Ajout de l'exo 1 TP 5

TP5/Exo1/exo1_1.c

@@ -0,0 +1,15 @@
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+int main(int argc, char *argv[])
+{
+    int t[2];
+    int size;
+    assert(pipe(t) == 0);
+    size = fcntl(t[0], F_GETPIPE_SZ);
+    printf("size = %d\n", size);
+    return 0;
+}

TP5/Exo1/exo1_2.c

@@ -0,0 +1,46 @@
+#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(int argc, char *argv[])
+{
+    if (argc < 2)
+    {
+        printf("Usage: %s <file>\n", argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    int pip, fd[2], outfile, d;
+    char buf;
+    pip = pipe(fd);
+    assert(pip != -1);
+
+    pid_t p = fork();
+    assert(p != -1);
+
+    outfile = open(argv[1], O_WRONLY | O_CREAT, 0644);
+
+    switch (p)
+    {
+    case 0:
+        close(fd[0]);
+        d = dup2(fd[1], 1);
+        execl("/usr/bin/ls", "ls", "-i", "-l", "/tmp", NULL);
+        close(fd[1]);
+        exit(0);
+    default:
+        close(fd[1]);
+        while (read(fd[0], &buf, sizeof(char)) > 0)
+        {
+            write(outfile, &buf, sizeof(char));
+        }
+        break;
+    }
+
+    close(outfile);
+    return EXIT_SUCCESS;
+}