Merge branch 'master' of github.com:jtsiomb/pcboot

[bootcensus] / src / libc / unistd.c

diff --git a/src/libc/unistd.c b/src/libc/unistd.c
new file mode 100644 (file)
index 0000000..1fc0542
--- /dev/null
+++ b/src/libc/unistd.c
@@ -0,0 +1,61 @@
+/*
+pcboot - bootable PC demo/game kernel
+Copyright (C) 2018-2019  John Tsiombikas <nuclear@member.fsf.org>
+
+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 <string.h>
+#include <errno.h>
+#include "unistd.h"
+#include "fs.h"
+
+int chdir(const char *path)
+{
+       return fs_chdir(path);
+}
+
+char *getcwd(char *buf, int sz)
+{
+       char *cwd = fs_getcwd();
+       int len = strlen(cwd);
+       if(len + 1 > sz) {
+               errno = ERANGE;
+               return 0;
+       }
+       memcpy(buf, cwd, len + 1);
+       return buf;
+}
+
+int mkdir(const char *path, int mode)
+{
+       struct fs_node *fsn;
+
+       if(!(fsn = fs_open(path, FSO_CREATE | FSO_DIR | FSO_EXCL))) {
+               return -1;
+       }
+       fs_close(fsn);
+       return 0;
+}
+
+int rmdir(const char *path)
+{
+       struct fs_node *fsn;
+
+       if(!(fsn = fs_open(path, FSO_DIR))) {
+               return -1;
+       }
+       fs_remove(fsn);
+       fs_close(fsn);
+       return 0;
+}