Merge tiny-shell history into shlab-handout directory

1 files changed, 36 insertions, 0 deletions

diff --git a/shlab-handout/mystop.c b/shlab-handout/mystop.c
new file mode 100644
index 0000000..12eee5f
--- /dev/null
+++ b/shlab-handout/mystop.c
@@ -0,0 +1,36 @@
+/* 
+ * mystop.c - Another handy routine for testing your tiny shell
+ * 
+ * usage: mystop <n>
+ * Sleeps for <n> seconds and sends SIGTSTP to itself.
+ *
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+int main(int argc, char **argv) 
+{
+    int i, secs;
+    pid_t pid; 
+
+    if (argc != 2) {
+	fprintf(stderr, "Usage: %s <n>\n", argv[0]);
+	exit(0);
+    }
+    secs = atoi(argv[1]);
+
+    for (i=0; i < secs; i++)
+       sleep(1);
+	
+    pid = getpid(); 
+
+    if (kill(-pid, SIGTSTP) < 0)
+       fprintf(stderr, "kill (tstp) error");
+
+    exit(0);
+
+}