Format error messages properly

[slstatus.git] / components / uptime.c

diff --git a/components/uptime.c b/components/uptime.c
index c5e28ee..a3082f2 100644 (file)
--- a/components/uptime.c
+++ b/components/uptime.c
@@ -1,8 +1,10 @@
 /* See LICENSE file for copyright and license details. */
+#include <errno.h>
 #include <stdio.h>
-#ifdef __linux__
+#include <string.h>
+#if defined(__linux__)
 #include <sys/sysinfo.h>
-#elif __OpenBSD__
+#elif defined(__OpenBSD__)
 #include <sys/sysctl.h>
 #include <sys/time.h>
 #endif
@@ -15,12 +17,12 @@ uptime(void)
        int h;
        int m;
        int uptime = 0;
-#ifdef __linux__
+#if defined(__linux__)
        struct sysinfo info;
 
        sysinfo(&info);
        uptime = info.uptime;
-#elif __OpenBSD__
+#elif defined(__OpenBSD__)
        int mib[2];
        size_t size;
        time_t now;
@@ -35,8 +37,10 @@ uptime(void)
 
        if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1)
                uptime = now - boottime.tv_sec;
-       else
+       else {
+               fprintf(stderr, "sysctl 'KERN_BOOTTIME': %s\n", strerror(errno));
                return NULL;
+       }
 #endif
        h = uptime / 3600;
        m = (uptime - h * 3600) / 60;