main: switch to primary console vt on crash

[elogind.git] / util.c

diff --git a/util.c b/util.c
index 52ca5e25631a9e56f8fd5e27df7c63d777b6d50a..f9eae6bba1e8818b7d56c8174664f33626975c7c 100644 (file)
--- a/util.c
+++ b/util.c
@@ -34,6 +34,9 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <dirent.h>
+#include <sys/ioctl.h>
+#include <linux/vt.h>
+#include <linux/tiocl.h>
 
 #include "macro.h"
 #include "util.h"
@@ -1276,6 +1279,49 @@ char *format_timestamp(char *buf, size_t l, usec_t t) {
         return buf;
 }
 
+bool fstype_is_network(const char *fstype) {
+        static const char * const table[] = {
+                "cifs",
+                "smbfs",
+                "ncpfs",
+                "nfs",
+                "nfs4"
+        };
+
+        unsigned i;
+
+        for (i = 0; i < ELEMENTSOF(table); i++)
+                if (streq(table[i], fstype))
+                        return true;
+
+        return false;
+}
+
+int chvt(int vt) {
+        int fd, r = 0;
+
+        if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
+                return -errno;
+
+        if (vt < 0) {
+                int tiocl[2] = {
+                        TIOCL_GETKMSGREDIRECT,
+                        0
+                };
+
+                if (ioctl(fd, TIOCLINUX, tiocl) < 0)
+                        return -errno;
+
+                vt = tiocl[0] <= 0 ? 1 : tiocl[0];
+        }
+
+        if (ioctl(fd, VT_ACTIVATE, vt) < 0)
+                r = -errno;
+
+        close_nointr(r);
+        return r;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",