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mpv/options/parse_configfile.c

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/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "osdep/io.h"
#include "parse_configfile.h"
#include "common/msg.h"
#include "misc/ctype.h"
#include "m_option.h"
#include "m_config.h"
/// Maximal include depth.
#define MAX_RECURSION_DEPTH 8
// Load options and profiles from from a config file.
// conffile: path to the config file
// initial_section: default section where to add normal options
// flags: M_SETOPT_* bits
// returns: 1 on sucess, -1 on error, 0 if file not accessible.
int m_config_parse_config_file(m_config_t *config, const char *conffile,
char *initial_section, int flags)
{
#define PRINT_LINENUM MP_ERR(config, "%s:%d: ", conffile, line_num)
#define MAX_LINE_LEN 10000
#define MAX_OPT_LEN 1000
#define MAX_PARAM_LEN 1500
FILE *fp = NULL;
char *line = NULL;
char opt[MAX_OPT_LEN + 1];
char param[MAX_PARAM_LEN + 1];
char c; /* for the "" and '' check */
int tmp;
int line_num = 0;
int line_pos; /* line pos */
int opt_pos; /* opt pos */
int param_pos; /* param pos */
int ret = 1;
int errors = 0;
m_profile_t *profile = m_config_add_profile(config, initial_section);
flags = flags | M_SETOPT_FROM_CONFIG_FILE;
MP_VERBOSE(config, "Reading config file %s\n", conffile);
if (config->recursion_depth > MAX_RECURSION_DEPTH) {
MP_ERR(config, "Maximum 'include' nesting depth exceeded.\n");
ret = -1;
goto out;
}
if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
ret = -1;
goto out;
} else
MP_VERBOSE(config, "\n");
if ((fp = fopen(conffile, "r")) == NULL) {
MP_VERBOSE(config, "Can't open config file: %s\n", strerror(errno));
ret = 0;
goto out;
}
while (fgets(line, MAX_LINE_LEN, fp)) {
if (errors >= 16) {
MP_FATAL(config, "too many errors\n");
goto out;
}
line_num++;
line_pos = 0;
/* skip BOM */
if (strncmp(line, "\xEF\xBB\xBF", 3) == 0)
line_pos += 3;
/* skip whitespaces */
while (mp_isspace(line[line_pos]))
++line_pos;
/* EOL / comment */
if (line[line_pos] == '\0' || line[line_pos] == '#')
continue;
/* read option. */
for (opt_pos = 0; mp_isprint(line[line_pos]) &&
line[line_pos] != ' ' &&
line[line_pos] != '#' &&
line[line_pos] != '='; /* NOTHING */) {
opt[opt_pos++] = line[line_pos++];
if (opt_pos >= MAX_OPT_LEN) {
PRINT_LINENUM;
MP_ERR(config, "option name too long\n");
errors++;
ret = -1;
goto nextline;
}
}
if (opt_pos == 0) {
PRINT_LINENUM;
MP_ERR(config, "parse error\n");
ret = -1;
errors++;
continue;
}
opt[opt_pos] = '\0';
/* Profile declaration */
if (opt_pos > 2 && opt[0] == '[' && opt[opt_pos - 1] == ']') {
opt[opt_pos - 1] = '\0';
profile = m_config_add_profile(config, opt + 1);
continue;
}
/* skip whitespaces */
while (mp_isspace(line[line_pos]))
++line_pos;
param_pos = 0;
bool param_set = false;
/* check '=' */
if (line[line_pos] == '=') {
line_pos++;
param_set = true;
/* whitespaces... */
while (mp_isspace(line[line_pos]))
++line_pos;
/* read the parameter */
if (line[line_pos] == '"' || line[line_pos] == '\'') {
c = line[line_pos];
++line_pos;
for (param_pos = 0; line[line_pos] != c; /* NOTHING */) {
param[param_pos++] = line[line_pos++];
if (param_pos >= MAX_PARAM_LEN) {
PRINT_LINENUM;
MP_ERR(config, "option %s has a too long parameter\n", opt);
ret = -1;
errors++;
goto nextline;
}
}
line_pos++; /* skip the closing " or ' */
goto param_done;
}
if (line[line_pos] == '%') {
char *start = &line[line_pos + 1];
char *end = start;
unsigned long len = strtoul(start, &end, 10);
if (start != end && end[0] == '%') {
if (len >= MAX_PARAM_LEN - 1 ||
strlen(end + 1) < len)
{
PRINT_LINENUM;
MP_ERR(config, "bogus %% length\n");
ret = -1;
errors++;
goto nextline;
}
param_pos = snprintf(param, sizeof(param), "%.*s",
(int)len, end + 1);
line_pos += 1 + (end - start) + 1 + len;
goto param_done;
}
}
for (param_pos = 0; mp_isprint(line[line_pos])
&& !mp_isspace(line[line_pos])
&& line[line_pos] != '#'; /* NOTHING */) {
param[param_pos++] = line[line_pos++];
if (param_pos >= MAX_PARAM_LEN) {
PRINT_LINENUM;
MP_ERR(config, "too long parameter\n");
ret = -1;
errors++;
goto nextline;
}
}
param_done:
while (mp_isspace(line[line_pos]))
++line_pos;
}
param[param_pos] = '\0';
/* EOL / comment */
if (line[line_pos] != '\0' && line[line_pos] != '#') {
PRINT_LINENUM;
MP_ERR(config, "extra characters: %s\n", line + line_pos);
ret = -1;
}
bstr bopt = bstr0(opt);
bstr bparam = bstr0(param);
if (bopt.len >= 3)
bstr_eatstart0(&bopt, "--");
if (profile && bstr_equals0(bopt, "profile-desc")) {
m_profile_set_desc(profile, bparam);
goto nextline;
}
bool need_param = m_config_option_requires_param(config, bopt) > 0;
if (need_param && !param_set) {
PRINT_LINENUM;
MP_ERR(config, "error parsing option %.*s=%.*s: %s\n",
BSTR_P(bopt), BSTR_P(bparam),
m_option_strerror(M_OPT_MISSING_PARAM));
continue;
}
if (profile) {
tmp = m_config_set_profile_option(config, profile, bopt, bparam);
} else {
tmp = m_config_set_option_ext(config, bopt, bparam, flags);
}
if (tmp < 0) {
PRINT_LINENUM;
MP_ERR(config, "setting option %.*s='%.*s' failed.\n",
BSTR_P(bopt), BSTR_P(bparam));
continue;
/* break */
}
nextline:
;
}
out:
free(line);
if (fp)
fclose(fp);
config->recursion_depth -= 1;
if (ret < 0) {
MP_FATAL(config, "Error loading config file %s.\n",
conffile);
}
return ret;
}
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