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sd-path: modernize from_user_dir()

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Deduplicate logic through sd_path_lookup() and from_home_dir().
Besides, rename to from_xdg_user_dir() to indicate
it's a XDG thing.
This commit is contained in:
Mike Yuan 2024-08-23 17:53:18 +02:00
parent dbf5b09de4
commit 8664dd3c1f
No known key found for this signature in database
GPG Key ID: 417471C0A40F58B3
1 changed files with 30 additions and 66 deletions
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96
src/libsystemd/sd-path/sd-path.c
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@ -65,26 +65,20 @@ static int from_home_dir(const char *envname, const char *suffix, char **buffer,
return 0;
}
static int from_user_dir(const char *field, char **buffer, const char **ret) {
static int from_xdg_user_dir(const char *field, char **buffer, const char **ret) {
_cleanup_free_ char *user_dirs = NULL;
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *b = NULL;
_cleanup_free_ const char *fn = NULL;
const char *c = NULL;
int r;
assert(field);
assert(buffer);
assert(ret);
r = from_home_dir("XDG_CONFIG_HOME", ".config", &b, &c);
r = sd_path_lookup(SD_PATH_USER_CONFIGURATION, "user-dirs.dirs", &user_dirs);
if (r < 0)
return r;
fn = path_join(c, "user-dirs.dirs");
if (!fn)
return -ENOMEM;
f = fopen(fn, "re");
f = fopen(user_dirs, "re");
if (!f) {
if (errno == ENOENT)
goto fallback;
@ -107,14 +101,12 @@ static int from_user_dir(const char *field, char **buffer, const char **ret) {
if (!p)
continue;
p += strspn(p, WHITESPACE);
p = skip_leading_chars(p, WHITESPACE);
if (*p != '=')
continue;
p++;
p += strspn(p, WHITESPACE);
p = skip_leading_chars(p, WHITESPACE);
if (*p != '"')
continue;
p++;
@ -125,62 +117,34 @@ static int from_user_dir(const char *field, char **buffer, const char **ret) {
*e = 0;
/* Three syntaxes permitted: relative to $HOME, $HOME itself, and absolute path */
if (startswith(p, "$HOME/")) {
_cleanup_free_ char *h = NULL;
if (streq(p, "$HOME"))
goto home;
r = get_home_dir(&h);
if (r < 0)
return r;
const char *s = startswith(p, "$HOME/");
if (s)
return from_home_dir(/* envname = */ NULL, s, buffer, ret);
if (!path_extend(&h, p+5))
if (path_is_absolute(p)) {
char *c = strdup(p);
if (!c)
return -ENOMEM;
*buffer = h;
*ret = TAKE_PTR(h);
return 0;
} else if (streq(p, "$HOME")) {
r = get_home_dir(buffer);
if (r < 0)
return r;
*ret = *buffer;
return 0;
} else if (path_is_absolute(p)) {
char *copy;
copy = strdup(p);
if (!copy)
return -ENOMEM;
*buffer = copy;
*ret = copy;
*ret = *buffer = c;
return 0;
}
}
fallback:
/* The desktop directory defaults to $HOME/Desktop, the others to $HOME */
if (streq(field, "XDG_DESKTOP_DIR")) {
_cleanup_free_ char *h = NULL;
if (streq(field, "XDG_DESKTOP_DIR"))
return from_home_dir(/* envname = */ NULL, "Desktop", buffer, ret);
r = get_home_dir(&h);
if (r < 0)
return r;
if (!path_extend(&h, "Desktop"))
return -ENOMEM;
*buffer = h;
*ret = TAKE_PTR(h);
} else {
r = get_home_dir(buffer);
if (r < 0)
return r;
*ret = *buffer;
}
home:
r = get_home_dir(buffer);
if (r < 0)
return r;
*ret = *buffer;
return 0;
}
@ -287,28 +251,28 @@ static int get_path(uint64_t type, char **buffer, const char **ret) {
return 0;
case SD_PATH_USER_DOCUMENTS:
return from_user_dir("XDG_DOCUMENTS_DIR", buffer, ret);
return from_xdg_user_dir("XDG_DOCUMENTS_DIR", buffer, ret);
case SD_PATH_USER_MUSIC:
return from_user_dir("XDG_MUSIC_DIR", buffer, ret);
return from_xdg_user_dir("XDG_MUSIC_DIR", buffer, ret);
case SD_PATH_USER_PICTURES:
return from_user_dir("XDG_PICTURES_DIR", buffer, ret);
return from_xdg_user_dir("XDG_PICTURES_DIR", buffer, ret);
case SD_PATH_USER_VIDEOS:
return from_user_dir("XDG_VIDEOS_DIR", buffer, ret);
return from_xdg_user_dir("XDG_VIDEOS_DIR", buffer, ret);
case SD_PATH_USER_DOWNLOAD:
return from_user_dir("XDG_DOWNLOAD_DIR", buffer, ret);
return from_xdg_user_dir("XDG_DOWNLOAD_DIR", buffer, ret);
case SD_PATH_USER_PUBLIC:
return from_user_dir("XDG_PUBLICSHARE_DIR", buffer, ret);
return from_xdg_user_dir("XDG_PUBLICSHARE_DIR", buffer, ret);
case SD_PATH_USER_TEMPLATES:
return from_user_dir("XDG_TEMPLATES_DIR", buffer, ret);
return from_xdg_user_dir("XDG_TEMPLATES_DIR", buffer, ret);
case SD_PATH_USER_DESKTOP:
return from_user_dir("XDG_DESKTOP_DIR", buffer, ret);
return from_xdg_user_dir("XDG_DESKTOP_DIR", buffer, ret);
case SD_PATH_SYSTEMD_UTIL:
*ret = PREFIX_NOSLASH "/lib/systemd";