rpm/lib/cpio.h

#ifndef H_CPIO
#define H_CPIO

/** \ingroup payload
 * \file lib/cpio.h
 *  Structures used to handle cpio payloads within rpm packages.
 *
 *  @warning Rpm's cpio implementation may be different than standard cpio.
 *  The implementation is pretty close, but it has some behaviors which are
 *  more to RPM's liking. I tried to document the differing behavior in cpio.c,
 *  but I may have missed some (ewt).
 *
 */

#include <zlib.h>
#include <sys/types.h>

#include <rpmio_internal.h>

/** \ingroup payload
 * @note CPIO_CHECK_ERRNO bit is set only if errno is valid.
 */
#define CPIOERR_CHECK_ERRNO	0x00008000

/** \ingroup payload
 */
enum cpioErrorReturns {
	CPIOERR_BAD_MAGIC	= (2			),
	CPIOERR_BAD_HEADER	= (3			),
	CPIOERR_OPEN_FAILED	= (4    | CPIOERR_CHECK_ERRNO),
	CPIOERR_CHMOD_FAILED	= (5    | CPIOERR_CHECK_ERRNO),
	CPIOERR_CHOWN_FAILED	= (6    | CPIOERR_CHECK_ERRNO),
	CPIOERR_WRITE_FAILED	= (7    | CPIOERR_CHECK_ERRNO),
	CPIOERR_UTIME_FAILED	= (8    | CPIOERR_CHECK_ERRNO),
	CPIOERR_UNLINK_FAILED	= (9    | CPIOERR_CHECK_ERRNO),

	CPIOERR_RENAME_FAILED	= (10   | CPIOERR_CHECK_ERRNO),
	CPIOERR_SYMLINK_FAILED	= (11   | CPIOERR_CHECK_ERRNO),
	CPIOERR_STAT_FAILED	= (12   | CPIOERR_CHECK_ERRNO),
	CPIOERR_LSTAT_FAILED	= (13   | CPIOERR_CHECK_ERRNO),
	CPIOERR_MKDIR_FAILED	= (14   | CPIOERR_CHECK_ERRNO),
	CPIOERR_RMDIR_FAILED	= (15   | CPIOERR_CHECK_ERRNO),
	CPIOERR_MKNOD_FAILED	= (16   | CPIOERR_CHECK_ERRNO),
	CPIOERR_MKFIFO_FAILED	= (17   | CPIOERR_CHECK_ERRNO),
	CPIOERR_LINK_FAILED	= (18   | CPIOERR_CHECK_ERRNO),
	CPIOERR_READLINK_FAILED	= (19   | CPIOERR_CHECK_ERRNO),
	CPIOERR_READ_FAILED	= (20   | CPIOERR_CHECK_ERRNO),
	CPIOERR_COPY_FAILED	= (21   | CPIOERR_CHECK_ERRNO),
	CPIOERR_HDR_SIZE	= (22			),
	CPIOERR_HDR_TRAILER	= (23			),
	CPIOERR_UNKNOWN_FILETYPE= (24			),
	CPIOERR_MISSING_HARDLINK= (25			),
	CPIOERR_MD5SUM_MISMATCH	= (26			),
	CPIOERR_INTERNAL	= (27			)
};

/** \ingroup payload
 */
typedef enum cpioMapFlags_e {
    CPIO_MAP_PATH	= (1 << 0),
    CPIO_MAP_MODE	= (1 << 1),
    CPIO_MAP_UID	= (1 << 2),
    CPIO_MAP_GID	= (1 << 3),
    CPIO_FOLLOW_SYMLINKS= (1 << 4), /* only for building. */
    CPIO_MAP_ABSOLUTE	= (1 << 5),
    CPIO_MAP_ADDDOT	= (1 << 6),
    CPIO_MULTILIB	= (1 << 31) /* internal, only for building. */
} cpioMapFlags;

#define CPIO_NEWC_MAGIC	"070701"
#define CPIO_CRC_MAGIC	"070702"
#define CPIO_TRAILER	"TRAILER!!!"

/** \ingroup payload
 * Cpio archive header information.
 */
struct cpioCrcPhysicalHeader {
    char magic[6];
    char inode[8];
    char mode[8];
    char uid[8];
    char gid[8];
    char nlink[8];
    char mtime[8];
    char filesize[8];
    char devMajor[8];
    char devMinor[8];
    char rdevMajor[8];
    char rdevMinor[8];
    char namesize[8];
    char checksum[8];			/* ignored !! */
};

#define	PHYS_HDR_SIZE	110		/*!< Don't depend on sizeof(struct) */

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Write cpio trailer.
 * @retval fsm		file path and stat info
 * @return		0 on success
 */
int cpioTrailerWrite(FSM_t fsm);

/**
 * Write cpio header.
 * @retval fsm		file path and stat info
 * @return		0 on success
 */
int cpioHeaderWrite(FSM_t fsm, struct stat * st);

/**
 * Read cpio header.
 * @retval fsm		file path and stat info
 * @return		0 on success
 */
int cpioHeaderRead(FSM_t fsm, struct stat * st)
	/*@modifies fsm, *st @*/;

/** \ingroup payload
 * Return formatted error message on payload handling failure.
 * @param		error code
 * @return		formatted error string
 */
/*@observer@*/ const char *const cpioStrerror(int rc)		/*@*/;

#ifdef __cplusplus
}
#endif

#endif	/* H_CPIO */