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| author | ache <ache@FreeBSD.org> | 2001-08-31 19:50:25 +0000 |
|---|---|---|
| committer | ache <ache@FreeBSD.org> | 2001-08-31 19:50:25 +0000 |
| commit | 7d962c74f05d15237307926c3a50627b99db7e0b (patch) | |
| tree | 03e8d35d661564b0014d83106e783bad71d87258 /lib/libc/stdio/ungetc.c | |
| parent | f00df8355cfea7364defb72e3d4e7d06a7fe52d4 (diff) | |
| download | FreeBSD-src-7d962c74f05d15237307926c3a50627b99db7e0b.zip FreeBSD-src-7d962c74f05d15237307926c3a50627b99db7e0b.tar.gz | |
Disallow ungetc at offset 0 (to prevent negative offset happens), so simplify
checks in ftell.
Diffstat (limited to 'lib/libc/stdio/ungetc.c')
| -rw-r--r-- | lib/libc/stdio/ungetc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/libc/stdio/ungetc.c b/lib/libc/stdio/ungetc.c index f70fb42..092debd 100644 --- a/lib/libc/stdio/ungetc.c +++ b/lib/libc/stdio/ungetc.c @@ -132,6 +132,10 @@ __ungetc(int c, FILE *fp) } fp->_flags |= __SRD; } + + if (!(fp->_flags & __SSTR) && _ftello(fp) == 0) + return (EOF); + c = (unsigned char)c; /* |
