X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=scandir.cc;h=043d35eeba637f2cba740c7ae0ef0d5ac5d96596;hb=358b7ac6f741088838fb84979c9127976eb34fdf;hp=64aec8a03c466aed8e1327d1112447611df446a0;hpb=b821ea320164735dd6cc7ad9edaeaa1f558b676d;p=cumulus.git diff --git a/scandir.cc b/scandir.cc index 64aec8a..043d35e 100644 --- a/scandir.cc +++ b/scandir.cc @@ -4,6 +4,7 @@ #include #include #include +#include #include #include #include @@ -13,20 +14,58 @@ #include #include +#include "store.h" +#include "sha1.h" + using std::string; using std::vector; +static SegmentStore *segment_store; +static OutputStream *info_dump = NULL; + +static SegmentPartitioner *index_segment, *data_segment; + void scandir(const string& path); -void dumpfile(int fd) +/* Converts time to microseconds since the epoch. */ +int64_t encode_time(time_t time) +{ + return (int64_t)time * 1000000; +} + +void dumpfile(int fd, dictionary &file_info) { struct stat stat_buf; fstat(fd, &stat_buf); + int64_t size = 0; + + char buf[4096]; if ((stat_buf.st_mode & S_IFMT) != S_IFREG) { printf("file is no longer a regular file!\n"); return; } + + SHA1Checksum hash; + while (true) { + ssize_t res = read(fd, buf, sizeof(buf)); + if (res < 0) { + if (errno == EINTR) + continue; + printf("Error while reading: %m\n"); + return; + } else if (res == 0) { + break; + } else { + hash.process(buf, res); + OutputStream *block = data_segment->new_object(); + block->write(buf, res); + size += res; + } + } + + file_info["sha1"] = string((const char *)hash.checksum(), + hash.checksum_size()); } void scanfile(const string& path) @@ -34,24 +73,64 @@ void scanfile(const string& path) int fd; long flags; struct stat stat_buf; + char *buf; + ssize_t len; + + // Set to true if the item is a directory and we should recursively scan + bool recurse = false; + + dictionary file_info; + lstat(path.c_str(), &stat_buf); - printf("%s:\n", path.c_str()); - printf(" ino=%Ld, perm=%04o, uid=%d, gid=%d, nlink=%d, blksize=%d, size=%Ld\n", - (int64_t)stat_buf.st_ino, stat_buf.st_mode & 07777, - stat_buf.st_uid, stat_buf.st_gid, stat_buf.st_nlink, - (int)stat_buf.st_blksize, (int64_t)stat_buf.st_size); + printf("%s\n", path.c_str()); + + file_info["mode"] = encode_u16(stat_buf.st_mode & 07777); + file_info["atime"] = encode_u64(encode_time(stat_buf.st_atime)); + file_info["ctime"] = encode_u64(encode_time(stat_buf.st_ctime)); + file_info["mtime"] = encode_u64(encode_time(stat_buf.st_mtime)); + file_info["user"] = encode_u32(stat_buf.st_uid); + file_info["group"] = encode_u32(stat_buf.st_gid); + + char inode_type; switch (stat_buf.st_mode & S_IFMT) { case S_IFIFO: + inode_type = 'p'; + break; case S_IFSOCK: + inode_type = 's'; + break; case S_IFCHR: + inode_type = 'c'; + break; case S_IFBLK: + inode_type = 'b'; + break; case S_IFLNK: - printf(" special file\n"); + inode_type = 'l'; + + /* Use the reported file size to allocate a buffer large enough to read + * the symlink. Allocate slightly more space, so that we ask for more + * bytes than we expect and so check for truncation. */ + buf = new char[stat_buf.st_size + 2]; + len = readlink(path.c_str(), buf, stat_buf.st_size + 1); + if (len < 0) { + printf("error reading symlink: %m\n"); + } else if (len <= stat_buf.st_size) { + buf[len] = '\0'; + printf(" contents=%s\n", buf); + } else if (len > stat_buf.st_size) { + printf("error reading symlink: name truncated\n"); + } + + file_info["contents"] = buf; + + delete[] buf; break; case S_IFREG: - printf(" regular file\n"); + inode_type = '-'; + /* Be paranoid when opening the file. We have no guarantee that the * file was not replaced between the stat() call above and the open() * call below, so we might not even be opening a regular file. That @@ -70,21 +149,34 @@ void scanfile(const string& path) flags = fcntl(fd, F_GETFL); fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); - dumpfile(fd); + file_info["size"] = encode_u64(stat_buf.st_size); + dumpfile(fd, file_info); close(fd); break; case S_IFDIR: - printf(" directory\n"); - scandir(path); + inode_type = 'd'; + recurse = true; break; + + default: + fprintf(stderr, "Unknown inode type: mode=%x\n", stat_buf.st_mode); + return; } + + file_info["type"] = string(1, inode_type); + + info_dump->write_string(path); + info_dump->write_dictionary(file_info); + + // If we hit a directory, now that we've written the directory itself, + // recursively scan the directory. + if (recurse) + scandir(path); } void scandir(const string& path) { - printf("Scan directory: %s\n", path.c_str()); - DIR *dir = opendir(path.c_str()); if (dir == NULL) { @@ -106,7 +198,6 @@ void scandir(const string& path) for (vector::iterator i = contents.begin(); i != contents.end(); ++i) { const string& filename = *i; - printf(" d_name = '%s'\n", filename.c_str()); scanfile(path + "/" + filename); } @@ -115,7 +206,25 @@ void scandir(const string& path) int main(int argc, char *argv[]) { - scandir("."); + segment_store = new SegmentStore("."); + SegmentWriter *sw = segment_store->new_segment(); + info_dump = sw->new_object(); + + index_segment = new SegmentPartitioner(segment_store); + data_segment = new SegmentPartitioner(segment_store); + + string uuid = SegmentWriter::format_uuid(sw->get_uuid()); + printf("Backup UUID: %s\n", uuid.c_str()); + + try { + scanfile("."); + } catch (IOException e) { + fprintf(stderr, "IOException: %s\n", e.getError().c_str()); + } + + delete index_segment; + delete data_segment; + delete sw; return 0; }