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sulogin: Try to autoconfigure broken serial lines

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OBS-URL: https://build.opensuse.org/package/show/Base:System/util-linux?expand=0&rev=436
This commit is contained in:
Dr. Werner Fink 2020-11-04 11:09:18 +00:00 committed by Git OBS Bridge
parent fd21f8d012
commit d4cb846fae
2 changed files with 185 additions and 10 deletions
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189
util-linux-sulogin4bsc1175514.patch
View File

@ -6,14 +6,162 @@ and also not functional console devices. Redirect the error
messages to the appropiate console device.
---
sulogin.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
login-utils/sulogin-consoles.h | 1 +
login-utils/sulogin.c | 97 +++++++++++++++++++++++++++++++++++-------
2 files changed, 82 insertions(+), 16 deletions(-)
diff --git a/login-utils/sulogin-consoles.h b/login-utils/sulogin-consoles.h
index 0bfbc3871..12032c997 100644
--- a/login-utils/sulogin-consoles.h
+++ b/login-utils/sulogin-consoles.h
@@ -40,6 +40,7 @@ struct console {
int fd, id;
#define CON_SERIAL 0x0001
#define CON_NOTTY 0x0002
+#define CON_EIO 0x0004
pid_t pid;
struct chardata cp;
struct termios tio;
diff --git a/login-utils/sulogin.c b/login-utils/sulogin.c
index 9091caf14..7ee8f2dc7 100644
index 9091caf14..c833796e7 100644
--- a/login-utils/sulogin.c
+++ b/login-utils/sulogin.c
@@ -608,7 +608,7 @@ static const char *getpasswd(struct console *con)
@@ -52,6 +52,7 @@
#ifdef __linux__
# include <sys/kd.h>
# include <sys/param.h>
+# include <linux/serial.h>
#endif
#include "c.h"
@@ -104,6 +105,9 @@ static void tcinit(struct console *con)
int flags = 0, mode = 0;
struct termios *tio = &con->tio;
const int fd = con->fd;
+#if defined(TIOCGSERIAL)
+ struct serial_struct serinfo;
+#endif
#ifdef USE_PLYMOUTH_SUPPORT
struct termios lock;
int i = (plymouth_command(MAGIC_PING)) ? PLYMOUTH_TERMIOS_FLAGS_DELAY : 0;
@@ -123,27 +127,72 @@ static void tcinit(struct console *con)
}
memset(&lock, 0, sizeof(struct termios));
ioctl(fd, TIOCSLCKTRMIOS, &lock);
+ errno = 0;
#endif
+
+#if defined(TIOCGSERIAL)
+ if (ioctl(fd, TIOCGSERIAL, &serinfo) >= 0)
+ con->flags |= CON_SERIAL;
+ errno = 0;
+#else
+# if defined(KDGKBMODE)
+ if (ioctl(fd, KDGKBMODE, &mode) < 0)
+ con->flags |= CON_SERIAL;
errno = 0;
+# endif
+#endif
if (tcgetattr(fd, tio) < 0) {
- warn(_("tcgetattr failed"));
- con->flags |= CON_NOTTY;
- return;
+ int saveno = errno;
+#if defined(KDGKBMODE) || defined(TIOCGSERIAL)
+ if (con->flags & CON_SERIAL) { /* Try to recover this */
+
+# if defined(TIOCGSERIAL)
+ serinfo.flags |= ASYNC_SKIP_TEST; /* Skip test of UART */
+
+ if (ioctl(fd, TIOCSSERIAL, &serinfo) < 0)
+ goto tcgeterr;
+ if (ioctl(fd, TIOCSERCONFIG) < 0) /* Try to autoconfigure */
+ goto tcgeterr;
+ if (ioctl(fd, TIOCGSERIAL, &serinfo) < 0)
+ goto tcgeterr; /* Ouch */
+# endif
+ if (tcgetattr(fd, tio) < 0) /* Retry to get tty attributes */
+ saveno = errno;
+ }
+# if defined(TIOCGSERIAL)
+ tcgeterr:
+# endif
+ if (saveno)
+#endif
+ {
+ FILE *fcerr = fdopen(fd, "w");
+ if (fcerr) {
+ fprintf(fcerr, _("tcgetattr failed"));
+ fclose(fcerr);
+ }
+ warn(_("tcgetattr failed"));
+
+ con->flags &= ~CON_SERIAL;
+ if (saveno != EIO)
+ con->flags |= CON_NOTTY;
+ else
+ con->flags |= CON_EIO;
+
+ errno = 0;
+ return;
+ }
}
/* Handle lines other than virtual consoles here */
-#if defined(KDGKBMODE)
- if (ioctl(fd, KDGKBMODE, &mode) < 0)
+#if defined(KDGKBMODE) || defined(TIOCGSERIAL)
+ if (con->flags & CON_SERIAL)
#endif
{
speed_t ispeed, ospeed;
struct winsize ws;
errno = 0;
- /* this is a modem line */
- con->flags |= CON_SERIAL;
-
/* Flush input and output queues on modem lines */
tcflush(fd, TCIOFLUSH);
@@ -220,6 +269,8 @@ static void tcfinal(struct console *con)
struct termios *tio = &con->tio;
const int fd = con->fd;
+ if (con->flags & CON_EIO)
+ return;
if ((con->flags & CON_SERIAL) == 0) {
xsetenv("TERM", "linux", 1);
return;
@@ -557,12 +608,16 @@ err:
static void setup(struct console *con)
{
int fd = con->fd;
- const pid_t pid = getpid(), pgrp = getpgid(0), ppgrp =
- getpgid(getppid()), ttypgrp = tcgetpgrp(fd);
+ const pid_t pid = getpid(), pgrp = getpgid(0), ppgrp = getpgid(getppid());
+ pid_t ttypgrp;
if (con->flags & CON_NOTTY)
+ goto notty;
+ if (con->flags & CON_EIO)
return;
+ ttypgrp = tcgetpgrp(fd);
+
/*
* Only go through this trouble if the new
* tty doesn't fall in this process group.
@@ -585,6 +640,7 @@ static void setup(struct console *con)
ioctl(fd, TIOCSCTTY, (char *)1);
tcsetpgrp(fd, ppgrp);
}
+notty:
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
@@ -608,20 +664,25 @@ static const char *getpasswd(struct console *con)
struct termios tty;
static char pass[128], *ptr;
struct chardata *cp;
@ -22,21 +170,33 @@ index 9091caf14..7ee8f2dc7 100644
unsigned char tc;
char c, ascval;
int eightbit;
@@ -618,6 +618,7 @@ static const char *getpasswd(struct console *con)
const int fd = con->fd;
- if (con->flags & CON_NOTTY)
+ if (con->flags & CON_EIO)
goto out;
+
cp = &con->cp;
tty = con->tio;
+ tc = 0;
+ ret = pass;
tty.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
tty.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP|ISIG);
@@ -647,11 +648,12 @@ static const char *getpasswd(struct console *con)
- tc = (tcsetattr(fd, TCSAFLUSH, &tty) == 0);
+
+ if ((con->flags & CON_NOTTY) == 0)
+ tc = (tcsetattr(fd, TCSAFLUSH, &tty) == 0);
sigemptyset(&sa.sa_mask);
sa.sa_handler = alrm_handler;
@@ -647,11 +708,12 @@ static const char *getpasswd(struct console *con)
}
ret = NULL;
switch (errno) {
- case 0:
case EIO:
+ con->flags |= CON_NOTTY;
+ con->flags |= CON_EIO;
case ESRCH:
case EINVAL:
case ENOENT:
@ -44,11 +204,20 @@ index 9091caf14..7ee8f2dc7 100644
break;
default:
warn(_("cannot read %s"), con->tty);
@@ -968,10 +970,13 @@ int main(int argc, char **argv)
@@ -775,7 +837,7 @@ static void sushell(struct passwd *pwd)
#ifdef HAVE_LIBSELINUX
if (is_selinux_enabled() > 0) {
- security_context_t scon=NULL;
+ char *scon=NULL;
char *seuser=NULL;
char *level=NULL;
if (getseuserbyname("root", &seuser, &level) == 0) {
@@ -968,10 +1030,13 @@ int main(int argc, char **argv)
con = list_entry(ptr, struct console, entry);
if (con->id >= CONMAX)
break;
+ if (con->flags & CON_NOTTY)
+ if (con->flags & CON_EIO)
+ goto next;
switch ((con->pid = fork())) {
@ -58,7 +227,7 @@ index 9091caf14..7ee8f2dc7 100644
nofork:
setup(con);
while (1) {
@@ -1026,7 +1031,7 @@ int main(int argc, char **argv)
@@ -1026,7 +1091,7 @@ int main(int argc, char **argv)
default:
break;
}

6
util-linux.changes
View File

@ -1,3 +1,9 @@
-------------------------------------------------------------------
Wed Nov 4 11:07:03 UTC 2020 - Dr. Werner Fink <werner@suse.de>
- Modernize patch util-linux-sulogin4bsc1175514.patch
* Try to autoconfigure broken serial lines
-------------------------------------------------------------------
Fri Oct 30 14:03:47 UTC 2020 - Dr. Werner Fink <werner@suse.de>