"depot M311"

S3T_TP_04_PROCESSUS-3-SGF-2/Demonstrations/Makefile

@@ -0,0 +1,13 @@
+CFLAGS = -Wall -std=gnu99
+
+EXECUTABLES = demo_dup2 \
+	demo_pipe \
+	demo_pipe_fork
+
+
+
+all : ${EXECUTABLES}
+
+clean :
+	@rm -f core *.o *.out *~
+	@rm -f ${EXECUTABLES}

S3T_TP_04_PROCESSUS-3-SGF-2/Demonstrations/demo_dup2.c

@@ -0,0 +1,20 @@
+///********************/
+///*  demo_dup2 : ... */
+///********************/
+# include <stdio.h>
+# include <fcntl.h>
+# include <unistd.h>
+
+# define ENTREE_STANDARD 0
+int main()
+{ int descr_group;
+  char c;
+  descr_group = open ("/etc/passwd", O_RDONLY);
+  dup2 (descr_group, ENTREE_STANDARD);/// retour a tester ...
+  c = getchar();
+  while (c != EOF)
+  {
+     putchar(c); c = getchar();
+  }
+  return 0;
+}

S3T_TP_04_PROCESSUS-3-SGF-2/Demonstrations/demo_fork_fork.c

@@ -0,0 +1,35 @@
+/********************/
+/*  demo_dup2 : ... */
+/********************/
+# include <stdio.h>
+# include <fcntl.h>
+# include <unistd.h>
+#include <stdlib.h>
+
+int main()
+{ int res;
+  int tp[2];
+  pipe (tp);
+  if ((res = fork()) ==-1) {perror ("fork1"); exit (1); } 
+  else if (res != 0) // Pere
+       { 
+          if ((res = res = fork()) ==-1) {perror ("fork2"); exit (1); } 
+          else if (res != 0)
+               { // pere
+                  execlp ("who", "who", NULL);
+               } 
+              else // Fils2
+              { 
+                 close (tp[0]);
+                 dup2 (tp[1], 1);
+                 execlp ("ls", "ls", "-la", NULL);
+              } 
+       }    
+      else // Fils1
+        {
+           close (tp[1]);
+           dup2 (tp[0], 0);
+           execlp ("wc", "wc", "-l", NULL);
+        }  
+   return 0;
+}

S3T_TP_04_PROCESSUS-3-SGF-2/Demonstrations/demo_pipe.c

@@ -0,0 +1,16 @@
+///********************/
+///*  demo_pipe : ... */
+///********************/
+# include <stdio.h>
+# include <unistd.h>
+
+char string[] = "hello";
+int main()
+{ char buf[70];
+  int  fds[2];
+  pipe (fds);
+  write(fds[1], string, 6);
+  read (fds[0], buf, 6);
+  printf ("Chaine provenant du pipe-line : %s \n", buf);
+  return 0;
+}

S3T_TP_04_PROCESSUS-3-SGF-2/Demonstrations/demo_pipe_fork.c

@@ -0,0 +1,51 @@
+
+/// demo_pipe_fork : ...
+/// - Demande de descripteurs de pipe line,
+/// - demande de fork,
+/// - PERE : lit des car. au clavier, ecrit dans le pipe-line
+///          (apres fermeture du descr. inutile),
+/// - FILS : lit dans le pipe-line, ecrit les car. recus
+///         (apres fermeture du descr. inutile),
+
+#include <stdio.h>
+#include <unistd.h>
+
+# define READ 0
+# define WRITE 1
+int main ()
+{ int  pid , tabpipe[2];
+  FILE *stream;
+  char c;
+  char * type;
+  pipe (tabpipe); /// Retour à tester
+  pid = fork();
+  if (pid < 0) printf ("ERREUR FORK");
+  else
+    if (pid == 0)
+    { /// FILS  : LIT DANS LE PIPE-LINE
+     type = "r";
+     stream = fdopen (tabpipe[0], type);
+     close (tabpipe[WRITE]);
+     /// Lecture dans le pipe-line, ecriture sur stdout
+      c = fgetc(stream);
+      while ( c != EOF)
+       { printf("Car. recu : %c \n",c); fflush (stdout);
+         c = fgetc(stream);
+       }
+    }
+    else
+    { /// PERE  : ECRIT DANS LE PIPE-LINE
+     printf ("Message a envoyer (ctrl.D pour finir) : ");
+     close ( tabpipe[READ] );
+     type ="w";
+     stream = fdopen (tabpipe[1], type);
+     /// Lecture sur stdin, ecriture dans le pipe-line
+     c=getchar();
+     while ( c != EOF)
+      { fputc(c, stream); fflush (stream);
+        c=getchar();
+      }
+     /// Production de la fin de fichier
+     fclose (stream); }
+ return 0;
+}