P09 lab code added

2020-04-26 15:02:50 +02:00
parent 94945069e3
commit f4c374887c
45 changed files with 2116 additions and 0 deletions
@@ -0,0 +1,51 @@
+//***************************************************************************
+// File:             ProcA6.c
+// Original Author:  M. Thaler (Modul BSY)
+//***************************************************************************
+
+//***************************************************************************
+// system includes
+//***************************************************************************
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
+//***************************************************************************
+// Function: main(), parameter: none
+//***************************************************************************
+
+int main(void) {
+
+    pid_t  pid, id;
+    char   buf[64];
+    int    i;
+
+    pid = fork();
+    switch (pid) {
+      case -1:
+        perror("Could not fork");
+        break;
+      case 0:
+        printf("\n... ich bin das Kind %d\n", getpid());
+        for (i = 0; i < 10; i++) {
+            usleep(500000);                         // slow down a bit
+            printf("Mein Elternprozess ist %d\n", id = getppid());
+        }
+        printf("... so das wars\n");
+        break;
+      default:
+        sleep(2);                                   // terminate
+        exit(0);
+        break;
+    }
+    printf("\n\n*** and here my new parent ****\n\n");
+    sprintf(buf, "ps -p %d", id);
+    system(buf);
+    exit(0);
+}
+
+//***************************************************************************
@@ -0,0 +1,3 @@
+Reparenting -> new parent instead init (1):
+
+command prctl(PR_SET_CHILD_SUBREAPER, 1)
@@ -0,0 +1,26 @@
+# *************************************************************
+# Original Autor:  M. Thaler (Modul BSY)
+# *************************************************************
+
+CMP=        gcc
+CMPFLAGS=   -Wall
+LDFLAGS=
+EXENAMES=   ProcA5.e
+FNAME=      ProcA5
+LIBNAME=
+
+$(EXENAMES):	$(FNAME).o
+	$(CMP)  $(FNAME).o $(LIBNAME) $(LDFLAGS) -o $@
+
+.c.o:
+	$(CMP) -c $(CMPFLAGS) $<
+
+.cc.o:
+	$(CMP) -c $(CMPFLAGS) $<
+
+clean:
+	rm -f *.o $(EXENAMES)
+
+all:
+	@make clean
+	@make