UNAME

uname − get name and information about current kernel

#include <sys/utsname.h>

int uname(struct utsname *buf);

uname returns system information in buf. The utsname struct is as defined in <sys/utsname.h>:

struct utsname {
               char sysname[SYS_NMLN];
               char nodename[SYS_NMLN];
               char release[SYS_NMLN];
               char version[SYS_NMLN];
               char machine[SYS_NMLN];
               char domainname[SYS_NMLN];
               };

On success, zero is returned. On error, −1 is returned, and errno is set appropriately.

EFAULT

buf is not valid.

SVr4, SVID, POSIX, X/OPEN

uname(1), getdomainname(2), gethostname(2)