mirror of
https://github.com/nunuhara/xsystem4.git
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101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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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 2 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 <http://gnu.org/licenses/>.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "system4.h"
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void *file_read(const char *path, size_t *len_out)
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{
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FILE *fp;
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long len;
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uint8_t *buf;
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if (!(fp = fopen(path, "rb")))
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return NULL;
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fseek(fp, 0, SEEK_END);
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len = ftell(fp);
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fseek(fp, 0, SEEK_SET);
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buf = xmalloc(len + 1);
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if (fread(buf, len, 1, fp) != 1) {
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free(buf);
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return NULL;
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}
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if (fclose(fp)) {
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free(buf);
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return NULL;
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}
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if (len_out)
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*len_out = len;
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buf[len] = 0;
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return buf;
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}
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bool file_exists(const char *path)
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{
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return access(path, F_OK) != -1;
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}
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// Adapted from http://stackoverflow.com/a/2336245/119527
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int mkdir_p(const char *path)
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{
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const size_t len = strlen(path);
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char _path[PATH_MAX];
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char *p;
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errno = 0;
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// Copy string so its mutable
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if (len > sizeof(_path)-1) {
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errno = ENAMETOOLONG;
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return -1;
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}
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strcpy(_path, path);
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// Iterate the string
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for (p = _path + 1; *p; p++) {
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if (*p == '/') {
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// Temporarily truncate
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*p = '\0';
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if (mkdir(_path, S_IRWXU) != 0) {
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if (errno != EEXIST)
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return -1;
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}
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*p = '/';
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}
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}
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if (mkdir(_path, S_IRWXU) != 0) {
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if (errno != EEXIST)
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return -1;
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}
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return 0;
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}
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