new files needed by profiling code

(This used to be commit cae71af4536ff8bd15080f22f9a559f72ff44c68)

1 files changed, 113 insertions, 0 deletions

diff --git a/source3/profile/profile.c b/source3/profile/profile.c
new file mode 100644
index 0000000000..b685b11916
--- /dev/null
+++ b/source3/profile/profile.c
@@ -0,0 +1,113 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   store smbd profiling information in shared memory
+   Copyright (C) Andrew Tridgell 1999
+   
+   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"
+
+#ifdef WITH_PROFILE
+
+#ifndef HAVE_SYSV_IPC
+#error "You must have SYSV shared memory to compile in the profiling code"
+#endif
+
+extern int DEBUGLEVEL;
+
+#define SHMEM_KEY ((key_t)0x07021999)
+#define SHM_MAGIC 0x6349985
+#define SHM_VERSION 1
+
+#define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6))
+
+static int shm_id;
+static BOOL read_only;
+
+struct profile_struct *profile_p;
+
+/*******************************************************************
+  open the profiling shared memory area
+  ******************************************************************/
+BOOL profile_setup(BOOL rdonly)
+{
+	struct shmid_ds shm_ds;
+
+	read_only = rdonly;
+
+ again:
+	/* try to use an existing key */
+	shm_id = shmget(SHMEM_KEY, 0, 0);
+	
+	/* if that failed then create one. There is a race condition here
+	   if we are running from inetd. Bad luck. */
+	if (shm_id == -1) {
+		if (read_only) return False;
+		shm_id = shmget(SHMEM_KEY, sizeof(*profile_p), 
+				IPC_CREAT | IPC_EXCL | IPC_PERMS);
+	}
+	
+	if (shm_id == -1) {
+		DEBUG(0,("Can't create or use IPC area. Error was %s\n", 
+			 strerror(errno)));
+		return False;
+	}   
+	
+	
+	profile_p = (struct profile_struct *)shmat(shm_id, 0, 
+						   read_only?SHM_RDONLY:0);
+	if ((long)profile_p == -1) {
+		DEBUG(0,("Can't attach to IPC area. Error was %s\n", 
+			 strerror(errno)));
+		return False;
+	}
+
+	/* find out who created this memory area */
+	if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
+		DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n", 
+			 strerror(errno)));
+		return False;
+	}
+
+	if (shm_ds.shm_perm.cuid != 0 || shm_ds.shm_perm.cgid != 0) {
+		DEBUG(0,("ERROR: root did not create the shmem\n"));
+		return False;
+	}
+
+	if (shm_ds.shm_segsz != sizeof(*profile_p)) {
+		DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
+			 (int)shm_ds.shm_segsz, sizeof(*profile_p)));
+		if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
+			goto again;
+		} else {
+			return False;
+		}
+	}
+
+	if (!read_only && (shm_ds.shm_nattch == 1)) {
+		memset((char *)profile_p, 0, sizeof(*profile_p));
+		DEBUG(3,("Initialised profile area\n"));
+	}
+
+	return True;
+}
+
+#else
+ /* to keep compilers happy about empty modules */
+ void profile_dummy(void) {}
+#endif