2005-01-25 11:54:56 +01:00
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/* Copyright (C) 2004 MySQL AB
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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2005-03-22 00:04:14 +01:00
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#include <my_global.h>
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2005-02-11 12:21:59 +01:00
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#include "parse.h"
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2005-06-07 13:47:02 +02:00
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#include "parse_output.h"
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2005-02-11 12:21:59 +01:00
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2005-01-25 11:54:56 +01:00
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#include <stdio.h>
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#include <my_sys.h>
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2005-06-07 13:47:02 +02:00
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#include <m_string.h>
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2005-08-05 20:44:52 +02:00
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#include "portability.h"
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2005-01-25 11:54:56 +01:00
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2005-02-11 12:21:59 +01:00
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/*
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Parse output of the given command
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2005-01-25 11:54:56 +01:00
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2005-02-11 12:21:59 +01:00
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SYNOPSYS
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parse_output_and_get_value()
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2005-01-25 11:54:56 +01:00
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2005-06-07 13:47:02 +02:00
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command the command to execue with popen.
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word the word to look for (usually an option name)
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result the buffer to store the next word (option value)
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input_buffer_len self-explanatory
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flag this equals to GET_LINE if we want to get all the line after
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the matched word and GET_VALUE otherwise.
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2005-01-25 11:54:56 +01:00
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2005-02-11 12:21:59 +01:00
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DESCRIPTION
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2005-01-25 11:54:56 +01:00
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2005-02-11 12:21:59 +01:00
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Parse output of the "command". Find the "word" and return the next one
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2005-06-07 13:47:02 +02:00
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if flag is GET_VALUE. Return the rest of the parsed string otherwise.
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2005-02-13 13:13:33 +01:00
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RETURN
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2005-08-29 21:29:35 +02:00
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0 - ok, the word has been found
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1 - error occured or the word is not found
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2005-02-11 12:21:59 +01:00
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*/
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2005-01-25 11:54:56 +01:00
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int parse_output_and_get_value(const char *command, const char *word,
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2005-06-07 13:47:02 +02:00
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char *result, size_t input_buffer_len,
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uint flag)
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2005-01-25 11:54:56 +01:00
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{
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FILE *output;
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uint wordlen;
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2005-04-09 12:28:39 +02:00
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/* should be enough to store the string from the output */
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2005-02-11 12:21:59 +01:00
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enum { MAX_LINE_LEN= 512 };
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char linebuf[MAX_LINE_LEN];
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2005-08-29 21:29:35 +02:00
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int rc= 1;
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2005-01-25 11:54:56 +01:00
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wordlen= strlen(word);
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2005-08-29 21:29:35 +02:00
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/*
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Successful return of popen does not tell us whether the command has been
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executed successfully: if the command was not found, we'll get EOF
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when reading the output buffer below.
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*/
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2005-02-27 16:41:34 +01:00
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if (!(output= popen(command, "r")))
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2005-02-13 13:13:33 +01:00
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goto err;
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2005-01-25 11:54:56 +01:00
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/*
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We want fully buffered stream. We also want system to
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allocate appropriate buffer.
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*/
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setvbuf(output, NULL, _IOFBF, 0);
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2005-02-11 12:21:59 +01:00
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while (fgets(linebuf, sizeof(linebuf) - 1, output))
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{
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uint found_word_len= 0;
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2005-02-11 12:21:59 +01:00
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char *linep= linebuf;
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linebuf[sizeof(linebuf) - 1]= '\0'; /* safety */
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/*
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Get the word, which might contain non-alphanumeric characters. (Usually
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these are '/', '-' and '.' in the path expressions and filenames)
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*/
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2005-06-07 13:47:02 +02:00
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get_word((const char **) &linep, &found_word_len, NONSPACE);
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if (!strncmp(word, linep, wordlen))
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{
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/*
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2005-06-07 13:47:02 +02:00
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If we have found the word, return the next one (this is usually
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an option value) or the whole line (if flag)
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2005-02-11 12:21:59 +01:00
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*/
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2005-06-07 13:47:02 +02:00
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linep+= found_word_len; /* swallow the previous one */
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2005-06-07 15:57:20 +02:00
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if (flag & GET_VALUE)
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2005-06-01 02:40:22 +02:00
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{
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get_word((const char **) &linep, &found_word_len, NONSPACE);
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if (input_buffer_len <= found_word_len)
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2005-06-01 02:40:22 +02:00
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goto err;
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2005-06-07 13:47:02 +02:00
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strmake(result, linep, found_word_len);
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2005-06-01 02:40:22 +02:00
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}
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2005-06-07 13:47:02 +02:00
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else /* currently there are only two options */
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strmake(result, linep, input_buffer_len - 1);
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2005-08-29 21:29:35 +02:00
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rc= 0;
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break;
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2005-02-11 12:21:59 +01:00
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}
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2005-01-25 11:54:56 +01:00
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}
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2005-02-15 02:38:33 +01:00
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/* we are not interested in the termination status */
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pclose(output);
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2005-01-25 11:54:56 +01:00
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2005-02-13 13:13:33 +01:00
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err:
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2005-08-29 21:29:35 +02:00
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return rc;
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2005-01-25 11:54:56 +01:00
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}
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2005-04-09 12:28:39 +02:00
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