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gethostname(3c)

gethostname(3C)          Standard C Library Functions          gethostname(3C)

NAME
       gethostname, sethostname - get or set name of current host

SYNOPSIS
       #include <unistd.h>

       int gethostname(char *name, size_t namelen);


       int sethostname(char *name, size_t namelen);

DESCRIPTION
       The  gethostname() function returns the standard host name for the cur‐
       rent zone, as previously set by  sethostname().  The  namelen  argument
       specifies  the  size of the array pointed to by name. The returned name
       is null-terminated unless insufficient space is provided.


       The sethostname() function sets the host name of the currrent  zone  to
       be name, which has length namelen. This call requires the {PRIV_SYS_AD‐
       MIN} privilege and is normally used only when the system is booted.


       Host names are limited to MAXHOSTNAMELEN characters, currently 256, de‐
       fined in the <netdb.h> header.

RETURN VALUES
       Upon  successful  completion, gethostname() and sethostname() return 0.
       Otherwise, they return −1 and set errno to indicate the error.

ERRORS
       The gethostname() and sethostname() functions will fail if:

       EFAULT    The name argument is an invalid address.



       The sethostname() function will fail if:

       EPERM    The {PRIV_SYS_ADMIN} privilege was not asserted in the  effec‐
                tive set of the calling process.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:

       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelMT-Safe _  Stan‐
       dardSee standards(7).


SEE ALSO
       hostname(1), sysinfo(2), uname(2), gethostid(3C), attributes(7), privi‐
       leges(7), standards(7)

Oracle Solaris 11.4               3 Nov 2021                   gethostname(3C)
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