* apt-pkg/contrib/error.cc:

  - ensure that va_list is not invalid in second try

diff --git a/apt-pkg/contrib/error.cc b/apt-pkg/contrib/error.cc
index 7dad11689d59cfc2146ababe688a4ac432d12929..fe50e606b6fd2a33e45716d8e0962dd06447d053 100644 (file)
--- a/apt-pkg/contrib/error.cc
+++ b/apt-pkg/contrib/error.cc
@@ -58,124 +58,109 @@
 // GlobalError::GlobalError - Constructor                              /*{{{*/
 GlobalError::GlobalError() : PendingFlag(false) {}
                                                                        /*}}}*/
-// GlobalError::FatalE - Get part of the error string from errno       /*{{{*/
-bool GlobalError::FatalE(const char *Function,const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return InsertErrno(FATAL, Function, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::Errno - Get part of the error string from errno                /*{{{*/
-bool GlobalError::Errno(const char *Function,const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return InsertErrno(ERROR, Function, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::WarningE - Get part of the warning string from errno   /*{{{*/
-bool GlobalError::WarningE(const char *Function,const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return InsertErrno(WARNING, Function, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::NoticeE - Get part of the notice string from errno     /*{{{*/
-bool GlobalError::NoticeE(const char *Function,const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return InsertErrno(NOTICE, Function, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::DebugE - Get part of the debug string from errno       /*{{{*/
-bool GlobalError::DebugE(const char *Function,const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return InsertErrno(DEBUG, Function, Description, args);
+// GlobalError::FatalE, Errno, WarningE, NoticeE and DebugE - Add to the list/*{{{*/
+#define GEMessage(NAME, TYPE) \
+bool GlobalError::NAME (const char *Function, const char *Description,...) { \
+       va_list args; \
+       size_t msgSize = 400; \
+       int const errsv = errno; \
+       while (true) { \
+               va_start(args,Description); \
+               if (InsertErrno(TYPE, Function, Description, args, errsv, msgSize) == false) \
+                       break; \
+               va_end(args); \
+       } \
+       return false; \
 }
+GEMessage(FatalE, FATAL)
+GEMessage(Errno, ERROR)
+GEMessage(WarningE, WARNING)
+GEMessage(NoticeE, NOTICE)
+GEMessage(DebugE, DEBUG)
+#undef GEMessage
                                                                        /*}}}*/
 // GlobalError::InsertErrno - Get part of the errortype string from errno/*{{{*/
 bool GlobalError::InsertErrno(MsgType const &type, const char *Function,
                                const char *Description,...) {
        va_list args;
-       va_start(args,Description);
-       return InsertErrno(type, Function, Description, args);
+       size_t msgSize = 400;
+       int const errsv = errno;
+       while (true) {
+               va_start(args,Description);
+               if (InsertErrno(type, Function, Description, args, errsv, msgSize) == false)
+                       break;
+               va_end(args);
+       }
+       return false;
 }
                                                                        /*}}}*/
 // GlobalError::InsertErrno - formats an error message with the errno  /*{{{*/
 bool GlobalError::InsertErrno(MsgType type, const char* Function,
-                             const char* Description, va_list &args) {
-       int const errsv = errno;
-       char* S = (char*) malloc(400);
-       size_t const Ssize = snprintf(S, 400, "%s - %s (%i: %s)", Description,
-                                     Function, errsv, strerror(errsv)) + 1;
-
-       if (Ssize > 400) {
-               free(S);
-               S = (char*) malloc(Ssize);
-               snprintf(S, Ssize, "%s - %s (%i: %s)", Description,
-                        Function, errsv, strerror(errsv));
+                             const char* Description, va_list &args,
+                             int const errsv, size_t &msgSize) {
+       char* S = (char*) malloc(msgSize);
+       int const n = snprintf(S, msgSize, "%s - %s (%i: %s)", Description,
+                              Function, errsv, strerror(errsv));
+       if (n > -1 && ((unsigned int) n) < msgSize);
+       else {
+               if (n > -1)
+                       msgSize = n + 1;
+               else
+                       msgSize *= 2;
+               return true;
        }
 
-       bool const geins = Insert(type, S, args);
+       bool const geins = Insert(type, S, args, msgSize);
        free(S);
        return geins;
 }
                                                                        /*}}}*/
-// GlobalError::Fatal - Add a fatal error to the list                  /*{{{*/
-bool GlobalError::Fatal(const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return Insert(FATAL, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::Error - Add an error to the list                       /*{{{*/
-bool GlobalError::Error(const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return Insert(ERROR, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::Warning - Add a warning to the list                    /*{{{*/
-bool GlobalError::Warning(const char *Description,...) {
-       va_list args;
-       va_start(args,Description);
-       return Insert(WARNING, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::Notice - Add a notice to the list                      /*{{{*/
-bool GlobalError::Notice(const char *Description,...)
-{
-       va_list args;
-       va_start(args,Description);
-       return Insert(NOTICE, Description, args);
-}
-                                                                       /*}}}*/
-// GlobalError::Debug - Add a debug to the list                                /*{{{*/
-bool GlobalError::Debug(const char *Description,...)
-{
-       va_list args;
-       va_start(args,Description);
-       return Insert(DEBUG, Description, args);
+// GlobalError::Fatal, Error, Warning, Notice and Debug - Add to the list/*{{{*/
+#define GEMessage(NAME, TYPE) \
+bool GlobalError::NAME (const char *Description,...) { \
+       va_list args; \
+       size_t msgSize = 400; \
+       while (true) { \
+               va_start(args,Description); \
+               if (Insert(TYPE, Description, args, msgSize) == false) \
+                       break; \
+               va_end(args); \
+       } \
+       return false; \
 }
+GEMessage(Fatal, FATAL)
+GEMessage(Error, ERROR)
+GEMessage(Warning, WARNING)
+GEMessage(Notice, NOTICE)
+GEMessage(Debug, DEBUG)
+#undef GEMessage
                                                                        /*}}}*/
 // GlobalError::Insert - Add a errotype message to the list            /*{{{*/
 bool GlobalError::Insert(MsgType const &type, const char *Description,...)
 {
        va_list args;
-       va_start(args,Description);
-       return Insert(type, Description, args);
+       size_t msgSize = 400;
+       while (true) {
+               va_start(args,Description);
+               if (Insert(type, Description, args, msgSize) == false)
+                       break;
+               va_end(args);
+       }
+       return false;
 }
                                                                        /*}}}*/
 // GlobalError::Insert - Insert a new item at the end                  /*{{{*/
 bool GlobalError::Insert(MsgType type, const char* Description,
-                        va_list &args) {
-       char* S = (char*) malloc(400);
-       size_t const Ssize = vsnprintf(S, 400, Description, args) + 1;
-
-       if (Ssize > 400) {
-               free(S);
-               S = (char*) malloc(Ssize);
-               vsnprintf(S, Ssize, Description, args);
+                        va_list &args, size_t &msgSize) {
+       char* S = (char*) malloc(msgSize);
+       int const n = vsnprintf(S, msgSize, Description, args);
+       if (n > -1 && ((unsigned int) n) < msgSize);
+       else {
+               if (n > -1)
+                       msgSize = n + 1;
+               else
+                       msgSize *= 2;
+               return true;
        }
 
        Item const m(S, type);

diff --git a/apt-pkg/contrib/error.h b/apt-pkg/contrib/error.h
index ae756dbc49742cc349fe3183ac098eb54ba5576c..21c51c1be9d7388b208cb3ea7404f2a3108f65df 100644 (file)
--- a/apt-pkg/contrib/error.h
+++ b/apt-pkg/contrib/error.h
@@ -307,9 +307,10 @@ private:                                                           /*{{{*/
        std::list<MsgStack> Stacks;
 
        bool InsertErrno(MsgType type, const char* Function,
-                        const char* Description, va_list &args);
+                        const char* Description, va_list &args,
+                        int const errsv, size_t &msgSize);
        bool Insert(MsgType type, const char* Description,
-                        va_list &args);
+                        va_list &args, size_t &msgSize);
                                                                        /*}}}*/
 };
                                                                        /*}}}*/

diff --git a/debian/changelog b/debian/changelog
index 0c98f458153358598322579cc4b78be200075abb..58e2c7e6d315228740158d0342415548042f3747 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+apt (0.8.11.4) UNRELEASED; urgency=low
+
+  [ David Kalnischkies ]
+  * apt-pkg/contrib/error.cc:
+    - ensure that va_list is not invalid in second try
+
+ -- David Kalnischkies <kalnischkies@gmail.com>  Tue, 15 Feb 2011 13:09:57 +0100
+
 apt (0.8.11.3) unstable; urgency=low
 
   * apt-pkg/contrib/fileutl.cc:

diff --git a/test/libapt/globalerror_test.cc b/test/libapt/globalerror_test.cc
index b2752255fe43250f7be47fe1c4602c70b5ae1c5a..7d933f5a84fe591dc9cf7a0c0f988f379354dfe6 100644 (file)
--- a/test/libapt/globalerror_test.cc
+++ b/test/libapt/globalerror_test.cc
@@ -2,6 +2,7 @@
 
 #include "assert.h"
 #include <string>
+#include <errno.h>
 
 int main(int argc,char *argv[])
 {
@@ -73,5 +74,36 @@ int main(int argc,char *argv[])
        equals(text, "A Warning");
        equals(_error->empty(), true);
 
+       errno = 0;
+       equals(_error->Errno("errno", "%s horrible %s %d times", "Something", "happend", 2), false);
+       equals(_error->empty(), false);
+       equals(_error->PendingError(), true);
+       equals(_error->PopMessage(text), true);
+       equals(_error->PendingError(), false);
+       equals(text, "Something horrible happend 2 times - errno (0: Success)");
+       equals(_error->empty(), true);
+
+       std::string longText;
+       for (size_t i = 0; i < 500; ++i)
+               longText.append("a");
+       equals(_error->Error("%s horrible %s %d times", longText.c_str(), "happend", 2), false);
+       equals(_error->PopMessage(text), true);
+       equals(text, std::string(longText).append(" horrible happend 2 times"));
+
+       equals(_error->Errno("errno", "%s horrible %s %d times", longText.c_str(), "happend", 2), false);
+       equals(_error->PopMessage(text), true);
+       equals(text, std::string(longText).append(" horrible happend 2 times - errno (0: Success)"));
+
+       equals(_error->Warning("Репозиторий не обновлён и будут %d %s", 4, "test"), false);
+       equals(_error->PopMessage(text), false);
+       equals(text, "Репозиторий не обновлён и будут 4 test");
+
+       longText.clear();
+       for (size_t i = 0; i < 50; ++i)
+               longText.append("РезийбёбAZ");
+       equals(_error->Warning(longText.c_str()), false);
+       equals(_error->PopMessage(text), false);
+       equals(text, longText);
+
        return 0;
 }