From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 28 Sep 2011 23:37:14 +0000 (-0400)
Subject: make getmntent_r discard long lines when it returns error, not seek back
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=ede5ae7b0bb5a7ed9edeb2eeb8e24d30af64d185;hp=9cee9307e3b8ed31e772d564d1dc53e6d888acba

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 f1516252..3eafba5e 100644
--- 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;
 		}