Fix compile on Linux.

1 files changed, 40 insertions, 7 deletions

diff --git a/src/librc/librc.c b/src/librc/librc.c
index f323d0fd..12d31348 100644
--- a/src/librc/librc.c
+++ b/src/librc/librc.c
@@ -147,6 +147,43 @@ static bool rm_dir (const char *pathname, bool top)
 	return (true);
 }
 
+/* Other systems may need this at some point, but for now it's Linux only */
+#ifdef __linux__
+static bool file_regex (const char *file, const char *regex)
+{
+	FILE *fp;
+	char *line;
+	regex_t re;
+	bool retval = false;
+	int result;
+
+	if (! (fp = fopen (file, "r")))
+		return (false);
+
+	if ((result = regcomp (&re, regex, REG_EXTENDED | REG_NOSUB)) != 0) {
+		fclose (fp);
+		line = xmalloc (sizeof (char) * BUFSIZ);
+		regerror (result, &re, line, BUFSIZ);
+		fprintf (stderr, "file_regex: %s", line);
+		free (line);
+		return (false);
+	}
+
+	while ((line = rc_getline (fp))) {
+		if (regexec (&re, line, 0, NULL, 0) == 0)
+			retval = true;
+		free (line);
+		if (retval)
+			break;
+	}
+	fclose (fp);
+	regfree (&re);
+
+	return (retval);
+}
+#endif
+
+
 const char *rc_sys (void)
 {
 #ifdef __FreeBSD__
@@ -160,13 +197,9 @@ const char *rc_sys (void)
 
 #ifdef __linux__
 	if (exists ("/proc/xen")) {
-		if ((fp = fopen ("/proc/xen/capabilities", "r"))) {
-			fclose (fp);
-			if (file_regex ("/proc/xen/capabilities", "control_d"))
-				return (RC_SYS_XEN0);
-		}
-		if (! sys[0])
-			return (RC_SYS_XENU);
+		if (file_regex ("/proc/xen/capabilities", "control_d"))
+			return (RC_SYS_XEN0);
+		return (RC_SYS_XENU);
 	} else if (file_regex ("/proc/cpuinfo", "UML"))
 		return (RC_SYS_UML);
 	else if (file_regex ("/proc/self/status",