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346 Commits

Author SHA1 Message Date
Ruslan Ermilov
2f52231c66 mdoc(7) police: sort xrefs. 2001-11-20 13:58:21 +00:00
Murray Stokely
ac8b27d2ab Cross-reference the fdopen and fileno manpages. 
PR:		docs/31866
Submitted by:	W. Campbell <wcampbel@botbay.net>
 2001-11-14 16:24:51 +00:00
Andrey A. Chernov
7686e760b5 In > LONG_MAX test use sseek return value and not _offset which can be not 
active.
 2001-10-25 22:56:04 +00:00
Andrey A. Chernov
e41febc84b Help to recover from bad seek (i.e. negative or too big) happens beyond 
our pre-check control. Do the same way as refill.c does when it set __SERR,
i.e. clear read and ungetc buffers. Clear EOF flag too.
 2001-10-24 17:25:49 +00:00
Andrey A. Chernov
3f498bf72b Back out read buffer invalidating via __SMOD. 
It was correct, but not needed because internal buffer cleared on each seek
outside of it.
 2001-10-23 23:52:11 +00:00
Andrey A. Chernov
0502fac881 Change comment explaining another usage of __SMOD 2001-10-23 23:05:15 +00:00
Andrey A. Chernov
751fc77994 Disallow fseek() optimization in internal read buffer, if pointer is moved by 
seek. It means that beginning of read buffer becomes not the same as current
file position.
 2001-10-23 22:48:00 +00:00
Bruce Evans
18ca70d12d Fixed style bugs in previous commit. 2001-10-15 04:29:06 +00:00
Doug Rabson
a387081c63 Make this compile on ia64. 2001-10-14 13:45:33 +00:00
Ruslan Ermilov
32eef9aeb1 mdoc(7) police: Use the new .In macro for #include statements. 2001-10-01 16:09:29 +00:00
Andrey A. Chernov
1b89a29689 1) If __SAPP stream is not seekable, remove __SAPP flag on first call instead 
of repeating unsuccessful lseek call on each write (original stdio bug).

2) Save errno accross _sseek call in _swrite to not touch it in case write
success (original stdio bug).

3) Add _sseek error checking back, but only for __SOPT mode now.
 2001-09-07 17:16:02 +00:00
Andrey A. Chernov
ac206f37a1 For now just back out seek error checking in __SAPP case, it cause problems 
with non-seekable streams.  Now here is what here was originally, but it is
ugly, producing unneded seek syscall on each non-seekable stream write.  I'll
think about proper solution later.
 2001-09-07 02:13:11 +00:00
Andrey A. Chernov
347a15b2ab When __SOPT is cleared, clear __SOFF too. 
NOTE: original stdio bug.
 2001-09-03 02:35:10 +00:00
Andrey A. Chernov
5e00917d95 Re-arrange my funopen(3) fix to minimize differences with original stdio code, 
no functional changes.

Add fp->_offset optimization in _SAPP+_SOPT case
 2001-09-03 02:24:37 +00:00
Andrey A. Chernov
aeb7f4bac4 Internal seeks are overoptimized. They should remember fp->_offset only for 
plain regular files, i.e. files with __SOPT flag set. Fix it, so ftell(stdout)
always returns the same as lseek(1, 0, 1) now.

NOTE: this bug was in original stdio code
 2001-09-02 21:22:00 +00:00
Andrey A. Chernov
778d840e50 Fix bug in off_t overflow checking: if fp->_offset overflows, just remove 
__SOFF flag (i.e. we don't have offset) instead of returning EOVERFLOW.
It allows again continious reading from non-stop stream.
 2001-09-02 19:52:09 +00:00
Andrey A. Chernov
bf351925f7 Typo seek(2) -> lseek(2) 2001-09-02 19:24:07 +00:00
Andrey A. Chernov
924888f977 Move all stdio internal flags processing and setting out of __sread(), 
__swrite() and __sseek() to higher level. According to funopen(3) they all
are just wrappers to something like standard read(2), write(2) and
lseek(2), i.e. must not touch stdio internals because they are replaceable
with any other functions knows nothing about stdio internals. See example
of funopen(3) usage in sendmail sources f.e.

NOTE: this is original stdio bug, not result of my range checkin added.
 2001-09-02 19:10:10 +00:00
Andrey A. Chernov
35e1a550de Save errno before function call and restore it on success (because many 
internal functions there may fail and set (i.e. overwrite) errno in normal
(not error) situation). In original variant errno testing after call
(as POSIX suggest) is wrong when errno overwrite happens.
 2001-09-01 15:28:24 +00:00
Andrey A. Chernov
d911eb4536 Remove even more unneded checks, original code can't overflows in that place 2001-09-01 15:01:37 +00:00
Andrey A. Chernov
4fd8a4cf24 Remove two checks unneeded now (can't happens) 2001-09-01 14:48:45 +00:00
Andrey A. Chernov
45892fd855 Make fseek(... SEEK_CUR) fails if current file-position is unspecified. 2001-09-01 14:40:01 +00:00
Andrey A. Chernov
3c4d9468b0 Note that prev. commit addition is for ftell/ftello 2001-09-01 14:23:30 +00:00
Andrey A. Chernov
2f5eadff6b Describe ESPIPE as result of unspecified file-position indicator value. 
Add more to SEE ALSO section.
 2001-09-01 14:11:53 +00:00
Andrey A. Chernov
a914951d68 Describe file-position behaviour from POSIX 2001-09-01 14:01:52 +00:00
Andrey A. Chernov
6ff604a73a Strict in the POSIX sence, if file position is unspecified after ungetc() at 
0, return that we can't specify it, i.e. error with ESPIPE.
(hint from: "Peter S. Housel" <housel@acm.org>)

Back out sinit() addition, not needed after various code simplifications.
 2001-09-01 12:13:33 +00:00
Andrey A. Chernov
6946977c36 If lseek to wrong value sucessfully happens despite all pre-checks, set __SERR 
to indicate that stream becomes inconsistent.
 2001-09-01 11:21:28 +00:00
Andrey A. Chernov
b13ed88361 If position is underflowed, don't try to hide that fact by recovery, just 
return EIO and set __SERR to mark stream as inconsistent.
 2001-09-01 11:18:53 +00:00
Andrey A. Chernov
65efd81290 Back out disabling ungetc() at 0, use different solution: 
keep negative offset internally, but return 0 externally in ftell*()
I.e. use 0 now as 'unspecified value' per POSIX ungetc() description.
 2001-09-01 01:56:54 +00:00
Andrey A. Chernov
598bb4cb30 Add originally missing __sinit() call. 2001-08-31 20:36:19 +00:00
Andrey A. Chernov
c4b2cc78e3 Simplify offset underflow checks even more 2001-08-31 20:17:32 +00:00
Andrey A. Chernov
711b11769d Describe that we disallow ungetc at offset 0 now. 2001-08-31 20:03:49 +00:00
Andrey A. Chernov
4db40fd143 Disallow ungetc at offset 0 (to prevent negative offset happens), so simplify 
checks in ftell.
 2001-08-31 19:50:25 +00:00
Andrey A. Chernov
7cf30ace84 Drop buffer first, _then_ ask for real position 2001-08-31 18:54:44 +00:00
Andrey A. Chernov
2ff678f5bb The same big piece of ftell code repeated in 3 places. Simplify things moving 
it into one subfunction instead.
Try to use real offset in strange cases.
 2001-08-31 18:23:29 +00:00
Andrey A. Chernov
ee75810413 If file offset is smaller than internal buffer character left count, just drop 
internal buffer and trust offset, not return error.
 2001-08-31 14:11:14 +00:00
Andrey A. Chernov
1dfa423639 Initialize _offset to 0 in fopen(), it helps to optimize fseek/ftell 2001-08-31 13:14:49 +00:00
Andrey A. Chernov
ca934ebcae Detect fp->_offset overflow on read 
Use errno to catch negative seek with -1 offset
 2001-08-31 12:55:22 +00:00
Ruslan Ermilov
d6002fef6f Use ``.Rv -std'' wherever possible. 
Submitted by:	yar
 2001-08-31 09:57:38 +00:00
Andrey A. Chernov
57935eeb3d Try to discard some ungetc data in saved internal buffer checks too, 
if offset tends to be negative.
 2001-08-30 20:49:47 +00:00
Andrey A. Chernov
77f71bc5ac goto dumb; if can't obtain curoff for whence != SEEK_CUR cases, as supposed 2001-08-30 20:19:45 +00:00
Andrey A. Chernov
e54bc118c1 Add more EOVERFLOW checks. 
When file offset tends to be negative due to internal and ungetc buffers
additions counted, try to discard some ungetc data first, then return EBADF.
Later one can happens if lseek(fileno(fd),...) called f.e. POSIX says that
ungetc beyond beginning of the file results are undefined, so we can just
discard some of ungetc data in that case.

Don't rely on gcc cast when checking for overflow, use OFF_MAX.

Cosmetique.
 2001-08-30 19:54:04 +00:00
Andrey A. Chernov
b0eeb07b5b Cosmetique fixes from bde 2001-08-26 10:38:29 +00:00
Andrey A. Chernov
f0d5097e06 Cosmetique: correct English in comments 2001-08-23 14:49:02 +00:00
Kris Kennaway
6dac8ac9e5 Mark some functions as __printflike() and/or taking const char * arguments 
instead of char *.

MFC after:	2 weeks
 2001-08-20 12:53:36 +00:00
Andrey A. Chernov
c5981656ea Add about rewind+errno, describe ESPIPE, minor formatting. 2001-08-19 08:24:50 +00:00
Andrey A. Chernov
98aa5183a2 Simplify overflow calculations a bit 2001-08-17 11:08:56 +00:00
Andrey A. Chernov
4a9f1ee4e5 Remove extra check, already done in upper level caller, i.e. in 
_fseeko()
 2001-08-17 10:43:03 +00:00
Andrey A. Chernov
5fdaf178ae Mention ftell & ftello in EOVERFLOW section too. 2001-08-17 10:29:09 +00:00
Andrey A. Chernov
b98ba4224b Add more overflow checks in case of fseek() 2001-08-17 10:22:03 +00:00