1 files changed, 123 insertions, 0 deletions
diff --git a/mfd/bi_gethostname.m4 b/mfd/bi_gethostname.m4
new file mode 100644
index 00000000..315a2d1b
--- /dev/null
+++ b/mfd/bi_gethostname.m4
@@ -0,0 +1,123 @@
+/* This file is part of Mailfromd.             -*- c -*-
+   Copyright (C) 2009 Sergey Poznyakoff
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef ENAMETOOLONG
+# define ENAMETOOLONG 0
+#endif
+
+#ifndef INITIAL_HOSTNAME_LENGTH
+# define INITIAL_HOSTNAME_LENGTH 34
+#endif
+
+#ifndef INITIAL_DOMAINNAME_LENGTH
+# define INITIAL_DOMAINNAME_LENGTH 34
+#endif
+
+/* string gethostname()
+
+   This implementation is based on xgethostname by Jim Meyering
+*/
+MF_DEFUN(gethostname, STRING)
+{
+	size_t size = INITIAL_HOSTNAME_LENGTH;
+	
+	MF_OBSTACK_BEGIN();
+	while (1) {
+		size_t nsize;
+		size_t size_1;
+		char *hostname;
+
+		MF_OBSTACK_GROW(NULL, size);
+		hostname = MF_OBSTACK_BASE();
+
+                /* Use SIZE_1 here rather than SIZE to work around the bug in
+		   SunOS 5.5's gethostname whereby it NUL-terminates HOSTNAME
+		   even when the name is as long as the supplied buffer.  */
+		size_1 = size - 1;
+		hostname[size_1 - 1] = '\0';
+		errno = 0;
+
+		if (gethostname(hostname, size_1) == 0)	{
+			if (!hostname[size_1 - 1])
+				break;
+		} else if (errno != 0
+			   && errno != ENAMETOOLONG && errno != EINVAL
+			   /* OSX/Darwin does this when the buffer is not
+			      large enough */
+			   && errno != ENOMEM) {
+			int saved_errno = errno;
+			MF_OBSTACK_CANCEL();
+			MF_THROW(mfe_failure,
+				 "%s", mu_strerror(saved_errno));
+		}
+
+		nsize = size * 2;
+		if (nsize <= size) {
+			MF_OBSTACK_CANCEL();
+			MF_THROW(mfe_failure,
+				 "%s", mu_strerror(ENOMEM));
+		}
+		size = nsize;
+	}
+	MF_RETURN_OBSTACK();
+}
+END
+
+/* string getdomainname()
+
+   This implementation is based on xgetdomainname by Jim Meyering
+*/
+MF_DEFUN(getdomainname, STRING)
+{
+	size_t size = INITIAL_DOMAINNAME_LENGTH;
+	
+	MF_OBSTACK_BEGIN();
+	while (1) {
+		size_t nsize;
+		size_t size_1;
+		char *domainname;
+		int rc;
+		
+		MF_OBSTACK_GROW(NULL, size);
+		domainname = MF_OBSTACK_BASE();
+
+		size_1 = size - 1;
+		domainname[size_1 - 1] = '\0';
+		errno = 0;
+
+		rc = getdomainname(domainname, size);
+		if (rc >= 0 && domainname[size_1] == '\0')
+			break;
+		else if (rc < 0 && errno != EINVAL) {
+			int saved_errno = errno;
+			MF_OBSTACK_CANCEL();
+			MF_THROW(mfe_failure,
+				 "%s", mu_strerror(saved_errno));
+		}
+
+		nsize = size * 2;
+		if (nsize <= size) {
+			MF_OBSTACK_CANCEL();
+			MF_THROW(mfe_failure,
+				 "%s", mu_strerror(ENOMEM));
+		}
+		size = nsize;
+	}
+	MF_RETURN_OBSTACK();
+}
+END
+		
+MF_INIT