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Commit070140e

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Add some functions to fd.c for the convenience of extensions.
For example, if you want to perform an ioctl() on a file descriptoropened through the fd.c routines, there's no way to do that withoutbeing able to get at the underlying fd.KaiGai Kohei
1 parent77a1d1e commit070140e

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2 files changed

+37
-0
lines changed
  • src
    • backend/storage/file
    • include/storage

2 files changed

+37
-0
lines changed

‎src/backend/storage/file/fd.c

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Original file line numberDiff line numberDiff line change
@@ -1577,6 +1577,40 @@ FilePathName(File file)
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returnVfdCache[file].fileName;
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}
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/*
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* Return the raw file descriptor of an opened file.
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*
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* The returned file descriptor will be valid until the file is closed, but
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* there are a lot of things that can make that happen. So the caller should
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* be careful not to do much of anything else before it finishes using the
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* returned file descriptor.
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*/
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int
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FileGetRawDesc(Filefile)
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{
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Assert(FileIsValid(file));
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returnVfdCache[file].fd;
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}
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/*
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* FileGetRawFlags - returns the file flags on open(2)
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*/
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int
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FileGetRawFlags(Filefile)
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{
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Assert(FileIsValid(file));
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returnVfdCache[file].fileFlags;
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}
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/*
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* FileGetRawMode - returns the mode bitmask passed to open(2)
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*/
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int
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FileGetRawMode(Filefile)
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{
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Assert(FileIsValid(file));
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returnVfdCache[file].fileMode;
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}
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/*
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* Make room for another allocatedDescs[] array entry if needed and possible.

‎src/include/storage/fd.h

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -75,6 +75,9 @@ extern intFileSync(File file);
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externoff_tFileSeek(Filefile,off_toffset,intwhence);
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externintFileTruncate(Filefile,off_toffset);
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externchar*FilePathName(Filefile);
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externintFileGetRawDesc(Filefile);
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externintFileGetRawFlags(Filefile);
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externintFileGetRawMode(Filefile);
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/* Operations that allow use of regular stdio --- USE WITH CAUTION */
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externFILE*AllocateFile(constchar*name,constchar*mode);

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