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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <unistd.h>
#include "env-util.h"
#include "errno-util.h"
#include "initrd-util.h"
#include "parse-util.h"
#include "stat-util.h"
#include "string-util.h"
static int saved_in_initrd = -1;
bool in_initrd(void) {
int r;
if (saved_in_initrd >= 0)
return saved_in_initrd;
/* If /etc/initrd-release exists, we're in an initrd.
* This can be overridden by setting SYSTEMD_IN_INITRD=0|1.
*/
r = getenv_bool_secure("SYSTEMD_IN_INITRD");
if (r < 0 && r != -ENXIO)
log_debug_errno(r, "Failed to parse $SYSTEMD_IN_INITRD, ignoring: %m");
if (r >= 0)
saved_in_initrd = r > 0;
else {
r = RET_NERRNO(access("/etc/initrd-release", F_OK));
if (r < 0 && r != -ENOENT)
log_debug_errno(r, "Failed to check if /etc/initrd-release exists, assuming it does not: %m");
saved_in_initrd = r >= 0;
}
return saved_in_initrd;
}
void in_initrd_force(bool value) {
saved_in_initrd = value;
}
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