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Overview
Comment:Changed the way "file_sync" works to a less latency-driven approach.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 223caea2dc39ed80da8d9f1214f3602b34523ed4
User & Date: rkeene 2006-01-30 04:43:13
Context
2006-03-11
22:02
Changed file_sync to only lseek() when needed Added strsep() replacement code Modified build process to create Win32 binaries on release Added some comments to the sample configuration file Added stub for new configuration option "NotifyServer" Made backuppcd-passwd prompt for a password to be read froms stdin check-in: 33d0a0970f user: rkeene tags: trunk
2006-01-30
04:43
Changed the way "file_sync" works to a less latency-driven approach. check-in: 223caea2dc user: rkeene tags: trunk
2006-01-23
09:59
Changed version to BackupPCd 0.1.2 check-in: 4e2c1a856d user: rkeene tags: trunk
Changes
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Changes to tools/file_sync.c. 

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#include "compat.h"
#include "md4.h"
#include "net.h"












#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif

uint64_t net_bytesout = 0;
uint64_t net_bytesin = 0;

extern char *optarg;
extern int optind, opterr, optopt;

static int print_help(int ret) {
	fprintf(stderr, "Usage: file_sync -t <host> <port> <file>\n");
	fprintf(stderr, "Usage: file_sync -r <port> <file>\n");
	return(ret);
}

#if 0
static void print_hash(FILE *fp, const unsigned char *hash) {
	int i;




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#include "compat.h"
#include "md4.h"
#include "net.h"

#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifndef HAVE_LIMITS_H
#include <limits.h>
#endif

#ifndef INT_MAX
#define INT_MAX (0x7fffffff)
#endif

#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif

uint64_t net_bytesout = 0;
uint64_t net_bytesin = 0;

extern char *optarg;
extern int optind, opterr, optopt;

static int print_help(int ret) {
	fprintf(stderr, "Usage: file_sync -t <host> <port> <file> [<blocksize>]\n");
	fprintf(stderr, "Usage: file_sync -r <port> <file>\n");
	return(ret);
}

#if 0
static void print_hash(FILE *fp, const unsigned char *hash) {
	int i;
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		if (bytestowrite >= INT_MAX) {
			bytestowrite = INT_MAX - 1;
		}

		write_ret = write(fd, buf, bytestowrite);
		if (write_ret < 0) {

			retval = -1;

			break;
		}

		if (write_ret == 0) {
			break;
		}

		count -= write_ret;
		buf += write_ret;
		retval += write_ret;
	}

	return(retval);
}

static ssize_t read_net(int fd, void *buf, size_t count) {
	ssize_t retval;

	retval = read(fd, buf, count);

	if (retval > 0) {
		net_bytesin += retval;
	}

	return(retval);
}

static ssize_t write_net(int fd, void *buf, size_t count) {
	ssize_t retval;

	retval = write(fd, buf, count);
	if (retval > 0) {
		net_bytesout += retval;
	}

	return(retval);
}

static ssize_t read_large_net(int fd, void *buf, size_t count) {
	ssize_t retval;

	retval = read_large(fd, buf, count);








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		if (bytestowrite >= INT_MAX) {
			bytestowrite = INT_MAX - 1;
		}

		write_ret = write(fd, buf, bytestowrite);
		if (write_ret < 0) {
			if (retval == 0) {
				retval = -1;
			}
			break;
		}

		if (write_ret == 0) {
			break;
		}

		count -= write_ret;
		buf += write_ret;
		retval += write_ret;
	}
























	return(retval);
}

static ssize_t read_large_net(int fd, void *buf, size_t count) {
	ssize_t retval;

	retval = read_large(fd, buf, count);
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	if (retval > 0) {
		net_bytesout += retval;
	}

	return(retval);
}

int sync_transmit(const char *host, int port, const char *file) {
	rsaref_MD4_CTX mdctx;
	unsigned char md4buf[16];
	uint64_t filesize;
	uint32_t blocksize;
	uint8_t blockok;
	ssize_t read_ret, write_ret;
	char *buf;
	off_t lseek_ret;
	int retval = 0;
	int sockfd;
	int fd;


	fd = open(file, O_RDONLY | O_LARGEFILE);
	if (fd < 0) {
		CHECKPOINT;
		return(-1);

	}

	lseek_ret = lseek(fd, 0, SEEK_END);
	if (lseek_ret < 0) {
		close(fd);
		CHECKPOINT;
		return(-1);
	}

	filesize = lseek_ret;













	lseek(fd, 0, SEEK_SET);

	sockfd = net_connect_tcp(host, port);
	if (sockfd < 0) {
		close(fd);
		CHECKPOINT;
		return(-1);
	}

	blocksize = (128 * 1024);

	buf = calloc(blocksize, 1);
	if (!buf) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}

	filesize = htonll(filesize);
	blocksize = htonl(blocksize);

	write_ret = write_net(sockfd, &filesize, sizeof(filesize));
	if (write_ret != sizeof(filesize)) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}

	write_ret = write_net(sockfd, &blocksize, sizeof(blocksize));
	if (write_ret != sizeof(blocksize)) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}


	blocksize = ntohl(blocksize);

	while (1) {
		read_ret = read_large(fd, buf, blocksize);
		if (read_ret < 0) {
			retval = -1;
			CHECKPOINT;
			break;
		}

		if (read_ret == 0) {
			CHECKPOINT;
			break;
		}

		rsaref_MD4Init(&mdctx);
		rsaref_MD4Update(&mdctx, buf, read_ret);
		rsaref_MD4Final(md4buf, &mdctx);

		write_ret = write_net(sockfd, md4buf, sizeof(md4buf));
		if (write_ret != sizeof(md4buf)) {
			retval = -1;
			CHECKPOINT;
			break;
		}

		read_ret = read_net(sockfd, &blockok, sizeof(blockok));


























		if (read_ret != sizeof(blockok)) {





			retval = -1;
			CHECKPOINT;
			break;
		}

		if (!blockok) {
			write_ret = write_large_net(sockfd, buf, blocksize);
			if (write_ret != blocksize) {


				retval = -1;
				CHECKPOINT;





				break;
			}
		}
	}

	close(fd);
	close(sockfd);

	return(retval);
}

int sync_receive(int port, const char *file) {
	rsaref_MD4_CTX mdctx;
	unsigned char md4buf[16], check_md4buf[16];
	uint64_t filesize;
	uint32_t blocksize;
	uint8_t blockok;

	ssize_t cur_read_ret, read_ret, write_ret;
	size_t bytestowrite;
	off_t lseek_ret;
	char *buf;
	int sockfd, master_sockfd;
	int retval = 0;
	int fd;
	int skipbytes;


	fd = open(file, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
	if (fd < 0) {
		CHECKPOINT;
		return(-1);
	}









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	if (retval > 0) {
		net_bytesout += retval;
	}

	return(retval);
}

int sync_transmit(const char *host, int port, const char *file, uint32_t blocksize) {
	rsaref_MD4_CTX mdctx;
	unsigned char md4buf[16];
	uint64_t filesize;
	uint32_t blockok_size, blockidx;
	uint8_t *blockok, blockok_val;
	ssize_t read_ret, write_ret;
	char *buf;
	off_t lseek_ret;
	int retval = 0;
	int sockfd;
	int fd;
	int i;

	fd = open(file, O_RDONLY | O_LARGEFILE);
	if (fd < 0) {
		CHECKPOINT;
		return(-1);

	}

	lseek_ret = lseek(fd, 0, SEEK_END);
	if (lseek_ret < 0) {
		close(fd);
		CHECKPOINT;
		return(-1);
	}

	filesize = lseek_ret;

	blockok_size = filesize / (8 * blocksize);
	if ((filesize % (8 * blocksize)) != 0) {
		blockok_size++;
	}

	blockok = malloc(blockok_size);
	if (!blockok) {
		close(fd);
		CHECKPOINT;
		return(-1);
	}

	lseek(fd, 0, SEEK_SET);

	sockfd = net_connect_tcp(host, port);
	if (sockfd < 0) {
		close(fd);
		CHECKPOINT;
		return(-1);
	}



	buf = calloc(blocksize, 1);
	if (!buf) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}

	filesize = htonll(filesize);
	blocksize = htonl(blocksize);

	write_ret = write_large_net(sockfd, &filesize, sizeof(filesize));
	if (write_ret != sizeof(filesize)) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}

	write_ret = write_large_net(sockfd, &blocksize, sizeof(blocksize));
	if (write_ret != sizeof(blocksize)) {
		close(fd);
		close(sockfd);
		CHECKPOINT;
		return(-1);
	}

	filesize = ntohll(filesize);
	blocksize = ntohl(blocksize);

	while (1) {
		read_ret = read_large(fd, buf, blocksize);
		if (read_ret < 0) {
			retval = -1;
			CHECKPOINT;
			break;
		}

		if (read_ret == 0) {
			CHECKPOINT;
			break;
		}

		rsaref_MD4Init(&mdctx);
		rsaref_MD4Update(&mdctx, buf, read_ret);
		rsaref_MD4Final(md4buf, &mdctx);

		write_ret = write_large_net(sockfd, md4buf, sizeof(md4buf));
		if (write_ret != sizeof(md4buf)) {
			retval = -1;
			CHECKPOINT;
			break;
		}
	}

	if (retval != -1) {
		read_ret = read_large_net(sockfd, blockok, blockok_size);

		if (read_ret != blockok_size) {
			retval = -1;
			CHECKPOINT;
		}
	}

	if (retval != -1) {
		for (blockidx = 0; blockidx < blockok_size; blockidx++) {
			for (i = 0; i < 8; i++) {
				blockok_val = blockok[blockidx] & (1<<i);
				if (!blockok_val) {
					lseek_ret = lseek(fd, (blockidx * 8 + i) * blocksize, SEEK_SET);
					if (lseek_ret != ((blockidx * 8 + i) * blocksize)) {
						retval = -1;
						CHECKPOINT;
						break;
					}

					if (lseek_ret >= filesize) {
						continue;
					}

					read_ret = read_large(fd, buf, blocksize);
					if (read_ret != blocksize) {
						if ((lseek_ret + read_ret) != filesize || read_ret < 0) {
							SPOTVAR_I(blockidx);
							SPOTVAR_LLU(lseek_ret);
							SPOTVAR_LLU(read_ret);
							SPOTVAR_LLU(filesize);
							retval = -1;
							CHECKPOINT;
							break;
						}
					}

					write_ret = write_large_net(sockfd, buf, read_ret);
					if (write_ret != read_ret) {
						SPOTVAR_LLU(write_ret);
						SPOTVAR_LLU(read_ret);
						retval = -1;
						CHECKPOINT;
						break;
					}
				}
			}
			if (retval == -1) {
				break;
			}
		}
	}

	close(fd);
	close(sockfd);

	return(retval);
}

int sync_receive(int port, const char *file) {
	rsaref_MD4_CTX mdctx;
	unsigned char md4buf[16], check_md4buf[16];
	uint64_t filesize, filesize_s;
	uint32_t blocksize;
	uint32_t blockok_size, blockidx = 0;
	uint8_t *blockok, blockok_val;
	ssize_t cur_read_ret, read_ret, write_ret;
	size_t bytestowrite;
	off_t lseek_ret;
	char *buf;
	int sockfd, master_sockfd;
	int retval = 0;
	int fd;
	int skipbytes;
	int i = 0;

	fd = open(file, O_RDWR | O_CREAT | O_LARGEFILE, 0600);
	if (fd < 0) {
		CHECKPOINT;
		return(-1);
	}
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	if (sockfd < 0) {
		close(fd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	read_ret = read_net(sockfd, &filesize, sizeof(filesize));
	if (read_ret != sizeof(filesize)) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	read_ret = read_net(sockfd, &blocksize, sizeof(blocksize));
	if (read_ret != sizeof(blocksize)) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	filesize = ntohll(filesize);
	blocksize = ntohl(blocksize);















	buf = calloc(blocksize, 1);
	if (!buf) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;








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	if (sockfd < 0) {
		close(fd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	read_ret = read_large_net(sockfd, &filesize, sizeof(filesize));
	if (read_ret != sizeof(filesize)) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	read_ret = read_large_net(sockfd, &blocksize, sizeof(blocksize));
	if (read_ret != sizeof(blocksize)) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	filesize_s = filesize = ntohll(filesize);
	blocksize = ntohl(blocksize);

	blockok_size = filesize / (8 * blocksize);
	if ((filesize % (8 * blocksize)) != 0) {
		blockok_size++;
	}

	blockok = malloc(blockok_size);
	if (!blockok) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
		return(-1);
	}

	buf = calloc(blocksize, 1);
	if (!buf) {
		close(fd);
		close(sockfd);
		close(master_sockfd);
		CHECKPOINT;
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			skipbytes = 0;
		}

		rsaref_MD4Init(&mdctx);
		rsaref_MD4Update(&mdctx, buf, read_ret);
		rsaref_MD4Final(md4buf, &mdctx);

		read_ret = read_net(sockfd, check_md4buf, sizeof(check_md4buf));
		if (read_ret != sizeof(check_md4buf)) {
			retval = -1;
			CHECKPOINT;
			break;
		}

		if (memcmp(check_md4buf, md4buf, sizeof(md4buf)) == 0) {
			blockok = 1;
		} else {
			blockok = 0;
		}

		write_ret = write_net(sockfd, &blockok, sizeof(blockok));

		if (write_ret != sizeof(blockok)) {

			retval = -1;




			CHECKPOINT;
			break;

		}

		if (blockok && skipbytes > 0) {
			lseek_ret = lseek(fd, skipbytes, SEEK_CUR);
			if (lseek_ret < 0) {
				retval = -1;
				CHECKPOINT;
				break;
			}
		}





		if (!blockok) {
			read_ret = read_large_net(sockfd, buf, blocksize);
			if (read_ret != blocksize) {
				retval = -1;
				CHECKPOINT;
				break;
			}




			if (cur_read_ret) {

				lseek_ret = lseek(fd, ((off_t) cur_read_ret) * -1, SEEK_CUR);


				if (lseek_ret < 0) {


					retval = -1;
					CHECKPOINT;
					break;
				}
			}

			write_ret = write(fd, buf, bytestowrite);
			if (write_ret != bytestowrite) {
				retval = -1;
				CHECKPOINT;
				break;
			}
		}

		filesize -= bytestowrite;



	}

	close(fd);
	close(sockfd);
	close(master_sockfd);

	return(retval);
}

int main(int argc, char **argv) {
	char *mode, *host, *port_str, *file;

	int func_ret;
	int retval = EXIT_SUCCESS;
	int port;

	if (argc < 2) {
		return(print_help(EXIT_FAILURE));
	}

	



	mode = argv[1];
	if (strcmp(mode, "-t") == 0) {
		if (argc != 5) {
			return(print_help(EXIT_FAILURE));
		}

		host = argv[2];
		port_str = argv[3];
		file = argv[4];







		port = strtoul(port_str, NULL, 10);

		func_ret = sync_transmit(host, port, file); 
		if (func_ret < 0) {
			fprintf(stderr, "Failed.\n");
			retval = 1;
		}
	} else if (strcmp(mode, "-r") == 0) {
		if (argc != 4) {
			return(print_help(EXIT_FAILURE));








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			skipbytes = 0;
		}

		rsaref_MD4Init(&mdctx);
		rsaref_MD4Update(&mdctx, buf, read_ret);
		rsaref_MD4Final(md4buf, &mdctx);

		read_ret = read_large_net(sockfd, check_md4buf, sizeof(check_md4buf));
		if (read_ret != sizeof(check_md4buf)) {
			retval = -1;
			CHECKPOINT;
			break;
		}

		if (memcmp(check_md4buf, md4buf, sizeof(md4buf)) == 0) {
			blockok_val = 1;
		} else {
			blockok_val = 0;
		}

		if (i == 0 || i == 8) {
			if (i == 8) {
				blockidx++;
			}
			i = 0;
			blockok[blockidx] = 0;
		}
		blockok[blockidx] |= (blockok_val<<i);
		i++;


		filesize -= bytestowrite;
	}

	if (retval != -1) {
		write_ret = write_large_net(sockfd, blockok, blockok_size);
		if (write_ret != blockok_size) {
			retval = -1;


		}
	}

	if (retval != -1) {
		for (blockidx = 0; blockidx < blockok_size; blockidx++) {
			for (i = 0; i < 8; i++) {
				blockok_val = blockok[blockidx] & (1<<i);
				if (!blockok_val) {
					lseek_ret = lseek(fd, (blockidx * 8 + i) * blocksize, SEEK_SET);
					if (lseek_ret != ((blockidx * 8 + i) * blocksize)) {
						retval = -1;
						CHECKPOINT;
						break;
					}

					if (lseek_ret >= filesize_s) {
						continue;
					}

					read_ret = read_large_net(sockfd, buf, blocksize);
					if (read_ret != blocksize) {
						if ((lseek_ret + read_ret) != filesize_s || read_ret < 0) {
							SPOTVAR_I(blockidx);
							SPOTVAR_LLU(lseek_ret);
							SPOTVAR_LLU(read_ret);
							SPOTVAR_LLU(filesize_s);
							retval = -1;
							CHECKPOINT;
							break;
						}
					}

					write_ret = write_large(fd, buf, read_ret);
					if (write_ret != read_ret) {
						retval = -1;
						CHECKPOINT;
						break;
					}
				}
			}
			if (retval == -1) {
				break;
			}
		}
	}

	close(fd);
	close(sockfd);
	close(master_sockfd);

	return(retval);
}

int main(int argc, char **argv) {
	char *mode, *host, *port_str, *file, *blocksize_str;
	uint32_t blocksize;
	int func_ret;
	int retval = EXIT_SUCCESS;
	int port;

	if (argc < 2) {
		return(print_help(EXIT_FAILURE));
	}

#ifdef HAVE_SIGNAL
	signal(SIGPIPE, SIG_IGN);
#endif

	mode = argv[1];
	if (strcmp(mode, "-t") == 0) {
		if (argc < 5 || argc > 6) {
			return(print_help(EXIT_FAILURE));
		}

		host = argv[2];
		port_str = argv[3];
		file = argv[4];
		if (argc == 6) {
			blocksize_str = argv[5];
			blocksize = strtoul(blocksize_str, NULL, 0);
		} else {
			blocksize = 256 * 1024;
		}

		port = strtoul(port_str, NULL, 10);

		func_ret = sync_transmit(host, port, file, blocksize); 
		if (func_ret < 0) {
			fprintf(stderr, "Failed.\n");
			retval = 1;
		}
	} else if (strcmp(mode, "-r") == 0) {
		if (argc != 4) {
			return(print_help(EXIT_FAILURE));
︙︙

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