X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/094a497dd2dba1f47157e07d57f97c338a5ddaa0..f46e768107c0250eb0609a89a74b66ab3c9d8cec:/apt-pkg/contrib/fileutl.cc

diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 1b087696d..379641c2c 100644
--- 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 1.4 1998/07/12 23:58:48 jgg Exp $
+// $Id: fileutl.cc,v 1.16 1998/11/27 04:20:52 jgg Exp $
 /* ######################################################################
    
    File Utilities
@@ -29,7 +29,7 @@
 // CopyFile - Buffered copy of a file					/*{{{*/
 // ---------------------------------------------------------------------
 /* The caller is expected to set things so that failure causes erasure */
-bool CopyFile(File From,File To)
+bool CopyFile(FileFd &From,FileFd &To)
 {
    if (From.IsOpen() == false || To.IsOpen() == false)
       return false;
@@ -107,13 +107,78 @@ string SafeGetCWD()
    return S;
 }
 									/*}}}*/
+// flNotDir - Strip the directory from the filename			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+string flNotDir(string File)
+{
+   string::size_type Res = File.rfind('/');
+   if (Res == string::npos)
+      return File;
+   Res++;
+   return string(File,Res,Res - File.length());
+}
+									/*}}}*/
+// flNotFile - Strip the file from the directory name			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+string flNotFile(string File)
+{
+   string::size_type Res = File.rfind('/');
+   if (Res == string::npos)
+      return File;
+   Res++;
+   return string(File,0,Res);
+}
+									/*}}}*/
+// SetCloseExec - Set the close on exec flag				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void SetCloseExec(int Fd,bool Close)
+{   
+   if (fcntl(Fd,F_SETFD,(Close == false)?0:FD_CLOEXEC) != 0)
+   {
+      cerr << "FATAL -> Could not set close on exec " << strerror(errno) << endl;
+      exit(100);
+   }
+}
+									/*}}}*/
+// SetNonBlock - Set the nonblocking flag				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void SetNonBlock(int Fd,bool Block)
+{   
+   int Flags = fcntl(Fd,F_GETFL) & (~O_NONBLOCK);
+   if (fcntl(Fd,F_SETFL,Flags | ((Block == false)?0:O_NONBLOCK)) != 0)
+   {
+      cerr << "FATAL -> Could not set non-blocking flag " << strerror(errno) << endl;
+      exit(100);
+   }
+}
+									/*}}}*/
+// WaitFd - Wait for a FD to become readable				/*{{{*/
+// ---------------------------------------------------------------------
+/* This waits for a FD to become readable using select. It is usefull for
+   applications making use of non-blocking sockets. */
+bool WaitFd(int Fd)
+{
+   fd_set Set;
+   FD_ZERO(&Set);
+   FD_SET(Fd,&Set);
 
-// File::File - Open a file						/*{{{*/
+   if (select(Fd+1,&Set,0,0,0) <= 0)
+      return false;
+
+   return true;
+}
+									/*}}}*/
+
+// FileFd::FileFd - Open a file						/*{{{*/
 // ---------------------------------------------------------------------
 /* The most commonly used open mode combinations are given with Mode */
-File::File(string FileName,OpenMode Mode, unsigned long Perms)
+FileFd::FileFd(string FileName,OpenMode Mode, unsigned long Perms)
 {
-   Flags = 0;
+   Flags = AutoClose;
    switch (Mode)
    {
       case ReadOnly:
@@ -121,34 +186,45 @@ File::File(string FileName,OpenMode Mode, unsigned long Perms)
       break;
       
       case WriteEmpty:
-      unlink(FileName.c_str());
-      iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms);
-      break;
+      {
+	 struct stat Buf;
+	 if (stat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode))
+	    unlink(FileName.c_str());
+	 iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_TRUNC,Perms);
+	 break;
+      }
       
       case WriteExists:
       iFd = open(FileName.c_str(),O_RDWR);
       break;
+
+      case WriteAny:
+      iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms);
+      break;      
    }  
 
    if (iFd < 0)
       _error->Errno("open","Could not open file %s",FileName.c_str());
    else
+   {
       this->FileName = FileName;
+      SetCloseExec(iFd,true);
+   }   
 }
 									/*}}}*/
-// File::~File - Closes the file					/*{{{*/
+// FileFd::~File - Closes the file					/*{{{*/
 // ---------------------------------------------------------------------
 /* If the proper modes are selected then we close the Fd and possibly
    unlink the file on error. */
-File::~File()
+FileFd::~FileFd()
 {
    Close();
 }
 									/*}}}*/
-// File::Read - Read a bit of the file					/*{{{*/
+// FileFd::Read - Read a bit of the file				/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool File::Read(void *To,unsigned long Size)
+bool FileFd::Read(void *To,unsigned long Size)
 {
    if (read(iFd,To,Size) != (signed)Size)
    {
@@ -159,10 +235,10 @@ bool File::Read(void *To,unsigned long Size)
    return true;
 }
 									/*}}}*/
-// File::Write - Write to the file					/*{{{*/
+// FileFd::Write - Write to the file					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool File::Write(void *From,unsigned long Size)
+bool FileFd::Write(const void *From,unsigned long Size)
 {
    if (write(iFd,From,Size) != (signed)Size)
    {
@@ -173,10 +249,10 @@ bool File::Write(void *From,unsigned long Size)
    return true;
 }
 									/*}}}*/
-// File::Seek - Seek in the file					/*{{{*/
+// FileFd::Seek - Seek in the file					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool File::Seek(unsigned long To)
+bool FileFd::Seek(unsigned long To)
 {
    if (lseek(iFd,To,SEEK_SET) != (signed)To)
    {
@@ -187,10 +263,10 @@ bool File::Seek(unsigned long To)
    return true;
 }
 									/*}}}*/
-// File::Size - Return the size of the file				/*{{{*/
+// FileFd::Size - Return the size of the file				/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-unsigned long File::Size()
+unsigned long FileFd::Size()
 {
    struct stat Buf;
    if (fstat(iFd,&Buf) != 0)
@@ -198,16 +274,17 @@ unsigned long File::Size()
    return Buf.st_size;
 }
 									/*}}}*/
-// File::Close - Close the file	if the close flag is set		/*{{{*/
+// FileFd::Close - Close the file if the close flag is set		/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool File::Close()
+bool FileFd::Close()
 {
    bool Res = true;
    if ((Flags & AutoClose) == AutoClose)
-      if (close(iFd) != 0)
+      if (iFd >= 0 && close(iFd) != 0)
 	 Res &= _error->Errno("close","Problem closing the file");
-      
+   iFd = -1;
+   
    if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail &&
        FileName.empty() == false)
       if (unlink(FileName.c_str()) != 0)