SIMPLE SOLUTIONS

GETDOMAINNAME(2) - man page online | system calls

Get/set NIS domain name.

Chapter
2012-10-25
GETDOMAINNAME(2)                    Linux Programmer's Manual                    GETDOMAINNAME(2)

NAME getdomainname, setdomainname - get/set NIS domain name
SYNOPSIS #include <unistd.h> int getdomainname(char *name, size_t len); int setdomainname(const char *name, size_t len); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): getdomainname(), setdomainname(): _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
DESCRIPTION These functions are used to access or to change the NIS domain name of the host system. setdomainname() sets the domain name to the value given in the character array name. The len argument specifies the number of bytes in name. (Thus, name does not require a termiā€ nating null byte.) getdomainname() returns the null-terminated domain name in the character array name, which has a length of len bytes. If the null-terminated domain name requires more than len bytes, getdomainname() returns the first len bytes (glibc) or gives an error (libc).
RETURN VALUE On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS setdomainname() can fail with the following errors: EFAULT name pointed outside of user address space. EINVAL len was negative or too large. EPERM the caller is unprivileged (Linux: does not have the CAP_SYS_ADMIN capability). getdomainname() can fail with the following errors: EINVAL For getdomainname() under libc: name is NULL or name is longer than len bytes.
CONFORMING TO POSIX does not specify these calls.
NOTES Since Linux 1.0, the limit on the length of a domain name, including the terminating null byte, is 64 bytes. In older kernels, it was 8 bytes. On most Linux architectures (including x86), there is no getdomainname() system call; instead, glibc implements getdomainname() as a library function that returns a copy of the domainname field returned from a call to uname(2).
SEE ALSO gethostname(2), sethostname(2), uname(2)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-10-25 GETDOMAINNAME(2)
This manual Reference Other manuals
getdomainname(2) referred by apparmor(7) | capabilities(7) | clone(2) | domainname(8) | explain(1) | explain(3) | explain_getdomainname(3) | explain_getdomainname_or_die(3) | explain_setdomainname(3) | explain_setdomainname_or_die(3) | ftp-proxy.conf(5) | gethostname(2) | hostname(1) | mixmaster(1) | namespaces(7) | syscalls(2) | uname(2)
refer to feature_test_macros(7) | gethostname(2) | uname(2)