프로그램 샘플:fork_test.c
--------------------------------------------------------------------------------
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
int nMainPid;
int nChildPid;
nMainPid = getpid();
nChildPid = fork();
if(nChildPid == -1) {
perror("fork error ");
exit(0);
}
else if(nChildPid == 0) {
printf("자식프로세서 nMainPid[%6d] nChildPid[%6d] nGetPid[%6d]\n", nMainPid, nChildPid, getpid());
pause();
}
else{
printf("부모프로세서 nMainPid[%6d] nChildPid[%6d] nGetPid[%6d]\n", nMainPid, nChildPid, getpid());
pause();
}
}
--------------------------------------------------------------------------------
프로그램 샘플 컴파일
--------------------------------------------------------------------------------
# gcc fork_test.c -o fork_test
--------------------------------------------------------------------------------
프로그램 샘플 실행
--------------------------------------------------------------------------------
# ./fork_test
부모프로세서 nMainPid[ 27412] nChildPid[ 27413] nGetPid[ 27412]
자식프로세서 nMainPid[ 27412] nChildPid[ 0] nGetPid[ 27413]
--------------------------------------------------------------------------------
실행 프로세서 확인
--------------------------------------------------------------------------------
# ps -ef |grep fork_test |grep -v grep
UID PID PPID C STIME TTY TIME CMD
test 27412 16186 0 11:17:17 pts/3 0:00 ./fork_test
test 27413 27412 0 11:17:17 pts/3 0:00 ./fork_test
--------------------------------------------------------------------------------
