Merge with Matt

[apt.git] / apt-pkg / contrib / fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index db878064d8c02b233a8ef43546d30ef9eb758e0a..9fd71728e9943a702ae6c286067b516ea55a1acc 100644 (file)
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: fileutl.cc,v 1.37 2001/03/03 22:45:59 tausq Exp $
+// $Id: fileutl.cc,v 1.42 2002/09/14 05:29:22 jgg Exp $
 /* ######################################################################
    
    File Utilities
@@ -9,7 +9,7 @@
    GetLock - dpkg compatible lock file manipulation (fcntl)
    
    This source is placed in the Public Domain, do with it what you will
-   It was originally written by Jason Gunthorpe.
+   It was originally written by Jason Gunthorpe <jgg@debian.org>.
    
    ##################################################################### */
                                                                        /*}}}*/
@@ -20,9 +20,11 @@
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/sptr.h>
+#include <apt-pkg/configuration.h>
 
 #include <apti18n.h>
 
+#include <iostream>
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>
@@ -31,8 +33,11 @@
 #include <sys/wait.h>
 #include <signal.h>
 #include <errno.h>
+#include <set>
                                                                        /*}}}*/
 
+using namespace std;
+
 // CopyFile - Buffered copy of a file                                  /*{{{*/
 // ---------------------------------------------------------------------
 /* The caller is expected to set things so that failure causes erasure */
@@ -153,12 +158,12 @@ string flNotDir(string File)
                                                                        /*}}}*/
 // flNotFile - Strip the file from the directory name                  /*{{{*/
 // ---------------------------------------------------------------------
-/* */
+/* Result ends in a / */
 string flNotFile(string File)
 {
    string::size_type Res = File.rfind('/');
    if (Res == string::npos)
-      return File;
+      return "./";
    Res++;
    return string(File,0,Res);
 }
@@ -303,7 +308,7 @@ bool WaitFd(int Fd,bool write,unsigned long timeout)
 /* This is used if you want to cleanse the environment for the forked 
    child, it fixes up the important signals and nukes all of the fds,
    otherwise acts like normal fork. */
-int ExecFork()
+pid_t ExecFork()
 {
    // Fork off the process
    pid_t Process = fork();
@@ -323,10 +328,27 @@ int ExecFork()
       signal(SIGWINCH,SIG_DFL);
       signal(SIGCONT,SIG_DFL);
       signal(SIGTSTP,SIG_DFL);
-      
+
+      set<int> KeepFDs;
+      Configuration::Item const *Opts = _config->Tree("APT::Keep-Fds");
+      if (Opts != 0 && Opts->Child != 0)
+      {
+        Opts = Opts->Child;
+        for (; Opts != 0; Opts = Opts->Next)
+        {
+           if (Opts->Value.empty() == true)
+              continue;
+           int fd = atoi(Opts->Value.c_str());
+           KeepFDs.insert(fd);
+        }
+      }
+
       // Close all of our FDs - just in case
       for (int K = 3; K != 40; K++)
-        fcntl(K,F_SETFD,FD_CLOEXEC);
+      {
+        if(KeepFDs.find(K) == KeepFDs.end())
+           fcntl(K,F_SETFD,FD_CLOEXEC);
+      }
    }
    
    return Process;
@@ -334,10 +356,10 @@ int ExecFork()
                                                                        /*}}}*/
 // ExecWait - Fancy waitpid                                            /*{{{*/
 // ---------------------------------------------------------------------
-/* Waits for the given sub process. If Reap is set the no errors are 
+/* Waits for the given sub process. If Reap is set then no errors are 
    generated. Otherwise a failed subprocess will generate a proper descriptive
    message */
-bool ExecWait(int Pid,const char *Name,bool Reap)
+bool ExecWait(pid_t Pid,const char *Name,bool Reap)
 {
    if (Pid <= 1)
       return true;
@@ -352,7 +374,7 @@ bool ExecWait(int Pid,const char *Name,bool Reap)
       if (Reap == true)
         return false;
       
-      return _error->Error(_("Waited, for %s but it wasn't there"),Name);
+      return _error->Error(_("Waited for %s but it wasn't there"),Name);
    }
 
    
@@ -431,10 +453,13 @@ FileFd::~FileFd()
 // ---------------------------------------------------------------------
 /* We are carefull to handle interruption by a signal while reading 
    gracefully. */
-bool FileFd::Read(void *To,unsigned long Size,bool AllowEof)
+bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual)
 {
    int Res;
    errno = 0;
+   if (Actual != 0)
+      *Actual = 0;
+   
    do
    {
       Res = read(iFd,To,Size);
@@ -448,6 +473,8 @@ bool FileFd::Read(void *To,unsigned long Size,bool AllowEof)
       
       To = (char *)To + Res;
       Size -= Res;
+      if (Actual != 0)
+        *Actual += Res;
    }
    while (Res > 0 && Size > 0);
    
@@ -455,7 +482,7 @@ bool FileFd::Read(void *To,unsigned long Size,bool AllowEof)
       return true;
    
    // Eof handling
-   if (AllowEof == true)
+   if (Actual != 0)
    {
       Flags |= HitEof;
       return true;