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/* Copyright (c) 2000, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
Without limiting anything contained in the foregoing, this file,
which is part of C Driver for MySQL (Connector/C), is also subject to the
Universal FOSS Exception, version 1.0, a copy of which can be found at
http://oss.oracle.com/licenses/universal-foss-exception.
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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301 USA */
/**
@file mysys/mf_path.cc
*/
#include "my_config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "m_string.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "my_io.h"
#include "my_sys.h"
#include "mysys/my_static.h"
static char *find_file_in_path(char *to, const char *name);
/* Finds where program can find it's files.
pre_pathname is found by first locking at progname (argv[0]).
if progname contains path the path is returned.
else if progname is found in path, return it
else if progname is given and POSIX environment variable "_" is set
then path is taken from "_".
If filename doesn't contain a path append MY_BASEDIR_VERSION or
MY_BASEDIR if defined, else append "/my/running".
own_path_name_part is concatenated to result.
my_path puts result in to and returns to */
char *my_path(char *to, const char *progname, const char *own_pathname_part) {
char *start, *prog;
const char *end;
size_t to_length;
DBUG_TRACE;
start = to; /* Return this */
if (progname && (dirname_part(to, progname, &to_length) ||
find_file_in_path(to, progname) ||
((prog = getenv("_")) != nullptr &&
dirname_part(to, prog, &to_length)))) {
(void)intern_filename(to, to);
if (!test_if_hard_path(to)) {
if (!my_getwd(curr_dir, FN_REFLEN, MYF(0)))
bchange((uchar *)to, 0, (uchar *)curr_dir, strlen(curr_dir),
strlen(to) + 1);
}
} else {
if ((end = getenv("MY_BASEDIR_VERSION")) == nullptr &&
(end = getenv("MY_BASEDIR")) == nullptr) {
#ifdef DEFAULT_BASEDIR
end = DEFAULT_BASEDIR;
#else
end = "/my/";
#endif
}
(void)intern_filename(to, end);
to = strend(to);
if (to != start && to[-1] != FN_LIBCHAR) *to++ = FN_LIBCHAR;
(void)my_stpcpy(to, own_pathname_part);
}
DBUG_PRINT("exit", ("to: '%s'", start));
return start;
} /* my_path */
/* test if file without filename is found in path */
/* Returns to if found and to has dirpart if found, else NullS */
#if defined(_WIN32)
#define F_OK 0
#define PATH_SEP ';'
#define PROGRAM_EXTENSION ".exe"
#else
#define PATH_SEP ':'
#endif
static char *find_file_in_path(char *to, const char *name) {
char *path, *pos, dir[2];
const char *ext = "";
if (!(path = getenv("PATH"))) return NullS;
dir[0] = FN_LIBCHAR;
dir[1] = 0;
#ifdef PROGRAM_EXTENSION
if (!fn_ext(name)[0]) ext = PROGRAM_EXTENSION;
#endif
for (pos = path; (pos = strchr(pos, PATH_SEP)); path = ++pos) {
if (path != pos) {
strxmov(my_stpnmov(to, path, (uint)(pos - path)), dir, name, ext, NullS);
if (!access(to, F_OK)) {
to[(uint)(pos - path) + 1] = 0; /* Return path only */
return to;
}
}
}
#ifdef _WIN32
to[0] = FN_CURLIB;
strxmov(to + 1, dir, name, ext, NullS);
if (!access(to, F_OK)) /* Test in current dir */
{
to[2] = 0; /* Leave ".\" */
return to;
}
#endif
return NullS; /* File not found */
}
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