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/* Copyright (c) 2019, Anthony Latorre <tlatorre at uchicago>
*
* 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/>.
*/
#include "util.h"
#include <unistd.h> /* for access() */
#include <stdlib.h> /* for getenv() */
#include <stdio.h> /* for sprintf(), fopen() */
/* Equivalent to fopen() but uses find_file() to find the path to the filename. */
FILE *open_file(const char *filename, const char *mode)
{
char *path;
path = find_file(filename);
if (!path) return NULL;
return fopen(path,mode);
}
/* Returns the full path to `filename` by searching the current working
* directory and the path specified by the environment variable SDDM_DATA.
*
* Returns a pointer to the full path on success or NULL if the file isn't
* found. */
char *find_file(const char *filename)
{
static char path[256];
char *dir;
/* First check in the current working directory. */
sprintf(path, "%s", filename);
if (access(path, F_OK) == 0) return path;
/* Now check in the directory specified by the environment variable
* SDDM_DATA. */
dir = getenv("SDDM_DATA");
if (dir) {
sprintf(path, "%s/%s", dir,filename);
if (access(path, F_OK) == 0) return path;
}
return NULL;
}
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