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authorDavid Kalnischkies <david@kalnischkies.de>2014-04-21 13:26:55 +0200
committerDavid Kalnischkies <david@kalnischkies.de>2014-04-26 09:51:05 +0200
commitd99854cac4065bc7b337815fb2116269d58dab73 (patch)
tree70da8273517b7ffb025aa47862c26f7fd6d54480 /apt-pkg
parent7187074bfc7a6932ab21c33546e71b61abe258e3 (diff)
handle pkgnames shorter than modifiers
The bugreport highlights the problem with an empty package name. We fix this by 'ignoring' these so that it behaves just like "apt-get install". The deeper problem is that modifier strings can be longer than a package name in which case the comparison doesn't make sense, so don't compare then. Was not noticed so far as all modifiers are of length 1, so the only package name shorter than this is in fact the empty package name. Closes: 744940
Diffstat (limited to 'apt-pkg')
-rw-r--r--apt-pkg/cacheset.cc6
1 files changed, 4 insertions, 2 deletions
diff --git a/apt-pkg/cacheset.cc b/apt-pkg/cacheset.cc
index d453a2bfb..2ed6a96da 100644
--- a/apt-pkg/cacheset.cc
+++ b/apt-pkg/cacheset.cc
@@ -391,6 +391,8 @@ bool VersionContainerInterface::FromModifierCommandLine(unsigned short &modID,
CacheSetHelper &helper) {
Version select = NEWEST;
std::string str = cmdline;
+ if (unlikely(str.empty() == true))
+ return false;
bool modifierPresent = false;
unsigned short fallback = modID;
for (std::list<Modifier>::const_iterator mod = mods.begin();
@@ -400,8 +402,8 @@ bool VersionContainerInterface::FromModifierCommandLine(unsigned short &modID,
size_t const alength = strlen(mod->Alias);
switch(mod->Pos) {
case Modifier::POSTFIX:
- if (str.compare(str.length() - alength, alength,
- mod->Alias, 0, alength) != 0)
+ if (str.length() <= alength ||
+ str.compare(str.length() - alength, alength, mod->Alias, 0, alength) != 0)
continue;
str.erase(str.length() - alength);
modID = mod->ID;