Renaming all folders

04_AdvancedFileIO/writev.c

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+/*
+ * SPDX-License-Identifier: MIT
+ * Copyright (c) 2025 Fabio Scotto di Santolo
+ */
+
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+
+int main(void)
+{
+	struct iovec iov[3];
+
+	char *buf[] = {"The term buccaneer comes from the word boucan.\n",
+		       "A boucan is a wooden frame used for cooking meet.\n",
+		       "Buccaneer is the West Indies name for a pirate.\n"};
+
+	int fd = open("buccaneer.txt", O_WRONLY | O_CREAT | O_TRUNC);
+	if (fd == -1) {
+		perror("open");
+		return 1;
+	}
+
+	// fill out three iovec structures
+	for (int i = 0; i < 3; i++) {
+		iov[i].iov_base = buf[i];
+		iov[i].iov_len = strlen(buf[i]) + 1;
+	}
+
+	// with a single call, write them all out
+	ssize_t nr = writev(fd, iov, 3);
+	if (nr == -1) {
+		perror("writev");
+		return 1;
+	}
+
+	printf("wrote %lu bytes\n", nr);
+
+	if (close(fd)) {
+		perror("close");
+		return 1;
+	}
+
+	return 0;
+}