/* copyin.c - extract or list a cpio archive Copyright (C) 1990, 1991, 1992 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 2, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include "filetypes.h" #include "system.h" #include "cpiohdr.h" #include "dstring.h" #include "extern.h" #include "defer.h" #include "rmt.h" #ifndef FNM_PATHNAME #include #endif #ifndef HAVE_LCHOWN #define lchown chown #endif static void read_pattern_file (); static void skip_padding (); static void defer_copyin (); static void create_defered_links (); static void create_final_defers (); /* 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 (file_hdr, in_des) struct new_cpio_header *file_hdr; int in_des; { 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 = peek_in_buf (tmpbuf, in_des, 512); if (peeked_bytes < 6) error (1, 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 { copy_in_buf ((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) error (0, 0, "warning: skipped %ld bytes of junk", bytes_skipped); read_in_tar_header (file_hdr, in_des); return; } file_hdr->c_tar_linkname = NULL; copy_in_buf ((char *) file_hdr, in_des, 6L); while (1) { if (append_flag) last_header_start = input_bytes - io_block_size + (in_buff - input_buffer) - 6; if (archive_format == arf_newascii && !strncmp ((char *) file_hdr, "070701", 6)) { if (bytes_skipped > 0) error (0, 0, "warning: skipped %ld bytes of junk", bytes_skipped); read_in_new_ascii (file_hdr, in_des); break; } if (archive_format == arf_crcascii && !strncmp ((char *) file_hdr, "070702", 6)) { if (bytes_skipped > 0) error (0, 0, "warning: skipped %ld bytes of junk", bytes_skipped); read_in_new_ascii (file_hdr, in_des); break; } if ( (archive_format == arf_oldascii || archive_format == arf_hpoldascii) && !strncmp ((char *) file_hdr, "070707", 6)) { if (bytes_skipped > 0) error (0, 0, "warning: skipped %ld bytes of junk", bytes_skipped); read_in_old_ascii (file_hdr, in_des); break; } if ( (archive_format == arf_binary || archive_format == arf_hpbinary) && (file_hdr->c_magic == 070707 || file_hdr->c_magic == swab_short ((unsigned short) 070707))) { /* Having to skip 1 byte because of word alignment is normal. */ if (bytes_skipped > 0) error (0, 0, "warning: skipped %ld bytes of junk", bytes_skipped); read_in_binary (file_hdr, in_des); break; } bytes_skipped++; bcopy ((char *) file_hdr + 1, (char *) file_hdr, 5); copy_in_buf ((char *) file_hdr + 5, 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 (file_hdr, in_des) struct new_cpio_header *file_hdr; int in_des; { char ascii_header[78]; unsigned long dev; unsigned long rdev; copy_in_buf (ascii_header, in_des, 70L); ascii_header[70] = '\0'; sscanf (ascii_header, "%6lo%6lo%6lo%6lo%6lo%6lo%6lo%11lo%6lo%11lo", &dev, &file_hdr->c_ino, &file_hdr->c_mode, &file_hdr->c_uid, &file_hdr->c_gid, &file_hdr->c_nlink, &rdev, &file_hdr->c_mtime, &file_hdr->c_namesize, &file_hdr->c_filesize); file_hdr->c_dev_maj = major (dev); file_hdr->c_dev_min = minor (dev); file_hdr->c_rdev_maj = major (rdev); file_hdr->c_rdev_min = minor (rdev); /* 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); copy_in_buf (file_hdr->c_name, in_des, (long) file_hdr->c_namesize); #ifndef __MSDOS__ /* 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; } #endif /* __MSDOS__ */ } /* 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 (file_hdr, in_des) struct new_cpio_header *file_hdr; int in_des; { char ascii_header[112]; copy_in_buf (ascii_header, in_des, 104L); ascii_header[104] = '\0'; sscanf (ascii_header, "%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx%8lx", &file_hdr->c_ino, &file_hdr->c_mode, &file_hdr->c_uid, &file_hdr->c_gid, &file_hdr->c_nlink, &file_hdr->c_mtime, &file_hdr->c_filesize, &file_hdr->c_dev_maj, &file_hdr->c_dev_min, &file_hdr->c_rdev_maj, &file_hdr->c_rdev_min, &file_hdr->c_namesize, &file_hdr->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); copy_in_buf (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. */ 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 (file_hdr, in_des) struct new_cpio_header *file_hdr; int in_des; { struct old_cpio_header short_hdr; /* Copy the data into the short header, then later transfer it into the argument long header. */ short_hdr.c_dev = ((struct old_cpio_header *) file_hdr)->c_dev; short_hdr.c_ino = ((struct old_cpio_header *) file_hdr)->c_ino; copy_in_buf (((char *) &short_hdr) + 6, in_des, 20L); /* 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); copy_in_buf (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) toss_input (in_des, 1L); #ifndef __MSDOS__ /* 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; } #endif /* __MSDOS__ */ } /* Exchange the bytes of each element of the array of COUNT shorts starting at PTR. */ void swab_array (ptr, count) char *ptr; int count; { char tmp; while (count-- > 0) { tmp = *ptr; *ptr = *(ptr + 1); ++ptr; *ptr = tmp; ++ptr; } } /* Current time for verbose table. */ static time_t current_time; /* Read the collection from standard input and create files in the file system. */ void process_copy_in () { char done = FALSE; /* True if trailer reached. */ int res; /* Result of various function calls. */ dynamic_string new_name; /* New file name for rename option. */ FILE *tty_in; /* Interactive file for rename option. */ FILE *tty_out; /* Interactive file for rename option. */ char *str_res; /* Result for string function. */ struct utimbuf times; /* For setting file times. */ struct stat file_stat; /* Output file stat record. */ struct new_cpio_header file_hdr; /* Output header information. */ int out_file_des; /* Output file descriptor. */ int in_file_des; /* Input file descriptor. */ char skip_file; /* Flag for use with patterns. */ int existing_dir; /* True if file is a dir & already exists. */ int i; /* Loop index variable. */ char *link_name = NULL; /* Name of hard and symbolic links. */ #ifdef HPUX_CDF int cdf_flag; /* True if file is a CDF. */ int cdf_char; /* Index of `+' char indicating a CDF. */ #endif /* Initialize the copy in. */ if (pattern_file_name) read_pattern_file (); file_hdr.c_name = NULL; ds_init (&new_name, 128); /* Initialize this in case it has members we don't know to set. */ bzero (×, sizeof (struct utimbuf)); /* Open interactive file pair for rename operation. */ if (rename_flag) { tty_in = fopen (CONSOLE, "r"); if (tty_in == NULL) error (2, errno, CONSOLE); tty_out = fopen (CONSOLE, "w"); if (tty_out == NULL) error (2, errno, CONSOLE); } /* Get date and time if needed for processing the table option. */ if (table_flag && verbose_flag) time (¤t_time); #ifdef __MSDOS__ setmode (archive_des, O_BINARY); #endif /* 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 (1, 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; /* While there is more input in the collection, process the input. */ while (!done) { link_name = NULL; 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 new_cpio_header *h; h = &file_hdr; fprintf (stderr, "magic = 0%o, ino = %d, mode = 0%o, uid = %d, gid = %d\n", h->c_magic, 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 /* Is this the header for the TRAILER file? */ if (strcmp ("TRAILER!!!", file_hdr.c_name) == 0) { done = TRUE; break; } /* 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) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); } else if (table_flag) { if (verbose_flag) { #ifdef CP_IFLNK if ((file_hdr.c_mode & CP_IFMT) == CP_IFLNK) { if (archive_format != arf_tar && archive_format != arf_ustar) { link_name = (char *) xmalloc ((unsigned int) file_hdr.c_filesize + 1); link_name[file_hdr.c_filesize] = '\0'; copy_in_buf (link_name, in_file_des, file_hdr.c_filesize); long_format (&file_hdr, link_name); free (link_name); skip_padding (in_file_des, file_hdr.c_filesize); continue; } else { long_format (&file_hdr, file_hdr.c_tar_linkname); continue; } } else #endif long_format (&file_hdr, (char *) 0); } else printf ("%s\n", file_hdr.c_name); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); } else if (append_flag) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); } else { /* Copy the input file into the directory structure. */ /* Do we need to rename the file? */ if (rename_flag) { fprintf (tty_out, "rename %s -> ", file_hdr.c_name); fflush (tty_out); str_res = ds_fgets (tty_in, &new_name); if (str_res == NULL || str_res[0] == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); continue; } else file_hdr.c_name = xstrdup (new_name.ds_string); } /* See if the file already exists. */ 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; } 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); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); continue; /* 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); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); continue; /* Go to the next file. */ } } /* Do the real copy or link. */ switch (file_hdr.c_mode & CP_IFMT) { case CP_IFREG: #ifndef __MSDOS__ /* 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); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } /* 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). */ link_res = link_to_maj_min_ino (file_hdr.c_name, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } } else if (file_hdr.c_nlink > 1 && archive_format != arf_tar && archive_format != arf_ustar) { int link_res; link_res = link_to_maj_min_ino (file_hdr.c_name, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } } 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); } break; } #endif /* If not linked, copy the contents of the file. */ if (link_name == NULL) { 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) { error (0, errno, "%s", file_hdr.c_name); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); continue; } 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 (in_file_des, out_file_des, file_hdr.c_filesize); empty_output_buffer (out_file_des); if (close (out_file_des) < 0) error (0, errno, "%s", 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); } /* File is now copied; set attributes. */ if (!no_chown_flag) if ((chown (file_hdr.c_name, set_owner_flag ? set_owner : file_hdr.c_uid, set_group_flag ? set_group : file_hdr.c_gid) < 0) && errno != EPERM) error (0, errno, "%s", file_hdr.c_name); /* chown may have turned off some permissions we wanted. */ if (chmod (file_hdr.c_name, (int) file_hdr.c_mode) < 0) error (0, errno, "%s", file_hdr.c_name); if (retain_time_flag) { times.actime = times.modtime = file_hdr.c_mtime; if (utime (file_hdr.c_name, ×) < 0) error (0, errno, "%s", file_hdr.c_name); } 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); } } break; case CP_IFDIR: /* Strip any trailing `/'s off the filename; tar puts them on. We might as well do it here in case anybody else does too, since they cause strange things to happen. */ strip_trailing_slashes (file_hdr.c_name); /* Ignore the current directory. It must already exist, and we don't want to change its permission, ownership or time. */ if (file_hdr.c_name[0] == '.' && file_hdr.c_name[1] == '\0') break; #ifdef HPUX_CDF cdf_flag = 0; #endif if (!existing_dir) { #ifdef HPUX_CDF /* If the directory name ends in a + and is SUID, then it is a CDF. Strip the trailing + from the name before creating it. */ cdf_char = strlen (file_hdr.c_name) - 1; if ( (cdf_char > 0) && (file_hdr.c_mode & 04000) && (file_hdr.c_name [cdf_char] == '+') ) { file_hdr.c_name [cdf_char] = '\0'; cdf_flag = 1; } #endif res = mkdir (file_hdr.c_name, file_hdr.c_mode); } else res = 0; if (res < 0 && create_dir_flag) { create_all_directories (file_hdr.c_name); res = mkdir (file_hdr.c_name, file_hdr.c_mode); } if (res < 0) { error (0, errno, "%s", file_hdr.c_name); continue; } if (!no_chown_flag) if ((chown (file_hdr.c_name, set_owner_flag ? set_owner : file_hdr.c_uid, set_group_flag ? set_group : file_hdr.c_gid) < 0) && errno != EPERM) error (0, errno, "%s", file_hdr.c_name); /* chown may have turned off some permissions we wanted. */ if (chmod (file_hdr.c_name, (int) file_hdr.c_mode) < 0) error (0, errno, "%s", file_hdr.c_name); #ifdef HPUX_CDF if (cdf_flag) /* Once we "hide" the directory with the chmod(), we have to refer to it using name+ instead of name. */ file_hdr.c_name [cdf_char] = '+'; #endif if (retain_time_flag) { times.actime = times.modtime = file_hdr.c_mtime; if (utime (file_hdr.c_name, ×) < 0) error (0, errno, "%s", file_hdr.c_name); } break; #ifndef __MSDOS__ case CP_IFCHR: case CP_IFBLK: #ifdef CP_IFSOCK case CP_IFSOCK: #endif #ifdef CP_IFIFO case CP_IFIFO: #endif if (file_hdr.c_nlink > 1 && archive_format != arf_tar && archive_format != arf_ustar) { int link_res; link_res = link_to_maj_min_ino (file_hdr.c_name, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) break; } 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 break, rather than possibly creating a bogus device file. */ } break; } 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) { error (0, errno, "%s", file_hdr.c_name); continue; } if (!no_chown_flag) if ((chown (file_hdr.c_name, set_owner_flag ? set_owner : file_hdr.c_uid, set_group_flag ? set_group : file_hdr.c_gid) < 0) && errno != EPERM) error (0, errno, "%s", file_hdr.c_name); /* chown may have turned off some permissions we wanted. */ if (chmod (file_hdr.c_name, file_hdr.c_mode) < 0) error (0, errno, "%s", file_hdr.c_name); if (retain_time_flag) { times.actime = times.modtime = file_hdr.c_mtime; if (utime (file_hdr.c_name, ×) < 0) error (0, errno, "%s", file_hdr.c_name); } break; #endif #ifdef CP_IFLNK case CP_IFLNK: { /* Can the current symlink 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) { /* See CP_IFREG case for how links are handled */ defer_copyin (&file_hdr); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } /* 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). */ link_res = link_to_maj_min_ino (file_hdr.c_name, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } } else if (file_hdr.c_nlink > 1 && archive_format != arf_tar && archive_format != arf_ustar) { int link_res; link_res = link_to_maj_min_ino (file_hdr.c_name, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } } 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_maj_min_ino (file_hdr.c_tar_linkname, file_hdr.c_dev_maj, file_hdr.c_dev_maj, file_hdr.c_ino); if (link_res == 0) { toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); break; } } /* If not linked, copy the contents of the file. */ if (link_name == NULL) { if (archive_format != arf_tar && archive_format != arf_ustar) { link_name = (char *) xmalloc ((unsigned int) file_hdr.c_filesize + 1); link_name[file_hdr.c_filesize] = '\0'; copy_in_buf (link_name, in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); } else { 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", file_hdr.c_name); free (link_name); link_name = NULL; continue; } if (!no_chown_flag) if ((lchown (file_hdr.c_name, set_owner_flag ? set_owner : file_hdr.c_uid, set_group_flag ? set_group : file_hdr.c_gid) < 0) && errno != EPERM) error (0, errno, "%s", file_hdr.c_name); free (link_name); link_name = NULL; } } break; #endif default: error (0, 0, "%s: unknown file type", file_hdr.c_name); toss_input (in_file_des, file_hdr.c_filesize); skip_padding (in_file_des, file_hdr.c_filesize); } if (verbose_flag) fprintf (stderr, "%s\n", file_hdr.c_name); if (dot_flag) fputc ('.', stderr); } } if (dot_flag) fputc ('\n', stderr); if (append_flag) return; if (archive_format == arf_newascii || archive_format == arf_crcascii) create_final_defers (); res = (input_bytes + io_block_size - 1) / io_block_size; if (res == 1) fprintf (stderr, "1 block\n"); else fprintf (stderr, "%d blocks\n", res); } /* 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 (file_hdr, link_name) struct new_cpio_header *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 %3u ", mbuf, file_hdr->c_nlink); #ifndef __MSDOS__ if (numeric_uid) #endif printf ("%-8u %-8u ", (unsigned int) file_hdr->c_uid, (unsigned int) file_hdr->c_gid); #ifndef __MSDOS__ 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 ("%3u, %3u ", file_hdr->c_rdev_maj, file_hdr->c_rdev_min); else #endif printf ("%8lu ", 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 (p) register char *p; { register unsigned char c; while (c = *p++) { switch (c) { #ifndef __MSDOS__ case '\\': printf ("\\\\"); break; #endif 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 && #ifdef __MSDOS__ c < 0377 && c != 0177 #else c < 0177 #endif ) 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) error (1, errno, "%s", 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) error (1, errno, "%s", 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; } /* 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 skip_padding (in_file_des, offset) int in_file_des; int offset; { int 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) toss_input (in_file_des, pad); } /* 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 (file_hdr) struct new_cpio_header *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 (file_hdr) struct new_cpio_header *file_hdr; { struct deferment *d; struct deferment *d_prev; int 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; } } } /* 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; struct deferment *d_prev; struct new_cpio_header *h; int link_res; int out_file_des; struct utimbuf times; /* For setting file times. */ /* Initialize this in case it has members we don't know to set. */ bzero (×, sizeof (struct utimbuf)); for (d = deferments; d != NULL; d = d->next) { d = deferments; link_res = link_to_maj_min_ino (d->header.c_name, d->header.c_dev_maj, d->header.c_dev_maj, 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) { error (0, errno, "%s", d->header.c_name); continue; } if (close (out_file_des) < 0) error (0, errno, "%s", d->header.c_name); /* File is now copied; set attributes. */ if (!no_chown_flag) if ((chown (d->header.c_name, set_owner_flag ? set_owner : d->header.c_uid, set_group_flag ? set_group : d->header.c_gid) < 0) && errno != EPERM) error (0, errno, "%s", d->header.c_name); /* chown may have turned off some permissions we wanted. */ if (chmod (d->header.c_name, (int) d->header.c_mode) < 0) error (0, errno, "%s", d->header.c_name); if (retain_time_flag) { times.actime = times.modtime = d->header.c_mtime; if (utime (d->header.c_name, ×) < 0) error (0, errno, "%s", d->header.c_name); } } }