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Commit 71b425be authored by petr@mysql.com's avatar petr@mysql.com
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Merge pchardin@bk-internal.mysql.com:/home/bk/mysql-5.0 

into mysql.com:/home/cps/mysql/trees/mysql-5.0
parents 53595de2 cb44682a
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Showing with 70 additions and 48 deletions
mysys/default_modify.c
View file @ 71b425be
/* Copyright (C) 2005 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "my_global.h"
#include "mysys_priv.h"
#include "m_string.h"
#include <my_dir.h>
#define BUFF_SIZE 1024
#ifdef __WIN__
#define NEWLINE "\r\n"
#define NEWLINE_LEN 2
#else
#define NEWLINE "\n"
#define NEWLINE_LEN 1
#endif
static char *add_option(char *dst, const char *option_value,
const char *option, int remove_option);
/*
Add/remove option to the option file section.
......@@ -15,6 +50,8 @@
into a buffer. Then we look for the option within this section and
change/remove it. In the end we get a buffer with modified version of the
file. Then we write it to the file, truncate it if needed and close it.
Note that there is a small time gap, when the file is incomplete,
and this theoretically might introduce a problem.
RETURN
0 - ok
......@@ -22,24 +59,6 @@
2 - cannot open the file
*/
#include "my_global.h"
#include "mysys_priv.h"
#include "m_string.h"
#include <my_dir.h>
#define BUFF_SIZE 1024
#ifdef __WIN__
#define NEWLINE "\r\n"
#define NEWLINE_LEN 2
#else
#define NEWLINE "\n"
#define NEWLINE_LEN 1
#endif
static char *add_option(char *dst, const char *option_value,
const char *option, int remove_option);
int modify_defaults_file(const char *file_location, const char *option,
const char *option_value,
const char *section_name, int remove_option)
......@@ -47,7 +66,7 @@ int modify_defaults_file(const char *file_location, const char *option,
FILE *cnf_file;
MY_STAT file_stat;
char linebuff[BUFF_SIZE], *src_ptr, *dst_ptr, *file_buffer;
uint optlen, optval_len, sect_len, nr_newlines= 0;
uint opt_len, optval_len, sect_len, nr_newlines= 0;
my_bool in_section= FALSE, opt_applied= 0;
DBUG_ENTER("modify_defaults_file");
......@@ -58,7 +77,7 @@ int modify_defaults_file(const char *file_location, const char *option,
if (my_fstat(fileno(cnf_file), &file_stat, MYF(0)))
goto err;
optlen= (uint) strlen(option);
opt_len= (uint) strlen(option);
optval_len= (uint) strlen(option_value);
/*
......@@ -66,17 +85,18 @@ int modify_defaults_file(const char *file_location, const char *option,
for the option we want to add.
*/
if (!(file_buffer= (char*) my_malloc(sizeof(char) *
(file_stat.st_size +
/* option name len */
optlen +
/* reserve space for newline */
NEWLINE_LEN +
/* reserve for '=' char */
1 +
/* option value len */
optval_len +
/* The ending zero plus some safety */
FN_REFLEN), MYF(MY_WME))))
(file_stat.st_size +
/* option name len */
opt_len +
/* reserve space for newline */
NEWLINE_LEN +
/* reserve for '=' char */
1 +
/* option value len */
optval_len +
/* The ending zero */
1), MYF(MY_WME))))
goto malloc_err;
sect_len= (uint) strlen(section_name);
......@@ -94,10 +114,11 @@ int modify_defaults_file(const char *file_location, const char *option,
continue;
}
if (!opt_applied && in_section && !strncmp(src_ptr, option, optlen) &&
(*(src_ptr + optlen) == '=' ||
my_isspace(&my_charset_latin1, *(src_ptr + optlen)) ||
*(src_ptr + optlen) == '\0'))
/* correct the option */
if (!opt_applied && in_section && !strncmp(src_ptr, option, opt_len) &&
(*(src_ptr + opt_len) == '=' ||
my_isspace(&my_charset_latin1, *(src_ptr + opt_len)) ||
*(src_ptr + opt_len) == '\0'))
{
dst_ptr= add_option(dst_ptr, option_value, option, remove_option);
opt_applied= 1;
......@@ -107,11 +128,12 @@ int modify_defaults_file(const char *file_location, const char *option,
/* If going to new group and we have option to apply, do it now */
if (in_section && !opt_applied && *src_ptr == '[')
{
dst_ptr= add_option(dst_ptr, option_value, option, remove_option);
dst_ptr= add_option(dst_ptr, option_value, option, remove_option);
opt_applied= 1; /* set the flag to do write() later */
}
for (; nr_newlines; nr_newlines--)
dst_ptr= strmov(dst_ptr, NEWLINE);
dst_ptr= strmov(dst_ptr, NEWLINE);
dst_ptr= strmov(dst_ptr, linebuff);
}
/* Look for a section */
......@@ -120,13 +142,13 @@ int modify_defaults_file(const char *file_location, const char *option,
/* Copy the line to the buffer */
if (!strncmp(++src_ptr, section_name, sect_len))
{
src_ptr+= sect_len;
/* Skip over whitespaces. They are allowed after section name */
for (; my_isspace(&my_charset_latin1, *src_ptr); src_ptr++)
{}
src_ptr+= sect_len;
/* Skip over whitespaces. They are allowed after section name */
for (; my_isspace(&my_charset_latin1, *src_ptr); src_ptr++)
{}
if (*src_ptr != ']')
continue; /* Missing closing parenthesis. Assume this was no group */
if (*src_ptr != ']')
continue; /* Missing closing parenthesis. Assume this was no group */
in_section= TRUE;
}
else
......@@ -149,10 +171,10 @@ int modify_defaults_file(const char *file_location, const char *option,
{
/* Don't write the file if there are no changes to be made */
if (my_chsize(fileno(cnf_file), (my_off_t) (dst_ptr - file_buffer), 0,
MYF(MY_WME)) ||
my_fseek(cnf_file, 0, MY_SEEK_SET, MYF(0)) ||
my_fwrite(cnf_file, file_buffer, (uint) (dst_ptr - file_buffer),
MYF(MY_NABP)))
MYF(MY_WME)) ||
my_fseek(cnf_file, 0, MY_SEEK_SET, MYF(0)) ||
my_fwrite(cnf_file, file_buffer, (uint) (dst_ptr - file_buffer),
MYF(MY_NABP)))
goto err;
}
if (my_fclose(cnf_file, MYF(MY_WME)))
......
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