[101] in The Cryptographic File System users list
cmkdir doesn't terminate under linux
daemon@ATHENA.MIT.EDU (Charles Karney)
Sun Sep 13 22:33:29 1998
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Date: Sun, 13 Sep 1998 22:27:26 -0400 (EDT)
Message-Id: <199809140227.WAA26702@orion.pppl.gov>
From: Charles Karney <karney@pppl.gov>
To: cfs-users@research.att.com
Subject: cmkdir doesn't terminate under linux
Reply-to: karney@princeton.edu
Sender: owner-cfs-users@research.att.com
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Configuration: cfs 1.4.0 beta2, Redhat Linux 5.0.
(Question: has cfs 1.4.0 been released yet?)
Problem: cmkdir gets stuck in the alarm routine.
The last bit of an strace gives:
write(2, "\n", 1) = 1
ioctl(3, SNDCTL_TMR_CONTINUE, {B9600 opost isig icanon echo ...}) = 0
sigaction(SIGINT, {SIG_DFL}, {SIG_IGN}) = 0
close(3) = 0
getitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}) = 0
sigaction(SIGALRM, {SIG_IGN}, {SIG_DFL}) = 0
sigaction(SIGALRM, {0x804d618, [], SA_NOMASK|0x4a804}, {SIG_IGN}) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 16665}}, NULL) = 0
--- SIGALRM (Alarm clock) ---
sigaction(SIGALRM, {0x804d618, [], 0}, {0x804d618, [], SA_STACK|0x5188c}) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 16665}}, NULL) = 0
Fix: use Linux's /dev/random in raw_truerand:
--- truerand.c~ Sun Dec 7 00:16:36 1997
+++ truerand.c Sun Sep 13 21:38:06 1998
@@ -88,6 +88,7 @@
#include <sys/time.h>
#include <math.h>
#include <stdio.h>
+#include <fcntl.h>
static jmp_buf env;
static unsigned count;
@@ -134,27 +135,11 @@
unsigned long
raw_truerand()
{
- void (*oldalrm)();
- struct itimerval it;
- unsigned long counts[12];
- unsigned char *qshs();
- unsigned char *r;
unsigned long buf;
- int i;
-
- getitimer(ITIMER_REAL, &it);
- oldalrm = signal(SIGALRM, SIG_IGN);
- for (i=0; i<12; i++) {
- counts[i]=0;
- while ((counts[i] += roulette()) < 512)
- ;
- }
- signal(SIGALRM, oldalrm);
- setitimer(ITIMER_REAL, &it, NULL);
-
- r = qshs(counts,sizeof(counts));
- buf = *((unsigned long *) r);
-
+ int fd;
+ fd=open("/dev/random",O_RDONLY);
+ read(fd,&buf,4);
+ close(fd);
return buf;
}
Other information:
cmkdir from cfs 1.4.0 on Solaris 2.5.1 works OK.
cmkdir from cfs 1.3.3 on Redhat 5.0 works OK.
--
Charles Karney
Plasma Physics Laboratory E-mail: Karney@Princeton.EDU
Princeton University Phone: +1 609 243 2607
Princeton, NJ 08543-0451 FAX: +1 609 243 3438
