CODEWITHSUNDEEP
clinuxforkexecve
Lipika Deka
Lipika Deka

Reputation: 3884

Execve() of more than one program

Say I have two programs X and Y asking for input from stdin. X and Y are run using fork() followed by execve() from a third from say A.

What is happening is X is scheduled first. When X reaches the scanf statement, Y gets scheduled and X never gets an input. How do I take care of it?

Upvotes: 2

Views: 281

Answers (1)

Steve Emmerson
Steve Emmerson

Reputation: 7832

Have A mediate the input for X and Y. A can create a pipe to and from each child process. It can read a prompt from a pipe, write the prompt to standard output, read the response from standard input, and write the response to the pipe for the child process.

Upvotes: 4

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