open syscall

int open(const char __user *path, unsigned long access_flags, unsigned long mode_flags, fd_t __user *fd);

Open path and return the newly created file descriptor through fd.

Returns 0 on success, a negative errno on failure.

access_flags is the bitwise-or of zero or more of the following macros defined in uapi/file.h.

• FILE_PERM_READ
• FILE_PERM_WRITE
• FILE_PERM_EXEC

mode_flags is the bitwise-or of zero or more of the following macros defined in uapi/file.h.

• FILE_MODE_WRITE_EXTEND
• FILE_MODE_OPEN_TRUNC
• FILE_MODE_NON_BLOCK