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/* Copyright (C) 2019, 2020 C. McEnroe <june@causal.agency>
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with LibreSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of LibreSSL used as well as that of the
* covered work.
*/
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "chat.h"
#define SUBDIR "catgirl"
FILE *configOpen(const char *path, const char *mode) {
if (path[0] == '/' || path[0] == '.') goto local;
const char *home = getenv("HOME");
const char *configHome = getenv("XDG_CONFIG_HOME");
const char *configDirs = getenv("XDG_CONFIG_DIRS");
char buf[PATH_MAX];
if (configHome) {
snprintf(buf, sizeof(buf), "%s/" SUBDIR "/%s", configHome, path);
} else {
if (!home) goto local;
snprintf(buf, sizeof(buf), "%s/.config/" SUBDIR "/%s", home, path);
}
FILE *file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) warn("%s", buf);
if (!configDirs) configDirs = "/etc/xdg";
while (*configDirs) {
size_t len = strcspn(configDirs, ":");
snprintf(
buf, sizeof(buf), "%.*s/" SUBDIR "/%s",
(int)len, configDirs, path
);
file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) warn("%s", buf);
configDirs += len;
if (*configDirs) configDirs++;
}
local:
file = fopen(path, mode);
if (!file) warn("%s", path);
return file;
}
FILE *dataOpen(const char *path, const char *mode) {
if (path[0] == '/' || path[0] == '.') goto local;
const char *home = getenv("HOME");
const char *dataHome = getenv("XDG_DATA_HOME");
const char *dataDirs = getenv("XDG_DATA_DIRS");
char homePath[PATH_MAX];
if (dataHome) {
snprintf(
homePath, sizeof(homePath),
"%s/" SUBDIR "/%s", dataHome, path
);
} else {
if (!home) goto local;
snprintf(
homePath, sizeof(homePath),
"%s/.local/share/" SUBDIR "/%s", home, path
);
}
FILE *file = fopen(homePath, mode);
if (file) return file;
if (errno != ENOENT) warn("%s", homePath);
char buf[PATH_MAX];
if (!dataDirs) dataDirs = "/usr/local/share:/usr/share";
while (*dataDirs) {
size_t len = strcspn(dataDirs, ":");
snprintf(
buf, sizeof(buf), "%.*s/" SUBDIR "/%s",
(int)len, dataDirs, path
);
file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) warn("%s", buf);
dataDirs += len;
if (*dataDirs) dataDirs++;
}
if (mode[0] != 'r') {
char *base = strrchr(homePath, '/');
*base = '\0';
int error = mkdir(homePath, S_IRWXU);
if (error && errno != EEXIST) {
warn("%s", homePath);
return NULL;
}
*base = '/';
file = fopen(homePath, mode);
if (!file) warn("%s", homePath);
return file;
}
local:
file = fopen(path, mode);
if (!file) warn("%s", path);
return file;
}
void dataMkdir(const char *path) {
const char *home = getenv("HOME");
const char *dataHome = getenv("XDG_DATA_HOME");
char homePath[PATH_MAX];
if (dataHome) {
snprintf(
homePath, sizeof(homePath),
"%s/" SUBDIR "/%s", dataHome, path
);
} else {
if (!home) return;
snprintf(
homePath, sizeof(homePath),
"%s/.local/share/" SUBDIR "/%s", home, path
);
}
int error = mkdir(homePath, S_IRWXU);
if (error && errno != EEXIST) warn("%s", homePath);
}
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