extern int am_server;
extern int blocking_io;
extern int orig_umask;
-extern int read_batch;
extern int filesfrom_fd;
+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
*
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");
}
if (pid == 0) {
- am_sender = read_batch ? 0 : !am_sender;
+ am_sender = 0;
am_server = 1;
-
- if (!am_sender)
- filesfrom_fd = -1;
+ filesfrom_fd = -1;
+ chmod_modes = NULL; /* Let the sending side handle this. */
if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||
close(to_child_pipe[1]) < 0 ||
rsyserr(FERROR, errno, "Failed to dup/close");
exit_cleanup(RERR_IPC);
}
- if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]);
- if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]);
+ if (to_child_pipe[0] != STDIN_FILENO)
+ close(to_child_pipe[0]);
+ if (from_child_pipe[1] != STDOUT_FILENO)
+ close(from_child_pipe[1]);
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");