Index: b/lib/routines.c
===================================================================
--- a/lib/routines.c
+++ b/lib/routines.c
@@ -242,3 +242,50 @@
   /* Don't complain if you can't unlink.  Who cares of a tmp file? */
   unlink (filename);
 }
+
+/*
+ * Securely generate a temp file, and make sure it gets
+ * deleted upon exit.
+ */
+static char **	tempfiles;
+static unsigned	ntempfiles;
+
+static void
+cleanup_tempfiles()
+{
+	while (ntempfiles--)
+		unlink(tempfiles[ntempfiles]);
+}
+
+char *
+safe_tempnam(const char *pfx)
+{
+	char	*dirname, *filename;
+	int	fd;
+
+	if (!(dirname = getenv("TMPDIR")))
+		dirname = "/tmp";
+
+	tempfiles = (char **) realloc(tempfiles,
+			(ntempfiles+1) * sizeof(char *));
+	if (tempfiles == NULL)
+		return NULL;
+
+	filename = malloc(strlen(dirname) + strlen(pfx) + sizeof("/XXXXXX"));
+	if (!filename)
+		return NULL;
+
+	sprintf(filename, "%s/%sXXXXXX", dirname, pfx);
+
+	if ((fd = mkstemp(filename)) < 0) {
+		free(filename);
+		return NULL;
+	}
+	close(fd);
+
+	if (ntempfiles == 0)
+		atexit(cleanup_tempfiles);
+	tempfiles[ntempfiles++] = filename;
+
+	return filename;
+}
Index: b/lib/routines.h
===================================================================
--- a/lib/routines.h
+++ b/lib/routines.h
@@ -255,7 +255,8 @@
 /* If _STR_ is not defined, give it a tempname in _TMPDIR_ */
 #define tempname_ensure(Str)				\
 do {							\
-  (Str) = (Str) ? (Str) : tempnam (NULL, "a2_");	\
+  (Str) = (Str) ? (Str) : safe_tempnam("a2_");	\
 } while (0)
+char * safe_tempnam(const char *);
 
 #endif
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<div class='path'>path: <a href='/guix/log/?id=f6abff7bd4f6ab3c8257e97154aa5814babab562'>root</a>/<a href='/guix/log/gnu?id=f6abff7bd4f6ab3c8257e97154aa5814babab562'>gnu</a>/<a href='/guix/log/gnu/services?id=f6abff7bd4f6ab3c8257e97154aa5814babab562'>services</a>/<a href='/guix/log/gnu/services/auditd.scm?id=f6abff7bd4f6ab3c8257e97154aa5814babab562'>auditd.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/auditd.scm?id=f6abff7bd4f6ab3c8257e97154aa5814babab562&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-06-06 22:23:35 +0200'>2019-06-06</span></td><td><a href='/guix/commit/gnu/services/auditd.scm?id=07023ebc1892a559cad1f80235a4afb0955b29ab'>services: Add auditd.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/auditd.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* doc/guix.texi (Miscellaneous Services): Document it.
</span></span></td><td>Danny Milosavljevic</td></tr>