/* copyin.c - extract or list a cpio archive Copyright (C) 1990-1992, 2001-2007, 2009-2010, 2014-2015 Free Software Foundation, Inc. This program 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 3, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include "filetypes.h" #include "cpiohdr.h" #include "dstring.h" #include "extern.h" #include "defer.h" #include #ifndef FNM_PATHNAME # include #endif #ifndef HAVE_LCHOWN # define lchown(f,u,g) 0 #endif static void copyin_regular_file(struct cpio_file_stat* file_hdr, int in_file_des); void warn_junk_bytes (long bytes_skipped) { error (0, 0, ngettext ("warning: skipped %ld byte of junk", "warning: skipped %ld bytes of junk", bytes_skipped), bytes_skipped); } static int query_rename(struct cpio_file_stat* file_hdr, FILE *tty_in, FILE *tty_out, FILE *rename_in) { char *str_res; /* Result for string function. */ static dynamic_string new_name; /* New file name for rename option. */ static int initialized_new_name = false; if (!initialized_new_name) { ds_init (&new_name, 128); initialized_new_name = true; } if (rename_flag) { fprintf (tty_out, _("rename %s -> "), file_hdr->c_name); fflush (tty_out); str_res = ds_fgets (tty_in, &new_name); } else { str_res = ds_fgetstr (rename_in, &new_name, '\n'); } if (str_res == NULL || str_res[0] == 0) { return -1; } else /* Debian hack: file_hrd.c_name is sometimes set to point to static memory by code in tar.c. This causes a segfault. This has been fixed and an additional check to ensure that the file name is not too long has been added. (Reported by Horst Knobloch.) This bug has been reported to "bug-gnu-utils@prep.ai.mit.edu". (99/1/6) -BEM */ { if (archive_format != arf_tar && archive_format != arf_ustar) { free (file_hdr->c_name); file_hdr->c_name = xstrdup (new_name.ds_string); } else { if (is_tar_filename_too_long (new_name.ds_string)) error (0, 0, _("%s: file name too long"), new_name.ds_string); else strcpy (file_hdr->c_name, new_name.ds_string); } } return 0; } /* Skip the padding on IN_FILE_DES after a header or file, up to the next header. The number of bytes skipped is based on OFFSET -- the current offset from the last start of a header (or file) -- and the current header type. */ static void tape_skip_padding (int in_file_des, off_t offset) { off_t pad; if (archive_format == arf_crcascii || archive_format == arf_newascii) pad = (4 - (offset % 4)) % 4; else if (archive_format == arf_binary || archive_format == arf_hpbinary) pad = (2 - (offset % 2)) % 2; else if (archive_format == arf_tar || archive_format == arf_ustar) pad = (512 - (offset % 512)) % 512; else pad = 0; if (pad != 0) tape_toss_input (in_file_des, pad); } static char * get_link_name (struct cpio_file_stat *file_hdr, int in_file_des) { char *link_name; if (file_hdr->c_filesize < 0 || file_hdr->c_filesize > SIZE_MAX-1) { error (0, 0, _("%s: stored filename length is out of range"), file_hdr->c_name); link_name = NULL; } else { link_name = xmalloc (file_hdr->c_filesize + 1); tape_buffered_read (link_name, in_file_des, file_hdr->c_filesize); link_name[file_hdr->c_filesize] = '\0'; tape_skip_padding (in_file_des, file_hdr->c_filesize); } return link_name; } static void list_file (struct cpio_file_stat* file_hdr, int in_file_des) { if (verbose_flag) { #ifdef CP_IFLNK if ((file_hdr->c_mode & CP_IFMT) == CP_IFLNK) { if (archive_format != arf_tar && archive_format != arf_ustar) { char *link_name = get_link_name (file_hdr, in_file_des); if (link_name) { long_format (file_hdr, link_name); free (link_name); } } else long_format (file_hdr, file_hdr->c_tar_linkname); return; } else #endif long_format (file_hdr, (char *) 0); } else { /* Debian hack: Modified to print a list of filenames terminiated by a null character when the -t and -0 flags are used. This has been submitted as a suggestion to "bug-gnu-utils@prep.ai.mit.edu". -BEM */ printf ("%s%c", file_hdr->c_name, name_end); } crc = 0; tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); if (only_verify_crc_flag) { #ifdef CP_IFLNK if ((file_hdr->c_mode & CP_IFMT) == CP_IFLNK) { return; /* links don't have a checksum */ } #endif if (crc != file_hdr->c_chksum) { error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"), file_hdr->c_name, crc, file_hdr->c_chksum); } } } static int try_existing_file (struct cpio_file_stat* file_hdr, int in_file_des, int *existing_dir) { struct stat file_stat; *existing_dir = false; if (lstat (file_hdr->c_name, &file_stat) == 0) { if (S_ISDIR (file_stat.st_mode) && ((file_hdr->c_mode & CP_IFMT) == CP_IFDIR)) { /* If there is already a directory there that we are trying to create, don't complain about it. */ *existing_dir = true; return 0; } else if (!unconditional_flag && file_hdr->c_mtime <= file_stat.st_mtime) { error (0, 0, _("%s not created: newer or same age version exists"), file_hdr->c_name); tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return -1; /* Go to the next file. */ } else if (S_ISDIR (file_stat.st_mode) ? rmdir (file_hdr->c_name) : unlink (file_hdr->c_name)) { error (0, errno, _("cannot remove current %s"), file_hdr->c_name); tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return -1; /* Go to the next file. */ } } return 0; } /* The newc and crc formats store multiply linked copies of the same file in the archive only once. The actual data is attached to the last link in the archive, and the other links all have a filesize of 0. When a file in the archive has multiple links and a filesize of 0, its data is probably "attatched" to another file in the archive, so we can't create it right away. We have to "defer" creating it until we have created the file that has the data "attatched" to it. We keep a list of the "defered" links on deferments. */ struct deferment *deferments = NULL; /* Add a file header to the deferments list. For now they all just go on one list, although we could optimize this if necessary. */ static void defer_copyin (struct cpio_file_stat *file_hdr) { struct deferment *d; d = create_deferment (file_hdr); d->next = deferments; deferments = d; return; } /* We just created a file that (probably) has some other links to it which have been defered. Go through all of the links on the deferments list and create any which are links to this file. */ static void create_defered_links (struct cpio_file_stat *file_hdr) { struct deferment *d; struct deferment *d_prev; ino_t ino; int maj; int min; int link_res; ino = file_hdr->c_ino; maj = file_hdr->c_dev_maj; min = file_hdr->c_dev_min; d = deferments; d_prev = NULL; while (d != NULL) { if ( (d->header.c_ino == ino) && (d->header.c_dev_maj == maj) && (d->header.c_dev_min == min) ) { struct deferment *d_free; link_res = link_to_name (d->header.c_name, file_hdr->c_name); if (link_res < 0) { error (0, errno, _("cannot link %s to %s"), d->header.c_name, file_hdr->c_name); } if (d_prev != NULL) d_prev->next = d->next; else deferments = d->next; d_free = d; d = d->next; free_deferment (d_free); } else { d_prev = d; d = d->next; } } } /* We are skipping a file but there might be other links to it that we did not skip, so we have to copy its data for the other links. Find the first link that we didn't skip and try to create that. That will then create the other deferred links. */ static int create_defered_links_to_skipped (struct cpio_file_stat *file_hdr, int in_file_des) { struct deferment *d; struct deferment *d_prev; ino_t ino; int maj; int min; if (file_hdr->c_filesize == 0) { /* The file doesn't have any data attached to it so we don't have to bother. */ return -1; } ino = file_hdr->c_ino; maj = file_hdr->c_dev_maj; min = file_hdr->c_dev_min; d = deferments; d_prev = NULL; while (d != NULL) { if ( (d->header.c_ino == ino) && (d->header.c_dev_maj == maj) && (d->header.c_dev_min == min) ) { if (d_prev != NULL) d_prev->next = d->next; else deferments = d->next; free (file_hdr->c_name); file_hdr->c_name = xstrdup(d->header.c_name); free_deferment (d); copyin_regular_file(file_hdr, in_file_des); return 0; } else { d_prev = d; d = d->next; } } return -1; } /* If we had a multiply linked file that really was empty then we would have defered all of its links, since we never found any with data "attached", and they will still be on the deferment list even when we are done reading the whole archive. Write out all of these empty links that are still on the deferments list. */ static void create_final_defers () { struct deferment *d; int link_res; int out_file_des; for (d = deferments; d != NULL; d = d->next) { /* Debian hack: A line, which could cause an endless loop, was removed (97/1/2). It was reported by Ronald F. Guilmette to the upstream maintainers. -BEM */ /* Debian hack: This was reported by Horst Knobloch. This bug has been reported to "bug-gnu-utils@prep.ai.mit.edu". (99/1/6) -BEM */ link_res = link_to_maj_min_ino (d->header.c_name, d->header.c_dev_maj, d->header.c_dev_min, d->header.c_ino); if (link_res == 0) { continue; } out_file_des = open (d->header.c_name, O_CREAT | O_WRONLY | O_BINARY, 0600); if (out_file_des < 0 && create_dir_flag) { create_all_directories (d->header.c_name); out_file_des = open (d->header.c_name, O_CREAT | O_WRONLY | O_BINARY, 0600); } if (out_file_des < 0) { open_error (d->header.c_name); continue; } set_perms (out_file_des, &d->header); if (close (out_file_des) < 0) close_error (d->header.c_name); } } static void copyin_regular_file (struct cpio_file_stat* file_hdr, int in_file_des) { int out_file_des; /* Output file descriptor. */ if (to_stdout_option) out_file_des = STDOUT_FILENO; else { /* Can the current file be linked to a previously copied file? */ if (file_hdr->c_nlink > 1 && (archive_format == arf_newascii || archive_format == arf_crcascii) ) { int link_res; if (file_hdr->c_filesize == 0) { /* The newc and crc formats store multiply linked copies of the same file in the archive only once. The actual data is attached to the last link in the archive, and the other links all have a filesize of 0. Since this file has multiple links and a filesize of 0, its data is probably attatched to another file in the archive. Save the link, and process it later when we get the actual data. We can't just create it with length 0 and add the data later, in case the file is readonly. We still lose if its parent directory is readonly (and we aren't running as root), but there's nothing we can do about that. */ defer_copyin (file_hdr); tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } /* If the file has data (filesize != 0), then presumably any other links have already been defer_copyin'ed(), but GNU cpio version 2.0-2.2 didn't do that, so we still have to check for links here (and also in case the archive was created and later appeneded to). */ /* Debian hack: (97/1/2) This was reported by Ronald F. Guilmette to the upstream maintainers. -BEM */ link_res = link_to_maj_min_ino (file_hdr->c_name, file_hdr->c_dev_maj, file_hdr->c_dev_min, file_hdr->c_ino); if (link_res == 0) { tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } } else if (file_hdr->c_nlink > 1 && archive_format != arf_tar && archive_format != arf_ustar) { int link_res; /* Debian hack: (97/1/2) This was reported by Ronald F. Guilmette to the upstream maintainers. -BEM */ link_res = link_to_maj_min_ino (file_hdr->c_name, file_hdr->c_dev_maj, file_hdr->c_dev_min, file_hdr->c_ino); if (link_res == 0) { tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } } else if ((archive_format == arf_tar || archive_format == arf_ustar) && file_hdr->c_tar_linkname && file_hdr->c_tar_linkname[0] != '\0') { int link_res; link_res = link_to_name (file_hdr->c_name, file_hdr->c_tar_linkname); if (link_res < 0) { error (0, errno, _("cannot link %s to %s"), file_hdr->c_tar_linkname, file_hdr->c_name); } return; } /* If not linked, copy the contents of the file. */ out_file_des = open (file_hdr->c_name, O_CREAT | O_WRONLY | O_BINARY, 0600); if (out_file_des < 0 && create_dir_flag) { create_all_directories (file_hdr->c_name); out_file_des = open (file_hdr->c_name, O_CREAT | O_WRONLY | O_BINARY, 0600); } if (out_file_des < 0) { open_error (file_hdr->c_name); tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } } crc = 0; if (swap_halfwords_flag) { if ((file_hdr->c_filesize % 4) == 0) swapping_halfwords = true; else error (0, 0, _("cannot swap halfwords of %s: odd number of halfwords"), file_hdr->c_name); } if (swap_bytes_flag) { if ((file_hdr->c_filesize % 2) == 0) swapping_bytes = true; else error (0, 0, _("cannot swap bytes of %s: odd number of bytes"), file_hdr->c_name); } copy_files_tape_to_disk (in_file_des, out_file_des, file_hdr->c_filesize); disk_empty_output_buffer (out_file_des, true); if (to_stdout_option) { if (archive_format == arf_crcascii) { if (crc != file_hdr->c_chksum) error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"), file_hdr->c_name, crc, file_hdr->c_chksum); } tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } set_perms (out_file_des, file_hdr); if (close (out_file_des) < 0) close_error (file_hdr->c_name); if (archive_format == arf_crcascii) { if (crc != file_hdr->c_chksum) error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"), file_hdr->c_name, crc, file_hdr->c_chksum); } tape_skip_padding (in_file_des, file_hdr->c_filesize); if (file_hdr->c_nlink > 1 && (archive_format == arf_newascii || archive_format == arf_crcascii) ) { /* (see comment above for how the newc and crc formats store multiple links). Now that we have the data for this file, create any other links to it which we defered. */ create_defered_links (file_hdr); } } static void copyin_device (struct cpio_file_stat* file_hdr) { int res; /* Result of various function calls. */ if (to_stdout_option) return; if (file_hdr->c_nlink > 1 && archive_format != arf_tar && archive_format != arf_ustar) { int link_res; /* Debian hack: This was reported by Horst Knobloch. This bug has been reported to "bug-gnu-utils@prep.ai.mit.edu". (99/1/6) -BEM */ link_res = link_to_maj_min_ino (file_hdr->c_name, file_hdr->c_dev_maj, file_hdr->c_dev_min, file_hdr->c_ino); if (link_res == 0) { return; } } else if (archive_format == arf_ustar && file_hdr->c_tar_linkname && file_hdr->c_tar_linkname [0] != '\0') { int link_res; link_res = link_to_name (file_hdr->c_name, file_hdr->c_tar_linkname); if (link_res < 0) { error (0, errno, _("cannot link %s to %s"), file_hdr->c_tar_linkname, file_hdr->c_name); /* Something must be wrong, because we couldn't find the file to link to. But can we assume that the device maj/min numbers are correct and fall through to the mknod? It's probably safer to just return, rather than possibly creating a bogus device file. */ } return; } res = mknod (file_hdr->c_name, file_hdr->c_mode, makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min)); if (res < 0 && create_dir_flag) { create_all_directories (file_hdr->c_name); res = mknod (file_hdr->c_name, file_hdr->c_mode, makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min)); } if (res < 0) { mknod_error (file_hdr->c_name); return; } if (!no_chown_flag) { uid_t uid = set_owner_flag ? set_owner : file_hdr->c_uid; gid_t gid = set_group_flag ? set_group : file_hdr->c_gid; if ((chown (file_hdr->c_name, uid, gid) < 0) && errno != EPERM) chown_error_details (file_hdr->c_name, uid, gid); } /* chown may have turned off some permissions we wanted. */ if (chmod (file_hdr->c_name, file_hdr->c_mode) < 0) chmod_error_details (file_hdr->c_name, file_hdr->c_mode); if (retain_time_flag) set_file_times (-1, file_hdr->c_name, file_hdr->c_mtime, file_hdr->c_mtime); } static void copyin_link (struct cpio_file_stat *file_hdr, int in_file_des) { char *link_name = NULL; /* Name of hard and symbolic links. */ int res; /* Result of various function calls. */ if (archive_format != arf_tar && archive_format != arf_ustar) { if (to_stdout_option) { tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); return; } link_name = get_link_name (file_hdr, in_file_des); if (!link_name) return; } else { if (to_stdout_option) return; link_name = xstrdup (file_hdr->c_tar_linkname); } res = UMASKED_SYMLINK (link_name, file_hdr->c_name, file_hdr->c_mode); if (res < 0 && create_dir_flag) { create_all_directories (file_hdr->c_name); res = UMASKED_SYMLINK (link_name, file_hdr->c_name, file_hdr->c_mode); } if (res < 0) { error (0, errno, _("%s: Cannot symlink to %s"), quotearg_colon (link_name), quote_n (1, file_hdr->c_name)); free (link_name); return; } if (!no_chown_flag) { uid_t uid = set_owner_flag ? set_owner : file_hdr->c_uid; gid_t gid = set_group_flag ? set_group : file_hdr->c_gid; if ((lchown (file_hdr->c_name, uid, gid) < 0) && errno != EPERM) chown_error_details (file_hdr->c_name, uid, gid); } free (link_name); } static void copyin_file (struct cpio_file_stat *file_hdr, int in_file_des) { int existing_dir; if (!to_stdout_option && try_existing_file (file_hdr, in_file_des, &existing_dir) < 0) return; /* Do the real copy or link. */ switch (file_hdr->c_mode & CP_IFMT) { case CP_IFREG: copyin_regular_file (file_hdr, in_file_des); break; case CP_IFDIR: cpio_create_dir (file_hdr, existing_dir); break; case CP_IFCHR: case CP_IFBLK: #ifdef CP_IFSOCK case CP_IFSOCK: #endif #ifdef CP_IFIFO case CP_IFIFO: #endif copyin_device (file_hdr); break; #ifdef CP_IFLNK case CP_IFLNK: copyin_link (file_hdr, in_file_des); break; #endif default: error (0, 0, _("%s: unknown file type"), file_hdr->c_name); tape_toss_input (in_file_des, file_hdr->c_filesize); tape_skip_padding (in_file_des, file_hdr->c_filesize); } } /* Current time for verbose table. */ static time_t current_time; /* Print the file described by FILE_HDR in long format. If LINK_NAME is nonzero, it is the name of the file that this file is a symbolic link to. */ void long_format (struct cpio_file_stat *file_hdr, char *link_name) { char mbuf[11]; char tbuf[40]; time_t when; mode_string (file_hdr->c_mode, mbuf); mbuf[10] = '\0'; /* Get time values ready to print. */ when = file_hdr->c_mtime; strcpy (tbuf, ctime (&when)); if (current_time - when > 6L * 30L * 24L * 60L * 60L || current_time - when < 0L) { /* The file is older than 6 months, or in the future. Show the year instead of the time of day. */ strcpy (tbuf + 11, tbuf + 19); } tbuf[16] = '\0'; printf ("%s %3lu ", mbuf, (unsigned long) file_hdr->c_nlink); if (numeric_uid) printf ("%-8u %-8u ", (unsigned int) file_hdr->c_uid, (unsigned int) file_hdr->c_gid); else printf ("%-8.8s %-8.8s ", getuser (file_hdr->c_uid), getgroup (file_hdr->c_gid)); if ((file_hdr->c_mode & CP_IFMT) == CP_IFCHR || (file_hdr->c_mode & CP_IFMT) == CP_IFBLK) printf ("%3lu, %3lu ", file_hdr->c_rdev_maj, file_hdr->c_rdev_min); else printf ("%8"PRIuMAX" ", (uintmax_t) file_hdr->c_filesize); printf ("%s ", tbuf + 4); print_name_with_quoting (file_hdr->c_name); if (link_name) { printf (" -> "); print_name_with_quoting (link_name); } putc ('\n', stdout); } void print_name_with_quoting (register char *p) { register unsigned char c; while ( (c = *p++) ) { switch (c) { case '\\': printf ("\\\\"); break; case '\n': printf ("\\n"); break; case '\b': printf ("\\b"); break; case '\r': printf ("\\r"); break; case '\t': printf ("\\t"); break; case '\f': printf ("\\f"); break; case ' ': printf ("\\ "); break; case '"': printf ("\\\""); break; default: if (c > 040 && c < 0177) putchar (c); else printf ("\\%03o", (unsigned int) c); } } } /* Read a pattern file (for the -E option). Put a list of `num_patterns' elements in `save_patterns'. Any patterns that were already in `save_patterns' (from the command line) are preserved. */ static void read_pattern_file () { int max_new_patterns; char **new_save_patterns; int new_num_patterns; int i; dynamic_string pattern_name; FILE *pattern_fp; if (num_patterns < 0) num_patterns = 0; max_new_patterns = 1 + num_patterns; new_save_patterns = (char **) xmalloc (max_new_patterns * sizeof (char *)); new_num_patterns = num_patterns; ds_init (&pattern_name, 128); pattern_fp = fopen (pattern_file_name, "r"); if (pattern_fp == NULL) open_fatal (pattern_file_name); while (ds_fgetstr (pattern_fp, &pattern_name, '\n') != NULL) { if (new_num_patterns >= max_new_patterns) { max_new_patterns += 1; new_save_patterns = (char **) xrealloc ((char *) new_save_patterns, max_new_patterns * sizeof (char *)); } new_save_patterns[new_num_patterns] = xstrdup (pattern_name.ds_string); ++new_num_patterns; } if (ferror (pattern_fp) || fclose (pattern_fp) == EOF) close_error (pattern_file_name); for (i = 0; i < num_patterns; ++i) new_save_patterns[i] = save_patterns[i]; save_patterns = new_save_patterns; num_patterns = new_num_patterns; } uintmax_t from_ascii (char const *where, size_t digs, unsigned logbase) { uintmax_t value = 0; char const *buf = where; char const *end = buf + digs; int overflow = 0; static char codetab[] = "0123456789ABCDEF"; for (; *buf == ' '; buf++) { if (buf == end) return 0; } if (buf == end || *buf == 0) return 0; while (1) { unsigned d; char *p = strchr (codetab, toupper (*buf)); if (!p) { error (0, 0, _("Malformed number %.*s"), digs, where); break; } d = p - codetab; if ((d >> logbase) > 1) { error (0, 0, _("Malformed number %.*s"), digs, where); break; } value += d; if (++buf == end || *buf == 0) break; overflow |= value ^ (value << logbase >> logbase); value <<= logbase; } if (overflow) error (0, 0, _("Archive value %.*s is out of range"), digs, where); return value; } /* Return 16-bit integer I with the bytes swapped. */ #define swab_short(i) ((((i) << 8) & 0xff00) | (((i) >> 8) & 0x00ff)) /* Read the header, including the name of the file, from file descriptor IN_DES into FILE_HDR. */ void read_in_header (struct cpio_file_stat *file_hdr, int in_des) { union { char str[6]; unsigned short num; struct old_cpio_header old_header; } magic; long bytes_skipped = 0; /* Bytes of junk found before magic number. */ /* Search for a valid magic number. */ if (archive_format == arf_unknown) { char tmpbuf[512]; int check_tar; int peeked_bytes; while (archive_format == arf_unknown) { peeked_bytes = tape_buffered_peek (tmpbuf, in_des, 512); if (peeked_bytes < 6) error (PAXEXIT_FAILURE, 0, _("premature end of archive")); if (!strncmp (tmpbuf, "070701", 6)) archive_format = arf_newascii; else if (!strncmp (tmpbuf, "070707", 6)) archive_format = arf_oldascii; else if (!strncmp (tmpbuf, "070702", 6)) { archive_format = arf_crcascii; crc_i_flag = true; } else if ((*((unsigned short *) tmpbuf) == 070707) || (*((unsigned short *) tmpbuf) == swab_short ((unsigned short) 070707))) archive_format = arf_binary; else if (peeked_bytes >= 512 && (check_tar = is_tar_header (tmpbuf))) { if (check_tar == 2) archive_format = arf_ustar; else archive_format = arf_tar; } else { tape_buffered_read ((char *) tmpbuf, in_des, 1L); ++bytes_skipped; } } } if (archive_format == arf_tar || archive_format == arf_ustar) { if (append_flag) last_header_start = input_bytes - io_block_size + (in_buff - input_buffer); if (bytes_skipped > 0) warn_junk_bytes (bytes_skipped); read_in_tar_header (file_hdr, in_des); return; } file_hdr->c_tar_linkname = NULL; tape_buffered_read (magic.str, in_des, sizeof (magic.str)); while (1) { if (append_flag) last_header_start = input_bytes - io_block_size + (in_buff - input_buffer) - 6; if (archive_format == arf_newascii && !strncmp (magic.str, "070701", 6)) { if (bytes_skipped > 0) warn_junk_bytes (bytes_skipped); file_hdr->c_magic = 070701; read_in_new_ascii (file_hdr, in_des); break; } if (archive_format == arf_crcascii && !strncmp (magic.str, "070702", 6)) { if (bytes_skipped > 0) warn_junk_bytes (bytes_skipped); file_hdr->c_magic = 070702; read_in_new_ascii (file_hdr, in_des); break; } if ( (archive_format == arf_oldascii || archive_format == arf_hpoldascii) && !strncmp (magic.str, "070707", 6)) { if (bytes_skipped > 0) warn_junk_bytes (bytes_skipped); file_hdr->c_magic = 070707; read_in_old_ascii (file_hdr, in_des); break; } if ( (archive_format == arf_binary || archive_format == arf_hpbinary) && (magic.num == 070707 || magic.num == swab_short ((unsigned short) 070707))) { /* Having to skip 1 byte because of word alignment is normal. */ if (bytes_skipped > 0) warn_junk_bytes (bytes_skipped); file_hdr->c_magic = 070707; read_in_binary (file_hdr, &magic.old_header, in_des); break; } bytes_skipped++; memmove (magic.str, magic.str + 1, sizeof (magic.str) - 1); tape_buffered_read (magic.str + sizeof (magic.str) - 1, in_des, 1L); } } /* Fill in FILE_HDR by reading an old-format ASCII format cpio header from file descriptor IN_DES, except for the magic number, which is already filled in. */ void read_in_old_ascii (struct cpio_file_stat *file_hdr, int in_des) { struct old_ascii_header ascii_header; unsigned long dev; tape_buffered_read (ascii_header.c_dev, in_des, sizeof ascii_header - sizeof ascii_header.c_magic); dev = FROM_OCTAL (ascii_header.c_dev); file_hdr->c_dev_maj = major (dev); file_hdr->c_dev_min = minor (dev); file_hdr->c_ino = FROM_OCTAL (ascii_header.c_ino); file_hdr->c_mode = FROM_OCTAL (ascii_header.c_mode); file_hdr->c_uid = FROM_OCTAL (ascii_header.c_uid); file_hdr->c_gid = FROM_OCTAL (ascii_header.c_gid); file_hdr->c_nlink = FROM_OCTAL (ascii_header.c_nlink); dev = FROM_OCTAL (ascii_header.c_rdev); file_hdr->c_rdev_maj = major (dev); file_hdr->c_rdev_min = minor (dev); file_hdr->c_mtime = FROM_OCTAL (ascii_header.c_mtime); file_hdr->c_namesize = FROM_OCTAL (ascii_header.c_namesize); file_hdr->c_filesize = FROM_OCTAL (ascii_header.c_filesize); /* Read file name from input. */ if (file_hdr->c_name != NULL) free (file_hdr->c_name); file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize + 1); tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize); /* HP/UX cpio creates archives that look just like ordinary archives, but for devices it sets major = 0, minor = 1, and puts the actual major/minor number in the filesize field. See if this is an HP/UX cpio archive, and if so fix it. We have to do this here because process_copy_in() assumes filesize is always 0 for devices. */ switch (file_hdr->c_mode & CP_IFMT) { case CP_IFCHR: case CP_IFBLK: #ifdef CP_IFSOCK case CP_IFSOCK: #endif #ifdef CP_IFIFO case CP_IFIFO: #endif if (file_hdr->c_filesize != 0 && file_hdr->c_rdev_maj == 0 && file_hdr->c_rdev_min == 1) { file_hdr->c_rdev_maj = major (file_hdr->c_filesize); file_hdr->c_rdev_min = minor (file_hdr->c_filesize); file_hdr->c_filesize = 0; } break; default: break; } } /* Fill in FILE_HDR by reading a new-format ASCII format cpio header from file descriptor IN_DES, except for the magic number, which is already filled in. */ void read_in_new_ascii (struct cpio_file_stat *file_hdr, int in_des) { struct new_ascii_header ascii_header; tape_buffered_read (ascii_header.c_ino, in_des, sizeof ascii_header - sizeof ascii_header.c_magic); file_hdr->c_ino = FROM_HEX (ascii_header.c_ino); file_hdr->c_mode = FROM_HEX (ascii_header.c_mode); file_hdr->c_uid = FROM_HEX (ascii_header.c_uid); file_hdr->c_gid = FROM_HEX (ascii_header.c_gid); file_hdr->c_nlink = FROM_HEX (ascii_header.c_nlink); file_hdr->c_mtime = FROM_HEX (ascii_header.c_mtime); file_hdr->c_filesize = FROM_HEX (ascii_header.c_filesize); file_hdr->c_dev_maj = FROM_HEX (ascii_header.c_dev_maj); file_hdr->c_dev_min = FROM_HEX (ascii_header.c_dev_min); file_hdr->c_rdev_maj = FROM_HEX (ascii_header.c_rdev_maj); file_hdr->c_rdev_min = FROM_HEX (ascii_header.c_rdev_min); file_hdr->c_namesize = FROM_HEX (ascii_header.c_namesize); file_hdr->c_chksum = FROM_HEX (ascii_header.c_chksum); /* Read file name from input. */ if (file_hdr->c_name != NULL) free (file_hdr->c_name); file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize); tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize); /* In SVR4 ASCII format, the amount of space allocated for the header is rounded up to the next long-word, so we might need to drop 1-3 bytes. */ tape_skip_padding (in_des, file_hdr->c_namesize + 110); } /* Fill in FILE_HDR by reading a binary format cpio header from file descriptor IN_DES, except for the first 6 bytes (the magic number, device, and inode number), which are already filled in. */ void read_in_binary (struct cpio_file_stat *file_hdr, struct old_cpio_header *short_hdr, int in_des) { file_hdr->c_magic = short_hdr->c_magic; tape_buffered_read (((char *) short_hdr) + 6, in_des, sizeof *short_hdr - 6 /* = 20 */); /* If the magic number is byte swapped, fix the header. */ if (file_hdr->c_magic == swab_short ((unsigned short) 070707)) { static int warned = 0; /* Alert the user that they might have to do byte swapping on the file contents. */ if (warned == 0) { error (0, 0, _("warning: archive header has reverse byte-order")); warned = 1; } swab_array ((char *) short_hdr, 13); } file_hdr->c_dev_maj = major (short_hdr->c_dev); file_hdr->c_dev_min = minor (short_hdr->c_dev); file_hdr->c_ino = short_hdr->c_ino; file_hdr->c_mode = short_hdr->c_mode; file_hdr->c_uid = short_hdr->c_uid; file_hdr->c_gid = short_hdr->c_gid; file_hdr->c_nlink = short_hdr->c_nlink; file_hdr->c_rdev_maj = major (short_hdr->c_rdev); file_hdr->c_rdev_min = minor (short_hdr->c_rdev); file_hdr->c_mtime = (unsigned long) short_hdr->c_mtimes[0] << 16 | short_hdr->c_mtimes[1]; file_hdr->c_namesize = short_hdr->c_namesize; file_hdr->c_filesize = (unsigned long) short_hdr->c_filesizes[0] << 16 | short_hdr->c_filesizes[1]; /* Read file name from input. */ if (file_hdr->c_name != NULL) free (file_hdr->c_name); file_hdr->c_name = (char *) xmalloc (file_hdr->c_namesize); tape_buffered_read (file_hdr->c_name, in_des, (long) file_hdr->c_namesize); /* In binary mode, the amount of space allocated in the header for the filename is `c_namesize' rounded up to the next short-word, so we might need to drop a byte. */ if (file_hdr->c_namesize % 2) tape_toss_input (in_des, 1L); /* HP/UX cpio creates archives that look just like ordinary archives, but for devices it sets major = 0, minor = 1, and puts the actual major/minor number in the filesize field. See if this is an HP/UX cpio archive, and if so fix it. We have to do this here because process_copy_in() assumes filesize is always 0 for devices. */ switch (file_hdr->c_mode & CP_IFMT) { case CP_IFCHR: case CP_IFBLK: #ifdef CP_IFSOCK case CP_IFSOCK: #endif #ifdef CP_IFIFO case CP_IFIFO: #endif if (file_hdr->c_filesize != 0 && file_hdr->c_rdev_maj == 0 && file_hdr->c_rdev_min == 1) { file_hdr->c_rdev_maj = major (file_hdr->c_filesize); file_hdr->c_rdev_min = minor (file_hdr->c_filesize); file_hdr->c_filesize = 0; } break; default: break; } } /* Exchange the bytes of each element of the array of COUNT shorts starting at PTR. */ void swab_array (char *ptr, int count) { char tmp; while (count-- > 0) { tmp = *ptr; *ptr = *(ptr + 1); ++ptr; *ptr = tmp; ++ptr; } } /* Read the collection from standard input and create files in the file system. */ void process_copy_in () { char done = false; /* True if trailer reached. */ FILE *tty_in = NULL; /* Interactive file for rename option. */ FILE *tty_out = NULL; /* Interactive file for rename option. */ FILE *rename_in = NULL; /* Batch file for rename option. */ struct stat file_stat; /* Output file stat record. */ struct cpio_file_stat file_hdr; /* Output header information. */ int in_file_des; /* Input file descriptor. */ char skip_file; /* Flag for use with patterns. */ int i; /* Loop index variable. */ newdir_umask = umask (0); /* Reset umask to preserve modes of created files */ /* Initialize the copy in. */ if (pattern_file_name) { read_pattern_file (); } file_hdr.c_name = NULL; if (rename_batch_file) { rename_in = fopen (rename_batch_file, "r"); if (rename_in == NULL) { error (PAXEXIT_FAILURE, errno, TTY_NAME); } } else if (rename_flag) { /* Open interactive file pair for rename operation. */ tty_in = fopen (TTY_NAME, "r"); if (tty_in == NULL) { error (PAXEXIT_FAILURE, errno, TTY_NAME); } tty_out = fopen (TTY_NAME, "w"); if (tty_out == NULL) { error (PAXEXIT_FAILURE, errno, TTY_NAME); } } /* Get date and time if needed for processing the table option. */ if (table_flag && verbose_flag) { time (¤t_time); } /* Check whether the input file might be a tape. */ in_file_des = archive_des; if (_isrmt (in_file_des)) { input_is_special = 1; input_is_seekable = 0; } else { if (fstat (in_file_des, &file_stat)) error (PAXEXIT_FAILURE, errno, _("standard input is closed")); input_is_special = #ifdef S_ISBLK S_ISBLK (file_stat.st_mode) || #endif S_ISCHR (file_stat.st_mode); input_is_seekable = S_ISREG (file_stat.st_mode); } output_is_seekable = true; change_dir (); /* While there is more input in the collection, process the input. */ while (!done) { swapping_halfwords = swapping_bytes = false; /* Start processing the next file by reading the header. */ read_in_header (&file_hdr, in_file_des); #ifdef DEBUG_CPIO if (debug_flag) { struct cpio_file_stat *h; h = &file_hdr; fprintf (stderr, "magic = 0%o, ino = %ld, mode = 0%o, uid = %d, gid = %d\n", h->c_magic, (long)h->c_ino, h->c_mode, h->c_uid, h->c_gid); fprintf (stderr, "nlink = %d, mtime = %d, filesize = %d, dev_maj = 0x%x\n", h->c_nlink, h->c_mtime, h->c_filesize, h->c_dev_maj); fprintf (stderr, "dev_min = 0x%x, rdev_maj = 0x%x, rdev_min = 0x%x, namesize = %d\n", h->c_dev_min, h->c_rdev_maj, h->c_rdev_min, h->c_namesize); fprintf (stderr, "chksum = %d, name = \"%s\", tar_linkname = \"%s\"\n", h->c_chksum, h->c_name, h->c_tar_linkname ? h->c_tar_linkname : "(null)" ); } #endif if (file_hdr.c_namesize == 0) skip_file = true; else { /* Is this the header for the TRAILER file? */ if (strcmp (CPIO_TRAILER_NAME, file_hdr.c_name) == 0) { done = true; break; } cpio_safer_name_suffix (file_hdr.c_name, false, !no_abs_paths_flag, false); /* Does the file name match one of the given patterns? */ if (num_patterns <= 0) skip_file = false; else { skip_file = copy_matching_files; for (i = 0; i < num_patterns && skip_file == copy_matching_files; i++) { if (fnmatch (save_patterns[i], file_hdr.c_name, 0) == 0) skip_file = !copy_matching_files; } } } if (skip_file) { /* If we're skipping a file with links, there might be other links that we didn't skip, and this file might have the data for the links. If it does, we'll copy in the data to the links, but not to this file. */ if (file_hdr.c_nlink > 1 && (archive_format == arf_newascii || archive_format == arf_crcascii) ) { if (create_defered_links_to_skipped(&file_hdr, in_file_des) < 0) { tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); } } else { tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); } } else if (table_flag) { list_file (&file_hdr, in_file_des); } else if (append_flag) { tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); } else if (only_verify_crc_flag) { #ifdef CP_IFLNK if ((file_hdr.c_mode & CP_IFMT) == CP_IFLNK) { if (archive_format != arf_tar && archive_format != arf_ustar) { tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); continue; } } #endif crc = 0; tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); if (crc != file_hdr.c_chksum) { error (0, 0, _("%s: checksum error (0x%x, should be 0x%x)"), file_hdr.c_name, crc, file_hdr.c_chksum); } /* Debian hack: -v and -V now work with --only-verify-crc. (99/11/10) -BEM */ if (verbose_flag) { fprintf (stderr, "%s\n", file_hdr.c_name); } if (dot_flag) { fputc ('.', stderr); } } else { /* Copy the input file into the directory structure. */ /* Do we need to rename the file? */ if (rename_flag || rename_batch_file) { if (query_rename(&file_hdr, tty_in, tty_out, rename_in) < 0) { tape_toss_input (in_file_des, file_hdr.c_filesize); tape_skip_padding (in_file_des, file_hdr.c_filesize); continue; } } copyin_file(&file_hdr, in_file_des); if (verbose_flag) fprintf (stderr, "%s\n", file_hdr.c_name); if (dot_flag) fputc ('.', stderr); } } if (dot_flag) fputc ('\n', stderr); apply_delayed_set_stat (); if (append_flag) return; if (archive_format == arf_newascii || archive_format == arf_crcascii) { create_final_defers (); } if (!quiet_flag) { size_t blocks; blocks = (input_bytes + io_block_size - 1) / io_block_size; fprintf (stderr, ngettext ("%lu block\n", "%lu blocks\n", (unsigned long) blocks), (unsigned long) blocks); } }