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 f151625..3eafba5 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')) {
                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;
                }
                        errno = ERANGE;
                        return 0;
                }