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-rw-r--r--options/path.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/options/path.c b/options/path.c
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+++ b/options/path.c
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+/*
+ * This file is part of mpv.
+ *
+ * Get path to config dir/file.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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 "mpv_talloc.h"
+#include "osdep/io.h"
+#include "osdep/path.h"
+#include "misc/ctype.h"
+
+// In order of decreasing priority: the first has highest priority.
+static const mp_get_platform_path_cb path_resolvers[] = {
+#if HAVE_COCOA
+ mp_get_platform_path_osx,
+#endif
+#if HAVE_DARWIN
+ mp_get_platform_path_darwin,
+#elif !defined(_WIN32) || defined(__CYGWIN__)
+ mp_get_platform_path_unix,
+#endif
+#if HAVE_UWP
+ mp_get_platform_path_uwp,
+#elif defined(_WIN32)
+ mp_get_platform_path_win,
+#endif
+};
+
+// from highest (most preferred) to lowest priority
+static const char *const config_dirs[] = {
+ "home",
+ "old_home",
+ "osxbundle",
+ "exe_dir",
+ "global",
+};
+
+// Return a platform specific path using a path type as defined in osdep/path.h.
+// Keep in mind that the only way to free the return value is freeing talloc_ctx
+// (or its children), as this function can return a statically allocated string.
+static const char *mp_get_platform_path(void *talloc_ctx,
+ struct mpv_global *global,
+ const char *type)
+{
+ assert(talloc_ctx);
+
+ if (global->configdir) {
+ // force all others to NULL, only first returns the path
+ for (int n = 0; n < MP_ARRAY_SIZE(config_dirs); n++) {
+ if (strcmp(config_dirs[n], type) == 0)
+ return (n == 0 && global->configdir[0]) ? global->configdir : NULL;
+ }
+ }
+
+ // Return the native config path if the platform doesn't support the
+ // type we are trying to fetch.
+ const char *fallback_type = NULL;
+ if (!strcmp(type, "cache") || !strcmp(type, "state"))
+ fallback_type = "home";
+
+ 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;
+ }
+
+ if (fallback_type) {
+ assert(strcmp(fallback_type, type) != 0);
+ return mp_get_platform_path(talloc_ctx, global, fallback_type);
+ }
+ return NULL;
+}
+
+void mp_init_paths(struct mpv_global *global, struct MPOpts *opts)
+{
+ TA_FREEP(&global->configdir);
+
+ const char *force_configdir = getenv("MPV_HOME");
+ if (opts->force_configdir && opts->force_configdir[0])
+ force_configdir = opts->force_configdir;
+ if (!opts->load_config)
+ force_configdir = "";
+
+ global->configdir = talloc_strdup(global, force_configdir);
+}
+
+char *mp_find_user_file(void *talloc_ctx, struct mpv_global *global,
+ const char *type, const char *filename)
+{
+ void *tmp = talloc_new(NULL);
+ char *res = (char *)mp_get_platform_path(tmp, global, type);
+ if (res)
+ res = mp_path_join(talloc_ctx, res, filename);
+ talloc_free(tmp);
+ MP_DBG(global, "%s path: '%s' -> '%s'\n", type, filename, res ? res : "-");
+ return res;
+}
+
+static char **mp_find_all_config_files_limited(void *talloc_ctx,
+ struct mpv_global *global,
+ int max_files,
+ const char *filename)
+{
+ char **ret = talloc_array(talloc_ctx, char*, 2); // 2 preallocated
+ int num_ret = 0;
+
+ for (int i = 0; i < MP_ARRAY_SIZE(config_dirs); i++) {
+ const char *dir = mp_get_platform_path(ret, global, config_dirs[i]);
+ bstr s = bstr0(filename);
+ while (dir && num_ret < max_files && s.len) {
+ bstr fn;
+ bstr_split_tok(s, "|", &fn, &s);
+
+ char *file = mp_path_join_bstr(ret, bstr0(dir), fn);
+ if (mp_path_exists(file)) {
+ MP_DBG(global, "config path: '%.*s' -> '%s'\n",
+ BSTR_P(fn), file);
+ MP_TARRAY_APPEND(NULL, ret, num_ret, file);
+ } else {
+ MP_DBG(global, "config path: '%.*s' -/-> '%s'\n",
+ BSTR_P(fn), file);
+ }
+ }
+ }
+
+ MP_TARRAY_GROW(NULL, ret, num_ret);
+ ret[num_ret] = NULL;
+
+ for (int n = 0; n < num_ret / 2; n++)
+ MPSWAP(char*, ret[n], ret[num_ret - n - 1]);
+ return ret;
+}
+
+char **mp_find_all_config_files(void *talloc_ctx, struct mpv_global *global,
+ const char *filename)
+{
+ return mp_find_all_config_files_limited(talloc_ctx, global, 64, filename);
+}
+
+char *mp_find_config_file(void *talloc_ctx, struct mpv_global *global,
+ const char *filename)
+{
+ char **l = mp_find_all_config_files_limited(talloc_ctx, global, 1, filename);
+ char *r = l && l[0] ? talloc_steal(talloc_ctx, l[0]) : NULL;
+ talloc_free(l);
+ return r;
+}
+
+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);
+ if (!res) {
+ void *tmp = talloc_new(NULL);
+ const char *p = mp_get_platform_path(tmp, global, "home");
+ res = mp_path_join_bstr(talloc_ctx, bstr0(p), rest);
+ talloc_free(tmp);
+ }
+ } else if (bstr_equals0(prefix, "")) {
+ char *home = getenv("HOME");
+ if (!home)
+ home = getenv("USERPROFILE");
+ res = mp_path_join_bstr(talloc_ctx, bstr0(home), rest);
+ } else if (bstr_eatstart0(&prefix, "~")) {
+ void *tmp = talloc_new(NULL);
+ char type[80];
+ snprintf(type, sizeof(type), "%.*s", BSTR_P(prefix));
+ const char *p = mp_get_platform_path(tmp, global, type);
+ res = mp_path_join_bstr(talloc_ctx, bstr0(p), rest);
+ talloc_free(tmp);
+ }
+ }
+ }
+ if (!res)
+ res = talloc_strdup(talloc_ctx, path);
+ MP_DBG(global, "user path: '%s' -> '%s'\n", path, res);
+ return res;
+}
+
+char *mp_basename(const char *path)
+{
+ char *s;
+
+#if HAVE_DOS_PATHS
+ if (!mp_is_url(bstr0(path))) {
+ 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;
+}
+
+
+#if HAVE_DOS_PATHS
+static const char mp_path_separators[] = "\\/";
+#else
+static const char mp_path_separators[] = "/";
+#endif
+
+// Mutates path and removes a trailing '/' (or '\' on Windows)
+void mp_path_strip_trailing_separator(char *path)
+{
+ size_t len = strlen(path);
+ if (len > 0 && strchr(mp_path_separators, path[len - 1]))
+ path[len - 1] = '\0';
+}
+
+char *mp_splitext(const char *path, bstr *root)
+{
+ assert(path);
+ int skip = (*path == '.'); // skip leading dot for "hidden" unix files
+ const char *split = strrchr(path + skip, '.');
+ if (!split || !split[1] || strchr(split, '/'))
+ return NULL;
+ if (root)
+ *root = (bstr){(char *)path, split - path};
+ return (char *)split + 1;
+}
+
+bool mp_path_is_absolute(struct bstr path)
+{
+ if (path.len && strchr(mp_path_separators, path.start[0]))
+ return true;
+
+#if HAVE_DOS_PATHS
+ // Note: "X:filename" is a path relative to the current working directory
+ // of drive X, and thus is not an absolute path. It needs to be
+ // followed by \ or /.
+ if (path.len >= 3 && path.start[1] == ':' &&
+ strchr(mp_path_separators, path.start[2]))
+ return true;
+#endif
+
+ return false;
+}
+
+char *mp_path_join_bstr(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 (mp_path_is_absolute(p2))
+ return bstrdup0(talloc_ctx, p2);
+
+ bool have_separator = strchr(mp_path_separators, p1.start[p1.len - 1]);
+#if HAVE_DOS_PATHS
+ // "X:" only => path relative to "X:" current working directory.
+ if (p1.len == 2 && p1.start[1] == ':')
+ have_separator = true;
+#endif
+
+ return talloc_asprintf(talloc_ctx, "%.*s%s%.*s", BSTR_P(p1),
+ have_separator ? "" : "/", BSTR_P(p2));
+}
+
+char *mp_path_join(void *talloc_ctx, const char *p1, const char *p2)
+{
+ return mp_path_join_bstr(talloc_ctx, bstr0(p1), bstr0(p2));
+}
+
+char *mp_getcwd(void *talloc_ctx)
+{
+ char *e_wd = getenv("PWD");
+ if (e_wd)
+ return talloc_strdup(talloc_ctx, e_wd);
+
+ 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;
+}
+
+char *mp_normalize_path(void *talloc_ctx, const char *path)
+{
+ if (mp_is_url(bstr0(path)))
+ return talloc_strdup(talloc_ctx, path);
+
+ return mp_path_join(talloc_ctx, mp_getcwd(talloc_ctx), path);
+}
+
+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;
+ // Per RFC3986, the first character of the protocol must be alphabetic.
+ // The rest must be alphanumeric plus -, + and .
+ for (int i = 0; i < proto; i++) {
+ unsigned char c = path.start[i];
+ if ((i == 0 && !mp_isalpha(c)) ||
+ (!mp_isalnum(c) && c != '.' && c != '-' && 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_user_dir(struct mpv_global *global, const char *type, char *subdir)
+{
+ char *dir = mp_find_user_file(NULL, global, type, subdir);
+ if (dir)
+ mp_mkdirp(dir);
+ talloc_free(dir);
+}
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