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| author | ache <ache@FreeBSD.org> | 2001-08-15 02:07:47 +0000 |
|---|---|---|
| committer | ache <ache@FreeBSD.org> | 2001-08-15 02:07:47 +0000 |
| commit | 9d7273169f482f1f74606c9f559ecc986f668088 (patch) | |
| tree | c651de630103d0b82ee727fa499a87af0697e6f6 /lib/libc/stdio/fseek.3 | |
| parent | 679dd2c9f81d6f490f3db2613cb62f20c7cf93ab (diff) | |
| download | FreeBSD-src-9d7273169f482f1f74606c9f559ecc986f668088.zip FreeBSD-src-9d7273169f482f1f74606c9f559ecc986f668088.tar.gz | |
1) Disallow negative seek as POSIX require for fseek{o} (but not for lseek):
"[EINVAL] ... The resulting file-position indicator would be set to a
negative value."
Moreover, in real life negative seek in stdio cause EOF indicator cleared
and not set again forever even if EOF returned.
2) Catch few possible off_t overflows.
Reviewed by: arch discussion
Diffstat (limited to 'lib/libc/stdio/fseek.3')
| -rw-r--r-- | lib/libc/stdio/fseek.3 | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/lib/libc/stdio/fseek.3 b/lib/libc/stdio/fseek.3 index 9a58668..b37aa17 100644 --- a/lib/libc/stdio/fseek.3 +++ b/lib/libc/stdio/fseek.3 @@ -180,18 +180,12 @@ is not a seekable stream. .It Bq Er EINVAL The .Fa whence -argument to -.Fn fseek -was not -.Dv SEEK_SET , -.Dv SEEK_END , -or -.Dv SEEK_CUR . +argument is invalid. +The resulting file-position +indicator would be set to a negative value. .It Bq Er EOVERFLOW -For -.Fn ftell , -the resulting file offset would be a value which -cannot be represented correctly in an object of type long. +The resulting file offset would be a value which +cannot be represented correctly in an object of type requested. .El .Pp The functions |
