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Added Whistle veto file functions. Moved fcntl locking from

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locking.c to util.c
jra@cygnus.com
(This used to be commit f2d481a2d3a9adca7c94427f291a379958c3c0da)
This commit is contained in:
Samba Release Account 1996-12-10 18:03:44 +00:00
parent 9db489ea55
commit 9654c572fd
1 changed files with 225 additions and 0 deletions
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225
source3/lib/util.c
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@ -3394,4 +3394,229 @@ char *readdirname(void *p)
}
BOOL is_vetoed_name(char *name)
{
char *namelist = lp_veto_files();
char *nameptr = namelist;
char *name_end;
/* if we have no list it's obviously not vetoed */
if((nameptr == NULL ) || (*nameptr == '\0'))
return 0;
/* if the name doesn't exist in the list, it's obviously ok too */
if(strstr(namelist,name) == NULL )
return 0;
/* now, we need to find the names one by one and check them
they can contain spaces and all sorts of stuff so we
separate them with of all things '/' which can never be in a filename
I could use "" but then I have to break them all out
maybe such a routine exists somewhere?
*/
while(*nameptr)
{
if ( *nameptr == '/' )
{
nameptr++;
continue;
}
if(name_end = strchr(nameptr,'/'))
{
*name_end = 0;
}
/* a match! it's veto'd */
if(strcmp(name,nameptr) == 0)
return 1;
if(name_end == NULL)
return 0;
/* next segment please */
nameptr = name_end + 1;
}
return 0;
}
BOOL is_vetoed_path(char *name)
{
char *namelist = lp_veto_files();
char *nameptr = namelist;
char *sub;
char *name_end;
int len;
/* if we have no list it's obviously not vetoed */
if((nameptr == NULL ) || (*nameptr == '\0'))
return 0;
/* now, we need to find the names one by one and check them
they can contain spaces and all sorts of stuff so we
separate them with of all things '/' which can never be in a filename
I could use "" but then I have to break them all out
maybe such a routine exists somewhere?
*/
while(*nameptr)
{
if ( *nameptr == '/' )
{
nameptr++;
continue;
}
if(name_end = strchr(nameptr,'/'))
{
*name_end = 0;
}
len = strlen(nameptr);
sub = name;
/* If the name doesn't exist in the path, try the next name.. */
while( sub && ((sub = strstr(sub,nameptr)) != NULL))
{
/* Is it a whole component? */
if(((sub == name) || (sub[-1] == '/'))
&& ((sub[len] == '\0') || (sub[len] == '/')))
{
return 1;
}
/* skip to the next component of the path */
sub =strchr(sub,'/');
}
if(name_end == NULL)
return 0;
/* next segment please */
nameptr = name_end + 1;
}
return 0;
}
/****************************************************************************
routine to do file locking
****************************************************************************/
BOOL fcntl_lock(int fd,int op,uint32 offset,uint32 count,int type)
{
#if HAVE_FCNTL_LOCK
struct flock lock;
int ret;
#if 1
uint32 mask = 0xC0000000;
/* make sure the count is reasonable, we might kill the lockd otherwise */
count &= ~mask;
/* the offset is often strange - remove 2 of its bits if either of
the top two bits are set. Shift the top ones by two bits. This
still allows OLE2 apps to operate, but should stop lockd from
dieing */
if ((offset & mask) != 0)
offset = (offset & ~mask) | ((offset & mask) >> 2);
#else
uint32 mask = ((unsigned)1<<31);
/* interpret negative counts as large numbers */
if (count < 0)
count &= ~mask;
/* no negative offsets */
offset &= ~mask;
/* count + offset must be in range */
while ((offset < 0 || (offset + count < 0)) && mask)
{
offset &= ~mask;
mask = mask >> 1;
}
#endif
DEBUG(5,("fcntl_lock %d %d %d %d %d\n",fd,op,(int)offset,(int)count,type));
lock.l_type = type;
lock.l_whence = SEEK_SET;
lock.l_start = (int)offset;
lock.l_len = (int)count;
lock.l_pid = 0;
errno = 0;
ret = fcntl(fd,op,&lock);
if (errno != 0)
DEBUG(3,("fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
/* a lock query */
if (op == F_GETLK)
{
if ((ret != -1) &&
(lock.l_type != F_UNLCK) &&
(lock.l_pid != 0) &&
(lock.l_pid != getpid()))
{
DEBUG(3,("fd %d is locked by pid %d\n",fd,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,("lock failed at offset %d count %d op %d type %d (%s)\n",
offset,count,op,type,strerror(errno)));
/* perhaps it doesn't support this sort of locking?? */
if (errno == EINVAL)
{
DEBUG(3,("locking not supported? returning True\n"));
return(True);
}
return(False);
}
/* everything went OK */
DEBUG(5,("Lock call successful\n"));
return(True);
#else
return(False);
#endif
}
/*******************************************************************
lock a file - returning a open file descriptor or -1 on failure
The timeout is in seconds. 0 means no timeout
********************************************************************/
int file_lock(char *name,int timeout)
{
int fd = open(name,O_RDWR|O_CREAT,0666);
time_t t=0;
if (fd < 0) return(-1);
#if HAVE_FCNTL_LOCK
if (timeout) t = time(NULL);
while (!timeout || (time(NULL)-t < timeout)) {
if (fcntl_lock(fd,F_SETLK,0,1,F_WRLCK)) return(fd);
msleep(LOCK_RETRY_TIMEOUT);
}
return(-1);
#else
return(fd);
#endif
}
/*******************************************************************
unlock a file locked by file_lock
********************************************************************/
void file_unlock(int fd)
{
if (fd<0) return;
#if HAVE_FCNTL_LOCK
fcntl_lock(fd,F_SETLK,0,1,F_UNLCK);
#endif
close(fd);
}