From 9620f76a210d9d8c1aaff25e99d6dc513f87e6e9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 04:23:56 +0200 Subject: Adding upstream version 1.8.27. Signed-off-by: Daniel Baumann --- lib/util/pw_dup.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 lib/util/pw_dup.c (limited to 'lib/util/pw_dup.c') diff --git a/lib/util/pw_dup.c b/lib/util/pw_dup.c new file mode 100644 index 0000000..4257adf --- /dev/null +++ b/lib/util/pw_dup.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2000, 2002, 2012-2014 + * Todd C. Miller + * + * 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. + * + * Sponsored in part by the Defense Advanced Research Projects + * Agency (DARPA) and Air Force Research Laboratory, Air Force + * Materiel Command, USAF, under agreement number F39502-99-1-0512. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include + +#ifndef HAVE_PW_DUP + +#include + +#include +#include +#ifdef HAVE_STRING_H +# include +#endif /* HAVE_STRING_H */ +#ifdef HAVE_STRINGS_H +# include +#endif /* HAVE_STRINGS_H */ +#include + +#include "sudo_compat.h" + +#define PW_SIZE(name, size) \ +do { \ + if (pw->name) { \ + size = strlen(pw->name) + 1; \ + total += size; \ + } \ +} while (0) + +#define PW_COPY(name, size) \ +do { \ + if (pw->name) { \ + (void)memcpy(cp, pw->name, size); \ + newpw->name = cp; \ + cp += size; \ + } \ +} while (0) + +struct passwd * +sudo_pw_dup(const struct passwd *pw) +{ + size_t nsize = 0, psize = 0, gsize = 0, dsize = 0, ssize = 0, total; +#ifdef HAVE_LOGIN_CAP_H + size_t csize = 0; +#endif + struct passwd *newpw; + char *cp; + + /* Allocate in one big chunk for easy freeing */ + total = sizeof(struct passwd); + PW_SIZE(pw_name, nsize); + PW_SIZE(pw_passwd, psize); +#ifdef HAVE_LOGIN_CAP_H + PW_SIZE(pw_class, csize); +#endif + PW_SIZE(pw_gecos, gsize); + PW_SIZE(pw_dir, dsize); + PW_SIZE(pw_shell, ssize); + + if ((cp = malloc(total)) == NULL) + return NULL; + newpw = (struct passwd *)cp; + + /* + * Copy in passwd contents and make strings relative to space + * at the end of the buffer. + */ + (void)memcpy(newpw, pw, sizeof(struct passwd)); + cp += sizeof(struct passwd); + + PW_COPY(pw_name, nsize); + PW_COPY(pw_passwd, psize); +#ifdef HAVE_LOGIN_CAP_H + PW_COPY(pw_class, csize); +#endif + PW_COPY(pw_gecos, gsize); + PW_COPY(pw_dir, dsize); + PW_COPY(pw_shell, ssize); + + return newpw; +} +#endif /* HAVE_PW_DUP */ -- cgit v1.2.3