sethostname(3) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
GETHOSTNAME(3)          NetBSD Library Functions Manual         GETHOSTNAME(3)


NAME
gethostname, sethostname -- get/set name of current host
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h> int gethostname(char *name, size_t namelen); int sethostname(const char *name, size_t namelen);
DESCRIPTION
gethostname() returns the standard host name for the current machine, as previously set by sethostname(). The parameter namelen specifies the size of the name array. The returned name is null-terminated unless insufficient space is provided. sethostname() sets the name of the host machine to be name, which has length namelen. This call is restricted to the super-user and is nor- mally used only when the system is bootstrapped.
RETURN VALUES
If the call succeeds a value of 0 is returned. If the call fails, a value of -1 is returned and an error code is placed in the global loca- tion errno.
ERRORS
If the gethostname() or sethostname() functions fail, they will set errno for any of the errors specified for the routine sysctl(3).
SEE ALSO
gethostid(3), sysctl(3), sysctl(8)
STANDARDS
The gethostname() function conforms to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').
HISTORY
The gethostname function call appeared in 4.2BSD.
BUGS
Host names are limited to MAXHOSTNAMELEN (from <sys/param.h>) characters including null-termination, currently 256. NetBSD 9.99 September 2, 2015 NetBSD 9.99
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