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

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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.
This commit is contained in:
Rich Felker 2011-09-28 19:37:14 -04:00
parent 9cee9307e3
commit ede5ae7b0b
1 changed files with 1 additions and 2 deletions
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3
src/linux/mntent.c
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@ -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;
}