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process-util: Move Xwayland fork helpers to shared

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We'll want to reuse these inside desktop-shell as well as the Weston
frontend.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone
2022-07-12 13:15:23 +01:00
committed by Pekka Paalanen
parent 7fd22ae44d
commit b685e075cd
4 changed files with 236 additions and 121 deletions
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compositor/xwayland.c
+1 -121
View File
@@ -37,6 +37,7 @@
#include <libweston/xwayland-api.h>
#include "shared/helpers.h"
#include "shared/os-compatibility.h"
#include "shared/process-util.h"
#include "shared/string-helpers.h"
#ifdef HAVE_XWAYLAND_LISTENFD
@@ -90,127 +91,6 @@ out:
return 0;
}
struct fdstr {
char str1[12];
int fds[2];
};
static void
fdstr_update_str1(struct fdstr *s)
{
snprintf(s->str1, sizeof(s->str1), "%d", s->fds[1]);
}
static void
fdstr_set_fd1(struct fdstr *s, int fd)
{
s->fds[0] = -1;
s->fds[1] = fd;
fdstr_update_str1(s);
}
static bool
fdstr_clear_cloexec_fd1(struct fdstr *s)
{
return os_fd_clear_cloexec(s->fds[1]) >= 0;
}
static void
fdstr_close_all(struct fdstr *s)
{
unsigned i;
for (i = 0; i < ARRAY_LENGTH(s->fds); i++) {
close(s->fds[i]);
s->fds[i] = -1;
}
}
struct custom_env {
struct wl_array p;
bool finalized;
};
static void
custom_env_init_from_environ(struct custom_env *env)
{
char **it;
char **ep;
wl_array_init(&env->p);
env->finalized = false;
for (it = environ; *it; it++) {
ep = wl_array_add(&env->p, sizeof *ep);
assert(ep);
*ep = strdup(*it);
assert(*ep);
}
}
static void
custom_env_fini(struct custom_env *env)
{
char **ep;
wl_array_for_each(ep, &env->p)
free(*ep);
wl_array_release(&env->p);
}
static char **
custom_env_find_element(struct custom_env *env, const char *name)
{
char **ep;
size_t name_len = strlen(name);
wl_array_for_each(ep, &env->p) {
char *entry = *ep;
if (strncmp(entry, name, name_len) == 0 &&
entry[name_len] == '=') {
return ep;
}
}
return NULL;
}
static void
custom_env_set(struct custom_env *env, const char *name, const char *value)
{
char **ep;
assert(strchr(name, '=') == NULL);
assert(!env->finalized);
ep = custom_env_find_element(env, name);
if (ep)
free(*ep);
else
ep = wl_array_add(&env->p, sizeof *ep);
assert(ep);
str_printf(ep, "%s=%s", name, value);
assert(*ep);
}
static char *const *
custom_env_get_envp(struct custom_env *env)
{
char **ep;
/* add terminating NULL */
ep = wl_array_add(&env->p, sizeof *ep);
assert(ep);
*ep = NULL;
env->finalized = true;
return env->p.data;
}
static pid_t
spawn_xserver(void *user_data, const char *display, int abstract_fd, int unix_fd)
{