From 548fb0da730072d8c96b40ce29b024dd16cbab92 Mon Sep 17 00:00:00 2001 From: Marc-André Lureau Date: Wed, 20 Apr 2022 17:26:14 +0400 Subject: qga: move qga_get_host_name() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The function is specific to qemu-ga, no need to share it in QEMU. Signed-off-by: Marc-André Lureau Reviewed-by: Daniel P. Berrangé Reviewed-by: Konstantin Kostiuk Message-Id: <20220420132624.2439741-32-marcandre.lureau@redhat.com> --- qga/commands-posix.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'qga/commands-posix.c') diff --git a/qga/commands-posix.c b/qga/commands-posix.c index 390c1560e1..77f4672ca2 100644 --- a/qga/commands-posix.c +++ b/qga/commands-posix.c @@ -3278,3 +3278,38 @@ GuestDeviceInfoList *qmp_guest_get_devices(Error **errp) return NULL; } + +#ifndef HOST_NAME_MAX +# ifdef _POSIX_HOST_NAME_MAX +# define HOST_NAME_MAX _POSIX_HOST_NAME_MAX +# else +# define HOST_NAME_MAX 255 +# endif +#endif + +char *qga_get_host_name(Error **errp) +{ + long len = -1; + g_autofree char *hostname = NULL; + +#ifdef _SC_HOST_NAME_MAX + len = sysconf(_SC_HOST_NAME_MAX); +#endif /* _SC_HOST_NAME_MAX */ + + if (len < 0) { + len = HOST_NAME_MAX; + } + + /* Unfortunately, gethostname() below does not guarantee a + * NULL terminated string. Therefore, allocate one byte more + * to be sure. */ + hostname = g_new0(char, len + 1); + + if (gethostname(hostname, len) < 0) { + error_setg_errno(errp, errno, + "cannot get hostname"); + return NULL; + } + + return g_steal_pointer(&hostname); +} -- cgit 1.4.1