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| author | Jeremie Koenig <jk@jk.fr.eu.org> | 2010-07-30 06:21:21 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-07-30 17:40:37 +0200 |
| commit | 430ba79c39eeed4725c36e9c2ad61c438c8a5d3e (patch) | |
| tree | 0f825a715ccacb032df7d09dedd2f9cc1b1a4137 /shell | |
| parent | 85a359afab4743e68977086bddac301ef0675ee1 (diff) | |
| download | busybox-430ba79c39eeed4725c36e9c2ad61c438c8a5d3e.tar.gz | |
cttyhack: serial console detection is Linux-specific
Signed-off-by: Jeremie Koenig <jk@jk.fr.eu.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/cttyhack.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/shell/cttyhack.c b/shell/cttyhack.c index a80d49dc3..3a78bae29 100644 --- a/shell/cttyhack.c +++ b/shell/cttyhack.c @@ -13,7 +13,6 @@ //config:config CTTYHACK //config: bool "cttyhack" //config: default y -//config: depends on PLATFORM_LINUX //config: help //config: One common problem reported on the mailing list is "can't access tty; //config: job control turned off" error message which typically appears when @@ -59,6 +58,10 @@ //usage: "\nStarting interactive shell from boot shell script:" //usage: "\n setsid cttyhack sh" +#if !defined(__linux__) && !defined(TIOCGSERIAL) +# warning cttyhack will not be able to detect a controlling tty on this system +#endif + /* From <linux/vt.h> */ struct vt_stat { unsigned short v_active; /* active vt */ @@ -112,13 +115,19 @@ int cttyhack_main(int argc UNUSED_PARAM, char **argv) close(fd); } else { /* We don't have ctty (or don't have "/dev/tty" node...) */ - if (ioctl(0, TIOCGSERIAL, &u.sr) == 0) { + if (0) {} +#ifdef TIOCGSERIAL + else if (ioctl(0, TIOCGSERIAL, &u.sr) == 0) { /* this is a serial console */ sprintf(console + 8, "S%d", u.sr.line); - } else if (ioctl(0, VT_GETSTATE, &u.vt) == 0) { + } +#endif +#ifdef __linux__ + else if (ioctl(0, VT_GETSTATE, &u.vt) == 0) { /* this is linux virtual tty */ sprintf(console + 8, "S%d" + 1, u.vt.v_active); } +#endif if (console[8]) { fd = xopen(console, O_RDWR); //bb_error_msg("switching to '%s'", console); |