scr

SCR1.2/TP11/read_file.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define CHUNK_SIZE 256
+
+int main(int argc, char *argv[]) 
+{
+    if (argc != 3) 
+	{
+        fprintf(stderr, "Usage: %s <source_file> <destination_file>\n", argv[0]);
+        return EXIT_FAILURE;
+    }
+
+    int source_desc = open(argv[1], O_RDONLY); 
+    if (source_desc < 0) 
+	{
+        perror("Erreur lors de l'ouverture du fichier source");
+        return EXIT_FAILURE;
+    }
+
+    int dest_desc = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0644); 
+    if (dest_desc < 0) 
+	{
+        perror("Erreur lors de l'ouverture/la création du fichier destination");
+        close(source_desc);
+        return EXIT_FAILURE;
+    }
+
+    char buffer[CHUNK_SIZE];
+    ssize_t bytes_read;
+
+    while ((bytes_read = read(source_desc, buffer, sizeof(buffer))) > 0) 
+	{
+        if (write(dest_desc, buffer, bytes_read) < 0) 
+		{
+            perror("Erreur lors de l'écriture");
+            close(source_desc);
+            close(dest_desc);
+            return EXIT_FAILURE;
+        }
+    }
+
+    if (bytes_read < 0) 
+	{
+        perror("Erreur lors de la lecture du fichier source");
+        close(source_desc);
+        close(dest_desc);
+        return EXIT_FAILURE;
+    }
+
+    close(source_desc);
+    close(dest_desc);
+    return EXIT_SUCCESS;
+}