Exec (11.11)

• The exec system call replaces the program being run by a process by a different one

• The new program starts executing from its beginning

• Variations on exec: execl(), execv(), etc. which will be discussed later in the course

• On success, exec never returns; on failure, exec returns with value -1

process A

running

program X

process A

running

program Y

exec(“Y”)

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