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diff --git a/usr.sbin/efibootmgr/efibootmgr.8 b/usr.sbin/efibootmgr/efibootmgr.8
--- a/usr.sbin/efibootmgr/efibootmgr.8
+++ b/usr.sbin/efibootmgr/efibootmgr.8
@@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd April 3, 2022
+.Dd February 15, 2023
.Dt EFIBOOTMGR 8
.Os
.Sh NAME
@@ -69,6 +69,7 @@
.Fl t Ar timeout
.Nm
.Fl T
+.Nm Fl u Ar unix-path
.Sh "DESCRIPTION"
The
.Nm
@@ -174,6 +175,9 @@
Delete the
.Cm BootTimeout
variable.
+.It Fl u -efidev Ar unix-path
+Displays the UEFI device path of
+.Ar unix-path .
.It Fl v -verbose
Display the device path of boot entries in the output.
.El
diff --git a/usr.sbin/efibootmgr/efibootmgr.c b/usr.sbin/efibootmgr/efibootmgr.c
--- a/usr.sbin/efibootmgr/efibootmgr.c
+++ b/usr.sbin/efibootmgr/efibootmgr.c
@@ -70,6 +70,7 @@
#define EFI_OS_INDICATIONS_BOOT_TO_FW_UI 0x0000000000000001
typedef struct _bmgr_opts {
+ char *dev;
char *env;
char *loader;
char *label;
@@ -85,6 +86,7 @@
bool dry_run;
bool device_path;
bool esp_device;
+ bool find_dev;
bool fw_ui;
bool no_fw_ui;
bool has_bootnum;
@@ -114,6 +116,7 @@
{"dry-run", no_argument, NULL, 'D'},
{"env", required_argument, NULL, 'e'},
{"esp", no_argument, NULL, 'E'},
+ {"efidev", required_argument, NULL, 'u'},
{"fw-ui", no_argument, NULL, 'f'},
{"no-fw-ui", no_argument, NULL, 'F'},
{"help", no_argument, NULL, 'h'},
@@ -284,6 +287,9 @@
opts.set_timeout = true;
opts.timeout = strtoul(optarg, NULL, 10);
break;
+ case 'u':
+ opts.find_dev = true;
+ opts.dev = strdup(optarg);
case 'v':
opts.verbose = true;
break;
@@ -996,7 +1002,7 @@
char *name, *dev, *relpath, *abspath;
uint8_t *walker, *ep;
efi_char *descr;
- efidp dp, edp;
+ efidp dp;
char buf[PATH_MAX];
if (do_dp && do_unix)
@@ -1026,7 +1032,6 @@
// Now we have fplen bytes worth of file path stuff
dp = (efidp)walker;
walker += fplen;
- edp = (efidp)walker;
if (walker > ep)
errx(1, "malformed boot variable %s", name);
if (do_dp) {
@@ -1068,6 +1073,26 @@
errx(1, "failed to set boot to fw ui");
}
+static void
+find_efi_device(const char *path)
+{
+ efidp dp = NULL;
+ size_t len;
+ int ret;
+ char buf[1024];
+
+ ret = efivar_unix_path_to_device_path(path, &dp);
+ if (ret != 0)
+ errc(1, ret,
+ "Cannot translate path '%s' to UEFI", path);
+ len = efidp_size(dp);
+ if (len > MAX_DP_LEN)
+ errx(1, "Resulting device path too long.");
+ efidp_format_device_path(buf, sizeof(buf), dp, len);
+ printf("%s -> %s\n", path, buf);
+ exit (0);
+}
+
int
main(int argc, char *argv[])
{
@@ -1075,7 +1100,10 @@
memset(&opts, 0, sizeof (bmgr_opts_t));
parse_args(argc, argv);
- if (!efi_variables_supported())
+ /*
+ * find_dev can operate without any efi variables
+ */
+ if (!efi_variables_supported() && !opts.find_dev)
errx(1, "efi variables not supported on this system. root? kldload efirt?");
read_vars();
@@ -1107,6 +1135,8 @@
set_boot_to_fw_ui(true);
else if (opts.no_fw_ui)
set_boot_to_fw_ui(false);
+ else if (opts.find_dev)
+ find_efi_device(opts.dev);
print_boot_vars(opts.verbose);
}

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