break apart c libaray

1 files changed, 32 insertions, 0 deletions

diff --git a/user/lib/spawn.c b/user/lib/spawn.c
new file mode 100644
index 0000000..78b1a53
--- /dev/null
+++ b/user/lib/spawn.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <error.h>
+#include <unistd.h>
+
+int wait(int32_t *status)
+{
+	return (waitpid(0, status));
+}
+
+int spawn(uint_t prog, char **args)
+{
+	int32_t pid;
+
+	pid = fork();
+	if (pid != 0) {
+		// failure, or we are the parent
+		return (pid);
+	}
+
+	// we are the child
+	pid = getpid();
+
+	// child inherits parent's priority level
+
+	exec(prog, args);
+
+	// uh-oh....
+
+	fprintf(stderr, "Child %d exec() #%u failed\n", pid, prog);
+
+	exit(EXIT_FAILURE);
+}