X-Git-Url: http://git.samba.org/samba.git/?p=rsync.git;a=blobdiff_plain;f=rsync.c;h=ca21e5e44bea1b4708c51fcf82e466b4a2bbc7f4;hp=7ad7a9ad09f1b8d7abb1c5deeddb558cf61696ad;hb=b8b0668e85eb3b3350904068eb8d29d499d4e980;hpb=c95da96a0c51c66c8cb2eff97b768a717d9e0c79 diff --git a/rsync.c b/rsync.c index 7ad7a9ad..ca21e5e4 100644 --- a/rsync.c +++ b/rsync.c @@ -1,1210 +1,212 @@ -/* +/* 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" +/* 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 dry_run; +extern int daemon_log_format_has_i; +extern int preserve_times; +extern int omit_dir_times; +extern int am_root; 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 am_sender; +extern int am_generator; +extern int am_starting_up; 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 am_root; -extern int relative_paths; -extern int io_timeout; -extern int io_error; +extern int inplace; +extern int keep_dirlinks; +extern int make_backups; extern struct stats stats; -/* - free a sums struct - */ -static void free_sums(struct sum_struct *s) -{ - if (s->sums) free(s->sums); - free(s); -} - /* - * delete a file or directory. If force_delet is set then delete - * recursively - */ -static int delete_file(char *fname) -{ - DIR *d; - struct dirent *di; - char buf[MAXPATHLEN]; - extern int force_delete; - STRUCT_STAT st; - int ret; - extern int recurse; - - if (do_unlink(fname) == 0 || errno == ENOENT) return 0; - -#if SUPPORT_LINKS - ret = do_lstat(fname, &st); -#else - ret = do_stat(fname, &st); -#endif - if (ret) { - rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno)); - return -1; - } - - if (!S_ISDIR(st.st_mode)) { - rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno)); - return -1; - } - - if (do_rmdir(fname) == 0 || errno == ENOENT) return 0; - if (!force_delete || !recurse || - (errno != ENOTEMPTY && errno != EEXIST)) { - rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno)); - return -1; - } - - /* now we do a recsursive delete on the directory ... */ - d = opendir(fname); - if (!d) { - rprintf(FERROR,"opendir(%s): %s\n", - fname,strerror(errno)); - return -1; - } - - for (di=readdir(d); di; di=readdir(d)) { - char *dname = d_name(di); - if (strcmp(dname,".")==0 || - strcmp(dname,"..")==0) - continue; - slprintf(buf, sizeof(buf)-1, "%s/%s", fname, dname); - if (verbose > 0) - rprintf(FINFO,"deleting %s\n", buf); - if (delete_file(buf) != 0) { - closedir(d); - return -1; - } - } - - closedir(d); - - if (do_rmdir(fname) != 0) { - rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno)); - return -1; - } - - 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 + free a sums struct */ -static struct sum_struct *generate_sums(struct map_struct *buf,OFF_T len,int n) +void free_sums(struct sum_struct *s) { - 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; + if (s->sums) free(s->sums); + free(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 flags) { int updated = 0; STRUCT_STAT st2; - extern int am_daemon; - - if (dry_run) return 0; + int change_uid, change_gid; if (!st) { - if (link_stat(fname,&st2) != 0) { - rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno)); + if (dry_run) + return 1; + if (link_stat(fname, &st2, 0) < 0) { + rsyserr(FERROR, errno, "stat %s failed", + full_fname(fname)); return 0; } st = &st2; } - if (preserve_times && !S_ISLNK(st->st_mode) && - st->st_mtime != file->modtime) { - updated = 1; + if (!preserve_times || S_ISLNK(st->st_mode) + || (S_ISDIR(st->st_mode) && omit_dir_times)) + flags |= PERMS_SKIP_MTIME; + if (!(flags & PERMS_SKIP_MTIME) + && cmp_modtime(st->st_mtime, file->modtime) != 0) { if (set_modtime(fname,file->modtime) != 0) { - rprintf(FERROR,"failed to set times on %s : %s\n", - fname,strerror(errno)); + rsyserr(FERROR, errno, "failed to set times on %s", + full_fname(fname)); return 0; } + updated = 1; } - if ((am_root || !am_daemon) && - ((am_root && preserve_uid && st->st_uid != file->uid) || - (preserve_gid && st->st_gid != file->gid))) { - if (do_lchown(fname, - (am_root&&preserve_uid)?file->uid:-1, - preserve_gid?file->gid:-1) != 0) { - if (preserve_uid && st->st_uid != file->uid) - updated = 1; - if (verbose>1 || preserve_uid) { - rprintf(FERROR,"chown %s : %s\n", - fname,strerror(errno)); - return 0; + change_uid = am_root && preserve_uid && st->st_uid != file->uid; + change_gid = preserve_gid && file->gid != GID_NONE + && st->st_gid != file->gid; +#if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK + if (S_ISLNK(st->st_mode)) + ; + else +#endif + if (change_uid || change_gid) { + if (verbose > 2) { + if (change_uid) { + rprintf(FINFO, + "set uid of %s from %ld to %ld\n", + safe_fname(fname), + (long)st->st_uid, (long)file->uid); } - } else { - updated = 1; + if (change_gid) { + rprintf(FINFO, + "set gid of %s from %ld to %ld\n", + safe_fname(fname), + (long)st->st_gid, (long)file->gid); + } + } + if (do_lchown(fname, + change_uid ? file->uid : st->st_uid, + change_gid ? file->gid : st->st_gid) != 0) { + /* shouldn't have attempted to change uid or gid + * unless have the privilege */ + rsyserr(FERROR, errno, "%s %s failed", + change_uid ? "chown" : "chgrp", + full_fname(fname)); + return 0; } + /* a lchown had been done - we have to re-stat if the + * destination had the setuid or setgid bits set due + * to the side effect of the chown call */ + if (st->st_mode & (S_ISUID | S_ISGID)) { + link_stat(fname, st, + keep_dirlinks && S_ISDIR(st->st_mode)); + } + updated = 1; } #ifdef HAVE_CHMOD - if (preserve_perms && !S_ISLNK(st->st_mode) && - (st->st_mode != file->mode || - (updated && (file->mode & ~ACCESSPERMS)))) { - updated = 1; - if (do_chmod(fname,file->mode) != 0) { - rprintf(FERROR,"failed to set permissions on %s : %s\n", - fname,strerror(errno)); - return 0; + if (!S_ISLNK(st->st_mode)) { + if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { + updated = 1; + if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) { + rsyserr(FERROR, errno, "failed to set permissions on %s", + full_fname(fname)); + return 0; + } } } #endif - - if (verbose > 1 && report) { + + if (verbose > 1 && flags & PERMS_REPORT) { + enum logcode code = daemon_log_format_has_i || dry_run + ? FCLIENT : FINFO; if (updated) - rprintf(FINFO,"%s\n",fname); + rprintf(code, "%s\n", safe_fname(fname)); else - rprintf(FINFO,"%s is uptodate\n",fname); + rprintf(code, "%s is uptodate\n", safe_fname(fname)); } return updated; } -/* choose whether to skip a particular file */ -static int skip_file(char *fname, - struct file_struct *file, STRUCT_STAT *st) +void sig_int(void) { - 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); + /* KLUGE: if the user hits Ctrl-C while ssh is prompting + * for a password, then our cleanup's sending of a SIGUSR1 + * signal to all our children may kill ssh before it has a + * chance to restore the tty settings (i.e. turn echo back + * on). By sleeping for a short time, ssh gets a bigger + * chance to do the right thing. If child processes are + * not ssh waiting for a password, then this tiny delay + * shouldn't hurt anything. */ + msleep(400); + exit_cleanup(RERR_SIGNAL); } -/* use a larger block size for really big files */ -int adapt_block_size(struct file_struct *file, int bsize) +/* finish off a file transfer, renaming the file and setting the permissions + and ownership */ +void finish_transfer(char *fname, char *fnametmp, struct file_struct *file, + int ok_to_set_time, int overwriting_basis) { 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; -} - -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; - 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) -{ - 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)) { - if (i > 0) { - if (verbose > 3) - rprintf(FINFO,"data recv %d at %d\n",i,(int)offset); - - stats.literal_data += i; - 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; - } else { - 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; - } - } - - 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;i 2) + rprintf(FINFO, "finishing %s\n", safe_fname(fname)); + goto do_set_perms; } - return 0; -} - - -/* 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"); + if (make_backups && overwriting_basis && !make_backup(fname)) 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 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; - - if (cleanup_fname && keep_partial) { - finish_transfer(cleanup_new_fname, cleanup_fname, cleanup_file); - } - io_flush(); - if (cleanup_fname && !keep_partial) - do_unlink(cleanup_fname); - signal(SIGUSR1, SIG_IGN); - if (code) { - kill_all(SIGUSR1); - } - exit(code); -} - -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) -{ - if (make_backups) { - char fnamebak[MAXPATHLEN]; - if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) { - rprintf(FERROR,"backup filename too long\n"); - return; - } - slprintf(fnamebak,sizeof(fnamebak)-1,"%s%s",fname,backup_suffix); - if (do_rename(fname,fnamebak) != 0 && errno != ENOENT) { - rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno)); - return; - } - } + /* Change permissions before putting the file into place. */ + set_perms(fnametmp, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME); /* move tmp file over real file */ - if (do_rename(fnametmp,fname) != 0) { - if (errno == EXDEV) { - /* rename failed on cross-filesystem link. - Copy the file instead. */ - if (copy_file(fnametmp,fname, file->mode)) { - rprintf(FERROR,"copy %s -> %s : %s\n", - fnametmp,fname,strerror(errno)); - } else { - set_perms(fname,file,NULL,0); - } - do_unlink(fnametmp); - } else { - rprintf(FERROR,"rename %s -> %s : %s\n", - fnametmp,fname,strerror(errno)); - do_unlink(fnametmp); - } - } else { - set_perms(fname,file,NULL,0); - } -} - - -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_new_fname = NULL; - - 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) - printf("%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); - 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); - 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); - close(fd1); - continue; - } - - if (NULL == do_mktemp(fnametmp)) { - rprintf(FERROR,"mktemp %s failed\n",fnametmp); - receive_data(f_in,buf,-1,NULL); - if (buf) unmap_file(buf); - 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); - if (buf) unmap_file(buf); - close(fd1); - continue; - } - - cleanup_fname = fnametmp; - cleanup_new_fname = fname; - cleanup_file = file; - - if (!am_server && verbose) - printf("%s\n",fname); - - /* recv file data */ - recv_ok = receive_data(f_in,buf,fd2,fname); - - 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; - cleanup_new_fname = NULL; - cleanup_file = 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); - } - } + rprintf(FINFO, "renaming %s to %s\n", + safe_fname(fnametmp), safe_fname(fname)); + } + ret = robust_rename(fnametmp, fname, file->mode & INITACCESSPERMS); + if (ret < 0) { + rsyserr(FERROR, errno, "%s %s -> \"%s\"", + ret == -2 ? "copy" : "rename", + full_fname(fnametmp), safe_fname(fname)); + do_unlink(fnametmp); + return; } - - 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 (ret == 0) { + /* The file was moved into place (not copied), so it's done. */ + return; } - - 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) - printf("%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) - printf("%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); + do_set_perms: + set_perms(fname, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME); } - - -void generate_files(int f,struct file_list *flist,char *local_name,int f_recv) +const char *who_am_i(void) { - 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); - } + if (am_starting_up) + return am_server ? "server" : "client"; + return am_sender ? "sender" : am_generator ? "generator" : "receiver"; } - -