r10068: Use prctl(PR_SET_DUMPABLE) to make sure we can always leave a good

looking corpse on Linux.

diff --git a/source/configure.in b/source/configure.in
index 5ebb3c1e1466f5baabe081db9413c31c8c28205a..fd439e423f9241a9a1f3e5b52d2a16d2390e2dc4 100644 (file)
--- a/source/configure.in
+++ b/source/configure.in
@@ -733,7 +733,7 @@ AC_HEADER_SYS_WAIT
 AC_CHECK_HEADERS(aio.h arpa/inet.h sys/fcntl.h sys/select.h fcntl.h sys/time.h sys/unistd.h rpc/nettype.h)
 AC_CHECK_HEADERS(unistd.h utime.h grp.h sys/id.h limits.h memory.h alloca.h)
 AC_CHECK_HEADERS(rpc/rpc.h rpcsvc/nis.h rpcsvc/ypclnt.h)
-AC_CHECK_HEADERS(sys/param.h ctype.h sys/wait.h sys/resource.h sys/ioctl.h sys/ipc.h)
+AC_CHECK_HEADERS(sys/param.h ctype.h sys/wait.h sys/resource.h sys/ioctl.h sys/ipc.h sys/prctl.h)
 AC_CHECK_HEADERS(sys/mman.h sys/filio.h sys/priv.h sys/shm.h string.h strings.h stdlib.h sys/socket.h)
 AC_CHECK_HEADERS(sys/un.h)
 AC_CHECK_HEADERS(sys/mount.h sys/vfs.h sys/fs/s5param.h sys/filsys.h termios.h termio.h)
@@ -1160,6 +1160,15 @@ AC_CHECK_FUNCS(__sys_llseek llseek _llseek __llseek readdir64 _readdir64 __readd
 AC_CHECK_FUNCS(pread _pread __pread pread64 _pread64 __pread64)
 AC_CHECK_FUNCS(pwrite _pwrite __pwrite pwrite64 _pwrite64 __pwrite64)
 AC_CHECK_FUNCS(open64 _open64 __open64 creat64)
+AC_CHECK_FUNCS(prctl)
+
+AC_TRY_COMPILE([
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#endif
+],
+[int i; i = prtcl(0); ],
+AC_DEFINE(HAVE_PRCTL, 1, [Whether prctl is available]),[])
 
 #
 # 

diff --git a/source/smbd/server.c b/source/smbd/server.c
index 4217d821f4c9c4366b76ffea83516042ac11d52d..a10968749d9009bbb018f33d21050a907f4a0471 100644 (file)
--- a/source/smbd/server.c
+++ b/source/smbd/server.c
@@ -22,6 +22,10 @@
 
 #include "includes.h"
 
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#endif
+
 static int am_parent = 1;
 
 /* the last message the was processed */
@@ -915,6 +919,14 @@ void build_options(BOOL screen);
         * everything after this point is run after the fork()
         */ 
 
+#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
+       /* On Linux we lose the ability to dump core when we change our user
+        * ID. We know how to dump core safely, so let's make sure we have our
+        * dumpable flag set.
+        */
+       prctl(PR_SET_DUMPABLE, 1);
+#endif
+
        /* Initialise the password backed before the global_sam_sid
           to ensure that we fetch from ldap before we make a domain sid up */