syscalls: fchmodat

src/sys/syscalls/chmodat.c

@@ -0,0 +1,71 @@
+#include <kernel/syscalls.h>
+#include <kernel/vfs.h>
+#include <sys/types.h>
+#include <arch/cls.h>
+#include <kernel/fd.h>
+#include <kernel/sched.h>
+
+// flags is ignored for now
+
+syscallret syscall_fchmodat(int dirfd, const char* path, mode_t mode, int flags){
+	syscallret retv;
+	retv.ret = -1;
+	
+	
+	if(path > USER_SPACE_END){
+		retv.errno = EFAULT;
+		return retv;
+	}
+	
+	size_t len = strlen(path);
+
+	char buff[len+1];
+
+	strcpy(buff, path);
+
+	proc_t* proc = arch_getcls()->thread->proc;
+
+	dirnode_t* target;
+	fd_t* fd;
+
+	if(dirfd != AT_FDCWD){
+		
+		int err = fd_access(&proc->fdtable, &fd, dirfd);
+
+		if(err){
+			retv.errno = err;
+			return retv;
+		}
+		
+		if(GETTYPE(fd->mode) != TYPE_DIR){
+			retv.errno = ENOTDIR;
+			goto _fail;
+		}
+
+		target = fd->node;
+	}
+	else
+		target = proc->cwd;
+
+
+	vnode_t* node;
+	
+	retv.errno = vfs_open(&node, buff[0] == '/' ? proc->root : target, buff);
+
+	if(retv.errno)
+		goto _fail;
+	
+	retv.errno = vfs_chmod(node, mode);
+
+	vfs_close(node);
+
+	_fail:
+
+	if(dirfd != AT_FDCWD)
+		fd_release(fd);
+
+	retv.ret = retv.errno ? -1 : 0;
+	
+	return retv;
+
+}

src/sys/syscalls/fstatat.c

@@ -6,8 +6,6 @@
 #include <arch/spinlock.h>
 #include <string.h>
 
-#define AT_FDCWD -100
-
 syscallret syscall_fstatat(int ifd, char* path, stat* st, int flags){
 	syscallret retv;
 	retv.ret = -1;
@@ -67,13 +65,13 @@ syscallret syscall_fstatat(int ifd, char* path, stat* st, int flags){
 
 	vfs_close(node);
 
+	retv.ret = 0;
+
 	_fail:
 	
 	if(ifd != AT_FDCWD)
 		fd_release(fd);
 
-	retv.ret = 0;
-
 	return retv;
 
 }