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authorJeremy Allison <jra@samba.org>2006-04-10 15:33:04 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 11:15:57 -0500
commit22dbd67708f1651a2341d70ce576fac360affccf (patch)
tree83b1bb601be996716bd4e8d3ae79e94df056df2e /source3/lib
parent0f985dcb1978afd4b383116f01b3acf65c39ecd7 (diff)
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r15018: Merge Volker's ipc/trans2/nttrans changes over
into 3.0. Also merge the new POSIX lock code - this is not enabled unless -DDEVELOPER is defined. This doesn't yet map onto underlying system POSIX locks. Updates vfs to allow lock queries. Jeremy. (This used to be commit 08e52ead03304ff04229e1bfe544ff40e2564fc7)
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/util.c61
1 files changed, 41 insertions, 20 deletions
diff --git a/source3/lib/util.c b/source3/lib/util.c
index bfc5eb2a8d..87f15b8759 100644
--- a/source3/lib/util.c
+++ b/source3/lib/util.c
@@ -1876,6 +1876,7 @@ void free_namearray(name_compare_entry *name_array)
/****************************************************************************
Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
is dealt with in posix.c
+ Returns True if the lock was granted, False otherwise.
****************************************************************************/
BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
@@ -1893,34 +1894,54 @@ BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
ret = sys_fcntl_ptr(fd,op,&lock);
- if (ret == -1 && errno != 0)
- DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
-
- /* a lock query - return True if this region is locked, False if not locked. */
- if (op == SMB_F_GETLK) {
- if ((ret != -1) &&
- (lock.l_type != F_UNLCK) &&
- (lock.l_pid != 0) &&
- (lock.l_pid != sys_getpid())) {
- DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
- return(True);
- }
-
- /* it must be not locked or locked by me */
- return(False);
- }
-
- /* a lock set or unset */
if (ret == -1) {
DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
(double)offset,(double)count,op,type,strerror(errno)));
- return(False);
+ return False;
}
/* everything went OK */
DEBUG(8,("fcntl_lock: Lock call successful\n"));
- return(True);
+ return True;
+}
+
+/****************************************************************************
+ Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
+ is dealt with in posix.c
+ Returns True if we have information regarding this lock region (and returns
+ F_UNLCK in *ptype if the region is unlocked). False if the call failed.
+****************************************************************************/
+
+BOOL fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
+{
+ SMB_STRUCT_FLOCK lock;
+ int ret;
+
+ DEBUG(8,("fcntl_getlock %d %.0f %.0f %d\n",fd,(double)*poffset,(double)*pcount,*ptype));
+
+ lock.l_type = *ptype;
+ lock.l_whence = SEEK_SET;
+ lock.l_start = *poffset;
+ lock.l_len = *pcount;
+ lock.l_pid = 0;
+
+ ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
+
+ if (ret == -1) {
+ DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
+ (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
+ return False;
+ }
+
+ *ptype = lock.l_type;
+ *poffset = lock.l_start;
+ *pcount = lock.l_len;
+ *ppid = lock.l_pid;
+
+ DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
+ fd, (int)lock.l_type, (unsigned int)lock.l_pid));
+ return True;
}
#undef DBGC_CLASS