union record *exhdr;
struct saved_dir_info *tmp;
/* int end_nulls; */
+ char **longp;
+ static char *longname;
+ static char *longlink;
saverec(&head); /* Make sure it sticks around */
userec(head); /* And go past it in the archive */
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? */
+ }
+ }
+
+ 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 */
skip_file((long)hstat.st_size);
break;
+ case LF_LONGNAME:
+ longp = &longname;
+ goto extract_long;
+
+ case LF_LONGLINK
+ longp = &longlink;
+ extract_long:
+
+ if (*longp)
+ free (*longp);
+ *longp = ck_malloc (hstat.st_size);
+
+ /* This loop is copied from the extract_file label above;
+ as a result, some of the variable names (like `written')
+ might be confusing. */
+ for (size = hstat.st_size;
+ size > 0;
+ size -= written)
+ {
+
+
+
}
/* We don't need to save it any longer. */
projects / chaz / tar / commitdiff
