Read link connect function handler
QNX SDP8.0Getting Started with the QNX OSDeveloperUser
Prototype:
int (*readlink) ( resmgr_context_t *ctp,
io_readlink_t *msg,
RESMGR_HANDLE_T *handle,
void *reserved )
Classification:
ConnectDefault handler:
noneHelper functions:
iofunc_readlink()Client function:
readlink(), readlinkat()Messages:
_IO_CONNECT with subtype _IO_CONNECT_READLINKData structure:
struct _io_connect {
// internal fields (as described above)
uint16_t path_len;
uint8_t extra_type;
uint16_t extra_len;
char path [1];
};
struct _io_connect_link_reply {
uint32_t reserved1;
uint32_t file_type;
uint8_t eflag;
uint8_t reserved2[1];
uint16_t chroot_len;
uint32_t umask;
uint16_t nentries;
uint16_t path_len;
};
struct _io_connect_ftype_reply {
uint16_t status; /* Typically an errno */
uint16_t reserved;
uint32_t file_type; /* _FTYPE_? in sys/ftype.h */
};
typedef union {
struct _io_connect connect;
struct _io_connect_link_reply link_reply;
struct _io_connect_ftype_reply ftype_reply;
} io_readlink_t;
Description:
Responsible for reading the contents of a symbolic link as specified by the path member of the input structure. The bytes returned are the contents of the symbolic link; the status returned is the number of bytes in the reply. A valid return should be done only for a symbolic link; all other accesses should return an error code.Returns:
The status via the helper macro _RESMGR_STATUS() and the data via message reply.Referenced by:
resmgr_connect_funcs_t connect tablePermission checking:
The iofunc_readlink() function does not perform any permission checking.
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