add exec fork readv test apps

testsuits_alpine/exec.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+int main()
+{
+  int child, grandson;
+  char *sargs[] = { "/bin/echo", "Son ", "Hello", "World!", NULL};
+  char *gargs[] = { "/bin/echo", "Grandson ", "Hello", "World!", NULL};
+
+  if (!(child = fork()))
+  {
+        /* child */
+	printf("child:s1:  pid %d: %d is my father\n", getpid(), getppid());
+	if(!(grandson=fork()))
+	{
+	   printf("grandson: pid %d: %d is my father\n", getpid(), getppid());
+	   execve("/bin/echo", gargs, NULL);
+	   printf("pid %d: I am back, something is wrong!\n", getpid());
+        }else{
+	   printf("child:s2: pid %d: %d is my father\n", getpid(), getppid());
+	   wait4(grandson, NULL, 0, NULL);
+	   execve("/bin/echo", sargs, NULL);
+	   printf("pid %d: I am back, something is wrong!\n", getpid());
+	}
+  }
+  else
+  {
+	int myself = getpid();
+	printf("parent: pid %d: %d is my son\n", myself, child);
+	wait4(child, NULL, 0, NULL);
+	printf("pid %d: done\n", myself);
+  }
+  return 0;
+}

testsuits_alpine/forktree.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <string.h>
+
+#define DEPTH 4
+#define SLEEP_TIME 1
+void forktree(const char *cur);
+
+void
+forkchild(const char *cur, char branch) {
+    char nxt[DEPTH + 1];
+
+    if (strlen(cur) >= DEPTH)
+        return;
+
+    snprintf(nxt, DEPTH + 1, "%s%c", cur, branch);
+    if (fork() == 0) {
+        forktree(nxt);
+        //yield();
+        exit(0);
+    }
+}
+
+void
+forktree(const char *cur) {
+    printf("%04x: I am '%s'\n", getpid(), cur);
+
+    forkchild(cur, '0');
+    forkchild(cur, '1');
+}
+
+int
+main(void) {
+    printf("forktree process will sleep %d ticks\n",SLEEP_TIME);
+    sleep(SLEEP_TIME);
+    forktree("");
+    return 0;
+}
+

testsuits_alpine/readv.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/uio.h>
+char head[1024],foo[48], bar[51], baz[49];
+struct iovec iov[3];
+int main ()
+{
+
+
+        ssize_t nr;
+        int fd, i;
+
+        fd = open ("hello.sh", O_RDONLY);
+        if (fd==-1){
+                perror ("open");
+                return 1;
+        }
+	    nr=read(fd, head, sizeof(head));
+	    if(nr==-1) {
+            perror("read");
+            return 2;
+        }
+
+        printf ("read size %d, head: %s\n", nr, (char *) head);
+
+        /* set up our iovec structures */
+        iov[0].iov_base = foo;
+        iov[0].iov_len = sizeof (foo);
+        iov[1].iov_base = bar;
+        iov[1].iov_len = sizeof (bar);
+        iov[2].iov_base = baz;
+        iov[2].iov_len = sizeof (baz);
+
+        /* read into the structures with a single call */
+        nr = readv (fd, iov, 3);
+        if (nr==-1) {
+                perror ("readv");
+                return 1;
+        }
+
+        for (i = 0; i < 3; i++)
+                printf ("IOV%d: size:%d %s\n", i, nr, (char *) iov[i].iov_base);
+
+        if (close (fd)) {
+                perror ("close");
+                return 1;
+        }
+
+        return 0;
+}