1 files changed, 59 insertions, 0 deletions
diff --git a/lib/util/gethostname.c b/lib/util/gethostname.c
new file mode 100644
index 0000000..894aefa
--- /dev/null
+++ b/lib/util/gethostname.c
@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2015 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "sudo_compat.h"
+#include "sudo_util.h"
+
+/*
+ * Return a malloc()ed copy of the system hostname, or NULL if 
+ * malloc() or gethostname() fails.
+ */
+char *
+sudo_gethostname_v1(void)
+{
+    char *hname;
+    size_t host_name_max;
+
+#ifdef _SC_HOST_NAME_MAX
+    host_name_max = (size_t)sysconf(_SC_HOST_NAME_MAX);
+    if (host_name_max == (size_t)-1)
+#endif
+	host_name_max = 255;	/* POSIX and historic BSD */
+
+    hname = malloc(host_name_max + 1);
+    if (hname != NULL) {
+	if (gethostname(hname, host_name_max + 1) == 0 && *hname != '\0') {
+	    /* Old gethostname() may not NUL-terminate if there is no room. */
+	    hname[host_name_max] = '\0';
+	} else {
+	    free(hname);
+	    hname = NULL;
+	}
+    }
+    return hname;
+}