/* * SPDX-License-Identifier: ISC * SPDX-FileCopyrightText: Copyright Todd C. Miller * SPDX-FileCopyrightText: Copyright TF-RMM Contributors. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */ #include #include /* * Copy string src to buffer dst of size dsize. At most dsize-1 * chars will be copied. Always NUL terminates (unless dsize == 0). * Returns strlen(src); if retval >= dsize, truncation occurred. */ size_t strlcpy(char *dst, const char *src, size_t dsize) { const char *osrc = src; size_t nleft = dsize; /* Copy as many bytes as will fit. */ if (nleft != 0UL) { while (--nleft != 0UL) { *dst++ = *src++; if (*(dst - 1) == '\0') { break; } } } /* Not enough room in dst, add NUL and traverse rest of src. */ if (nleft == 0UL) { if (dsize != 0UL) { *dst = '\0'; /* NUL-terminate dst */ } while (*src++) { ; } } return (src - osrc - 1); /* count does not include NUL */ }