/*
* These structs are used by the system-use-sharing protocol, in which the
* Rock Ridge extensions are embedded. It is quite possible that other
* extensions are present on the disk, and this is fine as long as they
* all use SUSP
*/
struct SU_SP_s {
unsigned char magic[2];
unsigned char skip;
} __attribute__ ((packed));
struct SU_CE_s {
char extent[8];
char offset[8];
char size[8];
};
struct SU_ER_s {
unsigned char len_id;
unsigned char len_des;
unsigned char len_src;
unsigned char ext_ver;
char data[0];
} __attribute__ ((packed));
struct RR_RR_s {
char flags[1];
} __attribute__ ((packed));
struct RR_PX_s {
char mode[8];
char n_links[8];
char uid[8];
char gid[8];
};
struct RR_PN_s {
char dev_high[8];
char dev_low[8];
};
struct SL_component {
unsigned char flags;
unsigned char len;
char text[0];
} __attribute__ ((packed));
struct RR_SL_s {
unsigned char flags;
struct SL_component link;
} __attribute__ ((packed));
struct RR_NM_s {
unsigned char flags;
char name[0];
} __attribute__ ((packed));
struct RR_CL_s {
char location[8];
};
struct RR_PL_s {
char location[8];
};
struct stamp {
char time[7];
} __attribute__ ((packed));
struct RR_TF_s {
char flags;
struct stamp times[0]; /* Variable number of these beasts */
} __attribute__ ((packed));
/* Linux-specific extension for transparent decompression */
struct RR_ZF_s {
char algorithm[2];
char parms[2];
char real_size[8];
};
/*
* These are the bits and their meanings for flags in the TF structure.
*/
#define TF_CREATE 1
#define TF_MODIFY 2
#define TF_ACCESS 4
#define TF_ATTRIBUTES 8
#define TF_BACKUP 16
#define TF_EXPIRATION 32
#define TF_EFFECTIVE 64
#define TF_LONG_FORM 128
struct rock_ridge {
char signature[2];
unsigned char len;
unsigned char version;
union {
struct SU_SP_s SP;
struct SU_CE_s CE;
struct SU_ER_s ER;
struct RR_RR_s RR;
struct RR_PX_s PX;
struct RR_PN_s PN;
struct RR_SL_s SL;
struct RR_NM_s NM;
struct RR_CL_s CL;
struct RR_PL_s PL;
struct RR_TF_s TF;
struct RR_ZF_s ZF;
} u;
};
#define RR_PX 1 /* POSIX attributes */
#define RR_PN 2 /* POSIX devices */
#define RR_SL 4 /* Symbolic link */
#define RR_NM 8 /* Alternate Name */
#define RR_CL 16 /* Child link */
#define RR_PL 32 /* Parent link */
#define RR_RE 64 /* Relocation directory */
#define RR_TF 128 /* Timestamps */
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