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[PATCH] make symlink work properly if there is already a file in its place

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If a file that is not a symlink (node, socket, fifo, etc) already
exist where udev need to create a symlink, symlink() fails.  This
patch basically test for an existing file, and unlink it.
This commit is contained in:
azarah@nosferatu.za.org 2003-12-30 01:33:35 -08:00 committed by Greg KH
parent 13148857cb
commit 3f09184b43
1 changed files with 11 additions and 0 deletions
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11
udev-add.c
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@ -100,6 +100,7 @@ static int create_path(char *file)
static int create_node(struct udevice *dev)
{
struct stat stats;
char filename[255];
char linktarget[255];
char *linkname;
@ -221,6 +222,16 @@ static int create_node(struct udevice *dev)
strcpy(linktarget, "./");
strcat(linktarget, &dev->name[tail]);
/* unlink existing non-directories to ensure that our symlink
* is created */
if (lstat(filename, &stats) == 0) {
if ((stats.st_mode & S_IFMT) != S_IFDIR) {
if (unlink(filename))
dbg("unlink(%s) failed with error '%s'",
filename, strerror(errno));
}
}
dbg("symlink(%s, %s)", linktarget, filename);
retval = symlink(linktarget, filename);
if (retval)