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/* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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 also distributed 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 included with MySQL.
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/my_getwd.cc
*/
/* my_setwd() and my_getwd() works with intern_filenames !! */
#include "my_config.h"
#include <errno.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_macros.h"
#include "my_sys.h"
#include "my_thread_local.h"
#include "mysys/my_static.h"
#include "mysys_err.h"
#if defined(_WIN32)
#include <direct.h>
#include <dos.h>
#include "m_ctype.h"
#endif
/* Gets current working directory in buff.
SYNPOSIS
my_getwd()
buf Buffer to store result. Can be curr_dir[].
size Size of buffer
MyFlags Flags
NOTES
Directory is allways ended with FN_LIBCHAR
RESULT
0 ok
# error
*/
int my_getwd(char *buf, size_t size, myf MyFlags) {
char *pos;
DBUG_ENTER("my_getwd");
DBUG_PRINT("my", ("buf: %p size: %u MyFlags %d", buf, (uint)size, MyFlags));
if (size < 1) DBUG_RETURN(-1);
if (curr_dir[0]) /* Current pos is saved here */
(void)strmake(buf, &curr_dir[0], size - 1);
else {
if (size < 2) DBUG_RETURN(-1);
if (!getcwd(buf, (uint)(size - 2)) && MyFlags & MY_WME) {
char errbuf[MYSYS_STRERROR_SIZE];
set_my_errno(errno);
my_error(EE_GETWD, MYF(0), errno,
my_strerror(errbuf, sizeof(errbuf), errno));
DBUG_RETURN(-1);
}
if (*((pos = strend(buf)) - 1) != FN_LIBCHAR) /* End with FN_LIBCHAR */
{
pos[0] = FN_LIBCHAR;
pos[1] = 0;
}
(void)strmake(&curr_dir[0], buf, (size_t)(FN_REFLEN - 1));
}
DBUG_RETURN(0);
} /* my_getwd */
/* Set new working directory */
int my_setwd(const char *dir, myf MyFlags) {
int res;
size_t length;
char *pos;
DBUG_ENTER("my_setwd");
DBUG_PRINT("my", ("dir: '%s' MyFlags %d", dir, MyFlags));
const char *start = dir;
if (!dir[0] || (dir[0] == FN_LIBCHAR && dir[1] == 0)) dir = FN_ROOTDIR;
if ((res = chdir(dir)) != 0) {
set_my_errno(errno);
if (MyFlags & MY_WME) {
char errbuf[MYSYS_STRERROR_SIZE];
my_error(EE_SETWD, MYF(0), start, errno,
my_strerror(errbuf, sizeof(errbuf), errno));
}
} else {
if (test_if_hard_path(start)) { /* Hard pathname */
pos = strmake(&curr_dir[0], start, (size_t)FN_REFLEN - 1);
if (pos[-1] != FN_LIBCHAR) {
length = (uint)(pos - (char *)curr_dir);
curr_dir[length] = FN_LIBCHAR; /* must end with '/' */
curr_dir[length + 1] = '\0';
}
} else
curr_dir[0] = '\0'; /* Don't save name */
}
DBUG_RETURN(res);
} /* my_setwd */
/* Test if hard pathname */
/* Returns 1 if dirname is a hard path */
int test_if_hard_path(const char *dir_name) {
if (dir_name[0] == FN_HOMELIB && dir_name[1] == FN_LIBCHAR)
return (home_dir != NullS && test_if_hard_path(home_dir));
if (dir_name[0] == FN_LIBCHAR) return (true);
#ifdef FN_DEVCHAR
return (strchr(dir_name, FN_DEVCHAR) != 0);
#else
return false;
#endif
} /* test_if_hard_path */
/*
Test if a name contains an (absolute or relative) path.
SYNOPSIS
has_path()
name The name to test.
RETURN
true name contains a path.
false name does not contain a path.
*/
bool has_path(const char *name) {
return (strchr(name, FN_LIBCHAR) != nullptr)
#if FN_LIBCHAR != '/'
|| (strchr(name, '/') != nullptr)
#endif
#ifdef FN_DEVCHAR
|| (strchr(name, FN_DEVCHAR) != nullptr)
#endif
;
}
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