X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Futil.c;h=b8e73ef4bf44a4380129796bcce5c1302c3e46ba;hp=92268b69a95e4bd560102520f0d03a99842d6886;hb=a76fad090a6a1388fbaa609e8ca37e82223d2bd7;hpb=fc116c6a19877275eabb085cf03f0df23b17c0e9

diff --git a/src/util.c b/src/util.c
index 92268b69a..b8e73ef4b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -2134,8 +2134,32 @@ finish:
 
 int open_terminal(const char *name, int mode) {
         int fd, r;
+        unsigned c = 0;
 
-        if ((fd = open(name, mode)) < 0)
+        /*
+         * If a TTY is in the process of being closed opening it might
+         * cause EIO. This is horribly awful, but unlikely to be
+         * changed in the kernel. Hence we work around this problem by
+         * retrying a couple of times.
+         *
+         * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
+         */
+
+        for (;;) {
+                if ((fd = open(name, mode)) >= 0)
+                        break;
+
+                if (errno != EIO)
+                        return -errno;
+
+                if (c >= 20)
+                        return -errno;
+
+                usleep(50 * USEC_PER_MSEC);
+                c++;
+        }
+
+        if (fd < 0)
                 return -errno;
 
         if ((r = isatty(fd)) < 0) {