Writting header and files

1 files changed, 68 insertions, 9 deletions

diff --git a/src/main.c b/src/main.c
index d6df9d7..1161278 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,65 @@
 #include "tar.h"
 
+// only first hard link
+// checksum positive and negative bytes
+
+int write_file(int fd, char *file_name)
+{
+	struct stat	statbuf;
+	t_header	header;
+
+	stat(file_name, &statbuf);
+	bzero(&header, sizeof(t_header));
+	strncpy(header.file_name, file_name, sizeof(header.file_name));
+	sprintf(header.file_mode, "%07o", statbuf.st_mode & 0777);
+	sprintf(header.user_id,   "%07o", statbuf.st_uid);
+	sprintf(header.group_id,  "%07o", statbuf.st_gid);
+	sprintf(header.file_size, "%011lo", statbuf.st_size);
+	sprintf(header.last_time, "%011lo", statbuf.st_mtime);
+	memset(header.checksum, ' ', sizeof(header.checksum));
+	header.file_type[0] = '0';
+
+	/* strncpy(header.ustar, "ustar", sizeof(header.ustar)); */
+	char			*header_ptr = (char*)&header;
+	unsigned int	sum = 0;
+	for (size_t i = 0; i < sizeof(t_header); i++)
+		sum += header_ptr[i];
+	sprintf(header.checksum,  "%06o", sum);
+
+	char buf[512] = {0};
+	memcpy(buf, &header, sizeof(t_header));
+	write(fd, buf, 512);
+
+
+	int from;
+	char *content;
+	switch (statbuf.st_mode & S_IFMT)
+	{
+		case S_IFDIR: break;
+		default:
+			from = open(file_name, O_RDONLY);
+			content = calloc(statbuf.st_size + 1, sizeof(char));
+			read(from, content, statbuf.st_size);
+			write(fd, content, statbuf.st_size);
+			free(content);
+			close(from);
+			memset(buf, '\0', 512);
+			write(fd, buf, 512 - statbuf.st_size % 512);
+	}
+
+	// if dir
+	//    write_dir
+	// else
+	// 	  write content
+	return (0);
+}
+
+int write_directory(int fd, char *dirname)
+{
+	// for f in files
+	//     write_file
+}
+
 int main(int argc, char **argv)
 {
 	int		opt;
@@ -35,18 +95,17 @@ int main(int argc, char **argv)
 		}
 	}
 
-	// pipe to fd
-	printf("out: %s\n", output_file_name);
+	/* printf("out: %s\n", output_file_name); */
 	char	**files = argv + optind;
 	for (; *files != NULL; files++)
 	{
-		// stat file
-		// write header to pipe
-		// if dir
-		//     recursion on files in dir
-		// else
-		//     write content to pipe
-		printf("%s\n", *files);
+		/* printf("%s\n", *files); */
+		write_file(fd, *files);
 	}
+	char buf[512] = {'\0'};
+	write(fd, buf, 512);
+	write(fd, buf, 512);
+	if (fd != STDOUT_FILENO)
+		close(fd);
 	return 0;
 }