source: branches/3.2/mindi-busybox/archival/tar.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 6 years ago
  • Update mindi-busybox to 1.21.1
File size: 35.2 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini tar implementation for busybox
4 *
5 * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
6 *  by Glenn McGrath
7 *
8 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
9 * ground up.  It still has remnants of the old code lying about, but it is
10 * very different now (i.e., cleaner, less global variables, etc.)
11 *
12 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
13 *
14 * Based in part in the tar implementation in sash
15 *  Copyright (c) 1999 by David I. Bell
16 *  Permission is granted to use, distribute, or modify this source,
17 *  provided that this copyright notice remains intact.
18 *  Permission to distribute sash derived code under GPL has been granted.
19 *
20 * Based in part on the tar implementation from busybox-0.28
21 *  Copyright (C) 1995 Bruce Perens
22 *
23 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
24 */
25
26/* TODO: security with -C DESTDIR option can be enhanced.
27 * Consider tar file created via:
28 * $ tar cvf bug.tar anything.txt
29 * $ ln -s /tmp symlink
30 * $ tar --append -f bug.tar symlink
31 * $ rm symlink
32 * $ mkdir symlink
33 * $ tar --append -f bug.tar symlink/evil.py
34 *
35 * This will result in an archive which contains:
36 * $ tar --list -f bug.tar
37 * anything.txt
38 * symlink
39 * symlink/evil.py
40 *
41 * Untarring it puts evil.py in '/tmp' even if the -C DESTDIR is given.
42 * This doesn't feel right, and IIRC GNU tar doesn't do that.
43 */
44
45#include <fnmatch.h>
46#include "libbb.h"
47#include "bb_archive.h"
48/* FIXME: Stop using this non-standard feature */
49#ifndef FNM_LEADING_DIR
50# define FNM_LEADING_DIR 0
51#endif
52
53
54//#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
55#define DBG(...) ((void)0)
56
57
58#define block_buf bb_common_bufsiz1
59
60
61#if !ENABLE_FEATURE_SEAMLESS_GZ && !ENABLE_FEATURE_SEAMLESS_BZ2
62/* Do not pass gzip flag to writeTarFile() */
63#define writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude, gzip) \
64    writeTarFile(tar_fd, verboseFlag, recurseFlags, include, exclude)
65#endif
66
67
68#if ENABLE_FEATURE_TAR_CREATE
69
70/*
71** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
72** the only functions that deal with the HardLinkInfo structure.
73** Even these functions use the xxxHardLinkInfo() functions.
74*/
75typedef struct HardLinkInfo {
76    struct HardLinkInfo *next; /* Next entry in list */
77    dev_t dev;                 /* Device number */
78    ino_t ino;                 /* Inode number */
79//  short linkCount;           /* (Hard) Link Count */
80    char name[1];              /* Start of filename (must be last) */
81} HardLinkInfo;
82
83/* Some info to be carried along when creating a new tarball */
84typedef struct TarBallInfo {
85    int tarFd;                      /* Open-for-write file descriptor
86                                     * for the tarball */
87    int verboseFlag;                /* Whether to print extra stuff or not */
88    const llist_t *excludeList;     /* List of files to not include */
89    HardLinkInfo *hlInfoHead;       /* Hard Link Tracking Information */
90    HardLinkInfo *hlInfo;           /* Hard Link Info for the current file */
91//TODO: save only st_dev + st_ino
92    struct stat tarFileStatBuf;     /* Stat info for the tarball, letting
93                                     * us know the inode and device that the
94                                     * tarball lives, so we can avoid trying
95                                     * to include the tarball into itself */
96} TarBallInfo;
97
98/* A nice enum with all the possible tar file content types */
99enum {
100    REGTYPE = '0',      /* regular file */
101    REGTYPE0 = '\0',    /* regular file (ancient bug compat) */
102    LNKTYPE = '1',      /* hard link */
103    SYMTYPE = '2',      /* symbolic link */
104    CHRTYPE = '3',      /* character special */
105    BLKTYPE = '4',      /* block special */
106    DIRTYPE = '5',      /* directory */
107    FIFOTYPE = '6',     /* FIFO special */
108    CONTTYPE = '7',     /* reserved */
109    GNULONGLINK = 'K',  /* GNU long (>100 chars) link name */
110    GNULONGNAME = 'L',  /* GNU long (>100 chars) file name */
111};
112
113/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
114static void addHardLinkInfo(HardLinkInfo **hlInfoHeadPtr,
115                    struct stat *statbuf,
116                    const char *fileName)
117{
118    /* Note: hlInfoHeadPtr can never be NULL! */
119    HardLinkInfo *hlInfo;
120
121    hlInfo = xmalloc(sizeof(HardLinkInfo) + strlen(fileName));
122    hlInfo->next = *hlInfoHeadPtr;
123    *hlInfoHeadPtr = hlInfo;
124    hlInfo->dev = statbuf->st_dev;
125    hlInfo->ino = statbuf->st_ino;
126//  hlInfo->linkCount = statbuf->st_nlink;
127    strcpy(hlInfo->name, fileName);
128}
129
130static void freeHardLinkInfo(HardLinkInfo **hlInfoHeadPtr)
131{
132    HardLinkInfo *hlInfo;
133    HardLinkInfo *hlInfoNext;
134
135    if (hlInfoHeadPtr) {
136        hlInfo = *hlInfoHeadPtr;
137        while (hlInfo) {
138            hlInfoNext = hlInfo->next;
139            free(hlInfo);
140            hlInfo = hlInfoNext;
141        }
142        *hlInfoHeadPtr = NULL;
143    }
144}
145
146/* Might be faster (and bigger) if the dev/ino were stored in numeric order ;) */
147static HardLinkInfo *findHardLinkInfo(HardLinkInfo *hlInfo, struct stat *statbuf)
148{
149    while (hlInfo) {
150        if (statbuf->st_ino == hlInfo->ino
151         && statbuf->st_dev == hlInfo->dev
152        ) {
153            DBG("found hardlink:'%s'", hlInfo->name);
154            break;
155        }
156        hlInfo = hlInfo->next;
157    }
158    return hlInfo;
159}
160
161/* Put an octal string into the specified buffer.
162 * The number is zero padded and possibly null terminated.
163 * Stores low-order bits only if whole value does not fit. */
164static void putOctal(char *cp, int len, off_t value)
165{
166    char tempBuffer[sizeof(off_t)*3 + 1];
167    char *tempString = tempBuffer;
168    int width;
169
170    width = sprintf(tempBuffer, "%0*"OFF_FMT"o", len, value);
171    tempString += (width - len);
172
173    /* If string has leading zeroes, we can drop one */
174    /* and field will have trailing '\0' */
175    /* (increases chances of compat with other tars) */
176    if (tempString[0] == '0')
177        tempString++;
178
179    /* Copy the string to the field */
180    memcpy(cp, tempString, len);
181}
182#define PUT_OCTAL(a, b) putOctal((a), sizeof(a), (b))
183
184static void chksum_and_xwrite(int fd, struct tar_header_t* hp)
185{
186    /* POSIX says that checksum is done on unsigned bytes
187     * (Sun and HP-UX gets it wrong... more details in
188     * GNU tar source) */
189    const unsigned char *cp;
190    int chksum, size;
191
192    strcpy(hp->magic, "ustar  ");
193
194    /* Calculate and store the checksum (i.e., the sum of all of the bytes of
195     * the header).  The checksum field must be filled with blanks for the
196     * calculation.  The checksum field is formatted differently from the
197     * other fields: it has 6 digits, a null, then a space -- rather than
198     * digits, followed by a null like the other fields... */
199    memset(hp->chksum, ' ', sizeof(hp->chksum));
200    cp = (const unsigned char *) hp;
201    chksum = 0;
202    size = sizeof(*hp);
203    do { chksum += *cp++; } while (--size);
204    putOctal(hp->chksum, sizeof(hp->chksum)-1, chksum);
205
206    /* Now write the header out to disk */
207    xwrite(fd, hp, sizeof(*hp));
208}
209
210#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
211static void writeLongname(int fd, int type, const char *name, int dir)
212{
213    static const struct {
214        char mode[8];             /* 100-107 */
215        char uid[8];              /* 108-115 */
216        char gid[8];              /* 116-123 */
217        char size[12];            /* 124-135 */
218        char mtime[12];           /* 136-147 */
219    } prefilled = {
220        "0000000",
221        "0000000",
222        "0000000",
223        "00000000000",
224        "00000000000",
225    };
226    struct tar_header_t header;
227    int size;
228
229    dir = !!dir; /* normalize: 0/1 */
230    size = strlen(name) + 1 + dir; /* GNU tar uses strlen+1 */
231    /* + dir: account for possible '/' */
232
233    memset(&header, 0, sizeof(header));
234    strcpy(header.name, "././@LongLink");
235    memcpy(header.mode, prefilled.mode, sizeof(prefilled));
236    PUT_OCTAL(header.size, size);
237    header.typeflag = type;
238    chksum_and_xwrite(fd, &header);
239
240    /* Write filename[/] and pad the block. */
241    /* dir=0: writes 'name<NUL>', pads */
242    /* dir=1: writes 'name', writes '/<NUL>', pads */
243    dir *= 2;
244    xwrite(fd, name, size - dir);
245    xwrite(fd, "/", dir);
246    size = (-size) & (TAR_BLOCK_SIZE-1);
247    memset(&header, 0, size);
248    xwrite(fd, &header, size);
249}
250#endif
251
252/* Write out a tar header for the specified file/directory/whatever */
253static int writeTarHeader(struct TarBallInfo *tbInfo,
254        const char *header_name, const char *fileName, struct stat *statbuf)
255{
256    struct tar_header_t header;
257
258    memset(&header, 0, sizeof(header));
259
260    strncpy(header.name, header_name, sizeof(header.name));
261
262    /* POSIX says to mask mode with 07777. */
263    PUT_OCTAL(header.mode, statbuf->st_mode & 07777);
264    PUT_OCTAL(header.uid, statbuf->st_uid);
265    PUT_OCTAL(header.gid, statbuf->st_gid);
266    memset(header.size, '0', sizeof(header.size)-1); /* Regular file size is handled later */
267    /* users report that files with negative st_mtime cause trouble, so: */
268    PUT_OCTAL(header.mtime, statbuf->st_mtime >= 0 ? statbuf->st_mtime : 0);
269
270    /* Enter the user and group names */
271    safe_strncpy(header.uname, get_cached_username(statbuf->st_uid), sizeof(header.uname));
272    safe_strncpy(header.gname, get_cached_groupname(statbuf->st_gid), sizeof(header.gname));
273
274    if (tbInfo->hlInfo) {
275        /* This is a hard link */
276        header.typeflag = LNKTYPE;
277        strncpy(header.linkname, tbInfo->hlInfo->name,
278                sizeof(header.linkname));
279#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
280        /* Write out long linkname if needed */
281        if (header.linkname[sizeof(header.linkname)-1])
282            writeLongname(tbInfo->tarFd, GNULONGLINK,
283                    tbInfo->hlInfo->name, 0);
284#endif
285    } else if (S_ISLNK(statbuf->st_mode)) {
286        char *lpath = xmalloc_readlink_or_warn(fileName);
287        if (!lpath)
288            return FALSE;
289        header.typeflag = SYMTYPE;
290        strncpy(header.linkname, lpath, sizeof(header.linkname));
291#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
292        /* Write out long linkname if needed */
293        if (header.linkname[sizeof(header.linkname)-1])
294            writeLongname(tbInfo->tarFd, GNULONGLINK, lpath, 0);
295#else
296        /* If it is larger than 100 bytes, bail out */
297        if (header.linkname[sizeof(header.linkname)-1]) {
298            free(lpath);
299            bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
300            return FALSE;
301        }
302#endif
303        free(lpath);
304    } else if (S_ISDIR(statbuf->st_mode)) {
305        header.typeflag = DIRTYPE;
306        /* Append '/' only if there is a space for it */
307        if (!header.name[sizeof(header.name)-1])
308            header.name[strlen(header.name)] = '/';
309    } else if (S_ISCHR(statbuf->st_mode)) {
310        header.typeflag = CHRTYPE;
311        PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
312        PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
313    } else if (S_ISBLK(statbuf->st_mode)) {
314        header.typeflag = BLKTYPE;
315        PUT_OCTAL(header.devmajor, major(statbuf->st_rdev));
316        PUT_OCTAL(header.devminor, minor(statbuf->st_rdev));
317    } else if (S_ISFIFO(statbuf->st_mode)) {
318        header.typeflag = FIFOTYPE;
319    } else if (S_ISREG(statbuf->st_mode)) {
320        /* header.size field is 12 bytes long */
321        /* Does octal-encoded size fit? */
322        uoff_t filesize = statbuf->st_size;
323        if (sizeof(filesize) <= 4
324         || filesize <= (uoff_t)0777777777777LL
325        ) {
326            PUT_OCTAL(header.size, filesize);
327        }
328        /* Does base256-encoded size fit?
329         * It always does unless off_t is wider than 64 bits.
330         */
331        else if (ENABLE_FEATURE_TAR_GNU_EXTENSIONS
332#if ULLONG_MAX > 0xffffffffffffffffLL /* 2^64-1 */
333         && (filesize <= 0x3fffffffffffffffffffffffLL)
334#endif
335        ) {
336            /* GNU tar uses "base-256 encoding" for very large numbers.
337             * Encoding is binary, with highest bit always set as a marker
338             * and sign in next-highest bit:
339             * 80 00 .. 00 - zero
340             * bf ff .. ff - largest positive number
341             * ff ff .. ff - minus 1
342             * c0 00 .. 00 - smallest negative number
343             */
344            char *p8 = header.size + sizeof(header.size);
345            do {
346                *--p8 = (uint8_t)filesize;
347                filesize >>= 8;
348            } while (p8 != header.size);
349            *p8 |= 0x80;
350        } else {
351            bb_error_msg_and_die("can't store file '%s' "
352                "of size %"OFF_FMT"u, aborting",
353                fileName, statbuf->st_size);
354        }
355        header.typeflag = REGTYPE;
356    } else {
357        bb_error_msg("%s: unknown file type", fileName);
358        return FALSE;
359    }
360
361#if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
362    /* Write out long name if needed */
363    /* (we, like GNU tar, output long linkname *before* long name) */
364    if (header.name[sizeof(header.name)-1])
365        writeLongname(tbInfo->tarFd, GNULONGNAME,
366                header_name, S_ISDIR(statbuf->st_mode));
367#endif
368
369    /* Now write the header out to disk */
370    chksum_and_xwrite(tbInfo->tarFd, &header);
371
372    /* Now do the verbose thing (or not) */
373    if (tbInfo->verboseFlag) {
374        FILE *vbFd = stdout;
375
376        /* If archive goes to stdout, verbose goes to stderr */
377        if (tbInfo->tarFd == STDOUT_FILENO)
378            vbFd = stderr;
379        /* GNU "tar cvvf" prints "extended" listing a-la "ls -l" */
380        /* We don't have such excesses here: for us "v" == "vv" */
381        /* '/' is probably a GNUism */
382        fprintf(vbFd, "%s%s\n", header_name,
383                S_ISDIR(statbuf->st_mode) ? "/" : "");
384    }
385
386    return TRUE;
387}
388
389#if ENABLE_FEATURE_TAR_FROM
390static int exclude_file(const llist_t *excluded_files, const char *file)
391{
392    while (excluded_files) {
393        if (excluded_files->data[0] == '/') {
394            if (fnmatch(excluded_files->data, file,
395                    FNM_PATHNAME | FNM_LEADING_DIR) == 0)
396                return 1;
397        } else {
398            const char *p;
399
400            for (p = file; p[0] != '\0'; p++) {
401                if ((p == file || p[-1] == '/')
402                 && p[0] != '/'
403                 && fnmatch(excluded_files->data, p,
404                        FNM_PATHNAME | FNM_LEADING_DIR) == 0
405                ) {
406                    return 1;
407                }
408            }
409        }
410        excluded_files = excluded_files->link;
411    }
412
413    return 0;
414}
415#else
416# define exclude_file(excluded_files, file) 0
417#endif
418
419static int FAST_FUNC writeFileToTarball(const char *fileName, struct stat *statbuf,
420            void *userData, int depth UNUSED_PARAM)
421{
422    struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
423    const char *header_name;
424    int inputFileFd = -1;
425
426    DBG("writeFileToTarball('%s')", fileName);
427
428    /* Strip leading '/' and such (must be before memorizing hardlink's name) */
429    header_name = strip_unsafe_prefix(fileName);
430
431    if (header_name[0] == '\0')
432        return TRUE;
433
434    /* It is against the rules to archive a socket */
435    if (S_ISSOCK(statbuf->st_mode)) {
436        bb_error_msg("%s: socket ignored", fileName);
437        return TRUE;
438    }
439
440    /*
441     * Check to see if we are dealing with a hard link.
442     * If so -
443     * Treat the first occurance of a given dev/inode as a file while
444     * treating any additional occurances as hard links.  This is done
445     * by adding the file information to the HardLinkInfo linked list.
446     */
447    tbInfo->hlInfo = NULL;
448    if (!S_ISDIR(statbuf->st_mode) && statbuf->st_nlink > 1) {
449        DBG("'%s': st_nlink > 1", header_name);
450        tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
451        if (tbInfo->hlInfo == NULL) {
452            DBG("'%s': addHardLinkInfo", header_name);
453            addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, header_name);
454        }
455    }
456
457    /* It is a bad idea to store the archive we are in the process of creating,
458     * so check the device and inode to be sure that this particular file isn't
459     * the new tarball */
460    if (tbInfo->tarFileStatBuf.st_dev == statbuf->st_dev
461     && tbInfo->tarFileStatBuf.st_ino == statbuf->st_ino
462    ) {
463        bb_error_msg("%s: file is the archive; skipping", fileName);
464        return TRUE;
465    }
466
467    if (exclude_file(tbInfo->excludeList, header_name))
468        return SKIP;
469
470#if !ENABLE_FEATURE_TAR_GNU_EXTENSIONS
471    if (strlen(header_name) >= NAME_SIZE) {
472        bb_error_msg("names longer than "NAME_SIZE_STR" chars not supported");
473        return TRUE;
474    }
475#endif
476
477    /* Is this a regular file? */
478    if (tbInfo->hlInfo == NULL && S_ISREG(statbuf->st_mode)) {
479        /* open the file we want to archive, and make sure all is well */
480        inputFileFd = open_or_warn(fileName, O_RDONLY);
481        if (inputFileFd < 0) {
482            return FALSE;
483        }
484    }
485
486    /* Add an entry to the tarball */
487    if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
488        return FALSE;
489    }
490
491    /* If it was a regular file, write out the body */
492    if (inputFileFd >= 0) {
493        size_t readSize;
494        /* Write the file to the archive. */
495        /* We record size into header first, */
496        /* and then write out file. If file shrinks in between, */
497        /* tar will be corrupted. So we don't allow for that. */
498        /* NB: GNU tar 1.16 warns and pads with zeroes */
499        /* or even seeks back and updates header */
500        bb_copyfd_exact_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
501        ////off_t readSize;
502        ////readSize = bb_copyfd_size(inputFileFd, tbInfo->tarFd, statbuf->st_size);
503        ////if (readSize != statbuf->st_size && readSize >= 0) {
504        ////    bb_error_msg_and_die("short read from %s, aborting", fileName);
505        ////}
506
507        /* Check that file did not grow in between? */
508        /* if (safe_read(inputFileFd, 1) == 1) warn but continue? */
509
510        close(inputFileFd);
511
512        /* Pad the file up to the tar block size */
513        /* (a few tricks here in the name of code size) */
514        readSize = (-(int)statbuf->st_size) & (TAR_BLOCK_SIZE-1);
515        memset(block_buf, 0, readSize);
516        xwrite(tbInfo->tarFd, block_buf, readSize);
517    }
518
519    return TRUE;
520}
521
522#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2
523# if !(ENABLE_FEATURE_SEAMLESS_GZ && ENABLE_FEATURE_SEAMLESS_BZ2)
524#  define vfork_compressor(tar_fd, gzip) vfork_compressor(tar_fd)
525# endif
526/* Don't inline: vfork scares gcc and pessimizes code */
527static void NOINLINE vfork_compressor(int tar_fd, int gzip)
528{
529    pid_t gzipPid;
530# if ENABLE_FEATURE_SEAMLESS_GZ && ENABLE_FEATURE_SEAMLESS_BZ2
531    const char *zip_exec = (gzip == 1) ? "gzip" : "bzip2";
532# elif ENABLE_FEATURE_SEAMLESS_GZ
533    const char *zip_exec = "gzip";
534# else /* only ENABLE_FEATURE_SEAMLESS_BZ2 */
535    const char *zip_exec = "bzip2";
536# endif
537    // On Linux, vfork never unpauses parent early, although standard
538    // allows for that. Do we want to waste bytes checking for it?
539# define WAIT_FOR_CHILD 0
540    volatile int vfork_exec_errno = 0;
541    struct fd_pair gzipDataPipe;
542# if WAIT_FOR_CHILD
543    struct fd_pair gzipStatusPipe;
544    xpiped_pair(gzipStatusPipe);
545# endif
546    xpiped_pair(gzipDataPipe);
547
548    signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
549
550# if defined(__GNUC__) && __GNUC__
551    /* Avoid vfork clobbering */
552    (void) &zip_exec;
553# endif
554
555    gzipPid = xvfork();
556
557    if (gzipPid == 0) {
558        /* child */
559        /* NB: close _first_, then move fds! */
560        close(gzipDataPipe.wr);
561# if WAIT_FOR_CHILD
562        close(gzipStatusPipe.rd);
563        /* gzipStatusPipe.wr will close only on exec -
564         * parent waits for this close to happen */
565        fcntl(gzipStatusPipe.wr, F_SETFD, FD_CLOEXEC);
566# endif
567        xmove_fd(gzipDataPipe.rd, 0);
568        xmove_fd(tar_fd, 1);
569        /* exec gzip/bzip2 program/applet */
570        BB_EXECLP(zip_exec, zip_exec, "-f", NULL);
571        vfork_exec_errno = errno;
572        _exit(EXIT_FAILURE);
573    }
574
575    /* parent */
576    xmove_fd(gzipDataPipe.wr, tar_fd);
577    close(gzipDataPipe.rd);
578# if WAIT_FOR_CHILD
579    close(gzipStatusPipe.wr);
580    while (1) {
581        char buf;
582        int n;
583
584        /* Wait until child execs (or fails to) */
585        n = full_read(gzipStatusPipe.rd, &buf, 1);
586        if (n < 0 /* && errno == EAGAIN */)
587            continue;   /* try it again */
588    }
589    close(gzipStatusPipe.rd);
590# endif
591    if (vfork_exec_errno) {
592        errno = vfork_exec_errno;
593        bb_perror_msg_and_die("can't execute '%s'", zip_exec);
594    }
595}
596#endif /* ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2 */
597
598
599/* gcc 4.2.1 inlines it, making code bigger */
600static NOINLINE int writeTarFile(int tar_fd, int verboseFlag,
601    int recurseFlags, const llist_t *include,
602    const llist_t *exclude, int gzip)
603{
604    int errorFlag = FALSE;
605    struct TarBallInfo tbInfo;
606
607    tbInfo.hlInfoHead = NULL;
608    tbInfo.tarFd = tar_fd;
609    tbInfo.verboseFlag = verboseFlag;
610
611    /* Store the stat info for the tarball's file, so
612     * can avoid including the tarball into itself....  */
613    xfstat(tbInfo.tarFd, &tbInfo.tarFileStatBuf, "can't stat tar file");
614
615#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2
616    if (gzip)
617        vfork_compressor(tbInfo.tarFd, gzip);
618#endif
619
620    tbInfo.excludeList = exclude;
621
622    /* Read the directory/files and iterate over them one at a time */
623    while (include) {
624        if (!recursive_action(include->data, recurseFlags,
625                writeFileToTarball, writeFileToTarball, &tbInfo, 0)
626        ) {
627            errorFlag = TRUE;
628        }
629        include = include->link;
630    }
631    /* Write two empty blocks to the end of the archive */
632    memset(block_buf, 0, 2*TAR_BLOCK_SIZE);
633    xwrite(tbInfo.tarFd, block_buf, 2*TAR_BLOCK_SIZE);
634
635    /* To be pedantically correct, we would check if the tarball
636     * is smaller than 20 tar blocks, and pad it if it was smaller,
637     * but that isn't necessary for GNU tar interoperability, and
638     * so is considered a waste of space */
639
640    /* Close so the child process (if any) will exit */
641    close(tbInfo.tarFd);
642
643    /* Hang up the tools, close up shop, head home */
644    if (ENABLE_FEATURE_CLEAN_UP)
645        freeHardLinkInfo(&tbInfo.hlInfoHead);
646
647    if (errorFlag)
648        bb_error_msg("error exit delayed from previous errors");
649
650#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2
651    if (gzip) {
652        int status;
653        if (safe_waitpid(-1, &status, 0) == -1)
654            bb_perror_msg("waitpid");
655        else if (!WIFEXITED(status) || WEXITSTATUS(status))
656            /* gzip was killed or has exited with nonzero! */
657            errorFlag = TRUE;
658    }
659#endif
660    return errorFlag;
661}
662#else
663int writeTarFile(int tar_fd, int verboseFlag,
664    int recurseFlags, const llist_t *include,
665    const llist_t *exclude, int gzip);
666#endif /* FEATURE_TAR_CREATE */
667
668#if ENABLE_FEATURE_TAR_FROM
669static llist_t *append_file_list_to_list(llist_t *list)
670{
671    FILE *src_stream;
672    char *line;
673    llist_t *newlist = NULL;
674
675    while (list) {
676        src_stream = xfopen_stdin(llist_pop(&list));
677        while ((line = xmalloc_fgetline(src_stream)) != NULL) {
678            /* kill trailing '/' unless the string is just "/" */
679            char *cp = last_char_is(line, '/');
680            if (cp > line)
681                *cp = '\0';
682            llist_add_to(&newlist, line);
683        }
684        fclose(src_stream);
685    }
686    return newlist;
687}
688#else
689# define append_file_list_to_list(x) 0
690#endif
691
692//usage:#define tar_trivial_usage
693//usage:    "-[" IF_FEATURE_TAR_CREATE("c") "xt"
694//usage:    IF_FEATURE_SEAMLESS_Z("Z")
695//usage:    IF_FEATURE_SEAMLESS_GZ("z")
696//usage:    IF_FEATURE_SEAMLESS_XZ("J")
697//usage:    IF_FEATURE_SEAMLESS_BZ2("j")
698//usage:    IF_FEATURE_SEAMLESS_LZMA("a")
699//usage:    IF_FEATURE_TAR_CREATE("h")
700//usage:    IF_FEATURE_TAR_NOPRESERVE_TIME("m")
701//usage:    "vO] "
702//usage:    IF_FEATURE_TAR_FROM("[-X FILE] [-T FILE] ")
703//usage:    "[-f TARFILE] [-C DIR] [FILE]..."
704//usage:#define tar_full_usage "\n\n"
705//usage:    IF_FEATURE_TAR_CREATE("Create, extract, ")
706//usage:    IF_NOT_FEATURE_TAR_CREATE("Extract ")
707//usage:    "or list files from a tar file\n"
708//usage:     "\nOperation:"
709//usage:    IF_FEATURE_TAR_CREATE(
710//usage:     "\n    c   Create"
711//usage:    )
712//usage:     "\n    x   Extract"
713//usage:     "\n    t   List"
714//usage:     "\n    f   Name of TARFILE ('-' for stdin/out)"
715//usage:     "\n    C   Change to DIR before operation"
716//usage:     "\n    v   Verbose"
717//usage:    IF_FEATURE_SEAMLESS_Z(
718//usage:     "\n    Z   (De)compress using compress"
719//usage:    )
720//usage:    IF_FEATURE_SEAMLESS_GZ(
721//usage:     "\n    z   (De)compress using gzip"
722//usage:    )
723//usage:    IF_FEATURE_SEAMLESS_XZ(
724//usage:     "\n    J   (De)compress using xz"
725//usage:    )
726//usage:    IF_FEATURE_SEAMLESS_BZ2(
727//usage:     "\n    j   (De)compress using bzip2"
728//usage:    )
729//usage:    IF_FEATURE_SEAMLESS_LZMA(
730//usage:     "\n    a   (De)compress using lzma"
731//usage:    )
732//usage:     "\n    O   Extract to stdout"
733//usage:    IF_FEATURE_TAR_CREATE(
734//usage:     "\n    h   Follow symlinks"
735//usage:    )
736//usage:    IF_FEATURE_TAR_NOPRESERVE_TIME(
737//usage:     "\n    m   Don't restore mtime"
738//usage:    )
739//usage:    IF_FEATURE_TAR_FROM(
740//usage:    IF_FEATURE_TAR_LONG_OPTIONS(
741//usage:     "\n    exclude File to exclude"
742//usage:    )
743//usage:     "\n    X   File with names to exclude"
744//usage:     "\n    T   File with names to include"
745//usage:    )
746//usage:
747//usage:#define tar_example_usage
748//usage:       "$ zcat /tmp/tarball.tar.gz | tar -xf -\n"
749//usage:       "$ tar -cf /tmp/tarball.tar /usr/local\n"
750
751// Supported but aren't in --help:
752//  o   no-same-owner
753//  p   same-permissions
754//  k   keep-old
755//  no-recursion
756//  numeric-owner
757//  no-same-permissions
758//  overwrite
759//IF_FEATURE_TAR_TO_COMMAND(
760//  to-command
761//)
762
763enum {
764    OPTBIT_KEEP_OLD = 8,
765    IF_FEATURE_TAR_CREATE(   OPTBIT_CREATE      ,)
766    IF_FEATURE_TAR_CREATE(   OPTBIT_DEREFERENCE ,)
767    IF_FEATURE_SEAMLESS_BZ2( OPTBIT_BZIP2       ,)
768    IF_FEATURE_SEAMLESS_LZMA(OPTBIT_LZMA        ,)
769    IF_FEATURE_TAR_FROM(     OPTBIT_INCLUDE_FROM,)
770    IF_FEATURE_TAR_FROM(     OPTBIT_EXCLUDE_FROM,)
771    IF_FEATURE_SEAMLESS_GZ(  OPTBIT_GZIP        ,)
772    IF_FEATURE_SEAMLESS_XZ(  OPTBIT_XZ          ,) // 16th bit
773    IF_FEATURE_SEAMLESS_Z(   OPTBIT_COMPRESS    ,)
774    IF_FEATURE_TAR_NOPRESERVE_TIME(OPTBIT_NOPRESERVE_TIME,)
775#if ENABLE_FEATURE_TAR_LONG_OPTIONS
776    OPTBIT_NORECURSION,
777    IF_FEATURE_TAR_TO_COMMAND(OPTBIT_2COMMAND   ,)
778    OPTBIT_NUMERIC_OWNER,
779    OPTBIT_NOPRESERVE_PERM,
780    OPTBIT_OVERWRITE,
781#endif
782    OPT_TEST         = 1 << 0, // t
783    OPT_EXTRACT      = 1 << 1, // x
784    OPT_BASEDIR      = 1 << 2, // C
785    OPT_TARNAME      = 1 << 3, // f
786    OPT_2STDOUT      = 1 << 4, // O
787    OPT_NOPRESERVE_OWNER = 1 << 5, // o == no-same-owner
788    OPT_P            = 1 << 6, // p
789    OPT_VERBOSE      = 1 << 7, // v
790    OPT_KEEP_OLD     = 1 << 8, // k
791    OPT_CREATE       = IF_FEATURE_TAR_CREATE(   (1 << OPTBIT_CREATE      )) + 0, // c
792    OPT_DEREFERENCE  = IF_FEATURE_TAR_CREATE(   (1 << OPTBIT_DEREFERENCE )) + 0, // h
793    OPT_BZIP2        = IF_FEATURE_SEAMLESS_BZ2( (1 << OPTBIT_BZIP2       )) + 0, // j
794    OPT_LZMA         = IF_FEATURE_SEAMLESS_LZMA((1 << OPTBIT_LZMA        )) + 0, // a
795    OPT_INCLUDE_FROM = IF_FEATURE_TAR_FROM(     (1 << OPTBIT_INCLUDE_FROM)) + 0, // T
796    OPT_EXCLUDE_FROM = IF_FEATURE_TAR_FROM(     (1 << OPTBIT_EXCLUDE_FROM)) + 0, // X
797    OPT_GZIP         = IF_FEATURE_SEAMLESS_GZ(  (1 << OPTBIT_GZIP        )) + 0, // z
798    OPT_XZ           = IF_FEATURE_SEAMLESS_XZ(  (1 << OPTBIT_XZ          )) + 0, // J
799    OPT_COMPRESS     = IF_FEATURE_SEAMLESS_Z(   (1 << OPTBIT_COMPRESS    )) + 0, // Z
800    OPT_NOPRESERVE_TIME = IF_FEATURE_TAR_NOPRESERVE_TIME((1 << OPTBIT_NOPRESERVE_TIME)) + 0, // m
801    OPT_NORECURSION     = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NORECURSION    )) + 0, // no-recursion
802    OPT_2COMMAND        = IF_FEATURE_TAR_TO_COMMAND(  (1 << OPTBIT_2COMMAND       )) + 0, // to-command
803    OPT_NUMERIC_OWNER   = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NUMERIC_OWNER  )) + 0, // numeric-owner
804    OPT_NOPRESERVE_PERM = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_NOPRESERVE_PERM)) + 0, // no-same-permissions
805    OPT_OVERWRITE       = IF_FEATURE_TAR_LONG_OPTIONS((1 << OPTBIT_OVERWRITE      )) + 0, // overwrite
806
807    OPT_ANY_COMPRESS = (OPT_BZIP2 | OPT_LZMA | OPT_GZIP | OPT_XZ | OPT_COMPRESS),
808};
809#if ENABLE_FEATURE_TAR_LONG_OPTIONS
810static const char tar_longopts[] ALIGN1 =
811    "list\0"                No_argument       "t"
812    "extract\0"             No_argument       "x"
813    "directory\0"           Required_argument "C"
814    "file\0"                Required_argument "f"
815    "to-stdout\0"           No_argument       "O"
816    /* do not restore owner */
817    /* Note: GNU tar handles 'o' as no-same-owner only on extract,
818     * on create, 'o' is --old-archive. We do not support --old-archive. */
819    "no-same-owner\0"       No_argument       "o"
820    "same-permissions\0"    No_argument       "p"
821    "verbose\0"             No_argument       "v"
822    "keep-old\0"            No_argument       "k"
823# if ENABLE_FEATURE_TAR_CREATE
824    "create\0"              No_argument       "c"
825    "dereference\0"         No_argument       "h"
826# endif
827# if ENABLE_FEATURE_SEAMLESS_BZ2
828    "bzip2\0"               No_argument       "j"
829# endif
830# if ENABLE_FEATURE_SEAMLESS_LZMA
831    "lzma\0"                No_argument       "a"
832# endif
833# if ENABLE_FEATURE_TAR_FROM
834    "files-from\0"          Required_argument "T"
835    "exclude-from\0"        Required_argument "X"
836# endif
837# if ENABLE_FEATURE_SEAMLESS_GZ
838    "gzip\0"                No_argument       "z"
839# endif
840# if ENABLE_FEATURE_SEAMLESS_XZ
841    "xz\0"                  No_argument       "J"
842# endif
843# if ENABLE_FEATURE_SEAMLESS_Z
844    "compress\0"            No_argument       "Z"
845# endif
846# if ENABLE_FEATURE_TAR_NOPRESERVE_TIME
847    "touch\0"               No_argument       "m"
848# endif
849    "no-recursion\0"    No_argument       "\xfa"
850# if ENABLE_FEATURE_TAR_TO_COMMAND
851    "to-command\0"      Required_argument "\xfb"
852# endif
853    /* use numeric uid/gid from tar header, not textual */
854    "numeric-owner\0"       No_argument       "\xfc"
855    /* do not restore mode */
856    "no-same-permissions\0" No_argument       "\xfd"
857    /* on unpack, open with O_TRUNC and !O_EXCL */
858    "overwrite\0"           No_argument       "\xfe"
859    /* --exclude takes next bit position in option mask, */
860    /* therefore we have to put it _after_ --no-same-permissions */
861# if ENABLE_FEATURE_TAR_FROM
862    "exclude\0"             Required_argument "\xff"
863# endif
864    ;
865#endif
866
867int tar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
868int tar_main(int argc UNUSED_PARAM, char **argv)
869{
870    archive_handle_t *tar_handle;
871    char *base_dir = NULL;
872    const char *tar_filename = "-";
873    unsigned opt;
874    int verboseFlag = 0;
875#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
876    llist_t *excludes = NULL;
877#endif
878
879    /* Initialise default values */
880    tar_handle = init_handle();
881    tar_handle->ah_flags = ARCHIVE_CREATE_LEADING_DIRS
882                         | ARCHIVE_RESTORE_DATE
883                         | ARCHIVE_UNLINK_OLD;
884
885    /* Apparently only root's tar preserves perms (see bug 3844) */
886    if (getuid() != 0)
887        tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
888
889    /* Prepend '-' to the first argument if required */
890    opt_complementary = "--:" // first arg is options
891        "tt:vv:" // count -t,-v
892        IF_FEATURE_TAR_FROM("X::T::") // cumulative lists
893#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
894        "\xff::" // cumulative lists for --exclude
895#endif
896        IF_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
897        IF_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
898        IF_NOT_FEATURE_TAR_CREATE("t--x:x--t"); // mutually exclusive
899#if ENABLE_FEATURE_TAR_LONG_OPTIONS
900    applet_long_options = tar_longopts;
901#endif
902#if ENABLE_DESKTOP
903    if (argv[1] && argv[1][0] != '-') {
904        /* Compat:
905         * 1st argument without dash handles options with parameters
906         * differently from dashed one: it takes *next argv[i]*
907         * as paramenter even if there are more chars in 1st argument:
908         *  "tar fx TARFILE" - "x" is not taken as f's param
909         *  but is interpreted as -x option
910         *  "tar -xf TARFILE" - dashed equivalent of the above
911         *  "tar -fx ..." - "x" is taken as f's param
912         * getopt32 wouldn't handle 1st command correctly.
913         * Unfortunately, people do use such commands.
914         * We massage argv[1] to work around it by moving 'f'
915         * to the end of the string.
916         * More contrived "tar fCx TARFILE DIR" still fails,
917         * but such commands are much less likely to be used.
918         */
919        char *f = strchr(argv[1], 'f');
920        if (f) {
921            while (f[1] != '\0') {
922                *f = f[1];
923                f++;
924            }
925            *f = 'f';
926        }
927    }
928#endif
929    opt = getopt32(argv,
930        "txC:f:Oopvk"
931        IF_FEATURE_TAR_CREATE(   "ch"  )
932        IF_FEATURE_SEAMLESS_BZ2( "j"   )
933        IF_FEATURE_SEAMLESS_LZMA("a"   )
934        IF_FEATURE_TAR_FROM(     "T:X:")
935        IF_FEATURE_SEAMLESS_GZ(  "z"   )
936        IF_FEATURE_SEAMLESS_XZ(  "J"   )
937        IF_FEATURE_SEAMLESS_Z(   "Z"   )
938        IF_FEATURE_TAR_NOPRESERVE_TIME("m")
939        , &base_dir // -C dir
940        , &tar_filename // -f filename
941        IF_FEATURE_TAR_FROM(, &(tar_handle->accept)) // T
942        IF_FEATURE_TAR_FROM(, &(tar_handle->reject)) // X
943        IF_FEATURE_TAR_TO_COMMAND(, &(tar_handle->tar__to_command)) // --to-command
944#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
945        , &excludes // --exclude
946#endif
947        , &verboseFlag // combined count for -t and -v
948        , &verboseFlag // combined count for -t and -v
949        );
950    //bb_error_msg("opt:%08x", opt);
951    argv += optind;
952
953    if (verboseFlag) tar_handle->action_header = header_verbose_list;
954    if (verboseFlag == 1) tar_handle->action_header = header_list;
955
956    if (opt & OPT_EXTRACT)
957        tar_handle->action_data = data_extract_all;
958
959    if (opt & OPT_2STDOUT)
960        tar_handle->action_data = data_extract_to_stdout;
961
962    if (opt & OPT_2COMMAND) {
963        putenv((char*)"TAR_FILETYPE=f");
964        signal(SIGPIPE, SIG_IGN);
965        tar_handle->action_data = data_extract_to_command;
966        IF_FEATURE_TAR_TO_COMMAND(tar_handle->tar__to_command_shell = xstrdup(get_shell_name());)
967    }
968
969    if (opt & OPT_KEEP_OLD)
970        tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
971
972    if (opt & OPT_NUMERIC_OWNER)
973        tar_handle->ah_flags |= ARCHIVE_NUMERIC_OWNER;
974
975    if (opt & OPT_NOPRESERVE_OWNER)
976        tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_OWNER;
977
978    if (opt & OPT_NOPRESERVE_PERM)
979        tar_handle->ah_flags |= ARCHIVE_DONT_RESTORE_PERM;
980
981    if (opt & OPT_OVERWRITE) {
982        tar_handle->ah_flags &= ~ARCHIVE_UNLINK_OLD;
983        tar_handle->ah_flags |= ARCHIVE_O_TRUNC;
984    }
985
986    if (opt & OPT_NOPRESERVE_TIME)
987        tar_handle->ah_flags &= ~ARCHIVE_RESTORE_DATE;
988
989#if ENABLE_FEATURE_TAR_FROM
990    tar_handle->reject = append_file_list_to_list(tar_handle->reject);
991# if ENABLE_FEATURE_TAR_LONG_OPTIONS
992    /* Append excludes to reject */
993    while (excludes) {
994        llist_t *next = excludes->link;
995        excludes->link = tar_handle->reject;
996        tar_handle->reject = excludes;
997        excludes = next;
998    }
999# endif
1000    tar_handle->accept = append_file_list_to_list(tar_handle->accept);
1001#endif
1002
1003    /* Setup an array of filenames to work with */
1004    /* TODO: This is the same as in ar, make a separate function? */
1005    while (*argv) {
1006        /* kill trailing '/' unless the string is just "/" */
1007        char *cp = last_char_is(*argv, '/');
1008        if (cp > *argv)
1009            *cp = '\0';
1010        llist_add_to_end(&tar_handle->accept, *argv);
1011        argv++;
1012    }
1013
1014    if (tar_handle->accept || tar_handle->reject)
1015        tar_handle->filter = filter_accept_reject_list;
1016
1017    /* Open the tar file */
1018    {
1019        int tar_fd = STDIN_FILENO;
1020        int flags = O_RDONLY;
1021
1022        if (opt & OPT_CREATE) {
1023            /* Make sure there is at least one file to tar up */
1024            if (tar_handle->accept == NULL)
1025                bb_error_msg_and_die("empty archive");
1026
1027            tar_fd = STDOUT_FILENO;
1028            /* Mimicking GNU tar 1.15.1: */
1029            flags = O_WRONLY | O_CREAT | O_TRUNC;
1030        }
1031
1032        if (LONE_DASH(tar_filename)) {
1033            tar_handle->src_fd = tar_fd;
1034            tar_handle->seek = seek_by_read;
1035        } else {
1036            if (ENABLE_FEATURE_TAR_AUTODETECT
1037             && flags == O_RDONLY
1038             && !(opt & OPT_ANY_COMPRESS)
1039            ) {
1040                tar_handle->src_fd = open_zipped(tar_filename);
1041                if (tar_handle->src_fd < 0)
1042                    bb_perror_msg_and_die("can't open '%s'", tar_filename);
1043            } else {
1044                tar_handle->src_fd = xopen(tar_filename, flags);
1045            }
1046        }
1047    }
1048
1049    if (base_dir)
1050        xchdir(base_dir);
1051
1052    //if (SEAMLESS_COMPRESSION || OPT_COMPRESS)
1053    //  /* We need to know whether child (gzip/bzip/etc) exits abnormally */
1054    //  signal(SIGCHLD, check_errors_in_children);
1055
1056    /* Create an archive */
1057    if (opt & OPT_CREATE) {
1058#if ENABLE_FEATURE_SEAMLESS_GZ || ENABLE_FEATURE_SEAMLESS_BZ2
1059        int zipMode = 0;
1060        if (ENABLE_FEATURE_SEAMLESS_GZ && (opt & OPT_GZIP))
1061            zipMode = 1;
1062        if (ENABLE_FEATURE_SEAMLESS_BZ2 && (opt & OPT_BZIP2))
1063            zipMode = 2;
1064#endif
1065        /* NB: writeTarFile() closes tar_handle->src_fd */
1066        return writeTarFile(tar_handle->src_fd, verboseFlag,
1067                (opt & OPT_DEREFERENCE ? ACTION_FOLLOWLINKS : 0)
1068                | (opt & OPT_NORECURSION ? 0 : ACTION_RECURSE),
1069                tar_handle->accept,
1070                tar_handle->reject, zipMode);
1071    }
1072
1073    if (opt & OPT_ANY_COMPRESS) {
1074        USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd);)
1075        USE_FOR_NOMMU(const char *xformer_prog;)
1076
1077        if (opt & OPT_COMPRESS)
1078            USE_FOR_MMU(xformer = unpack_Z_stream;)
1079            USE_FOR_NOMMU(xformer_prog = "uncompress";)
1080        if (opt & OPT_GZIP)
1081            USE_FOR_MMU(xformer = unpack_gz_stream;)
1082            USE_FOR_NOMMU(xformer_prog = "gunzip";)
1083        if (opt & OPT_BZIP2)
1084            USE_FOR_MMU(xformer = unpack_bz2_stream;)
1085            USE_FOR_NOMMU(xformer_prog = "bunzip2";)
1086        if (opt & OPT_LZMA)
1087            USE_FOR_MMU(xformer = unpack_lzma_stream;)
1088            USE_FOR_NOMMU(xformer_prog = "unlzma";)
1089        if (opt & OPT_XZ)
1090            USE_FOR_MMU(xformer = unpack_xz_stream;)
1091            USE_FOR_NOMMU(xformer_prog = "unxz";)
1092
1093        open_transformer_with_sig(tar_handle->src_fd, xformer, xformer_prog);
1094        /* Can't lseek over pipes */
1095        tar_handle->seek = seek_by_read;
1096        /*tar_handle->offset = 0; - already is */
1097    }
1098
1099    while (get_header_tar(tar_handle) == EXIT_SUCCESS)
1100        continue;
1101
1102    /* Check that every file that should have been extracted was */
1103    while (tar_handle->accept) {
1104        if (!find_list_entry(tar_handle->reject, tar_handle->accept->data)
1105         && !find_list_entry(tar_handle->passed, tar_handle->accept->data)
1106        ) {
1107            bb_error_msg_and_die("%s: not found in archive",
1108                tar_handle->accept->data);
1109        }
1110        tar_handle->accept = tar_handle->accept->link;
1111    }
1112    if (ENABLE_FEATURE_CLEAN_UP /* && tar_handle->src_fd != STDIN_FILENO */)
1113        close(tar_handle->src_fd);
1114
1115    if (SEAMLESS_COMPRESSION || OPT_COMPRESS) {
1116        check_errors_in_children(0);
1117        return bb_got_signal;
1118    }
1119    return EXIT_SUCCESS;
1120}
Note: See TracBrowser for help on using the repository browser.