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authorDavid Kalnischkies <david@kalnischkies.de>2016-07-29 21:39:20 +0200
committerJulian Andres Klode <jak@debian.org>2016-10-05 12:02:19 +0200
commit1b63558a39ee1eed7eb024cd0e164d73beb165b1 (patch)
treeb902625038ce6ff4d1ae999a8f9017cd4daf105f /apt-pkg/contrib
parentdf47efeb5764bba8ac4789727f9ffe970e5cd756 (diff)
if the FileFd failed already following calls should fail, too
There is no point in trying to perform Write/Read on a FileFd which already failed as they aren't going to work as expected, so we should make sure that they fail early on and hard. (cherry picked from commit 02c38073af51802c02bb104d4450e0e112d641ad)
Diffstat (limited to 'apt-pkg/contrib')
-rw-r--r--apt-pkg/contrib/fileutl.cc18
1 files changed, 10 insertions, 8 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 76eb6c7f0..b8409c35d 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -2375,7 +2375,7 @@ FileFd::~FileFd()
gracefully. */
bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
ssize_t Res = 1;
errno = 0;
@@ -2426,7 +2426,7 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
char* FileFd::ReadLine(char *To, unsigned long long const Size)
{
*To = '\0';
- if (d == nullptr)
+ if (d == nullptr || Failed())
return nullptr;
return d->InternalReadLine(To, Size);
}
@@ -2434,6 +2434,8 @@ char* FileFd::ReadLine(char *To, unsigned long long const Size)
// FileFd::Flush - Flush the file /*{{{*/
bool FileFd::Flush()
{
+ if (Failed())
+ return false;
if (d == nullptr)
return true;
@@ -2443,7 +2445,7 @@ bool FileFd::Flush()
// FileFd::Write - Write to the file /*{{{*/
bool FileFd::Write(const void *From,unsigned long long Size)
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
ssize_t Res = 1;
errno = 0;
@@ -2499,7 +2501,7 @@ bool FileFd::Write(int Fd, const void *From, unsigned long long Size)
// FileFd::Seek - Seek in the file /*{{{*/
bool FileFd::Seek(unsigned long long To)
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
Flags &= ~HitEof;
return d->InternalSeek(To);
@@ -2508,7 +2510,7 @@ bool FileFd::Seek(unsigned long long To)
// FileFd::Skip - Skip over data in the file /*{{{*/
bool FileFd::Skip(unsigned long long Over)
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
return d->InternalSkip(Over);
}
@@ -2516,7 +2518,7 @@ bool FileFd::Skip(unsigned long long Over)
// FileFd::Truncate - Truncate the file /*{{{*/
bool FileFd::Truncate(unsigned long long To)
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
// truncating /dev/null is always successful - as we get an error otherwise
if (To == 0 && FileName == "/dev/null")
@@ -2529,7 +2531,7 @@ bool FileFd::Truncate(unsigned long long To)
/* */
unsigned long long FileFd::Tell()
{
- if (d == nullptr)
+ if (d == nullptr || Failed())
return false;
off_t const Res = d->InternalTell();
if (Res == (off_t)-1)
@@ -2592,7 +2594,7 @@ time_t FileFd::ModificationTime()
unsigned long long FileFd::Size()
{
if (d == nullptr)
- return false;
+ return 0;
return d->InternalSize();
}
/*}}}*/