Minor structural change to allow core dumping(or not) from init

-Erik

Changelog

@@ -42,6 +42,7 @@
 		the same, and prints an error (instead of endlessly looping).
 	    - mv now attempts to do a rename, and will fall back to doing
 		a copy only if the rename fails.
+	    - Syslogd now supports multiple concurrent connections
 	* Several fixes from Pavel Roskin <pavel_roskin@geocities.com>:
 	    - Fixes to sort.  Removed "-g", fixed and added "-r"
 	    - Fixes to the makefile for handling "strip"
@@ -58,6 +59,7 @@
 	* Fix "+" parsing bug in date, from "Merle F. McClelland" <mfm@cts.com>.
 	    
 
+
 	-Erik Andersen
 
 

busybox.def.h

@@ -122,6 +122,12 @@
 // at the same time...
 #define BB_FEATURE_USE_PROCFS
 //
+// Enable full regular expressions.  This adds about 
+// 4k.  When this is off, things that would normally
+// use regualr expressions (like grep) will just use
+// normal strings.
+#define BB_FEATURE_FULL_REGULAR_EXPRESSIONS
+//
 // Use termios to manipulate the screen ('more' is prettier with this on)
 #define BB_FEATURE_USE_TERMIOS
 //
@@ -146,6 +152,17 @@
 //Enable init being called as /linuxrc
 //#define BB_FEATURE_LINUXRC
 //
+//Have init enable core dumping for child processed (for debugging only) 
+//#define BB_FEATURE_INIT_COREDUMPS
+//
+// Allow init to permenently chroot, and umount the old root fs
+// just like an initrd does.  Requires a kernel patch by Werner Almesberger. 
+// ftp://icaftp.epfl.ch/pub/people/almesber/misc/umount-root-*.tar.gz
+//#define BB_FEATURE_INIT_CHROOT
+//
+//Make sure nothing is printed to the console on boot
+#define BB_FEATURE_EXTRA_QUIET
+//
 //Simple tail implementation (2k vs 6k for the full one).  Still
 //provides 'tail -f' support -- but for only one file at a time.
 #define BB_FEATURE_SIMPLE_TAIL
@@ -156,7 +173,6 @@
 // Enable support for a real /etc/mtab file instead of /proc/mounts
 //#define BB_FEATURE_MOUNT_MTAB_SUPPORT
 //
-//
 // Enable support for remounting filesystems
 #define BB_FEATURE_REMOUNT
 //
@@ -166,25 +182,9 @@
 //// Enable reverse sort
 //#define BB_FEATURE_SORT_REVERSE
 //
-// Allow init to permenently chroot, and umount the old root fs
-// just like an initrd does.  Requires a kernel patch by Werner Almesberger. 
-// ftp://icaftp.epfl.ch/pub/people/almesber/misc/umount-root-*.tar.gz
-//#define BB_FEATURE_INIT_CHROOT
-//
-//Make sure nothing is printed to the console on boot
-#define BB_FEATURE_EXTRA_QUIET
-//
-// Enable full regular expressions.  This adds about 
-// 4k.  When this is off, things that would normally
-// use regualr expressions (like grep) will just use
-// normal strings.
-#define BB_FEATURE_FULL_REGULAR_EXPRESSIONS
-//
-//
 // Enable command line editing in the shell
 #define BB_FEATURE_SH_COMMAND_EDITING
 //
-//
 //Turn on extra fbset options
 //#define BB_FEATURE_FBSET_FANCY
 //

init.c

@@ -55,13 +55,17 @@
 #include <unistd.h>
 
 
+#if defined BB_FEATURE_INIT_COREDUMPS
 /*
- * When CORE_ENABLE_FLAG_FILE exists, setrlimit is called before
+ * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called 
- * process is spawned to set corelimit to unlimited.
+ * before processes are spawned to set core file size as unlimited.
+ * This is for debugging only.  Don't use this is production, unless
+ * you want core dumps lying about....
  */
 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
 #include <sys/resource.h>
 #include <sys/time.h>
+#endif
 
 #ifndef KERNEL_VERSION
 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
@@ -415,6 +419,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
 			cmd[i] = NULL;
 		}
 
+#if defined BB_FEATURE_INIT_COREDUMPS
 		{
 			struct stat sb;
 			if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
@@ -424,6 +429,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
 				setrlimit(RLIMIT_CORE, &limit);
 			}
 		}
+#endif
 
 		/* Now run it.  The new program will take over this PID, 
 		 * so nothing further in init.c should be run. */

init/init.c

@@ -55,13 +55,17 @@
 #include <unistd.h>
 
 
+#if defined BB_FEATURE_INIT_COREDUMPS
 /*
- * When CORE_ENABLE_FLAG_FILE exists, setrlimit is called before
+ * When a file named CORE_ENABLE_FLAG_FILE exists, setrlimit is called 
- * process is spawned to set corelimit to unlimited.
+ * before processes are spawned to set core file size as unlimited.
+ * This is for debugging only.  Don't use this is production, unless
+ * you want core dumps lying about....
  */
 #define CORE_ENABLE_FLAG_FILE "/.init_enable_core"
 #include <sys/resource.h>
 #include <sys/time.h>
+#endif
 
 #ifndef KERNEL_VERSION
 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
@@ -415,6 +419,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
 			cmd[i] = NULL;
 		}
 
+#if defined BB_FEATURE_INIT_COREDUMPS
 		{
 			struct stat sb;
 			if (stat (CORE_ENABLE_FLAG_FILE, &sb) == 0) {
@@ -424,6 +429,7 @@ static pid_t run(char *command, char *terminal, int get_enter)
 				setrlimit(RLIMIT_CORE, &limit);
 			}
 		}
+#endif
 
 		/* Now run it.  The new program will take over this PID, 
 		 * so nothing further in init.c should be run. */