klibc-bot for Greg Thelen
2022-Aug-03 22:51 UTC
[klibc] [klibc:master] Revert " remove local insmod.c copy"
Commit-ID: 2f31533dd248f24c8f90a0551cf86b09f144b77c
Gitweb:
http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=2f31533dd248f24c8f90a0551cf86b09f144b77c
Author: Greg Thelen <gthelen at google.com>
AuthorDate: Mon, 1 Aug 2022 22:30:12 -0700
Committer: Ben Hutchings <ben at decadent.org.uk>
CommitDate: Tue, 2 Aug 2022 22:31:47 +0200
[klibc] Revert " remove local insmod.c copy"
This reverts commit fbf8aa559d25685eea12248c76bcc983c68306b2.
insmod is useful to load boot drivers prior to calling kinit.
Signed-off-by: Greg Thelen <gthelen at google.com>
Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
---
usr/utils/Kbuild | 4 +-
usr/utils/insmod.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 143 insertions(+), 1 deletion(-)
diff --git a/usr/utils/Kbuild b/usr/utils/Kbuild
index 38abb8fe..002342f7 100644
--- a/usr/utils/Kbuild
+++ b/usr/utils/Kbuild
@@ -4,7 +4,7 @@
progs := chroot dd mkdir mkfifo mknod mount pivot_root umount
progs += true false sleep ln mv nuke minips cat ls losetup
-progs += uname halt kill readlink cpio sync dmesg
+progs += insmod uname halt kill readlink cpio sync dmesg
static-y := $(addprefix static/, $(progs))
shared-y := $(addprefix shared/, $(progs))
@@ -46,6 +46,8 @@ static/minips-y := minips.o
shared/minips-y := minips.o
static/cat-y := cat.o
shared/cat-y := cat.o
+static/insmod-y := insmod.o
+shared/insmod-y := insmod.o
static/uname-y := uname.o
shared/uname-y := uname.o
static/halt-y := halt.o
diff --git a/usr/utils/insmod.c b/usr/utils/insmod.c
new file mode 100644
index 00000000..47b58800
--- /dev/null
+++ b/usr/utils/insmod.c
@@ -0,0 +1,140 @@
+/* insmod.c: insert a module into the kernel.
+ Copyright (C) 2001 Rusty Russell.
+ Copyright (C) 2002 Rusty Russell, IBM Corporation.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define streq(a,b) (strcmp((a),(b)) == 0)
+
+/* This really needs to be in a header file... */
+extern long init_module(void *, unsigned long, const char *);
+
+static void print_usage(const char *progname)
+{
+ fprintf(stderr, "Usage: %s filename [args]\n", progname);
+ exit(1);
+}
+
+/* We use error numbers in a loose translation... */
+static const char *moderror(int err)
+{
+ switch (err) {
+ case ENOEXEC:
+ return "Invalid module format";
+ case ENOENT:
+ return "Unknown symbol in module";
+ case ESRCH:
+ return "Module has wrong symbol version";
+ case EINVAL:
+ return "Invalid parameters";
+ default:
+ return strerror(err);
+ }
+}
+
+static void *grab_file(const char *filename, unsigned long *size)
+{
+ unsigned int max = 16384;
+ int ret, fd;
+ void *buffer = malloc(max);
+
+ if (streq(filename, "-"))
+ fd = dup(STDIN_FILENO);
+ else
+ fd = open(filename, O_RDONLY, 0);
+
+ if (fd < 0)
+ return NULL;
+
+ *size = 0;
+ while ((ret = read(fd, buffer + *size, max - *size)) > 0) {
+ *size += ret;
+ if (*size == max)
+ buffer = realloc(buffer, max *= 2);
+ }
+ if (ret < 0) {
+ free(buffer);
+ buffer = NULL;
+ }
+ close(fd);
+ return buffer;
+}
+
+int main(int argc, char *argv[])
+{
+ int i;
+ long int ret;
+ unsigned long len;
+ void *file;
+ char *filename, *options = strdup("");
+ char *progname = argv[0];
+
+ if (argv[1] && (streq(argv[1], "--version") ||
streq(argv[1], "-V"))) {
+ puts("klibc insmod");
+ exit(0);
+ }
+
+ /* Ignore old options, for backwards compat. */
+ while (argv[1] && (streq(argv[1], "-p")
+ || streq(argv[1], "-s")
+ || streq(argv[1], "-f"))) {
+ argv++;
+ argc--;
+ }
+
+ filename = argv[1];
+ if (!filename)
+ print_usage(progname);
+
+ /* Rest is options */
+ for (i = 2; i < argc; i++) {
+ options = realloc(options,
+ strlen(options) + 2 + strlen(argv[i]) + 2);
+ /* Spaces handled by "" pairs, but no way of escaping
+ quotes */
+ if (strchr(argv[i], ' '))
+ strcat(options, "\"");
+ strcat(options, argv[i]);
+ if (strchr(argv[i], ' '))
+ strcat(options, "\"");
+ strcat(options, " ");
+ }
+
+ file = grab_file(filename, &len);
+ if (!file) {
+ fprintf(stderr, "insmod: can't read '%s': %s\n",
+ filename, strerror(errno));
+ exit(1);
+ }
+
+ ret = init_module(file, len, options);
+ if (ret != 0) {
+ fprintf(stderr, "insmod: error inserting '%s': %li %s\n",
+ filename, ret, moderror(errno));
+ exit(1);
+ }
+ exit(0);
+}