diff options
Diffstat (limited to '02_exercise/beispiele/fork_signal/fork.c')
-rw-r--r-- | 02_exercise/beispiele/fork_signal/fork.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/02_exercise/beispiele/fork_signal/fork.c b/02_exercise/beispiele/fork_signal/fork.c new file mode 100644 index 0000000..b144577 --- /dev/null +++ b/02_exercise/beispiele/fork_signal/fork.c @@ -0,0 +1,39 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> + +int main(int argc, const char* argv[]) { + pid_t pid; + int h; + int count; + + if (argc < 2) { + printf("Usage: ./fork process#\n"); + return 0; + } + + count = atoi(argv[1]) - 1; + printf("Process#: %d\n", count + 1); + printf("Parent started\n"); + + pid = 1; + for (h = 0; h < count; ++h) { + if ((pid = fork()) < 0) + printf("fork error\n"); + else if (pid == 0) { + printf("Child %d started\n", h); + sleep(1); + printf("Child %d finished\n", h); + exit(0); + } + } + + printf("Parent waiting\n"); + for (h = 0; h < count; ++h) { + wait(NULL); + } + printf("Parent finished\n"); + return EXIT_SUCCESS; +} |