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-rw-r--r--usr.sbin/nvram/Makefile5
-rw-r--r--usr.sbin/nvram/nvram.8110
-rw-r--r--usr.sbin/nvram/nvram.c224
3 files changed, 339 insertions, 0 deletions
diff --git a/usr.sbin/nvram/Makefile b/usr.sbin/nvram/Makefile
new file mode 100644
index 000000000000..7d27790ed132
--- /dev/null
+++ b/usr.sbin/nvram/Makefile
@@ -0,0 +1,5 @@
+PROG= nvram
+MAN= nvram.8
+MANSUBDIR= /powerpc
+
+.include <bsd.prog.mk>
diff --git a/usr.sbin/nvram/nvram.8 b/usr.sbin/nvram/nvram.8
new file mode 100644
index 000000000000..f0b63cdbc731
--- /dev/null
+++ b/usr.sbin/nvram/nvram.8
@@ -0,0 +1,110 @@
+.\"-
+.\" Copyright (c) 2006 Maxim Sobolev <sobomax@FreeBSD.org>
+.\" 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 THE AUTHOR ``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 THE AUTHOR 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.
+.\"
+.Dd June 19, 2020
+.Dt NVRAM 8 powerpc
+.Os
+.Sh NAME
+.Nm nvram
+.Nd "display or modify contents of the EEPROM or NVRAM"
+.Sh SYNOPSIS
+.Nm
+.Fl p
+.Nm
+.Oo Fl d Ar name Oc Ar ...
+.Op Ar name Ns = Ns Ar value ...
+.Sh DESCRIPTION
+The
+.Nm
+utility provides an interface for displaying and changing the system's
+configuration variables contained in EEPROM or NVRAM.
+In the first synopsis form, all available configuration variables and their
+current values are printed.
+In the second form, the variable selected by
+.Ar name
+is either removed or its value is changed to the
+.Ar value
+following by
+.Ql =
+sign.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl d Ar name
+Delete the variable selected by
+.Ar name
+from the EEPROM or NVRAM.
+The
+.Fl d
+flag can be specified multiple times, in which case multiple variables
+will be removed.
+.It Fl p
+Print all available configuration variables and their current values.
+.El
+.Sh EXAMPLES
+Print all available configuration variables and their current values:
+.Pp
+.Dl "nvram -p"
+.Pp
+Remove the variable named
+.Va local-mac-address? :
+.Pp
+.Dl "nvram -d local-mac-address\e?"
+.Pp
+Set the value of the
+.Va local-mac-address?
+variable to
+.Dq Li true :
+.Pp
+.Dl "nvram local-mac-address\e?=true"
+.Pp
+Note that the
+.Ql \e
+in the above examples is used to keep the shell from interpreting the
+.Ql \&? .
+.Pp
+Remove variables named
+.Va foo
+and
+.Va bar
+and set variable named
+.Va baz
+to
+.Dq Li 100 :
+.Pp
+.Dl "nvram -d foo -d bar baz=100"
+.Sh SEE ALSO
+.Xr powermac_nvram 4
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Fx 7.0 .
+It is inspired by the
+Darwin/Mac OS X
+.Nm
+utility.
+.Sh AUTHORS
+.An Maxim Sobolev Aq Mt sobomax@FreeBSD.org
diff --git a/usr.sbin/nvram/nvram.c b/usr.sbin/nvram/nvram.c
new file mode 100644
index 000000000000..bc0b55fed844
--- /dev/null
+++ b/usr.sbin/nvram/nvram.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright (c) 2006 Maxim Sobolev <sobomax@FreeBSD.org>
+ * 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 THE AUTHOR ``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 THE AUTHOR 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/types.h>
+#include <sys/uio.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <dev/powermac_nvram/powermac_nvramvar.h>
+
+#define DEVICE_NAME (_PATH_DEV "powermac_nvram")
+
+static void usage(void) __dead2;
+static int remove_var(uint8_t *, int, const char *);
+static int append_var(uint8_t *, int, const char *, const char *);
+
+struct deletelist {
+ char *name;
+ struct deletelist *next;
+ struct deletelist *last;
+};
+
+static union {
+ uint8_t buf[sizeof(struct chrp_header)];
+ struct chrp_header header;
+} conv;
+
+int
+main(int argc, char **argv)
+{
+ int opt, dump, fd, res, i, size;
+ uint8_t buf[NVRAM_SIZE], *cp, *common;
+ struct deletelist *dl;
+
+ dump = 0;
+ dl = NULL;
+
+ while((opt = getopt(argc, argv, "d:p")) != -1) {
+ switch(opt) {
+ case 'p':
+ dump = 1;
+ break;
+
+ case 'd':
+ if (dl == NULL) {
+ dl = malloc(sizeof(*dl));
+ if (dl == NULL)
+ err(1, "malloc");
+ bzero(dl, sizeof(*dl));
+ dl->last = dl;
+ } else {
+ dl->last->next = malloc(sizeof(*dl));
+ if (dl->last->next == NULL)
+ err(1, "malloc");
+ dl->last = dl->last->next;
+ bzero(dl->last, sizeof(*dl));
+ }
+ dl->last->name = optarg;
+ break;
+
+ default:
+ usage();
+ /* Not reached */
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 0 && dump == 0 && dl == NULL) {
+ usage();
+ /* Not reached */
+ }
+
+ fd = open(DEVICE_NAME, O_RDWR);
+ if (fd == -1)
+ err(1, DEVICE_NAME);
+ for (i = 0; i < (int)sizeof(buf);) {
+ res = read(fd, buf + i, sizeof(buf) - i);
+ if (res == -1 && errno != EINTR)
+ err(1, DEVICE_NAME);
+ if (res == 0)
+ break;
+ if (res > 0)
+ i += res;
+ }
+ if (i != sizeof(buf))
+ errx(1, "%s: short read", DEVICE_NAME);
+
+ /* Locate common block */
+ size = 0;
+ for (cp = buf; cp < buf + sizeof(buf); cp += size) {
+ memcpy(conv.buf, cp, sizeof(struct chrp_header));
+ size = conv.header.length * 0x10;
+ if (strncmp(conv.header.name, "common", 7) == 0)
+ break;
+ }
+ if (cp >= buf + sizeof(buf) || size <= (int)sizeof(struct chrp_header))
+ errx(1, "%s: no common block", DEVICE_NAME);
+ common = cp + sizeof(struct chrp_header);
+ size -= sizeof(struct chrp_header);
+
+ if (dump != 0) {
+ while (size > 0) {
+ i = strlen(common) + 1;
+ if (i == 1)
+ break;
+ printf("%s\n", common);
+ size -= i;
+ common += i;
+ }
+ exit(0);
+ }
+
+ for (;dl != NULL; dl = dl->next) {
+ if (remove_var(common, size, dl->name) == 0)
+ warnx("%s: no such variable", dl->name);
+ }
+
+ for (; argc > 0; argc--, argv++) {
+ cp = strchr(*argv, '=');
+ if (cp == NULL)
+ errx(1, "%s: invalid argument", *argv);
+ cp[0] = '\0';
+ cp++;
+ remove_var(common, size, *argv);
+ if (append_var(common, size, *argv, cp) == -1)
+ errx(1, "%s: error setting variable", *argv);
+ }
+
+ for (i = 0; i < (int)sizeof(buf);) {
+ res = write(fd, buf + i, sizeof(buf) - i);
+ if (res == -1 && errno != EINTR)
+ err(1, DEVICE_NAME);
+ if (res == 0)
+ break;
+ if (res > 0)
+ i += res;
+ }
+ if (i != sizeof(buf))
+ errx(1, "%s: short write", DEVICE_NAME);
+ if (close(fd) == -1)
+ err(1, DEVICE_NAME);
+
+ exit(0);
+}
+
+static void
+usage(void)
+{
+
+ fprintf(stderr, "usage: nvram [-p] | [-d name ...] [name=value ...]\n");
+ exit(1);
+}
+
+static int
+remove_var(uint8_t *buf, int len, const char *var_name)
+{
+ int nremoved, i, name_len;
+
+ nremoved = 0;
+ name_len = strlen(var_name);
+ while (len > 0) {
+ i = strlen(buf) + 1;
+ if (i == 1)
+ break;
+ if (strncmp(buf, var_name, name_len) == 0 && buf[name_len] == '=') {
+ memmove(buf, buf + i, len - i);
+ memset(buf + len - i, '\0', i);
+ nremoved += 1;
+ continue;
+ }
+ len -= i;
+ buf += i;
+ }
+ return nremoved;
+}
+
+static int
+append_var(uint8_t *buf, int len, const char *var_name, const char *var_value)
+{
+ int i, append_len;
+
+ while (len > 0) {
+ i = strlen(buf) + 1;
+ if (i == 1)
+ break;
+ len -= i;
+ buf += i;
+ }
+ append_len = strlen(var_name) + strlen(var_value) + 2;
+ if (len < append_len)
+ return -1;
+ sprintf(buf, "%s=%s", var_name, var_value);
+ return 0;
+}
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