From 4d1a69043862ed979642f5688097160355d4cc81 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Mon, 11 Feb 2013 03:46:08 +0100 Subject: env: considerably beef up environment cleaning logic Now, actually check if the environment variable names and values used are valid, before accepting them. With this in place are at some places more rigid than POSIX, and less rigid at others. For example, this code allows lower-case environment variables (which POSIX suggests not to use), but it will not allow non-UTF8 variable values. All in all this should be a good middle ground of what to allow and what not to allow as environment variables. (This also splits out all environment related calls into env-util.[ch]) --- src/shared/env-util.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/shared/env-util.h (limited to 'src/shared/env-util.h') diff --git a/src/shared/env-util.h b/src/shared/env-util.h new file mode 100644 index 0000000000..93bf596ca8 --- /dev/null +++ b/src/shared/env-util.h @@ -0,0 +1,41 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#pragma once + +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include + +bool env_name_is_valid(const char *e); +bool env_value_is_valid(const char *e); +bool env_assignment_is_valid(const char *e); + +bool strv_env_is_valid(char **e); +char **strv_env_clean(char **l); + +char **strv_env_merge(unsigned n_lists, ...); +char **strv_env_delete(char **x, unsigned n_lists, ...); /* New copy */ + +char **strv_env_set(char **x, const char *p); /* New copy ... */ +char **strv_env_unset(char **l, const char *p); /* In place ... */ + +char *strv_env_get_n(char **l, const char *name, size_t k); +char *strv_env_get(char **x, const char *n); -- cgit v1.2.3-54-g00ecf