fork syscall

1 files changed, 20 insertions, 0 deletions

diff --git a/user/fork.c b/user/fork.c
new file mode 100644
index 0000000..d534fcf
--- /dev/null
+++ b/user/fork.c
@@ -0,0 +1,20 @@
+#include <unistd.h>
+#include <stdio.h>
+
+int main(void)
+{
+	printf("im going to print some a's and b's. get ready\n");
+
+	int pid = fork();
+	if (pid < 0) {
+		fprintf(stderr, "fork failed!\n");
+		return 1;
+	}
+
+	for (int i = 0; i < 10; i++) {
+		putchar(pid == 0 ? 'a' : 'b');
+		putchar('\n');
+	}
+
+	return 0;
+}