If multiple consoles are found from the sysfs file, cttyhack will fail:
cttyhack: can't open '/dev/tty0 ttyS0': No such file or directory
In such cases take the last one as the kernel will use that one for
/dev/console.
Signed-off-by: Aaro Koskinen <[email protected]>
---
shell/cttyhack.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/shell/cttyhack.c b/shell/cttyhack.c
index 6ff8674..b2614b5 100644
--- a/shell/cttyhack.c
+++ b/shell/cttyhack.c
@@ -128,10 +128,19 @@ int cttyhack_main(int argc UNUSED_PARAM, char **argv)
int s = open_read_close("/sys/class/tty/console/active",
console + 5, sizeof(console) - 5);
if (s > 0) {
+ char *last;
/* found active console via sysfs (Linux
2.6.38+)
* sysfs string looks like "ttyS0\n" so zap the
newline:
*/
console[4 + s] = '\0';
+ /* if there are multiple consoles, take the last
+ * one:
+ */
+ last = strrchr(console + 5, ' ');
+ if (last != NULL)
+ memmove(console + 5,
+ last + 1,
+ s - (last - (console + 5)) - 1);
break;
}
--
1.7.2.5
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