304 lines
9.3 KiB
C
304 lines
9.3 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#ifdef LINUX
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#define __USE_GNU
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#endif
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#include <dlfcn.h>
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#include <cppuhelper/findsofficepath.h>
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#include <rtl/string.h>
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#include <sal/types.h>
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static char* getPath(void);
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static char* createCommandName( char* argv0 );
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static const int SEPARATOR = '/';
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static const char* PATHSEPARATOR = ":";
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/*
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* The main function implements a loader for applications which use UNO.
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*
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* <p>This code runs on the Unix/Linux platforms only.</p>
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*
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* <p>The main function detects a UNO installation on the system and adds the
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* relevant directories of the installation to the LD_LIBRARY_PATH environment
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* variable. After that, the application process is loaded and started, whereby
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* the new process inherits the environment of the calling process, including
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* the modified LD_LIBRARY_PATH environment variable. The application's
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* executable name must be the same as the name of this executable, prefixed
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* by '_'.</p>
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* <p>On MACOSX DYLD_LIBRARY_PATH is used instead of LD_LIBRARY_PATH!<p>
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*
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* <p>A UNO installation can be specified by the user by setting the UNO_PATH
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* environment variable to the program directory of the UNO installation.
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* If no installation is specified by the user, the default installation on
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* the system will be taken. The default installation is found from the
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* PATH environment variable. This requires that the 'soffice' executable or
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* a symbolic link is in one of the directories listed in the PATH environment
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* variable.</p>
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*/
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int main( int argc, char *argv[] )
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{
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char* path;
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char* cmdname;
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(void) argc; /* avoid warning about unused parameter */
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/* get the path of the UNO installation */
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path = getPath();
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if ( path != NULL )
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{
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#if defined(MACOSX)
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static const char* ENVVARNAME = "DYLD_LIBRARY_PATH";
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#else
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static const char* ENVVARNAME = "LD_LIBRARY_PATH";
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#endif
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char* libpath;
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char* value;
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char* envstr;
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int size;
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size_t pathlen = strlen(path);
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struct stat stats;
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int ret;
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static char const unoinfoSuffix[] = "/unoinfo";
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char * unoinfo = malloc(
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pathlen + RTL_CONSTASCII_LENGTH(unoinfoSuffix) + 1);
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/*TODO: overflow */
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if (unoinfo == NULL) {
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free(path);
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fprintf(stderr, "Error: out of memory!\n");
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exit(EXIT_FAILURE);
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}
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strcpy(unoinfo, path);
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strcpy(
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unoinfo + pathlen,
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unoinfoSuffix + (pathlen == 0 || path[pathlen - 1] != '/' ? 0 : 1));
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ret = lstat(unoinfo, &stats);
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free(unoinfo);
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if (ret == 0) {
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char * cmd = malloc(
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2 * pathlen + RTL_CONSTASCII_LENGTH("/unoinfo c++") + 1);
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/*TODO: overflow */
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char const * p;
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char * q;
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FILE * f;
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size_t n = 1000;
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size_t old = 0;
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if (cmd == NULL) {
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fprintf(stderr, "Error: out of memory!\n");
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exit(EXIT_FAILURE);
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}
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p = path;
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q = cmd;
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while (*p != '\0') {
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*q++ = '\\';
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*q++ = *p++;
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}
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if (p == path || p[-1] != '/') {
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*q++ = '/';
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}
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strcpy(q, "unoinfo c++");
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f = popen(cmd, "r");
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free(cmd);
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if (f == NULL)
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{
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fprintf(stderr, "Error: calling unoinfo failed!\n");
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exit(EXIT_FAILURE);
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}
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libpath = NULL;
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for (;;) {
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size_t m;
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libpath = realloc(libpath, n);
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if (libpath == NULL) {
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fprintf(
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stderr,
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"Error: out of memory reading unoinfo output!\n");
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exit(EXIT_FAILURE);
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}
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m = fread(libpath + old, 1, n - old - 1, f);
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if (m != n - old - 1) {
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if (ferror(f)) {
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fprintf(stderr, "Error: cannot read unoinfo output!\n");
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exit(EXIT_FAILURE);
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}
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libpath[old + m] = '\0';
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break;
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}
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if (n >= SAL_MAX_SIZE / 2) {
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fprintf(
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stderr,
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"Error: out of memory reading unoinfo output!\n");
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exit(EXIT_FAILURE);
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}
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old = n - 1;
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n *= 2;
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}
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if (pclose(f) != 0) {
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fprintf(stderr, "Error: executing unoinfo failed!\n");
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exit(EXIT_FAILURE);
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}
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free(path);
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}
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else
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{
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/* Assume an old OOo 2.x installation without unoinfo: */
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libpath = path;
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}
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value = getenv( ENVVARNAME );
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// workaround for finding wrong libsqlite3.dylib in the office installation
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// For MacOS > 10.6 nss uses the system lib -> unresolved symbol _sqlite3_wal_checkpoint
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#ifdef MACOSX
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size = strlen( ENVVARNAME ) + strlen( "=/usr/lib:" ) + strlen( libpath ) + 1;
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#else
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size = strlen( ENVVARNAME ) + strlen( "=" ) + strlen( libpath ) + 1;
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#endif
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if ( value != NULL )
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size += strlen( PATHSEPARATOR ) + strlen( value );
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envstr = (char*) malloc( size );
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strcpy( envstr, ENVVARNAME );
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#ifdef MACOSX
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strcat( envstr, "=/usr/lib:" );
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#else
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strcat( envstr, "=" );
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#endif
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strcat( envstr, libpath );
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free( libpath );
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if ( value != NULL )
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{
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strcat( envstr, PATHSEPARATOR );
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strcat( envstr, value );
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}
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/* coverity[tainted_data : FALSE] */
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putenv( envstr );
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}
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else
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{
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fprintf( stderr, "Warning: no office installation found!\n" );
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fflush( stderr );
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}
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/* set the executable name for the application process */
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cmdname = createCommandName( argv[0] );
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argv[0] = cmdname;
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/*
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* create the application process;
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* if successful, execvp doesn't return to the calling process
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*/
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/* coverity[tainted_string] - createCommandName creates a safe string */
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execvp( cmdname, argv );
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fprintf( stderr, "Error: execvp failed!\n" );
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fflush( stderr );
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return 0;
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}
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/*
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* Gets the path of a UNO installation.
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*
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* @return the installation path or NULL, if no installation was specified or
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* found, or if an error occurred.
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* Returned pointer must be released with free()
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*/
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char* getPath(void)
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{
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char* path = cppuhelper_detail_findSofficePath();
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if ( path == NULL )
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{
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fprintf( stderr, "Warning: getting path from PATH environment "
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"variable failed!\n" );
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fflush( stderr );
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}
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return path;
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}
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/*
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* Creates the application's executable file name.
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*
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* <p>The application's executable file name is the name of this executable
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* prefixed by '_'.</p>
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*
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* @param argv0 specifies the argv[0] parameter of the main function
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*
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* @return the application's executable file name or NULL, if an error occurred
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*/
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char* createCommandName( char* argv0 )
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{
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const char* CMDPREFIX = "_";
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const char* prgname = NULL;
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char* cmdname = NULL;
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char* sep = NULL;
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Dl_info dl_info;
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/* get the executable file name from argv0 */
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prgname = argv0;
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/*
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* if argv0 doesn't contain an absolute path name, try to get the absolute
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* path name from dladdr; note that this only works for Solaris, not for
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* Linux
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*/
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if ( argv0 != NULL && *argv0 != SEPARATOR &&
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dladdr( (void*) &createCommandName, &dl_info ) &&
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dl_info.dli_fname != NULL && *dl_info.dli_fname == SEPARATOR )
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{
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prgname = dl_info.dli_fname;
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}
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/* prefix the executable file name by '_' */
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if ( prgname != NULL )
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{
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cmdname = (char*) malloc( strlen( prgname ) + strlen( CMDPREFIX ) + 1 );
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sep = strrchr( prgname, SEPARATOR );
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if ( sep != NULL )
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{
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int pos = ++sep - prgname;
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strncpy( cmdname, prgname, pos );
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cmdname[ pos ] = '\0';
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strcat( cmdname, CMDPREFIX );
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strcat( cmdname, sep );
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}
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else
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{
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strcpy( cmdname, CMDPREFIX );
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strcat( cmdname, prgname );
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}
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}
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return cmdname;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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