/* vi: set sw=4 ts=4: */ /* * Utility routines. * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <stdio.h> #include <unistd.h> #include "libbb.h" /* * Read all of the supplied buffer from a file. * This does multiple reads as necessary. * Returns the amount read, or -1 on an error. * A short read is returned on an end of file. */ ssize_t bb_full_read(int fd, void *buf, size_t len) { ssize_t cc; ssize_t total; total = 0; while (len > 0) { cc = safe_read(fd, buf, len); if (cc < 0) return cc; /* read() returns -1 on failure. */ if (cc == 0) break; buf = ((char *)buf) + cc; total += cc; len -= cc; } return total; } /* END CODE */ /* Local Variables: c-file-style: "linux" c-basic-offset: 4 tab-width: 4 End: */