X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/81b07870c8d1b69a594694898111f6c7af6ea419..0f78b81511be65d8fe21af1e6ac674f9e80ac29d:/rsync.c

diff --git a/rsync.c b/rsync.c
index 48aa610d..47268f4d 100644
--- a/rsync.c
+++ b/rsync.c
@@ -1,42 +1,94 @@
 /*
-   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.
-*/
-
-/* this file contains code used by more than one part of the rsync
-   process */
+ * Routines common to more than one of the rsync processes.
+ *
+ * Copyright (C) 1996 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
 
 #include "rsync.h"
+#if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
+#include <iconv.h>
+#endif
+#if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
+#include <libcharset.h>
+#elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
+#include <langinfo.h>
+#endif
 
 extern int verbose;
 extern int dry_run;
+extern int daemon_log_format_has_i;
+extern int preserve_perms;
+extern int preserve_executability;
 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 am_starting_up;
+extern int allow_8bit_chars;
 extern int preserve_uid;
 extern int preserve_gid;
-extern int force_delete;
-extern int recurse;
+extern int inplace;
 extern int keep_dirlinks;
 extern int make_backups;
-extern char *backup_dir;
-extern int inplace;
+extern mode_t orig_umask;
+extern struct stats stats;
+extern struct chmod_mode_struct *daemon_chmod_modes;
+
+#if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
+iconv_t ic_chck = (iconv_t)-1;
+
+static const char *default_charset(void)
+{
+#if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
+	return locale_charset();
+#elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
+	return nl_langinfo(CODESET);
+#else
+	return ""; /* Works with (at the very least) gnu iconv... */
+#endif
+}
+
+void setup_iconv()
+{
+	if (!am_server && !allow_8bit_chars) {
+		const char *defset = default_charset();
 
+		/* It's OK if this fails... */
+		ic_chck = iconv_open(defset, defset);
+
+		if (verbose > 3) {
+			if (ic_chck == (iconv_t)-1) {
+				rprintf(FINFO,
+					"note: iconv_open(\"%s\", \"%s\") failed (%d)"
+					" -- using isprint() instead of iconv().\n",
+					defset, defset, errno);
+			} else {
+				rprintf(FINFO,
+					"note: iconv_open(\"%s\", \"%s\") succeeded.\n",
+					defset, defset);
+			}
+		}
+	}
+}
+#endif
 
 /*
   free a sums struct
@@ -47,131 +99,88 @@ void free_sums(struct sum_struct *s)
 	free(s);
 }
 
-
-/*
- * delete a file or directory. If force_delete is set then delete
- * recursively
- */
-int delete_file(char *fname)
+/* This is only called when we aren't preserving permissions.  Figure out what
+ * the permissions should be and return them merged back into the mode. */
+mode_t dest_mode(mode_t flist_mode, mode_t cur_mode, int exists)
 {
-	DIR *d;
-	struct dirent *di;
-	char buf[MAXPATHLEN];
-	STRUCT_STAT st;
-	int ret;
-
-#if SUPPORT_LINKS
-	ret = do_lstat(fname, &st);
-#else
-	ret = do_stat(fname, &st);
-#endif
-	if (ret)
-		return -1;
-
-	if (!S_ISDIR(st.st_mode)) {
-		if (robust_unlink(fname) == 0 || errno == ENOENT)
-			return 0;
-		rsyserr(FERROR, errno, "delete_file: unlink %s failed",
-			full_fname(fname));
-		return -1;
-	}
-
-	if (do_rmdir(fname) == 0 || errno == ENOENT)
-		return 0;
-	if (!force_delete || !recurse
-	    || (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 ... */
-	if (!(d = opendir(fname))) {
-		rsyserr(FERROR, errno, "delete_file: opendir %s failed",
-			full_fname(fname));
-		return -1;
-	}
-
-	for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
-		char *dname = d_name(di);
-		if (dname[0] == '.' && (dname[1] == '\0'
-		    || (dname[1] == '.' && dname[2] == '\0')))
-			continue;
-		pathjoin(buf, sizeof buf, fname, dname);
-		if (verbose > 0)
-			rprintf(FINFO, "deleting %s\n", safe_fname(buf));
-		if (delete_file(buf) != 0) {
-			closedir(d);
-			return -1;
+	/* If the file already exists, we'll return the local permissions,
+	 * possibly tweaked by the --executability option. */
+	if (exists) {
+		if (preserve_executability && S_ISREG(flist_mode)) {
+			/* If the source file is executable, grant execute
+			 * rights to everyone who can read, but ONLY if the
+			 * file isn't already executable. */
+			if (!(flist_mode & 0111))
+				cur_mode &= ~0111;
+			else if (!(cur_mode & 0111))
+				cur_mode |= (cur_mode & 0444) >> 2;
 		}
-	}
-	if (errno) {
-		rsyserr(FERROR, errno, "delete_file: readdir %s failed",
-			full_fname(fname));
-		closedir(d);
-		return -1;
-	}
-
-	closedir(d);
-
-	if (do_rmdir(fname) != 0) {
-		rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
-			full_fname(fname));
-		return -1;
-	}
-
-	return 0;
+	} else
+		cur_mode = flist_mode & ACCESSPERMS & ~orig_umask;
+	if (daemon_chmod_modes && !S_ISLNK(flist_mode))
+		cur_mode = tweak_mode(cur_mode, daemon_chmod_modes);
+	return (flist_mode & ~CHMOD_BITS) | (cur_mode & CHMOD_BITS);
 }
 
-int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
-	      int flags)
+int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st,
+		   int flags)
 {
 	int updated = 0;
 	STRUCT_STAT st2;
 	int change_uid, change_gid;
 
-	if (dry_run)
-		return 0;
-
 	if (!st) {
+		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_perms && S_ISDIR(file->mode)
+		 && st->st_mode & S_ISGID) {
+			/* We just created this directory and its setgid
+			 * bit is on, so make sure it stays on. */
+			file->mode |= S_ISGID;
+		}
 	}
 
-	if (!preserve_times || S_ISLNK(st->st_mode)
-	    || (make_backups && !backup_dir && S_ISDIR(st->st_mode)))
-		flags |= PERMS_SKIP_MTIME;
-	if (!(flags & PERMS_SKIP_MTIME)
-	    && 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)) {
+	if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times))
+		flags |= ATTRS_SKIP_MTIME;
+	if (!(flags & ATTRS_SKIP_MTIME)
+	    && cmp_time(st->st_mtime, file->modtime) != 0) {
+		int ret = set_modtime(fname, file->modtime, st->st_mode);
+		if (ret < 0) {
 			rsyserr(FERROR, errno, "failed to set times on %s",
 				full_fname(fname));
 			return 0;
 		}
-		updated = 1;
+		if (ret == 0) /* ret == 1 if symlink could not be set */
+			updated = 1;
 	}
 
 	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",
-				    fname, (long)st->st_uid, (long)file->uid);
+					"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);
+					"set gid of %s from %ld to %ld\n",
+					fname,
+					(long)st->st_gid, (long)file->gid);
 			}
 		}
 		if (do_lchown(fname,
@@ -185,8 +194,8 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
 			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 */
+		 * 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));
@@ -195,29 +204,31 @@ 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 & 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;
-			}
+	if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
+		int ret = do_chmod(fname, file->mode);
+		if (ret < 0) {
+			rsyserr(FERROR, errno,
+				"failed to set permissions on %s",
+				full_fname(fname));
+			return 0;
 		}
+		if (ret == 0) /* ret == 1 if symlink could not be set */
+			updated = 1;
 	}
 #endif
 
-	if (verbose > 1 && flags & PERMS_REPORT) {
+	if (verbose > 1 && flags & ATTRS_REPORT) {
+		enum logcode code = daemon_log_format_has_i || dry_run
+				  ? FCLIENT : FINFO;
 		if (updated)
-			rprintf(FINFO,"%s\n",fname);
+			rprintf(code, "%s\n", fname);
 		else
-			rprintf(FINFO,"%s is uptodate\n",fname);
+			rprintf(code, "%s is uptodate\n", fname);
 	}
 	return updated;
 }
 
-
-void sig_int(void)
+RETSIGTYPE sig_int(UNUSED(int val))
 {
 	/* KLUGE: if the user hits Ctrl-C while ssh is prompting
 	 * for a password, then our cleanup's sending of a SIGUSR1
@@ -231,39 +242,66 @@ void sig_int(void)
 	exit_cleanup(RERR_SIGNAL);
 }
 
-
-/* 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)
+/* Finish off a file transfer: renaming the file and setting the file's
+ * attributes (e.g. permissions, ownership, etc.).  If partialptr is not
+ * NULL and the robust_rename() call is forced to copy the temp file, we
+ * stage the file into the partial-dir and then rename it into place. */
+void finish_transfer(char *fname, char *fnametmp, char *partialptr,
+		     struct file_struct *file, int ok_to_set_time,
+		     int overwriting_basis)
 {
 	int ret;
 
-	if (make_backups && !make_backup(fname))
-		return;
-
 	if (inplace) {
 		if (verbose > 2)
 			rprintf(FINFO, "finishing %s\n", fname);
-		goto do_set_perms;
+		fnametmp = fname;
+		goto do_set_file_attrs;
 	}
 
+	if (make_backups && overwriting_basis && !make_backup(fname))
+		return;
+
+	/* Change permissions before putting the file into place. */
+	set_file_attrs(fnametmp, file, NULL,
+		       ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
+
 	/* move tmp file over real file */
 	if (verbose > 2)
 		rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
-	ret = robust_rename(fnametmp, fname, file->mode & INITACCESSPERMS);
+	ret = robust_rename(fnametmp, fname, partialptr,
+			    file->mode & INITACCESSPERMS);
 	if (ret < 0) {
 		rsyserr(FERROR, errno, "%s %s -> \"%s\"",
-		    ret == -2 ? "copy" : "rename",
-		    full_fname(fnametmp), fname);
+			ret == -2 ? "copy" : "rename",
+			full_fname(fnametmp), fname);
 		do_unlink(fnametmp);
 		return;
 	}
-    do_set_perms:
-	set_perms(fname, file, NULL, ok_to_set_time ? 0 : PERMS_SKIP_MTIME);
+	if (ret == 0) {
+		/* The file was moved into place (not copied), so it's done. */
+		return;
+	}
+	/* The file was copied, so tweak the perms of the copied file.  If it
+	 * was copied to partialptr, move it into its final destination. */
+	fnametmp = partialptr ? partialptr : fname;
+
+  do_set_file_attrs:
+	set_file_attrs(fnametmp, file, NULL,
+		       ok_to_set_time ? 0 : ATTRS_SKIP_MTIME);
+
+	if (partialptr) {
+		if (do_rename(fnametmp, fname) < 0) {
+			rsyserr(FERROR, errno, "rename %s -> \"%s\"",
+				full_fname(fnametmp), fname);
+		} else
+			handle_partial_dir(partialptr, PDIR_DELETE);
+	}
 }
 
 const char *who_am_i(void)
 {
-    return am_sender ? "sender" : am_generator ? "generator" : "receiver";
+	if (am_starting_up)
+		return am_server ? "server" : "client";
+	return am_sender ? "sender" : am_generator ? "generator" : "receiver";
 }