135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/* Copyright (C) 2019, 2020 C. McEnroe <june@causal.agency>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include "chat.h"
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FILE *configOpen(const char *path, const char *mode) {
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if (path[0] == '/' || path[0] == '.') goto local;
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const char *home = getenv("HOME");
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const char *configHome = getenv("XDG_CONFIG_HOME");
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const char *configDirs = getenv("XDG_CONFIG_DIRS");
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char buf[PATH_MAX];
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if (configHome) {
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snprintf(buf, sizeof(buf), "%s/" XDG_SUBDIR "/%s", configHome, path);
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} else {
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if (!home) goto local;
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snprintf(buf, sizeof(buf), "%s/.config/" XDG_SUBDIR "/%s", home, path);
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}
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FILE *file = fopen(buf, mode);
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if (file) return file;
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if (errno != ENOENT) {
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warn("%s", buf);
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return NULL;
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}
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if (!configDirs) configDirs = "/etc/xdg";
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while (*configDirs) {
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size_t len = strcspn(configDirs, ":");
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snprintf(
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buf, sizeof(buf), "%.*s/" XDG_SUBDIR "/%s",
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(int)len, configDirs, path
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);
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file = fopen(buf, mode);
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if (file) return file;
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if (errno != ENOENT) {
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warn("%s", buf);
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return NULL;
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}
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configDirs += len;
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if (*configDirs) configDirs++;
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}
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local:
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file = fopen(path, mode);
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if (!file) warn("%s", path);
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return file;
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}
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FILE *dataOpen(const char *path, const char *mode) {
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if (path[0] == '/' || path[0] == '.') goto local;
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const char *home = getenv("HOME");
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const char *dataHome = getenv("XDG_DATA_HOME");
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const char *dataDirs = getenv("XDG_DATA_DIRS");
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char homePath[PATH_MAX];
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if (dataHome) {
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snprintf(
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homePath, sizeof(homePath),
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"%s/" XDG_SUBDIR "/%s", dataHome, path
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);
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} else {
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if (!home) goto local;
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snprintf(
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homePath, sizeof(homePath),
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"%s/.local/share/" XDG_SUBDIR "/%s", home, path
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);
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}
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FILE *file = fopen(homePath, mode);
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if (file) return file;
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if (errno != ENOENT) {
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warn("%s", homePath);
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return NULL;
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}
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char buf[PATH_MAX];
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if (!dataDirs) dataDirs = "/usr/local/share:/usr/share";
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while (*dataDirs) {
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size_t len = strcspn(dataDirs, ":");
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snprintf(
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buf, sizeof(buf), "%.*s/" XDG_SUBDIR "/%s",
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(int)len, dataDirs, path
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);
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file = fopen(buf, mode);
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if (file) return file;
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if (errno != ENOENT) {
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warn("%s", buf);
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return NULL;
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}
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dataDirs += len;
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if (*dataDirs) dataDirs++;
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}
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if (mode[0] != 'r') {
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char *base = strrchr(homePath, '/');
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*base = '\0';
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int error = mkdir(homePath, S_IRWXU);
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if (error && errno != EEXIST) {
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warn("%s", homePath);
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return NULL;
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}
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*base = '/';
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file = fopen(homePath, mode);
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if (!file) warn("%s", homePath);
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return file;
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}
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local:
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file = fopen(path, mode);
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if (!file) warn("%s", path);
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return file;
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}
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