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mpv/options/path.c

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/*
* Get path to config dir/file.
*
* Return Values:
* Returns the pointer to the ALLOCATED buffer containing the
* zero terminated path string. This buffer has to be FREED
* by the caller.
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include "config.h"
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "options/options.h"
#include "options/path.h"
#include "talloc.h"
#include "osdep/io.h"
#include "osdep/path.h"
#define MAX_CONFIG_PATHS 32
static const char *mp_get_forced_home(void *talloc_ctx, const char *type)
{
return strcmp(type, "home") == 0 ? getenv("MPV_HOME") : NULL;
}
// In order of increasing priority: the first hiz has highest priority.
static const mp_get_platform_path_cb path_resolvers[] = {
mp_get_forced_home,
#if HAVE_COCOA
mp_get_platform_path_osx,
#endif
#if !defined(_WIN32) || defined(__CYGWIN__)
mp_get_platform_path_unix,
#endif
#if defined(_WIN32)
mp_get_platform_path_win,
#endif
};
static const char *mp_get_platform_path(void *talloc_ctx, const char *type)
{
for (int n = 0; n < MP_ARRAY_SIZE(path_resolvers); n++) {
const char *path = path_resolvers[n](talloc_ctx, type);
if (path && path[0])
return path;
}
return NULL;
}
// Return NULL-terminated array of config directories, from highest to lowest
// priority
static char **mp_config_dirs(void *talloc_ctx, struct mpv_global *global)
{
struct MPOpts *opts = global->opts;
char **ret = talloc_zero_array(talloc_ctx, char*, MAX_CONFIG_PATHS + 1);
int num_ret = 0;
if (!opts->load_config)
return ret;
if (opts->force_configdir && opts->force_configdir[0]) {
ret[0] = talloc_strdup(ret, opts->force_configdir);
return ret;
}
// from highest (most preferred) to lowest priority
static const char *const configdirs[] = {
"home",
"old_home",
"osxbundle",
"global",
};
for (int n = 0; n < MP_ARRAY_SIZE(configdirs); n++) {
const char *path = mp_get_platform_path(ret, configdirs[n]);
if (path && path[0] && num_ret < MAX_CONFIG_PATHS)
ret[num_ret++] = (char *)path;
}
MP_VERBOSE(global, "search dirs:");
for (int n = 0; n < num_ret; n++)
MP_VERBOSE(global, " %s", ret[n]);
MP_VERBOSE(global, "\n");
return ret;
}
char *mp_find_config_file(void *talloc_ctx, struct mpv_global *global,
const char *filename)
{
char *res = NULL;
char **dirs = mp_config_dirs(NULL, global);
for (int i = 0; dirs && dirs[i]; i++) {
char *file = talloc_asprintf(talloc_ctx, "%s/%s", dirs[i], filename);
if (mp_path_exists(file)) {
res = file;
break;
}
talloc_free(file);
}
talloc_free(dirs);
MP_VERBOSE(global, "config path: '%s' -> '%s'\n", filename,
res ? res : "(NULL)");
return res;
}
char **mp_find_all_config_files(void *talloc_ctx, struct mpv_global *global,
const char *filename)
{
char **ret = talloc_zero_array(talloc_ctx, char*, MAX_CONFIG_PATHS + 1);
int num_ret = 0;
char **dirs = mp_config_dirs(NULL, global);
for (int i = 0; dirs && dirs[i]; i++) {
bstr s = bstr0(filename);
while (s.len) {
bstr fn;
bstr_split_tok(s, "|", &fn, &s);
char *file = talloc_asprintf(ret, "%s/%.*s", dirs[i], BSTR_P(fn));
if (mp_path_exists(file) && num_ret < MAX_CONFIG_PATHS)
ret[num_ret++] = file;
}
}
talloc_free(dirs);
for (int n = 0; n < num_ret / 2; n++)
MPSWAP(char*, ret[n], ret[num_ret - n - 1]);
MP_VERBOSE(global, "config file: '%s'\n", filename);
for (char** c = ret; *c; c++)
MP_VERBOSE(global, " -> '%s'\n", *c);
return ret;
}
char *mp_get_user_path(void *talloc_ctx, struct mpv_global *global,
const char *path)
{
if (!path)
return NULL;
char *res = NULL;
bstr bpath = bstr0(path);
if (bstr_eatstart0(&bpath, "~")) {
// parse to "~" <prefix> "/" <rest>
bstr prefix, rest;
if (bstr_split_tok(bpath, "/", &prefix, &rest)) {
const char *rest0 = rest.start; // ok in this case
if (bstr_equals0(prefix, "~")) {
res = mp_find_config_file(talloc_ctx, global, rest0);
} else if (bstr_equals0(prefix, "")) {
res = mp_path_join(talloc_ctx, bstr0(getenv("HOME")), rest);
} else {
char type[80];
snprintf(type, sizeof(type), "%.*s", BSTR_P(prefix));
res = talloc_strdup(talloc_ctx,
mp_get_platform_path(talloc_ctx, type));
}
}
}
if (!res)
res = talloc_strdup(talloc_ctx, path);
MP_VERBOSE(global, "user path: '%s' -> '%s'\n", path, res);
return res;
}
char *mp_basename(const char *path)
{
char *s;
#if HAVE_DOS_PATHS
s = strrchr(path, '\\');
if (s)
path = s + 1;
s = strrchr(path, ':');
if (s)
path = s + 1;
#endif
s = strrchr(path, '/');
return s ? s + 1 : (char *)path;
}
struct bstr mp_dirname(const char *path)
{
struct bstr ret = {
(uint8_t *)path, mp_basename(path) - path
};
if (ret.len == 0)
return bstr0(".");
return ret;
}
char *mp_splitext(const char *path, bstr *root)
{
assert(path);
const char *split = strrchr(path, '.');
if (!split || !split[1] || strchr(split, '/'))
return NULL;
if (root)
*root = (bstr){(char *)path, split - path};
return (char *)split + 1;
}
char *mp_path_join(void *talloc_ctx, struct bstr p1, struct bstr p2)
{
if (p1.len == 0)
return bstrdup0(talloc_ctx, p2);
if (p2.len == 0)
return bstrdup0(talloc_ctx, p1);
#if HAVE_DOS_PATHS
if ((p2.len >= 2 && p2.start[1] == ':')
|| p2.start[0] == '\\' || p2.start[0] == '/')
#else
if (p2.start[0] == '/')
#endif
return bstrdup0(talloc_ctx, p2); // absolute path
bool have_separator;
int endchar1 = p1.start[p1.len - 1];
#if HAVE_DOS_PATHS
have_separator = endchar1 == '/' || endchar1 == '\\'
|| (p1.len == 2 && endchar1 == ':'); // "X:" only
#else
have_separator = endchar1 == '/';
#endif
return talloc_asprintf(talloc_ctx, "%.*s%s%.*s", BSTR_P(p1),
have_separator ? "" : "/", BSTR_P(p2));
}
char *mp_getcwd(void *talloc_ctx)
{
char *wd = talloc_array(talloc_ctx, char, 20);
while (getcwd(wd, talloc_get_size(wd)) == NULL) {
if (errno != ERANGE) {
talloc_free(wd);
return NULL;
}
wd = talloc_realloc(talloc_ctx, wd, char, talloc_get_size(wd) * 2);
}
return wd;
}
bool mp_path_exists(const char *path)
{
struct stat st;
return path && stat(path, &st) == 0;
}
bool mp_path_isdir(const char *path)
{
struct stat st;
return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
}
// Return false if it's considered a normal local filesystem path.
bool mp_is_url(bstr path)
{
int proto = bstr_find0(path, "://");
if (proto < 1)
return false;
// The protocol part must be alphanumeric, otherwise it's not an URL.
for (int i = 0; i < proto; i++) {
unsigned char c = path.start[i];
if (!(c >= 'a' && c <= 'z') && !(c >= 'A' && c <= 'Z') &&
!(c >= '0' && c <= '9') && c != '_')
return false;
}
return true;
}
// Return the protocol part of path, e.g. "http" if path is "http://...".
// On success, out_url (if not NULL) is set to the part after the "://".
bstr mp_split_proto(bstr path, bstr *out_url)
{
if (!mp_is_url(path))
return (bstr){0};
bstr r;
bstr_split_tok(path, "://", &r, out_url ? out_url : &(bstr){0});
return r;
}
void mp_mkdirp(const char *dir)
{
char *path = talloc_strdup(NULL, dir);
char *cdir = path + 1;
while (cdir) {
cdir = strchr(cdir, '/');
if (cdir)
*cdir = 0;
mkdir(path, 0700);
if (cdir)
*cdir++ = '/';
}
talloc_free(path);
}
void mp_mk_config_dir(struct mpv_global *global, char *subdir)
{
void *tmp = talloc_new(NULL);
char *dir = mp_config_dirs(tmp, global)[0];
if (dir) {
dir = talloc_asprintf(tmp, "%s/%s", dir, subdir);
mp_mkdirp(dir);
}
talloc_free(tmp);
}
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