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#ifndef H_CPIO
#define H_CPIO
/** \ingroup payload
* \file 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).
*
*/
typedef struct rpmcpio_s * rpmcpio_t;
#ifdef __cplusplus
extern "C" {
#endif
/**
* Create CPIO file object
* @param fd file
* @param mode XXX
* @return CPIO object
**/
rpmcpio_t rpmcpioOpen(FD_t fd, char mode);
int rpmcpioClose(rpmcpio_t cpio);
off_t rpmcpioTell(rpmcpio_t cpio);
rpmcpio_t rpmcpioFree(rpmcpio_t cpio);
/**
* Write cpio header.
* @param cpio cpio archive
* @param path file name
* @param st stat struct with meta data
* @return 0 on success
*/
RPM_GNUC_INTERNAL
int rpmcpioHeaderWrite(rpmcpio_t cpio, char * path, struct stat * st);
RPM_GNUC_INTERNAL
int rpmcpioStrippedHeaderWrite(rpmcpio_t cpio, int fx, off_t fsize);
ssize_t rpmcpioWrite(rpmcpio_t cpio, const void * buf, size_t size);
/**
* Read cpio header. Iff fx is returned as -1 a cpio header was read
* and the file name is found in path. Otherwise a stripped header was read
* and the fx is the number of the file in the header/rpmfi. In this case
* rpmcpioSetExpectedFileSize() needs to be called with the file size of the
* payload content - with may be zero for hard links, directory or other
* special files.
* @param[out] fsm file path and stat info
* @param[out] path path of the file
* @param[out] fx number in the header of the file read
* @return 0 on success
*/
RPM_GNUC_INTERNAL
int rpmcpioHeaderRead(rpmcpio_t cpio, char ** path, int * fx);
/**
* Tell the cpio object the expected file size in the payload.
* The size must be zero for all but the last of hard linked files,
* directories and special files.
* This is needed after reading a stripped cpio header! See above.
*/
RPM_GNUC_INTERNAL
void rpmcpioSetExpectedFileSize(rpmcpio_t cpio, off_t fsize);
ssize_t rpmcpioRead(rpmcpio_t cpio, void * buf, size_t size);
#ifdef __cplusplus
}
#endif
#endif /* H_CPIO */
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