From edb6d397a4c6e66aff8227bdd0f7f42ff07203f9 Mon Sep 17 00:00:00 2001 From: Marius Vlad Date: Mon, 19 Sep 2022 22:57:13 +0300 Subject: process-util: Move Xwayland fork helpers to shared We'll want to reuse these inside desktop-shell as well as the Weston frontend. (Based on the work from https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/954) Bug-AGL: SPEC-4510 Signed-off-by: Daniel Stone Signed-off-by: Marius Vlad Change-Id: Ife13dce545928cf53e4f49a657b756ed88ee742f --- shared/process-util.h | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 shared/process-util.h (limited to 'shared/process-util.h') diff --git a/shared/process-util.h b/shared/process-util.h new file mode 100644 index 0000000..05543f6 --- /dev/null +++ b/shared/process-util.h @@ -0,0 +1,94 @@ +/* + * Copyright 2022 Collabora, Ltd. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include +#include +#include +#include + +#include + +#include "os-compatibility.h" +#include "string-helpers.h" + +/** + * A container for file descriptors and their string representations, designed + * to be used when forking child processes. + * + * fds[0] is generally used as the file descriptor held within the parent + * process to communicate with the child, and fds[1] as the child's counterpart. + * + * str1[] is used as a string representation of fds[1]. + */ +struct fdstr { + char str1[12]; + int fds[2]; +}; + +void +fdstr_update_str1(struct fdstr *s); + +void +fdstr_set_fd1(struct fdstr *s, int fd); + +bool +fdstr_clear_cloexec_fd1(struct fdstr *s); + +void +fdstr_close_all(struct fdstr *s); + + +/** + * A container for environment variables and/or process arguments, designed to + * be used when forking child processes, as setenv() and anything which + * allocates memory cannot be used between fork() and exec(). + */ +struct custom_env { + struct wl_array envp; + bool env_finalized; + struct wl_array argp; + bool arg_finalized; +}; + +void +custom_env_init_from_environ(struct custom_env *env); + +void +custom_env_fini(struct custom_env *env); + +void +custom_env_set_env_var(struct custom_env *env, const char *name, const char *value); + +void +custom_env_add_arg(struct custom_env *env, const char *arg); + +void +custom_env_add_from_exec_string(struct custom_env *env, const char *exec_str); + +char *const * +custom_env_get_envp(struct custom_env *env); + +char *const * +custom_env_get_argp(struct custom_env *env); -- cgit 1.2.3-korg