diff options
Diffstat (limited to 'archival/libunarchive/get_header_cpio.c')
| -rw-r--r-- | archival/libunarchive/get_header_cpio.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/archival/libunarchive/get_header_cpio.c b/archival/libunarchive/get_header_cpio.c deleted file mode 100644 index 8cd1096ba..000000000 --- a/archival/libunarchive/get_header_cpio.c +++ /dev/null @@ -1,186 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* Copyright 2002 Laurence Anderson - * - * Licensed under GPLv2 or later, see file LICENSE in this source tree. - */ - -#include "libbb.h" -#include "unarchive.h" - -typedef struct hardlinks_t { - struct hardlinks_t *next; - int inode; /* TODO: must match maj/min too! */ - int mode ; - int mtime; /* These three are useful only in corner case */ - int uid ; /* of hardlinks with zero size body */ - int gid ; - char name[1]; -} hardlinks_t; - -char FAST_FUNC get_header_cpio(archive_handle_t *archive_handle) -{ - file_header_t *file_header = archive_handle->file_header; - char cpio_header[110]; - int namesize; - int major, minor, nlink, mode, inode; - unsigned size, uid, gid, mtime; - - /* There can be padding before archive header */ - data_align(archive_handle, 4); - - size = full_read(archive_handle->src_fd, cpio_header, 110); - if (size == 0) { - goto create_hardlinks; - } - if (size != 110) { - bb_error_msg_and_die("short read"); - } - archive_handle->offset += 110; - - 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"); - } - - if (sscanf(cpio_header + 6, - "%8x" "%8x" "%8x" "%8x" - "%8x" "%8x" "%8x" /*maj,min:*/ "%*16c" - /*rmaj,rmin:*/"%8x" "%8x" "%8x" /*chksum: "%*8c"*/, - &inode, &mode, &uid, &gid, - &nlink, &mtime, &size, - &major, &minor, &namesize) != 10) - bb_error_msg_and_die("damaged cpio file"); - file_header->mode = mode; - file_header->uid = uid; - file_header->gid = gid; - file_header->mtime = mtime; - file_header->size = size; - - namesize &= 0x1fff; /* paranoia: limit names to 8k chars */ - file_header->name = xzalloc(namesize + 1); - /* Read in filename */ - xread(archive_handle->src_fd, file_header->name, namesize); - if (file_header->name[0] == '/') { - /* Testcase: echo /etc/hosts | cpio -pvd /tmp - * Without this code, it tries to unpack /etc/hosts - * into "/etc/hosts", not "etc/hosts". - */ - char *p = file_header->name; - do p++; while (*p == '/'); - overlapping_strcpy(file_header->name, p); - } - archive_handle->offset += namesize; - - /* Update offset amount and skip padding before file contents */ - data_align(archive_handle, 4); - - if (strcmp(file_header->name, "TRAILER!!!") == 0) { - /* Always round up. ">> 9" divides by 512 */ - archive_handle->cpio__blocks = (uoff_t)(archive_handle->offset + 511) >> 9; - goto create_hardlinks; - } - - file_header->link_target = NULL; - if (S_ISLNK(file_header->mode)) { - file_header->size &= 0x1fff; /* paranoia: limit names to 8k chars */ - file_header->link_target = xzalloc(file_header->size + 1); - xread(archive_handle->src_fd, file_header->link_target, file_header->size); - archive_handle->offset += file_header->size; - file_header->size = 0; /* Stop possible seeks in future */ - } - -// TODO: data_extract_all can't deal with hardlinks to non-files... -// when fixed, change S_ISREG to !S_ISDIR here - - if (nlink > 1 && S_ISREG(file_header->mode)) { - hardlinks_t *new = xmalloc(sizeof(*new) + namesize); - new->inode = inode; - new->mode = mode ; - new->mtime = mtime; - new->uid = uid ; - new->gid = gid ; - strcpy(new->name, file_header->name); - /* Put file on a linked list for later */ - if (size == 0) { - new->next = archive_handle->cpio__hardlinks_to_create; - archive_handle->cpio__hardlinks_to_create = new; - return EXIT_SUCCESS; /* Skip this one */ - /* TODO: this breaks cpio -t (it does not show hardlinks) */ - } - new->next = archive_handle->cpio__created_hardlinks; - archive_handle->cpio__created_hardlinks = new; - } - file_header->device = makedev(major, minor); - - if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) { - archive_handle->action_data(archive_handle); -//TODO: run "echo /etc/hosts | cpio -pv /tmp" twice. On 2nd run: -//cpio: etc/hosts not created: newer or same age file exists -//etc/hosts <-- should NOT show it -//2 blocks <-- should say "0 blocks" - archive_handle->action_header(file_header); - } else { - data_skip(archive_handle); - } - - archive_handle->offset += file_header->size; - - free(file_header->link_target); - free(file_header->name); - file_header->link_target = NULL; - file_header->name = NULL; - - return EXIT_SUCCESS; - - create_hardlinks: - free(file_header->link_target); - free(file_header->name); - - while (archive_handle->cpio__hardlinks_to_create) { - hardlinks_t *cur; - hardlinks_t *make_me = archive_handle->cpio__hardlinks_to_create; - - archive_handle->cpio__hardlinks_to_create = make_me->next; - - memset(file_header, 0, sizeof(*file_header)); - file_header->mtime = make_me->mtime; - file_header->name = make_me->name; - file_header->mode = make_me->mode; - file_header->uid = make_me->uid; - file_header->gid = make_me->gid; - /*file_header->size = 0;*/ - /*file_header->link_target = NULL;*/ - - /* Try to find a file we are hardlinked to */ - cur = archive_handle->cpio__created_hardlinks; - while (cur) { - /* TODO: must match maj/min too! */ - if (cur->inode == make_me->inode) { - file_header->link_target = cur->name; - /* link_target != NULL, size = 0: "I am a hardlink" */ - if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) - archive_handle->action_data(archive_handle); - free(make_me); - goto next_link; - } - cur = cur->next; - } - /* Oops... no file with such inode was created... do it now - * (happens when hardlinked files are empty (zero length)) */ - if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) - archive_handle->action_data(archive_handle); - /* Move to the list of created hardlinked files */ - make_me->next = archive_handle->cpio__created_hardlinks; - archive_handle->cpio__created_hardlinks = make_me; - next_link: ; - } - - while (archive_handle->cpio__created_hardlinks) { - hardlinks_t *p = archive_handle->cpio__created_hardlinks; - archive_handle->cpio__created_hardlinks = p->next; - free(p); - } - - return EXIT_FAILURE; /* "No more files to process" */ -} |