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authorMichael Vogt <mvo@debian.org>2010-07-12 13:26:10 +0200
committerMichael Vogt <mvo@debian.org>2010-07-12 13:26:10 +0200
commit2a679f4f71784800b6643b5c4eecb4b11865a439 (patch)
treec8b5f2967f09a3001becf5fb6ff634d933e171a2 /apt-pkg/contrib/fileutl.cc
parent137a73dc58b14f71a11da5940e099725f6dad8ef (diff)
parentd10cef824604012516f26efaae8bab1f29a7820a (diff)
merged from lp:~donkult/apt/sid
Diffstat (limited to 'apt-pkg/contrib/fileutl.cc')
-rw-r--r--apt-pkg/contrib/fileutl.cc61
1 files changed, 54 insertions, 7 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 8f7791a8a..49b2f3828 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -11,6 +11,7 @@
Most of this source is placed in the Public Domain, do with it what
you will
It was originally written by Jason Gunthorpe <jgg@debian.org>.
+ FileFd gzip support added by Martin Pitt <martin.pitt@canonical.com>
The exception is RunScripts() it is under the GPLv2
@@ -656,6 +657,17 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms)
case ReadOnly:
iFd = open(FileName.c_str(),O_RDONLY);
break;
+
+ case ReadOnlyGzip:
+ iFd = open(FileName.c_str(),O_RDONLY);
+ if (iFd > 0) {
+ gz = gzdopen (iFd, "r");
+ if (gz == NULL) {
+ close (iFd);
+ iFd = -1;
+ }
+ }
+ break;
case WriteEmpty:
{
@@ -711,7 +723,10 @@ bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual)
do
{
- Res = read(iFd,To,Size);
+ if (gz != NULL)
+ Res = gzread(gz,To,Size);
+ else
+ Res = read(iFd,To,Size);
if (Res < 0 && errno == EINTR)
continue;
if (Res < 0)
@@ -750,7 +765,10 @@ bool FileFd::Write(const void *From,unsigned long Size)
errno = 0;
do
{
- Res = write(iFd,From,Size);
+ if (gz != NULL)
+ Res = gzwrite(gz,From,Size);
+ else
+ Res = write(iFd,From,Size);
if (Res < 0 && errno == EINTR)
continue;
if (Res < 0)
@@ -776,7 +794,12 @@ bool FileFd::Write(const void *From,unsigned long Size)
/* */
bool FileFd::Seek(unsigned long To)
{
- if (lseek(iFd,To,SEEK_SET) != (signed)To)
+ int res;
+ if (gz)
+ res = gzseek(gz,To,SEEK_SET);
+ else
+ res = lseek(iFd,To,SEEK_SET);
+ if (res != (signed)To)
{
Flags |= Fail;
return _error->Error("Unable to seek to %lu",To);
@@ -790,7 +813,12 @@ bool FileFd::Seek(unsigned long To)
/* */
bool FileFd::Skip(unsigned long Over)
{
- if (lseek(iFd,Over,SEEK_CUR) < 0)
+ int res;
+ if (gz)
+ res = gzseek(gz,Over,SEEK_CUR);
+ else
+ res = lseek(iFd,Over,SEEK_CUR);
+ if (res < 0)
{
Flags |= Fail;
return _error->Error("Unable to seek ahead %lu",Over);
@@ -804,6 +832,11 @@ bool FileFd::Skip(unsigned long Over)
/* */
bool FileFd::Truncate(unsigned long To)
{
+ if (gz)
+ {
+ Flags |= Fail;
+ return _error->Error("Truncating gzipped files is not implemented (%s)", FileName.c_str());
+ }
if (ftruncate(iFd,To) != 0)
{
Flags |= Fail;
@@ -818,7 +851,11 @@ bool FileFd::Truncate(unsigned long To)
/* */
unsigned long FileFd::Tell()
{
- off_t Res = lseek(iFd,0,SEEK_CUR);
+ off_t Res;
+ if (gz)
+ Res = gztell(gz);
+ else
+ Res = lseek(iFd,0,SEEK_CUR);
if (Res == (off_t)-1)
_error->Errno("lseek","Failed to determine the current file position");
return Res;
@@ -829,6 +866,7 @@ unsigned long FileFd::Tell()
/* */
unsigned long FileFd::Size()
{
+ //TODO: For gz, do we need the actual file size here or the uncompressed length?
struct stat Buf;
if (fstat(iFd,&Buf) != 0)
return _error->Errno("fstat","Unable to determine the file size");
@@ -842,8 +880,16 @@ bool FileFd::Close()
{
bool Res = true;
if ((Flags & AutoClose) == AutoClose)
- if (iFd >= 0 && close(iFd) != 0)
- Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
+ {
+ if (gz != NULL) {
+ int const e = gzclose(gz);
+ // gzdopen() on empty files always fails with "buffer error" here, ignore that
+ if (e != 0 && e != Z_BUF_ERROR)
+ Res &= _error->Errno("close",_("Problem closing the gzip file %s"), FileName.c_str());
+ } else
+ if (iFd > 0 && close(iFd) != 0)
+ Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
+ }
if ((Flags & Replace) == Replace && iFd >= 0) {
if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0)
@@ -853,6 +899,7 @@ bool FileFd::Close()
}
iFd = -1;
+ gz = NULL;
if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail &&
FileName.empty() == false)