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/* Copyright (C) 2004 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 "parse.h"
#include <stdio.h>
#include <my_global.h>
#include <my_sys.h>
#include <string.h>
/*
Parse output of the given command
SYNOPSYS
parse_output_and_get_value()
command the command to execue with popen.
word the word to look for (usually an option name)
result the buffer to store the next word (option value)
result_len self-explanatory
DESCRIPTION
Parse output of the "command". Find the "word" and return the next one
RETURN
0 - ok
1 - error occured
*/
int parse_output_and_get_value(const char *command, const char *word,
char *result, size_t result_len)
{
FILE *output;
uint wordlen;
/* should be enought to store the string from the output */
enum { MAX_LINE_LEN= 512 };
char linebuf[MAX_LINE_LEN];
wordlen= strlen(word);
if (!(output= popen(command, "r")))
goto err;
/*
We want fully buffered stream. We also want system to
allocate appropriate buffer.
*/
setvbuf(output, NULL, _IOFBF, 0);
while (fgets(linebuf, sizeof(linebuf) - 1, output))
{
uint lineword_len= 0;
char *linep= linebuf;
linebuf[sizeof(linebuf) - 1]= '\0'; /* safety */
/*
Get the word, which might contain non-alphanumeric characters. (Usually
these are '/', '-' and '.' in the path expressions and filenames)
*/
get_word((const char **) &linep, &lineword_len, NONSPACE);
if (!strncmp(word, linep, wordlen))
{
/*
If we have found the word, return the next one. This is usually
an option value.
*/
linep+= lineword_len; /* swallow the previous one */
get_word((const char **) &linep, &lineword_len, NONSPACE);
if (result_len <= lineword_len)
goto err;
strncpy(result, linep, lineword_len);
result[lineword_len]= '\0';
goto pclose;
}
}
pclose:
/* we are not interested in the termination status */
pclose(output);
return 0;
err:
return 1;
}
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