X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/654175798bdbdd6403e10c8fa74e8586b3612ea1..06c28400fa4ce46406d4a0bbf417b9b07df0a29a:/receiver.c diff --git a/receiver.c b/receiver.c index 189aa417..18b0795a 100644 --- a/receiver.c +++ b/receiver.c @@ -1,5 +1,6 @@ -/* - Copyright (C) Andrew Tridgell 1996 +/* -*- c-file-style: "linux" -*- + + Copyright (C) 1996-2000 by Andrew Tridgell Copyright (C) Paul Mackerras 1996 This program is free software; you can redistribute it and/or modify @@ -22,7 +23,7 @@ extern int verbose; extern int recurse; extern int delete_mode; -extern int remote_version; +extern int protocol_version; extern int csum_length; extern struct stats stats; extern int dry_run; @@ -33,15 +34,18 @@ extern int cvs_exclude; extern int io_error; extern char *tmpdir; extern char *compare_dest; - +extern int make_backups; +extern int do_progress; +extern char *backup_dir; +extern char *backup_suffix; +extern int backup_suffix_len; static struct delete_list { - dev_t dev; - INO_T inode; + DEV64_T dev; + INO64_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. @@ -55,7 +59,7 @@ static int delete_already_done(struct file_list *flist,int j) for (i=0;imode)) { - if (do_unlink(f_name(f)) != 0) { - rprintf(FERROR,"unlink %s : %s\n",f_name(f),strerror(errno)); + if (!is_dir) { + if (robust_unlink(fn) != 0) { + rprintf(FERROR, "delete_one: unlink %s failed: %s\n", + full_fname(fn), strerror(errno)); } else if (verbose) { - rprintf(FINFO,"deleting %s\n",f_name(f)); + rprintf(FINFO, "deleting %s\n", fn); } } else { - if (do_rmdir(f_name(f)) != 0) { - if (errno != ENOTEMPTY && errno != EEXIST) - rprintf(FERROR,"rmdir %s : %s\n",f_name(f),strerror(errno)); + if (do_rmdir(fn) != 0) { + if (errno != ENOTEMPTY && errno != EEXIST) { + rprintf(FERROR, "delete_one: rmdir %s failed: %s\n", + full_fname(fn), strerror(errno)); + } } else if (verbose) { - rprintf(FINFO,"deleting directory %s\n",f_name(f)); + rprintf(FINFO, "deleting directory %s\n", fn); } } } +static int is_backup_file(char *fn) +{ + int k = strlen(fn) - backup_suffix_len; + return k > 0 && strcmp(fn+k, backup_suffix) == 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) +void delete_files(struct file_list *flist) { struct file_list *local_file_list; int i, j; char *name; + extern int module_id; + extern int ignore_errors; + extern int max_delete; + static int deletion_count; if (cvs_exclude) add_cvs_excludes(); - if (io_error) { + if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) { rprintf(FINFO,"IO error encountered - skipping file deletion\n"); return; } @@ -120,7 +137,7 @@ static void delete_files(struct file_list *flist) if (!S_ISDIR(flist->files[j]->mode) || !(flist->files[j]->flags & FLAG_DELETE)) continue; - if (remote_version < 19 && + if (protocol_version < 19 && delete_already_done(flist, j)) continue; name = strdup(f_name(flist->files[j])); @@ -134,13 +151,23 @@ static void delete_files(struct file_list *flist) rprintf(FINFO,"deleting in %s\n", name); for (i=local_file_list->count-1;i>=0;i--) { + if (max_delete && deletion_count > max_delete) break; if (!local_file_list->files[i]->basename) continue; - if (remote_version < 19 && + if (protocol_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]); - } + char *f = f_name(local_file_list->files[i]); + if (make_backups && (backup_dir || !is_backup_file(f))) { + (void) make_backup(f); + if (verbose) + rprintf(FINFO, "deleting %s\n", f); + } else { + int mode = local_file_list->files[i]->mode; + delete_one(f, S_ISDIR(mode) != 0); + } + deletion_count++; + } } flist_free(local_file_list); free(name); @@ -148,40 +175,63 @@ static void delete_files(struct file_list *flist) } +/* + * get_tmpname() - create a tmp filename for a given filename + * + * If a tmpdir is defined, use that as the directory to + * put it in. Otherwise, the tmp filename is in the same + * directory as the given name. Note that there may be no + * directory at all in the given name! + * + * The tmp filename is basically the given filename with a + * dot prepended, and .XXXXXX appended (for mkstemp() to + * put its unique gunk in). Take care to not exceed + * either the MAXPATHLEN or NAME_MAX, esp. the last, as + * the basename basically becomes 8 chars longer. In that + * case, the original name is shortened sufficiently to + * make it all fit. + * + * Of course, there's no real reason for the tmp name to + * look like the original, except to satisfy us humans. + * As long as it's unique, rsync will work. + */ + static int get_tmpname(char *fnametmp, char *fname) { char *f; + int length = 0; + int maxname; - /* 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; + strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2); + length = strlen(fnametmp); + fnametmp[length++] = '/'; + fnametmp[length] = '\0'; /* always NULL terminated */ + } + + if ((f = strrchr(fname, '/')) != NULL) { + ++f; + if (!tmpdir) { + length = f - fname; + /* copy up to and including the slash */ + strlcpy(fnametmp, fname, length + 1); } - slprintf(fnametmp,MAXPATHLEN-1, "%s/.%s.XXXXXX",tmpdir,f); - return 1; + } else { + f = fname; } + fnametmp[length++] = '.'; + fnametmp[length] = '\0'; /* always NULL terminated */ - f = strrchr(fname,'/'); + maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8); - if (strlen(fname)+9 > MAXPATHLEN) { - rprintf(FERROR,"filename too long\n"); + if (maxname < 1) { + rprintf(FERROR, "temporary filename too long: %s\n", fname); + fnametmp[0] = '\0'; 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); - } + strlcpy(fnametmp + length, f, maxname); + strcat(fnametmp + length, ".XXXXXX"); return 1; } @@ -190,7 +240,9 @@ static int get_tmpname(char *fnametmp, char *fname) 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; + int i; + struct sum_struct sum; + unsigned int len; OFF_T offset = 0; OFF_T offset2; char *data; @@ -198,22 +250,20 @@ static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, 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); + read_sum_head(f_in, &sum); sum_init(); for (i=recv_token(f_in,&data); i != 0; i=recv_token(f_in,&data)) { - - show_progress(offset, total_size); + if (do_progress) + 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); + rprintf(FINFO,"data recv %d at %.0f\n", + i,(double)offset); } stats.literal_data += i; @@ -222,7 +272,8 @@ static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, sum_update(data,i); if (fd != -1 && write_file(fd,data,i) != i) { - rprintf(FERROR,"write failed on %s : %s\n",fname,strerror(errno)); + rprintf(FERROR, "write failed on %s: %s\n", + full_fname(fname), strerror(errno)); exit_cleanup(RERR_FILEIO); } offset += i; @@ -230,60 +281,65 @@ static int receive_data(int f_in,struct map_struct *buf,int fd,char *fname, } i = -(i+1); - offset2 = i*n; - len = n; - if (i == count-1 && remainder != 0) - len = remainder; + offset2 = i*(OFF_T)sum.blength; + len = sum.blength; + if (i == (int) sum.count-1 && sum.remainder != 0) + len = sum.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); + rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n", + i,len,(double)offset2,(double)offset); - map = map_ptr(buf,offset2,len); + if (buf) { + map = map_ptr(buf,offset2,len); - see_token(map, len); - sum_update(map,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)); + if (fd != -1 && write_file(fd,map,len) != (int) len) { + rprintf(FERROR, "write failed on %s: %s\n", + full_fname(fname), strerror(errno)); exit_cleanup(RERR_FILEIO); } offset += len; } - end_progress(); + if (do_progress) + end_progress(total_size); if (fd != -1 && offset > 0 && sparse_end(fd) != 0) { - rprintf(FERROR,"write failed on %s : %s\n", - fname,strerror(errno)); + rprintf(FERROR, "write failed on %s: %s\n", + full_fname(fname), strerror(errno)); exit_cleanup(RERR_FILEIO); } 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; - } + 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; } - +/** + * main routine for receiver process. + * + * Receiver process runs on the same host as the generator process. */ 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 template[MAXPATHLEN]; char fnametmp[MAXPATHLEN]; char *fnamecmp; char fnamecmpbuf[MAXPATHLEN]; @@ -293,22 +349,21 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) int phase=0; int recv_ok; extern struct stats stats; + extern int preserve_perms; + extern int delete_after; + extern int orig_umask; struct stats initial_stats; 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) { + if (phase==0) { phase++; csum_length = SUM_LENGTH; if (verbose > 2) @@ -335,8 +390,8 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) fname = local_name; if (dry_run) { - if (!am_server) { - log_transfer(file, fname); + if (!am_server && verbose) { /* log transfer */ + rprintf(FINFO, "%s\n", fname); } continue; } @@ -349,34 +404,54 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) fnamecmp = fname; /* open the file */ - fd1 = open(fnamecmp,O_RDONLY); + fd1 = do_open(fnamecmp, O_RDONLY, 0); if ((fd1 == -1) && (compare_dest != NULL)) { /* try the file at compare_dest instead */ - slprintf(fnamecmpbuf,MAXPATHLEN-1,"%s/%s", + snprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s", compare_dest,fname); fnamecmp = fnamecmpbuf; - fd1 = open(fnamecmp,O_RDONLY); + fd1 = do_open(fnamecmp, O_RDONLY, 0); } if (fd1 != -1 && do_fstat(fd1,&st) != 0) { - rprintf(FERROR,"fstat %s : %s\n",fnamecmp,strerror(errno)); + rprintf(FERROR, "fstat %s failed: %s\n", + full_fname(fnamecmp), 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",fnamecmp); - receive_data(f_in,NULL,-1,NULL,file->length); + if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) { + /* this special handling for directories + * wouldn't be necessary if robust_rename() + * and the underlying robust_unlink could cope + * with directories + */ + rprintf(FERROR,"recv_files: %s is a directory\n", + full_fname(fnamecmp)); + receive_data(f_in, NULL, -1, NULL, file->length); close(fd1); continue; } + if (fd1 != -1 && !S_ISREG(st.st_mode)) { + close(fd1); + fd1 = -1; + buf = NULL; + } + + if (fd1 != -1 && !preserve_perms) { + /* if the file exists already and we aren't preserving + permissions then act as though the remote end sent + us the file permissions we already have */ + file->mode = st.st_mode; + } + 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",fnamecmp,(int)st.st_size); + rprintf(FINFO,"recv mapped %s of size %.0f\n",fnamecmp,(double)st.st_size); } else { buf = NULL; } @@ -387,29 +462,27 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) 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; - } + strlcpy(template, fnametmp, sizeof(template)); /* 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); + this out. We also set it initially without group + access because of a similar race condition. */ + fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS); + /* in most cases parent directories will already exist + because their information should have been previously + transferred, but that may not be the case with -R */ 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); + create_directory_path(fnametmp, orig_umask) == 0) { + strlcpy(fnametmp, template, sizeof(fnametmp)); + fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS); } if (fd2 == -1) { - rprintf(FERROR,"open %s : %s\n",fnametmp,strerror(errno)); + rprintf(FERROR, "mkstemp %s failed: %s\n", + full_fname(fnametmp), strerror(errno)); receive_data(f_in,buf,-1,NULL,file->length); if (buf) unmap_file(buf); if (fd1 != -1) close(fd1); @@ -418,8 +491,8 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) cleanup_set(fnametmp, fname, file, buf, fd1, fd2); - if (!am_server) { - log_transfer(file, fname); + if (!am_server && verbose) { /* log transfer */ + rprintf(FINFO, "%s\n", fname); } /* recv file data */ @@ -439,11 +512,11 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) 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); + full_fname(fname)); } else { if (verbose > 1) rprintf(FINFO,"redoing %s(%d)\n",fname,i); @@ -452,15 +525,21 @@ int recv_files(int f_in,struct file_list *flist,char *local_name,int f_gen) } } + if (delete_after) { + if (recurse && delete_mode && !local_name && flist->count>0) { + delete_files(flist); + } + } + if (preserve_hard_links) - do_hard_links(flist); + do_hard_links(); /* 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); + recv_generator(local_name?local_name:f_name(file),flist,i,-1); } if (verbose > 2)