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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-13 09:59:37 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-13 09:59:37 +0000
commit76e2632459410dec81337edb6a9fee33c9a660f3 (patch)
treea73345df208eede4a4daad340515c9328f34625c /apt-pkg/dirstream.cc
parentInitial commit. (diff)
downloadapt-76e2632459410dec81337edb6a9fee33c9a660f3.tar.xz
apt-76e2632459410dec81337edb6a9fee33c9a660f3.zip
Adding upstream version 2.7.12.upstream/2.7.12
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'apt-pkg/dirstream.cc')
-rw-r--r--apt-pkg/dirstream.cc118
1 files changed, 118 insertions, 0 deletions
diff --git a/apt-pkg/dirstream.cc b/apt-pkg/dirstream.cc
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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ Directory Stream
+
+ This class provides a simple basic extractor that can be used for
+ a number of purposes.
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <config.h>
+
+#include <apt-pkg/dirstream.h>
+#include <apt-pkg/error.h>
+
+#include <cerrno>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <apti18n.h>
+ /*}}}*/
+
+// DirStream::DoItem - Process an item /*{{{*/
+// ---------------------------------------------------------------------
+/* This is a very simple extractor, it does not deal with things like
+ overwriting directories with files and so on. */
+bool pkgDirStream::DoItem(Item &Itm,int &Fd)
+{
+ switch (Itm.Type)
+ {
+ case Item::File:
+ {
+ /* Open the output file, NDELAY is used to prevent this from
+ blowing up on device special files.. */
+ int iFd = open(Itm.Name,O_NDELAY|O_WRONLY|O_CREAT|O_TRUNC|O_APPEND,
+ Itm.Mode);
+ if (iFd < 0)
+ return _error->Errno("open",_("Failed to write file %s"),
+ Itm.Name);
+
+ // fchmod deals with umask and fchown sets the ownership
+ if (fchmod(iFd,Itm.Mode) != 0)
+ {
+ close(iFd);
+ return _error->Errno("fchmod",_("Failed to write file %s"), Itm.Name);
+ }
+ if (fchown(iFd,Itm.UID,Itm.GID) != 0 && errno != EPERM)
+ {
+ close(iFd);
+ return _error->Errno("fchown",_("Failed to write file %s"), Itm.Name);
+ }
+ Fd = iFd;
+ return true;
+ }
+
+ case Item::HardLink:
+ case Item::SymbolicLink:
+ case Item::CharDevice:
+ case Item::BlockDevice:
+ case Item::Directory:
+ {
+ struct stat Buf;
+ // check if the dir is already there, if so return true
+ if (stat(Itm.Name,&Buf) == 0)
+ {
+ if(S_ISDIR(Buf.st_mode))
+ return true;
+ // something else is there already, return false
+ return false;
+ }
+ // nothing here, create the dir
+ if(mkdir(Itm.Name,Itm.Mode) < 0)
+ return false;
+ return true;
+ }
+ case Item::FIFO:
+ break;
+ }
+
+ return true;
+}
+ /*}}}*/
+// DirStream::FinishedFile - Finished processing a file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgDirStream::FinishedFile(Item &Itm,int Fd)
+{
+ if (Fd < 0)
+ return true;
+
+ /* Set the modification times. The only way it can fail is if someone
+ has futzed with our file, which is intolerable :> */
+ struct timeval times[2];
+ times[0].tv_sec = times[1].tv_sec = Itm.MTime;
+ times[0].tv_usec = times[1].tv_usec = 0;
+ if (utimes(Itm.Name, times) != 0)
+ _error->Errno("utimes", "Failed to set modification time for %s",Itm.Name);
+
+ if (close(Fd) != 0)
+ return _error->Errno("close",_("Failed to close file %s"),Itm.Name);
+ return true;
+}
+ /*}}}*/
+// DirStream::Fail - Failed processing a file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgDirStream::Fail(Item &/*Itm*/, int Fd)
+{
+ if (Fd < 0)
+ return true;
+
+ close(Fd);
+ return false;
+}
+ /*}}}*/