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-rw-r--r--source3/profile/profile.c113
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