CODEWITHSUNDEEP
cdos
krupal
krupal

Reputation: 403

What is file table, environment segment in c object code?

"When we execute our C program, operating system loads the program into memory. In case of DOS, it first loads 256 bytes into memory, called program segment prefix. This contains file table, environment segment, and command line information" - I read this in a documentation of C language. My question is that what is file table, environment segment?

Upvotes: 0

Views: 176

Answers (1)

Lightness Races in Orbit
Lightness Races in Orbit

Reputation: 385194

Wikipedia has a whole article on the Program Segment Prefix, with links to detail on the features that it contains.

From it, we may deduce that:

  • the file table is where open file handles live; and

  • the environment segment contains the names and values for all environment variables in scope.

Upvotes: 1

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