|
@@ -0,0 +1,747 @@
|
|
|
+/* Extract files from a tar archive.
|
|
|
+ Copyright (C) 1988 Free Software Foundation
|
|
|
+
|
|
|
+This file is part of GNU Tar.
|
|
|
+
|
|
|
+GNU Tar is free software; you can redistribute it and/or modify
|
|
|
+it under the terms of the GNU General Public License as published by
|
|
|
+the Free Software Foundation; either version 2, or (at your option)
|
|
|
+any later version.
|
|
|
+
|
|
|
+GNU Tar is distributed in the hope that it will be useful,
|
|
|
+but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
+GNU General Public License for more details.
|
|
|
+
|
|
|
+You should have received a copy of the GNU General Public License
|
|
|
+along with GNU Tar; see the file COPYING. If not, write to
|
|
|
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Extract files from a tar archive.
|
|
|
+ *
|
|
|
+ * Written 19 Nov 1985 by John Gilmore, ihnp4!hoptoad!gnu.
|
|
|
+ */
|
|
|
+
|
|
|
+#include <stdio.h>
|
|
|
+#include <errno.h>
|
|
|
+#ifndef STDC_HEADERS
|
|
|
+extern int errno;
|
|
|
+#endif
|
|
|
+#include <sys/types.h>
|
|
|
+#include <time.h>
|
|
|
+time_t time();
|
|
|
+
|
|
|
+#ifdef BSD42
|
|
|
+#include <sys/file.h>
|
|
|
+#else
|
|
|
+#ifndef V7
|
|
|
+#include <fcntl.h>
|
|
|
+#endif
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef NO_OPEN3
|
|
|
+/* We need the #define's even though we don't use them. */
|
|
|
+#include "open3.h"
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef EMUL_OPEN3
|
|
|
+/* Simulated 3-argument open for systems that don't have it */
|
|
|
+#include "open3.h"
|
|
|
+#endif
|
|
|
+
|
|
|
+#include "tar.h"
|
|
|
+#include "port.h"
|
|
|
+
|
|
|
+#if defined(_POSIX_VERSION)
|
|
|
+#include <utime.h>
|
|
|
+#endif
|
|
|
+
|
|
|
+extern FILE *msg_file;
|
|
|
+
|
|
|
+extern union record *head; /* Points to current tape header */
|
|
|
+extern struct stat hstat; /* Stat struct corresponding */
|
|
|
+extern int head_standard; /* Tape header is in ANSI format */
|
|
|
+
|
|
|
+extern char *save_name;
|
|
|
+extern long save_totsize;
|
|
|
+extern long save_sizeleft;
|
|
|
+
|
|
|
+int confirm();
|
|
|
+void decode_header();
|
|
|
+void extract_mangle();
|
|
|
+void extract_sparse_file();
|
|
|
+long from_oct();
|
|
|
+void gnu_restore();
|
|
|
+extern void print_header();
|
|
|
+extern void skip_file();
|
|
|
+extern void skip_extended_headers();
|
|
|
+extern void pr_mkdir();
|
|
|
+void saverec();
|
|
|
+
|
|
|
+int make_dirs(); /* Makes required directories */
|
|
|
+
|
|
|
+static time_t now = 0; /* Current time */
|
|
|
+static we_are_root = 0; /* True if our effective uid == 0 */
|
|
|
+static int notumask = ~0; /* Masks out bits user doesn't want */
|
|
|
+
|
|
|
+/*
|
|
|
+ * "Scratch" space to store the information about a sparse file before
|
|
|
+ * writing the info into the header or extended header
|
|
|
+ */
|
|
|
+/*struct sp_array *sparsearray;*/
|
|
|
+
|
|
|
+/* number of elts storable in the sparsearray */
|
|
|
+/*int sp_array_size = 10;*/
|
|
|
+
|
|
|
+/*
|
|
|
+ * Set up to extract files.
|
|
|
+ */
|
|
|
+void
|
|
|
+extr_init()
|
|
|
+{
|
|
|
+ int ourmask;
|
|
|
+
|
|
|
+ now = time((time_t *)0);
|
|
|
+ if (geteuid() == 0)
|
|
|
+ we_are_root = 1;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We need to know our umask. But if f_use_protection is set,
|
|
|
+ * leave our kernel umask at 0, and our "notumask" at ~0.
|
|
|
+ */
|
|
|
+ ourmask = umask(0); /* Read it */
|
|
|
+ if (!f_use_protection) {
|
|
|
+ (void) umask (ourmask); /* Set it back how it was */
|
|
|
+ notumask = ~ourmask; /* Make umask override permissions */
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/*
|
|
|
+ * Extract a file from the archive.
|
|
|
+ */
|
|
|
+void
|
|
|
+extract_archive()
|
|
|
+{
|
|
|
+ register char *data;
|
|
|
+ int fd, check, namelen, written, openflag;
|
|
|
+ long size;
|
|
|
+ time_t acc_upd_times[2];
|
|
|
+ register int skipcrud;
|
|
|
+ register int i;
|
|
|
+/* int sparse_ind = 0;*/
|
|
|
+ union record *exhdr;
|
|
|
+/* int end_nulls; */
|
|
|
+
|
|
|
+ saverec(&head); /* Make sure it sticks around */
|
|
|
+ userec(head); /* And go past it in the archive */
|
|
|
+ decode_header(head, &hstat, &head_standard, 1); /* Snarf fields */
|
|
|
+
|
|
|
+ if(f_confirm && !confirm("extract",head->header.name)) {
|
|
|
+ if (head->header.isextended)
|
|
|
+ skip_extended_headers();
|
|
|
+ skip_file((long)hstat.st_size);
|
|
|
+ saverec((union record **)0);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Print the record from 'head' and 'hstat' */
|
|
|
+ if (f_verbose)
|
|
|
+ print_header();
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Check for fully specified pathnames and other atrocities.
|
|
|
+ *
|
|
|
+ * Note, we can't just make a pointer to the new file name,
|
|
|
+ * since saverec() might move the header and adjust "head".
|
|
|
+ * We have to start from "head" every time we want to touch
|
|
|
+ * the header record.
|
|
|
+ */
|
|
|
+ skipcrud = 0;
|
|
|
+ while (!f_absolute_paths && '/' == head->header.name[skipcrud]) {
|
|
|
+ static int warned_once = 0;
|
|
|
+
|
|
|
+ skipcrud++; /* Force relative path */
|
|
|
+ if (!warned_once++) {
|
|
|
+ msg("Removing leading / from absolute path names in the archive.");
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ switch (head->header.linkflag) {
|
|
|
+
|
|
|
+ default:
|
|
|
+ msg("Unknown file type '%c' for %s, extracted as normal file",
|
|
|
+ head->header.linkflag, skipcrud+head->header.name);
|
|
|
+ /* FALL THRU */
|
|
|
+
|
|
|
+ /*
|
|
|
+ * JK - What we want to do if the file is sparse is loop through
|
|
|
+ * the array of sparse structures in the header and read in
|
|
|
+ * and translate the character strings representing 1) the offset
|
|
|
+ * at which to write and 2) how many bytes to write into numbers,
|
|
|
+ * which we store into the scratch array, "sparsearray". This
|
|
|
+ * array makes our life easier the same way it did in creating
|
|
|
+ * the tar file that had to deal with a sparse file.
|
|
|
+ *
|
|
|
+ * After we read in the first five (at most) sparse structures,
|
|
|
+ * we check to see if the file has an extended header, i.e.,
|
|
|
+ * if more sparse structures are needed to describe the contents
|
|
|
+ * of the new file. If so, we read in the extended headers
|
|
|
+ * and continue to store their contents into the sparsearray.
|
|
|
+ */
|
|
|
+ case LF_SPARSE:
|
|
|
+ sp_array_size = 10;
|
|
|
+ sparsearray = (struct sp_array *) malloc(sp_array_size * sizeof(struct sp_array));
|
|
|
+ for (i = 0; i < SPARSE_IN_HDR; i++) {
|
|
|
+ sparsearray[i].offset =
|
|
|
+ from_oct(1+12, head->header.sp[i].offset);
|
|
|
+ sparsearray[i].numbytes =
|
|
|
+ from_oct(1+12, head->header.sp[i].numbytes);
|
|
|
+ if (!sparsearray[i].numbytes)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+/* end_nulls = from_oct(1+12, head->header.ending_blanks);*/
|
|
|
+
|
|
|
+ if (head->header.isextended) {
|
|
|
+ /* read in the list of extended headers
|
|
|
+ and translate them into the sparsearray
|
|
|
+ as before */
|
|
|
+
|
|
|
+ /* static */ int ind = SPARSE_IN_HDR;
|
|
|
+
|
|
|
+ for (;;) {
|
|
|
+
|
|
|
+ exhdr = findrec();
|
|
|
+ for (i = 0; i < SPARSE_EXT_HDR; i++) {
|
|
|
+
|
|
|
+ if (i+ind > sp_array_size-1) {
|
|
|
+ /*
|
|
|
+ * realloc the scratch area
|
|
|
+ * since we've run out of room --
|
|
|
+ */
|
|
|
+ sparsearray = (struct sp_array *)
|
|
|
+ realloc(sparsearray,
|
|
|
+ 2 * sp_array_size * (sizeof(struct sp_array)));
|
|
|
+ sp_array_size *= 2;
|
|
|
+ }
|
|
|
+ if (!exhdr->ext_hdr.sp[i].numbytes)
|
|
|
+ break;
|
|
|
+ sparsearray[i+ind].offset =
|
|
|
+ from_oct(1+12, exhdr->ext_hdr.sp[i].offset);
|
|
|
+ sparsearray[i+ind].numbytes =
|
|
|
+ from_oct(1+12, exhdr->ext_hdr.sp[i].numbytes);
|
|
|
+ }
|
|
|
+ if (!exhdr->ext_hdr.isextended)
|
|
|
+ break;
|
|
|
+ else {
|
|
|
+ ind += SPARSE_EXT_HDR;
|
|
|
+ userec(exhdr);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ userec(exhdr);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* FALL THRU */
|
|
|
+ case LF_OLDNORMAL:
|
|
|
+ case LF_NORMAL:
|
|
|
+ case LF_CONTIG:
|
|
|
+ /*
|
|
|
+ * Appears to be a file.
|
|
|
+ * See if it's really a directory.
|
|
|
+ */
|
|
|
+ namelen = strlen(skipcrud+head->header.name)-1;
|
|
|
+ if (head->header.name[skipcrud+namelen] == '/')
|
|
|
+ goto really_dir;
|
|
|
+
|
|
|
+ /* FIXME, deal with protection issues */
|
|
|
+ again_file:
|
|
|
+ openflag = (f_keep?
|
|
|
+ O_BINARY|O_NDELAY|O_WRONLY|O_CREAT|O_EXCL:
|
|
|
+ O_BINARY|O_NDELAY|O_WRONLY|O_CREAT|O_TRUNC)
|
|
|
+ | ((head->header.linkflag == LF_SPARSE) ? 0 : O_APPEND);
|
|
|
+ /*
|
|
|
+ * JK - The last | is a kludge to solve the problem
|
|
|
+ * the O_APPEND flag causes with files we are
|
|
|
+ * trying to make sparse: when a file is opened
|
|
|
+ * with O_APPEND, it writes to the last place
|
|
|
+ * that something was written, thereby ignoring
|
|
|
+ * any lseeks that we have done. We add this
|
|
|
+ * extra condition to make it able to lseek when
|
|
|
+ * a file is sparse, i.e., we don't open the new
|
|
|
+ * file with this flag. (Grump -- this bug caused
|
|
|
+ * me to waste a good deal of time, I might add)
|
|
|
+ */
|
|
|
+
|
|
|
+ if(f_exstdout) {
|
|
|
+ fd = 1;
|
|
|
+ goto extract_file;
|
|
|
+ }
|
|
|
+#ifdef O_CTG
|
|
|
+ /*
|
|
|
+ * Contiguous files (on the Masscomp) have to specify
|
|
|
+ * the size in the open call that creates them.
|
|
|
+ */
|
|
|
+ if (head->header.linkflag == LF_CONTIG)
|
|
|
+ fd = open(skipcrud+head->header.name, openflag | O_CTG,
|
|
|
+ hstat.st_mode, hstat.st_size);
|
|
|
+ else
|
|
|
+#endif
|
|
|
+ {
|
|
|
+#ifdef NO_OPEN3
|
|
|
+ /*
|
|
|
+ * On raw V7 we won't let them specify -k (f_keep), but
|
|
|
+ * we just bull ahead and create the files.
|
|
|
+ */
|
|
|
+ fd = creat(skipcrud+head->header.name,
|
|
|
+ hstat.st_mode);
|
|
|
+#else
|
|
|
+ /*
|
|
|
+ * With 3-arg open(), we can do this up right.
|
|
|
+ */
|
|
|
+ fd = open(skipcrud+head->header.name, openflag,
|
|
|
+ hstat.st_mode);
|
|
|
+#endif
|
|
|
+ }
|
|
|
+
|
|
|
+ if (fd < 0) {
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto again_file;
|
|
|
+ msg_perror("Could not create file %s",skipcrud+head->header.name);
|
|
|
+ if (head->header.isextended)
|
|
|
+ skip_extended_headers();
|
|
|
+ skip_file((long)hstat.st_size);
|
|
|
+ goto quit;
|
|
|
+ }
|
|
|
+
|
|
|
+ extract_file:
|
|
|
+ if (head->header.linkflag == LF_SPARSE) {
|
|
|
+ char *name;
|
|
|
+ int namelen;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Kludge alert. NAME is assigned to header.name
|
|
|
+ * because during the extraction, the space that
|
|
|
+ * contains the header will get scribbled on, and
|
|
|
+ * the name will get munged, so any error messages
|
|
|
+ * that happen to contain the filename will look
|
|
|
+ * REAL interesting unless we do this.
|
|
|
+ */
|
|
|
+ namelen = strlen(skipcrud+head->header.name);
|
|
|
+ name = (char *) malloc((sizeof(char)) * namelen);
|
|
|
+ bcopy(skipcrud+head->header.name, name, namelen);
|
|
|
+ size = hstat.st_size;
|
|
|
+ extract_sparse_file(fd, &size, hstat.st_size,
|
|
|
+ name);
|
|
|
+ }
|
|
|
+ else
|
|
|
+ for (size = hstat.st_size;
|
|
|
+ size > 0;
|
|
|
+ size -= written) {
|
|
|
+
|
|
|
+/* long offset,
|
|
|
+ numbytes;*/
|
|
|
+
|
|
|
+ if(f_multivol) {
|
|
|
+ save_name=head->header.name;
|
|
|
+ save_totsize=hstat.st_size;
|
|
|
+ save_sizeleft=size;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Locate data, determine max length
|
|
|
+ * writeable, write it, record that
|
|
|
+ * we have used the data, then check
|
|
|
+ * if the write worked.
|
|
|
+ */
|
|
|
+ data = findrec()->charptr;
|
|
|
+ if (data == NULL) { /* Check it... */
|
|
|
+ msg("Unexpected EOF on archive file");
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * JK - If the file is sparse, use the sparsearray
|
|
|
+ * that we created before to lseek into the new
|
|
|
+ * file the proper amount, and to see how many
|
|
|
+ * bytes we want to write at that position.
|
|
|
+ */
|
|
|
+/* if (head->header.linkflag == LF_SPARSE) {
|
|
|
+ off_t pos;
|
|
|
+
|
|
|
+ pos = lseek(fd, (off_t) sparsearray[sparse_ind].offset, 0);
|
|
|
+ printf("%d at %d\n", (int) pos, sparse_ind);
|
|
|
+ written = sparsearray[sparse_ind++].numbytes;
|
|
|
+ } else*/
|
|
|
+ written = endofrecs()->charptr - data;
|
|
|
+ if (written > size)
|
|
|
+ written = size;
|
|
|
+ errno = 0;
|
|
|
+ check = write(fd, data, written);
|
|
|
+ /*
|
|
|
+ * The following is in violation of strict
|
|
|
+ * typing, since the arg to userec
|
|
|
+ * should be a struct rec *. FIXME.
|
|
|
+ */
|
|
|
+ userec((union record *)(data + written - 1));
|
|
|
+ if (check == written) continue;
|
|
|
+ /*
|
|
|
+ * Error in writing to file.
|
|
|
+ * Print it, skip to next file in archive.
|
|
|
+ */
|
|
|
+ if(check<0)
|
|
|
+ msg_perror("couldn't write to file %s",skipcrud+head->header.name);
|
|
|
+ else
|
|
|
+ msg("could only write %d of %d bytes to file %s",written,check,skipcrud+head->header.name);
|
|
|
+ skip_file((long)(size - written));
|
|
|
+ break; /* Still do the close, mod time, chmod, etc */
|
|
|
+ }
|
|
|
+
|
|
|
+ if(f_multivol)
|
|
|
+ save_name = 0;
|
|
|
+
|
|
|
+ /* If writing to stdout, don't try to do anything
|
|
|
+ to the filename; it doesn't exist, or we don't
|
|
|
+ want to touch it anyway */
|
|
|
+ if(f_exstdout)
|
|
|
+ break;
|
|
|
+
|
|
|
+/* if (head->header.isextended) {
|
|
|
+ register union record *exhdr;
|
|
|
+ register int i;
|
|
|
+
|
|
|
+ for (i = 0; i < 21; i++) {
|
|
|
+ long offset;
|
|
|
+
|
|
|
+ if (!exhdr->ext_hdr.sp[i].numbytes)
|
|
|
+ break;
|
|
|
+ offset = from_oct(1+12,
|
|
|
+ exhdr->ext_hdr.sp[i].offset);
|
|
|
+ written = from_oct(1+12,
|
|
|
+ exhdr->ext_hdr.sp[i].numbytes);
|
|
|
+ lseek(fd, offset, 0);
|
|
|
+ check = write(fd, data, written);
|
|
|
+ if (check == written) continue;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ }*/
|
|
|
+ check = close(fd);
|
|
|
+ if (check < 0) {
|
|
|
+ msg_perror("Error while closing %s",skipcrud+head->header.name);
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ set_filestat:
|
|
|
+
|
|
|
+ /*
|
|
|
+ * If we are root, set the owner and group of the extracted
|
|
|
+ * file. This does what is wanted both on real Unix and on
|
|
|
+ * System V. If we are running as a user, we extract as that
|
|
|
+ * user; if running as root, we extract as the original owner.
|
|
|
+ */
|
|
|
+ if (we_are_root || f_do_chown) {
|
|
|
+ if (chown(skipcrud+head->header.name, hstat.st_uid,
|
|
|
+ hstat.st_gid) < 0) {
|
|
|
+ msg_perror("cannot chown file %s to uid %d gid %d",skipcrud+head->header.name,hstat.st_uid,hstat.st_gid);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Set the modified time of the file.
|
|
|
+ *
|
|
|
+ * Note that we set the accessed time to "now", which
|
|
|
+ * is really "the time we started extracting files".
|
|
|
+ * unless f_gnudump is used, in which case .st_atime is used
|
|
|
+ */
|
|
|
+ if (!f_modified) {
|
|
|
+ /* fixme if f_gnudump should set ctime too, but how? */
|
|
|
+ if(f_gnudump)
|
|
|
+ acc_upd_times[0]=hstat.st_atime;
|
|
|
+ else acc_upd_times[0] = now; /* Accessed now */
|
|
|
+ acc_upd_times[1] = hstat.st_mtime; /* Mod'd */
|
|
|
+ if (utime(skipcrud+head->header.name,
|
|
|
+ acc_upd_times) < 0) {
|
|
|
+ msg_perror("couldn't change access and modification times of %s",skipcrud+head->header.name);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ /* We do the utime before the chmod because some versions of
|
|
|
+ utime are broken and trash the modes of the file. Since
|
|
|
+ we then change the mode anyway, we don't care. . . */
|
|
|
+
|
|
|
+ /*
|
|
|
+ * If '-k' is not set, open() or creat() could have saved
|
|
|
+ * the permission bits from a previously created file,
|
|
|
+ * ignoring the ones we specified.
|
|
|
+ * Even if -k is set, if the file has abnormal
|
|
|
+ * mode bits, we must chmod since writing or chown() has
|
|
|
+ * probably reset them.
|
|
|
+ *
|
|
|
+ * If -k is set, we know *we* created this file, so the mode
|
|
|
+ * bits were set by our open(). If the file is "normal", we
|
|
|
+ * skip the chmod. This works because we did umask(0) if -p
|
|
|
+ * is set, so umask will have left the specified mode alone.
|
|
|
+ */
|
|
|
+ if ((!f_keep)
|
|
|
+ || (hstat.st_mode & (S_ISUID|S_ISGID|S_ISVTX))) {
|
|
|
+ if (chmod(skipcrud+head->header.name,
|
|
|
+ notumask & (int)hstat.st_mode) < 0) {
|
|
|
+ msg_perror("cannot change mode of file %s to %ld",skipcrud+head->header.name,notumask & (int)hstat.st_mode);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ quit:
|
|
|
+ break;
|
|
|
+
|
|
|
+ case LF_LINK:
|
|
|
+ again_link:
|
|
|
+ {
|
|
|
+ struct stat st1,st2;
|
|
|
+
|
|
|
+ check = link (head->header.linkname,
|
|
|
+ skipcrud+head->header.name);
|
|
|
+ if (check == 0)
|
|
|
+ break;
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto again_link;
|
|
|
+ if(f_gnudump && errno==EEXIST)
|
|
|
+ break;
|
|
|
+ if( stat(head->header.linkname, &st1) == 0
|
|
|
+ && stat(skipcrud+head->header.name, &st2)==0
|
|
|
+ && st1.st_dev==st2.st_dev
|
|
|
+ && st1.st_ino==st2.st_ino)
|
|
|
+ break;
|
|
|
+ msg_perror("Could not link %s to %s",
|
|
|
+ skipcrud+head->header.name,head->header.linkname);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+#ifdef S_ISLNK
|
|
|
+ case LF_SYMLINK:
|
|
|
+ again_symlink:
|
|
|
+ check = symlink(head->header.linkname,
|
|
|
+ skipcrud+head->header.name);
|
|
|
+ /* FIXME, don't worry uid, gid, etc... */
|
|
|
+ if (check == 0)
|
|
|
+ break;
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto again_symlink;
|
|
|
+ msg_perror("Could not create symlink to %s",head->header.linkname);
|
|
|
+ break;
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef S_IFCHR
|
|
|
+ case LF_CHR:
|
|
|
+ hstat.st_mode |= S_IFCHR;
|
|
|
+ goto make_node;
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef S_IFBLK
|
|
|
+ case LF_BLK:
|
|
|
+ hstat.st_mode |= S_IFBLK;
|
|
|
+#endif
|
|
|
+#if defined(S_IFCHR) || defined(S_IFBLK)
|
|
|
+ make_node:
|
|
|
+ check = mknod(skipcrud+head->header.name,
|
|
|
+ (int) hstat.st_mode, (int) hstat.st_rdev);
|
|
|
+ if (check != 0) {
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto make_node;
|
|
|
+ msg_perror("Could not make %s",skipcrud+head->header.name);
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ goto set_filestat;
|
|
|
+#endif
|
|
|
+
|
|
|
+#ifdef S_ISFIFO
|
|
|
+ /* If local system doesn't support FIFOs, use default case */
|
|
|
+ case LF_FIFO:
|
|
|
+ make_fifo:
|
|
|
+ check = mkfifo(skipcrud+head->header.name,
|
|
|
+ (int) hstat.st_mode);
|
|
|
+ if (check != 0) {
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto make_fifo;
|
|
|
+ msg_perror("Could not make %s",skipcrud+head->header.name);
|
|
|
+ break;
|
|
|
+ };
|
|
|
+ goto set_filestat;
|
|
|
+#endif
|
|
|
+
|
|
|
+ case LF_DIR:
|
|
|
+ case LF_DUMPDIR:
|
|
|
+ namelen = strlen(skipcrud+head->header.name)-1;
|
|
|
+ really_dir:
|
|
|
+ /* Check for trailing /, and zap as many as we find. */
|
|
|
+ while (namelen && head->header.name[skipcrud+namelen] == '/')
|
|
|
+ head->header.name[skipcrud+namelen--] = '\0';
|
|
|
+ if(f_gnudump) { /* Read the entry and delete files
|
|
|
+ that aren't listed in the archive */
|
|
|
+ gnu_restore(skipcrud);
|
|
|
+
|
|
|
+ } else if(head->header.linkflag==LF_DUMPDIR)
|
|
|
+ skip_file((long)(hstat.st_size));
|
|
|
+
|
|
|
+
|
|
|
+ again_dir:
|
|
|
+ check = mkdir(skipcrud+head->header.name,
|
|
|
+ (we_are_root ? 0 : 0300) | (int)hstat.st_mode);
|
|
|
+ if (check != 0) {
|
|
|
+ struct stat st1;
|
|
|
+
|
|
|
+ if (make_dirs(skipcrud+head->header.name))
|
|
|
+ goto again_dir;
|
|
|
+ /* If we're trying to create '.', let it be. */
|
|
|
+ if (head->header.name[skipcrud+namelen] == '.' &&
|
|
|
+ (namelen==0 ||
|
|
|
+ head->header.name[skipcrud+namelen-1]=='/'))
|
|
|
+ goto check_perms;
|
|
|
+ if( errno==EEXIST
|
|
|
+ && stat(skipcrud+head->header.name,&st1)==0
|
|
|
+ && (S_ISDIR(st1.st_mode)))
|
|
|
+ break;
|
|
|
+ msg_perror("Could not create directory %s",skipcrud+head->header.name);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ check_perms:
|
|
|
+ if (!we_are_root && 0300 != (0300 & (int) hstat.st_mode)) {
|
|
|
+ hstat.st_mode |= 0300;
|
|
|
+ msg("Added write and execute permission to directory %s",
|
|
|
+ skipcrud+head->header.name);
|
|
|
+ }
|
|
|
+
|
|
|
+ goto set_filestat;
|
|
|
+ /* FIXME, Remember timestamps for after files created? */
|
|
|
+ /* FIXME, change mode after files created (if was R/O dir) */
|
|
|
+ case LF_VOLHDR:
|
|
|
+ if(f_verbose) {
|
|
|
+ printf("Reading %s\n",head->header.name);
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+ case LF_NAMES:
|
|
|
+ extract_mangle(head);
|
|
|
+ break;
|
|
|
+
|
|
|
+ case LF_MULTIVOL:
|
|
|
+ msg("Can't extract '%s'--file is continued from another volume\n",head->header.name);
|
|
|
+ skip_file((long)hstat.st_size);
|
|
|
+ break;
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ /* We don't need to save it any longer. */
|
|
|
+ saverec((union record **) 0); /* Unsave it */
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * After a file/link/symlink/dir creation has failed, see if
|
|
|
+ * it's because some required directory was not present, and if
|
|
|
+ * so, create all required dirs.
|
|
|
+ */
|
|
|
+int
|
|
|
+make_dirs(pathname)
|
|
|
+ char *pathname;
|
|
|
+{
|
|
|
+ char *p; /* Points into path */
|
|
|
+ int madeone = 0; /* Did we do anything yet? */
|
|
|
+ int save_errno = errno; /* Remember caller's errno */
|
|
|
+ int check;
|
|
|
+
|
|
|
+ if (errno != ENOENT)
|
|
|
+ return 0; /* Not our problem */
|
|
|
+
|
|
|
+ for (p = index(pathname, '/'); p != NULL; p = index(p+1, '/')) {
|
|
|
+ /* Avoid mkdir of empty string, if leading or double '/' */
|
|
|
+ if (p == pathname || p[-1] == '/')
|
|
|
+ continue;
|
|
|
+ /* Avoid mkdir where last part of path is '.' */
|
|
|
+ if (p[-1] == '.' && (p == pathname+1 || p[-2] == '/'))
|
|
|
+ continue;
|
|
|
+ *p = 0; /* Truncate the path there */
|
|
|
+ check = mkdir (pathname, 0777); /* Try to create it as a dir */
|
|
|
+ if (check == 0) {
|
|
|
+ /* Fix ownership */
|
|
|
+ if (we_are_root) {
|
|
|
+ if (chown(pathname, hstat.st_uid,
|
|
|
+ hstat.st_gid) < 0) {
|
|
|
+ msg_perror("cannot change owner of %s to uid %d gid %d",pathname,hstat.st_uid,hstat.st_gid);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ pr_mkdir(pathname, p-pathname, notumask&0777);
|
|
|
+ madeone++; /* Remember if we made one */
|
|
|
+ *p = '/';
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+ *p = '/';
|
|
|
+ if (errno == EEXIST) /* Directory already exists */
|
|
|
+ continue;
|
|
|
+ /*
|
|
|
+ * Some other error in the mkdir. We return to the caller.
|
|
|
+ */
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ errno = save_errno; /* Restore caller's errno */
|
|
|
+ return madeone; /* Tell them to retry if we made one */
|
|
|
+}
|
|
|
+
|
|
|
+void
|
|
|
+extract_sparse_file(fd, sizeleft, totalsize, name)
|
|
|
+ int fd;
|
|
|
+ long *sizeleft,
|
|
|
+ totalsize;
|
|
|
+ char *name;
|
|
|
+{
|
|
|
+/* register char *data;*/
|
|
|
+ union record *datarec;
|
|
|
+ int sparse_ind = 0;
|
|
|
+ int written,
|
|
|
+ count;
|
|
|
+
|
|
|
+ /* assuming sizeleft is initially totalsize */
|
|
|
+
|
|
|
+
|
|
|
+ while (*sizeleft > 0) {
|
|
|
+ datarec = findrec();
|
|
|
+ if (datarec == NULL) {
|
|
|
+ msg("Unexpected EOF on archive file");
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ lseek(fd, sparsearray[sparse_ind].offset, 0);
|
|
|
+ written = sparsearray[sparse_ind++].numbytes;
|
|
|
+ while (written > RECORDSIZE) {
|
|
|
+ count = write(fd, datarec->charptr, RECORDSIZE);
|
|
|
+ if (count < 0)
|
|
|
+ msg_perror("couldn't write to file %s", name);
|
|
|
+ written -= count;
|
|
|
+ *sizeleft -= count;
|
|
|
+ userec(datarec);
|
|
|
+ datarec = findrec();
|
|
|
+ }
|
|
|
+
|
|
|
+ count = write(fd, datarec->charptr, written);
|
|
|
+
|
|
|
+ if (count < 0) {
|
|
|
+ msg_perror("couldn't write to file %s", name);
|
|
|
+ } else if (count != written) {
|
|
|
+ msg("could only write %d of %d bytes to file %s", totalsize - *sizeleft, totalsize, name);
|
|
|
+ skip_file((long) (*sizeleft));
|
|
|
+ }
|
|
|
+
|
|
|
+ written -= count;
|
|
|
+ *sizeleft -= count;
|
|
|
+ userec(datarec);
|
|
|
+ }
|
|
|
+ free(sparsearray);
|
|
|
+/* if (end_nulls) {
|
|
|
+ register int i;
|
|
|
+
|
|
|
+ printf("%d\n", (int) end_nulls);
|
|
|
+ for (i = 0; i < end_nulls; i++)
|
|
|
+ write(fd, "\000", 1);
|
|
|
+ }*/
|
|
|
+ userec(datarec);
|
|
|
+}
|