fixed hostname function and added HOST_NAME_MAX limit

[slstatus.git] / slstatus.c

diff --git a/slstatus.c b/slstatus.c
index 9cd5ae2..404ead6 100644 (file)
--- a/slstatus.c
+++ b/slstatus.c
@@ -5,6 +5,7 @@
 #include <arpa/inet.h>
 #include <fcntl.h>
 #include <ifaddrs.h>
+#include <limits.h>
 #include <locale.h>
 #include <netdb.h>
 #include <stdarg.h>
@@ -208,6 +209,29 @@ entropy(const char *null)
     return smprintf("%d", entropy);
 }
 
+/* hostname */
+char *
+hostname(const char *null)
+{
+    char hostname[HOST_NAME_MAX];
+    FILE *fp;
+
+    /* open hostname file */
+    if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
+        fprintf(stderr, "Could not open hostname file.\n");
+        return smprintf("n/a");
+    }
+
+    /* extract hostname */
+    fscanf(fp, "%s\n", hostname);
+
+    /* close hostname file */
+    fclose(fp);
+
+    /* return entropy */
+    return smprintf("%s", hostname);
+}
+
 /* ip address */
 char *
 ip(const char *interface)