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GETHOSTNAME(3) BSD 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, int namelen); int sethostname(const char *name, int namelen); DESCRIPTION The gethostname() function returns the standard host name for the current processor, as previously set by sethostname(). The namelen argument specifies the size of the name array. The returned name is null-termi- nated unless insufficient space is provided. The sethostname() function sets the name of the host machine to be name, which has length namelen. This call is restricted to the super-user and is normally used only when the system is bootstrapped. RETURN VALUES Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS The following errors may be returned by these calls: [EFAULT] The name or namelen argument gave an invalid address. [EPERM] The caller tried to set the hostname and was not the super-user. SEE ALSO gethostid(3), sysctl(3) BUGS Host names are limited to MAXHOSTNAMELEN (from <sys/param.h>) characters, currently 256. This includes the trailing NUL. HISTORY The gethostname() function appeared in 4.2BSD. BSD June 4, 1993 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | BUGS | HISTORY
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