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102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
/* 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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#include <my_global.h>
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#include "parse.h"
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#include <stdio.h>
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#include <my_sys.h>
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#include <string.h>
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/*
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Parse output of the given command
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SYNOPSYS
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parse_output_and_get_value()
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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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result_len self-explanatory
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DESCRIPTION
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Parse output of the "command". Find the "word" and return the next one
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RETURN
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0 - ok
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1 - error occured
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*/
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int parse_output_and_get_value(const char *command, const char *word,
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char *result, size_t result_len)
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{
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FILE *output;
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uint wordlen;
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/* should be enought to store the string from the output */
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enum { MAX_LINE_LEN= 512 };
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char linebuf[MAX_LINE_LEN];
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wordlen= strlen(word);
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if (!(output= popen(command, "r")))
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goto err;
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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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while (fgets(linebuf, sizeof(linebuf) - 1, output))
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{
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uint lineword_len= 0;
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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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get_word((const char **) &linep, &lineword_len, NONSPACE);
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if (!strncmp(word, linep, wordlen))
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{
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/*
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If we have found the word, return the next one. This is usually
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an option value.
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*/
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linep+= lineword_len; /* swallow the previous one */
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get_word((const char **) &linep, &lineword_len, NONSPACE);
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if (result_len <= lineword_len)
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goto err;
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strncpy(result, linep, lineword_len);
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result[lineword_len]= '\0';
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goto pclose;
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}
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}
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pclose:
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/* we are not interested in the termination status */
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pclose(output);
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return 0;
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err:
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return 1;
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}
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