[patch] libsandsandbox file event logging support

sandbox-1.2.1.sbnotify.patch (text/plain), 7.29 KB, created by Zac Medico on 2005-04-25 02:30:23 UTC

diff -Nur --exclude='.*' sandbox-1.2.1.orig/libctest.c sandbox-1.2.1.sbnotify/libctest.c
--- sandbox-1.2.1.orig/libctest.c	2005-04-23 14:01:52.000000000 -0700
+++ sandbox-1.2.1.sbnotify/libctest.c	1969-12-31 16:00:00.000000000 -0800
@@ -1 +0,0 @@
-int main(void) { return 0; }
diff -Nur --exclude='.*' sandbox-1.2.1.orig/libsandbox.c sandbox-1.2.1.sbnotify/libsandbox.c
--- sandbox-1.2.1.orig/libsandbox.c	2005-04-23 13:44:15.000000000 -0700
+++ sandbox-1.2.1.sbnotify/libsandbox.c	2005-04-25 00:48:14.000000000 -0700
@@ -81,6 +81,7 @@
 
 //#include "localdecls.h"
 #include "sandbox.h"
+#include "sbnotify.h"
 
 /* Macros to check if a function should be executed */
 #define FUNCTION_SANDBOX_SAFE(func, path) \
@@ -158,6 +159,9 @@
 static char *filter_path(const char *, int follow_link);
 static int is_sandbox_on();
 static int is_sandbox_pid();
+static void sbnotify_event(int event_flags, const char * canonical, const char * func_name, int result);
+static void sbnotify_log(const char * buffer);
+static int get_sbnotify_eventmask();
 
 /* Wrapped functions */
 
@@ -375,6 +379,8 @@
 		result = true_chmod(path, mode);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_ATTRIB, canonic, "chmod", result);
+
 	return result;
 }
 
@@ -391,6 +397,8 @@
 		result = true_chown(path, owner, group);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_ATTRIB, canonic, "chown", result);
+
 	return result;
 }
 
@@ -408,6 +416,8 @@
 		result = true_open(pathname, O_CREAT | O_WRONLY | O_TRUNC, mode);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "create", result);
+
 	return result;
 }
 
@@ -424,6 +434,11 @@
 		result = true_fopen(pathname, mode);
 		}
 
+	if(mode[0]=='w'||mode[0]=='a'||mode[1]=='+')
+		sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "fopen", (int)result);
+	else
+		sbnotify_event(SBN_ACCESS, canonic, "fopen", (int)result);
+
 	return result;
 }
 
@@ -440,6 +455,8 @@
 		result = true_lchown(path, owner, group);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_ATTRIB, canonic, "lchown", result);
+
 	return result;
 }
 
@@ -457,6 +474,9 @@
 		result = true_link(oldpath, newpath);
 		}
 
+	sbnotify_event(SBN_LINK_FROM, old_canonic, "link", result );
+	sbnotify_event(SBN_MODIFY|SBN_LINK_TO|SBN_CREATE, new_canonic, "link", result );
+
 	return result;
 }
 
@@ -483,6 +503,8 @@
 		result = true_mkdir(pathname, mode);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_CREATE, canonic, "mkdir", result );
+
 	return result;
 }
 
@@ -499,6 +521,8 @@
 		result = true_opendir(name);
 		}
 
+	sbnotify_event(SBN_ACCESS, canonic, "opendir", (int)result );
+
 	return result;
 }
 
@@ -544,6 +568,11 @@
 		result = true_open(pathname, flags, mode);
 		}
 
+	if(flags & (O_WRONLY | O_RDWR))
+		sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "open", result );
+	else
+		sbnotify_event(SBN_ACCESS, canonic, "open", result );
+
 	return result;
 }
 
@@ -561,6 +590,9 @@
 		result = true_rename(oldpath, newpath);
 	}
 
+	sbnotify_event(SBN_MODIFY|SBN_MOVE_FROM|SBN_DELETE, old_canonic, "rename", result );
+	sbnotify_event(SBN_MODIFY|SBN_MOVE_TO|SBN_CREATE, new_canonic, "rename", result );
+
 	return result;
 }
 
@@ -577,6 +609,8 @@
 		result = true_rmdir(pathname);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_DELETE, canonic, "rmdir", result );
+
 	return result;
 }
 
@@ -594,6 +628,9 @@
 		result = true_symlink(oldpath, newpath);
 		}
 
+	sbnotify_event(SBN_SYMLINK_FROM, old_canonic, "symlink", result );
+	sbnotify_event(SBN_MODIFY|SBN_SYMLINK_TO|SBN_CREATE, new_canonic, "symlink", result );
+
 	return result;
 }
 
@@ -610,6 +647,8 @@
 		result = true_truncate(path, length);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "truncate", result );
+
 	return result;
 }
 
@@ -624,6 +663,7 @@
 	 * a device node, bug #79836. */
 	if (0 == strncmp(canonic, "/dev/", 5)) {
 		errno = EACCES;
+		sbnotify_event(SBN_MODIFY|SBN_DELETE, canonic, "unlink", result );
 		return result;
 	}
 
@@ -633,6 +673,8 @@
 		result = true_unlink(pathname);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_DELETE, canonic, "unlink", result );
+
 	return result;
 }
 
@@ -652,6 +694,8 @@
 		result = true_open64(pathname, O_CREAT | O_WRONLY | O_TRUNC, mode);
 		}
 
+	sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "creat64", result);
+
 	return result;
 }
 
@@ -668,6 +712,11 @@
 		result = true_fopen64(pathname, mode);
 		}
 
+	if(mode[0]=='w'||mode[0]=='a'||mode[1]=='+')
+		sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "fopen64", (int)result);
+	else
+		sbnotify_event(SBN_ACCESS, canonic, "fopen64", (int)result);
+
 	return result;
 }
 
@@ -693,6 +742,11 @@
 		result = true_open64(pathname, flags, mode);
 		}
 
+	if(flags & (O_WRONLY | O_RDWR))
+		sbnotify_event(SBN_MODIFY|SBN_WRITE, canonic, "open64", result);
+	else
+		sbnotify_event(SBN_ACCESS, canonic, "open64", result);		
+
 	return result;
 }
 
@@ -709,6 +763,8 @@
 		result = true_truncate64(path, length);
 		}
 
+	sbnotify_event(SBN_MODIFY, canonic, "truncate64", result);
+
 	return result;
 }
 
@@ -824,6 +880,8 @@
 
 	errno = old_errno;
 
+	sbnotify_event(SBN_EXECUTE, filename, "execve", result );
+
 	return result;
 }
 
@@ -1496,6 +1554,46 @@
 	}
 }
 
+static void
+sbnotify_event( int event_flags, const char * canonical, const char * func_name, int result )
+{
+	event_flags = event_flags | SBN_ACCESS;
+	if (result<0) event_flags = event_flags | SBN_ERROR;
+	if (event_flags & get_sbnotify_eventmask())
+	{
+		char buffer[512];
+		sprintf(buffer, "%d\t%s\t%s\t%d\n", event_flags, canonical, func_name, result);
+		sbnotify_log((const char *)&buffer);
+	}
+}
+
+static void
+sbnotify_log(const char * buffer)
+{
+	char *log_path = getenv("SBNOTIFY_LOG");
+	if (log_path == NULL) return;
+	int log_file = true_open(log_path,
+		 O_APPEND | O_WRONLY
+		 | O_CREAT,
+		 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+	if (log_file >= 0) {
+		write(log_file, buffer, strlen(buffer));
+		close(log_file);
+	}
+}
+
+static int
+get_sbnotify_eventmask()
+{
+	const char * env_var = getenv("SBNOTIFY_EVENTMASK");
+	if (NULL != env_var) {
+		int value;
+		if (1==sscanf( env_var, "%i", &value))
+			return value;
+	}
+	return 0;
+}
+
 #include "getcwd.c"
 #include "canonicalize.c"
 #include "sandbox_futils.c"
diff -Nur --exclude='.*' sandbox-1.2.1.orig/sbnotify.h sandbox-1.2.1.sbnotify/sbnotify.h
--- sandbox-1.2.1.orig/sbnotify.h	1969-12-31 16:00:00.000000000 -0800
+++ sandbox-1.2.1.sbnotify/sbnotify.h	2005-04-24 23:05:31.000000000 -0700
@@ -0,0 +1,28 @@
+/*
+ * Sandbox file event notification.  Inspired by Inotify.
+ *
+ * Copyright (C) 2005 Zachary Medico
+ */
+
+#ifndef __SBNOTIFY_H__
+#define __SBNOTIFY_H__
+
+#include <sys/types.h>
+
+/* An attempt to categorize filesystem calls */
+#define SBN_ACCESS			0x00000001	/* File access */
+#define SBN_MODIFY			0x00000002	/* File modify (possibly create)*/
+#define SBN_ATTRIB			0x00000004	/* File change attributes */
+#define SBN_CREATE			0x00000008	/* File create. move, link, or symlink */
+#define SBN_DELETE			0x00000010	/* File delete or move */
+#define SBN_WRITE			0x00000020	/* File open write */
+#define SBN_EXECUTE			0x00000040	/* File execute */
+#define SBN_MOVE_FROM		0x00000080	/* File move from X */
+#define SBN_MOVE_TO			0x00000100	/* File move to Y */
+#define SBN_LINK_FROM		0x00000200	/* Link create from X */
+#define SBN_LINK_TO			0x00000400	/* Link create to Y */
+#define SBN_SYMLINK_FROM	0x00000800	/* Symlink create from X */
+#define SBN_SYMLINK_TO		0x00001000	/* Symlink create to Y */
+#define SBN_ERROR			0x00002000	/* Return value is negative */
+
+#endif