; 341 char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */ 342 343 while (chunksize > 0) { 344 if (chunksize > BUFSIZ) 345 size = BUFSIZ; 346 else 347 size = chunksize; 348 if (full_write(dstfd, buffer, full_read(srcfd, buffer, size)) < size) 349 return(FALSE); 350 chunksize -= size; 351 } 352 return (TRUE); 353} 354#endif 355 356 357#if defined(BB_CP_MV) || defined BB_DPKG 358/* 359 * Copy one file to another, while possibly preserving its modes, times, and 360 * modes. Returns TRUE if successful, or FALSE on a failure with an error 361 * message output. (Failure is not indicated if attributes cannot be set.) 362 * -Erik Andersen 363 */ 364int 365copy_file(const char *srcName, const char *destName, 366 int setModes, int followLinks, int forceFlag) 367{ 368 int rfd; 369 int wfd; 370 int status; 371 struct stat srcStatBuf; 372 struct stat dstStatBuf; 373 struct utimbuf times; 374 375 if (followLinks == TRUE) 376 status = stat(srcName, &srcStatBuf); 377 else 378 status = lstat(srcName, &srcStatBuf); 379 380 if (status < 0) { 381 perror_msg("%s", srcName); 382 return FALSE; 383 } 384 385 if (followLinks == TRUE) 386 status = stat(destName, &dstStatBuf); 387 else 388 status = lstat(destName, &dstStatBuf); 389 390 if (status < 0 || forceFlag==TRUE) { 391 unlink(destName); 392 dstStatBuf.st_ino = -1; 393 dstStatBuf.st_dev = -1; 394 } 395 396 if ((srcStatBuf.st_dev == dstStatBuf.st_dev) && 397 (srcStatBuf.st_ino == dstStatBuf.st_ino)) { 398 error_msg("Copying file \"%s\" to itself", srcName); 399 return FALSE; 400 } 401 402 if (S_ISDIR(srcStatBuf.st_mode)) { 403 //fprintf(stderr, "copying directory %s to %s\n", srcName, destName); 404 /* Make sure the directory is writable */ 405 status = mkdir(destName, 0777777 ^ umask(0)); 406 if (status < 0 && errno != EEXIST) { 407 perror_msg("%s", destName); 408 return FALSE; 409 } 410 } else if (S_ISLNK(srcStatBuf.st_mode)) { 411 char link_val[BUFSIZ + 1]; 412 int link_size; 413 414 //fprintf(stderr, "copying link %s to %s\n", srcName, destName); 415 /* Warning: This could possibly truncate silently, to BUFSIZ chars */ 416 link_size = readlink(srcName, &link_val[0], BUFSIZ); 417 if (link_size < 0) { 418 perror_msg("%s", srcName); 419 return FALSE; 420 } 421 link_val[link_size] = '\0'; 422 status = symlink(link_val, destName); 423 if (status < 0) { 424 perror_msg("%s", destName); 425 return FALSE; 426 } 427#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1) 428 if (setModes == TRUE) { 429 /* Try to set owner, but fail silently like GNU cp */ 430 lchown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid); 431 } 432#endif 433 return TRUE; 434 } else if (S_ISFIFO(srcStatBuf.st_mode)) { 435 //fprintf(stderr, "copying fifo %s to %s\n", srcName, destName); 436 if (mkfifo(destName, 0644) < 0) { 437 perror_msg("%s", destName); 438 return FALSE; 439 } 440 } else if (S_ISBLK(srcStatBuf.st_mode) || S_ISCHR(srcStatBuf.st_mode) 441 || S_ISSOCK(srcStatBuf.st_mode)) { 442 //fprintf(stderr, "copying soc, blk, or chr %s to %s\n", srcName, destName); 443 if (mknod(destName, srcStatBuf.st_mode, srcStatBuf.st_rdev) < 0) { 444 perror_msg("%s", destName); 445 return FALSE; 446 } 447 } else if (S_ISREG(srcStatBuf.st_mode)) { 448 //fprintf(stderr, "copying regular file %s to %s\n", srcName, destName); 449 rfd = open(srcName, O_RDONLY); 450 if (rfd < 0) { 451 perror_msg("%s", srcName); 452 return FALSE; 453 } 454 455 wfd = open(destName, O_WRONLY | O_CREAT | O_TRUNC, 456 srcStatBuf.st_mode); 457 if (wfd < 0) { 458 perror_msg("%s", destName); 459 close(rfd); 460 return FALSE; 461 } 462 463 if (copy_file_chunk(rfd, wfd, srcStatBuf.st_size)==FALSE) 464 goto error_exit; 465 466 close(rfd); 467 if (close(wfd) < 0) { 468 return FALSE; 469 } 470 } 471 472 if (setModes == TRUE) { 473 /* This is fine, since symlinks never get here */ 474 if (chown(destName, srcStatBuf.st_uid, srcStatBuf.st_gid) < 0) 475 perror_msg_and_die("%s", destName); 476 if (chmod(destName, srcStatBuf.st_mode) < 0) 477 perror_msg_and_die("%s", destName); 478 times.actime = srcStatBuf.st_atime; 479 times.modtime = srcStatBuf.st_mtime; 480 if (utime(destName, ×) < 0) 481 perror_msg_and_die("%s", destName); 482 } 483 484 return TRUE; 485 486 error_exit: 487 perror_msg("%s", destName); 488 close(rfd); 489 close(wfd); 490 491 return FALSE; 492} 493#endif /* BB_CP_MV */ 494 495 496 497#if defined BB_TAR || defined BB_LS ||defined BB_AR 498 499#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f) 500#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)]) 501 502/* The special bits. If set, display SMODE0/1 instead of MODE0/1 */ 503static const mode_t SBIT[] = { 504 0, 0, S_ISUID, 505 0, 0, S_ISGID, 506 0, 0, S_ISVTX 507}; 508 509/* The 9 mode bits to test */ 510static const mode_t MBIT[] = { 511 S_IRUSR, S_IWUSR, S_IXUSR, 512 S_IRGRP, S_IWGRP, S_IXGRP, 513 S_IROTH, S_IWOTH, S_IXOTH 514}; 515 516static const char MODE1[] = "rwxrwxrwx"; 517static const char MODE0[] = "---------"; 518static const char SMODE1[] = "..s..s..t"; 519static const char SMODE0[] = "..S..S..T"; 520 521/* 522 * Return the standard ls-like mode string from a file mode. 523 * This is static and so is overwritten on each call. 524 */ 525const char *mode_string(int mode) 526{ 527 static char buf[12]; 528 529 int i; 530 531 buf[0] = TYPECHAR(mode); 532 for (i = 0; i < 9; i++) { 533 if (mode & SBIT[i]) 534 buf[i + 1] = (mode & MBIT[i]) ? SMODE1[i] : SMODE0[i]; 535 else 536 buf[i + 1] = (mode & MBIT[i]) ? MODE1[i] : MODE0[i]; 537 } 538 return buf; 539} 540#endif /* BB_TAR || BB_LS */ 541 542 543#if defined BB_TAR || defined BB_AR 544/* 545 * Return the standard ls-like time string from a time_t 546 * This is static and so is overwritten on each call. 547 */ 548const char *time_string(time_t timeVal) 549{ 550 time_t now; 551 char *str; 552 static char buf[26]; 553 554 time(&now); 555 556 str = ctime(&timeVal); 557 558 strcpy(buf, &str[4]); 559 buf[12] = '\0'; 560 561 if ((timeVal > now) || (timeVal < now - 365 * 24 * 60 * 60L)) { 562 strcpy(&buf[7], &str[20]); 563 buf[11] = '\0'; 564 } 565 566 return buf; 567} 568#endif /* BB_TAR || BB_AR */ 569 570#if defined BB_DD || defined BB_NC || defined BB_TAIL || defined BB_TAR || defined BB_AR || defined BB_CP_MV 571/* 572 * Write all of the supplied buffer out to a file. 573 * This does multiple writes as necessary. 574 * Returns the amount written, or -1 on an error. 575 */ 576int full_write(int fd, const char *buf, int len) 577{ 578 int cc; 579 int total; 580 581 total = 0; 582 583 while (len > 0) { 584 cc = write(fd, buf, len); 585 586 if (cc < 0) 587 return -1; 588 589 buf += cc; 590 total += cc; 591 len -= cc; 592 } 593 594 return total; 595} 596#endif 597 598#if defined BB_AR || defined BB_CP_MV || defined BB_SH || defined BB_TAR 599/* 600 * Read all of the supplied buffer from a file. 601 * This does multiple reads as necessary. 602 * Returns the amount read, or -1 on an error. 603 * A short read is returned on an end of file. 604 */ 605int full_read(int fd, char *buf, int len) 606{ 607 int cc; 608 int total; 609 610 total = 0; 611 612 while (len > 0) { 613 cc = read(fd, buf, len); 614 615 if (cc < 0) 616 return -1; 617 618 if (cc == 0) 619 break; 620 621 buf += cc; 622 total += cc; 623 len -= cc; 624 } 625 626 return total; 627} 628#endif /* BB_TAR || BB_TAIL || BB_AR || BB_SH */ 629 630 631#if defined(BB_CHMOD_CHOWN_CHGRP) \ 632 || defined (BB_CP_MV) \ 633 || defined (BB_FIND) \ 634 || defined (BB_INSMOD) \ 635 || defined (BB_LS) \ 636 || defined (BB_RM) \ 637 || defined (BB_TAR) 638 639/* 640 * Walk down all the directories under the specified 641 * location, and do something (something specified 642 * by the fileAction and dirAction function pointers). 643 * 644 * Unfortunately, while nftw(3) could replace this and reduce 645 * code size a bit, nftw() wasn't supported before GNU libc 2.1, 646 * and so isn't sufficiently portable to take over since glibc2.1 647 * is so stinking huge. 648 */ 649int recursive_action(const char *fileName, 650 int recurse, int followLinks, int depthFirst, 651 int (*fileAction) (const char *fileName, 652 struct stat * statbuf, 653 void* userData), 654 int (*dirAction) (const char *fileName, 655 struct stat * statbuf, 656 void* userData), 657 void* userData) 658{ 659 int status; 660 struct stat statbuf; 661 struct dirent *next; 662 663 if (followLinks == TRUE) 664 status = stat(fileName, &statbuf); 665 else 666 status = lstat(fileName, &statbuf); 667 668 if (status < 0) { 669#ifdef BB_DEBUG_PRINT_SCAFFOLD 670 fprintf(stderr, 671 "status=%d followLinks=%d TRUE=%d\n", 672 status, followLinks, TRUE); 673#endif 674 perror_msg("%s", fileName); 675 return FALSE; 676 } 677 678 if ((followLinks == FALSE) && (S_ISLNK(statbuf.st_mode))) { 679 if (fileAction == NULL) 680 return TRUE; 681 else 682 return fileAction(fileName, &statbuf, userData); 683 } 684 685 if (recurse == FALSE) { 686 if (S_ISDIR(statbuf.st_mode)) { 687 if (dirAction != NULL) 688 return (dirAction(fileName, &statbuf, userData)); 689 else 690 return TRUE; 691 } 692 } 693 694 if (S_ISDIR(statbuf.st_mode)) { 695 DIR *dir; 696 697 if (dirAction != NULL && depthFirst == FALSE) { 698 status = dirAction(fileName, &statbuf, userData); 699 if (status == FALSE) { 700 perror_msg("%s", fileName); 701 return FALSE; 702 } else if (status == SKIP) 703 return TRUE; 704 } 705 dir = opendir(fileName); 706 if (!dir) { 707 perror_msg("%s", fileName); 708 return FALSE; 709 } 710 status = TRUE; 711 while ((next = readdir(dir)) != NULL) { 712 char nextFile[PATH_MAX]; 713 714 if ((strcmp(next->d_name, "..") == 0) 715 || (strcmp(next->d_name, ".") == 0)) { 716 continue; 717 } 718 if (strlen(fileName) + strlen(next->d_name) + 1 > PATH_MAX) { 719 error_msg(name_too_long); 720 return FALSE; 721 } 722 memset(nextFile, 0, sizeof(nextFile)); 723 if (fileName[strlen(fileName)-1] == '/') 724 sprintf(nextFile, "%s%s", fileName, next->d_name); 725 else 726 sprintf(nextFile, "%s/%s", fileName, next->d_name); 727 if (recursive_action(nextFile, TRUE, followLinks, depthFirst, 728 fileAction, dirAction, userData) == FALSE) { 729 status = FALSE; 730 } 731 } 732 closedir(dir); 733 if (dirAction != NULL && depthFirst == TRUE) { 734 if (dirAction(fileName, &statbuf, userData) == FALSE) { 735 perror_msg("%s", fileName); 736 return FALSE; 737 } 738 } 739 if (status == FALSE) 740 return FALSE; 741 } else { 742 if (fileAction == NULL) 743 return TRUE; 744 else 745 return fileAction(fileName, &statbuf, userData); 746 } 747 return TRUE; 748} 749 750#endif /* BB_CHMOD_CHOWN_CHGRP || BB_CP_MV || BB_FIND || BB_LS || BB_INSMOD */ 751 752 753 754#if defined(BB_TAR) || defined(BB_MKDIR) 755/* 756 * Attempt to create the directories along the specified path, except for 757 * the final component. The mode is given for the final directory only, 758 * while all previous ones get default protections. Errors are not reported 759 * here, as failures to restore files can be reported later. 760 */ 761extern int create_path(const char *name, int mode) 762{ 763 char *cp; 764 char *cpOld; 765 char buf[BUFSIZ + 1]; 766 int retVal = 0; 767 768 strcpy(buf, name); 769 for (cp = buf; *cp == '/'; cp++); 770 cp = strchr(cp, '/'); 771 while (cp) { 772 cpOld = cp; 773 cp = strchr(cp + 1, '/'); 774 *cpOld = '\0'; 775 retVal = mkdir(buf, cp ? 0777 : mode); 776 if (retVal != 0 && errno != EEXIST) { 777 perror_msg("%s", buf); 778 return FALSE; 779 } 780 *cpOld = '/'; 781 } 782 return TRUE; 783} 784#endif /* BB_TAR || BB_MKDIR */ 785 786 787 788#if defined(BB_CHMOD_CHOWN_CHGRP) || defined(BB_MKDIR) \ 789 || defined (BB_MKFIFO) || defined (BB_MKNOD) || defined (BB_AR) 790/* [ugoa]{+|-|=}[rwxst] */ 791 792extern int parse_mode(const char *s, mode_t * theMode) 793{ 794 static const mode_t group_set[] = { 795 S_ISUID | S_IRWXU, /* u */ 796 S_ISGID | S_IRWXG, /* g */ 797 S_IRWXO, /* o */ 798 S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO /* a */ 799 }; 800 801 static const mode_t mode_set[] = { 802 S_IRUSR | S_IRGRP | S_IROTH, /* r */ 803 S_IWUSR | S_IWGRP | S_IWOTH, /* w */ 804 S_IXUSR | S_IXGRP | S_IXOTH, /* x */ 805 S_ISUID | S_ISGID, /* s */ 806 S_ISVTX /* t */ 807 }; 808 809 static const char group_string[] = "ugoa"; 810 static const char mode_string[] = "rwxst"; 811 812 const char *p; 813 814 mode_t andMode = 815 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO; 816 mode_t orMode = 0; 817 mode_t mode; 818 mode_t groups; 819 char type; 820 char c; 821 822 if (s==NULL) { 823 return (FALSE); 824 } 825 826 do { 827 mode = 0; 828 groups = 0; 829 NEXT_GROUP: 830 if ((c = *s++) == '\0') { 831 return -1; 832 } 833 for (p=group_string ; *p ; p++) { 834 if (*p == c) { 835 groups |= group_set[(int)(p-group_string)]; 836 goto NEXT_GROUP; 837 } 838 } 839 switch (c) { 840 case '=': 841 case '+': 842 case '-': 843 type = c; 844 if (groups == 0) { /* The default is "all" */ 845 groups |= S_ISUID | S_ISGID | S_ISVTX 846 | S_IRWXU | S_IRWXG | S_IRWXO; 847 } 848 break; 849 default: 850 if ((c < '0') || (c > '7') || (mode | groups)) { 851 return (FALSE); 852 } else { 853 *theMode = strtol(--s, NULL, 8); 854 return (TRUE); 855 } 856 } 857 858 NEXT_MODE: 859 if (((c = *s++) != '\0') && (c != ',')) { 860 for (p=mode_string ; *p ; p++) { 861 if (*p == c) { 862 mode |= mode_set[(int)(p-mode_string)]; 863 goto NEXT_MODE; 864 } 865 } 866 break; /* We're done so break out of loop.*/ 867 } 868 switch (type) { 869 case '=': 870 andMode &= ~(groups); /* Now fall through. */ 871 case '+': 872 orMode |= mode & groups; 873 break; 874 case '-': 875 andMode &= ~(mode & groups); 876 orMode &= ~(mode & groups); 877 break; 878 } 879 } while (c == ','); 880 881 *theMode &= andMode; 882 *theMode |= orMode; 883 884 return TRUE; 885} 886 887#endif 888/* BB_CHMOD_CHOWN_CHGRP || BB_MKDIR || BB_MKFIFO || BB_MKNOD */ 889 890 891 892 893 894#if defined BB_CHMOD_CHOWN_CHGRP || defined BB_PS || defined BB_LS \ 895 || defined BB_TAR || defined BB_ID || defined BB_LOGGER \ 896 || defined BB_LOGNAME || defined BB_WHOAMI || defined BB_SH 897 898#if defined BB_CHMOD_CHOWN_CHGRP || defined BB_ID 899/* returns a uid given a username */ 900long my_getpwnam(const char *name) 901{ 902 struct passwd *myuser; 903 904 myuser = getpwnam(name); 905 if (myuser==NULL) 906 error_msg_and_die("unknown user name: %s", name); 907 908 return myuser->pw_uid; 909} 910 911/* returns a gid given a group name */ 912long my_getgrnam(const char *name) 913{ 914 struct group *mygroup; 915 916 mygroup = getgrnam(name); 917 if (mygroup==NULL) 918 error_msg_and_die("unknown group name: %s", name); 919 920 return (mygroup->gr_gid); 921} 922#endif 923 924/* gets a username given a uid */ 925void my_getpwuid(char *name, long uid) 926{ 927 struct passwd *myuser; 928 929 myuser = getpwuid(uid); 930 if (myuser==NULL) 931 sprintf(name, "%-8ld ", (long)uid); 932 else 933 strcpy(name, myuser->pw_name); 934} 935 936/* gets a groupname given a gid */ 937void my_getgrgid(char *group, long gid) 938{ 939 struct group *mygroup; 940 941 mygroup = getgrgid(gid); 942 if (mygroup==NULL) 943 sprintf(group, "%-8ld ", (long)gid); 944 else 945 strcpy(group, mygroup->gr_name); 946} 947 948#if defined BB_ID 949/* gets a gid given a user name */ 950long my_getpwnamegid(const char *name) 951{ 952 struct group *mygroup; 953 struct passwd *myuser; 954 955 myuser=getpwnam(name); 956 if (myuser==NULL) 957 error_msg_and_die("unknown user name: %s", name); 958 959 mygroup = getgrgid(myuser->pw_gid); 960 if (mygroup==NULL) 961 error_msg_and_die("unknown gid %ld", (long)myuser->pw_gid); 962 963 return mygroup->gr_gid; 964} 965#endif /* BB_ID */ 966#endif 967 /* BB_CHMOD_CHOWN_CHGRP || BB_PS || BB_LS || BB_TAR \ 968 || BB_ID || BB_LOGGER || BB_LOGNAME || BB_WHOAMI */ 969 970 971#if (defined BB_CHVT) || (defined BB_DEALLOCVT) || (defined BB_SETKEYCODES) 972 973/* From <linux/kd.h> */ 974static const int KDGKBTYPE = 0x4B33; /* get keyboard type */ 975static const int KB_84 = 0x01; 976static const int KB_101 = 0x02; /* this is what we always answer */ 977 978int is_a_console(int fd) 979{ 980 char arg; 981 982 arg = 0; 983 return (ioctl(fd, KDGKBTYPE, &arg) == 0 984 && ((arg == KB_101) || (arg == KB_84))); 985} 986 987static int open_a_console(char *fnam) 988{ 989 int fd; 990 991 /* try read-only */ 992 fd = open(fnam, O_RDWR); 993 994 /* if failed, try read-only */ 995 if (fd < 0 && errno == EACCES) 996 fd = open(fnam, O_RDONLY); 997 998 /* if failed, try write-only */ 999 if (fd < 0 && errno == EACCES) 1000 fd = open(fnam, O_WRONLY); 1001 1002 /* if failed, fail */ 1003 if (fd < 0) 1004 return -1; 1005 1006 /* if not a console, fail */ 1007 if (!is_a_console(fd)) { 1008 close(fd); 1009 return -1; 1010 } 1011 1012 /* success */ 1013 return fd; 1014} 1015 1016/* 1017 * Get an fd for use with kbd/console ioctls. 1018 * We try several things because opening /dev/console will fail 1019 * if someone else used X (which does a chown on /dev/console). 1020 * 1021 * if tty_name is non-NULL, try this one instead. 1022 */ 1023 1024int get_console_fd(char *tty_name) 1025{ 1026 int fd; 1027 1028 if (tty_name) { 1029 if (-1 == (fd = open_a_console(tty_name))) 1030 return -1; 1031 else 1032 return fd; 1033 } 1034 1035 fd = open_a_console("/dev/tty"); 1036 if (fd >= 0) 1037 return fd; 1038 1039 fd = open_a_console("/dev/tty0"); 1040 if (fd >= 0) 1041 return fd; 1042 1043 fd = open_a_console("/dev/console"); 1044 if (fd >= 0) 1045 return fd; 1046 1047 for (fd = 0; fd < 3; fd++) 1048 if (is_a_console(fd)) 1049 return fd; 1050 1051 error_msg("Couldnt get a file descriptor referring to the console"); 1052 return -1; /* total failure */ 1053} 1054 1055 1056#endif /* BB_CHVT || BB_DEALLOCVT || BB_SETKEYCODES */ 1057 1058 1059#if defined BB_FIND || defined BB_INSMOD 1060/* 1061 * Routine to see if a text string is matched by a wildcard pattern. 1062 * Returns TRUE if the text is matched, or FALSE if it is not matched 1063 * or if the pattern is invalid. 1064 * * matches zero or more characters 1065 * ? matches a single character 1066 * [abc] matches 'a', 'b' or 'c' 1067 * \c quotes character c 1068 * Adapted from code written by Ingo Wilken, and 1069 * then taken from sash, Copyright (c) 1999 by David I. Bell 1070 * Permission is granted to use, distribute, or modify this source, 1071 * provided that this copyright notice remains intact. 1072 * Permission to distribute this code under the GPL has been granted. 1073 */ 1074extern int check_wildcard_match(const char *text, const char *pattern) 1075{ 1076 const char *retryPat; 1077 const char *retryText; 1078 int ch; 1079 int found; 1080 int len; 1081 1082 retryPat = NULL; 1083 retryText = NULL; 1084 1085 while (*text || *pattern) { 1086 ch = *pattern++; 1087 1088 switch (ch) { 1089 case '*': 1090 retryPat = pattern; 1091 retryText = text; 1092 break; 1093 1094 case '[': 1095 found = FALSE; 1096 1097 while ((ch = *pattern++) != ']') { 1098 if (ch == '\\') 1099 ch = *pattern++; 1100 1101 if (ch == '\0') 1102 return FALSE; 1103 1104 if (*text == ch) 1105 found = TRUE; 1106 } 1107 len=strlen(text); 1108 if (found == FALSE && len!=0) { 1109 return FALSE; 1110 } 1111 if (found == TRUE) { 1112 if (strlen(pattern)==0 && len==1) { 1113 return TRUE; 1114 } 1115 if (len!=0) { 1116 text++; 1117 continue; 1118 } 1119 } 1120 1121 /* fall into next case */ 1122 1123 case '?': 1124 if (*text++ == '\0') 1125 return FALSE; 1126 1127 break; 1128 1129 case '\\': 1130 ch = *pattern++; 1131 1132 if (ch == '\0') 1133 return FALSE; 1134 1135 /* fall into next case */ 1136 1137 default: 1138 if (*text == ch) { 1139 if (*text) 1140 text++; 1141 break; 1142 } 1143 1144 if (*text) { 1145 pattern = retryPat; 1146 text = ++retryText; 1147 break; 1148 } 1149 1150 return FALSE; 1151 } 1152 1153 if (pattern == NULL) 1154 return FALSE; 1155 } 1156 1157 return TRUE; 1158} 1159#endif /* BB_FIND || BB_INSMOD */ 1160 1161 1162 1163 1164#if defined BB_DF || defined BB_MTAB 1165#include <mntent.h> 1166/* 1167 * Given a block device, find the mount table entry if that block device 1168 * is mounted. 1169 * 1170 * Given any other file (or directory), find the mount table entry for its 1171 * filesystem. 1172 */ 1173extern struct mntent *find_mount_point(const char *name, const char *table) 1174{ 1175 struct stat s; 1176 dev_t mountDevice; 1177 FILE *mountTable; 1178 struct mntent *mountEntry; 1179 1180 if (stat(name, &s) != 0) 1181 return 0; 1182 1183 if ((s.st_mode & S_IFMT) == S_IFBLK) 1184 mountDevice = s.st_rdev; 1185 else 1186 mountDevice = s.st_dev; 1187 1188 1189 if ((mountTable = setmntent(table, "r")) == 0) 1190 return 0; 1191 1192 while ((mountEntry = getmntent(mountTable)) != 0) { 1193 if (strcmp(name, mountEntry->mnt_dir) == 0 1194 || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ 1195 break; 1196 if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ 1197 break; 1198 if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ 1199 break; 1200 } 1201 endmntent(mountTable); 1202 return mountEntry; 1203} 1204#endif /* BB_DF || BB_MTAB */ 1205 1206#if defined BB_INIT || defined BB_SYSLOGD 1207/* try to open up the specified device */ 1208extern int device_open(char *device, int mode) 1209{ 1210 int m, f, fd = -1; 1211 1212 m = mode | O_NONBLOCK; 1213 1214 /* Retry up to 5 times */ 1215 for (f = 0; f < 5; f++) 1216 if ((fd = open(device, m, 0600)) >= 0) 1217 break; 1218 if (fd < 0) 1219 return fd; 1220 /* Reset original flags. */ 1221 if (m != mode) 1222 fcntl(fd, F_SETFL, mode); 1223 return fd; 1224} 1225#endif /* BB_INIT BB_SYSLOGD */ 1226 1227 1228#if defined BB_KILLALL || ( defined BB_FEATURE_LINUXRC && ( defined BB_HALT || defined BB_REBOOT || defined BB_POWEROFF )) 1229#ifdef BB_FEATURE_USE_DEVPS_PATCH 1230#include <linux/devps.h> /* For Erik's nifty devps device driver */ 1231#endif 1232 1233#if defined BB_FEATURE_USE_DEVPS_PATCH 1234/* find_pid_by_name() 1235 * 1236 * This finds the pid of the specified process, 1237 * by using the /dev/ps device driver. 1238 * 1239 * Returns a list of all matching PIDs 1240 */ 1241extern pid_t* find_pid_by_name( char* pidName) 1242{ 1243 int fd, i, j; 1244 char device[] = "/dev/ps"; 1245 pid_t num_pids; 1246 pid_t* pid_array = NULL; 1247 pid_t* pidList=NULL; 1248 1249 /* open device */ 1250 fd = open(device, O_RDONLY); 1251 if (fd < 0) 1252 perror_msg_and_die("open failed for `%s'", device); 1253 1254 /* Find out how many processes there are */ 1255 if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0) 1256 perror_msg_and_die("\nDEVPS_GET_PID_LIST"); 1257 1258 /* Allocate some memory -- grab a few extras just in case 1259 * some new processes start up while we wait. The kernel will 1260 * just ignore any extras if we give it too many, and will trunc. 1261 * the list if we give it too few. */ 1262 pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t)); 1263 pid_array[0] = num_pids+10; 1264 1265 /* Now grab the pid list */ 1266 if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0) 1267 perror_msg_and_die("\nDEVPS_GET_PID_LIST"); 1268 1269 /* Now search for a match */ 1270 for (i=1, j=0; i<pid_array[0] ; i++) { 1271 char* p; 1272 struct pid_info info; 1273 1274 info.pid = pid_array[i]; 1275 if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0) 1276 perror_msg_and_die("\nDEVPS_GET_PID_INFO"); 1277 1278 /* Make sure we only match on the process name */ 1279 p=info.command_line+1; 1280 while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) { 1281 (p)++; 1282 } 1283 if (isspace(*(p))) 1284 *p='\0'; 1285 1286 if ((strstr(info.command_line, pidName) != NULL) 1287 && (strlen(pidName) == strlen(info.command_line))) { 1288 pidList=xrealloc( pidList, sizeof(pid_t) * (j+2)); 1289 pidList[j++]=info.pid; 1290 } 1291 } 1292 if (pidList) 1293 pidList[j]=0; 1294 1295 /* Free memory */ 1296 free( pid_array); 1297 1298 /* close device */ 1299 if (close (fd) != 0) 1300 perror_msg_and_die("close failed for `%s'", device); 1301 1302 return pidList; 1303} 1304#else /* BB_FEATURE_USE_DEVPS_PATCH */ 1305 1306/* find_pid_by_name() 1307 * 1308 * This finds the pid of the specified process. 1309 * Currently, it's implemented by rummaging through 1310 * the proc filesystem. 1311 * 1312 * Returns a list of all matching PIDs 1313 */ 1314extern pid_t* find_pid_by_name( char* pidName) 1315{ 1316 DIR *dir; 1317 struct dirent *next; 1318 pid_t* pidList=NULL; 1319 int i=0; 1320 1321 dir = opendir("/proc"); 1322 if (!dir) 1323 perror_msg_and_die("Cannot open /proc"); 1324 1325 while ((next = readdir(dir)) != NULL) { 1326 FILE *status; 1327 char filename[256]; 1328 char buffer[256]; 1329 1330 /* If it isn't a number, we don't want it */ 1331 if (!isdigit(*next->d_name)) 1332 continue; 1333 1334 sprintf(filename, "/proc/%s/cmdline", next->d_name); 1335 status = fopen(filename, "r"); 1336 if (!status) { 1337 continue; 1338 } 1339 fgets(buffer, 256, status); 1340 fclose(status); 1341 1342 if (strstr(get_last_path_component(buffer), pidName) != NULL) { 1343 pidList=xrealloc( pidList, sizeof(pid_t) * (i+2)); 1344 pidList[i++]=strtol(next->d_name, NULL, 0); 1345 } 1346 } 1347 1348 if (pidList) 1349 pidList[i]=0; 1350 return pidList; 1351} 1352#endif /* BB_FEATURE_USE_DEVPS_PATCH */ 1353#endif /* BB_KILLALL || ( BB_FEATURE_LINUXRC && ( BB_HALT || BB_REBOOT || BB_POWEROFF )) */ 1354 1355#ifndef DMALLOC 1356/* this should really be farmed out to libbusybox.a */ 1357extern void *xmalloc(size_t size) 1358{ 1359 void *ptr = malloc(size); 1360 1361 if (!ptr) 1362 error_msg_and_die(memory_exhausted); 1363 return ptr; 1364} 1365 1366extern void *xrealloc(void *old, size_t size) 1367{ 1368 void *ptr = realloc(old, size); 1369 if (!ptr) 1370 error_msg_and_die(memory_exhausted); 1371 return ptr; 1372} 1373 1374extern void *xcalloc(size_t nmemb, size_t size) 1375{ 1376 void *ptr = calloc(nmemb, size); 1377 if (!ptr) 1378 error_msg_and_die(memory_exhausted); 1379 return ptr; 1380} 1381#endif 1382 1383#if defined BB_NFSMOUNT || defined BB_LS || defined BB_SH || \ 1384 defined BB_WGET || defined BB_DPKG_DEB || defined BB_TAR || \ 1385 defined BB_LN 1386# ifndef DMALLOC 1387extern char * xstrdup (const char *s) { 1388 char *t; 1389 1390 if (s == NULL) 1391 return NULL; 1392 1393 t = strdup (s); 1394 1395 if (t == NULL) 1396 error_msg_and_die(memory_exhausted); 1397 1398 return t; 1399} 1400# endif 1401#endif 1402 1403#if defined BB_NFSMOUNT 1404extern char * xstrndup (const char *s, int n) { 1405 char *t; 1406 1407 if (s == NULL) 1408 error_msg_and_die("xstrndup bug"); 1409 1410 t = xmalloc(++n); 1411 1412 return safe_strncpy(t,s,n); 1413} 1414#endif 1415 1416#if defined BB_IFCONFIG || defined BB_ROUTE || defined BB_NFSMOUNT || \ 1417 defined BB_FEATURE_MOUNT_LOOP 1418/* Like strncpy but make sure the resulting string is always 0 terminated. */ 1419extern char * safe_strncpy(char *dst, const char *src, size_t size) 1420{ 1421 dst[size-1] = '\0'; 1422 return strncpy(dst, src, size-1); 1423} 1424#endif 1425 1426#if (__GLIBC__ < 2) && (defined BB_SYSLOGD || defined BB_INIT) 1427extern int vdprintf(int d, const char *format, va_list ap) 1428{ 1429 char buf[BUF_SIZE]; 1430 int len; 1431 1432 len = vsprintf(buf, format, ap); 1433 return write(d, buf, len); 1434} 1435#endif /* BB_SYSLOGD */ 1436 1437 1438#if defined BB_FEATURE_MOUNT_LOOP 1439#include <fcntl.h> 1440#include "loop.h" /* Pull in loop device support */ 1441 1442extern int del_loop(const char *device) 1443{ 1444 int fd; 1445 1446 if ((fd = open(device, O_RDONLY)) < 0) { 1447 perror_msg("%s", device); 1448 return (FALSE); 1449 } 1450 if (ioctl(fd, LOOP_CLR_FD, 0) < 0) { 1451 perror_msg("ioctl: LOOP_CLR_FD"); 1452 return (FALSE); 1453 } 1454 close(fd); 1455 return (TRUE); 1456} 1457 1458extern int set_loop(const char *device, const char *file, int offset, 1459 int *loopro) 1460{ 1461 struct loop_info loopinfo; 1462 int fd, ffd, mode; 1463 1464 mode = *loopro ? O_RDONLY : O_RDWR; 1465 if ((ffd = open(file, mode)) < 0 && !*loopro 1466 && (errno != EROFS || (ffd = open(file, mode = O_RDONLY)) < 0)) { 1467 perror_msg("%s", file); 1468 return 1; 1469 } 1470 if ((fd = open(device, mode)) < 0) { 1471 close(ffd); 1472 perror_msg("%s", device); 1473 return 1; 1474 } 1475 *loopro = (mode == O_RDONLY); 1476 1477 memset(&loopinfo, 0, sizeof(loopinfo)); 1478 safe_strncpy(loopinfo.lo_name, file, LO_NAME_SIZE); 1479 1480 loopinfo.lo_offset = offset; 1481 1482 loopinfo.lo_encrypt_key_size = 0; 1483 if (ioctl(fd, LOOP_SET_FD, ffd) < 0) { 1484 perror_msg("ioctl: LOOP_SET_FD"); 1485 close(fd); 1486 close(ffd); 1487 return 1; 1488 } 1489 if (ioctl(fd, LOOP_SET_STATUS, &loopinfo) < 0) { 1490 (void) ioctl(fd, LOOP_CLR_FD, 0); 1491 perror_msg("ioctl: LOOP_SET_STATUS"); 1492 close(fd); 1493 close(ffd); 1494 return 1; 1495 } 1496 close(fd); 1497 close(ffd); 1498 return 0; 1499} 1500 1501extern char *find_unused_loop_device(void) 1502{ 1503 char dev[20]; 1504 int i, fd; 1505 struct stat statbuf; 1506 struct loop_info loopinfo; 1507 1508 for (i = 0; i <= 7; i++) { 1509 sprintf(dev, "/dev/loop%d", i); 1510 if (stat(dev, &statbuf) == 0 && S_ISBLK(statbuf.st_mode)) { 1511 if ((fd = open(dev, O_RDONLY)) >= 0) { 1512 if (ioctl(fd, LOOP_GET_STATUS, &loopinfo) != 0) { 1513 if (errno == ENXIO) { /* probably free */ 1514 close(fd); 1515 return strdup(dev); 1516 } 1517 } 1518 close(fd); 1519 } 1520 } 1521 } 1522 return NULL; 1523} 1524#endif /* BB_FEATURE_MOUNT_LOOP */ 1525 1526#if defined BB_MOUNT || defined BB_DF || ( defined BB_UMOUNT && ! defined BB_MTAB) 1527extern int find_real_root_device_name(char* name) 1528{ 1529 DIR *dir; 1530 struct dirent *entry; 1531 struct stat statBuf, rootStat; 1532 char fileName[BUFSIZ]; 1533 1534 if (stat("/", &rootStat) != 0) { 1535 error_msg("could not stat '/'"); 1536 return( FALSE); 1537 } 1538 1539 dir = opendir("/dev"); 1540 if (!dir) { 1541 error_msg("could not open '/dev'"); 1542 return( FALSE); 1543 } 1544 1545 while((entry = readdir(dir)) != NULL) { 1546 1547 /* Must skip ".." since that is "/", and so we 1548 * would get a false positive on ".." */ 1549 if (strcmp(entry->d_name, "..") == 0) 1550 continue; 1551 1552 snprintf( fileName, strlen(name)+1, "/dev/%s", entry->d_name); 1553 1554 if (stat(fileName, &statBuf) != 0) 1555 continue; 1556 /* Some char devices have the same dev_t as block 1557 * devices, so make sure this is a block device */ 1558 if (! S_ISBLK(statBuf.st_mode)) 1559 continue; 1560 if (statBuf.st_rdev == rootStat.st_rdev) { 1561 strcpy(name, fileName); 1562 return ( TRUE); 1563 } 1564 } 1565 1566 return( FALSE); 1567} 1568#endif 1569 1570 1571/* get_line_from_file() - This function reads an entire line from a text file 1572 * up to a newline. It returns a malloc'ed char * which must be stored and 1573 * free'ed by the caller. */ 1574extern char *get_line_from_file(FILE *file) 1575{ 1576 static const int GROWBY = 80; /* how large we will grow strings by */ 1577 1578 int ch; 1579 int idx = 0; 1580 char *linebuf = NULL; 1581 int linebufsz = 0; 1582 1583 while (1) { 1584 ch = fgetc(file); 1585 if (ch == EOF) 1586 break; 1587 /* grow the line buffer as necessary */ 1588 while (idx > linebufsz-2) 1589 linebuf = xrealloc(linebuf, linebufsz += GROWBY); 1590 linebuf[idx++] = (char)ch; 1591 if ((char)ch == '\n') 1592 break; 1593 } 1594 1595 if (idx == 0) 1596 return NULL; 1597 1598 linebuf[idx] = 0; 1599 return linebuf; 1600} 1601 1602#if defined BB_CAT 1603extern void print_file(FILE *file) 1604{ 1605 int c; 1606 1607 while ((c = getc(file)) != EOF) 1608 putc(c, stdout); 1609 fclose(file); 1610 fflush(stdout); 1611} 1612 1613extern int print_file_by_name(char *filename) 1614{ 1615 FILE *file; 1616 if ((file = wfopen(filename, "r")) == NULL) 1617 return FALSE; 1618 print_file(file); 1619 return TRUE; 1620} 1621#endif /* BB_CAT */ 1622 1623#if defined BB_ECHO || defined BB_SH || defined BB_TR 1624char process_escape_sequence(char **ptr) 1625{ 1626 static const char charmap[] = { 1627 'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0, 1628 '\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' }; 1629 1630 const char *p; 1631 char *q; 1632 int num_digits; 1633 unsigned int n; 1634 1635 n = 0; 1636 q = *ptr; 1637 1638 for ( num_digits = 0 ; num_digits < 3 ; ++num_digits) { 1639 if ((*q < '0') || (*q > '7')) { /* not a digit? */ 1640 break; 1641 } 1642 n = n * 8 + (*q++ - '0'); 1643 } 1644 1645 if (num_digits == 0) { /* mnemonic escape sequence? */ 1646 for (p=charmap ; *p ; p++) { 1647 if (*p == *q) { 1648 q++; 1649 break; 1650 } 1651 } 1652 n = *(p+(sizeof(charmap)/2)); 1653 } 1654 1655 /* doesn't hurt to fall through to here from mnemonic case */ 1656 if (n > UCHAR_MAX) { /* is octal code too big for a char? */ 1657 n /= 8; /* adjust value and */ 1658 --q; /* back up one char */ 1659 } 1660 1661 *ptr = q; 1662 return (char) n; 1663} 1664#endif 1665 1666#if defined BB_BASENAME || defined BB_LN || defined BB_SH || defined BB_INIT || \ 1667 ! defined BB_FEATURE_USE_DEVPS_PATCH || defined BB_WGET 1668char *get_last_path_component(char *path) 1669{ 1670 char *s=path+strlen(path)-1; 1671 1672 /* strip trailing slashes */ 1673 while (s != path && *s == '/') { 1674 *s-- = '\0'; 1675 } 1676 1677 /* find last component */ 1678 s = strrchr(path, '/'); 1679 if (s == NULL || s[1] == '\0') 1680 return path; 1681 else 1682 return s+1; 1683} 1684#endif 1685 1686#if defined BB_GREP || defined BB_SED 1687#include <regex.h> 1688void xregcomp(regex_t *preg, const char *regex, int cflags) 1689{ 1690 int ret; 1691 if ((ret = regcomp(preg, regex, cflags)) != 0) { 1692 int errmsgsz = regerror(ret, preg, NULL, 0); 1693 char *errmsg = xmalloc(errmsgsz); 1694 regerror(ret, preg, errmsg, errmsgsz); 1695 error_msg_and_die("xregcomp: %s", errmsg); 1696 } 1697} 1698#endif 1699 1700#if defined BB_CAT || defined BB_HEAD || defined BB_WC 1701FILE *wfopen(const char *path, const char *mode) 1702{ 1703 FILE *fp; 1704 if ((fp = fopen(path, mode)) == NULL) { 1705 perror_msg("%s", path); 1706 errno = 0; 1707 } 1708 return fp; 1709} 1710#endif 1711 1712#if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE \ 1713 || defined BB_SED || defined BB_SH || defined BB_TAR || defined BB_UNIQ \ 1714 || defined BB_WC || defined BB_CMP || defined BB_SORT || defined BB_WGET \ 1715 || defined BB_MOUNT || defined BB_ROUTE || defined BB_MKFS_MINIX 1716FILE *xfopen(const char *path, const char *mode) 1717{ 1718 FILE *fp; 1719 if ((fp = fopen(path, mode)) == NULL) 1720 perror_msg_and_die("%s", path); 1721 return fp; 1722} 1723#endif 1724 1725static int applet_name_compare(const void *x, const void *y) 1726{ 1727 const char *name = x; 1728 const struct BB_applet *applet = y; 1729 1730 return strcmp(name, applet->name); 1731} 1732 1733extern size_t NUM_APPLETS; 1734 1735struct BB_applet *find_applet_by_name(const char *name) 1736{ 1737 return bsearch(name, applets, NUM_APPLETS, sizeof(struct BB_applet), 1738 applet_name_compare); 1739} 1740 1741void run_applet_by_name(const char *name, int argc, char **argv) 1742{ 1743 /* Do a binary search to find the applet entry given the name. */ 1744 if ((applet_using = find_applet_by_name(name)) != NULL) { 1745 applet_name = applet_using->name; 1746 if (argv[1] && strcmp(argv[1], "--help") == 0) 1747 show_usage(); 1748 exit((*(applet_using->main)) (argc, argv)); 1749 } 1750} 1751 1752#if defined BB_DD || defined BB_TAIL || defined BB_STTY 1753unsigned long parse_number(const char *numstr, 1754 const struct suffix_mult *suffixes) 1755{ 1756 const struct suffix_mult *sm; 1757 unsigned long int ret; 1758 int len; 1759 char *end; 1760 1761 ret = strtoul(numstr, &end, 10); 1762 if (numstr == end) 1763 error_msg_and_die("invalid number `%s'", numstr); 1764 while (end[0] != '\0') { 1765 sm = suffixes; 1766 while ( sm != 0 ) { 1767 if(sm->suffix) { 1768 len = strlen(sm->suffix); 1769 if (strncmp(sm->suffix, end, len) == 0) { 1770 ret *= sm->mult; 1771 end += len; 1772 break; 1773 } 1774 sm++; 1775 1776 } else 1777 sm = 0; 1778 } 1779 if (sm == 0) 1780 error_msg_and_die("invalid number `%s'", numstr); 1781 } 1782 return ret; 1783} 1784#endif 1785 1786#if defined BB_DD || defined BB_NC || defined BB_TAIL 1787ssize_t safe_read(int fd, void *buf, size_t count) 1788{ 1789 ssize_t n; 1790 1791 do { 1792 n = read(fd, buf, count); 1793 } while (n < 0 && errno == EINTR); 1794 1795 return n; 1796} 1797#endif 1798 1799#ifdef BB_FEATURE_HUMAN_READABLE 1800const char *make_human_readable_str(unsigned long val, unsigned long hr) 1801{ 1802 int i=0; 1803 static char str[10] = "\0"; 1804 static const char strings[] = { 'k', 'M', 'G', 'T', 0 }; 1805 unsigned long divisor = 1; 1806 1807 if(val == 0) 1808 return("0"); 1809 if(hr) 1810 snprintf(str, 9, "%ld", val/hr); 1811 else { 1812 while(val >= divisor && i <= 4) { 1813 divisor=divisor<<10, i++; 1814 } 1815 divisor=divisor>>10, i--; 1816 snprintf(str, 9, "%.1Lf%c", (long double)(val)/divisor, strings[i]); 1817 } 1818 return(str); 1819} 1820#endif 1821 1822#if defined(BB_GREP) || defined(BB_HOSTNAME) || defined(BB_SED) || defined(BB_TAR) || defined(BB_WGET) || defined(BB_XARGS) || defined(BB_SH) 1823void chomp(char *s) 1824{ 1825 size_t len = strlen(s); 1826 1827 if (len == 0) 1828 return; 1829 1830 if (s[len-1] == '\n') 1831 s[len-1] = '\0'; 1832} 1833#endif 1834 1835#if defined(BB_KLOGD) || defined(BB_LOGGER) 1836void syslog_msg_with_name(const char *name, int facility, int pri, const char *msg) 1837{ 1838 openlog(name, 0, facility); 1839 syslog(pri, "%s", msg); 1840 closelog(); 1841} 1842 1843void syslog_msg(int facility, int pri, const char *msg) 1844{ 1845 syslog_msg_with_name(applet_using->name, facility, pri, msg); 1846} 1847#endif 1848 1849#if defined(BB_SH) 1850void trim(char *s) 1851{ 1852 /* trim trailing whitespace */ 1853 while (isspace(s[strlen(s)-1])) 1854 s[strlen(s)-1]='\0'; 1855 1856 /* trim leading whitespace */ 1857 memmove(s, &s[strspn(s, " \n\r\t\v")], strlen(s)); 1858 1859} 1860#endif 1861 1862#ifdef BB_FEATURE_RM_INTERACTIVE 1863 #if defined (BB_CP_MV) || defined (BB_RM) 1864int ask_confirmation() 1865{ 1866 int c = '\0'; 1867 int ret = 0; 1868 1869 while (c != '\n') { 1870 c = getchar(); 1871 if ( c != '\n' ) { 1872 ret = ((c=='y')||(c=='Y')) ? 1 : 0; 1873 } 1874 } 1875 return ret; 1876} 1877 #endif 1878#endif 1879 1880/* END CODE */ 1881/* 1882Local Variables: 1883c-file-style: "linux" 1884c-basic-offset: 4 1885tab-width: 4 1886End: 1887*/ 1888