file 3

Author: NewGit1999

0x15-file_io/3-cp.c

@@ -0,0 +1,50 @@
+#include "main.h"
+/**
+ * main - copies the content of a file to another
+ * @argc: number of arguments passed to the program
+ * @argv: array of arguments
+ * Return: 0 On Success
+ */
+int main(int argc, char *argv[])
+{
+	int fd_r, fd_w, r, i, j;
+	char buf[BUFSIZ];
+
+	if (argc != 3)
+	{
+		dprintf(STDERR_FILENO, "Usage: cp file_from file_to\n");
+		exit(97);
+	}
+	fd_r = open(argv[1], O_RDONLY);
+	if (fd_r < 0)
+	{
+		dprintf(STDERR_FILENO, "Error: Can't read from file %s\n", argv[1]);
+		exit(98);
+	}
+	fd_w = open(argv[2], O_CREAT | O_WRONLY | O_TRUNC, 0664);
+	while ((r = read(fd_r, buf, BUFSIZ)) > 0)
+	{
+		if (fd_w < 0 || write(fd_w, buf, r) != r)
+		{
+			dprintf(STDERR_FILENO, "Error: Can't write to %s\n", argv[2]);
+			close(fd_r);
+			exit(99);
+		}
+	}
+	if (r < 0)
+	{
+		dprintf(STDERR_FILENO, "Error: Can't read from file %s\n", argv[1]);
+		exit(98);
+	}
+	i = close(fd_r);
+	j = close(fd_w);
+	if (i < 0 || j < 0)
+	{
+		if (i < 0)
+			dprintf(STDERR_FILENO, "Error: Can't close fd %d\n", fd_r);
+		if (j < 0)
+			dprintf(STDERR_FILENO, "Error: Can't close fd %d\n", fd_w);
+		exit(100);
+	}
+	return (0);
+}