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mpv/options/parse_configfile.c
wm4 b85983a4a6 encode: don't apply default config options 
Often, user configs set options that are not suitable for encoding.
Usually, playback and encoding are pretty different things, so it makes
sense to keep them strictly separate. There are several possible
solutions. The approach taken by this commit is to basically ignore the
default config settings, and switch to an [encoding] config profile
section instead. This also makes it impossible to have --o in a config
file, because --o enables encode mode.

See github issue #727 for discussion.
2014-04-19 22:05:17 +02:00

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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 <ctype.h>
#include <assert.h>
#include "osdep/io.h"
#include "parse_configfile.h"
#include "common/msg.h"
#include "m_option.h"
#include "m_config.h"
/// Maximal include depth.
#define MAX_RECURSION_DEPTH 8
/// Current include depth.
static int recursion_depth = 0;
// 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", conffile);
if (recursion_depth > MAX_RECURSION_DEPTH) {
MP_ERR(config, ": too deep 'include'. check your configfiles\n");
ret = -1;
goto out;
}
if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
MP_FATAL(config, "\ncan't get memory for 'line': %s", strerror(errno));
ret = -1;
goto out;
} else
MP_VERBOSE(config, "\n");
if ((fp = fopen(conffile, "r")) == NULL) {
MP_VERBOSE(config, ": %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 whitespaces */
while (isspace(line[line_pos]))
++line_pos;
/* EOL / comment */
if (line[line_pos] == '\0' || line[line_pos] == '#')
continue;
/* read option. */
for (opt_pos = 0; 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, "too long option\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 (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 (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; isprint(line[line_pos])
&& !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 (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;
}
tmp = m_config_option_requires_param(config, bopt);
if (tmp > 0 && !param_set)
tmp = M_OPT_MISSING_PARAM;
if (tmp < 0) {
PRINT_LINENUM;
MP_ERR(config, "error parsing option %.*s=%.*s: %s\n",
BSTR_P(bopt), BSTR_P(bparam), m_option_strerror(tmp));
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);
--recursion_depth;
if (ret < 0) {
MP_FATAL(config, "Error loading config file %s.\n",
conffile);
}
return ret;
}
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