Optimized away a call to cmp_modtime() for a compare-dest file.
[rsync.git] / generator.c
index fd2ac596597d31a968325009129d01075cc6b045..84958b82e3ca5b848afdac98f00713f0ada73051 100644 (file)
 extern int verbose;
 extern int dry_run;
 extern int relative_paths;
+extern int keep_dirlinks;
 extern int preserve_links;
 extern int am_root;
 extern int preserve_devices;
 extern int preserve_hard_links;
+extern int preserve_perms;
+extern int preserve_uid;
+extern int preserve_gid;
 extern int update_only;
 extern int opt_ignore_existing;
 extern int csum_length;
@@ -40,28 +44,34 @@ extern int protocol_version;
 extern int always_checksum;
 extern char *compare_dest;
 extern int link_dest;
+extern int whole_file;
+extern int local_server;
+extern int read_batch;
+extern int write_batch;
+extern int list_only;
+extern int only_existing;
+extern int orig_umask;
+extern int safe_symlinks;
+extern unsigned int block_size;
+
+extern struct exclude_list_struct server_exclude_list;
 
 
 /* choose whether to skip a particular file */
-static int skip_file(char *fname,
-                    struct file_struct *file, STRUCT_STAT *st)
+static int skip_file(char *fname, struct file_struct *file, STRUCT_STAT *st)
 {
-       if (st->st_size != file->length) {
+       if (st->st_size != file->length)
                return 0;
-       }
        if (link_dest) {
-               extern int preserve_perms;
-               extern int preserve_uid;
-               extern int preserve_gid;
-
                if (preserve_perms
-                   && (st->st_mode & ~_S_IFMT) != (file->mode & ~_S_IFMT))
+                   && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
                        return 0;
 
-               if (preserve_uid && st->st_uid != file->uid)
+               if (am_root && preserve_uid && st->st_uid != file->uid)
                        return 0;
 
-               if (preserve_gid && st->st_gid != file->gid)
+               if (preserve_gid && file->gid != GID_NONE
+                   && st->st_gid != file->gid)
                        return 0;
        }
 
@@ -73,40 +83,34 @@ static int skip_file(char *fname,
 
                if (compare_dest != NULL) {
                        if (access(fname, 0) != 0) {
-                               snprintf(fnamecmpdest,MAXPATHLEN,"%s/%s",
-                                        compare_dest,fname);
+                               pathjoin(fnamecmpdest, sizeof fnamecmpdest,
+                                        compare_dest, fname);
                                fname = fnamecmpdest;
                        }
                }
                file_checksum(fname,sum,st->st_size);
-               if (protocol_version < 21) {
-                       return (memcmp(sum,file->sum,2) == 0);
-               } else {
-                       return (memcmp(sum,file->sum,MD4_SUM_LENGTH) == 0);
-               }
+               return memcmp(sum, file->u.sum, protocol_version < 21 ? 2
+                                                       : MD4_SUM_LENGTH) == 0;
        }
 
-       if (size_only) {
+       if (size_only)
                return 1;
-       }
 
-       if (ignore_times) {
+       if (ignore_times)
                return 0;
-       }
 
-       return (cmp_modtime(st->st_mtime,file->modtime) == 0);
+       return cmp_modtime(st->st_mtime, file->modtime) == 0;
 }
 
 
 /*
- *     NULL sum_struct means we have no checksums
+ * NULL sum_struct means we have no checksums
  */
-
 void write_sum_head(int f, struct sum_struct *sum)
 {
        static struct sum_struct null_sum;
 
-       if (sum == (struct sum_struct *)NULL)
+       if (sum == NULL)
                sum = &null_sum;
 
        write_int(f, sum->count);
@@ -116,11 +120,11 @@ void write_sum_head(int f, struct sum_struct *sum)
        write_int(f, sum->remainder);
 }
 
-/* 
+/*
  * set (initialize) the size entries in the per-file sum_struct
- * calulating dynamic block ans checksum sizes.
+ * calculating dynamic block and checksum sizes.
  *
- * This is only called from generate_and_send_sums() but is a seperate
+ * This is only called from generate_and_send_sums() but is a separate
  * function to encapsulate the logic.
  *
  * The block size is a rounded square root of file length.
@@ -136,8 +140,8 @@ void write_sum_head(int f, struct sum_struct *sum)
 
 static void sum_sizes_sqroot(struct sum_struct *sum, uint64 len)
 {
-       extern int block_size;
-       int blength, s2length, b;
+       unsigned int blength;
+       int s2length;
        uint32 c;
        uint64 l;
 
@@ -166,7 +170,7 @@ static void sum_sizes_sqroot(struct sum_struct *sum, uint64 len)
        } else if (csum_length == SUM_LENGTH) {
                s2length = SUM_LENGTH;
        } else {
-               b = BLOCKSUM_BIAS;
+               int b = BLOCKSUM_BIAS;
                l = len;
                while (l >>= 1) {
                        b += 2;
@@ -191,10 +195,9 @@ static void sum_sizes_sqroot(struct sum_struct *sum, uint64 len)
        sum->remainder  = (len % blength);
 
        if (sum->count && verbose > 2) {
-               rprintf(FINFO, "count=%ld rem=%ld blength=%ld s2length=%ld flength=%.0f\n",
-                       (long) sum->count, (long) sum->remainder,
-                       (long) sum->blength, (long) sum->s2length,
-                       (double) sum->flength);
+               rprintf(FINFO, "count=%.0f rem=%u blength=%u s2length=%d flength=%.0f\n",
+                       (double)sum->count, sum->remainder, sum->blength,
+                       sum->s2length, (double)sum->flength);
        }
 }
 
@@ -209,13 +212,9 @@ static void sum_sizes_sqroot(struct sum_struct *sum, uint64 len)
  * Whew. */
 static BOOL disable_deltas_p(void)
 {
-       extern int whole_file;
-       extern int local_server;
-       extern int write_batch;
-
        if (whole_file > 0)
                return True;
-       if (whole_file == 0 || write_batch)
+       if (whole_file == 0 || write_batch || read_batch)
                return False;
        return local_server;
 }
@@ -226,7 +225,7 @@ static BOOL disable_deltas_p(void)
  *
  * Generate approximately one checksum every block_len bytes.
  */
-static void generate_and_send_sums(struct map_struct *buf, OFF_T len, int f_out)
+static void generate_and_send_sums(struct map_struct *buf, size_t len, int f_out)
 {
        size_t i;
        struct sum_struct sum;
@@ -237,7 +236,7 @@ static void generate_and_send_sums(struct map_struct *buf, OFF_T len, int f_out)
        write_sum_head(f_out, &sum);
 
        for (i = 0; i < sum.count; i++) {
-               int n1 = MIN(len, sum.blength);
+               unsigned int n1 = MIN(len, sum.blength);
                char *map = map_ptr(buf, offset, n1);
                uint32 sum1 = get_checksum1(map, n1);
                char sum2[SUM_LENGTH];
@@ -246,8 +245,9 @@ static void generate_and_send_sums(struct map_struct *buf, OFF_T len, int f_out)
 
                if (verbose > 3) {
                        rprintf(FINFO,
-                               "chunk[%ld] offset=%.0f len=%d sum1=%08lx\n",
-                               (long)i,(double)offset,n1,(unsigned long)sum1);
+                               "chunk[%.0f] offset=%.0f len=%u sum1=%08lx\n",
+                               (double)i, (double)offset, n1,
+                               (unsigned long)sum1);
                }
                write_int(f_out, sum1);
                write_buf(f_out, sum2, sum.s2length);
@@ -266,31 +266,37 @@ static void generate_and_send_sums(struct map_struct *buf, OFF_T len, int f_out)
  * @note This comment was added later by mbp who was trying to work it
  * out.  It might be wrong.
  **/
-void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
+void recv_generator(char *fname, struct file_struct *file, int i, int f_out)
 {
        int fd;
        STRUCT_STAT st;
        struct map_struct *mapbuf;
        int statret;
-       struct file_struct *file = flist->files[i];
        char *fnamecmp;
        char fnamecmpbuf[MAXPATHLEN];
-       extern char *compare_dest;
-       extern int list_only;
-       extern int preserve_perms;
-       extern int only_existing;
-       extern int orig_umask;
 
-       if (list_only) return;
+       if (list_only)
+               return;
 
        if (verbose > 2)
                rprintf(FINFO,"recv_generator(%s,%d)\n",fname,i);
 
-       statret = link_stat(fname,&st);
+       if (server_exclude_list.head
+           && check_exclude(&server_exclude_list, fname,
+                            S_ISDIR(file->mode)) < 0) {
+               if (verbose) {
+                       rprintf(FINFO, "skipping server-excluded file \"%s\"\n",
+                               fname);
+               }
+               return;
+       }
+
+       statret = link_stat(fname, &st, keep_dirlinks && S_ISDIR(file->mode));
 
        if (only_existing && statret == -1 && errno == ENOENT) {
                /* we only want to update existing files */
-               if (verbose > 1) rprintf(FINFO, "not creating new file \"%s\"\n",fname);
+               if (verbose > 1)
+                       rprintf(FINFO, "not creating new file \"%s\"\n", fname);
                return;
        }
 
@@ -300,7 +306,8 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                /* if the file exists already and we aren't perserving
                 * permissions then act as though the remote end sent
                 * us the file permissions we already have */
-               file->mode = (file->mode & _S_IFMT) | (st.st_mode & ~_S_IFMT);
+               file->mode = (file->mode & ~CHMOD_BITS)
+                          | (st.st_mode & CHMOD_BITS);
        }
 
        if (S_ISDIR(file->mode)) {
@@ -310,27 +317,30 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                 * we need to delete it.  If it doesn't exist, then
                 * recursively create it. */
 
-               if (dry_run) return; /* XXXX -- might cause inaccuracies?? -- mbp */
+               if (dry_run)
+                       return; /* TODO: causes inaccuracies -- fix */
                if (statret == 0 && !S_ISDIR(st.st_mode)) {
                        if (robust_unlink(fname) != 0) {
-                               rprintf(FERROR,
-                                       "recv_generator: unlink %s to make room for directory: %s\n",
-                                       full_fname(fname), strerror(errno));
+                               rsyserr(FERROR, errno,
+                                       "recv_generator: unlink %s to make room for directory",
+                                       full_fname(fname));
                                return;
                        }
                        statret = -1;
                }
                if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) {
-                       if (!(relative_paths && errno==ENOENT &&
-                             create_directory_path(fname, orig_umask)==0 &&
-                             do_mkdir(fname,file->mode)==0)) {
-                               rprintf(FERROR, "recv_generator: mkdir %s failed: %s\n",
-                                       full_fname(fname), strerror(errno));
+                       if (!(relative_paths && errno == ENOENT
+                           && create_directory_path(fname, orig_umask) == 0
+                           && do_mkdir(fname, file->mode) == 0)) {
+                               rsyserr(FERROR, errno,
+                                       "recv_generator: mkdir %s failed",
+                                       full_fname(fname));
                        }
                }
-               /* f_out is set to -1 when doing final directory
-                  permission and modification time repair */
-               if (set_perms(fname,file,NULL,0) && verbose && (f_out != -1))
+               /* f_out is set to -1 when doing final directory-permission
+                * and modification-time repair. */
+               if (set_perms(fname, file, statret ? NULL : &st, 0)
+                   && verbose && f_out != -1)
                        rprintf(FINFO,"%s/\n",fname);
                return;
        }
@@ -339,12 +349,11 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
 #if SUPPORT_LINKS
                char lnk[MAXPATHLEN];
                int l;
-               extern int safe_symlinks;
 
-               if (safe_symlinks && unsafe_symlink(file->link, fname)) {
+               if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
                        if (verbose) {
                                rprintf(FINFO, "ignoring unsafe symlink %s -> \"%s\"\n",
-                                       full_fname(fname), file->link);
+                                       full_fname(fname), file->u.link);
                        }
                        return;
                }
@@ -355,8 +364,9 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                                /* A link already pointing to the
                                 * right place -- no further action
                                 * required. */
-                               if (strcmp(lnk,file->link) == 0) {
-                                       set_perms(fname,file,&st,1);
+                               if (strcmp(lnk,file->u.link) == 0) {
+                                       set_perms(fname, file, &st,
+                                                 PERMS_REPORT);
                                        return;
                                }
                        }
@@ -365,13 +375,13 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                         * in place. */
                        delete_file(fname);
                }
-               if (do_symlink(file->link,fname) != 0) {
-                       rprintf(FERROR, "symlink %s -> \"%s\" failed: %s\n",
-                               full_fname(fname), file->link, strerror(errno));
+               if (do_symlink(file->u.link,fname) != 0) {
+                       rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
+                               full_fname(fname), file->u.link);
                } else {
                        set_perms(fname,file,NULL,0);
                        if (verbose) {
-                               rprintf(FINFO,"%s -> %s\n", fname,file->link);
+                               rprintf(FINFO,"%s -> %s\n", fname,file->u.link);
                        }
                }
 #endif
@@ -382,33 +392,29 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
        if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
                if (statret != 0 ||
                    st.st_mode != file->mode ||
-                   (DEV64_T)st.st_rdev != file->rdev) {
+                   st.st_rdev != file->u.rdev) {
                        delete_file(fname);
-                       if (verbose > 2)
+                       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 failed: %s\n",
-                                       full_fname(fname), strerror(errno));
+                                       fname,(int)file->mode,(int)file->u.rdev);
+                       }
+                       if (do_mknod(fname,file->mode,file->u.rdev) != 0) {
+                               rsyserr(FERROR, errno, "mknod %s failed",
+                                       full_fname(fname));
                        } else {
                                set_perms(fname,file,NULL,0);
                                if (verbose)
                                        rprintf(FINFO,"%s\n",fname);
                        }
                } else {
-                       set_perms(fname,file,&st,1);
+                       set_perms(fname, file, &st, PERMS_REPORT);
                }
                return;
        }
 #endif
 
-       if (preserve_hard_links && check_hard_link(file)) {
-               if (verbose > 1) {
-                       rprintf(FINFO, "recv_generator: \"%s\" is a hard link\n",
-                               f_name(file));
-               }
+       if (preserve_hard_links && hard_link_check(file, HL_CHECK_MASTER))
                return;
-       }
 
        if (!S_ISREG(file->mode)) {
                rprintf(FINFO, "skipping non-regular file \"%s\"\n",fname);
@@ -417,11 +423,11 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
 
        fnamecmp = fname;
 
-       if ((statret == -1) && (compare_dest != NULL)) {
+       if (statret == -1 && compare_dest != NULL) {
                /* try the file at compare_dest instead */
                int saveerrno = errno;
-               snprintf(fnamecmpbuf,MAXPATHLEN,"%s/%s",compare_dest,fname);
-               statret = link_stat(fnamecmpbuf,&st);
+               pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, compare_dest, fname);
+               statret = link_stat(fnamecmpbuf, &st, 0);
                if (!S_ISREG(st.st_mode))
                        statret = -1;
                if (statret == -1)
@@ -430,9 +436,8 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                else if (link_dest && !dry_run) {
                        if (do_link(fnamecmpbuf, fname) != 0) {
                                if (verbose > 0) {
-                                       rprintf(FINFO,"link %s => %s : %s\n",
-                                               fnamecmpbuf, fname,
-                                               strerror(errno));
+                                       rsyserr(FINFO, errno, "link %s => %s",
+                                               fnamecmpbuf, fname);
                                }
                        }
                        fnamecmp = fnamecmpbuf;
@@ -443,13 +448,16 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
        }
 
        if (statret == -1) {
+               if (preserve_hard_links && hard_link_check(file, HL_SKIP))
+                       return;
                if (errno == ENOENT) {
                        write_int(f_out,i);
-                       if (!dry_run) write_sum_head(f_out, NULL);
+                       if (!dry_run)
+                               write_sum_head(f_out, NULL);
                } else if (verbose > 1) {
-                       rprintf(FERROR,
-                               "recv_generator: failed to open %s: %s\n",
-                               full_fname(fname), strerror(errno));
+                       rsyserr(FERROR, errno,
+                               "recv_generator: failed to open %s",
+                               full_fname(fname));
                }
                return;
        }
@@ -460,8 +468,11 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                }
 
                /* now pretend the file didn't exist */
+               if (preserve_hard_links && hard_link_check(file, HL_SKIP))
+                       return;
                write_int(f_out,i);
-               if (!dry_run) write_sum_head(f_out, NULL);
+               if (!dry_run)
+                       write_sum_head(f_out, NULL);
                return;
        }
 
@@ -471,7 +482,8 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
                return;
        }
 
-       if (update_only && cmp_modtime(st.st_mtime,file->modtime)>0 && fnamecmp == fname) {
+       if (update_only && fnamecmp == fname
+           && cmp_modtime(st.st_mtime, file->modtime) > 0) {
                if (verbose > 1)
                        rprintf(FINFO,"%s is newer\n",fname);
                return;
@@ -479,7 +491,7 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
 
        if (skip_file(fname, file, &st)) {
                if (fnamecmp == fname)
-                       set_perms(fname,file,&st,1);
+                       set_perms(fname, file, &st, PERMS_REPORT);
                return;
        }
 
@@ -498,9 +510,11 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
        fd = do_open(fnamecmp, O_RDONLY, 0);
 
        if (fd == -1) {
-               rprintf(FERROR, "failed to open %s, continuing: %s\n",
-                       full_fname(fnamecmp), strerror(errno));
+               rsyserr(FERROR, errno, "failed to open %s, continuing",
+                       full_fname(fnamecmp));
                /* pretend the file didn't exist */
+               if (preserve_hard_links && hard_link_check(file, HL_SKIP))
+                       return;
                write_int(f_out,i);
                write_sum_head(f_out, NULL);
                return;
@@ -511,8 +525,10 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
        else
                mapbuf = NULL;
 
-       if (verbose > 3)
-               rprintf(FINFO,"gen mapped %s of size %.0f\n",fnamecmp,(double)st.st_size);
+       if (verbose > 3) {
+               rprintf(FINFO,"gen mapped %s of size %.0f\n", fnamecmp,
+                       (double)st.st_size);
+       }
 
        if (verbose > 2)
                rprintf(FINFO, "generating and sending sums for %d\n", i);
@@ -521,20 +537,21 @@ void recv_generator(char *fname, struct file_list *flist, int i, int f_out)
        generate_and_send_sums(mapbuf, st.st_size, f_out);
 
        close(fd);
-       if (mapbuf) unmap_file(mapbuf);
+       if (mapbuf)
+               unmap_file(mapbuf);
 }
 
 
-
-void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
+void generate_files(int f, struct file_list *flist, char *local_name)
 {
        int i;
        int phase=0;
        char fbuf[MAXPATHLEN];
 
-       if (verbose > 2)
-               rprintf(FINFO,"generator starting pid=%d count=%d\n",
-                       (int)getpid(),flist->count);
+       if (verbose > 2) {
+               rprintf(FINFO, "generator starting pid=%ld count=%d\n",
+                       (long)getpid(), flist->count);
+       }
 
        if (verbose >= 2) {
                rprintf(FINFO,
@@ -550,22 +567,23 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 
        for (i = 0; i < flist->count; i++) {
                struct file_struct *file = flist->files[i];
-               mode_t saved_mode = file->mode;
-               if (!file->basename) continue;
+               struct file_struct copy;
 
+               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 */
+               if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)) {
+                       copy = *file;
                        /* XXX: Could this be causing a problem on SCO?  Perhaps their
                         * handling of permissions is strange? */
+                       copy.mode |= S_IWUSR; /* user write */
+                       file = &copy;
                }
 
-               recv_generator(local_name? local_name
-                            : f_name_to(file,fbuf,sizeof fbuf), flist, i, f);
-
-               file->mode = saved_mode;
+               recv_generator(local_name ? local_name : f_name_to(file, fbuf),
+                              file, i, f);
        }
 
        phase++;
@@ -579,10 +597,10 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
 
        /* 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)) {
+       while ((i = get_redo_num()) != -1) {
                struct file_struct *file = flist->files[i];
-               recv_generator(local_name? local_name
-                            : f_name_to(file,fbuf,sizeof fbuf), flist, i, f);
+               recv_generator(local_name ? local_name : f_name_to(file, fbuf),
+                              file, i, f);
        }
 
        phase++;
@@ -590,4 +608,20 @@ void generate_files(int f,struct file_list *flist,char *local_name,int f_recv)
                rprintf(FINFO,"generate_files phase=%d\n",phase);
 
        write_int(f,-1);
+
+       if (preserve_hard_links)
+               do_hard_links();
+
+       /* now we need to fix any directory permissions that were
+        * modified during the transfer */
+       for (i = 0; i < flist->count; i++) {
+               struct file_struct *file = flist->files[i];
+               if (!file->basename || !S_ISDIR(file->mode))
+                       continue;
+               recv_generator(local_name ? local_name : f_name(file),
+                              file, i, -1);
+       }
+
+       if (verbose > 2)
+               rprintf(FINFO,"generate_files finished\n");
 }