freebsd unix의 포크

Question

포크 시스템 호출은 아동 프로세스에 새로운 사용자 구조를 할당합니까? 아동 프로세스에 새로운 프로세스 구조를 할당합니다.

Answer 1

http://svn.freebsd.org/base/release/7.1.0/sys/kern/kern_fork.c

http://www.freebsd.org/cgi/man.cgi?query=fork&apropos=0&sektion=0&manpath=freebsd+7.1-release&format=html

DESCRIPTION
     The fork() system call causes creation of a new process.  The new process
     (child process) is an exact copy of the calling process (parent process)
     except for the following:

       +o   The child process has a unique process ID.

       +o   The child process has a different parent process ID (i.e., the
           process ID of the parent process).

       +o   The child process has its own copy of the parent's descriptors.
           These descriptors reference the same underlying objects, so
           that, for instance, file pointers in file objects are shared
           between the child and the parent, so that an lseek(2) on a
           descriptor in the child process can affect a subsequent read(2)
           or write(2) by the parent.  This descriptor copying is also
           used by the shell to establish standard input and output for
           newly created processes as well as to set up pipes.

       +o   The child process' resource utilizations are set to 0; see
           setrlimit(2).

       +o   All interval timers are cleared; see setitimer(2).