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58e0292a9f
mpv/options/parse_commandline.c
wm4 90496f3088 player: fix operation if command line is empty 
main() being called with argc==0 is probably possible. Fix by skipping
the program name early. (I already changed and reverted this once, but
this time we make sure that it's less likely to confuse the skipped argv
with main()'s argv by naming it "options".)
2015-03-06 11:31:05 +01:00

306 lines
9.4 KiB
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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <stdbool.h>
#include "osdep/io.h"
#include "common/global.h"
#include "common/msg.h"
#include "common/msg_control.h"
#include "m_option.h"
#include "m_config.h"
#include "options.h"
#include "common/playlist.h"
#include "parse_commandline.h"
#define GLOBAL 0
#define LOCAL 1
#define dvd_range(a) (a >= 0 && a < 255)
struct parse_state {
struct m_config *config;
char **argv;
bool no_more_opts;
bool error;
bool is_opt;
struct bstr arg;
struct bstr param;
};
// Returns 0 if a valid option/file is available, <0 on error, 1 on end of args.
static int split_opt_silent(struct parse_state *p)
{
assert(!p->error);
if (!p->argv || !p->argv[0])
return 1;
p->is_opt = false;
p->arg = bstr0(p->argv[0]);
p->param = bstr0(NULL);
p->argv++;
if (p->no_more_opts || !bstr_startswith0(p->arg, "-") || p->arg.len == 1)
return 0;
if (bstrcmp0(p->arg, "--") == 0) {
p->no_more_opts = true;
return split_opt_silent(p);
}
p->is_opt = true;
if (!bstr_eatstart0(&p->arg, "--"))
bstr_eatstart0(&p->arg, "-");
bool ambiguous = !bstr_split_tok(p->arg, "=", &p->arg, &p->param);
bool need_param = m_config_option_requires_param(p->config, p->arg) > 0;
if (ambiguous && need_param) {
if (!p->argv[0])
return M_OPT_MISSING_PARAM;
p->param = bstr0(p->argv[0]);
p->argv++;
}
return 0;
}
// Returns true if more args, false if all parsed or an error occurred.
static bool split_opt(struct parse_state *p)
{
int r = split_opt_silent(p);
if (r >= 0)
return r == 0;
p->error = true;
MP_FATAL(p->config, "Error parsing commandline option %.*s: %s\n",
BSTR_P(p->arg), m_option_strerror(r));
return false;
}
#ifdef __MINGW32__
static void process_non_option(struct playlist *files, const char *arg)
{
glob_t gg;
// Glob filenames on Windows (cmd.exe doesn't do this automatically)
if (glob(arg, 0, NULL, &gg)) {
playlist_add_file(files, arg);
} else {
for (int i = 0; i < gg.gl_pathc; i++)
playlist_add_file(files, gg.gl_pathv[i]);
globfree(&gg);
}
}
#else
static void process_non_option(struct playlist *files, const char *arg)
{
playlist_add_file(files, arg);
}
#endif
// returns M_OPT_... error code
int m_config_parse_mp_command_line(m_config_t *config, struct playlist *files,
struct mpv_global *global, char **argv)
{
int ret = M_OPT_UNKNOWN;
int mode = 0;
struct playlist_entry *local_start = NULL;
int local_params_count = 0;
struct playlist_param *local_params = 0;
assert(config != NULL);
mode = GLOBAL;
struct parse_state p = {config, argv};
while (split_opt(&p)) {
if (p.is_opt) {
int flags = M_SETOPT_FROM_CMDLINE;
if (mode == LOCAL)
flags |= M_SETOPT_BACKUP | M_SETOPT_CHECK_ONLY;
int r = m_config_set_option_ext(config, p.arg, p.param, flags);
if (r <= M_OPT_EXIT) {
ret = r;
goto err_out;
}
if (r < 0) {
MP_FATAL(config, "Setting commandline option --%.*s=%.*s failed.\n",
BSTR_P(p.arg), BSTR_P(p.param));
goto err_out;
}
// Handle some special arguments outside option parser.
if (!bstrcmp0(p.arg, "{")) {
if (mode != GLOBAL) {
MP_ERR(config, "'--{' can not be nested.\n");
goto err_out;
}
mode = LOCAL;
assert(!local_start);
local_start = files->last;
continue;
}
if (!bstrcmp0(p.arg, "}")) {
if (mode != LOCAL) {
MP_ERR(config, "Too many closing '--}'.\n");
goto err_out;
}
if (local_params_count) {
// The files added between '{' and '}' are the entries from
// the entry _after_ local_start, until the end of the list.
// If local_start is NULL, the list was empty on '{', and we
// want all files in the list.
struct playlist_entry *cur
= local_start ? local_start->next : files->first;
if (!cur)
MP_WARN(config, "Ignored options!\n");
while (cur) {
playlist_entry_add_params(cur, local_params,
local_params_count);
cur = cur->next;
}
}
local_params_count = 0;
mode = GLOBAL;
m_config_restore_backups(config);
local_start = NULL;
continue;
}
if (bstrcmp0(p.arg, "playlist") == 0) {
// append the playlist to the local args
char *param0 = bstrdup0(NULL, p.param);
struct playlist *pl = playlist_parse_file(param0, global);
talloc_free(param0);
if (!pl) {
MP_FATAL(config, "Error reading playlist '%.*s'\n",
BSTR_P(p.param));
goto err_out;
}
playlist_transfer_entries(files, pl);
talloc_free(pl);
continue;
}
if (mode == LOCAL) {
MP_TARRAY_APPEND(NULL, local_params, local_params_count,
(struct playlist_param) {p.arg, p.param});
}
} else {
// filename
void *tmp = talloc_new(NULL);
bstr file = p.arg;
char *file0 = bstrdup0(tmp, p.arg);
// expand DVD filename entries like dvd://1-3 into component titles
if (bstr_startswith0(file, "dvd://")) {
int offset = 6;
char *splitpos = strstr(file0 + offset, "-");
if (splitpos != NULL) {
char *endpos;
int start_title = strtol(file0 + offset, &endpos, 10);
int end_title;
//entries like dvd://-2 imply start at title 1
if (start_title < 0) {
end_title = abs(start_title);
start_title = 1;
} else
end_title = strtol(splitpos + 1, &endpos, 10);
if (dvd_range(start_title) && dvd_range(end_title)
&& (start_title < end_title)) {
for (int j = start_title; j <= end_title; j++) {
char *f = talloc_asprintf(tmp, "dvd://%d%s", j,
endpos);
playlist_add_file(files, f);
}
} else
MP_ERR(config, "Invalid play entry %s\n", file0);
} else // dvd:// or dvd://x entry
playlist_add_file(files, file0);
} else {
process_non_option(files, file0);
}
talloc_free(tmp);
}
}
if (p.error)
goto err_out;
if (mode != GLOBAL) {
MP_ERR(config, "Missing closing --} on command line.\n");
goto err_out;
}
ret = 0; // success
err_out:
talloc_free(local_params);
m_config_restore_backups(config);
return ret;
}
/* Parse some command line options early before main parsing.
* --no-config prevents reading configuration files (otherwise done before
* command line parsing), and --really-quiet suppresses messages printed
* during normal options parsing.
*/
void m_config_preparse_command_line(m_config_t *config, struct mpv_global *global,
char **argv)
{
struct MPOpts *opts = global->opts;
// Hack to shut up parser error messages
mp_msg_mute(global, true);
struct parse_state p = {config, argv};
while (split_opt_silent(&p) == 0) {
if (p.is_opt) {
// Ignore non-pre-parse options. They will be set later.
// Option parsing errors will be handled later as well.
int flags = M_SETOPT_FROM_CMDLINE | M_SETOPT_PRE_PARSE_ONLY;
m_config_set_option_ext(config, p.arg, p.param, flags);
if (bstrcmp0(p.arg, "v") == 0)
opts->verbose++;
}
}
mp_msg_mute(global, false);
for (int n = 0; n < config->num_opts; n++)
config->opts[n].warning_was_printed = false;
}
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