first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 1000 insertions, 0 deletions

diff --git a/source4/lib/util.c b/source4/lib/util.c
new file mode 100644
index 0000000000..64e3dfe88c
--- /dev/null
+++ b/source4/lib/util.c
@@ -0,0 +1,1000 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Jeremy Allison 2001-2002
+   Copyright (C) Simo Sorce 2001
+   Copyright (C) Anthony Liguori 2003
+   Copyright (C) James J Myers 2003
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
+#ifdef WITH_NISPLUS_HOME
+#ifdef BROKEN_NISPLUS_INCLUDE_FILES
+/*
+ * The following lines are needed due to buggy include files
+ * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
+ * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
+ * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
+ * an enum in /usr/include/rpcsvc/nis.h.
+ */
+
+#if defined(GROUP)
+#undef GROUP
+#endif
+
+#if defined(GROUP_OBJ)
+#undef GROUP_OBJ
+#endif
+
+#endif /* BROKEN_NISPLUS_INCLUDE_FILES */
+
+#include <rpcsvc/nis.h>
+
+#else /* !WITH_NISPLUS_HOME */
+
+#include "rpcsvc/ypclnt.h"
+
+#endif /* WITH_NISPLUS_HOME */
+#endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
+
+
+/**************************************************************************n
+ Find a suitable temporary directory. The result should be copied immediately
+ as it may be overwritten by a subsequent call.
+****************************************************************************/
+
+const char *tmpdir(void)
+{
+	char *p;
+	if ((p = getenv("TMPDIR")))
+		return p;
+	return "/tmp";
+}
+
+/****************************************************************************
+ Determine whether we are in the specified group.
+****************************************************************************/
+
+BOOL in_group(gid_t group, gid_t current_gid, int ngroups, const gid_t *groups)
+{
+	int i;
+
+	if (group == current_gid)
+		return(True);
+
+	for (i=0;i<ngroups;i++)
+		if (group == groups[i])
+			return(True);
+
+	return(False);
+}
+
+/*******************************************************************
+ Check if a file exists - call vfs_file_exist for samba files.
+********************************************************************/
+
+BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
+{
+	SMB_STRUCT_STAT st;
+	if (!sbuf)
+		sbuf = &st;
+  
+	if (sys_stat(fname,sbuf) != 0) 
+		return(False);
+
+	return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
+}
+
+/*******************************************************************
+ Check a files mod time.
+********************************************************************/
+
+time_t file_modtime(const char *fname)
+{
+	SMB_STRUCT_STAT st;
+  
+	if (sys_stat(fname,&st) != 0) 
+		return(0);
+
+	return(st.st_mtime);
+}
+
+/*******************************************************************
+ Check if a directory exists.
+********************************************************************/
+
+BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
+{
+	SMB_STRUCT_STAT st2;
+	BOOL ret;
+
+	if (!st)
+		st = &st2;
+
+	if (sys_stat(dname,st) != 0) 
+		return(False);
+
+	ret = S_ISDIR(st->st_mode);
+	if(!ret)
+		errno = ENOTDIR;
+	return ret;
+}
+
+/*******************************************************************
+ Returns the size in bytes of the named file.
+********************************************************************/
+SMB_OFF_T get_file_size(char *file_name)
+{
+	SMB_STRUCT_STAT buf;
+	buf.st_size = 0;
+	if(sys_stat(file_name,&buf) != 0)
+		return (SMB_OFF_T)-1;
+	return(buf.st_size);
+}
+
+/*******************************************************************
+ Close the low 3 fd's and open dev/null in their place.
+********************************************************************/
+void close_low_fds(BOOL stderr_too)
+{
+#ifndef VALGRIND
+	int fd;
+	int i;
+
+	close(0);
+	close(1); 
+
+	if (stderr_too)
+		close(2);
+
+	/* try and use up these file descriptors, so silly
+		library routines writing to stdout etc won't cause havoc */
+	for (i=0;i<3;i++) {
+		if (i == 2 && !stderr_too)
+			continue;
+
+		fd = sys_open("/dev/null",O_RDWR,0);
+		if (fd < 0)
+			fd = sys_open("/dev/null",O_WRONLY,0);
+		if (fd < 0) {
+			DEBUG(0,("Can't open /dev/null\n"));
+			return;
+		}
+		if (fd != i) {
+			DEBUG(0,("Didn't get file descriptor %d\n",i));
+			return;
+		}
+	}
+#endif
+}
+
+/****************************************************************************
+ Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
+ else
+  if SYSV use O_NDELAY
+  if BSD use FNDELAY
+****************************************************************************/
+
+int set_blocking(int fd, BOOL set)
+{
+	int val;
+#ifdef O_NONBLOCK
+#define FLAG_TO_SET O_NONBLOCK
+#else
+#ifdef SYSV
+#define FLAG_TO_SET O_NDELAY
+#else /* BSD */
+#define FLAG_TO_SET FNDELAY
+#endif
+#endif
+
+	if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
+		return -1;
+	if(set) /* Turn blocking on - ie. clear nonblock flag */
+		val &= ~FLAG_TO_SET;
+	else
+		val |= FLAG_TO_SET;
+	return sys_fcntl_long( fd, F_SETFL, val);
+#undef FLAG_TO_SET
+}
+
+
+/*******************************************************************
+ Sleep for a specified number of milliseconds.
+********************************************************************/
+
+void msleep(unsigned int t)
+{
+	struct timeval tval;  
+
+	tval.tv_sec = t/1000;
+	tval.tv_usec = 1000*(t%1000);
+	/* this should be the real select - do NOT replace
+	   with sys_select() */
+	select(0,NULL,NULL,NULL,&tval);
+}
+
+/****************************************************************************
+ Become a daemon, discarding the controlling terminal.
+****************************************************************************/
+
+void become_daemon(BOOL Fork)
+{
+	if (Fork) {
+		if (fork()) {
+			_exit(0);
+		}
+	}
+
+  /* detach from the terminal */
+#ifdef HAVE_SETSID
+	setsid();
+#elif defined(TIOCNOTTY)
+	{
+		int i = sys_open("/dev/tty", O_RDWR, 0);
+		if (i != -1) {
+			ioctl(i, (int) TIOCNOTTY, (char *)0);      
+			close(i);
+		}
+	}
+#endif /* HAVE_SETSID */
+
+	/* Close fd's 0,1,2. Needed if started by rsh */
+	close_low_fds(False);  /* Don't close stderr, let the debug system
+				  attach it to the logfile */
+}
+
+
+/****************************************************************************
+ Expand a pointer to be a particular size.
+****************************************************************************/
+
+void *Realloc(void *p,size_t size)
+{
+	void *ret=NULL;
+
+	if (size == 0) {
+		SAFE_FREE(p);
+		DEBUG(5,("Realloc asked for 0 bytes\n"));
+		return NULL;
+	}
+
+	if (!p)
+		ret = (void *)malloc(size);
+	else
+		ret = (void *)realloc(p,size);
+
+	if (!ret)
+		DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
+
+	return(ret);
+}
+
+/****************************************************************************
+ Free memory, checks for NULL.
+ Use directly SAFE_FREE()
+ Exists only because we need to pass a function pointer somewhere --SSS
+****************************************************************************/
+
+void safe_free(void *p)
+{
+	SAFE_FREE(p);
+}
+
+
+/*
+  see if a string matches either our primary or one of our secondary 
+  netbios aliases. do a case insensitive match
+*/
+BOOL is_myname(const char *name)
+{
+	const char **aliases;
+	int i;
+
+	if (strcasecmp(name, lp_netbios_name()) == 0) {
+		return True;
+	}
+
+	aliases = lp_netbios_aliases();
+	for (i=0; aliases && aliases[i]; i++) {
+		if (strcasecmp(name, aliases[i]) == 0) {
+			return True;
+		}
+	}
+
+	return False;
+}
+
+
+/****************************************************************************
+ Get my own name, return in malloc'ed storage.
+****************************************************************************/
+
+char* get_myname(void)
+{
+	char *hostname;
+	const int host_name_max = 255;
+	char *p;
+
+	hostname = malloc(host_name_max+1);
+	*hostname = 0;
+
+	/* get my host name */
+	if (gethostname(hostname, host_name_max+1) == -1) {
+		DEBUG(0,("gethostname failed\n"));
+		return NULL;
+	} 
+
+	/* Ensure null termination. */
+	hostname[host_name_max] = '\0';
+
+	/* split off any parts after an initial . */
+	p = strchr_m(hostname,'.');
+
+	if (p)
+		*p = 0;
+	
+	return hostname;
+}
+
+/****************************************************************************
+ Get my own name, including domain.
+****************************************************************************/
+
+BOOL get_myfullname(char *my_name)
+{
+	pstring hostname;
+
+	*hostname = 0;
+
+	/* get my host name */
+	if (gethostname(hostname, sizeof(hostname)) == -1) {
+		DEBUG(0,("gethostname failed\n"));
+		return False;
+	} 
+
+	/* Ensure null termination. */
+	hostname[sizeof(hostname)-1] = '\0';
+
+	if (my_name)
+		fstrcpy(my_name, hostname);
+	return True;
+}
+
+/****************************************************************************
+ Get my own domain name.
+****************************************************************************/
+
+BOOL get_mydomname(fstring my_domname)
+{
+	pstring hostname;
+	char *p;
+
+	*hostname = 0;
+	/* get my host name */
+	if (gethostname(hostname, sizeof(hostname)) == -1) {
+		DEBUG(0,("gethostname failed\n"));
+		return False;
+	} 
+
+	/* Ensure null termination. */
+	hostname[sizeof(hostname)-1] = '\0';
+
+	p = strchr_m(hostname, '.');
+
+	if (!p)
+		return False;
+
+	p++;
+	
+	if (my_domname)
+		fstrcpy(my_domname, p);
+
+	return True;
+}
+
+/****************************************************************************
+ Interpret a protocol description string, with a default.
+****************************************************************************/
+
+int interpret_protocol(char *str,int def)
+{
+	if (strequal(str,"NT1"))
+		return(PROTOCOL_NT1);
+	if (strequal(str,"LANMAN2"))
+		return(PROTOCOL_LANMAN2);
+	if (strequal(str,"LANMAN1"))
+		return(PROTOCOL_LANMAN1);
+	if (strequal(str,"CORE"))
+		return(PROTOCOL_CORE);
+	if (strequal(str,"COREPLUS"))
+		return(PROTOCOL_COREPLUS);
+	if (strequal(str,"CORE+"))
+		return(PROTOCOL_COREPLUS);
+  
+	DEBUG(0,("Unrecognised protocol level %s\n",str));
+  
+	return(def);
+}
+
+/****************************************************************************
+ Return true if a string could be a pure IP address.
+****************************************************************************/
+
+BOOL is_ipaddress(const char *str)
+{
+	BOOL pure_address = True;
+	int i;
+  
+	for (i=0; pure_address && str[i]; i++)
+		if (!(isdigit((int)str[i]) || str[i] == '.'))
+			pure_address = False;
+
+	/* Check that a pure number is not misinterpreted as an IP */
+	pure_address = pure_address && (strchr_m(str, '.') != NULL);
+
+	return pure_address;
+}
+
+/****************************************************************************
+ Interpret an internet address or name into an IP address in 4 byte form.
+****************************************************************************/
+
+uint32 interpret_addr(const char *str)
+{
+	struct hostent *hp;
+	uint32 res;
+
+	if (strcmp(str,"0.0.0.0") == 0)
+		return(0);
+	if (strcmp(str,"255.255.255.255") == 0)
+		return(0xFFFFFFFF);
+
+  /* if it's in the form of an IP address then get the lib to interpret it */
+	if (is_ipaddress(str)) {
+		res = inet_addr(str);
+	} else {
+		/* otherwise assume it's a network name of some sort and use 
+			sys_gethostbyname */
+		if ((hp = sys_gethostbyname(str)) == 0) {
+			DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
+			return 0;
+		}
+
+		if(hp->h_addr == NULL) {
+			DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
+			return 0;
+		}
+		putip((char *)&res,(char *)hp->h_addr);
+	}
+
+	if (res == (uint32)-1)
+		return(0);
+
+	return(res);
+}
+
+/*******************************************************************
+ A convenient addition to interpret_addr().
+******************************************************************/
+
+struct in_addr *interpret_addr2(TALLOC_CTX *mem_ctx, const char *str)
+{
+	struct in_addr *ret;
+	uint32 a = interpret_addr(str);
+	
+	ret = talloc(mem_ctx, sizeof(struct in_addr));
+	if (!ret) return NULL;
+	ret->s_addr = a;
+	return(ret);
+}
+
+/*******************************************************************
+ Check if an IP is the 0.0.0.0.
+******************************************************************/
+
+BOOL is_zero_ip(struct in_addr ip)
+{
+	uint32 a;
+	putip((char *)&a,(char *)&ip);
+	return(a == 0);
+}
+
+/*******************************************************************
+ Set an IP to 0.0.0.0.
+******************************************************************/
+
+void zero_ip(struct in_addr *ip)
+{
+	*ip = inet_makeaddr(0,0);
+	return;
+}
+
+
+/*******************************************************************
+ Are two IPs on the same subnet?
+********************************************************************/
+
+BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
+{
+	uint32 net1,net2,nmask;
+
+	nmask = ntohl(mask.s_addr);
+	net1  = ntohl(ip1.s_addr);
+	net2  = ntohl(ip2.s_addr);
+            
+	return((net1 & nmask) == (net2 & nmask));
+}
+
+
+/****************************************************************************
+ Check if a process exists. Does this work on all unixes?
+****************************************************************************/
+
+BOOL process_exists(pid_t pid)
+{
+	/* Doing kill with a non-positive pid causes messages to be
+	 * sent to places we don't want. */
+	SMB_ASSERT(pid > 0);
+	return(kill(pid,0) == 0 || errno != ESRCH);
+}
+
+/*******************************************************************
+ Convert a gid into a group name.
+********************************************************************/
+
+char *gidtoname(TALLOC_CTX *mem_ctx, gid_t gid)
+{
+	char *name;
+	struct group *grp;
+
+	grp = getgrgid(gid);
+	if (grp)
+		return(grp->gr_name);
+	name = talloc_asprintf(mem_ctx, "%d",(int)gid);
+	return(name);
+}
+
+
+/*******************************************************************
+ Convert a name to a gid_t if possible. Return -1 if not a group. 
+********************************************************************/
+
+gid_t nametogid(const char *name)
+{
+	struct group *grp;
+	char *p;
+	gid_t g;
+
+	g = (gid_t)strtol(name, &p, 0);
+	if ((p != name) && (*p == '\0'))
+		return g;
+
+	grp = sys_getgrnam(name);
+	if (grp)
+		return(grp->gr_gid);
+	return (gid_t)-1;
+}
+
+/*******************************************************************
+ Something really nasty happened - panic !
+********************************************************************/
+
+void smb_panic(const char *why)
+{
+	char *cmd = lp_panic_action();
+	int result;
+
+	if (cmd && *cmd) {
+		DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
+		result = system(cmd);
+
+		if (result == -1)
+			DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
+				  strerror(errno)));
+		else
+			DEBUG(0, ("smb_panic(): action returned status %d\n",
+				  WEXITSTATUS(result)));
+	}
+	DEBUG(0,("PANIC: %s\n", why));
+	abort();
+}
+
+/****************************************************************************
+ Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
+ is dealt with in posix.c
+****************************************************************************/
+
+BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
+{
+	SMB_STRUCT_FLOCK lock;
+	int ret;
+
+	DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
+
+	lock.l_type = type;
+	lock.l_whence = SEEK_SET;
+	lock.l_start = offset;
+	lock.l_len = count;
+	lock.l_pid = 0;
+
+	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 */
+	if (op == SMB_F_GETLK) {
+		if ((ret != -1) &&
+				(lock.l_type != F_UNLCK) && 
+				(lock.l_pid != 0) && 
+				(lock.l_pid != 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);
+	}
+
+	/* everything went OK */
+	DEBUG(8,("fcntl_lock: Lock call successful\n"));
+
+	return(True);
+}
+
+/*******************************************************************
+ Set the remote_arch string based on an enum. This is used in places
+where we desperately need to distinguish client type. 
+********************************************************************/
+void set_remote_arch(struct server_context *smb, enum remote_arch_types type)
+{
+	const char *arch;
+
+	smb->negotiate.ra_type = type;
+	switch (type) {
+	case RA_WFWG:
+		arch = "WfWg";
+		return;
+	case RA_OS2:
+		arch = "OS2";
+		return;
+	case RA_WIN95:
+		arch = "Win95";
+		return;
+	case RA_WINNT:
+		arch = "WinNT";
+		return;
+	case RA_WIN2K:
+		arch = "Win2K";
+		return;
+	case RA_WINXP:
+		arch = "WinXP";
+		return;
+	case RA_SAMBA:
+		arch = "Samba";
+		return;
+	default:
+		smb->negotiate.ra_type = RA_UNKNOWN;
+		arch = "UNKNOWN";
+		break;
+	}
+
+	sub_set_remote_arch(arch);
+}
+
+
+void print_asc(int level, const unsigned char *buf,int len)
+{
+	int i;
+	for (i=0;i<len;i++)
+		DEBUGADD(level,("%c", isprint(buf[i])?buf[i]:'.'));
+}
+
+void dump_data(int level, const char *buf1,int len)
+{
+	const unsigned char *buf = (const unsigned char *)buf1;
+	int i=0;
+	if (len<=0) return;
+
+	if (!DEBUGLVL(level)) return;
+	
+	DEBUGADD(level,("[%03X] ",i));
+	for (i=0;i<len;) {
+		DEBUGADD(level,("%02X ",(int)buf[i]));
+		i++;
+		if (i%8 == 0) DEBUGADD(level,(" "));
+		if (i%16 == 0) {      
+			print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
+			print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
+			if (i<len) DEBUGADD(level,("[%03X] ",i));
+		}
+	}
+	if (i%16) {
+		int n;
+		n = 16 - (i%16);
+		DEBUGADD(level,(" "));
+		if (n>8) DEBUGADD(level,(" "));
+		while (n--) DEBUGADD(level,("   "));
+		n = MIN(8,i%16);
+		print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
+		n = (i%16) - n;
+		if (n>0) print_asc(level,&buf[i-n],n); 
+		DEBUGADD(level,("\n"));    
+	}	
+}
+
+/*****************************************************************
+ Possibly replace mkstemp if it is broken.
+*****************************************************************/  
+
+int smb_mkstemp(char *template)
+{
+#if HAVE_SECURE_MKSTEMP
+	return mkstemp(template);
+#else
+	/* have a reasonable go at emulating it. Hope that
+	   the system mktemp() isn't completly hopeless */
+	char *p = mktemp(template);
+	if (!p)
+		return -1;
+	return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
+#endif
+}
+
+/*****************************************************************
+ malloc that aborts with smb_panic on fail or zero size.
+ *****************************************************************/  
+
+void *smb_xmalloc(size_t size)
+{
+	void *p;
+	if (size == 0)
+		smb_panic("smb_xmalloc: called with zero size.\n");
+	if ((p = malloc(size)) == NULL)
+		smb_panic("smb_xmalloc: malloc fail.\n");
+	return p;
+}
+
+/**
+ Memdup with smb_panic on fail.
+**/
+
+void *smb_xmemdup(const void *p, size_t size)
+{
+	void *p2;
+	p2 = smb_xmalloc(size);
+	memcpy(p2, p, size);
+	return p2;
+}
+
+/**
+ strdup that aborts on malloc fail.
+**/
+
+char *smb_xstrdup(const char *s)
+{
+	char *s1 = strdup(s);
+	if (!s1)
+		smb_panic("smb_xstrdup: malloc fail\n");
+	return s1;
+}
+
+
+/*
+  vasprintf that aborts on malloc fail
+*/
+
+ int smb_xvasprintf(char **ptr, const char *format, va_list ap)
+{
+	int n;
+	va_list ap2;
+
+	VA_COPY(ap2, ap);
+
+	n = vasprintf(ptr, format, ap2);
+	if (n == -1 || ! *ptr)
+		smb_panic("smb_xvasprintf: out of memory");
+	return n;
+}
+
+/*****************************************************************
+ Like strdup but for memory.
+*****************************************************************/  
+
+void *memdup(const void *p, size_t size)
+{
+	void *p2;
+	if (size == 0)
+		return NULL;
+	p2 = malloc(size);
+	if (!p2)
+		return NULL;
+	memcpy(p2, p, size);
+	return p2;
+}
+
+/*****************************************************************
+ Get local hostname and cache result.
+*****************************************************************/  
+
+char *myhostname(TALLOC_CTX *mem_ctx)
+{
+	char *myname, *ret;
+	myname = get_myname();
+	ret = talloc_strdup(mem_ctx, myname);
+	free(myname);
+	return ret;
+
+}
+
+/*****************************************************************
+ A useful function for returning a path in the Samba lock directory.
+*****************************************************************/  
+
+char *lock_path(TALLOC_CTX* mem_ctx, const char *name)
+{
+	char *fname;
+
+	fname = talloc_strdup(mem_ctx, lp_lockdir());
+	trim_string(fname,"","/");
+	
+	if (!directory_exist(fname,NULL))
+		mkdir(fname,0755);
+	
+	fname = talloc_asprintf(mem_ctx, "%s/%s", fname, name);
+
+	return fname;
+}
+
+/**
+ * @brief Returns an absolute path to a file in the Samba lib directory.
+ *
+ * @param name File to find, relative to LIBDIR.
+ *
+ * @retval Pointer to a talloc'ed string containing the full path.
+ **/
+
+char *lib_path(TALLOC_CTX* mem_ctx, const char *name)
+{
+	char *fname;
+	fname = talloc_asprintf(mem_ctx, "%s/%s", dyn_LIBDIR, name);
+	return fname;
+}
+
+/**
+ * @brief Returns the platform specific shared library extension.
+ *
+ * @retval Pointer to a static #fstring containing the extension.
+ **/
+
+const char *shlib_ext(void)
+{
+  return dyn_SHLIBEXT;
+}
+
+
+/*********************************************************
+ Recursive routine that is called by unix_wild_match.
+*********************************************************/
+
+static BOOL unix_do_match(char *regexp, char *str)
+{
+	char *p;
+
+	for( p = regexp; *p && *str; ) {
+
+		switch(*p) {
+			case '?':
+				str++;
+				p++;
+				break;
+
+			case '*':
+
+				/*
+				 * Look for a character matching 
+				 * the one after the '*'.
+				 */
+				p++;
+				if(!*p)
+					return True; /* Automatic match */
+				while(*str) {
+
+					while(*str && (*p != *str))
+						str++;
+
+					/*
+					 * Patch from weidel@multichart.de. In the case of the regexp
+					 * '*XX*' we want to ensure there are at least 2 'X' characters
+					 * in the string after the '*' for a match to be made.
+					 */
+
+					{
+						int matchcount=0;
+
+						/*
+						 * Eat all the characters that match, but count how many there were.
+						 */
+
+						while(*str && (*p == *str)) {
+							str++;
+							matchcount++;
+						}
+
+						/*
+						 * Now check that if the regexp had n identical characters that
+						 * matchcount had at least that many matches.
+						 */
+
+						while ( *(p+1) && (*(p+1) == *p)) {
+							p++;
+							matchcount--;
+						}
+
+						if ( matchcount <= 0 )
+							return False;
+					}
+
+					str--; /* We've eaten the match char after the '*' */
+
+					if(unix_do_match(p, str))
+						return True;
+
+					if(!*str)
+						return False;
+					else
+						str++;
+				}
+				return False;
+
+			default:
+				if(*str != *p)
+					return False;
+				str++;
+				p++;
+				break;
+		}
+	}
+
+	if(!*p && !*str)
+		return True;
+
+	if (!*p && str[0] == '.' && str[1] == 0)
+		return(True);
+  
+	if (!*str && *p == '?') {
+		while (*p == '?')
+			p++;
+		return(!*p);
+	}
+
+	if(!*str && (*p == '*' && p[1] == '\0'))
+		return True;
+
+	return False;
+}