Tweak the copyright year.

[rsync.git] / pipe.c

diff --git a/pipe.c b/pipe.c
index 3a45dd1141b54d0511d21e9d818e4107832b5907..badfeea0226a5973527cdbbc2a010e4584ce1806 100644 (file)
--- a/pipe.c
+++ b/pipe.c
@@ -1,12 +1,14 @@
-/*  -*- c-file-style: "linux" -*-
+/*
+ * Routines used to setup various kinds of inter-process pipes.
  *
- * Copyright (C) 1996-2000 by Andrew Tridgell
- * Copyright (C) Paul Mackerras 1996
- * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
+ * Copyright (C) 1996-2000 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
+ * Copyright (C) 2004-2019 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
+ * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -14,9 +16,8 @@
  * 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.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
  */
 
 #include "rsync.h"
@@ -24,12 +25,15 @@
 extern int am_sender;
 extern int am_server;
 extern int blocking_io;
-extern int orig_umask;
-extern int read_batch;
 extern int filesfrom_fd;
+extern int munge_symlinks;
+extern char *logfile_name;
+extern int remote_option_cnt;
+extern const char **remote_options;
+extern struct chmod_mode_struct *chmod_modes;
 
 /**
- * Create a child connected to use on stdin/stdout.
+ * Create a child connected to us via its stdin/stdout.
  *
  * This is derived from CVS code
  *
@@ -47,9 +51,8 @@ pid_t piped_child(char **command, int *f_in, int *f_out)
        int to_child_pipe[2];
        int from_child_pipe[2];
 
-       if (verbose >= 2) {
-               print_child_argv(command);
-       }
+       if (DEBUG_GTE(CMD, 1))
+               print_child_argv("opening connection using:", command);
 
        if (fd_pair(to_child_pipe) < 0 || fd_pair(from_child_pipe) < 0) {
                rsyserr(FERROR, errno, "pipe");
@@ -74,7 +77,6 @@ pid_t piped_child(char **command, int *f_in, int *f_out)
                        close(to_child_pipe[0]);
                if (from_child_pipe[1] != STDOUT_FILENO)
                        close(from_child_pipe[1]);
-               umask(orig_umask);
                set_blocking(STDIN_FILENO);
                if (blocking_io > 0)
                        set_blocking(STDOUT_FILENO);
@@ -94,13 +96,26 @@ pid_t piped_child(char **command, int *f_in, int *f_out)
        return pid;
 }
 
-pid_t local_child(int argc, char **argv,int *f_in,int *f_out,
+/* This function forks a child which calls child_main().  First,
+ * however, it has to establish communication paths to and from the
+ * newborn child.  It creates two socket pairs -- one for writing to
+ * the child (from the parent) and one for reading from the child
+ * (writing to the parent).  Since that's four socket ends, each
+ * process has to close the two ends it doesn't need.  The remaining
+ * two socket ends are retained for reading and writing.  In the
+ * child, the STDIN and STDOUT file descriptors refer to these
+ * sockets.  In the parent, the function arguments f_in and f_out are
+ * set to refer to these sockets. */
+pid_t local_child(int argc, char **argv, int *f_in, int *f_out,
                  int (*child_main)(int, char*[]))
 {
        pid_t pid;
        int to_child_pipe[2];
        int from_child_pipe[2];
 
+       /* The parent process is always the sender for a local rsync. */
+       assert(am_sender);
+
        if (fd_pair(to_child_pipe) < 0 ||
            fd_pair(from_child_pipe) < 0) {
                rsyserr(FERROR, errno, "pipe");
@@ -114,11 +129,26 @@ pid_t local_child(int argc, char **argv,int *f_in,int *f_out,
        }
 
        if (pid == 0) {
-               am_sender = read_batch ? 0 : !am_sender;
+               am_sender = 0;
                am_server = 1;
+               filesfrom_fd = -1;
+               munge_symlinks = 0; /* Each side needs its own option. */
+               chmod_modes = NULL; /* Let the sending side handle this. */
+
+               /* Let the client side handle this. */
+               if (logfile_name) {
+                       logfile_name = NULL;
+                       logfile_close();
+               }
 
-               if (!am_sender)
-                       filesfrom_fd = -1;
+               if (remote_option_cnt) {
+                       int rc = remote_option_cnt + 1;
+                       const char **rv = remote_options;
+                       if (!parse_arguments(&rc, &rv)) {
+                               option_error();
+                               exit_cleanup(RERR_SYNTAX);
+                       }
+               }
 
                if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||
                    close(to_child_pipe[1]) < 0 ||
@@ -131,12 +161,12 @@ pid_t local_child(int argc, char **argv,int *f_in,int *f_out,
                        close(to_child_pipe[0]);
                if (from_child_pipe[1] != STDOUT_FILENO)
                        close(from_child_pipe[1]);
+#ifdef ICONV_CONST
+               setup_iconv();
+#endif
                child_main(argc, argv);
        }
 
-       if (!am_sender)
-               filesfrom_fd = -1;
-
        if (close(from_child_pipe[1]) < 0 ||
            close(to_child_pipe[0]) < 0) {
                rsyserr(FERROR, errno, "Failed to close");