Re: [binc] Unable to aquire mailbox scan lock ./bincimap-scan-lock, Permission denied

[Jason Parsons]

It's garbage. From open(2):
I think it's a bitmap of all of the flags.  But I'm a bit confused by 
the truss output.

 mode  must  be specified when O_CREAT is in the flags, and
       is ignored otherwise.
You noted that my previous email included the patch that causes a lock 
file to be created for me?  Specifying flags 0600 seems to have done 
the right thing in this case.

Here's something interesting.  Running this test program:

#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
int main() {
  if (open("/tmp/lockfile",O_WRONLY|O_CREAT|O_EXCL, 017777763300) == 
-1) {
    perror("Failed on /tmp with flags 017777763300: ");
  } else {
    printf("Worked on /tmp with flags 017777763300\n");
  }

  if (open("/home/vqmail/lockfile",O_WRONLY|O_CREAT|O_EXCL, 
017777763300) == -1) {
    perror("Failed on /home/vqmail with flags 017777763300: ");
  } else {
    printf("Worked on /home/vqmail with flags 017777763300\n");
  }

  if (open("/home/vqmail/lockfile",O_WRONLY|O_CREAT|O_EXCL, 0600) == 
-1) {
    perror("Failed on /home/vqmail with flags 0600: ");
  } else {
    printf("Worked on /home/vqmail with flags 0600\n");
  }
}
Produces this output:
 Worked on /tmp with flags 017777763300
 Failed on /home/vqmail with flags 017777763300: : Permission denied
 Worked on /home/vqmail with flags 0600
/home/vqmail is NFS mounted.  Those flags are doing something that NFS 
doesn't like (some locking problem?)

Unrelated question, I note that cache files aren't created for IMAP
folders other than the main folder.  Is this by design?  I see an
attempt to open a cache, but one is not created.
Perhaps this problem is related. What does the strace say here?
It attempts a stat(), attempts an open(), fails with ENOENT, and 
doesn't try to create a cache.  Here's a truss after removing the inbox 
cache, showing the inbox cache being created and the folder caches not 
being created (gathered with "grep cache outfile"):

19290:  open("./bincimap-cache", O_RDONLY)              Err#2 ENOENT
19290:  lstat("./bincimap-cachengaqRL", 0xFFFFFFFF7FFFDF60) Err#2 ENOENT
19290:  open("./bincimap-cachengaqRL", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
19290:  rename("./bincimap-cachengaqRL", "./bincimap-cache") = 0
19294:  stat(".apache/bincimap-cache", 0xFFFFFFFF7FFFED80) Err#2 ENOENT
19294:  open(".apache/bincimap-cache", O_RDONLY)        Err#2 ENOENT
Thanks.
 - Jason
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