Author: nwhitehorn
Date: Mon Jan 20 18:15:06 2014
New Revision: 260913
URL: http://svnweb.freebsd.org/changeset/base/260913
Log:
Add a new flag to /etc/ttys: onifconsole. This is equivalent to "on" if the
device is an active kernel console and "off" otherwise. This is designed to
allow serial-booting x86 systems to provide a login prompt on the serial line
by default without providing one on all systems by default.
Comments and suggestions by: grehan, dteske, jilles
MFC after: 1 month
Modified:
head/include/ttyent.h
head/lib/libc/gen/getttyent.c
head/libexec/getty/ttys.5
Modified: head/include/ttyent.h
==============================================================================
--- head/include/ttyent.h Mon Jan 20 17:55:22 2014 (r260912)
+++ head/include/ttyent.h Mon Jan 20 18:15:06 2014 (r260913)
@@ -37,6 +37,7 @@
#define _TTYS_OFF "off"
#define _TTYS_ON "on"
+#define _TTYS_ONIFCONSOLE "onifconsole"
#define _TTYS_SECURE "secure"
#define _TTYS_INSECURE "insecure"
#define _TTYS_WINDOW "window"
Modified: head/lib/libc/gen/getttyent.c
==============================================================================
--- head/lib/libc/gen/getttyent.c Mon Jan 20 17:55:22 2014
(r260912)
+++ head/lib/libc/gen/getttyent.c Mon Jan 20 18:15:06 2014
(r260913)
@@ -39,6 +39,9 @@ __FBSDID("$FreeBSD$");
#include <ctype.h>
#include <string.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+
static char zapchar;
static FILE *tf;
static size_t lbsize;
@@ -64,6 +67,36 @@ getttynam(const char *tty)
return (t);
}
+static int
+auto_tty_status(const char *ty_name)
+{
+ size_t len;
+ char *buf, *cons, *nextcons;
+
+ /* Check if this is an enabled kernel console line */
+ buf = NULL;
+ if (sysctlbyname("kern.console", NULL, &len, NULL, 0) == -1)
+ return (0); /* Errors mean don't enable */
+ buf = malloc(len);
+ if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1)
+ goto done;
+
+ if ((cons = strchr(buf, '/')) == NULL)
+ goto done;
+ *cons = '\0';
+ nextcons = buf;
+ while ((cons = strsep(&nextcons, ",")) != NULL && strlen(cons) != 0) {
+ if (strcmp(cons, ty_name) == 0) {
+ free(buf);
+ return (TTY_ON);
+ }
+ }
+
+done:
+ free(buf);
+ return (0);
+}
+
struct ttyent *
getttyent(void)
{
@@ -126,6 +159,8 @@ getttyent(void)
tty.ty_status &= ~TTY_ON;
else if (scmp(_TTYS_ON))
tty.ty_status |= TTY_ON;
+ else if (scmp(_TTYS_ONIFCONSOLE))
+ tty.ty_status |= auto_tty_status(tty.ty_name);
else if (scmp(_TTYS_SECURE))
tty.ty_status |= TTY_SECURE;
else if (scmp(_TTYS_INSECURE))
Modified: head/libexec/getty/ttys.5
==============================================================================
--- head/libexec/getty/ttys.5 Mon Jan 20 17:55:22 2014 (r260912)
+++ head/libexec/getty/ttys.5 Mon Jan 20 18:15:06 2014 (r260913)
@@ -102,8 +102,11 @@ ttys as a group.
.Pp
As flag values, the strings ``on'' and ``off'' specify that
.Xr init 8
-should (should not) execute the command given in the second field,
-while ``secure'' (if ``on'' is also specified) allows users with a
+should (should not) execute the command given in the second field.
+``onifconsole'' will cause this line to be enabled if and only if it is
+an active kernel console device (it is equivalent to ``on'' in this
+case).
+The flag ``secure'' (if the console is enabled) allows users with a
uid of 0 to login on
this line.
The flag ``dialin'' indicates that a tty entry describes a dialin
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