This patch allows mgetty to interpret escape sequences in issue files
in the same fashion as agetty, which apparently is the model that
mingetty follows as well. The specifics, excerpted from the agetty
man page:
ISSUE ESCAPES
The issue-file (/etc/issue or the file set with the -f option) may contain certain escape codes to display
the system name, date and time etc. All escape codes consist of a backslash (\) immediately followed by one
of the letters explained below.
b Insert the baudrate of the current line. [mgetty sends a backspace]
d Insert the current date. [mgetty ignores this -- it expects upper case]
s Insert the system name, the name of the operating system.
l Insert the name of the current tty line. [mgetty ignores this]
m Insert the architecture identifier of the machine, eg. i486
n Insert the nodename of the machine, also known as the hostname.
o Insert the domainname of the machine.
r Insert the release number of the OS, eg. 1.1.9. [mgetty sends a carriage return]
t Insert the current time. [mgetty sends a horizontal tab for this]
u Insert the number of current users logged in.
U Insert the string "1 user" or "<n> users" where <n> is the number of current users logged in.
v Insert the version of the OS, eg. the build-date etc. [mgetty sends a vertical tab (?)]
--- mgetty-1.1.26/logname.c Tue Sep 1 05:56:19 1998
+++ mgetty-1.1.26/logname.c Tue Jul 24 18:11:31 2001
@@ -87,12 +87,14 @@
switch ( *ep )
{
case 'n': p[i++] = '\n'; break;
- case 'r': p[i++] = '\r'; break;
case 'g': p[i++] = '\007'; break;
+ case 'f': p[i++] = '\f'; break;
+#ifndef ESCAPE_LIKE_AGETTY
+ case 'r': p[i++] = '\r'; break;
case 'b': p[i++] = '\010'; break;
case 'v': p[i++] = '\013'; break;
- case 'f': p[i++] = '\f'; break;
case 't': p[i++] = '\t'; break;
+#endif
case 's': /* Operating System */
if ( i + strlen(un.sysname) +1 > MAX_PROMPT_LENGTH ) break;
i += strappnd( &p[i], un.sysname );
@@ -101,10 +103,16 @@
if ( i + strlen(un.machine) +1 > MAX_PROMPT_LENGTH ) break;
i += strappnd( &p[i], un.machine );
break;
+#ifdef ESCAPE_LIKE_AGETTY
+ case 'r': /* OS release */
+#endif
case 'R': /* OS release */
if ( i + strlen(un.release) +1 > MAX_PROMPT_LENGTH ) break;
i += strappnd( &p[i], un.release );
break;
+#ifdef ESCAPE_LIKE_AGETTY
+ case 'v': /* OS version */
+#endif
case 'V': /* OS version */
if ( i + strlen(un.version) +1 > MAX_PROMPT_LENGTH ) break;
i += strappnd( &p[i], un.version );
@@ -116,6 +124,12 @@
i += strappnd( &p[i], CallerId );
break;
}
+#ifdef ESCAPE_LIKE_AGETTY
+ case 'l': /* this doesn't cause */
+ /* conflicts between */
+ /* mgetty and agetty */
+ /* maybe unconditionalize? */
+#endif
case 'P': /* port name */
case 'L': /* tty line */
{
@@ -137,13 +151,16 @@
i += strappnd( &p[i], Connect);
break;
}
- case 'N': /* numer of */
+ case 'N': /* number of */
case 'U': /* users */
{
sprintf( &p[i], "%d", get_current_users() );
i = strlen(p);
break;
}
+#ifdef ESCAPE_LIKE_AGETTY
+ case 'b': /* baud rate */
+#endif
case 'S': /* port speed */
{ /* ugly, I know. */
TIO temp_t;
@@ -152,6 +169,10 @@
i = strlen(p);
}
break;
+#ifdef ESCAPE_LIKE_AGETTY
+ case 'd':
+ case 't':
+#endif
case 'D': /* fallthrough */
case 'T':
if ( i + 30 > MAX_PROMPT_LENGTH )
@@ -165,7 +186,7 @@
if ( tm == NULL ) break;
- if ( *ep == 'D' )
+ if ( ( *ep == 'D' ) || ( *ep == 'd' ) )
sprintf( &p[i], "%d/%d/%d", tm->tm_mon+1,
tm->tm_mday, tm->tm_year + 1900 );
else
--- mgetty-1.1.26/policy.h-dist Tue Jul 24 18:09:27 2001
+++ mgetty-1.1.26/policy.h-dist Tue Jul 24 18:09:27 2001
@@ -221,6 +221,14 @@
*/
#define NOLOGIN_FILE "/etc/nologin.%s"
+/* How to handle escape sequences in /etc/issue and friends.
+ *
+ * If ESCAPE_LIKE_AGETTY is defined, escape sequences (stored as backslashes
+ * followed by some character) will be interpreted in a manner consistent
+ * with agetty. Not defining ESCAPE_LIKE_AGETTY will cause the default
+ * behavior to be utilized.
+ */
+#define ESCAPE_LIKE_AGETTY
/* misc */