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/* file.c - Data file functions */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "extern/file.h"
#ifndef BIODATADIR
#define BIODATADIR "/usr/local/share/"PACKAGE
#endif
/* Locate data file */
char *file_locate(char *name) {
char *p, *q;
size_t l, len;
/* Check current directory */
if (access(name, F_OK) != -1) {
return name; }
p = NULL; l = strlen(name);
/* Check env directory */
if ((q = getenv("BIODATADIR")) != NULL) {
len = strlen(q) + 1 + l;
if ((p = realloc(p, len+1)) == NULL) {
return NULL; }
(void)sprintf(p, "%s/%s", q, name);
if (access(p, F_OK) != -1) {
return p; }
}
/* Check system directory */
len = strlen(BIODATADIR) + 1 + l;
if ((p = realloc(p, len+1)) == NULL) {
return NULL; }
(void)sprintf(p, "%s/%s", BIODATADIR, name);
if (access(p, F_OK) != -1) {
return p; }
return NULL; }
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