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/*-
* Copyright (c) 2008, 2011 - 2013, 2016 Peter Pentchev
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <ctype.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "confget.h"
#include "confget_common.h"
#include "confget_ini.h"
static void readfile_ini(void);
confget_backend confget_ini_backend = {
"ini",
common_openfile,
readfile_ini,
common_closefile,
};
#define RF_SKIPSPACE while (*p != '\0' && isspace(*p)) p++;
#define RF_SKIPNONSPACE while (*p != '\0' && *p != '=' && !isspace(*p)) p++;
/***
* Function:
* readfile_ini - scan an INI file for the requested variable
* Inputs:
* None.
* Returns:
* Nothing; exits on error.
* Modifies:
* May write to standard output if the variable has been found.
* May write to standard error and terminate the program.
*/
static void
readfile_ini(void)
{
char *grp = NULL;
bool ingroup = false, incont = false, seenvars = false;
char *vname = NULL, *vvalue = NULL;
if (section == NULL || section[0] == '\0' || override)
ingroup = true;
size_t len = 0;
char *line = NULL;
while (confgetline(conffile, &line, &len) != NULL) {
char *p = line;
if (incont) {
if (vvalue == NULL)
errx(2, "INTERNAL ERROR: null vvalue incont");
size_t vlen = strlen(vvalue);
const size_t plen = strlen(p);
vvalue = realloc(vvalue, vlen + plen + 1);
if (vvalue == NULL)
err(1, "Out of memory for the variable value");
memcpy(vvalue + vlen, p, plen);
vvalue[vlen + plen] = '\0';
vlen += plen;
if (vlen > 0 && vvalue[vlen - 1] == '\\') {
vvalue[vlen - 1] = '\0';
continue;
}
incont = false;
while (vlen > 0 && isspace(vvalue[vlen - 1]))
vvalue[--vlen] = '\0';
if (ingroup) {
seenvars = true;
foundvar(grp, vname, vvalue);
free(vname);
free(vvalue);
vname = vvalue = NULL;
}
continue;
}
RF_SKIPSPACE;
/* Comment? */
if (*p == '#' || *p == ';' || *p == '\0')
continue;
/* Section? */
if (*p == '[') {
if (grp != NULL) {
free(grp);
grp = NULL;
}
p++;
RF_SKIPSPACE;
if (*p == '\0')
errx(1, "Invalid group line: %s", line);
const char * const start = p++;
char *end = p;
while (*p != '\0' && *p != ']') {
if (!isspace(*p))
end = p + 1;
p++;
}
if (*p != ']')
errx(1, "Invalid group line: %s", line);
p++;
RF_SKIPSPACE;
if (*p != '\0')
errx(1, "Invalid group line: %s", line);
*end = '\0';
if (section == NULL) {
if (seenvars && !qsections) {
free(line);
return;
}
section = strdup(start);
if (section == NULL)
errx(1, "Out of memory for the "
"group name");
}
grp = strdup(start);
if (grp == NULL)
err(1, "Out of memory for the group name");
foundsection(grp);
ingroup = strcmp(grp, section) == 0;
} else {
/* Variable! */
if (vname != NULL) {
free(vname);
vname = NULL;
}
if (vvalue != NULL) {
free(vvalue);
vvalue = NULL;
}
const char * const start = p++;
RF_SKIPNONSPACE;
if (*p == '\0')
errx(1, "No value on line: %s", line);
char *end = p;
RF_SKIPSPACE;
if (*p != '=')
errx(1, "No value on line: %s", line);
p++;
RF_SKIPSPACE;
*end = '\0';
vname = strdup(start);
if (vname == NULL)
err(1, "Out of memory for the variable name");
vvalue = strdup(p);
if (vvalue == NULL)
err(1, "Out of memory for the variable value");
size_t vlen = strlen(vvalue);
if (vlen > 0 && vvalue[vlen - 1] == '\\') {
vvalue[vlen - 1] = '\0';
incont = true;
continue;
}
while (vlen > 0 && isspace(vvalue[vlen - 1]))
vvalue[--vlen] = '\0';
if (ingroup) {
seenvars = true;
foundvar(grp, vname, vvalue);
free(vname);
free(vvalue);
vname = vvalue = NULL;
}
}
}
free(grp);
free(vname);
free(vvalue);
free(line);
if (!feof(conffile))
err(1, "Error reading input file %s", filename);
if (incont)
errx(1, "Invalid input file - continuation at the last line");
}
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