mirror of
https://gitlab.freedesktop.org/wayland/weston
synced 2024-09-06 18:05:39 +00:00
![Bryce Harrington](/assets/img/avatar_default.png)
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com> Reviewed-by: Yong Bakos <ybakos@humanoriented.com>
537 lines
11 KiB
C
537 lines
11 KiB
C
/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <string.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <ctype.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <wayland-util.h>
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#include "config-parser.h"
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#include "helpers.h"
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#include "string-helpers.h"
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struct weston_config_entry {
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char *key;
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char *value;
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struct wl_list link;
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};
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struct weston_config_section {
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char *name;
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struct wl_list entry_list;
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struct wl_list link;
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};
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struct weston_config {
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struct wl_list section_list;
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char path[PATH_MAX];
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};
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static int
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open_config_file(struct weston_config *c, const char *name)
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{
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const char *config_dir = getenv("XDG_CONFIG_HOME");
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const char *home_dir = getenv("HOME");
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const char *config_dirs = getenv("XDG_CONFIG_DIRS");
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const char *p, *next;
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int fd;
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if (name[0] == '/') {
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snprintf(c->path, sizeof c->path, "%s", name);
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return open(name, O_RDONLY | O_CLOEXEC);
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}
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/* Precedence is given to config files in the home directory,
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* and then to directories listed in XDG_CONFIG_DIRS and
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* finally to the current working directory. */
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/* $XDG_CONFIG_HOME */
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if (config_dir) {
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snprintf(c->path, sizeof c->path, "%s/%s", config_dir, name);
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fd = open(c->path, O_RDONLY | O_CLOEXEC);
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if (fd >= 0)
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return fd;
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}
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/* $HOME/.config */
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if (home_dir) {
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snprintf(c->path, sizeof c->path,
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"%s/.config/%s", home_dir, name);
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fd = open(c->path, O_RDONLY | O_CLOEXEC);
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if (fd >= 0)
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return fd;
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}
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/* For each $XDG_CONFIG_DIRS: weston/<config_file> */
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if (!config_dirs)
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config_dirs = "/etc/xdg"; /* See XDG base dir spec. */
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for (p = config_dirs; *p != '\0'; p = next) {
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next = strchrnul(p, ':');
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snprintf(c->path, sizeof c->path,
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"%.*s/weston/%s", (int)(next - p), p, name);
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fd = open(c->path, O_RDONLY | O_CLOEXEC);
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if (fd >= 0)
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return fd;
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if (*next == ':')
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next++;
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}
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/* Current working directory. */
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snprintf(c->path, sizeof c->path, "./%s", name);
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return open(c->path, O_RDONLY | O_CLOEXEC);
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}
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static struct weston_config_entry *
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config_section_get_entry(struct weston_config_section *section,
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const char *key)
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{
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struct weston_config_entry *e;
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if (section == NULL)
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return NULL;
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wl_list_for_each(e, §ion->entry_list, link)
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if (strcmp(e->key, key) == 0)
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return e;
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return NULL;
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}
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WL_EXPORT
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struct weston_config_section *
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weston_config_get_section(struct weston_config *config, const char *section,
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const char *key, const char *value)
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{
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struct weston_config_section *s;
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struct weston_config_entry *e;
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if (config == NULL)
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return NULL;
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wl_list_for_each(s, &config->section_list, link) {
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if (strcmp(s->name, section) != 0)
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continue;
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if (key == NULL)
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return s;
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e = config_section_get_entry(s, key);
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if (e && strcmp(e->value, value) == 0)
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return s;
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}
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return NULL;
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}
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WL_EXPORT
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int
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weston_config_section_get_int(struct weston_config_section *section,
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const char *key,
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int32_t *value, int32_t default_value)
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{
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struct weston_config_entry *entry;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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*value = default_value;
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errno = ENOENT;
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return -1;
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}
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if (!safe_strtoint(entry->value, value)) {
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*value = default_value;
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return -1;
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}
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return 0;
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}
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WL_EXPORT
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int
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weston_config_section_get_uint(struct weston_config_section *section,
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const char *key,
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uint32_t *value, uint32_t default_value)
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{
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long int ret;
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struct weston_config_entry *entry;
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char *end;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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*value = default_value;
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errno = ENOENT;
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return -1;
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}
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errno = 0;
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ret = strtol(entry->value, &end, 0);
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if (errno != 0 || end == entry->value || *end != '\0') {
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*value = default_value;
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errno = EINVAL;
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return -1;
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}
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/* check range */
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if (ret < 0 || ret > INT_MAX) {
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*value = default_value;
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errno = ERANGE;
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return -1;
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}
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*value = ret;
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return 0;
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}
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WL_EXPORT
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int
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weston_config_section_get_color(struct weston_config_section *section,
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const char *key,
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uint32_t *color, uint32_t default_color)
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{
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struct weston_config_entry *entry;
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int len;
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char *end;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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*color = default_color;
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errno = ENOENT;
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return -1;
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}
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len = strlen(entry->value);
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if (len == 1 && entry->value[0] == '0') {
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*color = 0;
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return 0;
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} else if (len != 8 && len != 10) {
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*color = default_color;
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errno = EINVAL;
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return -1;
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}
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errno = 0;
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*color = strtoul(entry->value, &end, 16);
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if (errno != 0 || end == entry->value || *end != '\0') {
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*color = default_color;
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errno = EINVAL;
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return -1;
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}
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return 0;
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}
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WL_EXPORT
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int
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weston_config_section_get_double(struct weston_config_section *section,
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const char *key,
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double *value, double default_value)
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{
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struct weston_config_entry *entry;
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char *end;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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*value = default_value;
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errno = ENOENT;
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return -1;
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}
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*value = strtod(entry->value, &end);
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if (*end != '\0') {
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*value = default_value;
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errno = EINVAL;
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return -1;
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}
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return 0;
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}
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WL_EXPORT
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int
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weston_config_section_get_string(struct weston_config_section *section,
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const char *key,
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char **value, const char *default_value)
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{
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struct weston_config_entry *entry;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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if (default_value)
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*value = strdup(default_value);
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else
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*value = NULL;
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errno = ENOENT;
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return -1;
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}
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*value = strdup(entry->value);
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return 0;
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}
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WL_EXPORT
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int
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weston_config_section_get_bool(struct weston_config_section *section,
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const char *key,
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int *value, int default_value)
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{
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struct weston_config_entry *entry;
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entry = config_section_get_entry(section, key);
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if (entry == NULL) {
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*value = default_value;
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errno = ENOENT;
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return -1;
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}
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if (strcmp(entry->value, "false") == 0)
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*value = 0;
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else if (strcmp(entry->value, "true") == 0)
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*value = 1;
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else {
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*value = default_value;
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errno = EINVAL;
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return -1;
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}
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return 0;
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}
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WL_EXPORT
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const char *
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weston_config_get_libexec_dir(void)
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{
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const char *path = getenv("WESTON_BUILD_DIR");
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if (path)
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return path;
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return LIBEXECDIR;
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}
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const char *
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weston_config_get_name_from_env(void)
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{
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const char *name;
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name = getenv(WESTON_CONFIG_FILE_ENV_VAR);
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if (name)
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return name;
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return "weston.ini";
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}
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static struct weston_config_section *
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config_add_section(struct weston_config *config, const char *name)
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{
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struct weston_config_section *section;
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section = malloc(sizeof *section);
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if (section == NULL)
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return NULL;
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section->name = strdup(name);
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if (section->name == NULL) {
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free(section);
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return NULL;
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}
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wl_list_init(§ion->entry_list);
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wl_list_insert(config->section_list.prev, §ion->link);
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return section;
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}
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static struct weston_config_entry *
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section_add_entry(struct weston_config_section *section,
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const char *key, const char *value)
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{
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struct weston_config_entry *entry;
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entry = malloc(sizeof *entry);
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if (entry == NULL)
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return NULL;
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entry->key = strdup(key);
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if (entry->key == NULL) {
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free(entry);
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return NULL;
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}
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entry->value = strdup(value);
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if (entry->value == NULL) {
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free(entry->key);
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free(entry);
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return NULL;
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}
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wl_list_insert(section->entry_list.prev, &entry->link);
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return entry;
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}
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struct weston_config *
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weston_config_parse(const char *name)
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{
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FILE *fp;
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char line[512], *p;
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struct stat filestat;
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struct weston_config *config;
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struct weston_config_section *section = NULL;
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int i, fd;
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config = malloc(sizeof *config);
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if (config == NULL)
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return NULL;
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wl_list_init(&config->section_list);
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fd = open_config_file(config, name);
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if (fd == -1) {
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free(config);
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return NULL;
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}
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if (fstat(fd, &filestat) < 0 ||
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!S_ISREG(filestat.st_mode)) {
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close(fd);
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free(config);
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return NULL;
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}
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fp = fdopen(fd, "r");
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if (fp == NULL) {
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free(config);
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return NULL;
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}
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while (fgets(line, sizeof line, fp)) {
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switch (line[0]) {
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case '#':
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case '\n':
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continue;
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case '[':
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p = strchr(&line[1], ']');
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if (!p || p[1] != '\n') {
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fprintf(stderr, "malformed "
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"section header: %s\n", line);
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fclose(fp);
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weston_config_destroy(config);
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return NULL;
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}
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p[0] = '\0';
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section = config_add_section(config, &line[1]);
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continue;
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default:
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p = strchr(line, '=');
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if (!p || p == line || !section) {
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fprintf(stderr, "malformed "
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"config line: %s\n", line);
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fclose(fp);
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weston_config_destroy(config);
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return NULL;
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}
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p[0] = '\0';
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p++;
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while (isspace(*p))
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p++;
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i = strlen(p);
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while (i > 0 && isspace(p[i - 1])) {
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p[i - 1] = '\0';
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i--;
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}
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section_add_entry(section, line, p);
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continue;
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}
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}
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fclose(fp);
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return config;
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}
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const char *
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weston_config_get_full_path(struct weston_config *config)
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{
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return config == NULL ? NULL : config->path;
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}
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int
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weston_config_next_section(struct weston_config *config,
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struct weston_config_section **section,
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const char **name)
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{
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if (config == NULL)
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return 0;
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if (*section == NULL)
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*section = container_of(config->section_list.next,
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struct weston_config_section, link);
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else
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*section = container_of((*section)->link.next,
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struct weston_config_section, link);
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if (&(*section)->link == &config->section_list)
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return 0;
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*name = (*section)->name;
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return 1;
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}
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void
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weston_config_destroy(struct weston_config *config)
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{
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struct weston_config_section *s, *next_s;
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struct weston_config_entry *e, *next_e;
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if (config == NULL)
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return;
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wl_list_for_each_safe(s, next_s, &config->section_list, link) {
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wl_list_for_each_safe(e, next_e, &s->entry_list, link) {
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free(e->key);
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free(e->value);
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free(e);
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}
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free(s->name);
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free(s);
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}
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free(config);
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}
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