X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/53dd3135f13728fbcfce4c85773d9fc97cfce714..c786a7aec545259f857212a2376ee4c274d2e3b6:/rsync.c

diff --git a/rsync.c b/rsync.c
index 0bb9f743..4c34deb4 100644
--- 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.
@@ -24,13 +24,23 @@
 
 extern int verbose;
 extern int dry_run;
+extern int itemize_changes;
 extern int preserve_times;
+extern int omit_dir_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;
+extern int force_delete;
+extern int inplace;
+extern int recurse;
+extern int keep_dirlinks;
 extern int make_backups;
-extern char *backup_suffix;
+extern struct stats stats;
+extern char *backup_dir;
+extern char *log_format;
 
 
 /*
@@ -44,143 +54,187 @@ void free_sums(struct sum_struct *s)
 
 
 /*
- * delete a file or directory. If force_delet is set then delete 
- * recursively 
+ * delete a file or directory. If force_delete is set then delete
+ * recursively
  */
-int delete_file(char *fname)
+int delete_file(char *fname, int mode, int flags)
 {
 	DIR *d;
 	struct dirent *di;
 	char buf[MAXPATHLEN];
-	extern int force_delete;
 	STRUCT_STAT st;
-	int ret;
-	extern int recurse;
+	int zap_dir;
 
-	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));
+	if (!S_ISDIR(mode)) {
+		if (robust_unlink(fname) == 0) {
+			if ((verbose || log_format) && !(flags & DEL_TERSE))
+				log_delete(fname, mode);
+			return 0;
+		}
+		if (errno == ENOENT)
+			return 0;
+		rsyserr(FERROR, errno, "delete_file: unlink %s failed",
+			full_fname(fname));
 		return -1;
 	}
 
-	if (!S_ISDIR(st.st_mode)) {
-		rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
-		return -1;
+	zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
+		&& !(flags & DEL_NO_RECURSE);
+	if (dry_run && zap_dir)
+		errno = ENOTEMPTY;
+	else if (do_rmdir(fname) == 0) {
+		if ((verbose || log_format) && !(flags & DEL_TERSE))
+			log_delete(fname, mode);
+		return 0;
 	}
-
-	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));
+	if (errno == ENOENT)
+		return 0;
+	if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) {
+		rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
+			full_fname(fname));
 		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));
+	if (!(d = opendir(fname))) {
+		rsyserr(FERROR, errno, "delete_file: opendir %s failed",
+			full_fname(fname));
 		return -1;
 	}
 
-	for (di=readdir(d); di; di=readdir(d)) {
+	if (!(flags & DEL_TERSE)) {
+		if (verbose || log_format)
+			log_delete(fname, mode);
+		flags |= DEL_TERSE;
+	}
+
+	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 (dname[0] == '.' && (dname[1] == '\0'
+		    || (dname[1] == '.' && dname[2] == '\0')))
 			continue;
-		slprintf(buf, sizeof(buf), "%s/%s", fname, dname);
-		if (verbose > 0)
-			rprintf(FINFO,"deleting %s\n", buf);
-		if (delete_file(buf) != 0) {
+		pathjoin(buf, sizeof buf, fname, dname);
+
+		if (do_lstat(buf, &st) < 0)
+			continue;
+		if (verbose || log_format)
+			log_delete(buf, st.st_mode);
+		if (delete_file(buf, st.st_mode, flags) != 0) {
 			closedir(d);
 			return -1;
 		}
-	}	
+	}
+	if (errno) {
+		rsyserr(FERROR, errno, "delete_file: readdir %s failed",
+			full_fname(fname));
+		closedir(d);
+		return -1;
+	}
 
 	closedir(d);
-	
-	if (do_rmdir(fname) != 0) {
-		rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+
+	if (do_rmdir(fname) != 0 && errno != ENOENT) {
+		rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
+			full_fname(fname));
 		return -1;
 	}
 
 	return 0;
 }
 
-
 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
-	      int report)
+	      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) {
-		/* 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));
+	if (!preserve_times || S_ISLNK(st->st_mode)
+	 || (S_ISDIR(st->st_mode)
+	  && (omit_dir_times || (make_backups && !backup_dir))))
+		flags |= PERMS_SKIP_MTIME;
+	if (!(flags & PERMS_SKIP_MTIME)
+	    && cmp_modtime(st->st_mtime, file->modtime) != 0) {
+		if (set_modtime(fname,file->modtime) != 0) {
+			rsyserr(FERROR, errno, "failed to set times on %s",
+				full_fname(fname));
 			return 0;
-		} else {
-			updated = 1;
 		}
+		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) {
 		if (updated)
-			rprintf(FINFO,"%s\n",fname);
+			rprintf(FINFO, "%s\n", safe_fname(fname));
 		else
-			rprintf(FINFO,"%s is uptodate\n",fname);
+			rprintf(FINFO, "%s is uptodate\n", safe_fname(fname));
 	}
 	return updated;
 }
@@ -188,58 +242,62 @@ 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);
 }
 
-int make_backup(char *fname)
-{
-	char fnamebak[MAXPATHLEN];
-	if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) {
-		rprintf(FERROR,"backup filename too long\n");
-		return 0;
-	}
-
-	slprintf(fnamebak,sizeof(fnamebak)-1,"%s%s",fname,backup_suffix);
-	if (do_rename(fname,fnamebak) != 0) {
-		if (errno != ENOENT) {
-			rprintf(FERROR,"rename %s %s : s\n",fname,fnamebak,strerror(errno));
-			return 0;
-		}
-	} else if (verbose > 1) {
-		rprintf(FINFO,"backed up %s to %s\n",fname,fnamebak);
-	}
-	return 1;
-}
-
 
 /* 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)
+void finish_transfer(char *fname, char *fnametmp, struct file_struct *file,
+		     int ok_to_set_time, int overwriting_basis)
 {
-	if (make_backups && !make_backup(fname))
+	int ret;
+
+	if (inplace) {
+		if (verbose > 2)
+			rprintf(FINFO, "finishing %s\n", safe_fname(fname));
+		goto do_set_perms;
+	}
+
+	if (make_backups && overwriting_basis && !make_backup(fname))
 		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 & ACCESSPERMS)) {
-				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);
+	if (verbose > 2) {
+		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 (ret == 0) {
+		/* The file was moved into place (not copied), so it's done. */
+		return;
+	}
+    do_set_perms:
+	set_perms(fname, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME);
 }
 
-
-
+const char *who_am_i(void)
+{
+	if (am_sender < 0)
+		return am_server ? "server" : "client";
+	return am_sender ? "sender" : am_generator ? "generator" : "receiver";
+}