diff options
| -rw-r--r-- | archival/libunarchive/get_header_cpio.c | 93 | ||||
| -rw-r--r-- | archival/libunarchive/init_handle.c | 2 |
2 files changed, 55 insertions, 40 deletions
diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c index dd48cb0..f0b07b5 100644 --- a/archival/libunarchive/get_header_cpio.c +++ b/archival/libunarchive/get_header_cpio.c @@ -8,7 +8,7 @@ #include "unarchive.h" typedef struct hardlinks_s { - file_header_t *entry; + char *name; int inode; struct hardlinks_s *next; } hardlinks_t; @@ -17,46 +17,66 @@ char get_header_cpio(archive_handle_t *archive_handle) { static hardlinks_t *saved_hardlinks = NULL; static unsigned short pending_hardlinks = 0; + static int inode; file_header_t *file_header = archive_handle->file_header; char cpio_header[110]; int namesize; char dummy[16]; - int major, minor, nlink, inode; + int major, minor, nlink; if (pending_hardlinks) { /* Deal with any pending hardlinks */ - hardlinks_t *tmp; - hardlinks_t *oldtmp; + hardlinks_t *tmp, *oldtmp; tmp = saved_hardlinks; oldtmp = NULL; + file_header->link_name = file_header->name; + file_header->size = 0; + while (tmp) { - bb_error_msg_and_die("need to fix this"); - if (tmp->entry->link_name) { /* Found a hardlink ready to be extracted */ - file_header = tmp->entry; - if (oldtmp) { - oldtmp->next = tmp->next; /* Remove item from linked list */ - } else { - saved_hardlinks = tmp->next; - } - free(tmp); + if (tmp->inode != inode) { + tmp = tmp->next; continue; } + + file_header->name = tmp->name; + + if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { + archive_handle->action_data(archive_handle); + archive_handle->action_header(archive_handle->file_header); + } + + pending_hardlinks--; + oldtmp = tmp; tmp = tmp->next; + free(oldtmp->name); + free(oldtmp); + if (oldtmp == saved_hardlinks) + saved_hardlinks = tmp; + } + + file_header->name = file_header->link_name; + + if (pending_hardlinks > 1) { + bb_error_msg("error resolving hardlink: archive made by GNU cpio 2.0-2.2?"); } - pending_hardlinks = 0; /* No more pending hardlinks, read next file entry */ + + /* No more pending hardlinks, read next file entry */ + pending_hardlinks = 0; } /* There can be padding before archive header */ data_align(archive_handle, 4); if (archive_xread_all_eof(archive_handle, (unsigned char*)cpio_header, 110) == 0) { - return(EXIT_FAILURE); + return EXIT_FAILURE; } archive_handle->offset += 110; - if ((strncmp(&cpio_header[0], "07070", 5) != 0) || ((cpio_header[5] != '1') && (cpio_header[5] != '2'))) { + if (strncmp(&cpio_header[0], "07070", 5) != 0 + || (cpio_header[5] != '1' && cpio_header[5] != '2') + ) { bb_error_msg_and_die("unsupported cpio format, use newc or crc"); } @@ -70,7 +90,8 @@ char get_header_cpio(archive_handle_t *archive_handle) file_header->size = tmpsize; } - file_header->name = (char *) xzalloc(namesize + 1); + free(file_header->name); + file_header->name = xzalloc(namesize + 1); /* Read in filename */ xread(archive_handle->src_fd, file_header->name, namesize); archive_handle->offset += namesize; @@ -79,26 +100,29 @@ char get_header_cpio(archive_handle_t *archive_handle) data_align(archive_handle, 4); if (strcmp(file_header->name, "TRAILER!!!") == 0) { - printf("%d blocks\n", (int) (archive_handle->offset % 512 ? (archive_handle->offset / 512) + 1 : archive_handle->offset / 512)); /* Always round up */ + /* Always round up */ + printf("%d blocks\n", (int) (archive_handle->offset % 512 ? + archive_handle->offset / 512 + 1 : + archive_handle->offset / 512 + )); if (saved_hardlinks) { /* Bummer - we still have unresolved hardlinks */ hardlinks_t *tmp = saved_hardlinks; hardlinks_t *oldtmp = NULL; while (tmp) { - bb_error_msg("%s not created: cannot resolve hardlink", tmp->entry->name); + bb_error_msg("%s not created: cannot resolve hardlink", tmp->name); oldtmp = tmp; tmp = tmp->next; - free (oldtmp->entry->name); - free (oldtmp->entry); - free (oldtmp); + free(oldtmp->name); + free(oldtmp); } saved_hardlinks = NULL; pending_hardlinks = 0; } - return(EXIT_FAILURE); + return EXIT_FAILURE; } if (S_ISLNK(file_header->mode)) { - file_header->link_name = (char *) xzalloc(file_header->size + 1); + file_header->link_name = xzalloc(file_header->size + 1); xread(archive_handle->src_fd, file_header->link_name, file_header->size); archive_handle->offset += file_header->size; file_header->size = 0; /* Stop possible seeks in future */ @@ -110,23 +134,14 @@ char get_header_cpio(archive_handle_t *archive_handle) hardlinks_t *new = xmalloc(sizeof(hardlinks_t)); new->next = saved_hardlinks; new->inode = inode; - new->entry = file_header; + /* name current allocated, freed later */ + new->name = file_header->name; + file_header->name = NULL; saved_hardlinks = new; - return(EXIT_SUCCESS); // Skip this one - } else { /* Found the file with data in */ - hardlinks_t *tmp = saved_hardlinks; - pending_hardlinks = 1; - while (tmp) { - if (tmp->inode == inode) { - tmp->entry->link_name = xstrdup(file_header->name); - nlink--; - } - tmp = tmp->next; - } - if (nlink > 1) { - bb_error_msg("error resolving hardlink: did you create the archive with GNU cpio 2.0-2.2?"); - } + return EXIT_SUCCESS; /* Skip this one */ } + /* Found the file with data in */ + pending_hardlinks = nlink; } file_header->device = makedev(major, minor); diff --git a/archival/libunarchive/init_handle.c b/archival/libunarchive/init_handle.c index 06e8d1f..309d329 100644 --- a/archival/libunarchive/init_handle.c +++ b/archival/libunarchive/init_handle.c @@ -12,7 +12,7 @@ archive_handle_t *init_handle(void) /* Initialize default values */ archive_handle = xzalloc(sizeof(archive_handle_t)); - archive_handle->file_header = xmalloc(sizeof(file_header_t)); + archive_handle->file_header = xzalloc(sizeof(file_header_t)); archive_handle->action_header = header_skip; archive_handle->action_data = data_skip; archive_handle->filter = filter_accept_all; |