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-rw-r--r--usr.sbin/efivar/efivar.c349
1 files changed, 349 insertions, 0 deletions
diff --git a/usr.sbin/efivar/efivar.c b/usr.sbin/efivar/efivar.c
new file mode 100644
index 000000000000..87b135b50989
--- /dev/null
+++ b/usr.sbin/efivar/efivar.c
@@ -0,0 +1,349 @@
+/*-
+ * Copyright (c) 2016 Netflix, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <efivar.h>
+#include <err.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/* options descriptor */
+static struct option longopts[] = {
+ { "append", no_argument, NULL, 'a' },
+ { "ascii", no_argument, NULL, 'A' },
+ { "attributes", required_argument, NULL, 't' },
+ { "binary", no_argument, NULL, 'b' },
+ { "delete", no_argument, NULL, 'D' },
+ { "fromfile", required_argument, NULL, 'f' },
+ { "hex", no_argument, NULL, 'H' },
+ { "list-guids", no_argument, NULL, 'L' },
+ { "list", no_argument, NULL, 'l' },
+ { "name", required_argument, NULL, 'n' },
+ { "no-name", no_argument, NULL, 'N' },
+ { "print", no_argument, NULL, 'p' },
+ { "print-decimal", no_argument, NULL, 'd' },
+ { "raw-guid", no_argument, NULL, 'R' },
+ { "write", no_argument, NULL, 'w' },
+ { NULL, 0, NULL, 0 }
+};
+
+
+static int aflag, Aflag, bflag, dflag, Dflag, Hflag, Nflag,
+ lflag, Lflag, Rflag, wflag, pflag;
+static char *varname;
+static u_long attrib = 0x7;
+
+static void
+usage(void)
+{
+
+ errx(1, "efivar [-abdDHlLNpRtw] [-n name] [-f file] [--append] [--ascii]\n"
+ "\t[--attributes] [--binary] [--delete] [--fromfile file] [--hex]\n"
+ "\t[--list-guids] [--list] [--name name] [--no-name] [--print]\n"
+ "\t[--print-decimal] [--raw-guid] [--write] name[=value]");
+}
+
+static void
+breakdown_name(char *name, efi_guid_t *guid, char **vname)
+{
+ char *cp;
+
+ cp = strrchr(name, '-');
+ if (cp == NULL)
+ errx(1, "Invalid name: %s", name);
+ *vname = cp + 1;
+ *cp = '\0';
+ if (efi_str_to_guid(name, guid) < 0)
+ errx(1, "Invalid guid %s", name);
+}
+
+static uint8_t *
+get_value(char *val, size_t *datalen)
+{
+ static char buffer[16*1024];
+
+ if (val != NULL) {
+ *datalen = strlen(val);
+ return ((uint8_t *)val);
+ }
+ /* Read from stdin */
+ *datalen = sizeof(buffer);
+ *datalen = read(0, buffer, *datalen);
+ return ((uint8_t *)buffer);
+}
+
+static void
+append_variable(char *name, char *val)
+{
+ char *vname;
+ efi_guid_t guid;
+ size_t datalen;
+ uint8_t *data;
+
+ breakdown_name(name, &guid, &vname);
+ data = get_value(val, &datalen);
+ if (efi_append_variable(guid, vname, data, datalen, attrib) < 0)
+ err(1, "efi_append_variable");
+}
+
+static void
+delete_variable(char *name)
+{
+ char *vname;
+ efi_guid_t guid;
+
+ breakdown_name(name, &guid, &vname);
+ if (efi_del_variable(guid, vname) < 0)
+ err(1, "efi_del_variable");
+}
+
+static void
+write_variable(char *name, char *val)
+{
+ char *vname;
+ efi_guid_t guid;
+ size_t datalen;
+ uint8_t *data;
+
+ breakdown_name(name, &guid, &vname);
+ data = get_value(val, &datalen);
+ if (efi_set_variable(guid, vname, data, datalen, attrib, 0) < 0)
+ err(1, "efi_set_variable");
+}
+
+static void
+asciidump(uint8_t *data, size_t datalen)
+{
+ size_t i;
+ int len;
+
+ len = 0;
+ if (!Nflag)
+ printf("\n");
+ for (i = 0; i < datalen; i++) {
+ if (isprint(data[i])) {
+ len++;
+ if (len > 80) {
+ len = 0;
+ printf("\n");
+ }
+ printf("%c", data[i]);
+ } else {
+ len +=3;
+ if (len > 80) {
+ len = 0;
+ printf("\n");
+ }
+ printf("%%%02x", data[i]);
+ }
+ }
+ printf("\n");
+}
+
+static void
+hexdump(uint8_t *data, size_t datalen)
+{
+ size_t i;
+
+ if (!Nflag)
+ printf("\n");
+ for (i = 0; i < datalen; i++) {
+ if (i % 16 == 0) {
+ if (i != 0)
+ printf("\n");
+ printf("%04x: ", (int)i);
+ }
+ printf("%02x ", data[i]);
+ }
+ printf("\n");
+}
+
+static void
+bindump(uint8_t *data, size_t datalen)
+{
+ write(1, data, datalen);
+}
+
+static void
+print_var(efi_guid_t *guid, char *name)
+{
+ uint32_t att;
+ uint8_t *data;
+ size_t datalen;
+ char *gname;
+ int rv;
+
+ efi_guid_to_str(guid, &gname);
+ if (!Nflag)
+ printf("%s-%s", gname, name);
+ if (pflag) {
+ rv = efi_get_variable(*guid, name, &data, &datalen, &att);
+
+ if (rv < 0)
+ printf("\n --- Error getting value --- %d", errno);
+ else {
+ if (Aflag)
+ asciidump(data, datalen);
+ else if (bflag)
+ bindump(data, datalen);
+ else
+ hexdump(data, datalen);
+ }
+ }
+ free(gname);
+ if (!Nflag)
+ printf("\n");
+}
+
+static void
+print_variable(char *name)
+{
+ char *vname;
+ efi_guid_t guid;
+
+ breakdown_name(name, &guid, &vname);
+ print_var(&guid, vname);
+}
+
+static void
+print_variables(void)
+{
+ int rv;
+ char *name = NULL;
+ efi_guid_t *guid = NULL;
+
+ while ((rv = efi_get_next_variable_name(&guid, &name)) > 0)
+ print_var(guid, name);
+
+ if (rv < 0)
+ err(1, "Error listing names");
+}
+
+static void
+parse_args(int argc, char **argv)
+{
+ int ch, i;
+
+ while ((ch = getopt_long(argc, argv, "aAbdDf:HlLNn:pRt:w",
+ longopts, NULL)) != -1) {
+ switch (ch) {
+ case 'a':
+ aflag++;
+ break;
+ case 'A':
+ Aflag++;
+ break;
+ case 'b':
+ bflag++;
+ break;
+ case 'd':
+ dflag++;
+ break;
+ case 'D':
+ Dflag++;
+ break;
+ case 'H':
+ Hflag++;
+ break;
+ case 'l':
+ lflag++;
+ break;
+ case 'L':
+ Lflag++;
+ break;
+ case 'n':
+ varname = optarg;
+ break;
+ case 'N':
+ Nflag++;
+ break;
+ case 'p':
+ pflag++;
+ break;
+ case 'R':
+ Rflag++;
+ break;
+ case 'w':
+ wflag++;
+ break;
+ case 'f':
+ case 't':
+ case 0:
+ errx(1, "unknown or unimplemented option\n");
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 1)
+ varname = argv[0];
+
+ if (aflag + Dflag + wflag > 1) {
+ warnx("Can only use one of -a (--append), "
+ "-D (--delete) and -w (--write)");
+ usage();
+ }
+
+ if (aflag + Dflag + wflag > 0 && varname == NULL) {
+ warnx("Must specify a variable for -a (--append), "
+ "-D (--delete) or -w (--write)");
+ usage();
+ }
+
+ if (aflag)
+ append_variable(varname, NULL);
+ else if (Dflag)
+ delete_variable(varname);
+ else if (wflag)
+ write_variable(varname, NULL);
+ else if (varname) {
+ pflag++;
+ print_variable(varname);
+ } else if (argc > 0) {
+ pflag++;
+ for (i = 0; i < argc; i++)
+ print_variable(argv[i]);
+ } else
+ print_variables();
+}
+
+int
+main(int argc, char **argv)
+{
+
+ parse_args(argc, argv);
+}