diff options
Diffstat (limited to '02_exercise/beispiele/fork_example/fork.c')
-rw-r--r-- | 02_exercise/beispiele/fork_example/fork.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/02_exercise/beispiele/fork_example/fork.c b/02_exercise/beispiele/fork_example/fork.c new file mode 100644 index 0000000..7377b0f --- /dev/null +++ b/02_exercise/beispiele/fork_example/fork.c @@ -0,0 +1,36 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/wait.h> + +int main(void) { + pid_t proc_id; + int status = 0; + + proc_id = fork(); + + if (proc_id < 0) { + fprintf(stderr, "fork error\n"); + fflush(stderr); + return EXIT_FAILURE; + } + + if (proc_id == 0) { + /* child process */ + printf("[child] process id: %d\n", (int) getpid()); + + char* args[] = {"sleep", "1", NULL}; + execvp(args[0], args); + exit(-1); + } + else { + /* parent */ + printf("[parent] process id: %d\n", (int) getpid()); + pid_t child_id = wait(&status); + + printf("[parent] child %d returned: %d\n", + child_id, WEXITSTATUS(status)); + } + + return EXIT_SUCCESS; +} |