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--- src/efivarfs.c.orig 2024-01-31 20:08:46 UTC
+++ src/efivarfs.c
@@ -9,20 +9,32 @@
#include <err.h>
#include <errno.h>
#include <fcntl.h>
-#include <linux/magic.h>
+#if defined(__linux__)
+# include <linux/magic.h>
+#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/uio.h>
-#include <sys/vfs.h>
+#if defined(__linux__)
+# include <sys/vfs.h>
+#endif
#include <unistd.h>
+#if defined(__FreeBSD__)
+# undef LIST_HEAD
+#endif
+
#include "efivar.h"
-#include <linux/fs.h>
+#if defined(__linux__)
+# include <linux/fs.h>
+#endif
#ifndef EFIVARFS_MAGIC
# define EFIVARFS_MAGIC 0xde5e81e4
@@ -102,6 +114,7 @@ efivarfs_set_fd_immutable(int fd, int immutable)
static int
efivarfs_set_fd_immutable(int fd, int immutable)
{
+#if defined(__linux__)
unsigned int flags;
int rc = 0;
@@ -124,11 +137,42 @@ efivarfs_set_fd_immutable(int fd, int immutable)
}
return rc;
+#elif defined(__FreeBSD__)
+ struct stat sb;
+ int rc = 0;
+ unsigned long flags;
+
+ if (fstat(fd, &sb) == -1) {
+ if (errno == EBADF)
+ rc = 0;
+ else
+ efi_error("fstat(%d) failed", fd);
+ return rc;
+ }
+
+ flags = sb.st_flags;
+
+ if ((immutable && !(flags & UF_IMMUTABLE)) ||
+ (!immutable && (flags & UF_IMMUTABLE))) {
+ if (immutable)
+ flags |= UF_IMMUTABLE;
+ else
+ flags &= ~UF_IMMUTABLE;
+
+ if (chflagsat(fd, "", flags, AT_EMPTY_PATH) == -1) {
+ efi_error("chflagsat(%d) failed\n", fd);
+ rc = -1;
+ }
+ }
+
+ return rc;
+#endif
}
static int
efivarfs_make_fd_mutable(int fd, unsigned long *orig_attrs)
{
+#if defined(__linux__)
unsigned long mutable_attrs = 0;
*orig_attrs = 0;
@@ -145,6 +189,26 @@ efivarfs_make_fd_mutable(int fd, unsigned long *orig_a
return -1;
return 0;
+#elif defined(__FreeBSD__)
+ struct stat sb;
+
+ *orig_attrs = 0;
+
+ if (fstat(fd, &sb) == -1)
+ return -1;
+
+ *orig_attrs = sb.st_flags;
+
+ // if the file is not immutable, nothing to do
+ if ((sb.st_flags & UF_IMMUTABLE) == 0)
+ return 0;
+
+ // remove user immutable flag
+ if (chflagsat(fd, "", sb.st_flags & ~UF_IMMUTABLE, AT_EMPTY_PATH) == -1)
+ return -1;
+
+ return 0;
+#endif
}
static int
@@ -375,10 +439,17 @@ efivarfs_set_variable(efi_guid_t guid, const char *nam
goto err;
}
+#if defined(__linux__)
/* if the file is indeed immutable, clear and remember it */
if (efivarfs_make_fd_mutable(rfd, &orig_attrs) == 0 &&
(orig_attrs & FS_IMMUTABLE_FL))
restore_immutable_fd = rfd;
+#elif defined(__FreeBSD__)
+ /* if the file is indeed immutable, clear and remember it */
+ if (efivarfs_make_fd_mutable(rfd, &orig_attrs) == 0 &&
+ (orig_attrs & UF_IMMUTABLE))
+ restore_immutable_fd = rfd;
+#endif
}
/*
@@ -414,9 +485,15 @@ efivarfs_set_variable(efi_guid_t guid, const char *nam
* immediately, and the write() below would fail otherwise.
*/
if (rfd == -1) {
+#if defined(__linux__)
if (efivarfs_make_fd_mutable(wfd, &orig_attrs) == 0 &&
(orig_attrs & FS_IMMUTABLE_FL))
restore_immutable_fd = wfd;
+#elif defined(__FreeBSD__)
+ if (efivarfs_make_fd_mutable(wfd, &orig_attrs) == 0 &&
+ (orig_attrs & UF_IMMUTABLE))
+ restore_immutable_fd = wfd;
+#endif
} else {
/* make sure rfd and wfd refer to the same file */
struct stat wfd_stat;
@@ -452,7 +529,11 @@ err:
if (ret == -1 && rfd == -1 && wfd != -1 && unlink(path) == -1)
efi_error("failed to unlink %s", path);
+#if defined(__linux__)
ioctl(restore_immutable_fd, FS_IOC_SETFLAGS, &orig_attrs);
+#elif defined(__FreeBSD__)
+ chflagsat(restore_immutable_fd, "", orig_attrs, AT_EMPTY_PATH);
+#endif
if (wfd >= 0)
close(wfd);
|
