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| author | Aaro Koskinen <aaro.koskinen@iki.fi> | 2012-02-04 21:55:01 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2012-02-04 21:55:01 +0100 |
| commit | 6e9d047c1558f92531ea12b9e3206023ab77cf51 (patch) | |
| tree | 5c1c7b2d8b20fc64d18208075282b771287678ba /shell/cttyhack.c | |
| parent | ef43beac63aa7e4b2bccb069e47b5e4902bb895f (diff) | |
| download | busybox-6e9d047c1558f92531ea12b9e3206023ab77cf51.tar.gz | |
cttyhack: handle multiple consoles found in sysfs
If multiple consoles are found from the sysfs file, cttyhack fails:
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 <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/cttyhack.c')
| -rw-r--r-- | shell/cttyhack.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/shell/cttyhack.c b/shell/cttyhack.c index 6ff867413..f9b59c263 100644 --- a/shell/cttyhack.c +++ b/shell/cttyhack.c @@ -123,15 +123,22 @@ int cttyhack_main(int argc UNUSED_PARAM, char **argv) * TIOCGSERIAL check, which assumes that all * serial lines follow /dev/ttySn convention - * which is not always the case. - * Therefore, we use this methos first: + * Therefore, we use this method first: */ int s = open_read_close("/sys/class/tty/console/active", console + 5, sizeof(console) - 5); if (s > 0) { - /* found active console via sysfs (Linux 2.6.38+) - * sysfs string looks like "ttyS0\n" so zap the newline: + char *last; + /* Found active console via sysfs (Linux 2.6.38+). + * It looks like "[tty0 ]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) + overlapping_strcpy(console + 5, last + 1); break; } |