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Create /dev/root symlink pointing to real root device, if any.

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This commit is contained in:
Rob Landley 2006-02-21 06:11:13 +00:00
parent c5789a6e23
commit a7e3d05208
1 changed files with 11 additions and 0 deletions
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11
util-linux/mdev.c
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@ -16,6 +16,7 @@
#include <string.h> #include <string.h>
#include <sys/mman.h> #include <sys/mman.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
#include <stdlib.h> #include <stdlib.h>
@ -27,6 +28,8 @@
#include <busybox.h> #include <busybox.h>
int root_major, root_minor;
/* mknod in /dev based on a path like "/sys/block/hda/hda1" */ /* mknod in /dev based on a path like "/sys/block/hda/hda1" */
static void make_device(char *path) static void make_device(char *path)
{ {
@ -169,6 +172,9 @@ found_device:
if (mknod(temp, mode | type, makedev(major, minor)) && errno != EEXIST) if (mknod(temp, mode | type, makedev(major, minor)) && errno != EEXIST)
bb_perror_msg_and_die("mknod %s failed", temp); bb_perror_msg_and_die("mknod %s failed", temp);
if (major==root_major && minor==root_minor)
symlink(temp,DEV_PATH "/root");
if (ENABLE_FEATURE_MDEV_CONF) chown(temp,uid,gid); if (ENABLE_FEATURE_MDEV_CONF) chown(temp,uid,gid);
end: end:
@ -217,6 +223,11 @@ int mdev_main(int argc, char *argv[])
/* Scan */ /* Scan */
if (argc == 2 && !strcmp(argv[1],"-s")) { if (argc == 2 && !strcmp(argv[1],"-s")) {
struct stat st;
stat("/", &st); // If this fails, we have bigger problems.
root_major=major(st.st_dev);
root_minor=minor(st.st_dev);
strcpy(temp,"/sys/block"); strcpy(temp,"/sys/block");
find_dev(temp); find_dev(temp);
strcpy(temp,"/sys/class"); strcpy(temp,"/sys/class");