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archives.h(3head)
archives.h(3HEAD) Headers archives.h(3HEAD)
NAME
archives.h, archives - device header
DESCRIPTION
/* Magic numbers */
#define CMN_ASC 0x070701 /* Cpio Magic Number for -c header */
#define CMN_BIN 070707 /* Cpio Magic Number for Binary header */
#define CMN_BBS 0143561 /* Cpio Magic Number for Byte-Swap header */
#define CMN_CRC 0x070702 /* Cpio Magic Number for CRC header */
#define CMS_ASC "070701" /* Cpio Magic String for -c header */
#define CMS_CHR "070707" /* Cpio Magic String for odc header */
#define CMS_CRC "070702" /* Cpio Magic String for CRC header */
#define CMS_LEN 6 /* Cpio Magic String length */
/* Various header and field lengths */
#define CHRSZ 76 /* -H odc size minus filename field */
#define ASCSZ 110 /* -c and CRC hdr size minus filename field */
#define TARSZ 512 /* TAR hdr size */
#define HNAMLEN 256 /* maximum filename length for binary and
odc headers */
#define EXPNLEN 1024 /* maximum filename length for -c and
CRC headers */
#define HTIMLEN 2 /* length of modification time field */
#define HSIZLEN 2 /* length of file size field */
/* cpio binary header definition */
struct hdr_cpio {
short h_magic, /* magic number field */
h_dev; /* file system of file */
ushort_t h_ino, /* inode of file */
h_mode, /* modes of file */
h_uid, /* uid of file */
h_gid; /* gid of file */
short h_nlink, /* number of links to file */
h_rdev, /* maj/min numbers for special files */
h_mtime[HTIMLEN], /* modification time of file */
h_namesize, /* length of filename */
h_filesize[HSIZLEN]; /* size of file */
char h_name[HNAMLEN]; /* filename */
} ;
/* cpio -H odc header format */
struct c_hdr {
char c_magic[CMS_LEN],
c_dev[6],
c_ino[6],
c_mode[6],
c_uid[6],
c_gid[6],
c_nlink[6],
c_rdev[6],
c_mtime[11],
c_namesz[6],
c_filesz[11],
c_name[HNAMLEN];
} ;
/* -c and CRC header format */
struct Exp_cpio_hdr {
char E_magic[CMS_LEN],
E_ino[8],
E_mode[8],
E_uid[8],
E_gid[8],
E_nlink[8],
E_mtime[8],
E_filesize[8],
E_maj[8],
E_min[8],
E_rmaj[8],
E_rmin[8],
E_namesize[8],
E_chksum[8],
E_name[EXPNLEN];
} ;
/* Tar header structure and format */
#define TBLOCK 512 /* length of tar header and data blocks */
#define TNAMLEN 100 /* maximum length for tar file names */
#define TMODLEN 8 /* length of mode field */
#define TUIDLEN 8 /* length of uid field */
#define TGIDLEN 8 /* length of gid field */
#define TSIZLEN 12 /* length of size field */
#define TTIMLEN 12 /* length of modification time field */
#define TCRCLEN 8 /* length of header checksum field */
/* tar header definition */
union tblock {
char dummy[TBLOCK];
struct header {
char t_name[TNAMLEN]; /* name of file */
char t_mode[TMODLEN]; /* mode of file */
char t_uid[TUIDLEN]; /* uid of file */
char t_gid[TGIDLEN]; /* gid of file */
char t_size[TSIZLEN]; /* size of file in bytes */
char t_mtime[TTIMLEN]; /* modification time of file */
char t_chksum[TCRCLEN]; /* checksum of header */
char t_typeflag; /* flag to indicate type of file */
char t_linkname[TNAMLEN]; /* file this file is linked with */
char t_magic[6]; /* magic string always "ustar" */
char t_version[2]; /* version strings always "00" */
char t_uname[32]; /* owner of file in ASCII */
char t_gname[32]; /* group of file in ASCII */
char t_devmajor[8]; /* major number for special files */
char t_devminor[8]; /* minor number for special files */
char t_prefix[155]; /* pathname prefix */
} tbuf;
}
/* volcopy tape label format and structure */
#define VMAGLEN 8
#define VVOLLEN 6
#define VFILLEN 464
struct volcopy_label {
char v_magic[VMAGLEN],
v_volume[VVOLLEN],
v_reels,
v_reel;
long v_time,
v_length,
v_dens,
v_reelblks, /* u370 added field */
v_blksize, /* u370 added field */
v_nblocks; /* u370 added field */
char v_fill[VFILLEN];
long v_offset; /* used with -e and -reel options */
int v_type; /* does tape have nblocks field? */
} ;
/*
* Define archive formats for extended attributes.
*
* Extended attributes are stored in two pieces.
* 1. An attribute header which has information about
* what file the attribute is for and what the attribute
* is named.
* 2. The attribute record itself. Stored as a normal file type
* of entry.
* Both the header and attribute record have special modes/typeflags
* associated with them.
*
* The names of the header in the archive look like:
* /dev/null/attr.hdr
*
* The name of the attribute looks like:
* /dev/null/attr.
*
* This is done so that an archiver that doesn't understand these formats
* can just dispose of the attribute records unless the user chooses to
* rename them via cpio -r or pax -i
*
* The format is composed of a fixed size header followed
* by a variable sized xattr_buf. If the attribute is a hard link
* to another attribute, then another xattr_buf section is included
* for the link.
*
* The xattr_buf is used to define the necessary "pathing" steps
* to get to the extended attribute. This is necessary to support
* a fully recursive attribute model where an attribute may itself
* have an attribute.
*
* The basic layout looks like this.
*
* --------------------------------
* | |
* | xattr_hdr |
* | |
* --------------------------------
* --------------------------------
* | |
* | xattr_buf |
* | |
* --------------------------------
* --------------------------------
* | |
* | (optional link info) |
* | |
* --------------------------------
* --------------------------------
* | |
* | attribute itself |
* | stored as normal tar |
* | or cpio data with |
* | special mode or |
* | typeflag |
* | |
* --------------------------------
*
*/
#define XATTR_ARCH_VERS "1.0"
/*
* extended attribute fixed header
*
* h_version format version.
* h_size size of header + variable sized data sections.
* h_component_len Length of entire pathing section.
* h_link_component_len Length of link component section. Again same
* definition as h_component_len.
*/
struct xattr_hdr {
char h_version[7];
char h_size[10];
char h_component_len[10]; /* total length of path component */
char h_link_component_len[10];
};
/*
* The name is encoded like this:
* filepathNULattrpathNUL[attrpathNULL]...
*/
struct xattr_buf {
char h_namesz[7]; /* length of h_names */
char h_typeflag; /* actual typeflag of file being archived */
char h_names[1]; /* filepathNULattrpathNUL... */
};
/*
* Special values for tar archives
*/
/*
* typeflag for tar archives.
*/
/*
* Attribute hdr and attribute files have the following typeflag
*/
#define _XATTR_HDRTYPE 'E'
/*
* For cpio archives the header and attribute have
* _XATTR_CPIO_MODE ORED into the mode field in both
* character and binary versions of the archive format
*/
#define _XATTR_CPIO_MODE 0xB000
Oracle Solaris 11.4 1 Aug 2011 archives.h(3HEAD)