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| #include <stdio.h>
| #include <errno.h>
| #include <unistd.h>
| #include <string.h>
|
| int g_var = 6;
| char g_buf[]="A string write to stdout.\n";
| int main (int argc, char **argv)
| {
| int var = 88;
| pid_t pid;
|
| if( write(STDOUT_FILENO, g_buf, sizeof(g_buf)-1) < 0)
| {
| printf("Write string to stdout error: %s\n", strerror(errno));
| return -1;
| }
|
| printf("Befor fork\n");
|
| if( (pid=fork()) < 0)
| {
| printf("fork() error: %s\n", strerror(errno));
| return -2;
| }
| else if( 0 == pid)
| {
| printf("Child process PID[%d] running...\n", getpid());
| g_var ++;
| var ++;
| }
| else
| {
| printf("Parent process PID[%d] waiting...\n", getpid());
| sleep(1);
| }
|
| printf("PID=%ld, g_var=%d, var=%d\n", (long) getpid(), g_var, var);
| return 0;
| }
|
|
