-/* -*- c-file-style: "linux" -*-
+/*
+ * Socket and pipe I/O utilities used in rsync.
*
- * Copyright (C) 1996-2001 by Andrew Tridgell
- * Copyright (C) Paul Mackerras 1996
- * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
+ * Copyright (C) 1996-2001 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
+ * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
-/**
- * @file io.c
- *
- * Socket and pipe I/O utilities used in rsync.
- *
- * rsync provides its own multiplexing system, which is used to send
- * stderr and stdout over a single socket. We need this because
- * stdout normally carries the binary data stream, and stderr all our
- * error messages.
+/* Rsync provides its own multiplexing system, which is used to send
+ * stderr and stdout over a single socket.
*
* For historical reasons this is off during the start of the
* connection, but it's switched on quite early using
- * io_start_multiplex_out() and io_start_multiplex_in().
- **/
+ * io_start_multiplex_out() and io_start_multiplex_in(). */
#include "rsync.h"
extern int csum_length;
extern int checksum_seed;
extern int protocol_version;
-extern int remove_sent_files;
+extern int remove_source_files;
extern int preserve_hard_links;
extern char *filesfrom_host;
extern struct stats stats;
int batch_fd = -1;
int batch_gen_fd = -1;
-/**
- * The connection might be dropped at some point; perhaps because the
- * remote instance crashed. Just giving the offset on the stream is
- * not very helpful. So instead we try to make io_phase_name point to
- * something useful.
- *
- * For buffered/multiplexed I/O these names will be somewhat
- * approximate; perhaps for ease of support we would rather make the
- * buffer always flush when a single application-level I/O finishes.
- *
- * @todo Perhaps we want some simple stack functionality, but there's
- * no need to overdo it.
- **/
-const char *io_write_phase = phase_unknown;
-const char *io_read_phase = phase_unknown;
-
/* Ignore an EOF error if non-zero. See whine_about_eof(). */
int kluge_around_eof = 0;
static int active_filecnt = 0;
static OFF_T active_bytecnt = 0;
+static char int_byte_cnt[256] = {
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 00 - 0F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 10 - 1F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 20 - 2F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 30 - 3F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 40 - 4F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 50 - 5F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 60 - 6F */
+ 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 70 - 7F */
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* 80 - 8F */
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* 90 - 9F */
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* A0 - AF */
+ 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, /* B0 - BF */
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* C0 - CF */
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, /* D0 - DF */
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, /* E0 - EF */
+ 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, /* F0 - FF */
+};
+
static void read_loop(int fd, char *buf, size_t len);
struct flist_ndx_item {
}
/* Add a message to the pending MSG_* list. */
-static void msg_list_add(struct msg_list *lst, int code, char *buf, int len)
+static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len)
{
struct msg_list_item *m;
int sz = len + 4 + sizeof m[0] - 1;
exit_cleanup(RERR_STREAMIO);
}
read_loop(fd, buf, 4);
- if (remove_sent_files)
+ if (remove_source_files)
decrement_active_files(IVAL(buf,0));
flist_ndx_push(&redo_list, IVAL(buf,0));
break;
exit_cleanup(RERR_STREAMIO);
}
read_loop(fd, buf, len);
- if (defer_forwarding_messages)
- msg_list_add(&msg2sndr, MSG_DELETED, buf, len);
- else
- io_multiplex_write(MSG_DELETED, buf, len);
+ send_msg(MSG_DELETED, buf, len);
break;
case MSG_SUCCESS:
if (len != 4 || !am_generator) {
exit_cleanup(RERR_STREAMIO);
}
read_loop(fd, buf, len);
- if (remove_sent_files) {
+ if (remove_source_files) {
decrement_active_files(IVAL(buf,0));
- if (defer_forwarding_messages)
- msg_list_add(&msg2sndr, MSG_SUCCESS, buf, len);
- else
- io_multiplex_write(MSG_SUCCESS, buf, len);
+ send_msg(MSG_SUCCESS, buf, len);
}
if (preserve_hard_links)
flist_ndx_push(&hlink_list, IVAL(buf,0));
if (n >= sizeof buf)
n = sizeof buf - 1;
read_loop(fd, buf, n);
- if (am_generator && am_server && defer_forwarding_messages)
- msg_list_add(&msg2sndr, tag, buf, n);
- else
- rwrite((enum logcode)tag, buf, n);
+ rwrite((enum logcode)tag, buf, n);
len -= n;
}
break;
default:
- rprintf(FERROR, "unknown message %d:%d\n", tag, len);
+ rprintf(FERROR, "unknown message %d:%d [%s]\n",
+ tag, len, who_am_i());
exit_cleanup(RERR_STREAMIO);
}
}
/* This is used by the generator to limit how many file transfers can
- * be active at once when --remove-sent-files is specified. Without
+ * be active at once when --remove-source-files is specified. Without
* this, sender-side deletions were mostly happening at the end. */
void increment_active_files(int ndx, int itemizing, enum logcode code)
{
}
active_filecnt++;
- active_bytecnt += the_file_list->files[ndx]->length;
+ active_bytecnt += F_LENGTH(the_file_list->files[ndx]);
}
void decrement_active_files(int ndx)
{
active_filecnt--;
- active_bytecnt -= the_file_list->files[ndx]->length;
+ active_bytecnt -= F_LENGTH(the_file_list->files[ndx]);
}
/* Try to push messages off the list onto the wire. If we leave with more
return 1;
}
-void send_msg(enum msgcode code, char *buf, int len)
+int send_msg(enum msgcode code, const char *buf, int len)
{
if (msg_fd_out < 0) {
- io_multiplex_write(code, buf, len);
- return;
+ if (!defer_forwarding_messages)
+ return io_multiplex_write(code, buf, len);
+ if (!io_multiplexing_out)
+ return 0;
+ msg_list_add(&msg2sndr, code, buf, len);
+ return 1;
}
msg_list_add(&msg2genr, code, buf, len);
msg2genr_flush(NORMAL_FLUSH);
+ return 1;
+}
+
+void send_msg_int(enum msgcode code, int num)
+{
+ char numbuf[4];
+ SIVAL(numbuf, 0, num);
+ send_msg(code, numbuf, 4);
}
int get_redo_num(int itemizing, enum logcode code)
if (cnt < 0 && (errno == EWOULDBLOCK
|| errno == EINTR || errno == EAGAIN)) {
struct timeval tv;
- fd_set fds;
- FD_ZERO(&fds);
- FD_SET(fd, &fds);
+ fd_set r_fds, e_fds;
+ FD_ZERO(&r_fds);
+ FD_SET(fd, &r_fds);
+ FD_ZERO(&e_fds);
+ FD_SET(fd, &e_fds);
tv.tv_sec = select_timeout;
tv.tv_usec = 0;
- if (!select(fd+1, &fds, NULL, NULL, &tv))
+ if (!select(fd+1, &r_fds, NULL, &e_fds, &tv))
check_timeout();
+ if (FD_ISSET(fd, &e_fds)) {
+ rsyserr(FINFO, errno,
+ "select exception on fd %d", fd);
+ }
continue;
}
if (cnt != 1)
stats.total_read += total;
}
-int read_shortint(int f)
+unsigned short read_shortint(int f)
{
- uchar b[2];
- readfd(f, (char *)b, 2);
- return (b[1] << 8) + b[0];
+ char b[2];
+ readfd(f, b, 2);
+ return (UVAL(b, 1) << 8) + UVAL(b, 0);
}
int32 read_int(int f)
char b[4];
int32 num;
- readfd(f,b,4);
- num = IVAL(b,0);
- if (num == (int32)0xffffffff)
- return -1;
+ readfd(f, b, 4);
+ num = IVAL(b, 0);
+#if SIZEOF_INT32 > 4
+ if (num & (int32)0x80000000)
+ num |= ~(int32)0xffffffff;
+#endif
return num;
}
int64 read_longint(int f)
{
int64 num;
- char b[8];
- num = read_int(f);
+ char b[9];
+
+ if (protocol_version < 30) {
+ num = read_int(f);
- if ((int32)num != (int32)0xffffffff)
- return num;
+ if ((int32)num != (int32)0xffffffff)
+ return num;
#if SIZEOF_INT64 < 8
- rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
- exit_cleanup(RERR_UNSUPPORTED);
+ rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+ exit_cleanup(RERR_UNSUPPORTED);
#else
- readfd(f,b,8);
- num = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
+ readfd(f, b, 8);
+ num = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
+#endif
+ } else {
+ int cnt;
+ readfd(f, b, 3);
+ cnt = int_byte_cnt[CVAL(b, 0)];
+#if SIZEOF_INT64 < 8
+ if (cnt > 5 || (cnt == 5 && (CVAL(b,0)&0x3F || CVAL(b,1)&0x80))) {
+ rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+ exit_cleanup(RERR_UNSUPPORTED);
+ }
+#endif
+ if (cnt > 3)
+ readfd(f, b + 3, cnt - 3);
+ switch (cnt) {
+ case 3:
+ num = NVAL3(b, 0);
+ break;
+ case 4:
+ num = NVAL4(b, 0x80);
+ break;
+ case 5:
+ num = NVAL5(b, 0xC0);
+ break;
+#if SIZEOF_INT64 >= 8
+ case 6:
+ num = NVAL6(b, 0xE0);
+ break;
+ case 7:
+ num = NVAL7(b, 0xF0);
+ break;
+ case 8:
+ num = NVAL8(b, 0xF8);
+ break;
+ case 9:
+ num = NVAL8(b+1, 0);
+ break;
#endif
+ default:
+ exit_cleanup(RERR_PROTOCOL); /* impossible... */
+ }
+ }
return num;
}
-void read_buf(int f,char *buf,size_t len)
+void read_buf(int f, char *buf, size_t len)
{
readfd(f,buf,len);
}
-void read_sbuf(int f,char *buf,size_t len)
+void read_sbuf(int f, char *buf, size_t len)
{
readfd(f, buf, len);
buf[len] = '\0';
static void sleep_for_bwlimit(int bytes_written)
{
static struct timeval prior_tv;
- static long total_written = 0;
+ static long total_written = 0;
struct timeval tv, start_tv;
long elapsed_usec, sleep_usec;
if (!bwlimit_writemax)
return;
- total_written += bytes_written;
+ total_written += bytes_written;
gettimeofday(&start_tv, NULL);
if (prior_tv.tv_sec) {
*
* This function underlies the multiplexing system. The body of the
* application never calls this function directly. */
-static void writefd_unbuffered(int fd,char *buf,size_t len)
+static void writefd_unbuffered(int fd, const char *buf, size_t len)
{
size_t n, total = 0;
- fd_set w_fds, r_fds;
+ fd_set w_fds, r_fds, e_fds;
int maxfd, count, cnt, using_r_fds;
int defer_save = defer_forwarding_messages;
struct timeval tv;
while (total < len) {
FD_ZERO(&w_fds);
- FD_SET(fd,&w_fds);
+ FD_SET(fd, &w_fds);
+ FD_ZERO(&e_fds);
+ FD_SET(fd, &e_fds);
maxfd = fd;
if (msg_fd_in >= 0) {
FD_ZERO(&r_fds);
- FD_SET(msg_fd_in,&r_fds);
+ FD_SET(msg_fd_in, &r_fds);
if (msg_fd_in > maxfd)
maxfd = msg_fd_in;
using_r_fds = 1;
errno = 0;
count = select(maxfd + 1, using_r_fds ? &r_fds : NULL,
- &w_fds, NULL, &tv);
+ &w_fds, &e_fds, &tv);
if (count <= 0) {
if (count < 0 && errno == EBADF)
continue;
}
+ if (FD_ISSET(fd, &e_fds)) {
+ rsyserr(FINFO, errno,
+ "select exception on fd %d", fd);
+ }
+
if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds))
read_msg_fd();
if (fd == sock_f_out)
close_multiplexing_out();
rsyserr(FERROR, errno,
- "writefd_unbuffered failed to write %ld bytes: phase \"%s\" [%s]",
- (long)len, io_write_phase, who_am_i());
+ "writefd_unbuffered failed to write %ld bytes [%s]",
+ (long)len, who_am_i());
/* If the other side is sending us error messages, try
* to grab any messages they sent before they died. */
while (fd == sock_f_out && io_multiplexing_in) {
if (defer_forwarding_messages)
return;
- while (msg2sndr.head) {
+ while (msg2sndr.head && io_multiplexing_out) {
struct msg_list_item *m = msg2sndr.head;
if (!(msg2sndr.head = m->next))
msg2sndr.tail = NULL;
* Write an message to a multiplexed stream. If this fails then rsync
* exits.
**/
-static void mplex_write(enum msgcode code, char *buf, size_t len)
+static void mplex_write(enum msgcode code, const char *buf, size_t len)
{
char buffer[1024];
size_t n = len;
iobuf_out_cnt = 0;
}
-static void writefd(int fd,char *buf,size_t len)
+static void writefd(int fd, const char *buf, size_t len)
{
if (fd == msg_fd_out) {
rprintf(FERROR, "Internal error: wrong write used in receiver.\n");
}
}
-void write_shortint(int f, int x)
+void write_shortint(int f, unsigned short x)
{
- uchar b[2];
- b[0] = x;
- b[1] = x >> 8;
- writefd(f, (char *)b, 2);
+ char b[2];
+ b[0] = (char)x;
+ b[1] = (char)(x >> 8);
+ writefd(f, b, 2);
}
-void write_int(int f,int32 x)
+void write_int(int f, int32 x)
{
char b[4];
- SIVAL(b,0,x);
- writefd(f,b,4);
-}
-
-void write_int_named(int f, int32 x, const char *phase)
-{
- io_write_phase = phase;
- write_int(f, x);
- io_write_phase = phase_unknown;
+ SIVAL(b, 0, x);
+ writefd(f, b, 4);
}
/*
*/
void write_longint(int f, int64 x)
{
- char b[8];
+ char b[12];
- if (x <= 0x7FFFFFFF) {
- write_int(f, (int)x);
- return;
+#if SIZEOF_INT64 < 8
+ if (x < 0 || x > 0x7FFFFFFF) {
+ rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+ exit_cleanup(RERR_UNSUPPORTED);
}
+#endif
+ if (protocol_version < 30) {
+ char * const s = b+4;
+ SIVAL(s, 0, x);
#if SIZEOF_INT64 < 8
- rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
- exit_cleanup(RERR_UNSUPPORTED);
+ writefd(f, s, 4);
#else
- write_int(f, (int32)0xFFFFFFFF);
- SIVAL(b,0,(x&0xFFFFFFFF));
- SIVAL(b,4,((x>>32)&0xFFFFFFFF));
+ if (x <= 0x7FFFFFFF && x >= 0) {
+ writefd(f, s, 4);
+ return;
+ }
- writefd(f,b,8);
+ memset(b, 0xFF, 4);
+ SIVAL(s, 4, x >> 32);
+ writefd(f, b, 12);
+ } else if (x < 0) {
+ goto all_bits;
+#endif
+ } else if (x < ((int32)1<<(3*8-1))) {
+ b[0] = (char)(x >> 16);
+ b[1] = (char)(x >> 8);
+ b[2] = (char)x;
+ writefd(f, b, 3);
+ } else if (x < ((int64)1<<(4*8-2))) {
+ b[0] = (char)((x >> 24) | 0x80);
+ b[1] = (char)(x >> 16);
+ b[2] = (char)(x >> 8);
+ b[3] = (char)x;
+ writefd(f, b, 4);
+#if SIZEOF_INT64 < 8
+ } else {
+ b[0] = 0xC0;
+ b[1] = (char)(x >> 24);
+ b[2] = (char)(x >> 16);
+ b[3] = (char)(x >> 8);
+ b[4] = (char)x;
+ writefd(f, b, 5);
+ }
+#else
+ } else if (x < ((int64)1<<(5*8-3))) {
+ b[0] = (char)((x >> 32) | 0xC0);
+ b[1] = (char)(x >> 24);
+ b[2] = (char)(x >> 16);
+ b[3] = (char)(x >> 8);
+ b[4] = (char)x;
+ writefd(f, b, 5);
+ } else if (x < ((int64)1<<(6*8-4))) {
+ b[0] = (char)((x >> 40) | 0xE0);
+ b[1] = (char)(x >> 32);
+ b[2] = (char)(x >> 24);
+ b[3] = (char)(x >> 16);
+ b[4] = (char)(x >> 8);
+ b[5] = (char)x;
+ writefd(f, b, 6);
+ } else if (x < ((int64)1<<(7*8-5))) {
+ b[0] = (char)((x >> 48) | 0xF0);
+ b[1] = (char)(x >> 40);
+ b[2] = (char)(x >> 32);
+ b[3] = (char)(x >> 24);
+ b[4] = (char)(x >> 16);
+ b[5] = (char)(x >> 8);
+ b[6] = (char)x;
+ writefd(f, b, 7);
+ } else if (x < ((int64)1<<(8*8-6))) {
+ b[0] = (char)((x >> 56) | 0xF8);
+ b[1] = (char)(x >> 48);
+ b[2] = (char)(x >> 40);
+ b[3] = (char)(x >> 32);
+ b[4] = (char)(x >> 24);
+ b[5] = (char)(x >> 16);
+ b[6] = (char)(x >> 8);
+ b[7] = (char)x;
+ writefd(f, b, 8);
+ } else {
+ all_bits:
+ b[0] = (char)0xFC;
+ b[1] = (char)(x >> 56);
+ b[2] = (char)(x >> 48);
+ b[3] = (char)(x >> 40);
+ b[4] = (char)(x >> 32);
+ b[5] = (char)(x >> 24);
+ b[6] = (char)(x >> 16);
+ b[7] = (char)(x >> 8);
+ b[8] = (char)x;
+ writefd(f, b, 9);
+ }
#endif
}
-void write_buf(int f,char *buf,size_t len)
+void write_buf(int f, const char *buf, size_t len)
{
writefd(f,buf,len);
}
/** Write a string to the connection */
-void write_sbuf(int f, char *buf)
+void write_sbuf(int f, const char *buf)
{
writefd(f, buf, strlen(buf));
}
writefd(f, (char *)&c, 1);
}
-void write_vstring(int f, char *str, int len)
+void write_vstring(int f, const char *str, int len)
{
uchar lenbuf[3], *lb = lenbuf;
}
/** Write an message to the multiplexed data stream. */
-int io_multiplex_write(enum msgcode code, char *buf, size_t len)
+int io_multiplex_write(enum msgcode code, const char *buf, size_t len)
{
if (!io_multiplexing_out)
return 0;
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff