| /* |
| * include/linux/random.h |
| * |
| * Include file for the random number generator. |
| */ |
| |
| #ifndef _LINUX_RANDOM_H |
| #define _LINUX_RANDOM_H |
| |
| #include <linux/types.h> |
| #include <linux/ioctl.h> |
| #include <linux/irqnr.h> |
| |
| /* ioctl()'s for the random number generator */ |
| |
| /* Get the entropy count. */ |
| #define RNDGETENTCNT _IOR( 'R', 0x00, int ) |
| |
| /* Add to (or subtract from) the entropy count. (Superuser only.) */ |
| #define RNDADDTOENTCNT _IOW( 'R', 0x01, int ) |
| |
| /* Get the contents of the entropy pool. (Superuser only.) */ |
| #define RNDGETPOOL _IOR( 'R', 0x02, int [2] ) |
| |
| /* |
| * Write bytes into the entropy pool and add to the entropy count. |
| * (Superuser only.) |
| */ |
| #define RNDADDENTROPY _IOW( 'R', 0x03, int [2] ) |
| |
| /* Clear entropy count to 0. (Superuser only.) */ |
| #define RNDZAPENTCNT _IO( 'R', 0x04 ) |
| |
| /* Clear the entropy pool and associated counters. (Superuser only.) */ |
| #define RNDCLEARPOOL _IO( 'R', 0x06 ) |
| |
| struct rand_pool_info { |
| int entropy_count; |
| int buf_size; |
| __u32 buf[0]; |
| }; |
| |
| /* |
| * Flags for getrandom(2) |
| * |
| * GRND_NONBLOCK Don't block and return EAGAIN instead |
| * GRND_RANDOM Use the /dev/random pool instead of /dev/urandom |
| */ |
| #define GRND_NONBLOCK 0x0001 |
| #define GRND_RANDOM 0x0002 |
| |
| #endif /* _LINUX_RANDOM_H */ |
