GETDOMAINNAMESection: Linux Programmer's Manual (2)
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NAMEgetdomainname, setdomainname - get/set domain name
DESCRIPTIONThese functions are used to access or to change the domain name of the current processor. If the null-terminated domain name requires more than len bytes, getdomainname() returns the first len bytes (glibc) or returns an error (libc).
RETURN VALUEOn success, zero is returned. On error, -1 is returned, and errno is set appropriately.
- For setdomainname(): name pointed outside of user address space.
- For getdomainname() under libc: name is NULL or name is longer than len bytes.
- For setdomainname(): len was negative or too large.
- For setdomainname(): the caller is unprivileged (Linux: does not have the CAP_SYS_ADMIN capability).
CONFORMING TOPOSIX does not specify these calls.
SEE ALSOgethostname(2), sethostname(2), uname(2)