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Fix long known bug with handling device aliases residing not in devfs root.

Browse Source 
Historically creation of device aliases created symbolic links using only
name of target device as a link target, not considering current directory.
Fix that by adding number of "../" chunks to the terget device name,
required to get out of the current directory to devfs root first.

MFC after:	1 month
This commit is contained in:
Alexander Motin 2013-12-12 11:05:48 +00:00
parent e00bea9e62
commit ca187878c0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=259254
1 changed files with 12 additions and 4 deletions
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16
sys/fs/devfs/devfs_devs.c
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@ -486,9 +486,9 @@ devfs_populate_loop(struct devfs_mount *dm, int cleanup)
{
struct cdev_priv *cdp;
struct devfs_dirent *de;
struct devfs_dirent *dd;
struct devfs_dirent *dd, *dt;
struct cdev *pdev;
int de_flags, j;
int de_flags, depth, j;
char *q, *s;
sx_assert(&dm->dm_lock, SX_XLOCKED);
@ -589,9 +589,17 @@ devfs_populate_loop(struct devfs_mount *dm, int cleanup)
de->de_mode = 0755;
de->de_dirent->d_type = DT_LNK;
pdev = cdp->cdp_c.si_parent;
j = strlen(pdev->si_name) + 1;
dt = dd;
depth = 0;
while (dt != dm->dm_rootdir &&
(dt = devfs_parent_dirent(dt)) != NULL)
depth++;
j = depth * 3 + strlen(pdev->si_name) + 1;
de->de_symlink = malloc(j, M_DEVFS, M_WAITOK);
bcopy(pdev->si_name, de->de_symlink, j);
de->de_symlink[0] = 0;
while (depth-- > 0)
strcat(de->de_symlink, "../");
strcat(de->de_symlink, pdev->si_name);
} else {
de->de_uid = cdp->cdp_c.si_uid;
de->de_gid = cdp->cdp_c.si_gid;