Add a new sethostname module

Define sethostname on platforms that do not provide the declaration.
Provide a function for platforms that lack it.  The general handling
of the provided function is to simply return -1 and set errno to
ENOSYS.  A specific handler is provided for Minix.

* lib/sethostname.c (sethostname): New file.  Provide sethostname
for systems that lack it.
* m4/sethostname.m4 (gl_FUNC_SETHOSTNAME): New file.  Detection of
sethostname declaration and function.
* modules/sethostname: New file.  Define the sethostname module.

Signed-off-by: Ben Walton <bwalton@artsci.utoronto.ca>

1 files changed, 31 insertions, 0 deletions

diff --git a/modules/sethostname b/modules/sethostname
new file mode 100644
index 0000000000..80087569c4
--- /dev/null
+++ b/modules/sethostname
@@ -0,0 +1,31 @@
+Description:
+sethostname() function: Set machine's hostname.
+
+Files:
+lib/sethostname.c
+m4/sethostname.m4
+m4/gethostname.m4
+
+Depends-on:
+unistd
+errno           [test $HAVE_SETHOSTNAME = 0]
+
+configure.ac:
+gl_FUNC_SETHOSTNAME
+if test $HAVE_SETHOSTNAME = 0; then
+  AC_LIBOBJ([sethostname])
+fi
+gl_UNISTD_MODULE_INDICATOR([sethostname])
+
+Makefile.am:
+
+Include:
+<unistd.h>
+
+Link:
+
+License:
+LGPLv2+
+
+Maintainer:
+Ben Walton