From 2f03f956f425f03335005ba743f19b6ed3454248 Mon Sep 17 00:00:00 2001 From: Andrew Tridgell Date: Sat, 25 Jul 1998 02:25:22 +0000 Subject: [PATCH] rsync.c was getting a bit unwieldy so I split the code into 3 modules, for the 3 logical stages of rsync; generator, sender and receiver. --- Makefile.in | 2 +- cleanup.c | 63 ++++ generator.c | 399 ++++++++++++++++++++ receiver.c | 450 ++++++++++++++++++++++ rsync.c | 1041 +-------------------------------------------------- sender.c | 220 +++++++++++ 6 files changed, 1147 insertions(+), 1028 deletions(-) create mode 100644 cleanup.c create mode 100644 generator.c create mode 100644 receiver.c create mode 100644 sender.c diff --git a/Makefile.in b/Makefile.in index baf78638..fb9956b8 100644 --- a/Makefile.in +++ b/Makefile.in @@ -24,7 +24,7 @@ LIBOBJ=lib/getopt.o lib/fnmatch.o lib/compat.o ZLIBOBJ=zlib/deflate.o zlib/infblock.o zlib/infcodes.o zlib/inffast.o \ zlib/inflate.o zlib/inftrees.o zlib/infutil.o zlib/trees.o \ zlib/zutil.o zlib/adler32.o -OBJS1=rsync.o exclude.o util.o md4.o main.o checksum.o match.o syscall.o log.o +OBJS1=rsync.o generator.o receiver.o cleanup.o sender.o exclude.o util.o md4.o main.o checksum.o match.o syscall.o log.o OBJS2=options.o flist.o io.o compat.o hlink.o token.o uidlist.o socket.o fileio.o DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o OBJS=$(OBJS1) $(OBJS2) $(DAEMON_OBJ) $(LIBOBJ) $(ZLIBOBJ) diff --git a/cleanup.c b/cleanup.c new file mode 100644 index 00000000..05f34527 --- /dev/null +++ b/cleanup.c @@ -0,0 +1,63 @@ +/* + Copyright (C) Andrew Tridgell 1996 + Copyright (C) Paul Mackerras 1996 + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + 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. +*/ + +#include "rsync.h" + +/* handling the cleanup when a transfer is interrupted is tricky when + --partial is selected. We need to ensure that the partial file is + kept if any real data has been transferred */ +int cleanup_got_literal=0; + +static char *cleanup_fname; +static char *cleanup_new_fname; +static struct file_struct *cleanup_file; + +void exit_cleanup(int code) +{ + extern int keep_partial; + + signal(SIGUSR1, SIG_IGN); + + if (cleanup_got_literal && cleanup_fname && keep_partial) { + char *fname = cleanup_fname; + cleanup_fname = NULL; + finish_transfer(cleanup_new_fname, fname, cleanup_file); + } + io_flush(); + if (cleanup_fname) + do_unlink(cleanup_fname); + if (code) { + kill_all(SIGUSR1); + } + exit(code); +} + +void cleanup_disable(void) +{ + cleanup_fname = NULL; + cleanup_got_literal = 0; +} + + +void cleanup_set(char *fnametmp, char *fname, struct file_struct *file) +{ + cleanup_fname = fnametmp; + cleanup_new_fname = fname; + cleanup_file = file; +} diff --git a/generator.c b/generator.c new file mode 100644 index 00000000..ffde4444 --- /dev/null +++ b/generator.c @@ -0,0 +1,399 @@ +/* + Copyright (C) Andrew Tridgell 1996 + Copyright (C) Paul Mackerras 1996 + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + 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. +*/ + +#include "rsync.h" + +extern int verbose; +extern int dry_run; +extern int relative_paths; +extern int preserve_links; +extern int am_root; +extern int preserve_devices; +extern int preserve_hard_links; +extern int update_only; +extern int whole_file; +extern int block_size; +extern int csum_length; +extern int ignore_times; +extern int io_timeout; +extern int remote_version; +extern int always_checksum; + + +/* choose whether to skip a particular file */ +static int skip_file(char *fname, + struct file_struct *file, STRUCT_STAT *st) +{ + if (st->st_size != file->length) { + return 0; + } + + /* if always checksum is set then we use the checksum instead + of the file time to determine whether to sync */ + if (always_checksum && S_ISREG(st->st_mode)) { + char sum[MD4_SUM_LENGTH]; + file_checksum(fname,sum,st->st_size); + return (memcmp(sum,file->sum,csum_length) == 0); + } + + if (ignore_times) { + return 0; + } + + return (st->st_mtime == file->modtime); +} + + +/* use a larger block size for really big files */ +static int adapt_block_size(struct file_struct *file, int bsize) +{ + int ret; + + if (bsize != BLOCK_SIZE) return bsize; + + ret = file->length / (10000); /* rough heuristic */ + ret = ret & ~15; /* multiple of 16 */ + if (ret < bsize) ret = bsize; + if (ret > CHUNK_SIZE/2) ret = CHUNK_SIZE/2; + return ret; +} + + +/* + send a sums struct down a fd + */ +static void send_sums(struct sum_struct *s,int f_out) +{ + int i; + + /* tell the other guy how many we are going to be doing and how many + bytes there are in the last chunk */ + write_int(f_out,s?s->count:0); + write_int(f_out,s?s->n:block_size); + write_int(f_out,s?s->remainder:0); + if (s) + for (i=0;icount;i++) { + write_int(f_out,s->sums[i].sum1); + write_buf(f_out,s->sums[i].sum2,csum_length); + } +} + + +/* + generate a stream of signatures/checksums that describe a buffer + + generate approximately one checksum every n bytes + */ +static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n) +{ + int i; + struct sum_struct *s; + int count; + int block_len = n; + int remainder = (len%block_len); + OFF_T offset = 0; + + count = (len+(block_len-1))/block_len; + + s = (struct sum_struct *)malloc(sizeof(*s)); + if (!s) out_of_memory("generate_sums"); + + s->count = count; + s->remainder = remainder; + s->n = n; + s->flength = len; + + if (count==0) { + s->sums = NULL; + return s; + } + + if (verbose > 3) + rprintf(FINFO,"count=%d rem=%d n=%d flength=%d\n", + s->count,s->remainder,s->n,(int)s->flength); + + s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count); + if (!s->sums) out_of_memory("generate_sums"); + + for (i=0;isums[i].sum1 = get_checksum1(map,n1); + get_checksum2(map,n1,s->sums[i].sum2); + + s->sums[i].offset = offset; + s->sums[i].len = n1; + s->sums[i].i = i; + + if (verbose > 3) + rprintf(FINFO,"chunk[%d] offset=%d len=%d sum1=%08x\n", + i,(int)s->sums[i].offset,s->sums[i].len,s->sums[i].sum1); + + len -= n1; + offset += n1; + } + + return s; +} + + +void recv_generator(char *fname,struct file_list *flist,int i,int f_out) +{ + int fd; + STRUCT_STAT st; + struct map_struct *buf; + struct sum_struct *s; + int statret; + struct file_struct *file = flist->files[i]; + + if (verbose > 2) + rprintf(FINFO,"recv_generator(%s,%d)\n",fname,i); + + statret = link_stat(fname,&st); + + if (S_ISDIR(file->mode)) { + if (dry_run) return; + if (statret == 0 && !S_ISDIR(st.st_mode)) { + if (do_unlink(fname) != 0) { + rprintf(FERROR,"unlink %s : %s\n",fname,strerror(errno)); + return; + } + statret = -1; + } + if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) { + if (!(relative_paths && errno==ENOENT && + create_directory_path(fname)==0 && + do_mkdir(fname,file->mode)==0)) { + rprintf(FERROR,"mkdir %s : %s (2)\n", + fname,strerror(errno)); + } + } + if (set_perms(fname,file,NULL,0) && verbose) + rprintf(FINFO,"%s/\n",fname); + return; + } + + if (preserve_links && S_ISLNK(file->mode)) { +#if SUPPORT_LINKS + char lnk[MAXPATHLEN]; + int l; + extern int safe_symlinks; + + if (safe_symlinks && unsafe_symlink(file->link, fname)) { + if (verbose) { + rprintf(FINFO,"ignoring unsafe symlink %s -> %s\n", + fname,file->link); + } + return; + } + if (statret == 0) { + l = readlink(fname,lnk,MAXPATHLEN-1); + if (l > 0) { + lnk[l] = 0; + if (strcmp(lnk,file->link) == 0) { + set_perms(fname,file,&st,1); + return; + } + } + } + delete_file(fname); + if (do_symlink(file->link,fname) != 0) { + rprintf(FERROR,"link %s -> %s : %s\n", + fname,file->link,strerror(errno)); + } else { + set_perms(fname,file,NULL,0); + if (verbose) { + rprintf(FINFO,"%s -> %s\n", + fname,file->link); + } + } +#endif + return; + } + +#ifdef HAVE_MKNOD + if (am_root && preserve_devices && IS_DEVICE(file->mode)) { + if (statret != 0 || + st.st_mode != file->mode || + st.st_rdev != file->rdev) { + delete_file(fname); + if (verbose > 2) + rprintf(FINFO,"mknod(%s,0%o,0x%x)\n", + fname,(int)file->mode,(int)file->rdev); + if (do_mknod(fname,file->mode,file->rdev) != 0) { + rprintf(FERROR,"mknod %s : %s\n",fname,strerror(errno)); + } else { + set_perms(fname,file,NULL,0); + if (verbose) + rprintf(FINFO,"%s\n",fname); + } + } else { + set_perms(fname,file,&st,1); + } + return; + } +#endif + + if (preserve_hard_links && check_hard_link(file)) { + if (verbose > 1) + rprintf(FINFO,"%s is a hard link\n",f_name(file)); + return; + } + + if (!S_ISREG(file->mode)) { + rprintf(FINFO,"skipping non-regular file %s\n",fname); + return; + } + + if (statret == -1) { + if (errno == ENOENT) { + write_int(f_out,i); + if (!dry_run) send_sums(NULL,f_out); + } else { + if (verbose > 1) + rprintf(FERROR,"recv_generator failed to open %s\n",fname); + } + return; + } + + if (!S_ISREG(st.st_mode)) { + if (delete_file(fname) != 0) { + return; + } + + /* now pretend the file didn't exist */ + write_int(f_out,i); + if (!dry_run) send_sums(NULL,f_out); + return; + } + + if (update_only && st.st_mtime > file->modtime) { + if (verbose > 1) + rprintf(FINFO,"%s is newer\n",fname); + return; + } + + if (skip_file(fname, file, &st)) { + set_perms(fname,file,&st,1); + return; + } + + if (dry_run) { + write_int(f_out,i); + return; + } + + if (whole_file) { + write_int(f_out,i); + send_sums(NULL,f_out); + return; + } + + /* open the file */ + fd = open(fname,O_RDONLY); + + if (fd == -1) { + rprintf(FERROR,"failed to open %s : %s\n",fname,strerror(errno)); + rprintf(FERROR,"skipping %s\n",fname); + return; + } + + if (st.st_size > 0) { + buf = map_file(fd,st.st_size); + } else { + buf = NULL; + } + + if (verbose > 3) + rprintf(FINFO,"gen mapped %s of size %d\n",fname,(int)st.st_size); + + s = generate_sums(buf,st.st_size,adapt_block_size(file, block_size)); + + if (verbose > 2) + rprintf(FINFO,"sending sums for %d\n",i); + + write_int(f_out,i); + send_sums(s,f_out); + + close(fd); + if (buf) unmap_file(buf); + + free_sums(s); +} + + + +void generate_files(int f,struct file_list *flist,char *local_name,int f_recv) +{ + int i; + int phase=0; + + if (verbose > 2) + rprintf(FINFO,"generator starting pid=%d count=%d\n", + (int)getpid(),flist->count); + + for (i = 0; i < flist->count; i++) { + struct file_struct *file = flist->files[i]; + mode_t saved_mode = file->mode; + if (!file->basename) continue; + + /* we need to ensure that any directories we create have writeable + permissions initially so that we can create the files within + them. This is then fixed after the files are transferred */ + if (!am_root && S_ISDIR(file->mode)) { + file->mode |= S_IWUSR; /* user write */ + } + + recv_generator(local_name?local_name:f_name(file), + flist,i,f); + + file->mode = saved_mode; + } + + phase++; + csum_length = SUM_LENGTH; + ignore_times=1; + + if (verbose > 2) + rprintf(FINFO,"generate_files phase=%d\n",phase); + + write_int(f,-1); + + /* we expect to just sit around now, so don't exit on a + timeout. If we really get a timeout then the other process should + exit */ + io_timeout = 0; + + if (remote_version >= 13) { + /* in newer versions of the protocol the files can cycle through + the system more than once to catch initial checksum errors */ + for (i=read_int(f_recv); i != -1; i=read_int(f_recv)) { + struct file_struct *file = flist->files[i]; + recv_generator(local_name?local_name:f_name(file), + flist,i,f); + } + + phase++; + if (verbose > 2) + rprintf(FINFO,"generate_files phase=%d\n",phase); + + write_int(f,-1); + } +} diff --git a/receiver.c b/receiver.c new file mode 100644 index 00000000..03912ade --- /dev/null +++ b/receiver.c @@ -0,0 +1,450 @@ +/* + Copyright (C) Andrew Tridgell 1996 + Copyright (C) Paul Mackerras 1996 + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + 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. +*/ + +#include "rsync.h" + +extern int verbose; +extern int recurse; +extern int delete_mode; +extern int remote_version; +extern int csum_length; +extern struct stats stats; +extern int dry_run; +extern int am_server; +extern int relative_paths; +extern int preserve_hard_links; +extern int cvs_exclude; +extern int io_error; +extern char *tmpdir; + + +static struct delete_list { + dev_t dev; + INO_T inode; +} *delete_list; +static int dlist_len, dlist_alloc_len; + + +/* yuck! This function wouldn't have been necessary if I had the sorting + algorithm right. Unfortunately fixing the sorting algorithm would introduce + a backward incompatibility as file list indexes are sent over the link. +*/ +static int delete_already_done(struct file_list *flist,int j) +{ + int i; + STRUCT_STAT st; + + if (link_stat(f_name(flist->files[j]), &st)) return 1; + + for (i=0;idev; + delete_list[dlist_len].inode = file->inode; + dlist_len++; + + if (verbose > 3) + rprintf(FINFO,"added %s to delete list\n", f_name(file)); +} + +static void delete_one(struct file_struct *f) +{ + if (!S_ISDIR(f->mode)) { + if (do_unlink(f_name(f)) != 0) { + rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno)); + } else if (verbose) { + rprintf(FINFO,"deleting %s\n",f_name(f)); + } + } else { + if (do_rmdir(f_name(f)) != 0) { + if (errno != ENOTEMPTY && errno != EEXIST) + rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno)); + } else if (verbose) { + rprintf(FINFO,"deleting directory %s\n",f_name(f)); + } + } +} + + + + +/* this deletes any files on the receiving side that are not present + on the sending side. For version 1.6.4 I have changed the behaviour + to match more closely what most people seem to expect of this option */ +static void delete_files(struct file_list *flist) +{ + struct file_list *local_file_list; + int i, j; + char *name; + + if (cvs_exclude) + add_cvs_excludes(); + + if (io_error) { + rprintf(FINFO,"IO error encountered - skipping file deletion\n"); + return; + } + + for (j=0;jcount;j++) { + if (!S_ISDIR(flist->files[j]->mode) || + !(flist->files[j]->flags & FLAG_DELETE)) continue; + + if (remote_version < 19 && + delete_already_done(flist, j)) continue; + + name = strdup(f_name(flist->files[j])); + + if (!(local_file_list = send_file_list(-1,1,&name))) { + free(name); + continue; + } + + if (verbose > 1) + rprintf(FINFO,"deleting in %s\n", name); + + for (i=local_file_list->count-1;i>=0;i--) { + if (!local_file_list->files[i]->basename) continue; + if (remote_version < 19 && + S_ISDIR(local_file_list->files[i]->mode)) + add_delete_entry(local_file_list->files[i]); + if (-1 == flist_find(flist,local_file_list->files[i])) { + delete_one(local_file_list->files[i]); + } + } + flist_free(local_file_list); + free(name); + } +} + + +static int get_tmpname(char *fnametmp, char *fname) +{ + char *f; + + /* open tmp file */ + if (tmpdir) { + f = strrchr(fname,'/'); + if (f == NULL) + f = fname; + else + f++; + if (strlen(tmpdir)+strlen(f)+10 > MAXPATHLEN) { + rprintf(FERROR,"filename too long\n"); + return 0; + } + slprintf(fnametmp,MAXPATHLEN-1, "%s/.%s.XXXXXX",tmpdir,f); + return 1; + } + + f = strrchr(fname,'/'); + + if (strlen(fname)+9 > MAXPATHLEN) { + rprintf(FERROR,"filename too long\n"); + return 0; + } + + if (f) { + *f = 0; + slprintf(fnametmp,MAXPATHLEN-1,"%s/.%s.XXXXXX", + fname,f+1); + *f = '/'; + } else { + slprintf(fnametmp,MAXPATHLEN-1,".%s.XXXXXX",fname); + } + + return 1; +} + + +static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, + OFF_T total_size) +{ + int i,n,remainder,len,count; + OFF_T offset = 0; + OFF_T offset2; + char *data; + static char file_sum1[MD4_SUM_LENGTH]; + static char file_sum2[MD4_SUM_LENGTH]; + char *map=NULL; + + count = read_int(f_in); + n = read_int(f_in); + remainder = read_int(f_in); + + sum_init(); + + for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) { + + show_progress(offset, total_size); + + if (i > 0) { + extern int cleanup_got_literal; + + if (verbose > 3) { + rprintf(FINFO,"data recv %d at %d\n", + i,(int)offset); + } + + stats.literal_data += i; + cleanup_got_literal = 1; + + sum_update(data,i); + + if (fd != -1 && write_file(fd,data,i) != i) { + rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno)); + exit_cleanup(1); + } + offset += i; + continue; + } + + i = -(i+1); + offset2 = i*n; + len = n; + if (i == count-1 && remainder != 0) + len = remainder; + + stats.matched_data += len; + + if (verbose > 3) + rprintf(FINFO,"chunk[%d] of size %d at %d offset=%d\n", + i,len,(int)offset2,(int)offset); + + map = map_ptr(buf,offset2,len); + + see_token(map, len); + sum_update(map,len); + + if (fd != -1 && write_file(fd,map,len) != len) { + rprintf(FERROR,"write failed on %s : %s\n", + fname,strerror(errno)); + exit_cleanup(1); + } + offset += len; + } + + end_progress(); + + if (fd != -1 && offset > 0 && sparse_end(fd) != 0) { + rprintf(FERROR,"write failed on %s : %s\n", + fname,strerror(errno)); + exit_cleanup(1); + } + + sum_end(file_sum1); + + if (remote_version >= 14) { + read_buf(f_in,file_sum2,MD4_SUM_LENGTH); + if (verbose > 2) { + rprintf(FINFO,"got file_sum\n"); + } + if (fd != -1 && + memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) { + return 0; + } + } + return 1; +} + + + +int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) +{ + int fd1,fd2; + STRUCT_STAT st; + char *fname; + char fnametmp[MAXPATHLEN]; + struct map_struct *buf; + int i; + struct file_struct *file; + int phase=0; + int recv_ok; + + if (verbose > 2) { + rprintf(FINFO,"recv_files(%d) starting\n",flist->count); + } + + if (recurse && delete_mode && !local_name && flist->count>0) { + delete_files(flist); + } + + while (1) { + cleanup_disable(); + + i = read_int(f_in); + if (i == -1) { + if (phase==0 && remote_version >= 13) { + phase++; + csum_length = SUM_LENGTH; + if (verbose > 2) + rprintf(FINFO,"recv_files phase=%d\n",phase); + write_int(f_gen,-1); + continue; + } + break; + } + + if (i < 0 || i >= flist->count) { + rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n", + i, flist->count); + exit_cleanup(1); + } + + file = flist->files[i]; + fname = f_name(file); + + stats.num_transferred_files++; + stats.total_transferred_size += file->length; + + if (local_name) + fname = local_name; + + if (dry_run) { + if (!am_server && verbose) + rprintf(FINFO,"%s\n",fname); + continue; + } + + if (verbose > 2) + rprintf(FINFO,"recv_files(%s)\n",fname); + + /* open the file */ + fd1 = open(fname,O_RDONLY); + + if (fd1 != -1 && do_fstat(fd1,&st) != 0) { + rprintf(FERROR,"fstat %s : %s\n",fname,strerror(errno)); + receive_data(f_in,NULL,-1,NULL,file->length); + close(fd1); + continue; + } + + if (fd1 != -1 && !S_ISREG(st.st_mode)) { + rprintf(FERROR,"%s : not a regular file (recv_files)\n",fname); + receive_data(f_in,NULL,-1,NULL,file->length); + close(fd1); + continue; + } + + if (fd1 != -1 && st.st_size > 0) { + buf = map_file(fd1,st.st_size); + if (verbose > 2) + rprintf(FINFO,"recv mapped %s of size %d\n",fname,(int)st.st_size); + } else { + buf = NULL; + } + + if (!get_tmpname(fnametmp,fname)) { + if (buf) unmap_file(buf); + if (fd1 != -1) close(fd1); + continue; + } + + if (NULL == do_mktemp(fnametmp)) { + rprintf(FERROR,"mktemp %s failed\n",fnametmp); + receive_data(f_in,buf,-1,NULL,file->length); + if (buf) unmap_file(buf); + if (fd1 != -1) close(fd1); + continue; + } + + /* we initially set the perms without the + setuid/setgid bits to ensure that there is no race + condition. They are then correctly updated after + the lchown. Thanks to snabb@epipe.fi for pointing + this out */ + fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, + file->mode & ACCESSPERMS); + + if (fd2 == -1 && relative_paths && errno == ENOENT && + create_directory_path(fnametmp) == 0) { + fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, + file->mode & ACCESSPERMS); + } + if (fd2 == -1) { + rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno)); + receive_data(f_in,buf,-1,NULL,file->length); + if (buf) unmap_file(buf); + if (fd1 != -1) close(fd1); + continue; + } + + cleanup_set(fnametmp, fname, file); + + if (!am_server && verbose) + rprintf(FINFO,"%s\n",fname); + + /* recv file data */ + recv_ok = receive_data(f_in,buf,fd2,fname,file->length); + + if (buf) unmap_file(buf); + if (fd1 != -1) { + close(fd1); + } + close(fd2); + + if (verbose > 2) + rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname); + + finish_transfer(fname, fnametmp, file); + + cleanup_disable(); + + if (!recv_ok) { + if (csum_length == SUM_LENGTH) { + rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n", + fname); + } else { + if (verbose > 1) + rprintf(FINFO,"redoing %s(%d)\n",fname,i); + write_int(f_gen,i); + } + } + } + + if (preserve_hard_links) + do_hard_links(flist); + + /* now we need to fix any directory permissions that were + modified during the transfer */ + for (i = 0; i < flist->count; i++) { + file = flist->files[i]; + if (!file->basename || !S_ISDIR(file->mode)) continue; + recv_generator(f_name(file),flist,i,-1); + } + + if (verbose > 2) + rprintf(FINFO,"recv_files finished\n"); + + return 0; +} + diff --git a/rsync.c b/rsync.c index f5a1f48c..13c5f21b 100644 --- a/rsync.c +++ b/rsync.c @@ -17,77 +17,26 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include "rsync.h" +/* this file contains code used by more than one part of the rsync + process */ -extern int csum_length; +#include "rsync.h" extern int verbose; -extern int am_server; -extern int always_checksum; -extern time_t starttime; - -extern int remote_version; - -extern char *backup_suffix; -extern char *tmpdir; - -extern int whole_file; -extern int block_size; -extern int update_only; -extern int make_backups; -extern int preserve_links; -extern int preserve_hard_links; -extern int preserve_perms; -extern int preserve_devices; -extern int preserve_uid; -extern int preserve_gid; -extern int preserve_times; extern int dry_run; -extern int ignore_times; -extern int recurse; -extern int delete_mode; -extern int cvs_exclude; +extern int preserve_times; extern int am_root; -extern int relative_paths; -extern int io_timeout; -extern int io_error; -extern struct stats stats; - - -/* handling the cleanup when a transfer is interrupted is tricky when - --partial is selected. We need to ensure that the partial file is - kept if any real data has been transferred */ -static int cleanup_got_literal; -static char *cleanup_fname; -static char *cleanup_new_fname; -static struct file_struct *cleanup_file; -static void finish_transfer(char *fname, char *fnametmp, struct file_struct *file); - -void exit_cleanup(int code) -{ - extern int keep_partial; - - signal(SIGUSR1, SIG_IGN); - - if (cleanup_got_literal && cleanup_fname && keep_partial) { - char *fname = cleanup_fname; - cleanup_fname = NULL; - finish_transfer(cleanup_new_fname, fname, cleanup_file); - } - io_flush(); - if (cleanup_fname) - do_unlink(cleanup_fname); - if (code) { - kill_all(SIGUSR1); - } - exit(code); -} +extern int preserve_uid; +extern int preserve_gid; +extern int preserve_perms; +extern int make_backups; +extern char *backup_suffix; /* free a sums struct */ -static void free_sums(struct sum_struct *s) +void free_sums(struct sum_struct *s) { if (s->sums) free(s->sums); free(s); @@ -98,7 +47,7 @@ static void free_sums(struct sum_struct *s) * delete a file or directory. If force_delet is set then delete * recursively */ -static int delete_file(char *fname) +int delete_file(char *fname) { DIR *d; struct dirent *di; @@ -164,139 +113,9 @@ static int delete_file(char *fname) return 0; } -/* - send a sums struct down a fd - */ -static void send_sums(struct sum_struct *s,int f_out) -{ - int i; - - /* tell the other guy how many we are going to be doing and how many - bytes there are in the last chunk */ - write_int(f_out,s?s->count:0); - write_int(f_out,s?s->n:block_size); - write_int(f_out,s?s->remainder:0); - if (s) - for (i=0;icount;i++) { - write_int(f_out,s->sums[i].sum1); - write_buf(f_out,s->sums[i].sum2,csum_length); - } -} - - -/* - generate a stream of signatures/checksums that describe a buffer - - generate approximately one checksum every n bytes - */ -static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n) -{ - int i; - struct sum_struct *s; - int count; - int block_len = n; - int remainder = (len%block_len); - OFF_T offset = 0; - - count = (len+(block_len-1))/block_len; - - s = (struct sum_struct *)malloc(sizeof(*s)); - if (!s) out_of_memory("generate_sums"); - - s->count = count; - s->remainder = remainder; - s->n = n; - s->flength = len; - - if (count==0) { - s->sums = NULL; - return s; - } - - if (verbose > 3) - rprintf(FINFO,"count=%d rem=%d n=%d flength=%d\n", - s->count,s->remainder,s->n,(int)s->flength); - - s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count); - if (!s->sums) out_of_memory("generate_sums"); - - for (i=0;isums[i].sum1 = get_checksum1(map,n1); - get_checksum2(map,n1,s->sums[i].sum2); - - s->sums[i].offset = offset; - s->sums[i].len = n1; - s->sums[i].i = i; - - if (verbose > 3) - rprintf(FINFO,"chunk[%d] offset=%d len=%d sum1=%08x\n", - i,(int)s->sums[i].offset,s->sums[i].len,s->sums[i].sum1); - - len -= n1; - offset += n1; - } - - return s; -} - - -/* - receive the checksums for a buffer - */ -static struct sum_struct *receive_sums(int f) -{ - struct sum_struct *s; - int i; - OFF_T offset = 0; - - s = (struct sum_struct *)malloc(sizeof(*s)); - if (!s) out_of_memory("receive_sums"); - - s->count = read_int(f); - s->n = read_int(f); - s->remainder = read_int(f); - s->sums = NULL; - - if (verbose > 3) - rprintf(FINFO,"count=%d n=%d rem=%d\n", - s->count,s->n,s->remainder); - - if (s->count == 0) - return(s); - - s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count); - if (!s->sums) out_of_memory("receive_sums"); - - for (i=0;icount;i++) { - s->sums[i].sum1 = read_int(f); - read_buf(f,s->sums[i].sum2,csum_length); - - s->sums[i].offset = offset; - s->sums[i].i = i; - - if (i == s->count-1 && s->remainder != 0) { - s->sums[i].len = s->remainder; - } else { - s->sums[i].len = s->n; - } - offset += s->sums[i].len; - - if (verbose > 3) - rprintf(FINFO,"chunk[%d] len=%d offset=%d sum1=%08x\n", - i,s->sums[i].len,(int)s->sums[i].offset,s->sums[i].sum1); - } - - s->flength = offset; - - return s; -} - -static int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, - int report) +int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, + int report) { int updated = 0; STRUCT_STAT st2; @@ -363,479 +182,15 @@ static int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, } -/* choose whether to skip a particular file */ -static int skip_file(char *fname, - struct file_struct *file, STRUCT_STAT *st) -{ - if (st->st_size != file->length) { - return 0; - } - - /* if always checksum is set then we use the checksum instead - of the file time to determine whether to sync */ - if (always_checksum && S_ISREG(st->st_mode)) { - char sum[MD4_SUM_LENGTH]; - file_checksum(fname,sum,st->st_size); - return (memcmp(sum,file->sum,csum_length) == 0); - } - - if (ignore_times) { - return 0; - } - - return (st->st_mtime == file->modtime); -} - - -/* use a larger block size for really big files */ -static int adapt_block_size(struct file_struct *file, int bsize) -{ - int ret; - - if (bsize != BLOCK_SIZE) return bsize; - - ret = file->length / (10000); /* rough heuristic */ - ret = ret & ~15; /* multiple of 16 */ - if (ret < bsize) ret = bsize; - if (ret > CHUNK_SIZE/2) ret = CHUNK_SIZE/2; - return ret; -} - -static void recv_generator(char *fname,struct file_list *flist,int i,int f_out) -{ - int fd; - STRUCT_STAT st; - struct map_struct *buf; - struct sum_struct *s; - int statret; - struct file_struct *file = flist->files[i]; - - if (verbose > 2) - rprintf(FINFO,"recv_generator(%s,%d)\n",fname,i); - - statret = link_stat(fname,&st); - - if (S_ISDIR(file->mode)) { - if (dry_run) return; - if (statret == 0 && !S_ISDIR(st.st_mode)) { - if (do_unlink(fname) != 0) { - rprintf(FERROR,"unlink %s : %s\n",fname,strerror(errno)); - return; - } - statret = -1; - } - if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) { - if (!(relative_paths && errno==ENOENT && - create_directory_path(fname)==0 && - do_mkdir(fname,file->mode)==0)) { - rprintf(FERROR,"mkdir %s : %s (2)\n", - fname,strerror(errno)); - } - } - if (set_perms(fname,file,NULL,0) && verbose) - rprintf(FINFO,"%s/\n",fname); - return; - } - - if (preserve_links && S_ISLNK(file->mode)) { -#if SUPPORT_LINKS - char lnk[MAXPATHLEN]; - int l; - extern int safe_symlinks; - - if (safe_symlinks && unsafe_symlink(file->link, fname)) { - if (verbose) { - rprintf(FINFO,"ignoring unsafe symlink %s -> %s\n", - fname,file->link); - } - return; - } - if (statret == 0) { - l = readlink(fname,lnk,MAXPATHLEN-1); - if (l > 0) { - lnk[l] = 0; - if (strcmp(lnk,file->link) == 0) { - set_perms(fname,file,&st,1); - return; - } - } - } - delete_file(fname); - if (do_symlink(file->link,fname) != 0) { - rprintf(FERROR,"link %s -> %s : %s\n", - fname,file->link,strerror(errno)); - } else { - set_perms(fname,file,NULL,0); - if (verbose) { - rprintf(FINFO,"%s -> %s\n", - fname,file->link); - } - } -#endif - return; - } - -#ifdef HAVE_MKNOD - if (am_root && preserve_devices && IS_DEVICE(file->mode)) { - if (statret != 0 || - st.st_mode != file->mode || - st.st_rdev != file->rdev) { - delete_file(fname); - if (verbose > 2) - rprintf(FINFO,"mknod(%s,0%o,0x%x)\n", - fname,(int)file->mode,(int)file->rdev); - if (do_mknod(fname,file->mode,file->rdev) != 0) { - rprintf(FERROR,"mknod %s : %s\n",fname,strerror(errno)); - } else { - set_perms(fname,file,NULL,0); - if (verbose) - rprintf(FINFO,"%s\n",fname); - } - } else { - set_perms(fname,file,&st,1); - } - return; - } -#endif - - if (preserve_hard_links && check_hard_link(file)) { - if (verbose > 1) - rprintf(FINFO,"%s is a hard link\n",f_name(file)); - return; - } - - if (!S_ISREG(file->mode)) { - rprintf(FINFO,"skipping non-regular file %s\n",fname); - return; - } - - if (statret == -1) { - if (errno == ENOENT) { - write_int(f_out,i); - if (!dry_run) send_sums(NULL,f_out); - } else { - if (verbose > 1) - rprintf(FERROR,"recv_generator failed to open %s\n",fname); - } - return; - } - - if (!S_ISREG(st.st_mode)) { - if (delete_file(fname) != 0) { - return; - } - - /* now pretend the file didn't exist */ - write_int(f_out,i); - if (!dry_run) send_sums(NULL,f_out); - return; - } - - if (update_only && st.st_mtime > file->modtime) { - if (verbose > 1) - rprintf(FINFO,"%s is newer\n",fname); - return; - } - - if (skip_file(fname, file, &st)) { - set_perms(fname,file,&st,1); - return; - } - - if (dry_run) { - write_int(f_out,i); - return; - } - - if (whole_file) { - write_int(f_out,i); - send_sums(NULL,f_out); - return; - } - - /* open the file */ - fd = open(fname,O_RDONLY); - - if (fd == -1) { - rprintf(FERROR,"failed to open %s : %s\n",fname,strerror(errno)); - rprintf(FERROR,"skipping %s\n",fname); - return; - } - - if (st.st_size > 0) { - buf = map_file(fd,st.st_size); - } else { - buf = NULL; - } - - if (verbose > 3) - rprintf(FINFO,"gen mapped %s of size %d\n",fname,(int)st.st_size); - - s = generate_sums(buf,st.st_size,adapt_block_size(file, block_size)); - - if (verbose > 2) - rprintf(FINFO,"sending sums for %d\n",i); - - write_int(f_out,i); - send_sums(s,f_out); - - close(fd); - if (buf) unmap_file(buf); - - free_sums(s); -} - - - -static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, - OFF_T total_size) -{ - int i,n,remainder,len,count; - OFF_T offset = 0; - OFF_T offset2; - char *data; - static char file_sum1[MD4_SUM_LENGTH]; - static char file_sum2[MD4_SUM_LENGTH]; - char *map=NULL; - - count = read_int(f_in); - n = read_int(f_in); - remainder = read_int(f_in); - - sum_init(); - - for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) { - - show_progress(offset, total_size); - - if (i > 0) { - if (verbose > 3) { - rprintf(FINFO,"data recv %d at %d\n", - i,(int)offset); - } - - stats.literal_data += i; - cleanup_got_literal = 1; - - sum_update(data,i); - - if (fd != -1 && write_file(fd,data,i) != i) { - rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno)); - exit_cleanup(1); - } - offset += i; - continue; - } - - i = -(i+1); - offset2 = i*n; - len = n; - if (i == count-1 && remainder != 0) - len = remainder; - - stats.matched_data += len; - - if (verbose > 3) - rprintf(FINFO,"chunk[%d] of size %d at %d offset=%d\n", - i,len,(int)offset2,(int)offset); - - map = map_ptr(buf,offset2,len); - - see_token(map, len); - sum_update(map,len); - - if (fd != -1 && write_file(fd,map,len) != len) { - rprintf(FERROR,"write failed on %s : %s\n", - fname,strerror(errno)); - exit_cleanup(1); - } - offset += len; - } - - end_progress(); - - if (fd != -1 && offset > 0 && sparse_end(fd) != 0) { - rprintf(FERROR,"write failed on %s : %s\n", - fname,strerror(errno)); - exit_cleanup(1); - } - - sum_end(file_sum1); - - if (remote_version >= 14) { - read_buf(f_in,file_sum2,MD4_SUM_LENGTH); - if (verbose > 2) { - rprintf(FINFO,"got file_sum\n"); - } - if (fd != -1 && - memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) { - return 0; - } - } - return 1; -} - - -static void delete_one(struct file_struct *f) -{ - if (!S_ISDIR(f->mode)) { - if (do_unlink(f_name(f)) != 0) { - rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno)); - } else if (verbose) { - rprintf(FINFO,"deleting %s\n",f_name(f)); - } - } else { - if (do_rmdir(f_name(f)) != 0) { - if (errno != ENOTEMPTY && errno != EEXIST) - rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno)); - } else if (verbose) { - rprintf(FINFO,"deleting directory %s\n",f_name(f)); - } - } -} - - - -static struct delete_list { - dev_t dev; - INO_T inode; -} *delete_list; -static int dlist_len, dlist_alloc_len; - -static void add_delete_entry(struct file_struct *file) -{ - if (dlist_len == dlist_alloc_len) { - dlist_alloc_len += 1024; - delete_list = (struct delete_list *)Realloc(delete_list, sizeof(delete_list[0])*dlist_alloc_len); - if (!delete_list) out_of_memory("add_delete_entry"); - } - - delete_list[dlist_len].dev = file->dev; - delete_list[dlist_len].inode = file->inode; - dlist_len++; - - if (verbose > 3) - rprintf(FINFO,"added %s to delete list\n", f_name(file)); -} - -/* yuck! This function wouldn't have been necessary if I had the sorting - algorithm right. Unfortunately fixing the sorting algorithm would introduce - a backward incompatibility as file list indexes are sent over the link. -*/ -static int delete_already_done(struct file_list *flist,int j) -{ - int i; - STRUCT_STAT st; - - if (link_stat(f_name(flist->files[j]), &st)) return 1; - - for (i=0;icount;j++) { - if (!S_ISDIR(flist->files[j]->mode) || - !(flist->files[j]->flags & FLAG_DELETE)) continue; - - if (remote_version < 19 && - delete_already_done(flist, j)) continue; - - name = strdup(f_name(flist->files[j])); - - if (!(local_file_list = send_file_list(-1,1,&name))) { - free(name); - continue; - } - - if (verbose > 1) - rprintf(FINFO,"deleting in %s\n", name); - - for (i=local_file_list->count-1;i>=0;i--) { - if (!local_file_list->files[i]->basename) continue; - if (remote_version < 19 && - S_ISDIR(local_file_list->files[i]->mode)) - add_delete_entry(local_file_list->files[i]); - if (-1 == flist_find(flist,local_file_list->files[i])) { - delete_one(local_file_list->files[i]); - } - } - flist_free(local_file_list); - free(name); - } -} - void sig_int(void) { exit_cleanup(1); } - - -static int get_tmpname(char *fnametmp, char *fname) -{ - char *f; - - /* open tmp file */ - if (tmpdir) { - f = strrchr(fname,'/'); - if (f == NULL) - f = fname; - else - f++; - if (strlen(tmpdir)+strlen(f)+10 > MAXPATHLEN) { - rprintf(FERROR,"filename too long\n"); - return 0; - } - slprintf(fnametmp,MAXPATHLEN-1, "%s/.%s.XXXXXX",tmpdir,f); - return 1; - } - - f = strrchr(fname,'/'); - - if (strlen(fname)+9 > MAXPATHLEN) { - rprintf(FERROR,"filename too long\n"); - return 0; - } - - if (f) { - *f = 0; - slprintf(fnametmp,MAXPATHLEN-1,"%s/.%s.XXXXXX", - fname,f+1); - *f = '/'; - } else { - slprintf(fnametmp,MAXPATHLEN-1,".%s.XXXXXX",fname); - } - - return 1; -} - /* finish off a file transfer, renaming the file and setting the permissions and ownership */ -static void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) +void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) { if (make_backups) { char fnamebak[MAXPATHLEN]; @@ -873,372 +228,4 @@ static void finish_transfer(char *fname, char *fnametmp, struct file_struct *fil } -int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) -{ - int fd1,fd2; - STRUCT_STAT st; - char *fname; - char fnametmp[MAXPATHLEN]; - struct map_struct *buf; - int i; - struct file_struct *file; - int phase=0; - int recv_ok; - - if (verbose > 2) { - rprintf(FINFO,"recv_files(%d) starting\n",flist->count); - } - - if (recurse && delete_mode && !local_name && flist->count>0) { - delete_files(flist); - } - - while (1) { - cleanup_fname = NULL; - cleanup_got_literal = 0; - - i = read_int(f_in); - if (i == -1) { - if (phase==0 && remote_version >= 13) { - phase++; - csum_length = SUM_LENGTH; - if (verbose > 2) - rprintf(FINFO,"recv_files phase=%d\n",phase); - write_int(f_gen,-1); - continue; - } - break; - } - - if (i < 0 || i >= flist->count) { - rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n", - i, flist->count); - exit_cleanup(1); - } - - file = flist->files[i]; - fname = f_name(file); - - stats.num_transferred_files++; - stats.total_transferred_size += file->length; - - if (local_name) - fname = local_name; - - if (dry_run) { - if (!am_server && verbose) - rprintf(FINFO,"%s\n",fname); - continue; - } - - if (verbose > 2) - rprintf(FINFO,"recv_files(%s)\n",fname); - - /* open the file */ - fd1 = open(fname,O_RDONLY); - - if (fd1 != -1 && do_fstat(fd1,&st) != 0) { - rprintf(FERROR,"fstat %s : %s\n",fname,strerror(errno)); - receive_data(f_in,NULL,-1,NULL,file->length); - close(fd1); - continue; - } - - if (fd1 != -1 && !S_ISREG(st.st_mode)) { - rprintf(FERROR,"%s : not a regular file (recv_files)\n",fname); - receive_data(f_in,NULL,-1,NULL,file->length); - close(fd1); - continue; - } - - if (fd1 != -1 && st.st_size > 0) { - buf = map_file(fd1,st.st_size); - if (verbose > 2) - rprintf(FINFO,"recv mapped %s of size %d\n",fname,(int)st.st_size); - } else { - buf = NULL; - } - - if (!get_tmpname(fnametmp,fname)) { - if (buf) unmap_file(buf); - if (fd1 != -1) close(fd1); - continue; - } - - if (NULL == do_mktemp(fnametmp)) { - rprintf(FERROR,"mktemp %s failed\n",fnametmp); - receive_data(f_in,buf,-1,NULL,file->length); - if (buf) unmap_file(buf); - if (fd1 != -1) close(fd1); - continue; - } - - /* we initially set the perms without the - setuid/setgid bits to ensure that there is no race - condition. They are then correctly updated after - the lchown. Thanks to snabb@epipe.fi for pointing - this out */ - fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, - file->mode & ACCESSPERMS); - - if (fd2 == -1 && relative_paths && errno == ENOENT && - create_directory_path(fnametmp) == 0) { - fd2 = do_open(fnametmp,O_WRONLY|O_CREAT|O_EXCL, - file->mode & ACCESSPERMS); - } - if (fd2 == -1) { - rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno)); - receive_data(f_in,buf,-1,NULL,file->length); - if (buf) unmap_file(buf); - if (fd1 != -1) close(fd1); - continue; - } - - cleanup_fname = fnametmp; - cleanup_new_fname = fname; - cleanup_file = file; - - if (!am_server && verbose) - rprintf(FINFO,"%s\n",fname); - - /* recv file data */ - recv_ok = receive_data(f_in,buf,fd2,fname,file->length); - - if (buf) unmap_file(buf); - if (fd1 != -1) { - close(fd1); - } - close(fd2); - - if (verbose > 2) - rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname); - - finish_transfer(fname, fnametmp, file); - - cleanup_fname = NULL; - - if (!recv_ok) { - if (csum_length == SUM_LENGTH) { - rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n", - fname); - } else { - if (verbose > 1) - rprintf(FINFO,"redoing %s(%d)\n",fname,i); - write_int(f_gen,i); - } - } - } - - if (preserve_hard_links) - do_hard_links(flist); - - /* now we need to fix any directory permissions that were - modified during the transfer */ - for (i = 0; i < flist->count; i++) { - file = flist->files[i]; - if (!file->basename || !S_ISDIR(file->mode)) continue; - recv_generator(f_name(file),flist,i,-1); - } - - if (verbose > 2) - rprintf(FINFO,"recv_files finished\n"); - - return 0; -} - - - -void send_files(struct file_list *flist,int f_out,int f_in) -{ - int fd; - struct sum_struct *s; - struct map_struct *buf; - STRUCT_STAT st; - char fname[MAXPATHLEN]; - int i; - struct file_struct *file; - int phase = 0; - - if (verbose > 2) - rprintf(FINFO,"send_files starting\n"); - - setup_readbuffer(f_in); - - while (1) { - int offset=0; - - i = read_int(f_in); - if (i == -1) { - if (phase==0 && remote_version >= 13) { - phase++; - csum_length = SUM_LENGTH; - write_int(f_out,-1); - if (verbose > 2) - rprintf(FINFO,"send_files phase=%d\n",phase); - continue; - } - break; - } - - if (i < 0 || i >= flist->count) { - rprintf(FERROR,"Invalid file index %d (count=%d)\n", - i, flist->count); - exit_cleanup(1); - } - - file = flist->files[i]; - - stats.num_transferred_files++; - stats.total_transferred_size += file->length; - - fname[0] = 0; - if (file->basedir) { - strlcpy(fname,file->basedir,MAXPATHLEN-1); - if (strlen(fname) == MAXPATHLEN-1) { - io_error = 1; - rprintf(FERROR, "send_files failed on long-named directory %s\n", - fname); - return; - } - strlcat(fname,"/",MAXPATHLEN-1); - offset = strlen(file->basedir)+1; - } - strlcat(fname,f_name(file),MAXPATHLEN-strlen(fname)); - - if (verbose > 2) - rprintf(FINFO,"send_files(%d,%s)\n",i,fname); - - if (dry_run) { - if (!am_server && verbose) - rprintf(FINFO,"%s\n",fname); - write_int(f_out,i); - continue; - } - - s = receive_sums(f_in); - if (!s) { - io_error = 1; - rprintf(FERROR,"receive_sums failed\n"); - return; - } - - fd = open(fname,O_RDONLY); - if (fd == -1) { - io_error = 1; - rprintf(FERROR,"send_files failed to open %s: %s\n", - fname,strerror(errno)); - free_sums(s); - continue; - } - - /* map the local file */ - if (do_fstat(fd,&st) != 0) { - io_error = 1; - rprintf(FERROR,"fstat failed : %s\n",strerror(errno)); - free_sums(s); - close(fd); - return; - } - - if (st.st_size > 0) { - buf = map_file(fd,st.st_size); - } else { - buf = NULL; - } - - if (verbose > 2) - rprintf(FINFO,"send_files mapped %s of size %d\n", - fname,(int)st.st_size); - - write_int(f_out,i); - - write_int(f_out,s->count); - write_int(f_out,s->n); - write_int(f_out,s->remainder); - - if (verbose > 2) - rprintf(FINFO,"calling match_sums %s\n",fname); - - if (!am_server && verbose) - rprintf(FINFO,"%s\n",fname+offset); - - match_sums(f_out,s,buf,st.st_size); - - if (buf) unmap_file(buf); - close(fd); - - free_sums(s); - - if (verbose > 2) - rprintf(FINFO,"sender finished %s\n",fname); - } - - if (verbose > 2) - rprintf(FINFO,"send files finished\n"); - - match_report(); - - write_int(f_out,-1); -} - - - -void generate_files(int f,struct file_list *flist,char *local_name,int f_recv) -{ - int i; - int phase=0; - - if (verbose > 2) - rprintf(FINFO,"generator starting pid=%d count=%d\n", - (int)getpid(),flist->count); - - for (i = 0; i < flist->count; i++) { - struct file_struct *file = flist->files[i]; - mode_t saved_mode = file->mode; - if (!file->basename) continue; - - /* we need to ensure that any directories we create have writeable - permissions initially so that we can create the files within - them. This is then fixed after the files are transferred */ - if (!am_root && S_ISDIR(file->mode)) { - file->mode |= S_IWUSR; /* user write */ - } - - recv_generator(local_name?local_name:f_name(file), - flist,i,f); - - file->mode = saved_mode; - } - - phase++; - csum_length = SUM_LENGTH; - ignore_times=1; - - if (verbose > 2) - rprintf(FINFO,"generate_files phase=%d\n",phase); - - write_int(f,-1); - - /* we expect to just sit around now, so don't exit on a - timeout. If we really get a timeout then the other process should - exit */ - io_timeout = 0; - - if (remote_version >= 13) { - /* in newer versions of the protocol the files can cycle through - the system more than once to catch initial checksum errors */ - for (i=read_int(f_recv); i != -1; i=read_int(f_recv)) { - struct file_struct *file = flist->files[i]; - recv_generator(local_name?local_name:f_name(file), - flist,i,f); - } - - phase++; - if (verbose > 2) - rprintf(FINFO,"generate_files phase=%d\n",phase); - - write_int(f,-1); - } -} - diff --git a/sender.c b/sender.c new file mode 100644 index 00000000..91fcc21f --- /dev/null +++ b/sender.c @@ -0,0 +1,220 @@ +/* + Copyright (C) Andrew Tridgell 1996 + Copyright (C) Paul Mackerras 1996 + + 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 + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + 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. +*/ + +#include "rsync.h" + +extern int verbose; +extern int remote_version; +extern int csum_length; +extern struct stats stats; +extern int io_error; +extern int dry_run; +extern int am_server; + + +/* + receive the checksums for a buffer + */ +static struct sum_struct *receive_sums(int f) +{ + struct sum_struct *s; + int i; + OFF_T offset = 0; + + s = (struct sum_struct *)malloc(sizeof(*s)); + if (!s) out_of_memory("receive_sums"); + + s->count = read_int(f); + s->n = read_int(f); + s->remainder = read_int(f); + s->sums = NULL; + + if (verbose > 3) + rprintf(FINFO,"count=%d n=%d rem=%d\n", + s->count,s->n,s->remainder); + + if (s->count == 0) + return(s); + + s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count); + if (!s->sums) out_of_memory("receive_sums"); + + for (i=0;icount;i++) { + s->sums[i].sum1 = read_int(f); + read_buf(f,s->sums[i].sum2,csum_length); + + s->sums[i].offset = offset; + s->sums[i].i = i; + + if (i == s->count-1 && s->remainder != 0) { + s->sums[i].len = s->remainder; + } else { + s->sums[i].len = s->n; + } + offset += s->sums[i].len; + + if (verbose > 3) + rprintf(FINFO,"chunk[%d] len=%d offset=%d sum1=%08x\n", + i,s->sums[i].len,(int)s->sums[i].offset,s->sums[i].sum1); + } + + s->flength = offset; + + return s; +} + + + +void send_files(struct file_list *flist,int f_out,int f_in) +{ + int fd; + struct sum_struct *s; + struct map_struct *buf; + STRUCT_STAT st; + char fname[MAXPATHLEN]; + int i; + struct file_struct *file; + int phase = 0; + + if (verbose > 2) + rprintf(FINFO,"send_files starting\n"); + + setup_readbuffer(f_in); + + while (1) { + int offset=0; + + i = read_int(f_in); + if (i == -1) { + if (phase==0 && remote_version >= 13) { + phase++; + csum_length = SUM_LENGTH; + write_int(f_out,-1); + if (verbose > 2) + rprintf(FINFO,"send_files phase=%d\n",phase); + continue; + } + break; + } + + if (i < 0 || i >= flist->count) { + rprintf(FERROR,"Invalid file index %d (count=%d)\n", + i, flist->count); + exit_cleanup(1); + } + + file = flist->files[i]; + + stats.num_transferred_files++; + stats.total_transferred_size += file->length; + + fname[0] = 0; + if (file->basedir) { + strlcpy(fname,file->basedir,MAXPATHLEN-1); + if (strlen(fname) == MAXPATHLEN-1) { + io_error = 1; + rprintf(FERROR, "send_files failed on long-named directory %s\n", + fname); + return; + } + strlcat(fname,"/",MAXPATHLEN-1); + offset = strlen(file->basedir)+1; + } + strlcat(fname,f_name(file),MAXPATHLEN-strlen(fname)); + + if (verbose > 2) + rprintf(FINFO,"send_files(%d,%s)\n",i,fname); + + if (dry_run) { + if (!am_server && verbose) + rprintf(FINFO,"%s\n",fname); + write_int(f_out,i); + continue; + } + + s = receive_sums(f_in); + if (!s) { + io_error = 1; + rprintf(FERROR,"receive_sums failed\n"); + return; + } + + fd = open(fname,O_RDONLY); + if (fd == -1) { + io_error = 1; + rprintf(FERROR,"send_files failed to open %s: %s\n", + fname,strerror(errno)); + free_sums(s); + continue; + } + + /* map the local file */ + if (do_fstat(fd,&st) != 0) { + io_error = 1; + rprintf(FERROR,"fstat failed : %s\n",strerror(errno)); + free_sums(s); + close(fd); + return; + } + + if (st.st_size > 0) { + buf = map_file(fd,st.st_size); + } else { + buf = NULL; + } + + if (verbose > 2) + rprintf(FINFO,"send_files mapped %s of size %d\n", + fname,(int)st.st_size); + + write_int(f_out,i); + + write_int(f_out,s->count); + write_int(f_out,s->n); + write_int(f_out,s->remainder); + + if (verbose > 2) + rprintf(FINFO,"calling match_sums %s\n",fname); + + if (!am_server && verbose) + rprintf(FINFO,"%s\n",fname+offset); + + match_sums(f_out,s,buf,st.st_size); + + if (buf) unmap_file(buf); + close(fd); + + free_sums(s); + + if (verbose > 2) + rprintf(FINFO,"sender finished %s\n",fname); + } + + if (verbose > 2) + rprintf(FINFO,"send files finished\n"); + + match_report(); + + write_int(f_out,-1); +} + + + + + -- 2.34.1