Date: Sun, 21 Apr 2002 00:42:29 +0200 From: Oswald Buddenhagen <ossi@kde.org> To: current@freebsd.org Subject: uthread_init.c again Message-ID: <20020420224229.GA13290@ugly.homeip.net>
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hello,
this is again about the _thread_kern_pipe issue raised a few days ago.
thinking about it again, it's nonsense to create any pid-specific
workarounds by creating fake stdio. the solution is straightforward;
patch attached (completely untested).
note, that the open() wrapper (and other calls that create fds) need to
check, if the newly created fd is a stdio one and adjust
_pthread_stdio_flags - at least this is my understanding of this voodoo.
but then, i don't have the faintest idea of what i'm talking about. :)
greetings
ps: flames must be explicitly cc'd to me. >:)
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The problem with making software idiot-proof is that idiots are so clever.
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Index: uthread_init.c
===================================================================
RCS file: /home/ncvs/src/lib/libc_r/uthread/uthread_init.c,v
retrieving revision 1.38
diff -u -r1.38 uthread_init.c
--- uthread_init.c 19 Mar 2002 22:58:56 -0000 1.38
+++ uthread_init.c 20 Apr 2002 22:42:19 -0000
@@ -173,31 +173,6 @@
if ((references[0] == NULL) || (libgcc_references[0] == NULL))
PANIC("Failed loading mandatory references in _thread_init");
- /*
- * Check for the special case of this process running as
- * or in place of init as pid = 1:
- */
- if (getpid() == 1) {
- /*
- * Setup a new session for this process which is
- * assumed to be running as root.
- */
- if (setsid() == -1)
- PANIC("Can't set session ID");
- if (revoke(_PATH_CONSOLE) != 0)
- PANIC("Can't revoke console");
- if ((fd = __sys_open(_PATH_CONSOLE, O_RDWR)) < 0)
- PANIC("Can't open console");
- if (setlogin("root") == -1)
- PANIC("Can't set login to root");
- if (__sys_ioctl(fd,TIOCSCTTY, (char *) NULL) == -1)
- PANIC("Can't set controlling terminal");
- if (__sys_dup2(fd,0) == -1 ||
- __sys_dup2(fd,1) == -1 ||
- __sys_dup2(fd,2) == -1)
- PANIC("Can't dup2");
- }
-
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
if (((_pthread_stdio_flags[i] =
@@ -213,6 +188,16 @@
/* Cannot create pipe, so abort: */
PANIC("Cannot create kernel pipe");
}
+ /*
+ * Make sure the pipe does not get in the way of stdio:
+ */
+ for (i = 0; i < 2; i++)
+ if (_thread_kern_pipe[i] < 3) {
+ if ((fd = __sys_fcntl(_thread_kern_pipe[i], F_DUPFD, 3)) == -1)
+ PANIC("Cannot create kernel pipe");
+ __sys_close(_thread_kern_pipe[i]);
+ _thread_kern_pipe[i] = fd;
+ }
/* Get the flags for the read pipe: */
else if ((flags = __sys_fcntl(_thread_kern_pipe[0], F_GETFL, NULL)) == -1) {
/* Abort this application: */
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