Initial revision

2005-04-21 14:53:53 +00:00
commit 9865aeaa79
2264 changed files with 411685 additions and 0 deletions
@@ -0,0 +1,104 @@
+/* test 4 */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+
+pid_t pid0, pid1, pid2, pid3;
+int s, i, fd, nextb, errct = 0;
+char *tempfile = "test4.temp";
+char buf[1024];
+extern int errno;
+
+_PROTOTYPE(int main, (void));
+_PROTOTYPE(void subr, (void));
+_PROTOTYPE(void nofork, (void));
+_PROTOTYPE(void quit, (void));
+
+int main()
+{
+  int k;
+
+  printf("Test  4 ");
+  fflush(stdout);		/* have to flush for child's benefit */
+
+  system("rm -rf DIR_04; mkdir DIR_04");
+  chdir("DIR_04");
+
+  creat(tempfile, 0777);
+  for (k = 0; k < 20; k++) {
+	subr();
+  }
+  unlink(tempfile);
+  quit();
+  return(-1);			/* impossible */
+}
+
+
+void subr()
+{
+  if ( (pid0 = fork()) != 0) {
+	/* Parent 0 */
+	if (pid0 < 0) nofork();
+	if ( (pid1 = fork()) != 0) {
+		/* Parent 1 */
+		if (pid1 < 0) nofork();
+		if ( (pid2 = fork()) != 0) {
+			/* Parent 2 */
+			if (pid2 < 0) nofork();
+			if ( (pid3 = fork()) != 0) {
+				/* Parent 3 */
+				if (pid3 < 0) nofork();
+				for (i = 0; i < 10000; i++);
+				kill(pid2, 9);
+				kill(pid1, 9);
+				kill(pid0, 9);
+				wait(&s);
+				wait(&s);
+				wait(&s);
+				wait(&s);
+			} else {
+				fd = open(tempfile, O_RDONLY);
+				lseek(fd, 20480L * nextb, 0);
+				for (i = 0; i < 10; i++) read(fd, buf, 1024);
+				nextb++;
+				close(fd);
+				exit(0);
+			}
+		} else {
+			while (1) getpid();
+		}
+	} else {
+		while (1) getpid();
+	}
+  } else {
+	while (1) getpid();
+  }
+}
+
+void nofork()
+{
+  int e = errno;
+  printf("Fork failed: %s (%d)\n",strerror(e),e);
+  exit(1);
+}
+
+void quit()
+{
+
+  chdir("..");
+  system("rm -rf DIR*");
+
+  if (errct == 0) {
+	printf("ok\n");
+	exit(0);
+  } else {
+	printf("%d errors\n", errct);
+	exit(1);
+  }
+}