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|
/* -*- c-file-style: "java"; indent-tabs-mode: nil; tab-width: 4; fill-column: 78 -*-
*
* distcc -- A simple distributed compiler system
*
* Copyright (C) 2002, 2003 by Martin Pool <mbp@samba.org>
* Copyright 2007 Google Inc.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
/**
* @file
*
* Server-specific RPC code.
**/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "distcc.h"
#include "trace.h"
#include "util.h"
#include "rpc.h"
#include "exitcode.h"
#include "dopt.h"
#include "hosts.h"
#include "bulk.h"
#include "snprintf.h"
int dcc_r_request_header(int ifd,
enum dcc_protover *ver_ret)
{
unsigned vers;
int ret;
if ((ret = dcc_r_token_int(ifd, "DIST", &vers)) != 0) {
rs_log_error("client did not provide distcc magic fairy dust");
return ret;
}
if (vers > DCC_VER_3) {
rs_log_error("can't handle requested protocol version is %d", vers);
return EXIT_PROTOCOL_ERROR;
}
*ver_ret = (enum dcc_protover) vers;
return 0;
}
/**
* Receive the working directory from the client
*/
int dcc_r_cwd(int ifd, char **cwd)
{
return dcc_r_token_string(ifd, "CDIR", cwd);
}
/* @p path must be point to malloc'ed memory
* Replaces **path with a pointer to a string containing
* dirname + path.
* path must be absolute.
*/
static int prepend_dir_to_name(const char *dirname, char **path)
{
char *buf;
checked_asprintf(&buf, "%s%s", dirname, *path);
if (buf == NULL) {
return EXIT_OUT_OF_MEMORY;
}
free(*path);
*path = buf;
return 0;
}
int dcc_r_many_files(int in_fd,
const char *dirname,
enum dcc_compress compr)
{
int ret = 0;
unsigned int n_files;
unsigned int i;
char *name = 0;
char *link_target = 0;
char token[5];
if ((ret = dcc_r_token_int(in_fd, "NFIL", &n_files)))
return ret;
for (i = 0; i < n_files; ++i) {
/* like dcc_r_argv */
unsigned int link_or_file_len;
if ((ret = dcc_r_token_string(in_fd, "NAME", &name)))
goto out_cleanup;
/* FIXME: verify that name starts with '/' and doesn't contain '..'. */
if ((ret = prepend_dir_to_name(dirname, &name)))
goto out_cleanup;
if ((ret = dcc_r_sometoken_int(in_fd, token, &link_or_file_len)))
goto out_cleanup;
/* Must prepend the dirname for the file name, a link's target name. */
if (strncmp(token, "LINK", 4) == 0) {
if ((ret = dcc_r_str_alloc(in_fd, link_or_file_len, &link_target))){
goto out_cleanup;
}
/* FIXME: verify that link_target doesn't contain '..'.
* But the include server uses '..' to reference system
* directories (see _MakeLinkFromMirrorToRealLocation
* in include_server/compiler_defaults.py), so we'll need to
* modify that first. */
if (link_target[0] == '/') {
if ((ret = prepend_dir_to_name(dirname, &link_target))) {
goto out_cleanup;
}
}
if ((ret = dcc_mk_tmp_ancestor_dirs(name))) {
goto out_cleanup;
}
if (symlink(link_target, name) != 0) {
rs_log_error("failed to create path for %s: %s", name,
strerror(errno));
ret = 1;
goto out_cleanup;
}
if ((ret = dcc_add_cleanup(name))) {
/* bailing out */
unlink(name);
goto out_cleanup;
}
} else if (strncmp(token, "FILE", 4) == 0) {
if ((ret = dcc_r_file(in_fd, name, link_or_file_len, compr))) {
goto out_cleanup;
}
if ((ret = dcc_add_cleanup(name))) {
/* bailing out */
unlink(name);
goto out_cleanup;
}
} else {
char buf[4 + sizeof(link_or_file_len)];
/* unexpected token */
rs_log_error("protocol derailment: expected token FILE or LINK");
/* We should explain what happened here, but we have already read
* a few more bytes.
*/
strncpy(buf, token, 4);
/* TODO(manos): this is probably not kosher */
memcpy(&buf[4], &link_or_file_len, sizeof(link_or_file_len));
dcc_explain_mismatch(buf, 12, in_fd);
ret = EXIT_PROTOCOL_ERROR;
goto out_cleanup;
}
out_cleanup:
free(name);
name = NULL;
free(link_target);
link_target = NULL;
if (ret)
break;
}
return ret;
}
|
