Make idev, hlink and file_struct + strings use allocation
[rsync/rsync.git] / rsync.c
diff --git a/rsync.c b/rsync.c
index 6313267..78fedab 100644 (file)
--- a/rsync.c
+++ b/rsync.c
@@ -1,17 +1,17 @@
-/* 
+/*
    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.
@@ -26,6 +26,9 @@ extern int verbose;
 extern int dry_run;
 extern int preserve_times;
 extern int am_root;
+extern int am_server;
+extern int am_sender;
+extern int am_generator;
 extern int preserve_uid;
 extern int preserve_gid;
 extern int preserve_perms;
@@ -43,8 +46,8 @@ void free_sums(struct sum_struct *s)
 
 
 /*
- * delete a file or directory. If force_delete is set then delete 
- * recursively 
+ * delete a file or directory. If force_delete is set then delete
+ * recursively
  */
 int delete_file(char *fname)
 {
@@ -67,85 +70,60 @@ int delete_file(char *fname)
 
        if (!S_ISDIR(st.st_mode)) {
                if (robust_unlink(fname) == 0 || errno == ENOENT) return 0;
-               rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
+               rprintf(FERROR, "delete_file: unlink %s failed: %s\n",
+                       full_fname(fname), strerror(errno));
                return -1;
        }
 
        if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
-       if (!force_delete || !recurse || 
+       if (!force_delete || !recurse ||
            (errno != ENOTEMPTY && errno != EEXIST)) {
-               rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+               rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
+                       full_fname(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));
+               rprintf(FERROR, "delete_file: opendir %s failed: %s\n",
+                       full_fname(fname), strerror(errno));
                return -1;
        }
 
-       for (di=readdir(d); di; di=readdir(d)) {
+       for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
                char *dname = d_name(di);
-               if (strcmp(dname,".")==0 ||
-                   strcmp(dname,"..")==0)
+               if (strcmp(dname,".") == 0
+                   || strcmp(dname,"..") == 0)
                        continue;
-               slprintf(buf, sizeof(buf), "%s/%s", fname, dname);
+               pathjoin(buf, sizeof buf, 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));
+       }
+       if (errno) {
+               rprintf(FERROR, "delete_file: readdir %s failed: %s\n",
+                       full_fname(fname), strerror(errno));
+               closedir(d);
                return -1;
        }
 
-       return 0;
-}
-
-static int is_in_group(gid_t gid)
-{
-#ifdef GETGROUPS_T
-       static gid_t last_in = (gid_t) -2, last_out;
-       static int ngroups = -2;
-       static GETGROUPS_T *gidset;
-       int n;
-
-       if (gid == last_in)
-               return last_out;
-       if (ngroups < -1) {
-               /* treat failure (-1) as if not member of any group */
-               ngroups = getgroups(0, 0);
-               if (ngroups > 0) {
-                       gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T));
-                       ngroups = getgroups(ngroups, gidset);
-               }
-       }
+       closedir(d);
 
-       last_in = gid;
-       last_out = 0;
-       for (n = 0; n < ngroups; n++) {
-               if (gidset[n] == gid) {
-                       last_out = 1;
-                       break;
-               }
+       if (do_rmdir(fname) != 0) {
+               rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
+                       full_fname(fname), strerror(errno));
+               return -1;
        }
-       return last_out;
 
-#else
        return 0;
-#endif
 }
 
 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
-             int report)
+               int report)
 {
        int updated = 0;
        STRUCT_STAT st2;
@@ -155,20 +133,21 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
 
        if (!st) {
                if (link_stat(fname,&st2) != 0) {
-                       rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
+                       rprintf(FERROR, "stat %s failed: %s\n",
+                               full_fname(fname), strerror(errno));
                        return 0;
                }
                st = &st2;
        }
 
        if (preserve_times && !S_ISLNK(st->st_mode) &&
-           st->st_mtime != file->modtime) {
+           cmp_modtime(st->st_mtime, file->modtime) != 0) {
                /* don't complain about not setting times on directories
                   because some filesystems can't do it */
                if (set_modtime(fname,file->modtime) != 0 &&
                    !S_ISDIR(st->st_mode)) {
-                       rprintf(FERROR,"failed to set times on %s : %s\n",
-                               fname,strerror(errno));
+                       rprintf(FERROR, "failed to set times on %s: %s\n",
+                               full_fname(fname), strerror(errno));
                        return 0;
                } else {
                        updated = 1;
@@ -176,20 +155,29 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
        }
 
        change_uid = am_root && preserve_uid && st->st_uid != file->uid;
-       change_gid = preserve_gid && file->gid != (gid_t) -1 && \
-                               st->st_gid != file->gid;
-       if (change_gid && !am_root) {
-               /* enforce bsd-style group semantics: non-root can only
-                   change to groups that the user is a member of */
-               change_gid = is_in_group(file->gid);
-       }
+       change_gid = preserve_gid && file->gid != GID_NONE
+               && st->st_gid != file->gid;
        if (change_uid || change_gid) {
+               if (verbose > 2 && !dry_run) {
+                       if (change_uid) {
+                               rprintf(FINFO,
+                                   "set uid of %s from %ld to %ld\n",
+                                   fname, (long)st->st_uid, (long)file->uid);
+                       }
+                       if (change_gid) {
+                               rprintf(FINFO,
+                                   "set gid of %s from %ld to %ld\n",
+                                   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 */
-                       rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno));
+                       rprintf(FERROR, "%s %s failed: %s\n",
+                               change_uid ? "chown" : "chgrp",
+                               full_fname(fname), strerror(errno));
                        return 0;
                }
                /* a lchown had been done - we have to re-stat if the
@@ -203,17 +191,17 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
 
 #ifdef HAVE_CHMOD
        if (!S_ISLNK(st->st_mode)) {
-               if (st->st_mode != file->mode) {
+               if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
                        updated = 1;
-                       if (do_chmod(fname,file->mode) != 0) {
-                               rprintf(FERROR,"failed to set permissions on %s : %s\n",
-                                       fname,strerror(errno));
+                       if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) {
+                               rprintf(FERROR, "failed to set permissions on %s: %s\n",
+                                       full_fname(fname), strerror(errno));
                                return 0;
                        }
                }
        }
 #endif
-    
+
        if (verbose > 1 && report) {
                if (updated)
                        rprintf(FINFO,"%s\n",fname);
@@ -226,6 +214,15 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
 
 void sig_int(void)
 {
+       /* 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);
 }
 
@@ -240,20 +237,26 @@ void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
        /* move tmp file over real file */
        if (robust_rename(fnametmp,fname) != 0) {
                if (errno == EXDEV) {
-                       /* rename failed on cross-filesystem link.  
+                       /* rename failed on cross-filesystem link.
                           Copy the file instead. */
                        if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) {
-                               rprintf(FERROR,"copy %s -> %s : %s\n",
-                                       fnametmp,fname,strerror(errno));
+                               rprintf(FERROR, "copy %s -> \"%s\": %s\n",
+                                       full_fname(fnametmp), fname,
+                                       strerror(errno));
                        } else {
                                set_perms(fname,file,NULL,0);
                        }
                } else {
-                       rprintf(FERROR,"rename %s -> %s : %s\n",
-                               fnametmp,fname,strerror(errno));
+                       rprintf(FERROR,"rename %s -> \"%s\": %s\n",
+                               full_fname(fnametmp), fname, strerror(errno));
                }
                do_unlink(fnametmp);
        } else {
                set_perms(fname,file,NULL,0);
        }
 }
+
+const char *who_am_i(void)
+{
+    return am_sender ? "sender" : am_generator ? "generator" : "receiver";
+}