sequential binary file

[Mag0007]

I have a ZeroED binary file,"binfile" (dd if=/dev/zero of=binfile), size is 1024k

Lets say I have 2 random files (file1, 256k; file2, 128k)

How can I put file1 and file2 into this binfile, sequentially, and also have the ability to retreive the files?

TIA

 

[Salem]

> and also have the ability to retreive the files?
Well you're going to have to create an index of some sort.

Say

struct header {
  char filename[100];
  unsigned long size;
};

Write a header
Write file 1
Write a header
Write file 2

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[Mag0007]

isn't the header normally set to the beginning of the file when it is opened, and each time a character is read or written, the file position is incremented. In other words, access to the file is normally sequential?

 

[Salem]

Yes.

But you asked how to store two files inside another file, and how to then extract those files again sometime later (much like say tar or zip would do).



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