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libudev: do not overwrite path with readlink() call

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This commit is contained in:
Kay Sievers 2010-12-09 21:08:19 +01:00
parent 329239f506
commit 8ba13ec1cd
1 changed files with 5 additions and 4 deletions
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9
libudev/libudev-util.c
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@ -26,15 +26,16 @@
static ssize_t get_sys_link(struct udev *udev, const char *slink, const char *syspath, char *value, size_t size)
{
char path[UTIL_PATH_SIZE];
char target[UTIL_PATH_SIZE];
ssize_t len;
const char *pos;
util_strscpyl(path, sizeof(path), syspath, "/", slink, NULL);
len = readlink(path, path, sizeof(path));
if (len <= 0 || len == (ssize_t)sizeof(path))
len = readlink(path, target, sizeof(target));
if (len <= 0 || len == (ssize_t)sizeof(target))
return -1;
path[len] = '\0';
pos = strrchr(path, '/');
target[len] = '\0';
pos = strrchr(target, '/');
if (pos == NULL)
return -1;
pos = &pos[1];