From ae581a19fbe896a797450b9d9573fb66f2735227 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:37:38 +0200 Subject: Adding upstream version 1.9.13p3. Signed-off-by: Daniel Baumann --- plugins/sudoers/sudoers_hooks.c | 155 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 plugins/sudoers/sudoers_hooks.c (limited to 'plugins/sudoers/sudoers_hooks.c') diff --git a/plugins/sudoers/sudoers_hooks.c b/plugins/sudoers/sudoers_hooks.c new file mode 100644 index 0000000..738f93b --- /dev/null +++ b/plugins/sudoers/sudoers_hooks.c @@ -0,0 +1,155 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2000-2005, 2007-2019 + * 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 + +#include +#include +#include +#include + +#include "sudoers.h" + +/* + * Similar to setenv(3) but operates on a private copy of the environment. + * Does not include warnings or debugging to avoid recursive calls. + */ +static int +sudo_setenv_nodebug(const char *var, const char *val, int overwrite) +{ + char *ep, *estring = NULL; + const char *cp; + size_t esize; + int ret = -1; + + if (var == NULL || *var == '\0') { + errno = EINVAL; + goto done; + } + + /* + * POSIX says a var name with '=' is an error but BSD + * just ignores the '=' and anything after it. + */ + for (cp = var; *cp && *cp != '='; cp++) + continue; + esize = (size_t)(cp - var) + 2; + if (val) { + esize += strlen(val); /* glibc treats a NULL val as "" */ + } + + /* Allocate and fill in estring. */ + if ((estring = ep = malloc(esize)) == NULL) + goto done; + for (cp = var; *cp && *cp != '='; cp++) + *ep++ = *cp; + *ep++ = '='; + if (val) { + for (cp = val; *cp; cp++) + *ep++ = *cp; + } + *ep = '\0'; + + ret = sudo_putenv_nodebug(estring, true, overwrite); +done: + if (ret == -1) + free(estring); + else + sudoers_gc_add(GC_PTR, estring); + return ret; +} + +int +sudoers_hook_getenv(const char *name, char **value, void *closure) +{ + static bool in_progress = false; /* avoid recursion */ + + if (in_progress || env_get() == NULL) + return SUDO_HOOK_RET_NEXT; + + in_progress = true; + + /* Hack to make GNU gettext() find the sudoers locale when needed. */ + if (*name == 'L' && sudoers_getlocale() == SUDOERS_LOCALE_SUDOERS) { + if (strcmp(name, "LANGUAGE") == 0 || strcmp(name, "LANG") == 0) { + *value = NULL; + goto done; + } + if (strcmp(name, "LC_ALL") == 0 || strcmp(name, "LC_MESSAGES") == 0) { + *value = (char *)def_sudoers_locale; + goto done; + } + } + + *value = sudo_getenv_nodebug(name); +done: + in_progress = false; + return SUDO_HOOK_RET_STOP; +} + +int +sudoers_hook_putenv(char *string, void *closure) +{ + static bool in_progress = false; /* avoid recursion */ + + if (in_progress || env_get() == NULL) + return SUDO_HOOK_RET_NEXT; + + in_progress = true; + sudo_putenv_nodebug(string, true, true); + in_progress = false; + return SUDO_HOOK_RET_STOP; +} + +int +sudoers_hook_setenv(const char *name, const char *value, int overwrite, void *closure) +{ + static bool in_progress = false; /* avoid recursion */ + + if (in_progress || env_get() == NULL) + return SUDO_HOOK_RET_NEXT; + + in_progress = true; + sudo_setenv_nodebug(name, value, overwrite); + in_progress = false; + return SUDO_HOOK_RET_STOP; +} + +int +sudoers_hook_unsetenv(const char *name, void *closure) +{ + static bool in_progress = false; /* avoid recursion */ + + if (in_progress || env_get() == NULL) + return SUDO_HOOK_RET_NEXT; + + in_progress = true; + sudo_unsetenv_nodebug(name); + in_progress = false; + return SUDO_HOOK_RET_STOP; +} -- cgit v1.2.3