Ajout Exo4 TP5

TP5/Exo1/exo1_3.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+
+int main(void)
+{
+    int fd[2], p;
+    char c;
+
+    p = pipe(fd);
+    assert(p != -1);
+
+    pid_t pr = fork();
+    assert(pr != -1);
+
+    switch (pr)
+    {
+    case 0:
+        close(fd[0]);
+        dup2(fd[1], 1);
+        execl("/usr/bin/ls", "ls", ".", NULL);
+        exit(0);
+
+    default:
+        close(fd[1]);
+        dup2(fd[0], 0);
+        execl("/usr/bin/wc", "wc", "-l", NULL);
+    }
+
+    close(fd[0]);
+    return 0;
+}