Date: Tue, 19 Jun 2001 19:52:23 +0100 From: Nik Clayton <nik@freebsd.org> To: arch@freebsd.org Subject: [PATCH] Show login(1) how to execute programs at start up Message-ID: <20010619195223.E68877@clan.nothing-going-on.org>
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I want to make the new 'tips' fortunes the default for new users at
system startup.
During IRC discussion, a number of ways of doing this were knocked back
and forth. Several people voiced the opinion that this should be
selectable in some way when adding users, particularly when using either
sysinstall or adduser.
* Dropping the code in the standard /usr/share/skel files.
Trivial to implement. Trivial for an SA to change, difficult to
teach sysinstall/adduser about.
* Having a different set of skeleton files (or components that are
cat(1)'ed together.
Less trivial to implement, and now a lot of tools that do user
addition would need to know about it as well.
* Putting the functionality in to login.conf.
Now you can have classes of users who will or will not receive
tips at startup. Sysinstall and adduser already know enough to=20
ask you about classes when adding users. Provides additional
functionality over and above what we already have.
Attached is a small diff to login.c to do this.
With this patch, the "welcome" capability is now a comma-delimited
string of files or programs (and command line arguments). Files are
referenced as before, programs have a leading "|" symbol. To add
fortunes at startup for everybody you'd put
...
welcome=3D/etc/motd,|/usr/games/fortune freebsd-tips:\
...
A hypothetical guru class would just have
...
welcome=3D/etc/motd:\
...
instead.
This patch also removes a small bit of functionality. Prior to the
patch, if no welcome capability was set, or the file referenced in the=20
welcome capability didn't exist, or access( , F_OK) failed then=20
_PATH_MOTDFILE was automatically used. With this patch, that's only done=
=20
if the welcome capability was not set.
N
--=20
FreeBSD: The Power to Serve http://www.freebsd.org/
FreeBSD Documentation Project http://www.freebsd.org/docproj/
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Index: login.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/usr.bin/login/login.c,v
retrieving revision 1.63
diff -u -r1.63 login.c
--- login.c 2001/05/22 06:20:27 1.63
+++ login.c 2001/06/19 18:48:02
@@ -125,6 +125,7 @@
static int auth_traditional __P((void));
extern void login __P((struct utmp *));
static void usage __P((void));
+static void welcome __P((char *));
=20
#define TTYGRPNAME "tty" /* name of group to own ttys */
#define DEFAULT_BACKOFF 3
@@ -669,9 +670,9 @@
(void)printf("\n");
=20
cw =3D login_getcapstr(lc, "welcome", NULL, NULL);
- if (cw =3D=3D NULL || access(cw, F_OK) !=3D 0)
+ if (cw =3D=3D NULL)
cw =3D _PATH_MOTDFILE;
- motd(cw);
+ welcome(cw);
=20
cw =3D getenv("MAIL"); /* $MAIL may have been set by class */
if (cw !=3D NULL) {
@@ -938,6 +939,24 @@
int signo;
{
motdinterrupt =3D 1;
+}
+
+static void
+welcome(w)
+ char *w;
+{
+ char *p;
+
+ p =3D strtok(w, ",");
+ if (p =3D=3D NULL)
+ return;
+ do {
+ if (*p =3D=3D '|')=20
+ system(++p);
+ else=20
+ if (access(p, F_OK) =3D=3D 0)
+ motd(p);
+ } while ((p =3D strtok(NULL, ",")) !=3D NULL);
}
=20
void
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