make getmntent_r discard long lines when it returns error, not seek back

seeking back can be performed by the caller, but if the caller doesn't
expect it, it will result in an infinite loop of failures.

diff --git a/src/linux/mntent.c b/src/linux/mntent.c
index f151625285c36e6e92dcd2667c18beb3430a6478..3eafba5e0b387ce98e0aefde2bbdaf8288757af9 100644 (file)
--- a/src/linux/mntent.c
+++ b/src/linux/mntent.c
@@ -25,8 +25,7 @@ struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int bufle
                fgets(linebuf, buflen, f);
                if (feof(f) || ferror(f)) return 0;
                if (!strchr(linebuf, '\n')) {
-                       if (fseeko(f, -(off_t)strlen(linebuf), SEEK_CUR))
-                               fscanf(f, "%*[^\n]%*[\n]");
+                       fscanf(f, "%*[^\n]%*[\n]");
                        errno = ERANGE;
                        return 0;
                }