Merged revisions 172438 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r172438 | tilghman | 2009-01-29 16:54:29 -0600 (Thu, 29 Jan 2009) | 9 lines
  
  Lose the CAP_NET_ADMIN at every fork, instead of at startup.  Otherwise, if
  Asterisk runs as a non-root user and the administrator does a 'restart now',
  Asterisk loses the ability to set QOS on packets.
  (closes issue #14004)
   Reported by: nemo
   Patches: 
         20090105__bug14004.diff.txt uploaded by Corydon76 (license 14)
   Tested by: Corydon76
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@172441 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_rpt.c

@@ -359,6 +359,8 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/cdr.h"
 #include "asterisk/options.h"
 #include "asterisk/manager.h"
+#include "asterisk/app.h"
+
 #include <termios.h>
 
 #ifdef	NEW_ASTERISK
@@ -1966,7 +1968,7 @@ unsigned int seq;
 	sprintf(str,"%s?node=%s&time=%u&seqno=%u",myrpt->p.statpost_url,
 		myrpt->name,(unsigned int) now,seq);
 	if (pairs) sprintf(str + strlen(str),"&%s",pairs);
-	if (!(pid = fork()))
+	if (!(pid = ast_safe_fork(0)))
 	{
 		execv(astrs[0],astrs);
 		ast_log(LOG_ERROR, "exec of %s failed.\n", astrs[0]);

autoconf/ast_func_fork.m4

@@ -39,6 +39,8 @@ else
 fi
 if test "x$ac_cv_func_fork_works" = xyes; then
   AC_DEFINE(HAVE_WORKING_FORK, 1, [Define to 1 if `fork' works.])
+  PBX_WORKING_FORK=1
+  AC_SUBST(PBX_WORKING_FORK)
 fi
 ])# AST_FUNC_FORK
 

configure

@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac Revision: 168734 .
+# From configure.ac Revision: 170112 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for asterisk 1.6.
 #
@@ -972,6 +972,7 @@ TIMERFD_DIR
 PBX_TIMERFD
 ALLOCA
 LIBOBJS
+PBX_WORKING_FORK
 POW_LIB
 HAS_POLL
 PBX_PTHREAD_RWLOCK_INITIALIZER
@@ -13318,6 +13319,8 @@ cat >>confdefs.h <<\_ACEOF
 #define HAVE_WORKING_FORK 1
 _ACEOF
 
+  PBX_WORKING_FORK=1
+
 fi
 
 { echo "$as_me:$LINENO: checking for _LARGEFILE_SOURCE value needed for large files" >&5
@@ -13332,11 +13335,13 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-#include <stdio.h>
+#include <sys/types.h> /* for off_t */
+     #include <stdio.h>
 int
 main ()
 {
-return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
+int (*fp) (FILE *, off_t, int) = fseeko;
+     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
   ;
   return 0;
 }
@@ -13376,11 +13381,13 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #define _LARGEFILE_SOURCE 1
-#include <stdio.h>
+#include <sys/types.h> /* for off_t */
+     #include <stdio.h>
 int
 main ()
 {
-return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
+int (*fp) (FILE *, off_t, int) = fseeko;
+     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
   ;
   return 0;
 }
@@ -53711,6 +53718,7 @@ TIMERFD_DIR!$TIMERFD_DIR$ac_delim
 PBX_TIMERFD!$PBX_TIMERFD$ac_delim
 ALLOCA!$ALLOCA$ac_delim
 LIBOBJS!$LIBOBJS$ac_delim
+PBX_WORKING_FORK!$PBX_WORKING_FORK$ac_delim
 POW_LIB!$POW_LIB$ac_delim
 HAS_POLL!$HAS_POLL$ac_delim
 PBX_PTHREAD_RWLOCK_INITIALIZER!$PBX_PTHREAD_RWLOCK_INITIALIZER$ac_delim
@@ -53745,7 +53753,6 @@ AIS_INCLUDE!$AIS_INCLUDE$ac_delim
 AIS_LIB!$AIS_LIB$ac_delim
 CONFIG_GMIME!$CONFIG_GMIME$ac_delim
 EDITLINE_LIB!$EDITLINE_LIB$ac_delim
-PBX_H323!$PBX_H323$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -53787,6 +53794,7 @@ _ACEOF
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
+PBX_H323!$PBX_H323$ac_delim
 PBX_IXJUSER!$PBX_IXJUSER$ac_delim
 CONFIG_SDL!$CONFIG_SDL$ac_delim
 CONFIG_GTK!$CONFIG_GTK$ac_delim
@@ -53798,7 +53806,7 @@ PBX_GENERIC_ODBC!$PBX_GENERIC_ODBC$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 9; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 10; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5

main/app.c

@@ -36,6 +36,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include <sys/time.h>       /* for getrlimit(2) */
 #include <sys/resource.h>   /* for getrlimit(2) */
 #include <stdlib.h>         /* for closefrom(3) */
+#ifdef HAVE_CAP
+#include <sys/capability.h>
+#endif /* HAVE_CAP */
 
 #include "asterisk/paths.h"	/* use ast_config_AST_DATA_DIR */
 #include "asterisk/channel.h"
@@ -1883,6 +1886,14 @@ int ast_safe_fork(int stop_reaper)
 		return pid;
 	} else {
 		/* Child */
+#ifdef HAVE_CAP
+		cap_t cap = cap_from_text("cap_net_admin-eip");
+
+		if (cap_set_proc(cap)) {
+			ast_log(LOG_WARNING, "Unable to remove capabilities.\n");
+		}
+		cap_free(cap);
+#endif
 
 		/* Before we unblock our signals, return our trapped signals back to the defaults */
 		signal(SIGHUP, SIG_DFL);

main/asterisk.c

@@ -1013,6 +1013,15 @@ int ast_safe_system(const char *s)
 #endif	
 
 	if (pid == 0) {
+#ifdef HAVE_CAP
+		cap_t cap = cap_from_text("cap_net_admin-eip");
+
+		if (cap_set_proc(cap)) {
+			/* Careful with order! Logging cannot happen after we close FDs */
+			ast_log(LOG_WARNING, "Unable to remove capabilities.\n");
+		}
+		cap_free(cap);
+#endif
 #ifdef HAVE_WORKING_FORK
 		if (ast_opt_high_priority)
 			ast_set_priority(0);
@@ -1036,7 +1045,7 @@ int ast_safe_system(const char *s)
 	}
 
 	ast_unreplace_sigchld();
-#else
+#else /* !defined(HAVE_WORKING_FORK) && !defined(HAVE_WORKING_VFORK) */
 	res = -1;
 #endif
 
@@ -3380,7 +3389,7 @@ int main(int argc, char *argv[])
 		if (has_cap) {
 			cap_t cap;
 
-			cap = cap_from_text("cap_net_admin=ep");
+			cap = cap_from_text("cap_net_admin=eip");
 
 			if (cap_set_proc(cap))
 				ast_log(LOG_WARNING, "Unable to install capabilities.\n");