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#include "tar.h"
int archive_create(int archive_fd, char **files, bool verbose)
{
char file_name[PATH_MAX];
struct stat root_statbuf;
for (; *files != NULL; files++)
{
bzero(file_name, PATH_MAX);
strcpy(file_name, *files);
file_write(archive_fd, file_name, verbose);
}
if (stat("/", &root_statbuf) == -1)
{
perror("achive_write");
return -1;
}
if (record_write_blank(archive_fd, 2 + (2 * root_statbuf.st_blksize) / RECORD_SIZE) == -1)
return -1;
return 0;
}
int archive_extract(int archive_fd, bool verbose)
{
char record[RECORD_SIZE];
t_header header;
int fd;
struct stat statbuf;
while (true)
{
if (record_read(archive_fd, record) == -1)
return -1;
if (record_is_blank(record))
{
if (record_read(archive_fd, record) == -1)
return -1;
if (record_is_blank(record))
break;
else
return -1;
}
if (header_parse(record, &statbuf, &header) == -1)
return -1;
if (verbose)
put_file_name(header.file_name);
switch (header.file_type[0])
{
case '5':
if (mkdir(header.file_name, statbuf.st_mode) == -1)
{
perror(NULL);
return -1;
}
break;
case '0':
fd = open(header.file_name, O_WRONLY | O_CREAT | O_TRUNC, statbuf.st_mode);
if (fd == -1)
{
perror(NULL);
return -1;
}
char *content = malloc(statbuf.st_size);
if (content == NULL ||
read(archive_fd, content, statbuf.st_size) == -1 ||
lseek(archive_fd, RECORD_SIZE - statbuf.st_size % RECORD_SIZE, SEEK_CUR) == -1 ||
write(fd, content, statbuf.st_size) == -1)
{
perror(NULL);
return -1;
}
break;
default:
return -1;
}
}
return 0;
}
int archive_header_iter(int archive_fd, bool verbose, int (*f)(t_header*, struct stat*, bool))
{
char record[RECORD_SIZE];
struct stat statbuf;
t_header header;
while (true)
{
if (record_read(archive_fd, record) == -1)
return -1;
if (record_is_blank(record))
{
if (record_read(archive_fd, record) == -1)
return -1;
if (record_is_blank(record))
break;
else
return -1;
}
if (header_parse(record, &statbuf, &header) == -1)
return -1;
if (f(&header, &statbuf, verbose) == -1)
return -1;
if (header.file_type[0] == '0' &&
lseek(archive_fd, statbuf.st_size + (RECORD_SIZE - statbuf.st_size % RECORD_SIZE), SEEK_CUR) == -1)
{
perror(NULL);
return -1;
}
}
return 0;
}
int archive_list_func(t_header *header, struct stat *statbuf, bool verbose)
{
if (!verbose)
put_file_name(header->file_name);
else
put_file_verbose(header, statbuf);
return 0;
}
int archive_list(int archive_fd, bool verbose)
{
return archive_header_iter(archive_fd, verbose, archive_list_func);
}
int archive_diff_func(t_header *header, struct stat *statbuf, bool verbose)
{
struct stat current_statbuf;
if (verbose)
put_file_name(header->file_name);
if (stat(header->file_name, ¤t_statbuf) == -1)
return -1;
if (S_ISDIR(current_statbuf.st_mode))
return 0;
if (statbuf->st_uid != current_statbuf.st_uid)
printf("%s: Uid differs\n", header->file_name);
if (statbuf->st_gid != current_statbuf.st_gid)
printf("%s: Gid differs\n", header->file_name);
if (statbuf->st_mtime != current_statbuf.st_mtime)
printf("%s: Mod time differs\n", header->file_name);
if (statbuf->st_size != current_statbuf.st_size)
printf("%s: Size differs\n", header->file_name);
return 0;
}
int archive_diff(int archive_fd, bool verbose)
{
return archive_header_iter(archive_fd, verbose, archive_diff_func);
}
int archive_get_fd(t_args *args)
{
int fd;
bool is_read;
is_read = args->action == ACTION_DIFF ||
args->action == ACTION_LIST ||
args->action == ACTION_EXTRACT;
if (args->archive_name == NULL)
return is_read ? STDIN_FILENO : STDOUT_FILENO;
if (is_read)
fd = open(args->archive_name, O_RDONLY);
else
fd = open(args->archive_name, O_WRONLY | O_CREAT | O_TRUNC, DEFAULT_UMASK);
if (fd == -1)
{
perror("archive fd");
return -1;
}
return fd;
}
int archive_dispatch_action(int archive_fd, t_args *args)
{
bool verbose = args->flags & FLAG_VERBOSE;
switch (args->action)
{
case ACTION_CREATE:
return archive_create(archive_fd, args->files, verbose);
case ACTION_EXTRACT:
return archive_extract(archive_fd, verbose);
case ACTION_LIST:
return archive_list(archive_fd, verbose);
case ACTION_DIFF:
return archive_diff(archive_fd, verbose);
default:
return -1;
}
return 0;
}
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