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diff --git a/libarchive/libarchive-2.8.0/doc/man/cpio.5 b/libarchive/libarchive-2.8.0/doc/man/cpio.5 deleted file mode 100644 index 922df01..0000000 --- a/libarchive/libarchive-2.8.0/doc/man/cpio.5 +++ /dev/null @@ -1,329 +0,0 @@ -.TH CPIO 5 "October 5, 2007" "" -.SH NAME -.ad l -\fB\%cpio\fP -\- format of cpio archive files -.SH DESCRIPTION -.ad l -The -\fB\%cpio\fP -archive format collects any number of files, directories, and other -file system objects (symbolic links, device nodes, etc.) into a single -stream of bytes. -.SS General Format -Each file system object in a -\fB\%cpio\fP -archive comprises a header record with basic numeric metadata -followed by the full pathname of the entry and the file data. -The header record stores a series of integer values that generally -follow the fields in -\fIstruct\fP stat. -(See -\fBstat\fP(2) -for details.) -The variants differ primarily in how they store those integers -(binary, octal, or hexadecimal). -The header is followed by the pathname of the -entry (the length of the pathname is stored in the header) -and any file data. -The end of the archive is indicated by a special record with -the pathname -``TRAILER!!!''. -.SS PWB format -XXX Any documentation of the original PWB/UNIX 1.0 format? XXX -.SS Old Binary Format -The old binary -\fB\%cpio\fP -format stores numbers as 2-byte and 4-byte binary values. -Each entry begins with a header in the following format: -.RS 4 -.nf -struct header_old_cpio { - unsigned short c_magic; - unsigned short c_dev; - unsigned short c_ino; - unsigned short c_mode; - unsigned short c_uid; - unsigned short c_gid; - unsigned short c_nlink; - unsigned short c_rdev; - unsigned short c_mtime[2]; - unsigned short c_namesize; - unsigned short c_filesize[2]; -}; -.RE -.PP -The -\fIunsigned\fP short -fields here are 16-bit integer values; the -\fIunsigned\fP int -fields are 32-bit integer values. -The fields are as follows -.RS 5 -.TP -\fImagic\fP -The integer value octal 070707. -This value can be used to determine whether this archive is -written with little-endian or big-endian integers. -.TP -\fIdev\fP, \fIino\fP -The device and inode numbers from the disk. -These are used by programs that read -\fB\%cpio\fP -archives to determine when two entries refer to the same file. -Programs that synthesize -\fB\%cpio\fP -archives should be careful to set these to distinct values for each entry. -.TP -\fImode\fP -The mode specifies both the regular permissions and the file type. -It consists of several bit fields as follows: -.RS 5 -.TP -0170000 -This masks the file type bits. -.TP -0140000 -File type value for sockets. -.TP -0120000 -File type value for symbolic links. -For symbolic links, the link body is stored as file data. -.TP -0100000 -File type value for regular files. -.TP -0060000 -File type value for block special devices. -.TP -0040000 -File type value for directories. -.TP -0020000 -File type value for character special devices. -.TP -0010000 -File type value for named pipes or FIFOs. -.TP -0004000 -SUID bit. -.TP -0002000 -SGID bit. -.TP -0001000 -Sticky bit. -On some systems, this modifies the behavior of executables and/or directories. -.TP -0000777 -The lower 9 bits specify read/write/execute permissions -for world, group, and user following standard POSIX conventions. -.RE -.TP -\fIuid\fP, \fIgid\fP -The numeric user id and group id of the owner. -.TP -\fInlink\fP -The number of links to this file. -Directories always have a value of at least two here. -Note that hardlinked files include file data with every copy in the archive. -.TP -\fIrdev\fP -For block special and character special entries, -this field contains the associated device number. -For all other entry types, it should be set to zero by writers -and ignored by readers. -.TP -\fImtime\fP -Modification time of the file, indicated as the number -of seconds since the start of the epoch, -00:00:00 UTC January 1, 1970. -The four-byte integer is stored with the most-significant 16 bits first -followed by the least-significant 16 bits. -Each of the two 16 bit values are stored in machine-native byte order. -.TP -\fInamesize\fP -The number of bytes in the pathname that follows the header. -This count includes the trailing NUL byte. -.TP -\fIfilesize\fP -The size of the file. -Note that this archive format is limited to -four gigabyte file sizes. -See -\fImtime\fP -above for a description of the storage of four-byte integers. -.RE -.PP -The pathname immediately follows the fixed header. -If the -\fBnamesize\fP -is odd, an additional NUL byte is added after the pathname. -The file data is then appended, padded with NUL -bytes to an even length. -.PP -Hardlinked files are not given special treatment; -the full file contents are included with each copy of the -file. -.SS Portable ASCII Format -Version 2 of the Single UNIX Specification (``SUSv2'') -standardized an ASCII variant that is portable across all -platforms. -It is commonly known as the -``old character'' -format or as the -``odc'' -format. -It stores the same numeric fields as the old binary format, but -represents them as 6-character or 11-character octal values. -.RS 4 -.nf -struct cpio_odc_header { - char c_magic[6]; - char c_dev[6]; - char c_ino[6]; - char c_mode[6]; - char c_uid[6]; - char c_gid[6]; - char c_nlink[6]; - char c_rdev[6]; - char c_mtime[11]; - char c_namesize[6]; - char c_filesize[11]; -}; -.RE -.PP -The fields are identical to those in the old binary format. -The name and file body follow the fixed header. -Unlike the old binary format, there is no additional padding -after the pathname or file contents. -If the files being archived are themselves entirely ASCII, then -the resulting archive will be entirely ASCII, except for the -NUL byte that terminates the name field. -.SS New ASCII Format -The "new" ASCII format uses 8-byte hexadecimal fields for -all numbers and separates device numbers into separate fields -for major and minor numbers. -.RS 4 -.nf -struct cpio_newc_header { - char c_magic[6]; - char c_ino[8]; - char c_mode[8]; - char c_uid[8]; - char c_gid[8]; - char c_nlink[8]; - char c_mtime[8]; - char c_filesize[8]; - char c_devmajor[8]; - char c_devminor[8]; - char c_rdevmajor[8]; - char c_rdevminor[8]; - char c_namesize[8]; - char c_check[8]; -}; -.RE -.PP -Except as specified below, the fields here match those specified -for the old binary format above. -.RS 5 -.TP -\fImagic\fP -The string -``070701''. -.TP -\fIcheck\fP -This field is always set to zero by writers and ignored by readers. -See the next section for more details. -.RE -.PP -The pathname is followed by NUL bytes so that the total size -of the fixed header plus pathname is a multiple of four. -Likewise, the file data is padded to a multiple of four bytes. -Note that this format supports only 4 gigabyte files (unlike the -older ASCII format, which supports 8 gigabyte files). -.PP -In this format, hardlinked files are handled by setting the -filesize to zero for each entry except the last one that -appears in the archive. -.SS New CRC Format -The CRC format is identical to the new ASCII format described -in the previous section except that the magic field is set -to -``070702'' -and the -\fIcheck\fP -field is set to the sum of all bytes in the file data. -This sum is computed treating all bytes as unsigned values -and using unsigned arithmetic. -Only the least-significant 32 bits of the sum are stored. -.SS HP variants -The -\fB\%cpio\fP -implementation distributed with HPUX used XXXX but stored -device numbers differently XXX. -.SS Other Extensions and Variants -Sun Solaris uses additional file types to store extended file -data, including ACLs and extended attributes, as special -entries in cpio archives. -.PP -XXX Others? XXX -.SH BUGS -.ad l -The -``CRC'' -format is mis-named, as it uses a simple checksum and -not a cyclic redundancy check. -.PP -The old binary format is limited to 16 bits for user id, -group id, device, and inode numbers. -It is limited to 4 gigabyte file sizes. -.PP -The old ASCII format is limited to 18 bits for -the user id, group id, device, and inode numbers. -It is limited to 8 gigabyte file sizes. -.PP -The new ASCII format is limited to 4 gigabyte file sizes. -.PP -None of the cpio formats store user or group names, -which are essential when moving files between systems with -dissimilar user or group numbering. -.PP -Especially when writing older cpio variants, it may be necessary -to map actual device/inode values to synthesized values that -fit the available fields. -With very large filesystems, this may be necessary even for -the newer formats. -.SH SEE ALSO -.ad l -\fBcpio\fP(1), -\fBtar\fP(5) -.SH STANDARDS -.ad l -The -\fB\%cpio\fP -utility is no longer a part of POSIX or the Single Unix Standard. -It last appeared in -Version 2 of the Single UNIX Specification (``SUSv2''). -It has been supplanted in subsequent standards by -\fBpax\fP(1). -The portable ASCII format is currently part of the specification for the -\fBpax\fP(1) -utility. -.SH HISTORY -.ad l -The original cpio utility was written by Dick Haight -while working in AT&T's Unix Support Group. -It appeared in 1977 as part of PWB/UNIX 1.0, the -``Programmer's Work Bench'' -derived from -At v6 -that was used internally at AT&T. -Both the old binary and old character formats were in use -by 1980, according to the System III source released -by SCO under their -``Ancient Unix'' -license. -The character format was adopted as part of -IEEE Std 1003.1-1988 (``POSIX.1''). -XXX when did "newc" appear? Who invented it? When did HP come out with their variant? When did Sun introduce ACLs and extended attributes? XXX |