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copystr.9freebsd
Langue: en
Version: 307459 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
BSD mandoc
NAME
copy copyin copyout copystr copyinstr - kernel copy functionsSYNOPSIS
In sys/types.h In sys/systm.h Ft int Fn copyin const void *uaddr void *kaddr size_t len Ft int Fn copyout const void *kaddr void *uaddr size_t len Ft int Fn copystr const void *kfaddr void *kdaddr size_t len size_t *done Ft int Fn copyinstr const void *uaddr void *kaddr size_t len size_t *doneDESCRIPTION
The functions are designed to copy contiguous data from one address to another. All but Fn copystr copy data from user-space to kernel-space or vice-versa.The routines provide the following functionality:
- Fn copyin
- Copies Fa len bytes of data from the user-space address Fa uaddr to the kernel-space address Fa kaddr .
- Fn copyout
- Copies Fa len bytes of data from the kernel-space address Fa kaddr to the user-space address Fa uaddr .
- Fn copystr
- Copies a NUL-terminated string, at most Fa len bytes long, from kernel-space address Fa kfaddr to kernel-space address Fa kdaddr . The number of bytes actually copied, including the terminating NUL, is returned in Fa *done (if Fa done is non- NULL
- Fn copyinstr
- Copies a NUL-terminated string, at most Fa len bytes long, from user-space address Fa uaddr to kernel-space address Fa kaddr . The number of bytes actually copied, including the terminating NUL, is returned in Fa *done (if Fa done is non- NULL
RETURN VALUES
The functions return 0 on success or Er EFAULT if a bad address is encountered. In addition, the Fn copystr , and Fn copyinstr functions return Er ENAMETOOLONG if the string is longer than Fa len bytes.SEE ALSO
fetch(9), store(9)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre