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137 lines
4.3 KiB
137 lines
4.3 KiB
/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/**
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@file mysys/mf_path.cc
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*/
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#include "my_config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "m_string.h"
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#include "my_dbug.h"
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#include "my_inttypes.h"
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#include "my_io.h"
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#include "my_sys.h"
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#include "mysys/my_static.h"
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static char *find_file_in_path(char *to, const char *name);
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/* Finds where program can find it's files.
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pre_pathname is found by first locking at progname (argv[0]).
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if progname contains path the path is returned.
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else if progname is found in path, return it
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else if progname is given and POSIX environment variable "_" is set
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then path is taken from "_".
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If filename doesn't contain a path append MY_BASEDIR_VERSION or
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MY_BASEDIR if defined, else append "/my/running".
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own_path_name_part is concatinated to result.
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my_path puts result in to and returns to */
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char *my_path(char *to, const char *progname, const char *own_pathname_part) {
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char *start, *prog;
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const char *end;
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size_t to_length;
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DBUG_TRACE;
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start = to; /* Return this */
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if (progname &&
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(dirname_part(to, progname, &to_length) ||
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find_file_in_path(to, progname) ||
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((prog = getenv("_")) != 0 && dirname_part(to, prog, &to_length)))) {
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(void)intern_filename(to, to);
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if (!test_if_hard_path(to)) {
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if (!my_getwd(curr_dir, FN_REFLEN, MYF(0)))
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bchange((uchar *)to, 0, (uchar *)curr_dir, strlen(curr_dir),
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strlen(to) + 1);
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}
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} else {
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if ((end = getenv("MY_BASEDIR_VERSION")) == 0 &&
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(end = getenv("MY_BASEDIR")) == 0) {
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#ifdef DEFAULT_BASEDIR
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end = DEFAULT_BASEDIR;
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#else
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end = "/my/";
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#endif
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}
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(void)intern_filename(to, end);
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to = strend(to);
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if (to != start && to[-1] != FN_LIBCHAR) *to++ = FN_LIBCHAR;
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(void)my_stpcpy(to, own_pathname_part);
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}
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DBUG_PRINT("exit", ("to: '%s'", start));
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return start;
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} /* my_path */
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/* test if file without filename is found in path */
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/* Returns to if found and to has dirpart if found, else NullS */
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#if defined(_WIN32)
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#define F_OK 0
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#define PATH_SEP ';'
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#define PROGRAM_EXTENSION ".exe"
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#else
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#define PATH_SEP ':'
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#endif
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static char *find_file_in_path(char *to, const char *name) {
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char *path, *pos, dir[2];
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const char *ext = "";
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if (!(path = getenv("PATH"))) return NullS;
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dir[0] = FN_LIBCHAR;
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dir[1] = 0;
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#ifdef PROGRAM_EXTENSION
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if (!fn_ext(name)[0]) ext = PROGRAM_EXTENSION;
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#endif
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for (pos = path; (pos = strchr(pos, PATH_SEP)); path = ++pos) {
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if (path != pos) {
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strxmov(my_stpnmov(to, path, (uint)(pos - path)), dir, name, ext, NullS);
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if (!access(to, F_OK)) {
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to[(uint)(pos - path) + 1] = 0; /* Return path only */
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return to;
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}
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}
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}
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#ifdef _WIN32
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to[0] = FN_CURLIB;
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strxmov(to + 1, dir, name, ext, NullS);
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if (!access(to, F_OK)) /* Test in current dir */
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{
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to[2] = 0; /* Leave ".\" */
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return to;
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}
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#endif
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return NullS; /* File not found */
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}
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